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7 条记录 (耗时 0.014 秒)

    Sheet
    1.
    发明授权
    Sheet 有权

    公开(公告)号：US11447612B2

    公开(公告)日：2022-09-20

    申请号：US16315723

    申请日：2017-07-07

    申请人： Oji Holdings Corporation

    发明人： Koh Sakai ,  Hayato Fushimi ,  Hirokazu Sunagawa

    IPC分类号： C08J5/18 ,  C08J5/04 ,  C08L1/02 ,  C08L1/16 ,  C08L29/04

    摘要： The purpose of the present invention is to provide a composite sheet in which the dimension stability when it is tensed is high and the appearance deterioration and the yellowness change are suppressed. The present invention relates to a sheet comprising; cellulose fibers having a fiber width of 1000 nm or less and having a phosphoric acid group or a phosphoric acid group-derived substituent; and a polyvinyl alcohol-based resin, wherein the sheet has a tensile elastic modulus of 3.4 GPa or more.

    Sheets and method for producing sheets
    2.
    发明授权
    Sheets and method for producing sheets 有权

    公开(公告)号：US10808361B2

    公开(公告)日：2020-10-20

    申请号：US15779612

    申请日：2016-11-25

    申请人： OJI HOLDINGS CORPORATION

    发明人： Hirokazu Sunagawa ,  Koh Sakai ,  Hayato Fushimi ,  Go Banzashi

    IPC分类号： D21H19/32 ,  D21H19/72 ,  D21H19/16 ,  D21H19/20 ,  D21H11/18 ,  B32B23/02 ,  B32B27/12

    摘要： It is an object of the present invention to provide a composite sheet, which achieves all of water repellency, water resistance, transparency and mechanical strength. The present invention relates to a sheet having a fiber layer and a coating layer on the fiber layer, wherein the fiber layer comprises ultrafine cellulose fibers having a fiber width of 1000 nm or less in an amount of 60% by mass or more, the haze of the sheet is 20% or less, and the water contact angle of the surface of the sheet on the side of the coating layer which is measured 30 seconds after completion of the dropping of distilled water is 70 degrees or more.

    Sheet
    5.
    发明授权
    Sheet 有权

    公开(公告)号：US11987675B2

    公开(公告)日：2024-05-21

    申请号：US16955534

    申请日：2018-12-18

    申请人： OJI HOLDINGS CORPORATION

    发明人： Koh Sakai ,  Hayato Fushimi

    IPC分类号： D21H11/20 ,  C08J5/06 ,  C08J5/18 ,  C08K3/24 ,  C08K5/092 ,  D21H17/65 ,  D21H21/18

    CPC分类号： C08J5/18 ,  C08J5/06 ,  C08K3/24 ,  C08K5/092 ,  D21H11/20 ,  D21H17/65 ,  D21H21/18 ,  C08J2329/04 ,  C08J2371/02

    摘要： It is an object of the present invention to provide an ultrafine cellulose fiber-containing sheet that is excellent in terms of weather resistance. The present invention relates to a sheet comprising cellulose fibers having a fiber width of 1000 nm or less, wherein the cellulose fibers have anionic functional groups, and the YI increase percentage calculated according to the following equation is 1500% or less.

    YI increase percentage (%)=(yellowness of the sheet after heating−yellowness of the sheet before heating)/yellowness of the sheet before heating×100, wherein

    the yellowness of the sheet after heating is a yellowness measured in accordance with JIS K 7373, after the sheet is subjected to hot pressing at 180° C. at 0.5 MPa for 1 minute, whereas the yellowness of the sheet before heating is a yellowness measured in accordance with JIS K 7373, before the sheet is subjected to the hot pressing.