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GB1385196A - Process for the production of laminates - Google Patents

Process for the production of laminates

Info

Publication number
GB1385196A
GB1385196A GB198672*[A GB198672A GB1385196A GB 1385196 A GB1385196 A GB 1385196A GB 198672 A GB198672 A GB 198672A GB 1385196 A GB1385196 A GB 1385196A
Authority
GB
United Kingdom
Prior art keywords
vinylidene chloride
layers
chloride polymer
film
weight
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
Application number
GB198672*[A
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.)
WR Grace and Co Conn
WR Grace and Co
Original Assignee
WR Grace and Co Conn
WR Grace 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 WR Grace and Co Conn, WR Grace and Co filed Critical WR Grace and Co Conn
Priority to GB198672*[A priority Critical patent/GB1385196A/en
Priority to DE2230255A priority patent/DE2230255C2/en
Priority to SE7208329A priority patent/SE399213B/en
Priority to FI1801/72A priority patent/FI57550C/en
Priority to DK312972A priority patent/DK144002C/en
Priority to NLAANVRAGE7208635,A priority patent/NL172930C/en
Priority to IT2615472A priority patent/IT959948B/en
Priority to BE785394A priority patent/BE785394A/en
Priority to CA145,570A priority patent/CA968689A/en
Priority to FR7222903A priority patent/FR2143440B1/fr
Priority to AU43868/72A priority patent/AU468691B2/en
Priority to NO2268/72A priority patent/NO139205C/en
Priority to ES404180A priority patent/ES404180A1/en
Priority to JP6248072A priority patent/JPS5551747B1/ja
Priority to AR242743A priority patent/AR196877A1/en
Priority to CH942772A priority patent/CH577382A5/xx
Publication of GB1385196A publication Critical patent/GB1385196A/en
Expired legal-status Critical Current

Links

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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular articles
    • 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
    • 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
    • B32B27/06—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
    • 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
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B32B27/22—Layered products comprising a layer of synthetic resin characterised by the use of special additives using plasticisers
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/304—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • 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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • 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
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B32B27/322—Layered products comprising a layer of synthetic resin comprising polyolefins comprising halogenated polyolefins, e.g. PTFE
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
    • B32B2038/0028—Stretching, elongating
    • 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
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • 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
    • B32B2323/00—Polyalkenes
    • B32B2323/04—Polyethylene
    • 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
    • B32B2355/00—Specific polymers obtained by polymerisation reactions only involving carbon-to-carbon unsaturated bonds, not provided for in a single one of index codes B32B2323/00 - B32B2333/00
    • B32B2355/02—ABS polymers, i.e. acrylonitrile-butadiene-styrene polymers
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Wrappers (AREA)

Abstract

1385196 Laminated films W R GRACE & CO 23 June 1972 [23 June 1971 14 Jan 1972] 29532/71 and 1986/72 Headings B5B and B5N A heat shrinkable laminate having an oxygen permeability of less than 70 cc. 25 microns/m<SP>2</SP>. 24 hours. atm. at 23‹ C. which comprises an oxygen barrier layer (A) of a vinylidene chloride polymer and a plasticizer therefor, the oxygen barrier layer being laminated on each side to layers (B 1 and B 2 ) of another polymer or mixture of polymers, is made by extruding a film of a vinylidene chloride polymer containing a plasticizer, stretching the film to orient it and render it heat shrinkable, and before or after said stretching, laminating both sides of the film to other polymeric layers which will absorb plasticizer from the vinylidene chloride polymer and which have a combined thickness of at least 75% of the thickness of the film of vinylidene chloride polymer. In a preferred method, a vinylidene chloride polymer containing plasticizer in an amount which gives a film with an initial oxygen permeability of at least 130, preferably at least 200 is extruded, and each side thereof is laminated to another polymeric layer which will absorb plasticizer from the vinylidene chloride polymer and thus reduce the oxygen permeability of the barrier layer to below 70. The laminate may be made by melt-extrusion of the three layers through a single extrusion head having three extrusion orifices to form a tubular extrudate, followed by orientation of the extrudate by internal gaseous pressure. Specified plasticizers include dibutyl sebacate, desirably present in a proportion of 7 to 10% of the vinylidene chloride polymer, and diisobutyl adipate, 2-ethylhexyldiphenylphosphate, and acetyl tri-n-butyl citrate, desirably present in a proportion of 7 to 12%. The vinylidene chloride polymer may contain 90 to 65 % by weight of units derived from vinylidene chloride and 10 to 35% of units derived from vinyl chloride, and the layers B 1 and B 2 may comprise either a compatible blend of ethylene/vinyl acetate copolymer and a minor proportion of the vinylidene chloride polymer used in layer A, or a copolymer of ethylene with up to 40%, especially 10 to 30% by weight of vinyl acetate; a chlorinated polyethylene containing 25 to 50% by weight of chlorine; a methacrylate-butadiene-styrene terpolymer; or a mixture of polyethylene and polyisobutylene. Other suitable polymers are listed. Up to 15% by weight, based on the weight of the blend, of the ethylene/vinyl acetate copolymer used in layers B 1 and B 2 may be present. Scrap laminate may be recycled and used in the production of layers, A, B 1 or B 2 . In the oriented laminate, the combined thickness of the layers, B 1 and B 2 may be at least 100%, but not more than 400%, of the thickness of layer A. Layer A may be 20 to 30 microns thick and the layers B 1 and. B 2 each 15 to 30 microns thick.
GB198672*[A 1971-06-23 1972-01-14 Process for the production of laminates Expired GB1385196A (en)

