GB871183A - Improvements relating to the production of films of alpha-olefin polymers - Google Patents

Improvements relating to the production of films of alpha-olefin polymers

Info

Publication number
GB871183A
GB871183A GB26574/59A GB2657459A GB871183A GB 871183 A GB871183 A GB 871183A GB 26574/59 A GB26574/59 A GB 26574/59A GB 2657459 A GB2657459 A GB 2657459A GB 871183 A GB871183 A GB 871183A
Authority
GB
United Kingdom
Prior art keywords
stretching
ratio
effected
sheet
alpha
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
GB26574/59A
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.)
Montedison SpA
Original Assignee
Montedison SpA
Montecatini Societa Generale per lIndustria Mineraria e Chimica SpA
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 Montedison SpA, Montecatini Societa Generale per lIndustria Mineraria e Chimica SpA filed Critical Montedison SpA
Publication of GB871183A publication Critical patent/GB871183A/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
    • 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
    • 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
    • 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
    • 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
    • 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
    • C08J2323/10—Homopolymers or copolymers of propene
    • C08J2323/12—Polypropene

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)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

Films of linear crystalline high molecular weight polymers of alpha-olefins are made by extruding a sheet of polymer at least 100 microns thick at 200 DEG -350 DEG C., cooling the extruded sheet and then stretching the sheet in a longitudinal or transverse direction with a ratio of 1 : 2 to 1 : 16 and in a direction at right angles to the first stretching direction with a ratio of from 1 : 3 to 1 : 20, the stretching operations being effected at 50 DEG -170 DEG C. Preferably the polymer is polypropylene of intrinsic viscosity 1,5-6 (especially 2,5-4), as determined in tetrahydronaphthalene at 135 DEG C., and an isotactic content of at least 70% (especially 85 DEG -98%). The first stretching is desirably longitudinal and in a ratio of 1 : 3,5 to 1 : 9. Stretching in the direction at right angles to the first stretching is preferably effected at a ratio of 1 : 5 to 1 : 10. Stretching in one direction may be carried out in more than one stage, and stretching in the direction at right angles to the direction of this multi-stage stretching may be effected in stages between the stages of the multi-stage stretching. Stretching may be effected at from 100 DEG -140 DEG C., and if desired the sheet may be pre-heated prior to stretching. After stretching, the film may be stabilized at from 50 DEG -150 DEG C., desirably from 80 DEG -130 DEG C.
GB26574/59A 1958-08-06 1959-08-04 Improvements relating to the production of films of alpha-olefin polymers Expired GB871183A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT871183X 1958-08-06

Publications (1)

Publication Number Publication Date
GB871183A true GB871183A (en) 1961-06-21

Family

ID=11330753

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26574/59A Expired GB871183A (en) 1958-08-06 1959-08-04 Improvements relating to the production of films of alpha-olefin polymers

Country Status (2)

Country Link
DE (1) DE1234007B (en)
GB (1) GB871183A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3285766A (en) * 1963-03-28 1966-11-15 Avisun Corp Biaxially oriented ethylene polymer coated polypropylene sheet and method for makingsame
US3324218A (en) * 1963-09-28 1967-06-06 Kalle Ag Process for the manufacture of polypropylene films
US3372049A (en) * 1961-10-09 1968-03-05 Minnesota Mining & Mfg Polyolefin film composition, film, and pressure-sensitive adhesive sheet material
DE2650747A1 (en) * 1975-11-05 1977-05-12 Nat Res Dev ORIENTED POLYMER MATERIAL AND METHOD FOR ITS MANUFACTURING

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH260375A (en) * 1943-08-17 1949-03-15 Cellulose Sidac Societe Anonym A method and apparatus for producing a continuous sheet of an organic polymer whose molecules are oriented along two axes.
BE536955A (en) * 1954-03-30
BE538815A (en) * 1954-06-08 1900-01-01
BE561855A (en) * 1956-10-24

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3372049A (en) * 1961-10-09 1968-03-05 Minnesota Mining & Mfg Polyolefin film composition, film, and pressure-sensitive adhesive sheet material
US3285766A (en) * 1963-03-28 1966-11-15 Avisun Corp Biaxially oriented ethylene polymer coated polypropylene sheet and method for makingsame
US3324218A (en) * 1963-09-28 1967-06-06 Kalle Ag Process for the manufacture of polypropylene films
DE2650747A1 (en) * 1975-11-05 1977-05-12 Nat Res Dev ORIENTED POLYMER MATERIAL AND METHOD FOR ITS MANUFACTURING

Also Published As

Publication number Publication date
DE1234007B (en) 1967-02-09

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