WO2006108363A2 - Layered sound absorptive non-woven fabric - Google Patents

Layered sound absorptive non-woven fabric Download PDF

Info

Publication number
WO2006108363A2
WO2006108363A2 PCT/CZ2006/000017 CZ2006000017W WO2006108363A2 WO 2006108363 A2 WO2006108363 A2 WO 2006108363A2 CZ 2006000017 W CZ2006000017 W CZ 2006000017W WO 2006108363 A2 WO2006108363 A2 WO 2006108363A2
Authority
WO
WIPO (PCT)
Prior art keywords
layer
nanofibres
surface weight
sound
fabric
Prior art date
Application number
PCT/CZ2006/000017
Other languages
French (fr)
Other versions
WO2006108363A3 (en
WO2006108363B1 (en
Inventor
Klara Kalinova
Filip Sanetrnik
Oldrich Jirsak
Ladislav Mares
Original Assignee
Elmarco, S.R.O
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Elmarco, S.R.O filed Critical Elmarco, S.R.O
Priority to EA200702133A priority Critical patent/EA011173B1/en
Priority to AU2006233442A priority patent/AU2006233442A1/en
Priority to CA002601813A priority patent/CA2601813A1/en
Priority to JP2008505720A priority patent/JP2008537798A/en
Priority to EP06722444A priority patent/EP1869239A2/en
Priority to US11/911,135 priority patent/US20080173497A1/en
Publication of WO2006108363A2 publication Critical patent/WO2006108363A2/en
Publication of WO2006108363A3 publication Critical patent/WO2006108363A3/en
Publication of WO2006108363B1 publication Critical patent/WO2006108363B1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/022—Non-woven fabric
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/08—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer the fibres or filaments of a layer being of different substances, e.g. conjugate fibres, mixture of different fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/0007—Electro-spinning
    • D01D5/0061—Electro-spinning characterised by the electro-spinning apparatus
    • D01D5/0076—Electro-spinning characterised by the electro-spinning apparatus characterised by the collecting device, e.g. drum, wheel, endless belt, plate or grid
    • D01D5/0084—Coating by electro-spinning, i.e. the electro-spun fibres are not removed from the collecting device but remain integral with it, e.g. coating of prostheses
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/728—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by electro-spinning
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H13/00—Other non-woven fabrics
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
    • G10K11/162—Selection of materials
    • G10K11/168—Plural layers of different materials, e.g. sandwiches
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/20—All layers being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/02—Synthetic macromolecular fibres
    • B32B2262/0276—Polyester fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/12—Conjugate fibres, e.g. core/sheath or side-by-side
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/10—Properties of the layers or laminate having particular acoustical properties
    • B32B2307/102—Insulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2419/00—Buildings or parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2605/00—Vehicles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures

Definitions

  • the invention relates to the layered sound absorptive non-woven fabric containing the resonance membrane and at least one another layer of fibrous material.
  • the sound absorptive materials are generally used in automotive, aviation, building as well as machinery industry. Their task is to provide for hygiene of surroundings from the point of view of undesired and harmful sound.
  • the proposal itself of a suitable acoustic material is based on frequency area of an undesired sound in the given surroundings.
  • porous materials For absorbing of high frequency sound especially the porous materials are used which are nevertheless unsuitable for absorbing of sound of lower frequencies, this especially due to great material thickness needed.
  • used materials include for example the melamine, polyurethane and metal foams or non-woven fabrics of mineral or polymeric fibres. Such materials are not so much suitable for absorbing of sound of lower frequencies, as a great material thickness is needed.
  • the general objective is to combine the above mentioned characteristics into one acoustic system, which would be able to absorb both the sound of low as well as the sound of high frequencies.
  • the layered sound absorptive material composed of one or several identical layers of fibres of diameter 0.05 to 5 micrometers obtained through splitting of the PVA foil is known from the JP 10251951 A. These fibres usually show a broad distribution of diameters, but only a very low percentage of these fibres may have the diameter under 1 micrometer. The data on sound absorption at low frequency, which shows a low efficiency of 10 percent also corresponds to this fact.
  • the layered sound absorptive material composed of several layers of non- woven fabric and several layers of polyester fibres of common diameters produced by means of the melt-blown method, through which the smallest diameter of fibres of about 1 micrometer may be achieved, is known from the JP 2003049351 A.
  • the disadvantage is that this material is designated especially for absorbing of sound of medium frequencies, namely from 1000 to 4000 Hz.
  • the objective of the invention is to eliminate or at least to minimise the disadvantages of present state of the art and to create a fabric capable at low thickness to absorb both the low as well as the high frequencies of sound.
  • the objective of the invention has been achieved by a layered sound absorptive non-woven fabric containing the resonance membrane and at least one another layer of fibrous material, whose principle consists in that the resonance membrane is formed by a layer of nanofibres of diameter to 600 nanometers and of surface weight 0,1 to 5 g/m 2 , when the resonance membrane together with at least one layer of fibrous material is formed by means of cross laying to the required thickness and surface weight.
  • the layer of nanofibres is created through the electrostatic spinning of polymer solution, as such layer of nanofibres may be applied on the substrate layer of fibrous material during spinning, and joined with this layer consequently.
  • the substrate layer of fibrous material is, according to the claim 3, with advantage created by at least one layer of carded fibrous web consisting of fibres having diameter of 10 to 45 micrometers and of surface weight of 5 to 100g/m 2 .
  • the layer of nanofibres with a layer of carded fibrous web consisting of fibres having diameter of 10 to 45 micrometers and surface weight of 5 to 100g/m 2 is joined on its each side.
  • the sound absorptive fabric according to the invention absorbs the sound at low frequencies and simultaneously it does not lose the ability of absorption capacity for the higher sound frequencies. Through this ability, which is based on the resonance effect of nanofibre layer damped in elastic manner by the substrate layer created with advantage by the carded fibrous web, it surpasses to date known materials.
  • Fig. 1 shows the cross section of fabric made of carded fibrous web and a nanofibre layer
  • the Fig.2 the cross section of fabric made of carded fibrous web, a nanofibre layer and another layer of carded fibrous web
  • the Fig.3 shows the cross section of fabric made of layer of carded fibrous web, a nanofibre layer and a couple of another layers of carded fibrous web
  • the Fig. 4 the cross section of fabric made of layer of carded fibrous web, a nanonfibre layer and a trio of layers of carded fibrous web
  • the Fig. 5 to 11 show the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the nanofibre layer itself for examples 1 to 7.
  • the layered sound absorptive non-woven fabric according to Fig. 1 contains the resonance membrane created by a layer 2 of nanofibres of diameter to 600 nanometers produced through electrostatic spinning and of surface weight of 0,1 to 5 g/m 2 , and a layer 1. of carded fibrous web, when in the advantageous execution the layer ⁇ of carded fibrous web creates the carrying layer to which during electrostatic spinning the layer 2 of produced nanofibres is deposited, after which both layers join together through a known way at a specified temperature in the hot-air chamber.
  • another layer 3 of carded fibrous web namely from the originally free side of the layer 2 of nanofibres.
  • another layer 3 may be a double one - see the Fig. 3, or a triple one - see the Fig. 4.
  • this fabric is formed by means of cross laying to the required thickness and to the required surface weight.
  • the layer 2 of nanofibres fulfils the function of acoustic resonance membrane vibrating at the low frequency. This character is given by the nano- dimensions of space among the fibres. If a sound wave falls to the acoustic resonance membrane, it brings it to the forced vibration, whose amplitude is maximum in case of resonance, simultaneously the neighbouring layers 1, 3 of carded fibrous web provide for a sufficient damping of the vibrating membrane, at the same time the maximum quantity of the sound energy gathered in the resonator is transferred into a heat.
  • the layer i and/or 3 of the carded fibrous web provides not only for a sufficient damping of vibrating membrane created by a layer 2 of nanofibres, but also absorbs the sounds of higher frequencies.
  • the above mentioned layers 1, 2, 3 are at the same time associated into one resonance system through laying of individual layers ⁇ , 2, 3 one on another and through their joining for example in the hot-air bonding chamber.
  • This laying of resonance elements such a material is being produced which, thanks to the resonance membrane created by the layer 2 of nanofibres, absorbs the sound of low frequencies and simultaneously through the layer X and/or 3 of the carded fibrous web, also the sound of higher frequencies.
  • the fabric according to the invention reaches high values of coefficient of sound absorption capacity for the sounds of low as well as of high frequency, simultaneously it is possible to adjust the material thickness and possibly its surface weight to various requirements.
  • the sound absorptive fabric contains a layer I of carded fibrous web of surface weight of 11 gm "2 produced on the carding machine of the bicomponent fibre of the core-coating type composed of the polyester core and the copolyester coating of the count 5,3 dtex.
  • the layer 2 of nanofibres of surface weight 2 gm "2 is applied onto this layer of fibrous web ⁇ through electrostatic spinning. Onto a pair of layers ⁇ , 2 prepared in this way, from the side of layer 2 of nanofibres there is positioned another layer 3 of the carded fibrous web.
  • the basic fabric is then created according to Fig.
  • the sound absorptive fabric passes through the hot-air chamber at the temperature of circulating air of 140 0 C, through which the neighbouring layers are joined mutually.
  • This sound absorptive fabric may contain the layer 2 of nanofibres with surface weight in the range from 2 gm "2 to 0,1 gm "2 .
  • the Fig. 5 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres itself for the sound absorptive fabric according to the example 1 , at the same time the curve N1 expresses this dependence for the layer 2 of nanofibres with surface weight of 2 gm "2 , the curve N2 for the layer 2 of nanofibres with surface weight of 1 gm "2 , the curve N3 for the layer 2 of nanofibres with surface weight of 0,5 gm "2 , the curve N4 for the layer 2 of nanofibres with surface weight of 0,3 gm " 2 and the curve N5 for the layer 2 of nanofibres with surface weight of 0,1 gm "2 .
  • the curve P expresses this dependence for a fabric containing only a layer of carded fibrous web, i.e. without using the layer 2 of nanofibres. From the course of individual curves it is possible to select composition of sound absorptive fabric according to actual needs of the issue being solved.
  • the sound absorptive fabric shown in the Fig. 1 contains a layer % of carded fibrous web with the surface weight of 11 gm "2 produced on the carding machine of the bicomponent fibres of the core-coating type composed of the polyester core and the copolyester coating of the count 5,3 dtex.
  • the layer 2 of nanofibres with surface weight from 2 to 0,1 gm "2 is applied onto the layer I of fibrous web through electrostatic spinning, in the same manner as in the example
  • Fabric of these two layers i, 2 is after then formed through a cross laying into a sound absorptive fabric with a total thickness of 35 mm and surface weight of
  • the sound absorptive fabric is produced in the same manner as in example 1 , when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm "2 is applied on the basic layer i of carded fibrous web through the electrostatic spinning. On such a pair of layers i, 2 prepared in this manner, there is positioned another layer 3 of carded fibrous web from the side of the layer 2 of nanofibres.
  • the fabric is then created according to the Fig. 2 and consequently formed through the cross laying into the sound absorptive fabric with the total thickness of 35 mm and surface weight of 630 gm "2 , after which it is heat treated in the same manner as in the example 1.
  • the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres for the sound absorptive fabric according to the example 3 is shown in Fig. 7, at the same time the curve N1 expresses this dependence for the layer 2 of nanofibres with surface weight of 2 gm "2 , the curve N2 for layer 2 of nanofibres with surface weight of 1 gm "2 , the curve N3 for layer 2 of nanofibres with surface weight of 0,5 gm "2 , the curve N4 for layer 2 of nanofibres with surface weight of 0,3 gm "2 and the curve N5 for layer 2 of nanofibres with surface weight of 0,1 gm "2 .
  • the curve N1 expresses this dependence for the layer 2 of nanofibres with surface weight of 2 gm "2
  • the curve N2 for layer 2 of nanofibres with surface weight of 1 gm "2 the curve N3 for layer 2 of nanofibres with
  • P expresses this dependence for fabric containing a layer of carded fibrous web only, i.e. without usage of layer 2 of nanofibres.
  • the sound absorptive fabric is produced in the same manner as in example 1, when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm "2 is applied on the basic layer i of carded fibrous web through the electrostatic spinning. On such a pair of layers 1., 2 prepared in this manner, there are positioned another two layers 3 of carded fibrous web from the side of the layer 2 of nanofibres.
  • the fabric is then created according to Fig. 3.
  • the fabric created in this manner is further formed by means of cross laying into the sound absorptive fabric of the total thickness of 35 mm and the surface weight of 630 gm "2 .
  • the fabric created in this manner is subject to the heat treatment, the same as in the example 1.
  • the Fig. 8 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres itself for the sound absorptive fabric according to the example 4, at the same time the curve PP1 expresses this dependence for layer 2 of nanofibres with surface weight of 2 gm "2 , the curve PP2 for layer 2 of nanofibres with surface weight of 1 gm "2 , the curve PP3 for layer 2 of nanofibres with surface weight of 0,5 gm "2 , the curve PP4 for layer 2 of nanofibres with surface weight of 0,3 gm "2 and the curve PP5 for layer 2 of nanofibres with surface weight of 0,1 gm "2 .
  • Example 5 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres itself for the sound absorptive fabric according to the example 4, at the same time the curve PP1 expresses this dependence for layer 2 of nanof
  • the sound absorptive fabric is produced in the same manner as in example 1 , when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm "2 is applied on the basic layer ⁇ of carded fibrous web through the electrostatic spinning. On such a pair of layers I 1 , 2 prepared in this manner, there are positioned another three layers 3 of carded fibrous web from the side of the layer
  • the fabric is then created according to the Fig. 4.
  • the fabric created in this manner is further formed by means of cross laying into the sound absorptive fabric of the total thickness of 35 mm and with the surface weight of 630 gm "2 .
  • the fabric created in this manner is subject to the heat treatment, the same as in the example 1.
  • the Fig. 9 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres itself for fabric according to the example 5, at the same time the curve PPP2 expresses this dependence for layer 2 of nanofibres with surface weight of 1 gm " 2 , the curve PPP3 for layer 2 of nanofibres with surface weight of 0,5 gm "2 and the curve PPP4 for layer 2 of nanofibres with surface weight of 0,3 gm "2 .
  • the sound absorptive fabric is produced in the same manner as in example 1 , when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm "2 is applied on the basic layer 1 of carded fibrous web through the electrostatic spinning. On such a pair of layers I, 2 prepared in this manner, there are positioned another two layers 3 of carded fibrous web from the side of the layer 2 of nanofibres.
  • the fabric is then created according to the Fig. 3 and further formed by means of cross laying into the sound absorptive fabric of the total thickness of 35 mm and with the surface weight of 450 gm "2 , after which it is subject to the heat treatment, the same as in the example 1.
  • the Fig. 3 is then created according to the Fig. 3 and further formed by means of cross laying into the sound absorptive fabric of the total thickness of 35 mm and with the surface weight of 450 gm "2 , after which it is subject to the heat treatment, the same as in the example 1.
  • the curve PP1 expresses this dependence for layer 2 of nanofibres with surface weight of 2 gm "2 , the curve PP2 for layer 2 of nanofibres with surface weight of 1 gm "2 , the curve PP3 for layer 2 of nanofibres with surface weight of 0,5 gm "2 , the curve PP4 for layer 2 of nanofibres with surface weight of 0,3 gm "2 and the curve PP5 for layer 2 of nanofibres with surface weight of 0,1 gm "2 .
  • the sound absorptive fabric is produced in the same manner as in example 1 , when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm "2 is applied on the basic layer ⁇ of carded fibrous web through the electrostatic spinning. On such a pair of layers i, 2 prepared in this manner, there are positioned another three layers 3 of carded fibrous web from the side of the layer 2 of nanofibres.
  • the fabric is then created according to the Fig. 4.
  • the fabric is then created according to the Fig. 4 and further formed by means of cross laying into the sound absorptive fabric of the total thickness of 35 mm and with the surface weight of 450 gm "2 , after which it is subject to the heat treatment, in the same manner as in the example 1.
  • the Fig. 11 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 itself of nanofibres for the sound absorptive fabric according to the example 7, at the same time the curve PPP1 expresses this dependence for the layer 2 of nanofibres with surface weight of 2 gm "2 , the curve PPP2 for layer 2 of nanofibres with surface weight of 1 gm "2 , the curve PPP3 for layer 2 of nanofibres with surface weight of 0,5 gm "2 and the curve PPP4 for layer 2 of nanofibres with surface weight of 0,3 gm "2 .
  • the above mentioned examples of usage are illustrative only and the invention relates as well to the sound absorptive fabrics containing layers of carded fibrous web of other surface weights and/or composed from other fibres and also to other surface weights, selected as need may be, of nanofibre layers.
  • the invention is limited to the described number of layers of sound absorptive fabric.
  • the shown dependencies of coefficient of sound absorption capacity on sound frequency and the surface weight of the nanofibre layer itself prove a high sound absorption capacity of the fabric according to the invention, especially in the areas of 500 to 6000 Hz, when the coefficient of sound absorption capacity varies from 0,8 to nearly 1.
  • the invention is applicable especially at the producers of sound absorptive lining and components for automotive, aviation, building and machinery industry, and if compared with the present state of the art it considerably improves the hygiene of surroundings in the sphere of an undesired sound.

