EP1360241A1 - Film plat multicouche, coextrude, etire biaxialement, soudable utilise pour produire des films tubulaires soudes et son utilisation - Google Patents

Film plat multicouche, coextrude, etire biaxialement, soudable utilise pour produire des films tubulaires soudes et son utilisation

Info

Publication number
EP1360241A1
EP1360241A1 EP01915181A EP01915181A EP1360241A1 EP 1360241 A1 EP1360241 A1 EP 1360241A1 EP 01915181 A EP01915181 A EP 01915181A EP 01915181 A EP01915181 A EP 01915181A EP 1360241 A1 EP1360241 A1 EP 1360241A1
Authority
EP
European Patent Office
Prior art keywords
acid
flat film
film according
layer
diamine
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.)
Withdrawn
Application number
EP01915181A
Other languages
German (de)
English (en)
Inventor
Hartmut Grund
Horst Lang
Helmut Schauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Naturin GmbH and Co
Naturin Werk Becker and Co
Original Assignee
Naturin GmbH and Co
Naturin Werk Becker and Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Naturin GmbH and Co, Naturin Werk Becker and Co filed Critical Naturin GmbH and Co
Publication of EP1360241A1 publication Critical patent/EP1360241A1/fr
Withdrawn legal-status Critical Current

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
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • 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
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1303—Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
    • Y10T428/1307—Bag or tubular film [e.g., pouch, flexible food casing, envelope, etc.]
    • 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
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/131—Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
    • Y10T428/1317—Multilayer [continuous layer]
    • 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
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/131—Glass, ceramic, or sintered, fused, fired, or calcined metal oxide or metal carbide containing [e.g., porcelain, brick, cement, etc.]
    • Y10T428/1317—Multilayer [continuous layer]
    • Y10T428/1321—Polymer or resin containing [i.e., natural or synthetic]
    • 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
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
    • 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
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
    • Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
    • Y10T428/1393—Multilayer [continuous layer]
    • 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.]
    • Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
    • Y10T428/2495—Thickness [relative or absolute]
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31725—Of polyamide
    • 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
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31855—Of addition polymer from unsaturated monomers

