JPS6445877A

Porous sheet material and production thereof

Abstract

PURPOSE:To obtain a porous sheet having smooth surfaces, excellent fouling and water pressure resistance with superior durability, by providing a porous layer of a polyurethane based polymer having silicone segments and fluorocarbon segments on a substrate. CONSTITUTION:A porous sheet material having a polyurethane based polymer is produced. In the process, water is emulsified in a solution and/or dispersion of a polymer prepared by covalently bonding silicone segments and fluorocarbon segments to, e.g. the backbone chain and/or side chains, of a polyurethane based polymer obtained by reacting a well-known polyol with a polyisocyanate and a chain extender so as to account for 0.2-50wt.% in the total amount of the above-mentioned polyurethane based polymer in an organic solvent. A fiber substrate is then impregnated and/or coated with the resultant water- in-oil type emulsion of the afore-mentioned polyurethane and gelatinized to afford a sheet material having a porous layer formed thereon. This sheet material has smooth surfaces, excellent fouling and washing resistance and good feeling in spite of porosity thereof.

Term

Term ended

Projected expiry passed 10 August 2007, 19.1 years ago.

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4 claims: 4 independent, 0 dependent

  1. 1
    [Claim(s)] 【特許請求の範囲】 (1) A porous sheet material consisting of polyurethane system resin in which the above-mentioned porous layer has a silicone segment and a fluoridation carbon segment in a main chain and/or a side chain in a porous sheet material which provides on a substrate a porous layer which consists of polyurethane system resin. (1)ポリウレタン系樹脂からなる多孔層を基材上に設けてなる多孔性シート材料において、上記多孔層が主鎖及び/又は側鎖にシリコーンセグメント及び弗化炭素セグメントを有するポリウレタン系樹脂からなることを特徴とする多孔性シート材料。
  2. 2
    (2) A porous sheet material given in a Range (1) paragraph of an application for patent which is the quantity for which the total quantity of a silicone segment and a fluoridation carbon segment accounts 0.2 thru/or 50 % of the weight in the polyurethane system resin whole quantity. (2)シリコーンセグメント及び弗化炭素セグメントの合計量がポリウレタン系樹脂全量中で0.2乃至50重量%を占める量である特許請求の範囲第(1)項に記載の多孔性シート材料。
  3. 3
    (3) In a manufacturing method of a porous sheet material which consists of impregnating and/or applying, and gelling and drying an oil Nakamizu type polyurethane emulsion to a substrate, A manufacturing method of a porous sheet material in which the above-mentioned polyurethane emulsion is characterized by making it come to emulsify water in an organic solvent solution of polyurethane system resin which has a silicone segment and a fluoridation carbon segment in a main chain and/or a side chain, and/or dispersion liquid. (3)油中水型のポリウレタン乳濁液を基材に含浸及び/または塗布し、ゲル化及び乾燥することからなる多孔性シート材料の製造方法において、上記ポリウレタン乳濁液が、主鎖及び/又は側鎖にシリコーンセグメント及び弗化炭素セグメントを有するポリウレタン系樹脂の有機溶剤溶液及び/又は分散液中に水を乳化させてなることを特徴とする多孔性シート材料の製造方法。
  4. 4
    (4) A manufacturing method of a porous sheet material given in a Range (3) paragraph of an application for patent which is the quantity for which the total quantity of a silicone segment and a fluoridation carbon segment accounts 0.2 thru/or 50 % of the weight in the polyurethane system resin whole quantity. (4)シリコーンセグメント及び弗化炭素セグメントの合計量がポリウレタン系樹脂全量中で0.2乃至50重量%を占める量である特許請求の範囲第(3)項に記載の多孔性シート材料の製造方法。