Abstract

The invention relates to the layered sound absorptive non-woven fabric containing the resonance membrane and at least one another layer (1, 3) of the fibrous material at which the resonance membrane is created by a layer (2) of nanofibres having diameter to 600 nanometers and of surface weight 0,1 to 5 g/m2, at the same time the resonance membrane together with at least one layer (1, 3) of fibrous material is formed by cross laying to the required thickness and surface weight.

Description

Layered sound absorptive non-woven fabric
Technical field
The invention relates to the layered sound absorptive non-woven fabric containing the resonance membrane and at least one another layer of fibrous material.
Background art
The sound absorptive materials are generally used in automotive, aviation, building as well as machinery industry. Their task is to provide for hygiene of surroundings from the point of view of undesired and harmful sound. The proposal itself of a suitable acoustic material is based on frequency area of an undesired sound in the given surroundings.
For absorbing of high frequency sound especially the porous materials are used which are nevertheless unsuitable for absorbing of sound of lower frequencies, this especially due to great material thickness needed. Such used materials include for example the melamine, polyurethane and metal foams or non-woven fabrics of mineral or polymeric fibres. Such materials are not so much suitable for absorbing of sound of lower frequencies, as a great material thickness is needed.
To absorb the low frequencies, especially the structures based on resonance principle are used, when through resonance of some elements the acoustic energy is being transferred into a thermal energy. Nevertheless these structures are absorbing the sounds at a certain low frequency, while for other frequencies its absorbing is very little. The combinations of perforated panel, absorptive material and possibly the air gaps are being used. The characteristics of perforated panel is given by number, diameter and arrangement of gaps.
The general objective is to combine the above mentioned characteristics into one acoustic system, which would be able to absorb both the sound of low as well as the sound of high frequencies. The layered sound absorptive material composed of one or several identical layers of fibres of diameter 0.05 to 5 micrometers obtained through splitting of the PVA foil is known from the JP 10251951 A. These fibres usually show a broad distribution of diameters, but only a very low percentage of these fibres may have the diameter under 1 micrometer. The data on sound absorption at low frequency, which shows a low efficiency of 10 percent also corresponds to this fact.
The layered sound absorptive material composed of several layers of non- woven fabric and several layers of polyester fibres of common diameters produced by means of the melt-blown method, through which the smallest diameter of fibres of about 1 micrometer may be achieved, is known from the JP 2003049351 A. The disadvantage is that this material is designated especially for absorbing of sound of medium frequencies, namely from 1000 to 4000 Hz.
The objective of the invention is to eliminate or at least to minimise the disadvantages of present state of the art and to create a fabric capable at low thickness to absorb both the low as well as the high frequencies of sound.
The principle of invention
The objective of the invention has been achieved by a layered sound absorptive non-woven fabric containing the resonance membrane and at least one another layer of fibrous material, whose principle consists in that the resonance membrane is formed by a layer of nanofibres of diameter to 600 nanometers and of surface weight 0,1 to 5 g/m2, when the resonance membrane together with at least one layer of fibrous material is formed by means of cross laying to the required thickness and surface weight.
At the same time it is advantageous if the layer of nanofibres is created through the electrostatic spinning of polymer solution, as such layer of nanofibres may be applied on the substrate layer of fibrous material during spinning, and joined with this layer consequently. The substrate layer of fibrous material is, according to the claim 3, with advantage created by at least one layer of carded fibrous web consisting of fibres having diameter of 10 to 45 micrometers and of surface weight of 5 to 100g/m2.
To increase the absorption capacity, the layer of nanofibres with a layer of carded fibrous web consisting of fibres having diameter of 10 to 45 micrometers and surface weight of 5 to 100g/m2 is joined on its each side.
The sound absorptive fabric according to the invention absorbs the sound at low frequencies and simultaneously it does not lose the ability of absorption capacity for the higher sound frequencies. Through this ability, which is based on the resonance effect of nanofibre layer damped in elastic manner by the substrate layer created with advantage by the carded fibrous web, it surpasses to date known materials.
Description of the drawing The examples of invention execution are schematically shown on the enclosed drawings, where the Fig. 1 shows the cross section of fabric made of carded fibrous web and a nanofibre layer, the Fig.2 the cross section of fabric made of carded fibrous web, a nanofibre layer and another layer of carded fibrous web, the Fig.3 shows the cross section of fabric made of layer of carded fibrous web, a nanofibre layer and a couple of another layers of carded fibrous web, the Fig. 4 the cross section of fabric made of layer of carded fibrous web, a nanonfibre layer and a trio of layers of carded fibrous web, the Fig. 5 to 11 show the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the nanofibre layer itself for examples 1 to 7.
Examples of embodiment
The layered sound absorptive non-woven fabric according to Fig. 1 contains the resonance membrane created by a layer 2 of nanofibres of diameter to 600 nanometers produced through electrostatic spinning and of surface weight of 0,1 to 5 g/m2 , and a layer 1. of carded fibrous web, when in the advantageous execution the layer ± of carded fibrous web creates the carrying layer to which during electrostatic spinning the layer 2 of produced nanofibres is deposited, after which both layers join together through a known way at a specified temperature in the hot-air chamber. At the sound absorptive fabric according to Fig. 2 on the fabric according to Fig. 1 there is applied another layer 3 of carded fibrous web, namely from the originally free side of the layer 2 of nanofibres. At the further executions, another layer 3 may be a double one - see the Fig. 3, or a triple one - see the Fig. 4.
To reach the suitable thickness and surface weight of the resulted sound absorptive non-woven fabric, it is advantageous if, after creating the fabric of individual layers according to Fig. 1 to 4, this fabric is formed by means of cross laying to the required thickness and to the required surface weight.
The layer 2 of nanofibres fulfils the function of acoustic resonance membrane vibrating at the low frequency. This character is given by the nano- dimensions of space among the fibres. If a sound wave falls to the acoustic resonance membrane, it brings it to the forced vibration, whose amplitude is maximum in case of resonance, simultaneously the neighbouring layers 1, 3 of carded fibrous web provide for a sufficient damping of the vibrating membrane, at the same time the maximum quantity of the sound energy gathered in the resonator is transferred into a heat. The layer i and/or 3 of the carded fibrous web provides not only for a sufficient damping of vibrating membrane created by a layer 2 of nanofibres, but also absorbs the sounds of higher frequencies. The above mentioned layers 1, 2, 3 are at the same time associated into one resonance system through laying of individual layers ±, 2, 3 one on another and through their joining for example in the hot-air bonding chamber. Through this laying of resonance elements, such a material is being produced which, thanks to the resonance membrane created by the layer 2 of nanofibres, absorbs the sound of low frequencies and simultaneously through the layer X and/or 3 of the carded fibrous web, also the sound of higher frequencies. The fabric according to the invention reaches high values of coefficient of sound absorption capacity for the sounds of low as well as of high frequency, simultaneously it is possible to adjust the material thickness and possibly its surface weight to various requirements.
The particular examples of execution of sound absorptive fabrics according to the invention are described lower.
Example 1
The sound absorptive fabric contains a layer I of carded fibrous web of surface weight of 11 gm"2 produced on the carding machine of the bicomponent fibre of the core-coating type composed of the polyester core and the copolyester coating of the count 5,3 dtex. The layer 2 of nanofibres of surface weight 2 gm"2 is applied onto this layer of fibrous web ± through electrostatic spinning. Onto a pair of layers ±, 2 prepared in this way, from the side of layer 2 of nanofibres there is positioned another layer 3 of the carded fibrous web. The basic fabric is then created according to Fig. 2 and consequently formed by means of cross laying into the sound absorptive fabric of total thickness of 25 mm and surface weight of 630gm~2. The sound absorptive fabric passes through the hot-air chamber at the temperature of circulating air of 140 0C, through which the neighbouring layers are joined mutually. This sound absorptive fabric may contain the layer 2 of nanofibres with surface weight in the range from 2 gm"2 to 0,1 gm"2.
