GB866822A - Improvements in the treatment of polymers and copolymers of propylene - Google Patents

Improvements in the treatment of polymers and copolymers of propylene

Info

Publication number
GB866822A
GB866822A GB36663/59A GB3666359A GB866822A GB 866822 A GB866822 A GB 866822A GB 36663/59 A GB36663/59 A GB 36663/59A GB 3666359 A GB3666359 A GB 3666359A GB 866822 A GB866822 A GB 866822A
Authority
GB
United Kingdom
Prior art keywords
propylene
copolymers
tube
copolymer
hot
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
GB36663/59A
Inventor
Basil Eccleston Bartrum
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
Original Assignee
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 filed Critical WR Grace and Co
Priority to GB36663/59A priority Critical patent/GB866822A/en
Publication of GB866822A publication Critical patent/GB866822A/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)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

Articles, particularly films, of polypropylene or copolymers of propylene, which have been oriented by stretching during production, are heated by means of a hot fluid and thereafter subjected, while hot, to bi-axial orientation. In a preferred process polypropylene is extruded in the form of a tube, both stretching operations are effected by gas inflation of the tube between pairs of nip rollers or other restricting means, and heating is effected by passing the tube through a hot liquid, such as propylene glycol. The propylene copolymer, which may be a graft or block copolymer, may be a copolymer of propylene with ethylene, isobutylene, amylene, butadiene or 1- or 2-butene, copolymers of propylene and ethylene containing 5% or less of propylene being excluded. Specifications 866,820 and 866,821 also are referred to.
GB36663/59A 1958-05-28 1958-05-28 Improvements in the treatment of polymers and copolymers of propylene Expired GB866822A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB36663/59A GB866822A (en) 1958-05-28 1958-05-28 Improvements in the treatment of polymers and copolymers of propylene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB36663/59A GB866822A (en) 1958-05-28 1958-05-28 Improvements in the treatment of polymers and copolymers of propylene

Publications (1)

Publication Number Publication Date
GB866822A true GB866822A (en) 1961-05-03

Family

ID=10390147

Family Applications (1)

Application Number Title Priority Date Filing Date
GB36663/59A Expired GB866822A (en) 1958-05-28 1958-05-28 Improvements in the treatment of polymers and copolymers of propylene

Country Status (1)

Country Link
GB (1) GB866822A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2317077A1 (en) * 1975-06-25 1977-02-04 Unilever Nv BIAXIALLY ORIENTED POLYOLEFIN FILM
US4536365A (en) * 1983-12-22 1985-08-20 American Cyanamid Company Process for the manufacture of equally biaxially oriented film
DE3642755A1 (en) * 1986-01-09 1987-07-16 Barmag Barmer Maschf Film strips of thermoplastic high polymer and process and extrusion die for the production thereof
US4917682A (en) * 1986-04-10 1990-04-17 Weyerhaeuser Company Leak resistant elastic waist diaper

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2317077A1 (en) * 1975-06-25 1977-02-04 Unilever Nv BIAXIALLY ORIENTED POLYOLEFIN FILM
US4536365A (en) * 1983-12-22 1985-08-20 American Cyanamid Company Process for the manufacture of equally biaxially oriented film
DE3642755A1 (en) * 1986-01-09 1987-07-16 Barmag Barmer Maschf Film strips of thermoplastic high polymer and process and extrusion die for the production thereof
US4917682A (en) * 1986-04-10 1990-04-17 Weyerhaeuser Company Leak resistant elastic waist diaper

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