Definitions

  • the invention relates to a coextruded, multilayer, biaxially stretched, weldable flat film, from which tubular films are produced in a known manner by welding, which are used for packaging and wrapping foodstuffs, in particular pasty foodstuffs.
  • Multilayer biaxially stretched flat films which are produced either by coextrusion of a tubular film and cutting open the tube or by direct coextrusion of a flat film are known.
  • Such multilayer flat films can be used to produce tubular films by welding for packaging purposes of all kinds, either by bending the flat film together in a known manner to form a tube and by connecting the abutting opposite edges to one another by a sealing strip running in the longitudinal direction.
  • a second possibility is to bend the flat film together to form a tube by letting the opposite edges overlap and by welding the overlapping areas together.
  • the third possibility of forming a tubular film from a flat film is to bend the flat film together to form a tubular film and to weld opposite edge regions to one another along the longitudinal axis, a longitudinal fold being formed in which the same sides of the flat film lie against one another.
  • the object of the invention is therefore to provide a flat film which fulfills the above-mentioned requirements.
  • a multilayer, biaxially stretched flat film in which the two weldable surface layers consist of at least one copolyamide and at least one amorphous polyamide and / or at least one homopolyamide and / or at least one modified polyolefin, and the at least one between the two weldable surface layers contains another layer.
  • the surface layers are made up of at least one sealable copolyamide.
  • Such known copolyamides are prepared from monomers selected from the group consisting of caprolactam, laurolactam, omegaaminoundecanoic acid, adipic acid, azelaic acid, sebacic acid, decanedicarboxylic acid, dodecanedicarboxylic acid, terephthalic acid, isophthalic acid, tetramethylenediamine, pentamethylenediamine and octamethylenediamine, hexamethylene diamine, octamethylene diamine, octamethylene diamine, octamethylene diamine, hexamethylene diamine, octamethylene diamine, hexamethylene diamine, octamethylene diamine, and hexamethylene diamine, hexamethylene diamine, octamethylene diamine, hexamethylene diamine, octamethylene diamine, and hexamethylene diamine, hexamethylene diamine, octam
  • the addition of an amorphous polyamide and / or a homopolyamide and / or a modified polyolefin to a copolyamide in the surface layer significantly increases the seal seam strength compared to pure copolyamide, or high seal seam strengths are achieved even at lower sealing temperatures.
  • the film according to the invention thus has considerable advantages in terms of application technology.
  • the amorphous polyamides used for the surface layer are polyamides whose glass transition temperature in the dry state is between 50 and 200 ° C. Examples include polyamide 6I / 6T, polyamide 6-3 -T and polyamide 61.
  • Polyamides which can be prepared from the same monomers as the copolyamides already described above are used as homopolyamides for the surface layer.
  • the homopolyamides can have both aliphatic and partly aromatic character.
  • the modified polyolefins are copolymers of ethylene or propylene and optionally further linear alpha olefins having 3 to 8 carbon atoms with alpha-beta unsaturated carboxylic acids, preferably acrylic acid, methacrylic acid and / or their metal salts and / or their alkyl esters or corresponding graft copolymers of the monomers mentioned with polyolefins or partially saponified ethylene / vinyl acetate copolymers which are optionally graft-polymerized with an alpha-beta-unsaturated carboxylic acid and have a low degree of saponification or mixtures thereof.
  • alpha-beta unsaturated carboxylic acids preferably acrylic acid, methacrylic acid and / or their metal salts and / or their alkyl esters or corresponding graft copolymers of the monomers mentioned with polyolefins or partially saponified ethylene / vinyl acetate copolymers which are optionally
  • modified polyolefins can be modified homo- or copolymers of ethylene and / or propylene and, if appropriate, further linear alpha-olefins having 3 to 8 carbon atoms, which are Contain monomers from the group of the alpha-beta-unsaturated dicarboxylic acids, preferably maleic acid, fumaric acid, itaconic acid or their acid anhydrides, grafted esters, acid amides or acid imides.
  • the alpha-beta-unsaturated dicarboxylic acids preferably maleic acid, fumaric acid, itaconic acid or their acid anhydrides, grafted esters, acid amides or acid imides.
