WO2013148795A1 - Incrementally-stretched thermoplastic films with enhanced look and feel and methods for making the same - Google Patents
Incrementally-stretched thermoplastic films with enhanced look and feel and methods for making the same Download PDFInfo
- Publication number
- WO2013148795A1 WO2013148795A1 PCT/US2013/034038 US2013034038W WO2013148795A1 WO 2013148795 A1 WO2013148795 A1 WO 2013148795A1 US 2013034038 W US2013034038 W US 2013034038W WO 2013148795 A1 WO2013148795 A1 WO 2013148795A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- film
- incrementally
- stretched
- machine
- stretched film
- Prior art date
Links
- 229920001169 thermoplastic Polymers 0.000 title claims abstract description 57
- 239000004416 thermosoftening plastic Substances 0.000 title claims abstract description 57
- 238000000034 method Methods 0.000 title abstract description 47
- 230000001965 increasing effect Effects 0.000 claims abstract description 46
- 238000005096 rolling process Methods 0.000 claims description 36
- 239000012815 thermoplastic material Substances 0.000 claims description 21
- 238000004049 embossing Methods 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 78
- 230000008569 process Effects 0.000 description 23
- 238000003475 lamination Methods 0.000 description 20
- 239000000463 material Substances 0.000 description 20
- -1 polyethylene Polymers 0.000 description 16
- 238000004519 manufacturing process Methods 0.000 description 14
- 230000000704 physical effect Effects 0.000 description 10
- 229920000092 linear low density polyethylene Polymers 0.000 description 8
- 239000004707 linear low-density polyethylene Substances 0.000 description 8
- 230000009467 reduction Effects 0.000 description 8
- 230000008901 benefit Effects 0.000 description 7
- 238000001125 extrusion Methods 0.000 description 7
- 230000003247 decreasing effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 229920000642 polymer Polymers 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 239000010813 municipal solid waste Substances 0.000 description 5
- 230000009466 transformation Effects 0.000 description 5
- 229920001577 copolymer Polymers 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 239000000203 mixture Substances 0.000 description 4
- 230000008447 perception Effects 0.000 description 4
- 239000002356 single layer Substances 0.000 description 4
- 229920006226 ethylene-acrylic acid Polymers 0.000 description 3
- 229920006225 ethylene-methyl acrylate Polymers 0.000 description 3
- 239000005043 ethylene-methyl acrylate Substances 0.000 description 3
- 239000000049 pigment Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- LIKMAJRDDDTEIG-UHFFFAOYSA-N 1-hexene Chemical compound CCCCC=C LIKMAJRDDDTEIG-UHFFFAOYSA-N 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 2
- 239000005977 Ethylene Substances 0.000 description 2
- 206010021639 Incontinence Diseases 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004708 Very-low-density polyethylene Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000005038 ethylene vinyl acetate Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 238000005304 joining Methods 0.000 description 2
- 229920001684 low density polyethylene Polymers 0.000 description 2
- 239000004702 low-density polyethylene Substances 0.000 description 2
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 2
- 239000005022 packaging material Substances 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 229920001866 very low density polyethylene Polymers 0.000 description 2
- KWKAKUADMBZCLK-UHFFFAOYSA-N 1-octene Chemical compound CCCCCCC=C KWKAKUADMBZCLK-UHFFFAOYSA-N 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- PRAKJMSDJKAYCZ-UHFFFAOYSA-N dodecahydrosqualene Natural products CC(C)CCCC(C)CCCC(C)CCCCC(C)CCCC(C)CCCC(C)C PRAKJMSDJKAYCZ-UHFFFAOYSA-N 0.000 description 1
- HGVPOWOAHALJHA-UHFFFAOYSA-N ethene;methyl prop-2-enoate Chemical compound C=C.COC(=O)C=C HGVPOWOAHALJHA-UHFFFAOYSA-N 0.000 description 1
- QHZOMAXECYYXGP-UHFFFAOYSA-N ethene;prop-2-enoic acid Chemical compound C=C.OC(=O)C=C QHZOMAXECYYXGP-UHFFFAOYSA-N 0.000 description 1
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000012748 slip agent Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 229920006302 stretch film Polymers 0.000 description 1
- 230000002195 synergetic effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 229920002397 thermoplastic olefin Polymers 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
- B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with the direction of feed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
- B29C55/08—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique transverse to the direction of feed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/10—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial
- B29C55/12—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial
- B29C55/14—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively
- B29C55/143—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively firstly parallel to the direction of feed and then transversely thereto
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/02—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets
- B29C55/18—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets by squeezing between surfaces, e.g. rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
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- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
