GB1029511A - Improvements relating to porous sheet material - Google Patents

Improvements relating to porous sheet material

Info

Publication number
GB1029511A
GB1029511A GB426064A GB426064A GB1029511A GB 1029511 A GB1029511 A GB 1029511A GB 426064 A GB426064 A GB 426064A GB 426064 A GB426064 A GB 426064A GB 1029511 A GB1029511 A GB 1029511A
Authority
GB
United Kingdom
Prior art keywords
woven
powder
leachable
thermoplastic resin
sodium
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
GB426064A
Inventor
Harry Crofts
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.)
Nairn Williamson Ltd
Original Assignee
Nairn Williamson Ltd
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 Nairn Williamson Ltd filed Critical Nairn Williamson Ltd
Priority to GB426064A priority Critical patent/GB1029511A/en
Publication of GB1029511A publication Critical patent/GB1029511A/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
    • C08J9/26—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof by elimination of a solid phase from a macromolecular composition or article, e.g. leaching out

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)

Abstract

Porous sheet material is made by melt-coating a free-flowing powder composition of a thermoplastic resin and a leachable powder with or without other constituents onto a porous carrier web, the leachable powder thereafter being leached out, and constituting 45-75% of the total composition by weight and being infusible at the melt-coating temperature. The carrier web may be a woven, non-woven or laminated woven and non-woven, material and may be impregnated with a polyvinyl chloride composition. The preferred thermoplastic resin is polyvinyl chloride or a copolymer of vinyl acetate. The preferred amount of leachable powder is 50-65% by weight. The powder particles should be between 50 and 240 B.S.S. mesh, preferably between 120 and 200 B.S.S. mesh. Another thermoplastic resin, for example, polyurethane elastomer, may be included to improve the abrasion resistance of the product. The leachable material may be sodium chloride, sodium carbonate, a surface active agent or dispersing agent such as sodium salt of an aromatic sulphonic acid, or hydrolysed starch. A small amount of a blowing agent, such as sodium bicarbonate, may be added. Plasticizers, stabilizers, pigments and any other desired additives may also be incorporated.
GB426064A 1964-01-31 1964-01-31 Improvements relating to porous sheet material Expired GB1029511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB426064A GB1029511A (en) 1964-01-31 1964-01-31 Improvements relating to porous sheet material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB426064A GB1029511A (en) 1964-01-31 1964-01-31 Improvements relating to porous sheet material

Publications (1)

Publication Number Publication Date
GB1029511A true GB1029511A (en) 1966-05-11

Family

ID=9773764

Family Applications (1)

Application Number Title Priority Date Filing Date
GB426064A Expired GB1029511A (en) 1964-01-31 1964-01-31 Improvements relating to porous sheet material

Country Status (1)

Country Link
GB (1) GB1029511A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2530189A1 (en) * 1982-07-16 1984-01-20 Fujikura Rubber Ltd METHOD FOR MANUFACTURING COMPRESSIBLE LAYER AND WHITENER FOR PRINTING OPERATIONS
EP0814521A2 (en) * 1996-06-17 1997-12-29 Dai Nippon Printing Co., Ltd. Process for producing porous coating layer, electrode plate for secondary battery with nonaqueous electrolyte, process for producing same and sheet for peeling active material layer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2530189A1 (en) * 1982-07-16 1984-01-20 Fujikura Rubber Ltd METHOD FOR MANUFACTURING COMPRESSIBLE LAYER AND WHITENER FOR PRINTING OPERATIONS
GB2125315A (en) * 1982-07-16 1984-03-07 Fujikura Rubber Ltd Method of producing a compressible layer and of producing a blanket for use in printing
EP0814521A2 (en) * 1996-06-17 1997-12-29 Dai Nippon Printing Co., Ltd. Process for producing porous coating layer, electrode plate for secondary battery with nonaqueous electrolyte, process for producing same and sheet for peeling active material layer
EP0814521A3 (en) * 1996-06-17 1999-03-03 Dai Nippon Printing Co., Ltd. Process for producing porous coating layer, electrode plate for secondary battery with nonaqueous electrolyte, process for producing same and sheet for peeling active material layer
US6162264A (en) * 1996-06-17 2000-12-19 Dai Nippon Printing Co., Ltd. Process for producing porous coating layer electrode plate for secondary battery with nonaqueous electrolyte process for producing same and sheet for peeling active material layer

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