GB992897A - Ethylene copolymer shrinkable films - Google Patents

Ethylene copolymer shrinkable films

Info

Publication number
GB992897A
GB992897A GB118764A GB118764A GB992897A GB 992897 A GB992897 A GB 992897A GB 118764 A GB118764 A GB 118764A GB 118764 A GB118764 A GB 118764A GB 992897 A GB992897 A GB 992897A
Authority
GB
United Kingdom
Prior art keywords
film
ethylene
ethylenically unsaturated
copolymers
rays
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
GB118764A
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.)
Dow Chemical Co
Original Assignee
Dow Chemical 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 Dow Chemical Co filed Critical Dow Chemical Co
Publication of GB992897A publication Critical patent/GB992897A/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • 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
    • 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
    • B29C55/16—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial simultaneously
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
    • C08J2323/04—Homopolymers or copolymers of ethene
    • C08J2323/08—Copolymers of ethene

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

A shrinkable film is made from an interpolymer of a major amount of ethylene and a minor amount of at least one monovinylidene monomer which is a vinyl ester of a C1-C4 alkanoic monobasic acid, a C1-C4 alkyl ester of an a ,b -ethylenically unsaturated monocarboxylic acid, an a ,b -ethylenically unsaturated monocarboxylic acid or an a ,b -ethylenically unsaturated nitrile, the extruded film being irradiated with a dose of ionizing radiation of from 1 to 20 megarads, and then placed under stress to produce orientation by stretching in at least one direction while maintained at from 85-200 DEG C., and cooled to below 70 DEG C. while maintaining said stress. Specified monovinylidene monomers include vinyl acetate, ethyl acrylate, acrylic acid and acrylonitrile. If desired, there may be substituted for a portion of the ethylene up to about 2% of other a -ethylenically unsaturated hydrocarbons, or other polymers and copolymers, e.g. linear polyethylene, polypropylene, ethylene-propylene copolymers, and vinyl chloride-vinylidene chloride copolymers may be blended with the aforesaid ethylene copolymers. Preferably the interpolymerized monovinylidene monomer is from 1-45% by weight of the copolymer, especially 3-20%. Conventional additives may also be present. Film-making is effected in known manner, e.g. by solution casting, solution or melt extrusion or calendering. Tubular film is preferred to flat film. Irradiation is advantageously effected at from room temperature to about 90 DEG C., a dose of 2-10 megarads being preferred. High energy electrons emitted by a resonant transformer or Van der Graaf generator are preferred, but cobalt-60, iron-59, strontium-90, phosphorus-32, carbon-14 and other radioactive elements producing b or g rays upon decay may be used, or X-rays or ultra-violet rays of wavelength between 2000 and 2700 <\>rA. After irradiation the film is preferably heated to 100-120 DEG C., and may be oriented, in the case of tubular film, by inflation to 2-10 times the original diameter concurrently with longitudinally roller stretching to a draw ratio of from 1.4 to 5.0. Film so made has considerable shrinkability at temperatures below 100 DEG C.
GB118764A 1963-01-16 1964-01-10 Ethylene copolymer shrinkable films Expired GB992897A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25176863A 1963-01-16 1963-01-16

Publications (1)

Publication Number Publication Date
GB992897A true GB992897A (en) 1965-05-26

Family

ID=22953329

Family Applications (1)

Application Number Title Priority Date Filing Date
GB118764A Expired GB992897A (en) 1963-01-16 1964-01-10 Ethylene copolymer shrinkable films

Country Status (2)