- B32B3/30—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar form; Layered products having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer formed with recesses or projections, e.g. hollows, grooves, protuberances, ribs
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- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
- B32B7/14—Interconnection of layers using interposed adhesives or interposed materials with bonding properties applied in spaced arrangements, e.g. in stripes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/007—Details of, or accessories for, sacks or bags for facilitating the separation of the two walls, e.g. walls of inequal height, tabs; for maintaining the mouth of the sack or bag open
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/02—Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D33/00—Details of, or accessories for, sacks or bags
- B65D33/16—End- or aperture-closing arrangements or devices
- B65D33/28—Strings or strip-like closures, i.e. draw closures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2155/00—Flexible containers made from webs
- B31B2155/001—Flexible containers made from webs by folding webs longitudinally
- B31B2155/0014—Flexible containers made from webs by folding webs longitudinally having their openings facing transversally to the direction of movement
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2160/00—Shape of flexible containers
- B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B2170/00—Construction of flexible containers
- B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/008—Stiffening or reinforcing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/02—Feeding or positioning sheets, blanks or webs
- B31B70/10—Feeding or positioning webs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B70/00—Making flexible containers, e.g. envelopes or bags
- B31B70/74—Auxiliary operations
- B31B70/88—Printing; Embossing
-
- 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
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/514—Oriented
-
- 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
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
-
- 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
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1007—Running or continuous length work
- Y10T156/1008—Longitudinal bending
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/24562—Interlaminar spaces
-
- 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
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/2457—Parallel ribs and/or grooves
Definitions
- the present invention relates generally to thermoplastic films. Specifically, the invention relates to stretched thermoplastic films with increased loft.
- thermoplastic films are a common component in various commercial and consumer products.
- grocery bags, trash bags, sacks, and packaging materials are products that are commonly made from thermoplastic films.
- feminine hygiene products, baby diapers, adult incontinence products, and many other products include thermoplastic films to one extent or another.
- thermoplastic film The cost to produce products including thermoplastic film is directly related to the cost of the thermoplastic film. Recently the cost of thermoplastic materials has risen. In response, many attempt to control manufacturing costs by decreasing the amount of thermoplastic material in a given product.
- MDO machine direction orientation
- incremental stretching involves stretching the film between pairs of smooth rollers.
- MDO involves running a film through the nips of sequential pairs of smooth rollers. The first pair of rollers rotates at a speed less than that of the second pair of rollers. The difference in speed of rotation of the pairs of rollers can cause the film between the pairs of rollers to stretch. The ratio of the roller speeds will roughly determine the amount that the film is stretched. For example, if the first pair of rollers is rotating at 100 feet per minute (“fpm”) and the second pair of rollers is rotating at 500 fpm, the rollers will stretch the film to roughly five times its original length. MDO stretches the film continuously in the machine direction and is often used to create an oriented film.
- Incremental stretching of thermoplastic film typically involves running the film between grooved or toothed rollers.
- the grooves or teeth on the rollers intermesh and stretch the film as the film passes between the rollers.
- Incremental stretching can stretch a film in many small increments that are evenly spaced across the film. The depth at which the intermeshing teeth engage can control the degree of stretching.
- One type of incremental stretching is referred to as ring rolling.
- thermoplastic films can have undesirable properties.
- thinner thermoplastic films can are typically more transparent or translucent.
- consumers commonly associate thinner films with weakness. Such consumers may feel that they are receiving less value for their money when purchasing products with thinner films; and thus, may be dissuaded to purchase thinner thermoplastic films. As such, manufacturers may be dissuaded to stretch a film or use thinner films despite the potential material savings.
- thermoplastic films and manufacturing methods Accordingly, there are a number of considerations to be made in thermoplastic films and manufacturing methods.
- Implementations of the present invention solve one or more problems in the art with apparatus and methods for creating films that appear thicker, and thus, stronger.
