GB1097457A - Improvements relating to shaping microporous polyolefin sheets - Google Patents

Improvements relating to shaping microporous polyolefin sheets

Info

Publication number
GB1097457A
GB1097457A GB2665665A GB2665665A GB1097457A GB 1097457 A GB1097457 A GB 1097457A GB 2665665 A GB2665665 A GB 2665665A GB 2665665 A GB2665665 A GB 2665665A GB 1097457 A GB1097457 A GB 1097457A
Authority
GB
United Kingdom
Prior art keywords
volume
filler
sheet
polyolefine
shaping
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
GB2665665A
Inventor
Christian Bent Lundsager
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
Publication of GB1097457A publication Critical patent/GB1097457A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/36—After-treatment

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
  • Cell Separators (AREA)

Abstract

Microporous sheet material, suitable for shaping into articles and having a pore volume of at least 25%, is made of a solid composition comprising 6 2/3 -100% by volume of polyolefine having a standard load melt index of 0, 0-40% by volume of a substantially inert plasticizer and 0-93 1/3 % by volume of a filler. The sheet is made by first compounding a composition consisting of 5-65 volume per cent of the polyolefine, 5-60 volume per cent of filler and 90-30 volume per cent of plasticizer and then leaching out at least a portion of the filler or plasticizer or both by a suitable solvent or solvents. The polyolefine may be a mixture of a very high molecular weight polyolefine together with one of a lower molecular weight. The filler may be water-insoluble or water-soluble, lists of materials falling into both categories being given in the Specification. In the examples, the microporous sheet is made by forming a compound of 15% by volume of polyethylene, 15% by volume of silica filler, 67% by volume of petroleum oil and 1% by volume of carbon black, and then shaping it into a sheet. The sheet thus formed was then immersed in hexane at room temperature for one hour to extract the petroleum oil, thus forming a microporous sheet having a pore volume of about 65%.
GB2665665A 1964-06-23 1965-06-23 Improvements relating to shaping microporous polyolefin sheets Expired GB1097457A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US37740964A 1964-06-23 1964-06-23

Publications (1)

Publication Number Publication Date
GB1097457A true GB1097457A (en) 1968-01-03

Family

ID=23488987

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2665665A Expired GB1097457A (en) 1964-06-23 1965-06-23 Improvements relating to shaping microporous polyolefin sheets

Country Status (2)

Country Link
DE (1) DE1266493B (en)
GB (1) GB1097457A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2808576A1 (en) * 1977-02-28 1978-08-31 Solvay MOLDING COMPOUNDS ON THE BASIS OF THERMOPLASTIC POLYMERISATES AND VEGETABLE FIBERS AND THE USE OF THESE COMPOSITIONS IN CALENDING AND THERMAL FORMING

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2808576A1 (en) * 1977-02-28 1978-08-31 Solvay MOLDING COMPOUNDS ON THE BASIS OF THERMOPLASTIC POLYMERISATES AND VEGETABLE FIBERS AND THE USE OF THESE COMPOSITIONS IN CALENDING AND THERMAL FORMING

Also Published As

Publication number Publication date
DE1266493B (en) 1968-04-18

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