Country Link
GB (1) GB992897A (en)
NL (1) NL6400232A (en)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2005563A1 (en) * 1969-02-06 1970-09-03 E.I. Du Pont De Nemours And Company, Wilmington, Del. (V.St.A.) Irradiated wax mixtures containing ethylene / vinyl acetate copolymers
FR2132212A1 (en) * 1971-03-30 1972-11-17 Grace W R & Co
DE2857641A1 (en) * 1977-10-11 1979-04-12 Asahi Dow Ltd
DE2924032A1 (en) * 1978-06-20 1980-01-03 Asahi Dow Ltd WITH SPECIAL PLASTIC COVERED ARTICLE AND ITS PRODUCTION
US4336212A (en) 1977-10-11 1982-06-22 Asahi-Dow Limited Composition for drawn film, cold drawn film made of said composition and process for manufacture of said film
EP0055510A1 (en) * 1980-12-31 1982-07-07 Mobil Oil Corporation Process for preparation of heat-shrinkable wrapping of ethylene polymers
EP0064832A2 (en) * 1981-05-01 1982-11-17 E.I. Du Pont De Nemours And Company Elastomeric film
US4865780A (en) * 1984-12-03 1989-09-12 Viskase Corporation Process for producing irradiated multilayer film for primal meat packaging
US4997690A (en) * 1984-12-03 1991-03-05 Viskase Corporation Irradiated multilayer film for primal meat packaging
WO2002051913A1 (en) * 2000-12-25 2002-07-04 Syfan Saad (99) Ltd. Improved process for the manufacture of thermoplastic shrink films
EP1876010A1 (en) * 2006-07-06 2008-01-09 Alcan Technology &amp; Management Ltd. Process for thermoforming a biaxial stretched plastic film

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2005563A1 (en) * 1969-02-06 1970-09-03 E.I. Du Pont De Nemours And Company, Wilmington, Del. (V.St.A.) Irradiated wax mixtures containing ethylene / vinyl acetate copolymers
FR2132212A1 (en) * 1971-03-30 1972-11-17 Grace W R & Co
DE2857642C2 (en) * 1977-10-11 1983-07-07 Asahi-Dow Ltd., Tokyo Cold stretched film and method of making the film
DE2857641A1 (en) * 1977-10-11 1979-04-12 Asahi Dow Ltd
DE2844363A1 (en) 1977-10-11 1979-04-12 Asahi Dow Ltd MATERIAL FOR RECEIVABLE FILM, THEREFORE COLD STRETCHED FILM, AND METHOD FOR PRODUCING THE FILM
US4336212A (en) 1977-10-11 1982-06-22 Asahi-Dow Limited Composition for drawn film, cold drawn film made of said composition and process for manufacture of said film
US4542886A (en) * 1977-10-11 1985-09-24 Y. Toyoda International Patent Office Process for preparing cold drawn film from an ethylene-α-olefin copolymer and at least one of low-density polyethylene or ethylene copolymers and polypropylene, high density polyethylene or crystalline polybutadiene
DE2924032A1 (en) * 1978-06-20 1980-01-03 Asahi Dow Ltd WITH SPECIAL PLASTIC COVERED ARTICLE AND ITS PRODUCTION
EP0055510A1 (en) * 1980-12-31 1982-07-07 Mobil Oil Corporation Process for preparation of heat-shrinkable wrapping of ethylene polymers
EP0064832A3 (en) * 1981-05-01 1983-09-21 E.I. Du Pont De Nemours And Company Elastomeric film
EP0064832A2 (en) * 1981-05-01 1982-11-17 E.I. Du Pont De Nemours And Company Elastomeric film
US4865780A (en) * 1984-12-03 1989-09-12 Viskase Corporation Process for producing irradiated multilayer film for primal meat packaging
US4997690A (en) * 1984-12-03 1991-03-05 Viskase Corporation Irradiated multilayer film for primal meat packaging
WO2002051913A1 (en) * 2000-12-25 2002-07-04 Syfan Saad (99) Ltd. Improved process for the manufacture of thermoplastic shrink films
EP1876010A1 (en) * 2006-07-06 2008-01-09 Alcan Technology &amp; Management Ltd. Process for thermoforming a biaxial stretched plastic film

Also Published As

Publication number Publication date
NL6400232A (en) 1964-07-17

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