- one or more implementations of the present invention include incrementally- stretched films that include undulations and convolutions that extend out of plane of the initial flat film. The undulations and convolutions can provide the film with one or more of increased loft, a perception of thickness, and improved tactile feel.
- Additional implementations include bags including such films and methods of incrementally stretching films in the machine direction to create such films.
- a method of creating a film with one or more of increased loft, a perception of thickness and/or strength, and improved tactile feel can involve providing a film of a thermoplastic material.
- the method can also involve cold stretching the film incrementally in the machine direction by passing the film between intermeshing machine-direction ring rollers. Passing the film through the intermeshing machine-direction ring rollers can create a ribbed pattern including alternating thick and thin linear ribs extending in the transverse direction across the film. Additionally, passing the film through the intermeshing machine-direction ring rollers can further create a plurality of peaks and valleys extending generally in the transverse direction.
- Fig. 1C illustrates a cross-sectional view of another machine-direction incrementally-stretched film with enhanced look and feel similar to that shown in Fig. IB;
- Fig. ID illustrates a cross-sectional view of machine-direction incrementally- stretched film with enhanced look and feel of Fig. 1A taken along the line 1C-1C of Fig. 1 A;
- Fig. 2A illustrates a schematic diagram of a thermoplastic film being incrementally stretched in the machine direction in accordance with one or more implementations of the present invention
- Fig. 2B illustrates an enlarged view of a portion of the thermoplastic film passing through the MD intermeshing rollers of Fig. 2A taken along the circle 2B of Fig. 2A;
- Fig. 4 illustrates a view of MD intermeshing rollers similar to those shown in
- FIG. 5 illustrates a view of yet another machine-direction incrementally- stretched film with enhanced look and feel in accordance with one or more implementations of the present invention
- Fig. 7 illustrates another bag incorporating a machine-direction incrementally- stretched film with enhanced look and feel in accordance with one or more implementations of the present invention
- Fig. 8A illustrates yet another bag incorporating a machine-direction incrementally-stretched film with enhanced look and feel in accordance with one or more implementations of the present invention
- FIG. 9 illustrates a schematic diagram of a bag manufacturing process in accordance with one or more implementations of the present invention.
- Fig. 10 illustrates a schematic diagram of another bag manufacturing process in accordance with one or more implementations of the present invention.
- One or more implementations of the present invention solve one or more problems in the art with apparatus and methods for creating films that appear thicker, and thus, stronger.
- one or more implementations of the present invention include incrementally-stretched films that include undulations and convolutions that extend out of plane of the initial flat film. The undulations and convolutions can provide the film with one or more of increased loft, a perception of thickness, and improved tactile feel.
- Additional implementations include bags including such films and methods of incrementally stretching films in the machine direction to create such films.
- one or more implementations of the present invention can provide thermoplastic films, and products made there from, with less raw material (i.e., a reduced gauge by weight) yet maintained or increased loft.
- one or more implementations can reduce the material needed to produce a product without compromising important material properties, such as loft.
- material reductions can provide significant cost savings.
- thinner films e.g., films with decreased gauge by weight
- consumers may feel that they are receiving less value for their money when purchasing thermoplastic film products with thinner gauges.
- a consumer may not readily detect that one or more films of the present invention has a reduced gauge by weight.
- MD ring rolling of thinner films in accordance with implementations of the present invention allows formation of lofted films that are easily detected and perceived as thicker, stronger films by consumers.
- the increased loft of the film is the result of undulations and convolutions of the film out of plane of the initial flat film.
- the undulations and convolutions do not follow the regular pattern of the teeth marks imparted to the stretched film.
- one or more implementations include localized peaks, ridges, and valleys that run transverse to thicker and thinner ribs.
- One or more implementations also include films with an improved tactile attributes, which reflect the interference of ridges or strain fronts on the ring rolled film with each other to create a locking effect.
- This tactile attribute can provide a consumer with a perception of strength.
- the tactile attribute attributes of films of one or more implementations can exhibit a soft feel. Thus, by increasing the loft of thinner films, the consumer may perceive the lofted film as being thicker, having increased strength, additional processing, and enhanced softness.
