CA1315080C - Wet/dry wipes - Google Patents
Wet/dry wipesInfo
- Publication number
- CA1315080C CA1315080C CA 585970 CA585970A CA1315080C CA 1315080 C CA1315080 C CA 1315080C CA 585970 CA585970 CA 585970 CA 585970 A CA585970 A CA 585970A CA 1315080 C CA1315080 C CA 1315080C
- Authority
- CA
- Canada
- Prior art keywords
- fiber
- facing
- wet
- webs
- components
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
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
- B32B5/22—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
-
- 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
- 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
- B32B2262/0253—Polyolefin 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
- B32B2262/04—Cellulosic plastic fibres, e.g. rayon
-
- 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
- B32B2307/70—Other properties
- B32B2307/728—Hydrophilic
-
- 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
- B32B2307/70—Other properties
- B32B2307/73—Hydrophobic
-
- 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
- B32B2432/00—Cleaning articles, e.g. mops, wipes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
- Y10T442/60—Nonwoven fabric [i.e., nonwoven strand or fiber material]
- Y10T442/608—Including strand or fiber material which is of specific structural definition
Abstract
0660p Harrington Case 1 WET/DRY WIPES
Abstract of Disclosure A wipe material capable of retaining opposed wet and dry facings characterized by (A) a wet facing comprising one or more fiber- or fiber-like-web(s) having hydrophilic/ hydro-phobic component blends of indicated wt. % ranges and denier and (B) a dry facing comprising one or more fiber- or fiber-like-webs containing one or more hydrophobic components of mixed denier not exceeding a given denier; and a method for obtaining the same.
Abstract of Disclosure A wipe material capable of retaining opposed wet and dry facings characterized by (A) a wet facing comprising one or more fiber- or fiber-like-web(s) having hydrophilic/ hydro-phobic component blends of indicated wt. % ranges and denier and (B) a dry facing comprising one or more fiber- or fiber-like-webs containing one or more hydrophobic components of mixed denier not exceeding a given denier; and a method for obtaining the same.
Description
0~60p This invention is directed to a class of nonwoven wipe materials which retain separate wet and dry faces, and are individually capable of carrying out sequential wet and dry wiping steps.
The use of low cost composites of fiber webs to form disposable wipes for dusting, polishing and minor household cleanup projects involving dry wipe or wet wipe activity, is well known and widely accepted by the public. Such wipes are commonly commercialized in the form of napkins, roll toweling, disposable handkerchiefs and the like.
It is found, however, that smearing often occurs when carrying out individual projects involving both wet and dry wipe activities unless several wipes are utilized to complete the job. In effect, moqt art-recognized wipes are individ-ually unsuitable for accomplishing wet and dry wipe opera-tions in sequence without smearing and/or structural failure.
A typical example of such practical dual use might involve, for instance, cleaning up wet dumped soil from a potted plant or carrying out heavy dusting of a glass top table surface on which several wet spills have been left. In :
.
The use of low cost composites of fiber webs to form disposable wipes for dusting, polishing and minor household cleanup projects involving dry wipe or wet wipe activity, is well known and widely accepted by the public. Such wipes are commonly commercialized in the form of napkins, roll toweling, disposable handkerchiefs and the like.
It is found, however, that smearing often occurs when carrying out individual projects involving both wet and dry wipe activities unless several wipes are utilized to complete the job. In effect, moqt art-recognized wipes are individ-ually unsuitable for accomplishing wet and dry wipe opera-tions in sequence without smearing and/or structural failure.
A typical example of such practical dual use might involve, for instance, cleaning up wet dumped soil from a potted plant or carrying out heavy dusting of a glass top table surface on which several wet spills have been left. In :
.
- 2 ~ 8~
both situations at least one and often several additional wipes are required to accomplish the job.
It is an object of the present invention to increase the efficiency and versatility of wipe~.
It is a further object of the instant invention to pro-mote separate wet and dry facings on opposite sides of a single disposable nonwoven wipe or towel (hereafter "wipe").
It is a still further object of the present invention to obtain a durable wipe suitable for sequential wet and dry cleaning operations.
Wipe material capable of realizing the above objects is - obtained by bonding together (A) a wet facing consisting es-sentially of one or more externally positioned and internally positioned fiber- or fiber-like-web, preferably up to about 4 webs, of blended hydrophilic/hydrophobic components totaling about 50-90/50-lO wt. % and preferably 50-75/50-25 wt. %
respectively, based on total web weight for the wet facing, the hydrophilic component of each web of the wet facing having a denier within a range of about 0.5-2.0 dpf, and the hydrophobic component of each web of the wet facing having a denier not exceeding about 6 dpf, and preferably about 0.5-6 dpf; wherein (a) the externally positioned web of the wet facing contains not less than about 60 wt. % of the hydro-philic component, and fiber- or fiber-like-components thereof are of about the same denier; and (b) the internally-posi-... ,, . ~
-' 131~8~
both situations at least one and often several additional wipes are required to accomplish the job.
It is an object of the present invention to increase the efficiency and versatility of wipe~.
It is a further object of the instant invention to pro-mote separate wet and dry facings on opposite sides of a single disposable nonwoven wipe or towel (hereafter "wipe").
It is a still further object of the present invention to obtain a durable wipe suitable for sequential wet and dry cleaning operations.