Priority Applications (16)

Application Number Priority Date Filing Date Title
GB198672*[A GB1385196A (en) 1971-06-23 1972-01-14 Process for the production of laminates
DE2230255A DE2230255C2 (en) 1971-06-23 1972-06-21 Process for producing a heat-shrinkable laminate film and use of the laminate film produced in this way
SE7208329A SE399213B (en) 1971-06-23 1972-06-22 PROCEDURE FOR THE PRODUCTION OF HEAT SHRINKABLE LAMINATE WITH LOW ACID PERMEABILITY BY BATHING SIDE OF AN ORIENTATED SOFTENER-CONTAINING POLYVINYLIDEN CHLORIDE FILM PAFORA MELUBING
FI1801/72A FI57550C (en) 1971-06-23 1972-06-22 FOERFARANDE FOER FRAMSTAELLNING AV VAERMEKRYMPBART FOERPACKNINGSLAMINAT
DK312972A DK144002C (en) 1971-06-23 1972-06-23 PROCEDURE FOR PREPARING A HEAT-CREATIVE FOLI LAMINATE CONTAINING AN ORIENTED FILM OF VINYLIDEN CHLORIDE POLYMES WITH LOW OXYGEN PERMABILITY
NLAANVRAGE7208635,A NL172930C (en) 1971-06-23 1972-06-23 PROCESS FOR THE MANUFACTURE OF A SHRINKABLE LAMINATE, WITH OXYGEN-PROOF PROPERTIES.
IT2615472A IT959948B (en) 1971-06-23 1972-06-23 PROCESS FOR THE PRODUCTION OF LAMINATES WITH LOW PERMEABI LITA TO OXYGEN
BE785394A BE785394A (en) 1971-06-23 1972-06-23 Products for producing laminates.
CA145,570A CA968689A (en) 1971-06-23 1972-06-23 Synthetic resin film laminates and method therefore
FR7222903A FR2143440B1 (en) 1971-06-23 1972-06-23
AU43868/72A AU468691B2 (en) 1971-06-23 1972-06-23 Process forthe production of laminates
NO2268/72A NO139205C (en) 1971-06-23 1972-06-23 PROCEDURE FOR MANUFACTURE OF HOT-SHRINKABLE LAMINATES FOR PACKAGING PURPOSE BY COOKING EXTRACTION AND BIAXIAL STRETCHING
ES404180A ES404180A1 (en) 1971-06-23 1972-06-23 Process for the production of laminates
JP6248072A JPS5551747B1 (en) 1971-06-23 1972-06-23
AR242743A AR196877A1 (en) 1971-06-23 1972-06-23 PROCEDURE FOR THE PRODUCTION OF A THERMO SHRINK LAMINATE
CH942772A CH577382A5 (en) 1971-06-23 1972-06-23

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2953271 1971-06-23
GB198672*[A GB1385196A (en) 1971-06-23 1972-01-14 Process for the production of laminates

Publications (1)

Publication Number Publication Date
GB1385196A true GB1385196A (en) 1975-02-26

Family

ID=26237119

Family Applications (1)

Application Number Title Priority Date Filing Date
GB198672*[A Expired GB1385196A (en) 1971-06-23 1972-01-14 Process for the production of laminates

Country Status (15)

Country Link
JP (1) JPS5551747B1 (en)
AR (1) AR196877A1 (en)
BE (1) BE785394A (en)
CA (1) CA968689A (en)
CH (1) CH577382A5 (en)
DE (1) DE2230255C2 (en)
DK (1) DK144002C (en)
ES (1) ES404180A1 (en)
FI (1) FI57550C (en)
FR (1) FR2143440B1 (en)
GB (1) GB1385196A (en)
IT (1) IT959948B (en)
NL (1) NL172930C (en)
NO (1) NO139205C (en)
SE (1) SE399213B (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0051480A1 (en) * 1980-10-31 1982-05-12 Kureha Kagaku Kogyo Kabushiki Kaisha Laminate films for heat-shrink packaging foodstuffs
US4939040A (en) * 1987-04-24 1990-07-03 W. R. Grace & Co.-Conn. Multilayer film for packaging items under controlled atmosphere
EP0435787A3 (en) * 1989-12-28 1992-06-24 American National Can Company Blended films, structures therefrom, and methods of making and using them
EP3490798B1 (en) * 2016-11-25 2022-07-13 Waldemar Vladimir Schmidt Co-extruded pvc-based food packaging foil and method for the production thereof