  • the main component of the respective surface layer is a sealable copolyamide or a mixture of sealable copolyamides, this main component being present in amounts between 50 and 95% by weight.
  • the other components, amorphous polyamide, homopolyamide and modified polyolefin, can be mixed with the main constituent in amounts of 0 to 30% by weight, based on the entire surface layer.
  • At least one further layer is located between the two surface layers of the flat film according to the invention.
  • the additional layer or layers arranged between the two surface layers serve to give the flat film, in addition to the weldability, other desired properties such as a high barrier to oxygen and water vapor, high puncture resistance or good mechanical properties.
  • Materials that can form the layers between the two surface layers are polyamides, polyolefins, modified polyolefins and ethylene vinyl alcohol copolymers. Mixtures of these materials with one another can also be used. Additional layers of adhesion promoters may also be present if adjacent layers do not have sufficient adhesion to one another.
  • Polyamides as the intermediate layer can be homo- and / or copolyamides which are produced from monomers which are selected from the group caprolactam, laurolactam, omegaaminoundecanoic acid, adipic acid, azelaic acid, sebacic acid, decanedicarboxylic acid, dodecanedicarboxylic acid, terephthalic acid, isophthalic acid, tetramethylene diamine, tetramethylene diamine Octamethylenediamine and xylylenediamine.
  • Preferred homo- and copolyamides are polyamide 6, polyamide 12, polyamide 66, polyamide 610, polyamide 612, polyamide MXD6, polyamide 6/66, polyamide 6/12 and polyamide 6I / 6T.
  • the wall thickness of the polyamide intermediate layer is between 5 and 30 ⁇ m.
  • Polyolefins as an intermediate layer are homopolymers of ethylene or propylene and / or copolymers of linear alpha olefins with 2 to 8 carbon atoms.
  • this Layer Preferably for this Layer of linear low density polyethylene, high density polyethylene, polypropylene homopolymer, polypropylene block and polypropylene random copolymer used.
  • the wall thickness of the polyolefin intermediate layer is between 5 and 30 ⁇ m.
  • the modified polyolefins as the intermediate layer are copolymers of ethylene or propylene and optionally further linear alpha olefins having 3 to 8 carbon atoms with alpha-beta-unsaturated carboxylic acids, preferably acrylic acid, methacrylic acid and / or their metal salts and / or their alkyl esters or Corresponding graft copolymers of the monomers mentioned onto polyolefins or partially saponified ethylene-vinyl acetate copolymers, which are optionally graft-polymerized with an alpha-beta-unsaturated carboxylic acid and have a low degree of saponification or mixtures thereof.
  • the modified polyolefins can be modified homo- or copolymers of ethylene and / or propylene and, if appropriate, further linear alpha-olefins having 3 to 8 carbon atoms, the monomers from the group of the alpha-beta-unsaturated dicarboxylic acids, preferably maleic acid, fumaric acid, itaconic acid or their acid anhydrides , Acid esters, acid amides or acid imides grafted on.
  • the wall thickness of the intermediate layer made of modified polyolefin is between 5 and 30 ⁇ m.
  • the ethylene vinyl alcohol copolymers as an intermediate layer are produced by completely saponifying copolymers of ethylene with vinyl acetate.
  • the ethylene content in the ethylene-vinyl alcohol copolymers is between 27 and 48 mol%.
  • ethylene-vinyl alcohol copolymers are preferred, the ethylene content of which is between 34 and 48 mol%.
  • the wall thickness of the intermediate layer made of ethylene vinyl alcohol copolymer is between 3 and 20 ⁇ m.
  • adhesion promoters are homopolymers or copolymers of ethylene and / or propylene and, if appropriate, further linear alpha-olefins having 3 to 8 carbon atoms, the monomers from the group of the alpha-beta-unsaturated dicarboxylic acids, preferably maleic acid , Fumaric acid, itaconic acid or their acid anhydrides, acid esters, acid amides or acid imides grafted on.
  • Preferred sequences of the individual layers in the multilayer flat films according to the invention are given below, the letters and numbers having the following meanings:
  • the number indices 1,2 denote several layers from the same raw material class.
  • AiEBFDAj A1F1EBF2A2; AjDiEBD ⁇ Aj; A ⁇ F ⁇ CF 2 EA 2 ; A ⁇ B ⁇ EDB A2; A ⁇ BD ⁇ CD 2 A 2 ;
  • the flat film may also contain customary auxiliaries, for example antiblocking agents, stabilizers, antistatic agents or lubricants. These auxiliaries are usually added in amounts of 0.1 to 5% by weight. Furthermore, the film can be colored by adding pigments or pigment mixtures.
