GB1317808A - Polypropylene films - Google Patents

Polypropylene films

Info

Publication number
GB1317808A
GB1317808A GB3719570A GB3719570A GB1317808A GB 1317808 A GB1317808 A GB 1317808A GB 3719570 A GB3719570 A GB 3719570A GB 3719570 A GB3719570 A GB 3719570A GB 1317808 A GB1317808 A GB 1317808A
Authority
GB
United Kingdom
Prior art keywords
copolymer
vinyl acetate
film
coated
ethylene
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
GB3719570A
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.)
Cellophane SA France
Original Assignee
Cellophane SA France
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 Cellophane SA France filed Critical Cellophane SA France
Publication of GB1317808A publication Critical patent/GB1317808A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/10—Homopolymers or copolymers of propene
    • C08L23/12—Polypropene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/08—Copolymers of ethene
    • C08L23/0846—Copolymers of ethene with unsaturated hydrocarbons containing other atoms than carbon or hydrogen atoms
    • C08L23/0853—Vinylacetate

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

1317808 Coated film LA CELLOPHANE SA 31 July 1970 [1 Aug 1969] 37195/70 Heading B2E [Also in Divisions B5 and C3] A coated, biaxially oriented film is prepared by melt extruding a film of a blend of isotactic polypropylene with between 1% and 20% by weight of a copolymer of ethylene and vinyl acetate in which the vinyl acetate content is between 10% and 50% by weight cooling the extruded film, biaxially orienting the film and applying thereto an anchoring coating composition and/or a heat sealable or other coating composition. An optimum polymer composition is one in which the ethylene-vinyl acetate copolymer has a melt index below 70, a vinyl acetate content between 25% and 50% and is present in the blend in an amount within the range 5% to 10% by weight. The film may be surface treated with a corona discharge or subjected to surface oxidation and may be coated with an anchoring layer of, for example, conventional anchoring agents having a base of copolymers, acrylic derivatives or melamine/formaldehyde resins prior to being coated with a heat-sealable coating, e.g. a vinylidene chloride copolymer or a copolymer of ethylene and vinyl acetate, or some other coating. In examples polypropylene-ethylene/vinyl acetate films are prepared by melt extrusion, cooled, stretched biaxially, heat set at 170‹C for a few seconds and surface treated to a corona discharge. The films are then coated with either an aqueous dispersion of a copolymer of vinylidene chloride and methyl acrylate (with or without an anchoring layer of a heat hardenable polyester resin or a vinylidene chloride: copolymer), an aqueous emulsion of a copolymer of ethylenevinyl acetate or an ethyl acetate solution of a vinyl acetate/vinyl chloride copolymer.
GB3719570A 1969-08-01 1970-07-31 Polypropylene films Expired GB1317808A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6926457A FR2057118A5 (en) 1969-08-01 1969-08-01

Publications (1)

Publication Number Publication Date
GB1317808A true GB1317808A (en) 1973-05-23

Family

ID=9038474

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3719570A Expired GB1317808A (en) 1969-08-01 1970-07-31 Polypropylene films

Country Status (2)

Country Link
FR (1) FR2057118A5 (en)
GB (1) GB1317808A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005087848A2 (en) * 2004-03-05 2005-09-22 E.I. Dupont De Nemours And Company Ethylene copolymer modified oriented polypropylene

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2508468B1 (en) * 1981-06-29 1985-10-18 Nortene Sa NEW COMPOSITION OF PLASTIC MATERIAL, NET MADE OF THIS PLASTIC MATERIAL AND USE OF THIS NET IN PACKAGING OF LOADS ON PALLET
US4594211A (en) * 1984-11-05 1986-06-10 Dietrich Mohnhaupt Preparing polyolefine based opaque film

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005087848A2 (en) * 2004-03-05 2005-09-22 E.I. Dupont De Nemours And Company Ethylene copolymer modified oriented polypropylene
WO2005087848A3 (en) * 2004-03-05 2005-11-17 Du Pont Ethylene copolymer modified oriented polypropylene

Also Published As

Publication number Publication date
FR2057118A5 (en) 1971-05-21

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees