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    Adsorptive temporary fixing sheet and method for manufacturing same
    2.
    发明授权
    Adsorptive temporary fixing sheet and method for manufacturing same 有权

    公开(公告)号：US11565238B2

    公开(公告)日：2023-01-31

    申请号：US16603388

    申请日：2018-01-22

    Applicant: NITTO DENKO CORPORATION

    Inventor： Toru Iseki ,  Kohei Doi ,  Mitsuhiro Kanada ,  Kazumichi Kato ,  Hideyuki Tokuyama

    IPC: B01J20/26 ,  C09J7/10 ,  B01J20/28 ,  B01J20/30 ,  H01L21/683

    Abstract: Provided is an adsorption temporary fixing sheet having a sufficient shear adhesive strength in a direction parallel to its surface, and having a weak adhesive strength in a direction vertical to the surface. Also provided is a method of producing such adsorption temporary fixing sheet. The adsorption temporary fixing sheet includes a foam layer including an open-cell structure, wherein, when a silicon chip vertical adhesive strength of a surface of the foam layer after 20 hours at each of such different temperatures as −40° C., 23° C., or 125° C. is represented by V1 (N/1 cm□), V2 (N/1 cm□), or V3 (N/1 cm□) and when a silicon chip shearing adhesive strength of the surface of the foam layer after 20 hours at each of the different temperatures (−40° C., 23° C., or 125° C.) is represented by H1 (N/1 cm□), H2 (N/1 cm□), or H3 (N/1 cm□), relationships of V1

    Foam sheet
    4.
    发明授权
    Foam sheet 有权

    公开(公告)号：US11511511B2

    公开(公告)日：2022-11-29

    申请号：US16960136

    申请日：2018-12-17

    Applicant: NITTO DENKO CORPORATION

    Inventor： Hideyuki Tokuyama ,  Makoto Saito

    IPC: B32B5/18 ,  C09J7/38 ,  C09J7/26 ,  B32B27/06 ,  B32B27/30

    Abstract: Provided is a foam sheet that can raise an electrostatic capacitance at the time of compression, and hence can improve sensitivity when used for an electrostatic capacitance sensor. The foam sheet includes: a foam layer; and a pressure-sensitive adhesive layer arranged on at least one side of the foam layer, wherein the foam sheet has a dielectric constant increase amount Q-P at 10% compression of 0.2 (F/m) or more, where P (F/m) represents a dielectric constant of the foam sheet immediately after the foam sheet has been left at rest under conditions of a temperature of 23° C. and a humidity of 50% for 2 hours, and Q (F/m) represents a dielectric constant of the foam sheet at a time when the foam sheet is compressed by 10% immediately after being left at rest under the conditions of a temperature of 23° C. and a humidity of 50% for 2 hours.

    Foamed sheet
    5.
    发明授权
    Foamed sheet 有权

    公开(公告)号：US10316156B2

    公开(公告)日：2019-06-11

    申请号：US15101555

    申请日：2015-09-18

    Applicant: NITTO DENKO CORPORATION

    Inventor： Kohei Doi ,  Kazumichi Kato ,  Hideyuki Tokuyama ,  Tadao Takahashi

    IPC: B32B5/18 ,  C08J5/18 ,  C08J9/00 ,  C08J9/12 ,  C08J9/30 ,  C08J9/36 ,  C09J7/26 ,  B32B27/06 ,  B32B27/28 ,  C09J201/00

    Abstract: There is provided a foamed sheet which takes only a short time to recover the thickness thereof after being compressed, and even if being subjected to repeated impacts, hardly decreases in the impact absorption. The foamed sheet according to the present invention comprises a foamed body formed of a resin composition comprising: a thermoplastic resin a and a silicone-based compound b having not more than 2,000 siloxane bonds; and/or a thermoplastic resin a′ having a silicone chain having not more than 2,000 siloxane bonds. The thermoplastic resin a is preferably at least one selected from the group consisting of acrylic polymers, rubbers, urethanic polymers and ethylene-vinyl acetate copolymers. The silicone-based compound b is preferably at least one selected from the group consisting of silicone oils, modified silicone oils and silicone resins.

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