GB982597A - Improvements in and relating to polypropylene films - Google Patents

Improvements in and relating to polypropylene films

Info

Publication number
GB982597A
GB982597A GB18555/62A GB1855562A GB982597A GB 982597 A GB982597 A GB 982597A GB 18555/62 A GB18555/62 A GB 18555/62A GB 1855562 A GB1855562 A GB 1855562A GB 982597 A GB982597 A GB 982597A
Authority
GB
United Kingdom
Prior art keywords
weight
mixture
polypropylene
film
content
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
GB18555/62A
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.)
Union Carbide Corp
Original Assignee
Union Carbide Corp
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 Union Carbide Corp filed Critical Union Carbide Corp
Publication of GB982597A publication Critical patent/GB982597A/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
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

A composition from which a biaxially oriented film may be made comprises a homogeneous mixture of a first film-forming polypropylene having an isotactic content of more than 82% by weight of mixture and a second film-forming polypropylene having an isotactic content of less than 82% by weight of mixture, said second film-forming polypropylene being present in an amount such that the isotactic content of said film-forming polypropylene mixture is from 40-82% by weight of mixture. Such a homogeneous mixture may have an isotactic content of 78% by weight of mixture and an atactic content of 22% by weight of mixture, said mixture comprising 75 parts by weight of a mixture of a first film-forming polypropylene having an isotactic content of 83% by weight of said first polypropylene and an atactic content of 17% by weight of said first polypropylene, and 25 parts by weight of a mixture of a second film-forming polypropylene having an isotactic content of 58% by weight of said second polypropylene and an atactic content of 42% by weight of said second polypropylene, respectively. Specification 954,432 is referred to.
GB18555/62A 1961-05-24 1962-05-15 Improvements in and relating to polypropylene films Expired GB982597A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11238461A 1961-05-24 1961-05-24

Publications (1)

Publication Number Publication Date
GB982597A true GB982597A (en) 1965-02-10

Family

ID=22343612

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18555/62A Expired GB982597A (en) 1961-05-24 1962-05-15 Improvements in and relating to polypropylene films

Country Status (1)

Country Link
GB (1) GB982597A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1901751A1 (en) * 1968-01-18 1969-11-27 Union Carbide Corp Packaging made of plastic film for extremely low temperatures
DE2815855A1 (en) * 1977-04-13 1978-10-26 Sir Soc Italiana Resine Spa FLEXIBLE COMPOSITE FILMS FOR THE PACKAGING OF FOODSTUFFS

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1901751A1 (en) * 1968-01-18 1969-11-27 Union Carbide Corp Packaging made of plastic film for extremely low temperatures
DE2815855A1 (en) * 1977-04-13 1978-10-26 Sir Soc Italiana Resine Spa FLEXIBLE COMPOSITE FILMS FOR THE PACKAGING OF FOODSTUFFS

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