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    REACTIVE PRESSURE-SENSITIVE ADHESIVE ELEMENT
    2.
    发明公开
    REACTIVE PRESSURE-SENSITIVE ADHESIVE ELEMENT 审中-公开

    公开(公告)号：US20240360343A1

    公开(公告)日：2024-10-31

    申请号：US18643234

    申请日：2024-04-23

    Applicant: tesa SE

    Inventor： Stefan Kramp ,  Michael Egger

    IPC: C09J7/38 ,  C09J7/26 ,  C09J11/08 ,  C09J133/10

    CPC classification number: C09J7/385 ,  C09J7/26 ,  C09J11/08 ,  C09J133/10 ,  C09J2301/1242 ,  C09J2301/302 ,  C09J2301/312 ,  C09J2301/416 ,  C09J2301/50 ,  C09J2423/00 ,  C09J2433/00

    Abstract: A reactive pressure-sensitive adhesive element that includes: i) a carrier layer; ii) a first adhesive layer arranged on a first surface of the carrier layer that comprises a first UV-curable pressure-sensitive adhesive; and iii) a second adhesive layer arranged on a second surface of the carrier layer facing away from the first surface, wherein the second adhesive layer comprises a second UV-curable pressure-sensitive adhesive. Each of the first and second UV-curable pressure-sensitive adhesives, based on a mass of the respective pressure-sensitive adhesive, comprises: x) one or more poly (meth) acrylate compounds in a combined mass fraction from 35% to 85%; y) one or more polymerizable epoxy compounds in a combined mass fraction from 10% to 50%; and z) one or more photoinitiators in a combined mass fraction from 0.1% to 5%. Further, the carrier layer comprises a foam carrier, the foam carrier comprising one or more polyolefins.

    PRESSURE-SENSITIVE ADHESIVE SHEET
    3.
    发明公开
    PRESSURE-SENSITIVE ADHESIVE SHEET 审中-公开

    公开(公告)号：US20240343949A1

    公开(公告)日：2024-10-17

    申请号：US18294708

    申请日：2021-12-16

    Applicant: NITTO DENKO CORPORATION

    Inventor： Kazumichi KATO ,  Shusaku UENO ,  Takamasa HIRAYAMA

    IPC: C09J7/38 ,  C09J133/08

    CPC classification number: C09J7/385 ,  C09J133/08 ,  C09J2203/326 ,  C09J2301/312 ,  C09J2467/006

    Abstract: A pressure-sensitive adhesive sheet having a pressure-sensitive adhesive layer of which adhesive face has wettability difficult to change even when exposed to an atmospheric environment, and on which positional deviation or drop is difficult to occur in conveying an electronic component. The pressure-sensitive adhesive layer has an adhesive face protected by a release liner and has a displacement of water contact angles θ1 and θ2 against the adhesive face 10a under the following conditions T1 and T2 of 5° or less:



    T1: immediately after separating the release liner R1 under an environment of 23° C.
    T2: after 2 hour exposure of the adhesive face 10a to an atmospheric environment after separating the release liner R1 under an environment of 23° C.
    θ1: water contact angle (°) of the adhesive face 10a under T1
    θ2: water contact angle (°) of the adhesive face 10a under T2






    Displacement R(°)=θ2−θ1.

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