Wipe material capable of realizing the above objects is - obtained by bonding together (A) a wet facing consisting es-sentially of one or more externally positioned and internally positioned fiber- or fiber-like-web, preferably up to about 4 webs, of blended hydrophilic/hydrophobic components totaling about 50-90/50-lO wt. % and preferably 50-75/50-25 wt. %
respectively, based on total web weight for the wet facing, the hydrophilic component of each web of the wet facing having a denier within a range of about 0.5-2.0 dpf, and the hydrophobic component of each web of the wet facing having a denier not exceeding about 6 dpf, and preferably about 0.5-6 dpf; wherein (a) the externally positioned web of the wet facing contains not less than about 60 wt. % of the hydro-philic component, and fiber- or fiber-like-components thereof are of about the same denier; and (b) the internally-posi-... ,, . ~
-' 131~8~
tioned web(s~ of the wet faclng contaln flber- or flber-llke~
components of mlxed denler, partlcularly, although not exclusively, favoring lncreased dlfferences ln denler between flbers as one approaches the center of the wlpe~ with (B) a dry faclng of one or more webs comprlslng one or more hydrophoblc flber- or flber-llke-components of mlxed denier not exceedlng about 6 dpf and preferably wlthln the range of about 0.5-6 dpf.
For present purposes the above-defined wet (A) and dry (B) faclngs are usefully bonded together from one or more webs of flber and/or flbrillated fllms of carded and/or prebonded web comblnatlons, using art-recognlzed nonwoven bondlng technlques such as thermal, sonlc, and/or pressure-bondlng technlques or equlvalent techniques known to the art, and may be embossed and prlnted conventlonally wlth varlous deslgns and colors, as deslred, to lncrease loft, wlpe strength and for easy re~ognltlon of the wet and dry sldes of the wlpe for functlonal purposes.
Wlpes wlthin the scope of the present lnventlon are further convenlently represented schematlcally ln Flgure 1.
Flgure 1 contalns three dlagrams, (dlagrams I-III), that represent cut away cross sectlons of lndlvldual wlpes comprlslng 2-7 webs of flber- or flber-llke-components (whlch are not drawn to scalet.
The "A" slde denotes the wet faclng slde and the "B" slde denotes the dry faclng slde of each wlpe as above noted.
For present purposes the "A" wet faclng slde, convenlently, although not excluslvely, comprlses about 1-4 webs of blended hydrophlllc/hydrophoblc components, the webs of thls facing belng represented lndlvldually ln Flgure 1 ln dlagrams I-III as C, C', C" and C'", whlle the "B" dry faclng, ls " ,~.
, , , . . .. , ; .
. . .
' ; ', ~ - ' :
: ~ ' '. .
~ 13~8~
components of mlxed denler, partlcularly, although not exclusively, favoring lncreased dlfferences ln denler between flbers as one approaches the center of the wlpe~ with (B) a dry faclng of one or more webs comprlslng one or more hydrophoblc flber- or flber-llke-components of mlxed denier not exceedlng about 6 dpf and preferably wlthln the range of about 0.5-6 dpf.
For present purposes the above-defined wet (A) and dry (B) faclngs are usefully bonded together from one or more webs of flber and/or flbrillated fllms of carded and/or prebonded web comblnatlons, using art-recognlzed nonwoven bondlng technlques such as thermal, sonlc, and/or pressure-bondlng technlques or equlvalent techniques known to the art, and may be embossed and prlnted conventlonally wlth varlous deslgns and colors, as deslred, to lncrease loft, wlpe strength and for easy re~ognltlon of the wet and dry sldes of the wlpe for functlonal purposes.
Wlpes wlthin the scope of the present lnventlon are further convenlently represented schematlcally ln Flgure 1.
Flgure 1 contalns three dlagrams, (dlagrams I-III), that represent cut away cross sectlons of lndlvldual wlpes comprlslng 2-7 webs of flber- or flber-llke-components (whlch are not drawn to scalet.
The "A" slde denotes the wet faclng slde and the "B" slde denotes the dry faclng slde of each wlpe as above noted.
For present purposes the "A" wet faclng slde, convenlently, although not excluslvely, comprlses about 1-4 webs of blended hydrophlllc/hydrophoblc components, the webs of thls facing belng represented lndlvldually ln Flgure 1 ln dlagrams I-III as C, C', C" and C'", whlle the "B" dry faclng, ls " ,~.
, , , . . .. , ; .
. . .
' ; ', ~ - ' :
: ~ ' '. .
~ 13~8~
nonexclusively represented as 1-3 webs, ldentlfied ln the dlagrams as D, D' and D".
For purposes of the instant lnvention, the wlpes represented by Flgure 1 are also dlfferentiated as "lnternally-posltloned fiber- or flber-like-webs" demonstrated by C' and D' of diagram II and C', C", C"', D", D' of _ 5 - ~3~
diagram III, and as "externally-positioned fiber- or fiber-like-web" represented by C and D in diagrams II-III.
The ahove differentiation can also be duplicated, as desired, within components C and D of diagram 1, in which individual web laminates of Diagram II and III are replaced by sequential application of thin layers of unbonded, un-crimped or slightly crimped fiber blends (not shown) of one or more of the above-indicated types and sequences, followed by a bonding step. Generally speaking, the later arrangement is best suited for light weight wipes and easy clean up jobs.
In either case, an externally-positioned web of a wet facing (i.e. C) should favor a high wt. % of hydrophilic com-ponent of not less than about 60 wt. ~, and preferably 90-100%, with a homogeneous or relatively small difference in fiber denier within the web, while corresponding internally-positioned webs (i.e. C', C", C"', of diagrams II and III) should favor a sufficient increase in hydrophobic fiber to meet the above-indicated 50-90/50-10 wt. ~ total and a grad-ùally increasing difference in fiber denier within each web blend as one approaches the center of the wipe.