  • the flat films according to the invention can be produced by two methods known per se.
  • a primary tube with the desired number of layers can be produced by coextrusion, which is then biaxially stretched and heat-set.
  • the tubular film obtained is then cut open on the long side and results in the desired flat film.
  • a flat film with the desired number of layers and with a higher wall thickness is produced directly by coextrusion, which is then biaxially stretched and heat-set and directly yields the desired flat film.
  • Both methods make it possible to produce wide flat films that are too wide for use in packaging and wrapping food. In this case, it is possible to cut the wide flat films in the longitudinal direction into narrower panels, which can then be welded to tubular films of the desired dimension.
  • the tubular films according to the invention have total wall thicknesses of 30 to 100 ⁇ m, preferably 40 to 80 ⁇ m.
  • weld strength 50 mm wide strips were taken from the respective flat foils transversely to the running direction. In each case two strips were welded to one another, welding on the one hand overlapping surface layer 1 with surface layer 2 (welding method 1) and welding on the other hand with surface layer 1 lying on top of one another (welding method 2).
  • a SGPE 20 laboratory welding machine from W. Koppmaschinen served as the welding machine.
  • 25 mm wide strip samples were taken from the welded samples in such a way that the weld seam was transverse to the longitudinal direction of the strip. The strip samples were on a tensile testing machine from Instron with a Pull-off speed of 500 mm / min pulled apart until the weld seam breaks. The maximum force achieved is referred to below as weld strength.
  • the flat films according to the invention show significantly higher weld seam strengths than the comparative example.
  • significantly better weld seam strengths are achieved both at 180 and 200 ° C sealing temperature than in the comparative example.
  • the individual polymers for the different layers were plasticized and homogenized in five extruders on a tubular film coextrusion system.
  • the five melt streams were fed to a five-layer extrusion head in accordance with the desired individual wall thickness ratios and formed into a primary tube, biaxially stretched and heat-set.
  • the primary pipe had a diameter of 67.5 mm and an average total wall thickness of 0.68 mm. It was heated to 122 ° C. with infrared radiation and stretched with an area stretch ratio of 10.4.
  • the biaxially stretched tube was heat set, laid flat and wound up.
  • the mean total wall thickness of the hose was 65 ⁇ m.
  • the lying width was 356 mm.
  • the layers of the finished hose consisted of the following polymers with the specified individual wall thicknesses:
  • 3rd layer polyamide 6, Durethan B 40 F from Bayer AG, 14 ⁇ m
  • adhesion promoter (like 2nd layer), 15 ⁇ m
  • 5th layer (inner layer): mixture 90% polyamide 6/12, Grilon CF6S from EMS-
  • the coextruded tubular film was cut open and wound up as a flat film.
  • Welding method 1 The following values for the weld seam strength were determined:
  • the individual polymers for the different layers were plasticized and homogenized in five extruders on a tubular film coextrusion system.
  • the five melt streams were fed to a five-layer extrusion head in accordance with the desired individual wall thickness ratios and formed into a primary tube, biaxially stretched and heat-set.
  • the primary pipe had a diameter of 67.5 mm and an average total wall thickness of 0.66 mm. It was heated to 126 ° C. with infrared radiation and stretched with an area stretch ratio of 10.1.
  • the biaxially stretched The tube was heat set, laid flat and wound up.
  • the mean total wall thickness of the hose was 65 ⁇ m.
  • the lying width was 355 mm.
  • the layers of the finished hose consisted of the following polymers with the specified individual wall thicknesses:
  • 2nd layer ethylene vinyl alcohol copolymer, Soarnol AT4406 from
  • 3rd layer polyamide 6, Durethan B 40 F from Bayer AG, 19 ⁇ m
  • adhesion promoter modified polyethylene
  • Bynel 4140 from
  • the coextruded tubular film was cut open and wound up as a flat film.
  • Welding method 1 The following values for the weld seam strength were determined:
  • a five-layer flat film was produced as in Example 1, with the difference that the first and fifth layers consisted of pure polyamide 6/12, Grilon CF6S from EMS-Chemie.
  • Welding method 1 The following values for the weld seam strength were determined:

Abstract

L'invention concerne un film plat multicouche, coextrudé, étiré biaxialement et soudable, utilisé pour produire des films tubulaires soudés, ainsi que son utilisation pour emballer et envelopper des aliments. Ce film plat comporte deux couches superficielles soudables à base d'au moins un copolyamide et d'au moins un polyamide amorphe et/ou d'au moins un homopolyamide et/ou d'au moins une polyoléfine modifiée.
EP01915181A 2001-02-01 2001-02-01 Film plat multicouche, coextrude, etire biaxialement, soudable utilise pour produire des films tubulaires soudes et son utilisation Withdrawn EP1360241A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2001/001064 WO2002060991A1 (fr) 2001-02-01 2001-02-01 Film plat multicouche, coextrude, etire biaxialement, soudable utilise pour produire des films tubulaires soudes et son utilisation

Publications (1)

Publication Number Publication Date
EP1360241A1 true EP1360241A1 (fr) 2003-11-12

Family

ID=8164271

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01915181A Withdrawn EP1360241A1 (fr) 2001-02-01 2001-02-01 Film plat multicouche, coextrude, etire biaxialement, soudable utilise pour produire des films tubulaires soudes et son utilisation

Country Status (10)

Country Link
US (1) US6994912B2 (fr)
EP (1) EP1360241A1 (fr)
BR (1) BR0109742A (fr)
CA (1) CA2434588A1 (fr)
CZ (1) CZ20032128A3 (fr)
HU (1) HUP0300964A2 (fr)
MX (1) MXPA03006762A (fr)
NO (1) NO20024712L (fr)
PL (1) PL362480A1 (fr)
WO (1) WO2002060991A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
UA79975C2 (en) * 2002-07-05 2007-08-10 Becker & Co Naturinwerk Biaxial stretch tubular film for the packaging and covering of meat, meat with bones or paste like foodstuffs, bag made from this film and their use
UA80287C2 (en) * 2002-07-05 2007-09-10 Becker & Co Naturinwerk Biaxial stretch tubular film for the packaging and covering of meat, meat with bones or paste-like foodstuffs and use thereof
EP2004389B1 (fr) * 2006-04-06 2011-01-26 Aisapack Holding SA Corps tubulaire d'emballage en matériau thermoplastique avec bande incrustée
US8580363B2 (en) * 2006-04-06 2013-11-12 Aisapack Holding S.A. Flexible multilayer structure for tubes
US8133345B2 (en) * 2007-04-05 2012-03-13 Curtis Goad Method and apparatus for lining process tanks
US9278478B2 (en) 2007-04-05 2016-03-08 Curtis Goad Methods and apparatus for lining process tanks
US10138053B2 (en) 2007-04-05 2018-11-27 Curtis Goad Methods and apparatus for lining process tanks
US8955711B2 (en) 2012-03-22 2015-02-17 Curtis Goad Liners and linings for tanks
US10392186B2 (en) 2012-03-22 2019-08-27 Curtis Goad Liners and linings for tanks and other liquid containment vessels
US9759380B2 (en) 2012-03-22 2017-09-12 Curtis Goad Liners and linings for tanks and other liquid containment vessels
US11376783B2 (en) 2018-10-31 2022-07-05 Curtis Goad Corner profiles and/or corner reinforcement for liners and linings suitable for use with tanks and other storage/containment vessels
US11396125B2 (en) 2019-04-19 2022-07-26 Goad Company Liners and methods of making liners
CN115960456B (zh) * 2022-12-30 2023-12-26 江苏金发科技新材料有限公司 一种可激光焊接的聚酰胺复合材料及其制备方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US648532A (en) * 1900-02-28 1900-05-01 George Nikirk Schindel Whiffletree hook and clip.
US4726984A (en) * 1985-06-28 1988-02-23 W. R. Grace & Co. Oxygen barrier oriented film
US5053259A (en) * 1988-08-23 1991-10-01 Viskase Corporation Amorphous nylon copolymer and copolyamide films and blends
GB9201880D0 (en) 1992-01-29 1992-03-18 Rasmussen O B Laminated films
JPH06297660A (ja) 1993-04-13 1994-10-25 Kureha Chem Ind Co Ltd ポリアミド系混合樹脂からなる層を有する食品包装用二軸延伸フィルム
JPH0847972A (ja) * 1994-06-03 1996-02-20 Unitika Ltd ２軸配向ポリアミドフィルム及びその製造法
US5759648A (en) 1996-07-05 1998-06-02 Viskase Corporation Multilayer plastic film, useful for packaging a cook-in foodstuff
EP0962145B1 (fr) * 1998-06-04 2002-09-25 Naturin GmbH & Co Gaíne biaxialement orientée, remplissable à la main, pour l'emballage et l'enveloppement de produits alimentaires