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5449288A (en) * 1977-09-05 1979-04-18 Kureha Chemical Ind Co Ltd Method of heating and wrapping to vacuum
US4207363A (en) * 1978-03-29 1980-06-10 Union Carbide Corporation Flexible heat-shrinkable multilayer film for packaging primal meat
JPS55108442A (en) * 1979-01-03 1980-08-20 Union Carbide Corp Film of polyvinylidene chloride and ethylene vinyl acetate copolymer and its manufacture
US7052753B1 (en) 1985-05-16 2006-05-30 Pechiney Emballage Flexible Europe Multiple layer polymeric films and process for making them
US4894107A (en) 1985-05-16 1990-01-16 American National Can Company Process for making multiple layer polymeric films
US4698111A (en) * 1985-07-15 1987-10-06 W. R. Grace & Co., Cryovac Div. Vinylidene chloride composition and film made therefrom
US4686148A (en) * 1985-07-15 1987-08-11 W. R. Grace & Co., Cryovac Div. Vinylidene chloride composition and film made therefrom
US4992335A (en) * 1985-09-12 1991-02-12 Sanders Associates, Inc. Composite material and method of making same
US5019453A (en) * 1985-09-12 1991-05-28 Guerra Richard J Composite material and method of making same
US4935308A (en) * 1985-09-12 1990-06-19 Sanders Associates Composite material and method of making same
US4965136A (en) * 1988-08-16 1990-10-23 W. R. Grace & Co.-Conn. Extruded vinylidene chloride copolymer flexible packaging film
US5030511A (en) * 1989-06-09 1991-07-09 W. R. Grace & Co.-Conn. Extruded vinylidene chloride copolymer flexible packaging film
US5079051A (en) * 1989-12-08 1992-01-07 W. R. Grace & Co.-Conn. High shrink energy/high modulus thermoplastic multi-layer packaging film and bags made therefrom
US5202188A (en) * 1991-08-23 1993-04-13 W. R. Grace & Co.-Conn. Vinylidene chloride film
NZ244002A (en) * 1991-08-23 1996-03-26 Grace W R & Co Extrudable composition containing plasticiser, acrylate/styrene polymer and vinylidene chloride copolymer; multilayer polymeric films
US5538770A (en) * 1994-11-18 1996-07-23 W. R. Grace & Co. -Conn. Vinylidene chloride film with controlled gas permeability
US6045924A (en) * 1996-06-19 2000-04-04 Cryovac, Inc. Film from a vinylidene chloride copolymer containing blend

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1035119A (en) * 1963-05-10 1966-07-06 Union Carbide Corp Process for preparing graft polymers having high impact strength
FR1484153A (en) * 1965-07-01 1967-06-09 Dow Chemical Co Wrapping film and method of making this film
US3524795A (en) * 1965-07-01 1970-08-18 Dow Chemical Co Packaging film
GB1158140A (en) * 1965-12-08 1969-07-16 Nat Distillers Chem Corp High Barrier Thermoplastic Film
US3337914A (en) * 1966-01-03 1967-08-29 Nat Distillers Chem Corp Stacked extrusion die
GB1130024A (en) * 1966-05-11 1968-10-09 Grace W R & Co Improvements relating to shrink packaging

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0051480A1 (en) * 1980-10-31 1982-05-12 Kureha Kagaku Kogyo Kabushiki Kaisha Laminate films for heat-shrink packaging foodstuffs
US4939040A (en) * 1987-04-24 1990-07-03 W. R. Grace & Co.-Conn. Multilayer film for packaging items under controlled atmosphere
EP0435787A3 (en) * 1989-12-28 1992-06-24 American National Can Company Blended films, structures therefrom, and methods of making and using them
EP3490798B1 (en) * 2016-11-25 2022-07-13 Waldemar Vladimir Schmidt Co-extruded pvc-based food packaging foil and method for the production thereof

Also Published As

Publication number Publication date
FR2143440A1 (en) 1973-02-02
NL172930C (en) 1983-11-16
FI57550B (en) 1980-05-30
NL7208635A (en) 1972-12-28
NL172930B (en) 1983-06-16
DK144002B (en) 1981-11-16
FR2143440B1 (en) 1976-12-03
CH577382A5 (en) 1976-07-15
ES404180A1 (en) 1975-11-16
DE2230255C2 (en) 1984-06-07
JPS5551747B1 (en) 1980-12-26
BE785394A (en) 1972-10-16
DK144002C (en) 1982-04-19
CA968689A (en) 1975-06-03
DE2230255A1 (en) 1973-01-11
IT959948B (en) 1973-11-10
NO139205C (en) 1979-01-24
SE399213B (en) 1978-02-06
NO139205B (en) 1978-10-16
FI57550C (en) 1980-09-10
AR196877A1 (en) 1974-02-28

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee