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    Method for preparing vapour permeable flexible sheet materials
    81.
    发明授权
    Method for preparing vapour permeable flexible sheet materials 失效
    制备蒸气渗透性柔性片材料的方法

    公开(公告)号：US3729538A

    公开(公告)日：1973-04-24

    申请号：US3729538D

    申请日：1970-10-02

    Applicant: POROUS PLASTICS LTD

    Inventor： CUNNINGHAM V ,  BOUTLE D

    IPC: C08J9/26 ,  B29D27/04 ,  C08G53/08

    CPC classification number: C08J9/26 ,  C08J2201/0544 ,  Y10S264/77 ,  Y10S428/904

    Abstract: FOR A METHOD OF MAKING WATER VAPOUR PERRMEABLE FLEXIBLE SHEET MATERIALS WHICH FIND USES AS REPLACEMENTS FOR LEATHER IN WHICH THE MATERIAL IS FORMED FROM A LAYER OF A MIXTURE OF POWDERED REMOVABLE FILLER DISPERSED THROUGH POLYMER SOLUTION WHICH ADHERES TO A TEMPORARY BACKER AND IS COAGULATED AND THE FILLER LEACHED OUT BY SUITABLE LIQUID TREATMENT THE ADVANTAGES OF CERTAIN RATIOS OF POLYMER TO SOLVENT AND CERTAIN RELATIVELY HIGH RATIOS BELOW 3:1 OF FILLER TO POLYMER IN THE MIXTURE ARE SET OUT.

    Elastomeric film and products therefrom
    82.
    发明授权
    Elastomeric film and products therefrom 失效
    弹性薄膜和产品

    公开(公告)号：US3634184A

    公开(公告)日：1972-01-11

    申请号：US3634184D

    申请日：1968-06-06

    Applicant: TENNECO CHEM

    Inventor： WANG WU LAN

    IPC: D06N3/14 ,  B32B27/00 ,  C08J9/28 ,  D04H1/64 ,  B32B5/16 ,  B32B5/30

    CPC classification number: B32B27/00 ,  C08J9/28 ,  C08J2201/0544 ,  Y10S428/904 ,  Y10T428/24994 ,  Y10T428/249971 ,  Y10T428/249978 ,  Y10T428/25 ,  Y10T428/269 ,  Y10T442/2041 ,  Y10T442/2139

    Abstract: Supple, microporous, breathable elastomeric films with a system of intercommunicating cells are described. The films which optionally contain inert organic or inorganic particles varying in size from about 0.02 microns to 150 microns are prepared by deposition from a solution spread on a suitable surface. Deposition is effected by exposure of the solution to a liquid which is miscible with the solvent but which does not dissolve the elastomer. The use of the film in the preparation of leather replacement compositions by integration as a grain layer in and on the surface of suitable substrates is described. For this use the selected substrate is wet with a liquid in which the elastomer is insoluble, coated with a solution of the elastomer in a solvent which is miscible with the liquid used to wet the substrate, and the wet, coated substrate is treated with additional liquid to deposit the elastomer extending into the upper strata of the substrate and above its surface.

    Abstract translation: 描述了具有相互连通的细胞系统的柔软的，微孔的，透气的弹性膜。 任选地含有从大约0.02微米到150微米大小变化的惰性有机或无机颗粒的膜通过从合适表面上扩散的溶液沉积而制备。 通过将溶液暴露于与溶剂混溶但不溶解弹性体的液体来进行沉积。 描述了通过在合适的基底的表面上和表面上整合作为颗粒层来制备皮革替代组合物中的膜的用途。 对于这种用途，所选择的基底用液体润湿，其中弹性体是不溶的，用弹性体溶液涂覆在与用于润湿基底的液体混溶的溶剂中，并且湿的涂覆的基底用额外的 液体以沉积弹性体延伸到衬底的上层和其表面上方。

    Process for preparing microporous sheet materials
    84.
    发明授权
    Process for preparing microporous sheet materials 失效
    制备微孔材料的方法

    公开(公告)号：US3565668A

    公开(公告)日：1971-02-23

    申请号：US3565668D

    申请日：1968-05-27

    Applicant: DU PONT

    Inventor： FARRELL FRANCIS J

    IPC: C08J9/28 ,  D06N3/14 ,  B44D1/44

    CPC classification number: D06N3/14 ,  C08J9/28 ,  C08J2201/052 ,  C08J2201/0544 ,  Y10S428/904

    Abstract: A PROCESS FOR PREPARING MICROPOROUS SHEET MATERIALS IS DISCLOSED WHEREIN A LAYER OF A POLYMER SOLUTION CONTAINING THE REQUIRED AMOUNT OF INERT LIQUID IS APPLIED AT A SUITABLE TEMPERATURE TO A SUBSTRATE (E.G., A FABRIC), AND THEN THE LAYER OF SOLUTION IS SUBJECTED TO COOLING AND BATHING CONDITIONS SUCH THAT (1) THE LAYER IS COOLED BY AT LEAST 5*C., (2) THE SOLUTION IS CONVERTED TO A SUBSTANTIALLY COLLOIDAL POLYMERIC DISPERSION AND (3) THE LAYER IS BATHED WITH A SUITABLE BATHING LIQUID ADAPTED TO EXTRACT SAID SOLVENT UNTIL SUBSTANTIALLY ALL THE SOLVENT IS EXTRACTED.

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