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    Flexible sheet materials
    1.
    发明授权
    Flexible sheet materials 失效
    柔性片材

    公开(公告)号：US3869310A

    公开(公告)日：1975-03-04

    申请号：US31113072

    申请日：1972-12-01

    Applicant: KURARAY CO

    Inventor： FUKUSHIMA OSAMU ,  KOGAME KUNIO ,  SATO MASAMI

    IPC: D04H1/54 ,  B44D5/00 ,  B32B27/24

    CPC classification number: D04H1/54

    Abstract: A leather-like sheet material is manufactured by forming a nonwoven fibrous mat of mixed-spun fibers consisting of at least two polymeric materials, impregnating the mat with a liquid which is a solvent for at least one of the polymeric materials but is a non-solvent for the other polymeric materials and dissolving out at least one of the polymeric materials, and coagulating the resulting polymer solution with another liquid which is a nonsolvent for all of the polymeric materials constituting initially the fibers but is at least partially miscible with the liquid used for the prior impregnation of the mat into a porous polymeric structure.

    Abstract translation: 通过形成由至少两种聚合物材料组成的混合纺丝纤维的非织造纤维毡制成皮革状片状材料，用作为至少一种聚合物材料的溶剂的液体浸渍垫子，但是是 用于其它聚合物材料的非溶剂，并溶解出至少一种聚合物材料，并将所得聚合物溶液用另一种液体作为非溶剂凝结，所述液体是构成最初纤维的所有聚合材料，但至少部分混溶 用于将垫预先浸渍到多孔聚合物结构中的液体。

    Manufacture of a porous polymeric sheet
    7.
    发明授权
    Manufacture of a porous polymeric sheet 失效
    多孔聚合物薄膜的制造

    公开(公告)号：US3654066A

    公开(公告)日：1972-04-04

    申请号：US3654066D

    申请日：1969-04-25

    Applicant: KURARAY CO

    Inventor： FUKUSHIMA OSAMU ,  ENOMOTO YUYA ,  SAITO YOSHITAMI

    IPC: B29C44/56 ,  C08J9/28 ,  D06N3/00 ,  D06N3/14 ,  B32B3/26 ,  B32B27/40

    CPC classification number: C08J9/28 ,  B29C44/5627 ,  C08J2201/0544 ,  D06N3/0043 ,  D06N3/14 ,  Y10T428/249953 ,  Y10T428/249979 ,  Y10T442/3325 ,  Y10T442/469 ,  Y10T442/647

    Abstract: A POROUS POLYMERIC SHEET HAVING A SPECFIC GRAVITY OF LESS THAN 0.7 AND A THICKNESS OF 0.05 TO 2.0 MM. AND CONTAINING PORES INCLINED AT AN ANGLE OF LESS THAN 80* AGAINST THE PLANE OF THE SHEET AND HAVING A LENGTH OF 0.03 TO 10 MM. A SHEET MATERIAL COMPRISING SAID POROUS POLYMERIC SHEET AND A SUBSTRATE BOUND TO THE LOWER SURFACE OF SAID POROUS POLYMERIC SHEET. SAID POROUS POLYMERIC SHEET IS PRODUCED BY IMMERSING A POLYMER SOLUTION APPLIED TO A SUPPORT INTO A COAGULATION BATH UNDER A CONDITION OF RAPID COAGULATION RAPIDLY THE UPPER PORTION OF THE SOLUTION AND TO FORM MACROPORES IN THE INNER PORTION; STRESSING THE UPPER PORTION IN TRANSVERSE DIRECTION, THAT IS, A DIRECTION PARALLEL TO THE PLANE OF THE SUPPORT, IN THE BATH TO SHIFT THE UPPER PORTION TO TRANSVERSE DIRECTION AND TO INCLINE THE PORES FORMED; TREATING FURTHER THE LAYER WITH THE BATH TO COMPLETE THE COAGULATION, THEREBY FORMING POROUS STRUCTURE CONTAINING PORES INCLINED AT AN ANGLE OF LESS THAN 80* AGAINST THE PLANE; AND PEELING OFF THE RESULTING POROUS POLYMERIC SHEET FROM THE SUPPORT.

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