- the thermoplastic material of the films of one or more implementations can include, but are not limited to, thermoplastic polyolefins, including polyethylene and copolymers thereof and polypropylene and copolymers thereof.
- the olefin based polymers can include the most common ethylene or propylene based polymers such as polyethylene, polypropylene, and copolymers such as ethylene vinylacetate (EVA), ethylene methyl acrylate (EMA) and ethylene acrylic acid (EAA), or blends of such polyolefins.
- implementations of the present invention can include any flexible or pliable thermoplastic material which may be formed or drawn into a web or film.
- the thermoplastic materials may include a single layer or multiple layers.
- the thermoplastic material may be opaque, transparent, translucent, or tinted.
- the thermoplastic material may be gas permeable or impermeable.
- films of one or more implementations of the present invention can also include one or more additives.
- the films can include pigments, slip agents, anti-block agents, or tackifiers.
- the pigments can include Ti0 2 , or other pigments, that can impart a color and/or opacity to the film.
- a manufacturer can form the films using other suitable processes, such as, a blown film process to produce monolayer, bilayer, or multilayered films. If desired for a given end use, the manufacturer can orient the films by trapped bubble, tenterframe, or other suitable processes. Additionally, the manufacturer can optionally anneal the films.
- a manufacturer can use multiple extruders to supply different melt streams, which a feed block can order into different channels of a multichannel die.
- the multiple extruders can allow a manufacturer to form a multi-layered film with layers having different compositions.
- the die can be an upright cylinder with a circular opening. Rollers can pull molten plastic upward away from the die.
- An air-ring can cool the film as the film travels upwards.
- An air outlet can force compressed air into the center of the extruded circular profile, creating a bubble.
- the air can expand the extruded circular cross section by a multiple of the die diameter. This ratio is called the "blow-up ratio.”
- the manufacturer can collapse the film to double the plies of the film. Alternatively, the manufacturer can cut and fold the film, or cut and leave the film unfolded.
- the term "starting gauge” or “initial gauge” refers to the average distance between the major surfaces of a film before it is incrementally stretched.
- the films of one or more implementations of the present invention can have a starting gauge between about 0.1 mils to about 20 mils, suitably from about 0.2 mils to about 4 mils, suitably in the range of about 0.3 mils to about 2 mils, suitably from about 0.6 mils to about 1.25 mils, suitably from about 0.9 mils to about 1.1 mils, suitably from about 0.3 mils to about 0.7 mils, and suitably from about 0.4 mils and about 0.6 mils.
- the starting gauge of films of one or more implementations of the present invention may not be uniform.
- the starting gauge of films of one or more implementations of the present invention may vary along the length and/or width of the film.
- Figs. 1A-1D illustrate various view of one exemplary MD incrementally- stretched film 10.
- Fig. 1A illustrates a top view of the MD incrementally-stretched film 10
- Figs. IB and ID illustrate cross-sectional views of the MD incrementally-stretched film 10.
- the MD incrementally-stretched film 10 can include a ribbed pattern 12.
- the ribbed pattern 12 can include alternating series of thicker sections or ribs
- the thicker ribs 14 can comprise "un-stretched” regions and the thinner ribs 16 can comprise stretched regions. In one or more implementations, the thicker ribs 14 regions of the incrementally-stretched films may be stretched to a small degree. In any event, the thicker ribs 14 are stretched less compared to the thinner ribs 16. The ribs 14, 16 can extend across the MD incrementally-stretched film 10 in the transverse direction.
- Figs. 1A and IB further illustrates that the thinner ribs 16 can be intermittently dispersed about thicker ribs 14.
- each thinner rib 16 can reside between adjacent thicker ribs 14.
- the thick and thinner ribs 14, 16 can alternate across the film in the machine direction.
- the thicker ribs 14 can be visually distinct from the thinner ribs 16.
- the thicker ribs 14 can be more opaque than the thinner ribs 16.
- the thinner ribs 16 can be more transparent than the thicker ribs 14 in one or more implementations.
- Fig. 1C illustrates another implementation of a cross section of a MD incrementally-stretched film 10 in accordance with the present invention.
- the ribbed pattern 12 can include intermediately thick linear ribs 15.
- the intermediately thick linear ribs 15 can have a thickness 17 that is smaller than the thickness 18 of the thick linear ribs 14, but larger than the thickness 20 of the thin linear ribs 16.