The Fig. 5 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres itself for the sound absorptive fabric according to the example 1 , at the same time the curve N1 expresses this dependence for the layer 2 of nanofibres with surface weight of 2 gm"2, the curve N2 for the layer 2 of nanofibres with surface weight of 1 gm"2, the curve N3 for the layer 2 of nanofibres with surface weight of 0,5 gm"2, the curve N4 for the layer 2 of nanofibres with surface weight of 0,3 gm" 2 and the curve N5 for the layer 2 of nanofibres with surface weight of 0,1 gm"2. The curve P expresses this dependence for a fabric containing only a layer of carded fibrous web, i.e. without using the layer 2 of nanofibres. From the course of individual curves it is possible to select composition of sound absorptive fabric according to actual needs of the issue being solved. Example 2
The sound absorptive fabric shown in the Fig. 1 contains a layer % of carded fibrous web with the surface weight of 11 gm"2 produced on the carding machine of the bicomponent fibres of the core-coating type composed of the polyester core and the copolyester coating of the count 5,3 dtex. The layer 2 of nanofibres with surface weight from 2 to 0,1 gm"2 is applied onto the layer I of fibrous web through electrostatic spinning, in the same manner as in the example
1. Fabric of these two layers i, 2 is after then formed through a cross laying into a sound absorptive fabric with a total thickness of 35 mm and surface weight of
630 gm"2, after which it is heat treated in the same manner as in the example 1 , through which the neighbouring layers are joined.
The dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres itself for the fabric according to the example 2 is shown in Fig. 6, at the same time the curve J3 expresses this dependence for layer 2 of nanofibres with surface weight of 0,5 gm"2, the curve J4 for layer 2 of nanofibres with surface weight of 0,3 gm"2 and the curve J5 for the layer 2 of nanofibres with surface weight of 0,1 gm"2.
Example 3
The sound absorptive fabric is produced in the same manner as in example 1 , when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm"2 is applied on the basic layer i of carded fibrous web through the electrostatic spinning. On such a pair of layers i, 2 prepared in this manner, there is positioned another layer 3 of carded fibrous web from the side of the layer 2 of nanofibres. The fabric is then created according to the Fig. 2 and consequently formed through the cross laying into the sound absorptive fabric with the total thickness of 35 mm and surface weight of 630 gm"2, after which it is heat treated in the same manner as in the example 1. The dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres for the sound absorptive fabric according to the example 3 is shown in Fig. 7, at the same time the curve N1 expresses this dependence for the layer 2 of nanofibres with surface weight of 2 gm"2, the curve N2 for layer 2 of nanofibres with surface weight of 1 gm"2, the curve N3 for layer 2 of nanofibres with surface weight of 0,5 gm"2, the curve N4 for layer 2 of nanofibres with surface weight of 0,3 gm"2 and the curve N5 for layer 2 of nanofibres with surface weight of 0,1 gm"2. The curve
P expresses this dependence for fabric containing a layer of carded fibrous web only, i.e. without usage of layer 2 of nanofibres.
Example 4
The sound absorptive fabric is produced in the same manner as in example 1, when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm"2 is applied on the basic layer i of carded fibrous web through the electrostatic spinning. On such a pair of layers 1., 2 prepared in this manner, there are positioned another two layers 3 of carded fibrous web from the side of the layer 2 of nanofibres. The fabric is then created according to Fig. 3. The fabric created in this manner is further formed by means of cross laying into the sound absorptive fabric of the total thickness of 35 mm and the surface weight of 630 gm"2. The fabric created in this manner is subject to the heat treatment, the same as in the example 1.
The Fig. 8 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres itself for the sound absorptive fabric according to the example 4, at the same time the curve PP1 expresses this dependence for layer 2 of nanofibres with surface weight of 2 gm"2, the curve PP2 for layer 2 of nanofibres with surface weight of 1 gm"2, the curve PP3 for layer 2 of nanofibres with surface weight of 0,5 gm"2, the curve PP4 for layer 2 of nanofibres with surface weight of 0,3 gm"2 and the curve PP5 for layer 2 of nanofibres with surface weight of 0,1 gm"2. Example 5
The sound absorptive fabric is produced in the same manner as in example 1 , when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm"2 is applied on the basic layer ± of carded fibrous web through the electrostatic spinning. On such a pair of layers I1, 2 prepared in this manner, there are positioned another three layers 3 of carded fibrous web from the side of the layer
2 of nanofibres. The fabric is then created according to the Fig. 4. The fabric created in this manner is further formed by means of cross laying into the sound absorptive fabric of the total thickness of 35 mm and with the surface weight of 630 gm"2. The fabric created in this manner is subject to the heat treatment, the same as in the example 1.
The Fig. 9 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 of nanofibres itself for fabric according to the example 5, at the same time the curve PPP2 expresses this dependence for layer 2 of nanofibres with surface weight of 1 gm" 2, the curve PPP3 for layer 2 of nanofibres with surface weight of 0,5 gm"2 and the curve PPP4 for layer 2 of nanofibres with surface weight of 0,3 gm"2.
Example 6
The sound absorptive fabric is produced in the same manner as in example 1 , when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm"2 is applied on the basic layer 1 of carded fibrous web through the electrostatic spinning. On such a pair of layers I, 2 prepared in this manner, there are positioned another two layers 3 of carded fibrous web from the side of the layer 2 of nanofibres. The fabric is then created according to the Fig. 3 and further formed by means of cross laying into the sound absorptive fabric of the total thickness of 35 mm and with the surface weight of 450 gm"2, after which it is subject to the heat treatment, the same as in the example 1. The Fig. 10 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 itself of nanofibres for the sound absorptive fabric according to the example 6, at the same time the curve PP1 expresses this dependence for layer 2 of nanofibres with surface weight of 2 gm"2, the curve PP2 for layer 2 of nanofibres with surface weight of 1 gm"2, the curve PP3 for layer 2 of nanofibres with surface weight of 0,5 gm"2, the curve PP4 for layer 2 of nanofibres with surface weight of 0,3 gm"2 and the curve PP5 for layer 2 of nanofibres with surface weight of 0,1 gm"2.
Example 7
The sound absorptive fabric is produced in the same manner as in example 1 , when the layer 2 of nanofibres with surface weight from 2 to 0,1 gm"2 is applied on the basic layer ± of carded fibrous web through the electrostatic spinning. On such a pair of layers i, 2 prepared in this manner, there are positioned another three layers 3 of carded fibrous web from the side of the layer 2 of nanofibres. The fabric is then created according to the Fig. 4. The fabric is then created according to the Fig. 4 and further formed by means of cross laying into the sound absorptive fabric of the total thickness of 35 mm and with the surface weight of 450 gm"2, after which it is subject to the heat treatment, in the same manner as in the example 1.
The Fig. 11 shows the dependence of coefficient of sound absorption capacity on the sound frequency and surface weight of the layer 2 itself of nanofibres for the sound absorptive fabric according to the example 7, at the same time the curve PPP1 expresses this dependence for the layer 2 of nanofibres with surface weight of 2 gm"2, the curve PPP2 for layer 2 of nanofibres with surface weight of 1 gm"2, the curve PPP3 for layer 2 of nanofibres with surface weight of 0,5 gm"2 and the curve PPP4 for layer 2 of nanofibres with surface weight of 0,3 gm"2.
The above mentioned examples of usage are illustrative only and the invention relates as well to the sound absorptive fabrics containing layers of carded fibrous web of other surface weights and/or composed from other fibres and also to other surface weights, selected as need may be, of nanofibre layers. In no way the invention is limited to the described number of layers of sound absorptive fabric. The shown dependencies of coefficient of sound absorption capacity on sound frequency and the surface weight of the nanofibre layer itself prove a high sound absorption capacity of the fabric according to the invention, especially in the areas of 500 to 6000 Hz, when the coefficient of sound absorption capacity varies from 0,8 to nearly 1.
Industrial applicability
The invention is applicable especially at the producers of sound absorptive lining and components for automotive, aviation, building and machinery industry, and if compared with the present state of the art it considerably improves the hygiene of surroundings in the sphere of an undesired sound.

