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GB1058007A - Polyolefin sheet material and the manufacture thereof - Google Patents

Polyolefin sheet material and the manufacture thereof

Info

Publication number
GB1058007A
GB1058007A GB681765A GB681765A GB1058007A GB 1058007 A GB1058007 A GB 1058007A GB 681765 A GB681765 A GB 681765A GB 681765 A GB681765 A GB 681765A GB 1058007 A GB1058007 A GB 1058007A
Authority
GB
United Kingdom
Prior art keywords
polyolefin
rolling
sheet
sheet material
manufacture
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
GB681765A
Inventor
Paul Anthony Mackie
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Priority to GB681765A priority Critical patent/GB1058007A/en
Publication of GB1058007A publication Critical patent/GB1058007A/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
    • B29C55/04—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique
    • B29C55/06—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets uniaxial, e.g. oblique parallel with 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
    • B29C55/18—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of plates or sheets by squeezing between surfaces, e.g. rollers
    • 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
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B29K2023/0658—PE, i.e. polyethylene characterised by its molecular weight
    • B29K2023/0683—UHMWPE, i.e. ultra high molecular weight polyethylene

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

1,058,007. Polyolefin sheet. SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ N.V. Dec. 20, 1965 [Feb. 17, 1965], No. 6817/65. Heading B5B. A process for the manufacture of polyolefin sheet comprises forming sheet material by rolling a non-extruded mass of a polyolefin having a weight average M.W. such that the intrinsic viscosity thereof is above 5.0 (determined as defined below), and subjecting said polyolefin to tensile forces acting in directions lying within the plane of the sheet material formed by rolling and which are at right angles to one another, said rolling being effected at a temperature which is at least 10‹ C. below the normal softening temperature of said polyolefin. The I.V. is determined at 120‹ C. using a 0À1% W./W. solution in decalin. Specified polyolefins are polyethylene, ethylene copolymerized with up to 10 weight per cent of a copolymerizable olefin, and polypropylene, these polymers to have an intrinsic viscosity of at least 8À0. The sheet may be rolled unidirectionally and subsequently stretched at right angles to the rolling direction, or the rollers may be inclined to the direction of movement of the sheet, thereby performing the biaxial stretching in one operation. Rolling is best performed at ambient temperatures.
GB681765A 1965-02-17 1965-02-17 Polyolefin sheet material and the manufacture thereof Expired GB1058007A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB681765A GB1058007A (en) 1965-02-17 1965-02-17 Polyolefin sheet material and the manufacture thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB681765A GB1058007A (en) 1965-02-17 1965-02-17 Polyolefin sheet material and the manufacture thereof

Publications (1)

Publication Number Publication Date
GB1058007A true GB1058007A (en) 1967-02-08

Family

ID=9821299

Family Applications (1)

Application Number Title Priority Date Filing Date
GB681765A Expired GB1058007A (en) 1965-02-17 1965-02-17 Polyolefin sheet material and the manufacture thereof

Country Status (1)

Country Link
GB (1) GB1058007A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2097128A1 (en) * 1970-07-02 1972-03-03 Eastman Kodak Co High molecular polymer sheet - by rolling softened polymer to avoid melt fracture problems

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2097128A1 (en) * 1970-07-02 1972-03-03 Eastman Kodak Co High molecular polymer sheet - by rolling softened polymer to avoid melt fracture problems

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