Particularly favored as blended hydrophilic/hydrophobic components for wet facing webs C, C', C", C"' of the instant invention are rayon/polyolefin, nylon/polyolefin, cotton/
polyolefin and acrylic/polyolefin fiber or filament blends, or combinations thereof alone or with corresponding fiber-' ~ .' ~' ~ - :
-- , .
- 6 - ~3~5~
like components exemplified by fibrillated fil~s such as polyolefin film.
Generally speaking, web weight making up the wet facing of a wipe possess strong wicking and liquid retention proper-ties and can usefully vary from about 20 to ~0 gm/yd2,depending upon intended use, while hydrophobic webs exhibit strong liquid capillary effects but no significant liquid retention properties internally. These can usefully vary in weight from about 20 to 60 gm/yd2.
The half wipe or dry facing of wipes within the scope of the instant invention is further characterized by up to 5 or more webs (but preferably 1-3 as shown in the above diagrams), each of which comprises hydrophobic fiber- or fiber-like web components of mixed denier, which can be obtained by carding 15 or ~recarding and preferably contains about 85-100 wt. %
polyolefin such as isotactic polypropylene homopolymer or copolymer, the balance, as desired, can be u~efully in the form of other bondable hydrophobic fiber- or fiber-like mate-rial such as polyethylene and/or polyester fiber.
Within webs comprising the dry facing it is also prefer-red that differences in denier of hydrophobic fiber within each web be minimized in externally positioned webs such as web D (diagrams II-III supra) and that corresponding internally positioned dry facing webs such as D' (diagram II) or D', D" (diagram III) exhibit only a a slightly wider mixed _ 7 ~
denier range as one approaches the center of the wipe, so as to augment liquid retention properties without adversely affecting surface capillary properties.
Webs used in the present invention, can be formed from conventionally spun fibers or filaments having cross- sec-tional configurations such as round, "Y", delta, lobed, dia-mond shape or the like, as well as irregular fiber-like mate-rials obtained in the form of fibrillated films of hydrophilic and/or hydrophobic types, provided that the above-indicated concentration and denier ranges are observed.
Generally speaking, the combined web weight of wipes within the scope of the present invention can usefully vary from about 40-100 gm/yd2 and about 10-50 mil in thickness, again depending upon intended use.
Wipes can be embossed, as above noted, using one or more embossing wheel~ arranged in series or in opposition to fur-ther augment wipe strength, loft and liquid retention proper-ties.
It is also found convenient to identify the "wet" and dry sides by printing and/or color differences as desired.
The following examples further illustrate but do not limit the present invention:
Example 1 (A) 11" x 11" half wipes (wet facing) are prepared in a conventional manner by carding fiber webs of blended 65/35 '~- , '. ~
.
.
- 8 - ~ 5~
wt. ~ rayon/isotactic polypropylene staple (1.5") of circular cross-sectional configuration having respective deniers of 1.5 dpf and 2.2 dpf. Two (2) webs of the above-blended hydro-philic/hydrophobic fiber are conventionally thermally bonded at 157-168C at 20-30 psig, using a heated calendar of dia-mond design to obtain wet facings to be laminated to various dry facing combinations for test purposes.
(B) 11" x 11" half wipe (dry facing) are prepared in a conventional manner by carding and calendar bonding test webs using blends of 1-3 dpf isotactic polypropylene staple (1.5").
The webs, arranged in 1-5 web laminates are individually bonded at 155-160C at 20-30, psig then laminated by ultra-sonic bonding to a 2 web facing prepared in A supra. The resulting test wipe is evaluated with respect to wet strength, sink time, absorbency, wipeability and linting in accordance with conventional tests and as described in C
below, the test results being reported in Table 1 below.
(C) Evaluation tests, as hereafter described, are car-ried out using the test wipes prepared in accordance with A
and B supra:
(i) Sink Time (ASTM D117-79 method) A 5 gram sample of test wipe is rolled and placed in a metal open weave basket of known weight and lowered into a tank of distilled water at ambient temperature. The time required ' . ' ~ ' , .. ' ~ .
_ 9 _ ~ 3 3l ~
for the sample to completely submerge below the surface is recorded in seconds.
(ii) Absorbency Capacity ASTM D117-77 method) The basket containing the 5 gram sample of C(i) supra is pulled out of the tank and the basket and wipe allowed to drain for 10 seconds and then weighed. The difference in weight over the basket plus a 5 gram dry sample is reported as absorbency capacity in gm water/gm wipe material.
(iii) Wipeability Using the fabric liquid holding capacity of a particular wipe batch (see ii supra) as a basis, a 10%, 25%, 50~ and 75~
weight of distilled water is separately placed on a glass plate surface. Using a tared dry wipe and a one (1) minute circular motion the liquid is wiped up. The wipe and absorb-ed water are then weighed (within 30 seconds) and the differ-! ence noted over the dry wipe. The results are reported as grams of water (gm) residue on the glass plate surface.
(iv) Linting The weight of the glass plate of C (iii) after all water evaporates off is weight, in situ, and the difference re-corded a~ average weight/in mg/ft2.
(v) Wet Cross-Directional Tensile Strength) Conventionally determined (ref Table I column 3).
. , : . ~ ., ' .
.. ' ~ - . ' '` ' r~
~ c~ ~ l o ~
~ ~ o o l o o l l l l o l o o o o o o o\ ~ 0 1` U~ O O ~ O ~D `D ~ d~ CO ~1 ~u~ o o o o ~ ~ o o o o o o ~ o o ~
~Ul~O OOOOOOOOOO O OO O OOO
~ ~ e O~o ~U7 O O O O O O O O O O O O O o O O O
~1 0 0 ~ O ~, ~ O O _, e~ o oooooooo o oo o oo ' 8 `D ~ O ~ ~ r~ ~ O ~ ~ d~
_ ,.
lu~ ~ ~ ~
I ~ ~ a I ,8 r~ I 8 8 ~ g ~ ~ U~ ~ ~ ~ a~ 3 " è ~ ~ ~ ~ ~ ~ ~ ,, o ~ _, ~ h a) ~
~ C~ ~O CO O ~O X O ~D X O O O CO O ~D eP ~ el~ D~ C C
.~ _ ~ Jo~
~ ~ h ~
~ Ul O m ~ eO ~ ~
g ~ 00 t` ~ D X O~ O ~ ~ ~ ~4 Oo, a~ I` a~ o ~ o a~ ~ o ~ ~ ~
O 0~ ~ O
~ V ~ C C ~ o o ~, ~ ~ ~u ~ ~ ~ ~ ~ ~ ~ ~ ~ U ~ 0\0 3 <~ ~ 3 aa 3 ~
.. ~ I ,~ ~ ~ ~ ~ ~ ~ ~ ,~ ~ ~ ~ ,~ ~ u~ O ~ ~l 3 o ~ <~ C ~ ~ ~
C. ~ 3 3 3 3 3 3 3 3 3 3 ~:) 3 ~ 3 ~0 ~J 3 "J 3 ~ ~ C
~ z ~ ~ 5.~ a~
a~ o ,_, ~ C o o ~V c ~ ~ I v v v C ~ C C
O . U~ O Ir~
' .
For purposes of the instant lnvention, the wlpes represented by Flgure 1 are also dlfferentiated as "lnternally-posltloned fiber- or flber-like-webs" demonstrated by C' and D' of diagram II and C', C", C"', D", D' of _ 5 - ~3~
diagram III, and as "externally-positioned fiber- or fiber-like-web" represented by C and D in diagrams II-III.
The ahove differentiation can also be duplicated, as desired, within components C and D of diagram 1, in which individual web laminates of Diagram II and III are replaced by sequential application of thin layers of unbonded, un-crimped or slightly crimped fiber blends (not shown) of one or more of the above-indicated types and sequences, followed by a bonding step. Generally speaking, the later arrangement is best suited for light weight wipes and easy clean up jobs.
In either case, an externally-positioned web of a wet facing (i.e. C) should favor a high wt. % of hydrophilic com-ponent of not less than about 60 wt. ~, and preferably 90-100%, with a homogeneous or relatively small difference in fiber denier within the web, while corresponding internally-positioned webs (i.e. C', C", C"', of diagrams II and III) should favor a sufficient increase in hydrophobic fiber to meet the above-indicated 50-90/50-10 wt. ~ total and a grad-ùally increasing difference in fiber denier within each web blend as one approaches the center of the wipe.
Particularly favored as blended hydrophilic/hydrophobic components for wet facing webs C, C', C", C"' of the instant invention are rayon/polyolefin, nylon/polyolefin, cotton/
polyolefin and acrylic/polyolefin fiber or filament blends, or combinations thereof alone or with corresponding fiber-' ~ .' ~' ~ - :
-- , .
- 6 - ~3~5~
like components exemplified by fibrillated fil~s such as polyolefin film.
Generally speaking, web weight making up the wet facing of a wipe possess strong wicking and liquid retention proper-ties and can usefully vary from about 20 to ~0 gm/yd2,depending upon intended use, while hydrophobic webs exhibit strong liquid capillary effects but no significant liquid retention properties internally. These can usefully vary in weight from about 20 to 60 gm/yd2.
The half wipe or dry facing of wipes within the scope of the instant invention is further characterized by up to 5 or more webs (but preferably 1-3 as shown in the above diagrams), each of which comprises hydrophobic fiber- or fiber-like web components of mixed denier, which can be obtained by carding 15 or ~recarding and preferably contains about 85-100 wt. %
polyolefin such as isotactic polypropylene homopolymer or copolymer, the balance, as desired, can be u~efully in the form of other bondable hydrophobic fiber- or fiber-like mate-rial such as polyethylene and/or polyester fiber.
Within webs comprising the dry facing it is also prefer-red that differences in denier of hydrophobic fiber within each web be minimized in externally positioned webs such as web D (diagrams II-III supra) and that corresponding internally positioned dry facing webs such as D' (diagram II) or D', D" (diagram III) exhibit only a a slightly wider mixed _ 7 ~
denier range as one approaches the center of the wipe, so as to augment liquid retention properties without adversely affecting surface capillary properties.
Webs used in the present invention, can be formed from conventionally spun fibers or filaments having cross- sec-tional configurations such as round, "Y", delta, lobed, dia-mond shape or the like, as well as irregular fiber-like mate-rials obtained in the form of fibrillated films of hydrophilic and/or hydrophobic types, provided that the above-indicated concentration and denier ranges are observed.
Generally speaking, the combined web weight of wipes within the scope of the present invention can usefully vary from about 40-100 gm/yd2 and about 10-50 mil in thickness, again depending upon intended use.
Wipes can be embossed, as above noted, using one or more embossing wheel~ arranged in series or in opposition to fur-ther augment wipe strength, loft and liquid retention proper-ties.
It is also found convenient to identify the "wet" and dry sides by printing and/or color differences as desired.