Claims

1. The layered sound absorptive non-woven fabric containing the resonance membrane and at least one another layer of fibrous material, characterised by that the resonance membrane is created by a layer (2) of nanofibres of diameter to 600 nanometers and of surface weight 0,1 to 5 g/m2, at the same time the resonance membrane, together with another at least one layer (1, 3) of the fibrous material, is formed by means of cross laying to the required thickness and to the surface weight.
2. The layered sound absorptive fabric according to the claim 1, characterised by that the layer (2) of nanofibres is created through electrostatic spinning of polymer solution.
3. The layered sound absorptive fabric according to the claim 2, characterised by that the layer (2) of nanofibres is joined together with at least one layer (1, 3) of carded fibrous web composed of fibres having diameter of 10 to 45 micrometers and of the surface weight 5 to 100g/m2.
4. The layered sound absorptive fabric according to the claim 3, characterised by that the layer (2) of nanofibres is joined on its each side with a layer (1 , 3) of carded fibrous web created by fibres having diameter of 10 to 45 micrometers and of surface weight 5 to 100g/m2.
PCT/CZ2006/000017 2005-04-11 2006-04-10 Layered sound absorptive non-woven fabric WO2006108363A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EA200702133A EA011173B1 (en) 2005-04-11 2006-04-10 Layered sound absorptive woven fabric
AU2006233442A AU2006233442A1 (en) 2005-04-11 2006-04-10 Layered sound absorptive non-woven fabric
CA002601813A CA2601813A1 (en) 2005-04-11 2006-04-10 Layered sound absorptive non-woven fabric
JP2008505720A JP2008537798A (en) 2005-04-11 2006-04-10 Laminated sound-absorbing nonwoven fabric
EP06722444A EP1869239A2 (en) 2005-04-11 2006-04-10 Layered sound absorptive non-woven fabric
US11/911,135 US20080173497A1 (en) 2005-04-11 2006-04-10 Layered Sound Absorptive Non-Woven Fabric

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CZ20050226A CZ2005226A3 (en) 2005-04-11 2005-04-11 Bonded sound-absorbing non-woven fabric
CZPV2005-226 2005-04-11

Publications (3)

Publication Number Publication Date
WO2006108363A2 true WO2006108363A2 (en) 2006-10-19
WO2006108363A3 WO2006108363A3 (en) 2006-11-30
WO2006108363B1 WO2006108363B1 (en) 2007-01-11

Family

ID=36698795

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CZ2006/000017 WO2006108363A2 (en) 2005-04-11 2006-04-10 Layered sound absorptive non-woven fabric

Country Status (12)

Country Link
US (1) US20080173497A1 (en)
EP (1) EP1869239A2 (en)
JP (1) JP2008537798A (en)
KR (1) KR20080004481A (en)
CN (1) CN101189381A (en)
AU (1) AU2006233442A1 (en)
CA (1) CA2601813A1 (en)
CZ (1) CZ2005226A3 (en)
EA (1) EA011173B1 (en)
TW (1) TW200706356A (en)
UA (1) UA89533C2 (en)
WO (1) WO2006108363A2 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1900863A1 (en) 2006-09-15 2008-03-19 Asselin-Thibeau Process and installation for manufacturing a textile comprising inner layers and device relating to the same
WO2008083637A1 (en) * 2007-01-11 2008-07-17 Elmarco, S.R.O. Production method of layered sound absorptive non-woven fabric
DE102008025840A1 (en) 2008-05-29 2009-12-03 Volkswagen Ag Device for sound absorption and sound damping, has resonance absorber fleece, where each layer consists of acoustically transparent knitting fleece
US7815427B2 (en) 2007-11-20 2010-10-19 Clarcor, Inc. Apparatus and method for reducing solvent loss for electro-spinning of fine fibers
US7967588B2 (en) 2007-11-20 2011-06-28 Clarcor Inc. Fine fiber electro-spinning equipment, filter media systems and methods
US8496088B2 (en) 2011-11-09 2013-07-30 Milliken & Company Acoustic composite
WO2014111068A2 (en) 2013-01-18 2014-07-24 Technicka Univerzita V Liberci A sound absorbing means containing at least one cavity resonator
WO2014111067A2 (en) 2013-01-18 2014-07-24 Technicka Univerzita V Liberci A sound absorptive element comprising at least one acoustic resonance membrane formed by a layer of polymeric nanofibers
US9101860B2 (en) 2007-11-20 2015-08-11 Clarcor Inc. Filtration medias, fine fibers under 100 nanometers, and methods
US9186608B2 (en) 2012-09-26 2015-11-17 Milliken & Company Process for forming a high efficiency nanofiber filter
US9731966B2 (en) 2010-02-26 2017-08-15 Clarcor Inc. Non-pleated tubular depth filter having fine fiber filtration media
CN110249381A (en) * 2017-02-03 2019-09-17 捷恩智株式会社 Stacking sound-absorbing material comprising superfine fibre

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7757811B2 (en) * 2005-10-19 2010-07-20 3M Innovative Properties Company Multilayer articles having acoustical absorbance properties and methods of making and using the same
JP4635847B2 (en) * 2005-11-30 2011-02-23 トヨタ紡織株式会社 Soundproof material
JP5390245B2 (en) * 2009-04-17 2014-01-15 帝人株式会社 Sound absorbing material and sound absorbing composite material
US8974198B2 (en) 2009-08-10 2015-03-10 Emerson Climate Technologies, Inc. Compressor having counterweight cover
CN101807394A (en) * 2010-04-13 2010-08-18 王艳 Micro-nano-fiber composite layered sound-absorbing material
US9153225B2 (en) 2011-12-16 2015-10-06 Emerson Climate Technologies, Inc. Sound enclosure for enclosing a compressor assembly
JP5876381B2 (en) * 2012-06-21 2016-03-02 名古屋油化株式会社 Sound insulation material
US11015272B2 (en) 2015-03-12 2021-05-25 Toray Industries, Inc Laminated nonwoven fabric
DE102015209105A1 (en) * 2015-05-19 2016-11-24 Hp Pelzer Holding Gmbh Light acoustic component
US10814966B2 (en) 2015-05-25 2020-10-27 Dotterel Technologies Limited Shroud for an aircraft
CN107408379A (en) * 2015-07-08 2017-11-28 名古屋油化株式会社 Surface layer material tablet and its manufacture method and sound-absorbing material
US10540952B2 (en) * 2016-03-30 2020-01-21 Maryam Mohammadi Gojani Sound absorbing structure including nanofibers
CN106048885B (en) * 2016-06-28 2018-06-19 华南理工大学 A kind of cellulose fiber peacekeeping nanofiber composite sound isolating material and preparation method thereof
CN106149197B (en) * 2016-06-28 2018-10-09 华南理工大学 A kind of hybrid structure biodegradable composite sound isolating material and preparation method thereof
US11351751B2 (en) * 2016-10-21 2022-06-07 Board Of Regents, The University Of Texas System Noise-absorbent and odor-adsorbent fabric cover systems for vehicle interiors
JP6856888B2 (en) * 2017-03-30 2021-04-14 Jnc株式会社 Laminated sound absorbing material containing ultrafine fibers
WO2019022618A1 (en) 2017-07-24 2019-01-31 Dotterel Technologies Limited Shroud
US10845307B2 (en) 2017-08-21 2020-11-24 Saudi Arabian Oil Company Determining composition of a sample
US10845306B2 (en) 2017-08-21 2020-11-24 Saudi Arabian Oil Company Determining composition of a sample
JP2019111714A (en) 2017-12-22 2019-07-11 Jnc株式会社 Laminate sound absorber
JP6660035B2 (en) 2018-03-08 2020-03-04 Jnc株式会社 Laminated sound absorbing material
CN108859362B (en) * 2018-05-25 2021-01-01 南通大学 Multilayer broadband sound absorption and insulation material and preparation method thereof
JP6642811B2 (en) 2018-08-02 2020-02-12 Jnc株式会社 Laminated sound absorbing material
CN111300919A (en) * 2020-03-05 2020-06-19 无锡吉兴汽车声学部件科技有限公司 Sound absorption interior trim and application thereof
US11958308B1 (en) 2023-05-31 2024-04-16 G13 Innovation In Production Ltd Thermal paper, and methods and systems for forming the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040092185A1 (en) * 2002-11-13 2004-05-13 Grafe Timothy H. Wipe material with nanofiber layer
WO2004112937A1 (en) * 2003-06-19 2004-12-29 Donaldson Company, Inc. Cleanable high efficiency filter media structure and applications for use

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997013020A1 (en) * 1995-10-06 1997-04-10 Nippon Petrochemicals Company, Limited Water jet intertwined nonwoven cloth and method of manufacturing the same
ZA200601215B (en) * 2003-08-25 2007-05-30 Takayasu Co Ltd Sound absorbing material
MXPA06011347A (en) * 2004-04-19 2006-12-15 Procter & Gamble Articles containing nanofibers for use as barriers.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040092185A1 (en) * 2002-11-13 2004-05-13 Grafe Timothy H. Wipe material with nanofiber layer
WO2004112937A1 (en) * 2003-06-19 2004-12-29 Donaldson Company, Inc. Cleanable high efficiency filter media structure and applications for use

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2905956A1 (en) * 2006-09-15 2008-03-21 Asselin Thibeau Soc Par Action METHOD AND INSTALLATION FOR MANUFACTURING TEXTILE COMPRISING INTERLAYERS, AND DEVICE THEREFOR.
EP1900863A1 (en) 2006-09-15 2008-03-19 Asselin-Thibeau Process and installation for manufacturing a textile comprising inner layers and device relating to the same
WO2008083637A1 (en) * 2007-01-11 2008-07-17 Elmarco, S.R.O. Production method of layered sound absorptive non-woven fabric
US9101860B2 (en) 2007-11-20 2015-08-11 Clarcor Inc. Filtration medias, fine fibers under 100 nanometers, and methods
US7815427B2 (en) 2007-11-20 2010-10-19 Clarcor, Inc. Apparatus and method for reducing solvent loss for electro-spinning of fine fibers
US7967588B2 (en) 2007-11-20 2011-06-28 Clarcor Inc. Fine fiber electro-spinning equipment, filter media systems and methods
US8366986B2 (en) 2007-11-20 2013-02-05 Clarcor Inc. Fine fiber electro-spinning equipment, filter media systems and methods
DE102008025840A1 (en) 2008-05-29 2009-12-03 Volkswagen Ag Device for sound absorption and sound damping, has resonance absorber fleece, where each layer consists of acoustically transparent knitting fleece
US9731966B2 (en) 2010-02-26 2017-08-15 Clarcor Inc. Non-pleated tubular depth filter having fine fiber filtration media
US8496088B2 (en) 2011-11-09 2013-07-30 Milliken & Company Acoustic composite
US9186608B2 (en) 2012-09-26 2015-11-17 Milliken & Company Process for forming a high efficiency nanofiber filter
WO2014111067A2 (en) 2013-01-18 2014-07-24 Technicka Univerzita V Liberci A sound absorptive element comprising at least one acoustic resonance membrane formed by a layer of polymeric nanofibers
WO2014111068A2 (en) 2013-01-18 2014-07-24 Technicka Univerzita V Liberci A sound absorbing means containing at least one cavity resonator
EP2875506B1 (en) * 2013-01-18 2021-11-10 Technicka Univerzita v Liberci A sound absorbing means containing at least one cavity resonator
CN110249381A (en) * 2017-02-03 2019-09-17 捷恩智株式会社 Stacking sound-absorbing material comprising superfine fibre
EP3579224A4 (en) * 2017-02-03 2020-12-09 JNC Corporation Laminate sound-absorbing material including ultrafine fiber

Also Published As

Publication number Publication date
JP2008537798A (en) 2008-09-25
CA2601813A1 (en) 2006-10-19
CN101189381A (en) 2008-05-28
CZ2005226A3 (en) 2006-11-15
EA200702133A1 (en) 2008-02-28
WO2006108363A3 (en) 2006-11-30
AU2006233442A1 (en) 2006-10-19
WO2006108363B1 (en) 2007-01-11
TW200706356A (en) 2007-02-16
KR20080004481A (en) 2008-01-09
EP1869239A2 (en) 2007-12-26
EA011173B1 (en) 2009-02-27
UA89533C2 (en) 2010-02-10
US20080173497A1 (en) 2008-07-24

Similar Documents

Publication Publication Date Title
WO2006108363A2 (en) Layered sound absorptive non-woven fabric
Tang et al. Acoustic energy absorption properties of fibrous materials: A review
Amares et al. A review: characteristics of noise absorption material
Yilmaz et al. Effects of porosity, fiber size, and layering sequence on sound absorption performance of needle‐punched nonwovens
RU2639594C2 (en) Multilayer perforated sound absorber
Rabbi et al. Manufacturing of PAN or PU nanofiber layers/PET nonwoven composite as highly effective sound absorbers
CZ304657B6 (en) Sound absorbing means containing at least one hollow-space resonator
KR20180106976A (en) Sound-absorbing textile composite
Çelikel et al. Effect of bicomponent fibers on sound absorption properties of multilayer nonwovens
Memon et al. Considerations while designing acoustic home textiles: A review
JP2009287143A (en) Sound-absorbing material and method for producing the same
Patnaik Materials used for acoustic textiles
EP2875507B1 (en) A sound absorptive element comprising at least one acoustic resonance membrane formed by a layer of polymeric nanofibers
Tascan et al. Effect of glass-beads on sound insulation properties of nonwoven fabrics
JP2001316961A (en) Sound-absorbing structural body
JP2019086551A (en) Sound absorption material
JP7194192B2 (en) Non-woven fabric for soundproofing
RU2607482C1 (en) Barrier for spindles of a textile machine
WO2020116399A1 (en) Method for controlling sound absorbing characteristic of soundproof material
CN112334678A (en) Multilayer damping material
JP2008231596A (en) Fiber structure having excellent sound absorbency
EP4316798A1 (en) Sound-absorbing material and method of making such a sound-absorbing material
Yilmaz et al. Biocomposite Structures as Sound Absorber Materials
CN107635831B (en) Fire wall
JP7450538B2 (en) soundproofing material

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2006233442

Country of ref document: AU

WWE Wipo information: entry into national phase

Ref document number: 2601813

Country of ref document: CA

WWE Wipo information: entry into national phase

Ref document number: 2006722444

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 1020077022779

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 200680011484.3

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 11911135

Country of ref document: US

Ref document number: 2008505720

Country of ref document: JP

ENP Entry into the national phase

Ref document number: 2006233442

Country of ref document: AU

Date of ref document: 20060410

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 4517/CHENP/2007

Country of ref document: IN

WWP Wipo information: published in national office

Ref document number: 2006233442

Country of ref document: AU

NENP Non-entry into the national phase

Ref country code: DE

WWW Wipo information: withdrawn in national office

Ref document number: DE

NENP Non-entry into the national phase

Ref country code: RU

WWW Wipo information: withdrawn in national office

Ref document number: RU

WWE Wipo information: entry into national phase

Ref document number: 200702133

Country of ref document: EA

WWP Wipo information: published in national office

Ref document number: 2006722444

Country of ref document: EP