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO02060991A1 *

Also Published As

Publication number Publication date
CZ20032128A3 (cs) 2004-02-18
US20040067381A1 (en) 2004-04-08
BR0109742A (pt) 2003-02-04
NO20024712D0 (no) 2002-10-01
HUP0300964A2 (en) 2003-08-28
CA2434588A1 (fr) 2002-08-08
PL362480A1 (en) 2004-11-02
NO20024712L (no) 2002-11-18
MXPA03006762A (es) 2004-10-15
WO2002060991A1 (fr) 2002-08-08
US6994912B2 (en) 2006-02-07

Similar Documents

Publication Publication Date Title
DE602005000305T2 (de) Coextrudierte Verpackungsfilme enthaltend Polyamid- und Polyesterschichten
EP0682476B1 (fr) Feuille tubulaire a cinq couches etirable selon deux axes pour l'emballage et la protection de produits alimentaires pateux
EP0467039B1 (fr) Enveloppe tubulaire d'emballage à plusieurs couches
EP0118060B1 (fr) Feuille multicouche avec une couche étanche au gaz et aux arômes, procédé pour sa fabrication et son application
EP1360241A1 (fr) Film plat multicouche, coextrude, etire biaxialement, soudable utilise pour produire des films tubulaires soudes et son utilisation
EP0603678B1 (fr) Enveloppes tubulairs multicouches en résine polymérique ayant deux couches adjacentes en polyamide aliphatiques
EP0673762A2 (fr) Tuyau multicouche en plastique
DE60002586T2 (de) Heissschrumpfbare mehrschichtige kunststofffolie mit barriereeigenschaften
DE69731631T2 (de) Dreischichtfoliestrukturen aus Polyamid
DE2644209C2 (fr)
DE60015953T2 (de) Mehrschichtige verpackungsfolie
EP1359804B1 (fr) Film tubulaire a cinq couches, etire biaxialement, soudable, utilise pour emballer et envelopper des aliments pateux, de la viande et de la viande avec os et son utilisation
DE102005043287A1 (de) Mehrschichtige Wursthülle mit drei nebeneinander liegenden Schichten auf Polyamidbasis
EP2848390A1 (fr) Film multicouches et son procédé de fabrication
EP1858701B1 (fr) Enveloppe alimentaire multicouche comportant deux couches barriere a oxygene
EP1359805B1 (fr) Film tubulaire multicouche, etire biaxialement, soudable, utilise pour emballer et envelopper de la viande, de la viande avec os et des aliments pateux et son utilisation
EP0104436A2 (fr) Film supérieur pour emballage sous peau
WO2002060992A1 (fr) Feuille plate multicouche laminee soudable destinee a la fabrication de feuilles en gaine soudees et utilisation
DE10319006A1 (de) Nahrungsmittelhülle mit antimikrobieller Ausrüstung
EP1519834B1 (fr) Film tubulaire etire biaxialement, pour emballer et envelopper de la viande avec ou sans os ou des produits alimentaires pateux et son utilisation
EP1521674B1 (fr) Film tubulaire a cinq couches, etire biaxialement, pour emballer et entourer de la viande avec ou sans os ou des produits alimentaires pateux et son utilisation
EP1359806B1 (fr) Film tubulaire a cinq couches, etire biaxialement, utilise pour emballer et envelopper de la viande ou de la viande avec os et son utilisation
EP1915254B1 (fr) Enveloppe alimentaire multicouche comprenant au moins une couche a base d'un melange polyester/polyamide
WO1998049007A1 (fr) Film en polypropylene (bopp) metallisable a couche exterieure en polycetone

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20030625

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR

AX Request for extension of the european patent

Extension state: AL LT LV MK RO SI

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SCHAUER, HELMUT

Inventor name: LANG, HORST

Inventor name: GRUND, HARTMUT

17Q First examination report despatched

Effective date: 20031128

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20060901