The following examples further illustrate but do not limit the present invention:
Example 1 (A) 11" x 11" half wipes (wet facing) are prepared in a conventional manner by carding fiber webs of blended 65/35 '~- , '. ~
.
.
- 8 - ~ 5~
wt. ~ rayon/isotactic polypropylene staple (1.5") of circular cross-sectional configuration having respective deniers of 1.5 dpf and 2.2 dpf. Two (2) webs of the above-blended hydro-philic/hydrophobic fiber are conventionally thermally bonded at 157-168C at 20-30 psig, using a heated calendar of dia-mond design to obtain wet facings to be laminated to various dry facing combinations for test purposes.
(B) 11" x 11" half wipe (dry facing) are prepared in a conventional manner by carding and calendar bonding test webs using blends of 1-3 dpf isotactic polypropylene staple (1.5").
The webs, arranged in 1-5 web laminates are individually bonded at 155-160C at 20-30, psig then laminated by ultra-sonic bonding to a 2 web facing prepared in A supra. The resulting test wipe is evaluated with respect to wet strength, sink time, absorbency, wipeability and linting in accordance with conventional tests and as described in C
below, the test results being reported in Table 1 below.
(C) Evaluation tests, as hereafter described, are car-ried out using the test wipes prepared in accordance with A
and B supra:
(i) Sink Time (ASTM D117-79 method) A 5 gram sample of test wipe is rolled and placed in a metal open weave basket of known weight and lowered into a tank of distilled water at ambient temperature. The time required ' . ' ~ ' , .. ' ~ .
_ 9 _ ~ 3 3l ~
for the sample to completely submerge below the surface is recorded in seconds.
(ii) Absorbency Capacity ASTM D117-77 method) The basket containing the 5 gram sample of C(i) supra is pulled out of the tank and the basket and wipe allowed to drain for 10 seconds and then weighed. The difference in weight over the basket plus a 5 gram dry sample is reported as absorbency capacity in gm water/gm wipe material.
(iii) Wipeability Using the fabric liquid holding capacity of a particular wipe batch (see ii supra) as a basis, a 10%, 25%, 50~ and 75~
weight of distilled water is separately placed on a glass plate surface. Using a tared dry wipe and a one (1) minute circular motion the liquid is wiped up. The wipe and absorb-ed water are then weighed (within 30 seconds) and the differ-! ence noted over the dry wipe. The results are reported as grams of water (gm) residue on the glass plate surface.
(iv) Linting The weight of the glass plate of C (iii) after all water evaporates off is weight, in situ, and the difference re-corded a~ average weight/in mg/ft2.
(v) Wet Cross-Directional Tensile Strength) Conventionally determined (ref Table I column 3).
. , : . ~ ., ' .
.. ' ~ - . ' '` ' r~
~ c~ ~ l o ~
~ ~ o o l o o l l l l o l o o o o o o o\ ~ 0 1` U~ O O ~ O ~D `D ~ d~ CO ~1 ~u~ o o o o ~ ~ o o o o o o ~ o o ~
~Ul~O OOOOOOOOOO O OO O OOO
~ ~ e O~o ~U7 O O O O O O O O O O O O O o O O O
~1 0 0 ~ O ~, ~ O O _, e~ o oooooooo o oo o oo ' 8 `D ~ O ~ ~ r~ ~ O ~ ~ d~
_ ,.
lu~ ~ ~ ~
I ~ ~ a I ,8 r~ I 8 8 ~ g ~ ~ U~ ~ ~ ~ a~ 3 " è ~ ~ ~ ~ ~ ~ ~ ,, o ~ _, ~ h a) ~
~ C~ ~O CO O ~O X O ~D X O O O CO O ~D eP ~ el~ D~ C C
.~ _ ~ Jo~
~ ~ h ~
~ Ul O m ~ eO ~ ~
g ~ 00 t` ~ D X O~ O ~ ~ ~ ~4 Oo, a~ I` a~ o ~ o a~ ~ o ~ ~ ~
O 0~ ~ O
~ V ~ C C ~ o o ~, ~ ~ ~u ~ ~ ~ ~ ~ ~ ~ ~ ~ U ~ 0\0 3 <~ ~ 3 aa 3 ~
.. ~ I ,~ ~ ~ ~ ~ ~ ~ ~ ,~ ~ ~ ~ ,~ ~ u~ O ~ ~l 3 o ~ <~ C ~ ~ ~
C. ~ 3 3 3 3 3 3 3 3 3 3 ~:) 3 ~ 3 ~0 ~J 3 "J 3 ~ ~ C
~ z ~ ~ 5.~ a~
a~ o ,_, ~ C o o ~V c ~ ~ I v v v C ~ C C
O . U~ O Ir~
' .
Claims (22)
1. A method for obtaining wipe material which, in wetted condition, exhibits opposed wet and dry facing, comprising bonding together (A) a wet facing consisting essentially of one or more externally positioned and internally-positioned fiber- or fiber-like-web of blended hydrophilic/hydrophobic components totaling about 50-90/50-10 wt. % respectively, the hydrophilic component of each web of said wet facing having a denier within a range of about 0.5-2.0 dpf, and the hydro-phobic component of each web of said wet facing having a denier not exceeding about 6 dpf; wherein (a) said extern-ally-positioned web of said wet facing contains not less than about 60 wt. % of said hydrophilic component, and fiber- or fiber-like- components thereof are of about the same denier;
and (b) said internally-positioned web(s) of said wet facing contain fiber- or fiber-like-components of mixed denier; with (8) a dry facing of one or more webs comprising one or more hydrophobic fiber- or fiber-like components of mixed denier not exceeding about 6 dpf.
and (b) said internally-positioned web(s) of said wet facing contain fiber- or fiber-like-components of mixed denier; with (8) a dry facing of one or more webs comprising one or more hydrophobic fiber- or fiber-like components of mixed denier not exceeding about 6 dpf.
2. A method of claim 1, wherein the wet facing com-prises about 1-4 webs containing a blend of hydrophilic/
hydrophobic fiber- or fiber-like-components totaling about 50-75/50-25 wt. % respectively.
hydrophobic fiber- or fiber-like-components totaling about 50-75/50-25 wt. % respectively.
3. A method of claim 1, wherein the wet facing com-prises about 1-4 webs containing a blend of rayon/ polyolefin components and the dry facing comprises one or more webs of a polyolefin fiber- or fiber-like-component.
4. A method of claim 1, wherein the wet facing com-prises about 1-4 webs containing a blend of nylon/ polyolefin components and the dry facing comprises one or more web of a polyolefin fiber- or fiber-like-component.
5. A method of claim 1, wherein the wet facing com-prises about 1-4 webs containing a blend of cotton/ polyolefin components and the dry facing comprises one or more webs of a polyolefin fiber- or fiber-like- component.
6. A method of claim 1, wherein the wet facing com-prises about 1-4 webs containing a blend of acrylic/polyolefin components and the dry facing comprises one or more webs of a polyolefin fiber- or fiber-like- component.
7. A method of claim 1, wherein webs of the wet facing are prebonded.
8. A method of claim 1, wherein the dry facing com-prises up to about 5 or more webs consisting of polyolefin fiber- or fiber-like-components having a substantially homogeneous denier within a range of about 0.5-6 dpf.
9. A method of claim 8, wherein the dry facing com-prises up to about 3 webs consisting of polyolefin fiber- or fiber-like-components having a mixed denier within a range of about 0.5-6dpf.
10. A method of claim 1, where webs of the dry facing are treated with a wetting agent.
11. A wipe material comprising in combination, (A) a wet facing consisting essentially of one or more externally posi-tioned and internally positioned fiber- or fiber-like-web of blended hydrophilic/hydrophobic components totaling about 50-90/50-10 wt. % respectively, the hydrophilic component of each web of said wet facing having a denier within a range of about 0.5-2.0 dpf, and the hydrophobic component of each web of said wet facing having a denier not exceeding about 6 dpf; wherein (a) said externally-positioned web of said wet facing contains not less than about 60 wt. % of said hydrophilic component, and fiber- or fiber-like- components thereof are of about the same denier, and (b) said internally-positioned web(s) of said wet facing contain fiber- or fiber-like- components of mixed denier; secured to (B) a dry facing consisting essen-tially of one or more webs comprising one or more hydrophobic fiber- or fiber-like-components of mixed denier not exceeding about 6 dpf.
12. A wipe material of claim 11, wherein the wet facing comprises about 1-4 webs containing a blend of hydrophilic/
hydrophobic fiber- or fiber-like-components totaling about 50-75/50-25 wt %.
hydrophobic fiber- or fiber-like-components totaling about 50-75/50-25 wt %.
13. A wipe material of claim 11, wherein the wet facing comprises about 1-4 webs containing a blend of rayont poly-olefin components and the dry facing comprises one or more webs of a polyolefin fiber- or fiber-like-component.
14. A wipe material of claim 11, wherein the wet facing comprises about 1-4 webs containing a blend of nylon/polyolefin components and the dry facing comprises one or more web of a polyolefin fiber- or fiber-like-component.
15. A wipe material of claim 11, wherein the wet facing comprises about 1-4 webs of containing a blend of cotton/
polyolefin components and the dry facing comprises one or more webs of a polyolefin fiber- or fiber-like-component.
polyolefin components and the dry facing comprises one or more webs of a polyolefin fiber- or fiber-like-component.
16. A wipe material of claim 11, wherein the wet facing comprises about 1-4 webs containing a blend of acrylic/ poly-olefin components and the dry facing comprises one or more webs of a polyolefin fiber- or fiber-like-component.
17. A wipe material of claim 11, wherein the dry facing comprises up to about 5 or more webs consisting of polyolefin fiber- or fiber-like-components having a substantially homo-geneous denier within about 0.5-6 dpf.
18. A wipe material of claim 11, wherein the dry facing comprises about 1-3 webs consisting of polyolefin fiber- or fiber-like components having a mixed denier within about 0.5-6 dpf.
19. A wipe material of claim 11, wherein the dry facing Comprises a web utilizing a fiber mixture of delta and round cross-sectional configuration.
20. A wipe material of claim 11, wherein the wet facing comprises a web utilizing a fiber mixture of delta and round cross-sectional configuration.
21. A wipe material of claim 11, wherein the dry racing is treated with a wetting agent.
22. A wipe material of claim 21, in which the polyolefin fiber or fiber-like component of the dry facing is treated with an ethoxylated fatty acid ester.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US134.287 | 1987-12-17 | ||
| US07/134,287 US4837078A (en) | 1987-12-17 | 1987-12-17 | Wet/dry wipes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1315080C true CA1315080C (en) | 1993-03-30 |
Family
ID=22462669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 585970 Expired - Fee Related CA1315080C (en) | 1987-12-17 | 1988-12-15 | Wet/dry wipes |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US4837078A (en) |
| CA (1) | CA1315080C (en) |
Families Citing this family (44)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE35621E (en) * | 1989-05-30 | 1997-10-07 | Hercules Incorporated | Cardable hydrophobic polypropylene fiber, material and method for preparation thereof |
| DK0486158T3 (en) * | 1990-11-15 | 1996-10-21 | Hercules Inc | Mapable hydrophobic polyolefin fiber, material and method of manufacture thereof |
| US5257982A (en) * | 1990-12-26 | 1993-11-02 | Hercules Incorporated | Fluid absorbing article utilizing a flow control cover sheet |
| US5330457A (en) * | 1991-09-30 | 1994-07-19 | Hercules Incorporated | Enhanced core utilization in absorbent products |
| US5229191A (en) * | 1991-11-20 | 1993-07-20 | Fiberweb North America, Inc. | Composite nonwoven fabrics and method of making same |
| DE69324280T2 (en) * | 1992-01-13 | 1999-08-12 | Hercules Inc | Heat-bondable fibers for resistant nonwovens |
| US5545481A (en) * | 1992-02-14 | 1996-08-13 | Hercules Incorporated | Polyolefin fiber |
| US5302446A (en) * | 1992-03-30 | 1994-04-12 | International Paper Company | Two-sided skin care wipe material and method for its manufacture |
| US5554437A (en) * | 1993-04-06 | 1996-09-10 | Hercules Incorporated | Gamma-sterilizable barrier fabrics |
| GB9307117D0 (en) * | 1993-04-06 | 1993-05-26 | Hercules Inc | Card bonded comfort barrier fabrics |
| SG50447A1 (en) * | 1993-06-24 | 1998-07-20 | Hercules Inc | Skin-core high thermal bond strength fiber on melt spin system |
| US5422172A (en) * | 1993-08-11 | 1995-06-06 | Clopay Plastic Products Company, Inc. | Elastic laminated sheet of an incrementally stretched nonwoven fibrous web and elastomeric film and method |
| GB9317490D0 (en) * | 1993-08-23 | 1993-10-06 | Hercules Inc | Diaper barrier leg-cuff fabrics |
| DK0719879T3 (en) * | 1994-12-19 | 2000-09-18 | Fibervisions L P | Process for producing fibers for high strength nonwoven materials and the resulting fibers and nonwoven fabrics |
| US5595807A (en) * | 1995-06-01 | 1997-01-21 | Gooding, Jr.; Robert B. | Combination wet dry wipe |
| US5763334A (en) * | 1995-08-08 | 1998-06-09 | Hercules Incorporated | Internally lubricated fiber, cardable hydrophobic staple fibers therefrom, and methods of making and using the same |
| US6028018A (en) * | 1996-07-24 | 2000-02-22 | Kimberly-Clark Worldwide, Inc. | Wet wipes with improved softness |
| US6090472A (en) * | 1997-12-31 | 2000-07-18 | Kimberly-Clark Worldwide, Inc. | Nonwoven, porous fabric produced from polymer composite materials |
| US6071451A (en) * | 1997-12-31 | 2000-06-06 | Kimberly-Clark Worldwide, Inc. | Process for making a nonwoven, porous fabric from polymer composite materials |
| US6261674B1 (en) | 1998-12-28 | 2001-07-17 | Kimberly-Clark Worldwide, Inc. | Breathable microlayer polymer film and articles including same |
| US6713414B1 (en) | 2000-05-04 | 2004-03-30 | Kimberly-Clark Worldwide, Inc. | Ion-sensitive, water-dispersible polymers, a method of making same and items using same |
| US6579570B1 (en) | 2000-05-04 | 2003-06-17 | Kimberly-Clark Worldwide, Inc. | Ion-sensitive, water-dispersible polymers, a method of making same and items using same |
| US6423804B1 (en) | 1998-12-31 | 2002-07-23 | Kimberly-Clark Worldwide, Inc. | Ion-sensitive hard water dispersible polymers and applications therefor |
| US6815502B1 (en) | 2000-05-04 | 2004-11-09 | Kimberly-Clark Worldwide, Inc. | Ion-sensitive, water-dispersable polymers, a method of making same and items using same |
| US6429261B1 (en) | 2000-05-04 | 2002-08-06 | Kimberly-Clark Worldwide, Inc. | Ion-sensitive, water-dispersible polymers, a method of making same and items using same |
| US6653406B1 (en) | 2000-05-04 | 2003-11-25 | Kimberly Clark Worldwide, Inc. | Ion-sensitive, water-dispersible polymers, a method of making same and items using same |
| US6683143B1 (en) | 2000-05-04 | 2004-01-27 | Kimberly Clark Worldwide, Inc. | Ion-sensitive, water-dispersible polymers, a method of making same and items using same |
| US6444214B1 (en) | 2000-05-04 | 2002-09-03 | Kimberly-Clark Worldwide, Inc. | Ion-sensitive, water-dispersible polymers, a method of making same and items using same |
| US6835678B2 (en) | 2000-05-04 | 2004-12-28 | Kimberly-Clark Worldwide, Inc. | Ion sensitive, water-dispersible fabrics, a method of making same and items using same |
| US6548592B1 (en) | 2000-05-04 | 2003-04-15 | Kimberly-Clark Worldwide, Inc. | Ion-sensitive, water-dispersible polymers, a method of making same and items using same |
| US6599848B1 (en) | 2000-05-04 | 2003-07-29 | Kimberly-Clark Worldwide, Inc. | Ion-sensitive, water-dispersible polymers, a method of making same and items using same |
| AU2002227065A1 (en) * | 2000-11-01 | 2002-05-15 | The Procter And Gamble Company | Multi-layer substrate for a premoistened wipe capable of controlled fluid release |
| US6586529B2 (en) | 2001-02-01 | 2003-07-01 | Kimberly-Clark Worldwide, Inc. | Water-dispersible polymers, a method of making same and items using same |
| US6828014B2 (en) | 2001-03-22 | 2004-12-07 | Kimberly-Clark Worldwide, Inc. | Water-dispersible, cationic polymers, a method of making same and items using same |
| EP1266600A1 (en) * | 2001-06-13 | 2002-12-18 | The Procter & Gamble Company | Printed wet wipes |
| US20030003832A1 (en) * | 2001-06-29 | 2003-01-02 | The Procter & Gamble Company | Cleaning sheets comprising a fibrous web of carded staple fibers hydroentangled with a reinforcing fibrous web |
| MX2007003436A (en) * | 2004-09-28 | 2007-05-23 | Pgi Polymer Inc | Synthetic nonwoven wiping fabric. |
| EP1696064A1 (en) * | 2005-02-23 | 2006-08-30 | Carl Freudenberg KG | Cleansing sheets, manufacturing process and use thereof |
| GB2430443A (en) * | 2005-09-23 | 2007-03-28 | Lenzing Fibers Ltd | Wicking fabric |
| US20080182048A1 (en) * | 2007-01-25 | 2008-07-31 | William Ouellette | Multizone Web |
| ES2393127T3 (en) * | 2007-09-03 | 2012-12-18 | Sca Hygiene Products Ab | Laminate that has improved cleaning properties and method of producing the laminate |
| WO2013013929A1 (en) * | 2011-07-22 | 2013-01-31 | Essilor International (Compagnie Generale D'optique) | Optical article comprising a surfactant-based temporary antifog coating with an improved durability |
| US10433700B2 (en) | 2013-11-27 | 2019-10-08 | Kimberly-Clark Worldwide, Inc. | Multi-purpose tough stain removal articles |
| MX2018005884A (en) | 2015-11-30 | 2018-08-15 | Kimberly Clark Co | Structures containing thermo-sensitive gels. |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3420235A (en) * | 1966-07-13 | 1969-01-07 | Johnson & Johnson | Interlabial pad |
| US3886942A (en) * | 1970-02-27 | 1975-06-03 | Kimberly Clark Co | Sanitary napkin |
| US3916447A (en) * | 1972-04-24 | 1975-11-04 | Kimberly Clark Co | Low cost, absorbent, clinging, aqueous liquid barrier protective covering |
| DE7703897U1 (en) * | 1977-02-10 | 1977-06-16 | Fa. Carl Freudenberg, 6940 Weinheim | WOUND COMPRESS |
| US4211227A (en) * | 1978-07-03 | 1980-07-08 | The Kendall Company | Surgical sponge material |
| US4296168A (en) * | 1980-02-19 | 1981-10-20 | Ambrose Jere B | Padding sheet formed of a mixture of fibers bonded at their intersections |
| US4355066A (en) * | 1980-12-08 | 1982-10-19 | The Kendall Company | Spot-bonded absorbent composite towel material having 60% or more of the surface area unbonded |
| US4586606B1 (en) * | 1983-10-28 | 1998-01-06 | Int Paper Co | Nonwoven fabric |
| US4741944A (en) * | 1986-07-30 | 1988-05-03 | Kimberly-Clark Corporation | Wet wipe and wipe dispensing arrangement |
-
1987
- 1987-12-17 US US07/134,287 patent/US4837078A/en not_active Expired - Lifetime
-
1988
- 1988-12-15 CA CA 585970 patent/CA1315080C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US4837078A (en) | 1989-06-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA1315080C (en) | Wet/dry wipes | |
| US4298649A (en) | Nonwoven disposable wiper | |
| CA1305036C (en) | Nonwoven wiper laminate | |
| EP0357496B1 (en) | Wiping cloth | |
| GB2126162A (en) | Nonwoven laminate wiper | |
| US20060009106A1 (en) | Wiping sheet | |
| US6797226B2 (en) | Process of making microcreped wipers | |
| EP1696064A1 (en) | Cleansing sheets, manufacturing process and use thereof | |
| EP0389612B1 (en) | Hydraulically entangled wet laid base sheets for wipers | |
| EP1021121B1 (en) | Wipe article having a scrim layer and a three dimensional wiping surface | |
| US7745358B2 (en) | Abrasion-resistant nonwoven fabric for cleaning printer machines | |
| CA2359616A1 (en) | Dryer-activated fabric conditioning articles with improved substrate | |
| JP2968245B2 (en) | Cleaning agent impregnated articles | |
| KR101049623B1 (en) | Dry pulp nonwoven fabric with integrated layer structure | |
| US20020098763A1 (en) | Polishing and cleaning sheet for hard surfaces | |
| EP1147734B1 (en) | Perfumed cleaning sheets | |
| EP1696063A1 (en) | Cleansing sheets, manufacturing process and use thereof | |
| CN216183416U (en) | Composite non-woven fabric for double-sided wiping | |
| CN219294927U (en) | Water-absorbing and oil-absorbing wiping non-woven fabric | |
| JPH05115403A (en) | Fiber assembly for cleaning | |
| JPH11276400A (en) | Wiping material | |
| JP3026888U (en) | Disposable wipes for mops | |
| JPH10272081A (en) | Nonwoven fabric for cleaning, and manufacture thereof | |
| JPH11247064A (en) | Highly oil-absorbing nonwoven fabric for wiping | |
| MXPA00003642A (en) | Cleaning cloth |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |