GB937613A - Method for treating sheets of polymeric olefines for deep drawing - Google Patents

Method for treating sheets of polymeric olefines for deep drawing

Info

Publication number
GB937613A
GB937613A GB4158659A GB4158659A GB937613A GB 937613 A GB937613 A GB 937613A GB 4158659 A GB4158659 A GB 4158659A GB 4158659 A GB4158659 A GB 4158659A GB 937613 A GB937613 A GB 937613A
Authority
GB
United Kingdom
Prior art keywords
film
polypropylene
low pressure
polyolefin
polyethylene
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
GB4158659A
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.)
Hoechst AG
Original Assignee
Hoechst AG
Farbwerke Hoechst AG
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
Priority claimed from DEF27207A external-priority patent/DE1164640B/en
Application filed by Hoechst AG, Farbwerke Hoechst AG filed Critical Hoechst AG
Publication of GB937613A publication Critical patent/GB937613A/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
    • B29C55/143—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets multiaxial biaxial successively firstly parallel to the direction of feed and then transversely thereto
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/002—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor characterised by the choice of material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Manufacture Of Macromolecular Shaped Articles (AREA)

Abstract

A polyolefin film that has previously undergone longitudinal orientation is stretched, at a temperature with the elastic range between the freezing point and the crystallite melting point of the polyolefin, in a transverse direction until the sheet appears substantially isotropic in polarized light. Polyolefins used are derived from monomers of the general formula CH2=CHR in which R represents a hydrogen atom or a straight chain or branched hydrocarbon radical containing 1-12 carbon atoms, especially low pressure polyethylene, polypropylene, and copolymers of ethylene and propylene, and mixtures of polyethylene and polypropylene. The specified temperature range for low pressure polyethylene is from about -100 DEG to 130 DEG C., and for polypropylene from about -40 DEG to 180 DEG C. Advantageously, transverse stretching is carried out on a hot film, immediately followings its manufacture at 40 DEG to 110 DEG C., especially 80 DEG -95 DEG C., to 103-120% of the original width of the film. Film so treated may be deepdrawn without wrinkling. Specifications 799,392, 799,823, 801,031, 862,639, 935,285 and French Specification 1,197,427 are referred to.
GB4158659A 1958-12-06 1959-12-07 Method for treating sheets of polymeric olefines for deep drawing Expired GB937613A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEF27207A DE1164640B (en) 1958-12-06 1958-12-06 Process for the production of deep-drawn films from polyolefins

Publications (1)

Publication Number Publication Date
GB937613A true GB937613A (en) 1963-09-25

Family

ID=7092338

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4158659A Expired GB937613A (en) 1958-12-06 1959-12-07 Method for treating sheets of polymeric olefines for deep drawing

Country Status (1)

Country Link
GB (1) GB937613A (en)

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