- adjacent thick linear ribs 14 are separated by a pair of thin linear ribs 16 and an intermediately thick linear rib 15 positioned between the pair of thin linear ribs 16.
- the remaining films and thermoplastic bags shown and described herein below illustrate alternating thick and thin linear ribs 14, 16 as shown by Fig. IB.
- films and bags can further optionally include intermediately thick linear ribs 15.
- the ribbed patterns herein below will be described as including alternating thick and thin linear ribs only.
- the ribbed pattern 12 can provide a pleasing appearance and connote strength to a consumer.
- the ribbed pattern 12 can signify that the MD incrementally-stretched film 10 has undergone a physical transformation to modify one or more characteristics of the film.
- the undulations and convolutions 22 can be formed only or substantially in the thinner ribs 16 as shown in Fig. 1A. In alternative implementations the undulations and convolutions 22 can be formed in both the thicker 14 and thinner ribs 16. In still further implementations the undulations and convolutions 22 can be formed only or substantially in the thicker ribs 14.
- the peaks 24 and valleys 26 can provide a look and feel of increased thickness to a film. Furthermore, the peaks 24 and valleys 26 can provide a look and feel of increased thickness to a film despite reduced gauge -by- weight created by stretching the film. One will appreciate that the increased loft and perceived thickness provided by the peaks 24 and valleys 26 is thus unexpected as stretching a film typically reduces the loft and perceived thickness.
- the peaks 24 and valleys 26 can impart a softer feel to the MD incrementally-stretched film
- the MD intermeshing rollers 32, 34 can closely resemble fine pitch spur gears.
- the MD intermeshing rollers 32, 34 can include a plurality of protruding ridges 44, 46.
- the ridges 44, 46 can extend along the MD intermeshing rollers 32, 34 in a direction generally parallel to axes of rotation 36, 40.
- the ridges 44, 46 can extend generally radially outward from the axes of rotation 36, 40.
- the tips of ridges 44, 46 can have a variety of different shapes and configurations.
- the tips of the ridges 44, 46 can have a rounded shape as shown in Fig. 2B.
- implementations of the present invention further include additionally, or alternatively, using TD ring rolling to incrementally stretch a thermoplastic film to enhance, or otherwise modify, physical properties of the film.
- Fig. 5 illustrates a top view of a MD and TD incrementally-stretched film 10c.
- the MD and TD incrementally-stretched film 10c can include alternating series of thicker sections or ribs 14c and thinner sections or ribs 16c.
- the thicker ribs 14c can comprise "lesser-stretched” regions and the thinner ribs 16c can comprise stretched regions.
- the thicker ribs 14c regions of the incrementally-stretched films may be stretched to a small degree. In any event, the thicker ribs 14c are stretched less compared to the thinner ribs 16c.
- the thicker ribs 14c can have a first average thickness or gauge.
- the first average gauge can be approximately equal to a starting gauge of the film 10. In one or more implementations, the first average gauge can be less than the starting gauge.
- the thinner ribs 16c can have a second average thickness or gauge. The second average gauge can be less than both the starting gauge and the first average gauge.
- Fig. 5 further illustrates that the thinner ribs 16c can be intermittently dispersed about thicker ribs 14c. In particular, each thinner rib 16c can reside between adjacent thicker ribs 14c. Additionally, in one or more implementations, the thicker ribs 14c can be visually distinct from the thinner ribs 16c.
- the thicker ribs 14c can be more opaque than the thinner ribs 16c.
- the thinner ribs 16c can be more transparent or translucent than the thicker ribs 14c in one or more implementations.
- the ribs 14c, 16c can provide a pleasing appearance and connote strength to a consumer.
- the ribs 14c, 16c can signify that the film 10c has undergone a transformation to modify one or more characteristics of the film 10c.
- TD ring rolling the film 10 can increase or otherwise modify one or more of the tensile strength, tear resistance, impact resistance, or elasticity of the film 10.
- the ribs 14c, 16c can signify the transformation to a consumer.
- the incrementally-stretched film 10c created by MD and TD ring rolling can allow for even greater material savings by further increasing the surface area of a given portion of film. Additionally, MD and TD ring rolling can provide properties or advantages not obtained by MD or TD ring rolling alone. Thus, checker board pattern created by the ribs can signify these transformations to a consumer.
- a manufacturer can use diagonal direction
- DD DD ring rolling to incrementally stretch a thermoplastic film to create increased loft and tactually-distinct stretched regions.
- a DD ring rolling processes (and associated DD intermeshing rollers) can be similar to the MD ring rolling process (and associated MD intermeshing rollers 32, 34) described herein above, albeit that the ridges and grooves of the DD intermeshing rollers can extend at an angle relative to the axes of rotation.
- the stretched regions can include ribs oriented at an angle relative to the transverse direction such that the ribs are neither parallel to the transverse or machine direction. In further implementations, the orientation of the ribs can be random.
- one or more implementations can include stretched regions arranged in other patterns/shapes.
- additional patterns include, but are not limited to, intermeshing circles, squares, diamonds, hexagons, or other polygons and shapes.
- one or more implementations can include stretched regions arranged in patterns that are combinations of the illustrated and described patterns/shapes.
- mono-layer films were MD incrementally stretched using a cold MD ring rolling process similar to that described herein above.
- the three films were hexene gas phase LLDPE films having a starting gauge of 0.6 mils.
- the intermeshing rolls used in comparative Example 1 had a 0.100" pitch.
- the MD incrementally-stretched films were each assigned a tactile rating and a loft rating. Each of the tactile and loft rating were based on a 0-10 scale. Where a zero rating is a flat un-stretched film. A 10 tactile rating was given to the film that felt the softest and thickest. A 10 loft rating was given to the film that visually appeared to have the greatest loft.
- the MD DOE to pitch ratio used to stretch the films varied from between 0 and 1.0.
- the thermoplastic film was MD incrementally stretched with four different DOEs. Specifically, the film was MD incrementally stretched at MD DOEs of 0.25, 0.50, 0.75, and 1.
- Table I lists some physical properties of these films along with the physical properties of the un-stretched film.
- the results from Table I indicate that the MD incrementally-stretched films can have a maintained or increased loft and tactile feel.
- the loft and tactile feel of the MD incrementally-stretched films can make the films appear thicker and stronger.
- the MD incrementally-stretched films of this example each included maintained or increased loft and tactile feel despite a reduction in gauge by weight.
- stretched films typically have a reduced loft and appear thinner and weaker.
- one film was MD ring rolled with a DOE to pitch ratio of 0.0 and was scored a loft rating of 2.0. On increasing the MD DOE to pitch ratio to 1.0, the loft rating increased to 9.0 with a simultaneous gauge reduction of 25%.
- thermoplastic films of Example 1 were additionally
- TD incrementally stretched using a cold TD ring rolling process similar to that described herein above.
- the TD intermeshing rolls used in comparative Example 2 had a 5.933 " diameter, 0.40" pitch, 30 diametral pitch, and a 141 ⁇ 2° pressure angle.
- the DOE to pitch ratio used to stretch the films was 0.50.
- Table II lists some physical properties of these films along with the physical properties of the un-stretched film.
- the results from Table II indicate that the MD and TD incrementally-stretched films can have a maintained or increased loft and tactile feel.
- the loft and tactile feel of the MD and TD incrementally-stretched films can make the films appear thicker and stronger.
- the MD and TD incrementally-stretched films of this example each included maintained or increased loft and tactile feel despite a reduction in gauge by weight.
- stretched films typically have a reduced loft and appear thinner and weaker.
- one film was MD ring rolled with a DOE to pitch ratio of 1.0, followed by TD ring rolling with a DOE to pitch ratio 0.50.
- the MD and/or TD incrementally-stretched films with increased loft and/or improved look and feel can form part of any type of product made from, or incorporating, thermoplastic films.
- thermoplastic films For instance, grocery bags, trash bags, sacks, packaging materials, feminine hygiene products, baby diapers, adult incontinence products, sanitary napkins, bandages, food storage bags, food storage containers, thermal heat wraps, facial masks, wipes, hard surface cleaners, and many other products can include MD and/or TD incrementally-stretched with maintained or increased physical properties to one extent or another. Trash bags and food storage bags, in particular, may benefit by the films of the present invention.
- the films of the present invention may benefit by the films of the present invention.
- MD incrementally-stretched film 10 illustrated in Figs. 1A-1D may be incorporated in a bag construction, such as a flexible draw tape bag 70.
- the bag 70 can include a bag body 72 formed from a piece of MD incrementally-stretched film 10 folded upon itself along a bag bottom 74. Side seams 76 and 78 can bond the sides of the bag body 72 together to form a semi-enclosed container having an opening 80 along an upper edge 82.
- the bag 70 also optionally includes closure means 84 located adjacent to the upper edge 82 for sealing the top of the bag 70 to form a fully-enclosed container or vessel.
- the bag 70 is suitable for containing and protecting a wide variety of materials and/or objects.
- the closure means 84 can comprise flaps, adhesive tapes, a tuck and fold closure, an interlocking closure, a slider closure, a zipper closure or other closure structures known to those skilled in the art for closing a bag.
- the ribbed pattern can include thicker ribs 14 that extend across the bag 106 in the machine direction. Additionally, the ribbed pattern can include thicker ribs 14c that extend across the bag 86 in the transverse direction, or in other words from the bag bottom 88 to flaps 90 of an upper edge 92 of the bag 86.
- intermeshing rollers with greater or varied ridge pitch can provide the different spacing and thicknesses of the ribs.
- a manufacturer can vary the ridge pitch of the intermeshing rollers to vary the pattern of the ribs, and thus, the aesthetic and/or properties of the bag or film.
- each thinner rib 16d can include a plurality of undulations or convolutions 22 (such as peaks and valleys).
- the undulations or convolutions 22 can provide the bag 86 with increased loft, perceived thickness, perceived strength, and/or enhanced look or feel.
- the bag 86 can require less material to form than an identical bag formed with an un-stretched film 10a of the same thermoplastic material.
- each sidewall 102, 104 can further include undulations or convolutions 22 (such as peaks 24 and valleys 26) that provide the bag 126 with increased loft, perceived thickness, perceived strength, and/or enhanced look or feel.
- the bag 126 can require less material to form than an identical bag formed with an un-stretched film 10a of the same thermoplastic material. Additionally, despite requiring less material, the bag 126 can include the above- recited advantages.
- each sidewall 102, 104 can comprise a multi-layer thermoplastic material.
- the first sidewall 102 can comprise a first film layer 102a and a second film layer 102b.
- first layers 102a, 104a and second layers 102b, 104b may be joined along a first side edge, an opposing second side edge, and a bottom edge.
- Fig. 8B illustrates a first bottom edge 114a joining the first layers 102a, 104a, and a second bottom edge 114b joining the second layers 102b, 104b.
- the bottom edges 114a, 114b may extend between the first and second side edges of each of the first and second layers.
- the thermoplastic sidewalls 102a and 104a, 102b and 104b are joined along the first and second side edges and along the bottom edges 114a, 114b by any suitable process, such as heat sealing.
- the bottom edge 114a, 114b, or one or more of the side edges can comprise a fold as shown in Fig. 8B.
- Fig. 8B illustrates that the inner layer 102b, 104b of each sidewall 102, 104 can be bonded to the outer layer 102a, 104a, of each sidewall 102, 104.
- a plurality of non-continuous bonded regions or bonds 150a can secure the first and second layers 102a, 104a, 102b, 104b of the each sidewall together.
- the bonds 150a can comprise a pattern of linear bonds 150a extending between the first side edge and the second side edge of each sidewall 102, 104.
- the bonds 150a can bond thick linear ribs 14c of the inner layer 102b, 104b of each sidewall 102, 104 to thick linear ribs 14c of the outer layer 102a, 104a of each sidewall 102, 104.
- Fig. 8B illustrates that the bonds 150a can secure some, but not all, of the thick linear ribs 14c of one layer to the thick linear ribs 14c of an adjacent layer.
- bonds 150a can secure every other thick linear rib 14c of adjacent layers together.
- bonds 150a can secure each thick linear rib 14c of adjacent layer together.
- the thin linear ribs 16 may be unbounded.
- partially discontinuous bonding or “partially discontinuous lamination” refers to lamination of two or more layers where the lamination is substantially continuous in the machine direction or in the transverse direction, but not continuous in the other of the machine direction or the transverse direction.
- partially discontinuous lamination refers to lamination of two or more layers where the lamination is substantially continuous in the width of the article but not continuous in the height of the article, or substantially continuous in the height of the article but not continuous in the width of the article.
- partially discontinuous lamination refers to lamination of two or more layers with repeating bonded patterns broken up by repeating unbounded areas in either the machine direction or the transverse direction. Or alternatively, random bonded areas broken up by random un-bonded areas.
- the un-stretched film 10a can pass through a first pair of MD intermeshing rollers 32, 34.
- the un-stretched film 10a can pass through only MD intermeshing rollers, or through MD intermeshing rollers and TD intermeshing rollers or other rollers.
- the manufacturing process 202 can then include an insertion operation 204 for inserting the folded film 10a' into the folded film 10a, or vice versa. Insertion operation 202 can combine and laminate the folded films 10a, 10a' using any of the apparatus and methods described in U.S. Patent Application Nos. 13/225,757 filed Sept. 6, 2011 and 13/225,930 filed Sept. 6, 2011, each of which are incorporated herein by reference in their entirety.
- Fig. 11 illustrates that the film layers 10a, 10a' can then pass through a lamination operation 206 to lightly bond or laminate the films 10a, 10a' together.
- Lamination operation 206 can lightly laminate the folded films 10a, 10a' together via adhesive bonding, pressure bonding, ultrasonic bonding, corona lamination, and the like.
- lamination operation can lightly laminate the folded films 10a, 10a' together by passing them through machine-direction ring rolls, transverse-direction ring rolls, diagonal- direction ring rolls, SELF'ing rollers, embossing rollers, or other intermeshing rollers.
Abstract
Description
Claims
Priority Applications (5)
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CN201380014764.XA CN104411483B (en) | 2012-03-28 | 2013-03-27 | Increment type stretched thermoplastic film and manufacture method thereof with the look and feel strengthened |
AU2013239775A AU2013239775B2 (en) | 2012-03-28 | 2013-03-27 | Incrementally-stretched thermoplastic films with enhanced look and feel and methods for making the same |
CA2867151A CA2867151C (en) | 2012-03-28 | 2013-03-27 | Incrementally-stretched thermoplastic films with enhanced look and feel |
HK15104222.5A HK1203455A1 (en) | 2012-03-28 | 2015-05-04 | Incrementally-stretched thermoplastic films with enhanced look and feel and methods for making the same |
AU2016203267A AU2016203267B2 (en) | 2012-03-28 | 2016-05-19 | Incrementally-stretched thermoplastic films with enhanced look and feel and methods for making the same |
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US13/433,133 US8734016B2 (en) | 2012-03-28 | 2012-03-28 | Incrementally-stretched thermoplastic films with enhanced look and feel and methods for making the same |
US13/433,133 | 2012-03-28 |
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2013
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- 2013-03-27 AU AU2013239775A patent/AU2013239775B2/en not_active Ceased
- 2013-03-27 CN CN201380014764.XA patent/CN104411483B/en not_active Expired - Fee Related
- 2013-03-27 CA CA2867151A patent/CA2867151C/en active Active
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2014
- 2014-03-03 US US14/195,582 patent/US9260224B2/en not_active Expired - Fee Related
- 2014-03-03 US US14/195,565 patent/US9469441B2/en active Active
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2015
- 2015-05-04 HK HK15104222.5A patent/HK1203455A1/en unknown
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2016
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Also Published As
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CA2867151A1 (en) | 2013-10-03 |
US9260224B2 (en) | 2016-02-16 |
US8734016B2 (en) | 2014-05-27 |
US9469441B2 (en) | 2016-10-18 |
US20140174631A1 (en) | 2014-06-26 |
HK1203455A1 (en) | 2015-10-30 |
AU2016203267B2 (en) | 2017-12-14 |
US20140178649A1 (en) | 2014-06-26 |
AU2013239775A1 (en) | 2014-09-04 |
AU2016203267A1 (en) | 2016-06-09 |
AU2013239775B2 (en) | 2016-06-09 |
CA2867151C (en) | 2019-10-15 |
CN104411483A (en) | 2015-03-11 |
CN104411483B (en) | 2016-10-12 |
US20130259408A1 (en) | 2013-10-03 |
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