公开(公告)号：WO2021240435A2

公开(公告)日：2021-12-02

申请号：PCT/IB2021/054651

申请日：2021-05-27

申请人： 3M INNOVATIVE PROPERTIES COMPANY

发明人： CHOI, Bo-Kyung ,  JUNG, Seunghoon

IPC分类号： C09J7/26 ,  C09J7/29 ,  B32B5/00 ,  B32B2255/10 ,  B32B2255/102 ,  B32B2266/025 ,  B32B2266/0278 ,  B32B2266/0292 ,  B32B2266/06 ,  B32B2266/08 ,  B32B2307/54 ,  B32B2307/72 ,  B32B2307/732 ,  B32B2405/00 ,  B32B2457/20 ,  B32B27/065 ,  B32B27/36 ,  B32B3/30 ,  B32B5/18 ,  B32B5/32 ,  C09J2203/318 ,  C09J2203/326 ,  C09J2301/124 ,  C09J2301/312 ,  C09J2400/243 ,  C09J2475/006 ,  C09J7/22

摘要： The present invention related to a double-sided adhesive tape. Specifically, according to an embodiment of the present invention, there is provided a double-sided adhesive tape including a carrier layer; a foam layer including a plurality of open cells; and a film layer having a protrusion protruding toward the foam layer, wherein the protrusion fills at least some of the plurality of open cells to bond the film layer and the foam layer, and is bonded to the at least some thereof.

公开(公告)号：WO2021250634A1

公开(公告)日：2021-12-16

申请号：PCT/IB2021/055175

申请日：2021-06-11

申请人： 3M INNOVATIVE PROPERTIES COMPANY

发明人： YAN, Xue Wen ,  YANG, Chao ,  XU, Zhiyong ,  SUN, Xin Xin ,  ZHANG, Wei Jun

IPC分类号： C09J7/29 ,  C09J7/38 ,  B32B7/06 ,  B32B27/08 ,  C09J7/10 ,  B60R13/08 ,  C09J2203/318 ,  C09J2301/124 ,  C09J2301/302 ,  C09J2415/00 ,  C09J2421/00 ,  C09J2423/006 ,  C09J2433/00 ,  C09J2483/00 ,  C09J7/241

摘要： Disclosed is a damping adhesive film for screen sounding technology, the damping adhesive film comprising: a first pressure-sensitive adhesive layer; a second pressure- sensitive adhesive layer; and a damping layer disposed between the first and second pressure-sensitive adhesive layers. The first and second pressure-sensitive adhesive layers each independently comprise an acrylic pressure-sensitive adhesive, an organosilicone-based pressure-sensitive adhesive, a rubber-based pressure-sensitive adhesive, or any combination thereof. The damping layer comprises an α-olefin polymer or a blend thereof, wherein the glass transition temperature of the α-olefin polymer or the blend thereof is from −30°C to 50°C, the thickness of the damping layer is from 10 µm to 500 µm, and the storage modulus of the damping layer under the condition of 25°C is from 1 × 105 Pa to 1 × 107 Pa. Further disclosed is an electronic device comprising such a damping adhesive film, especially an electronic device adopting screen sounding technology. The damping adhesive film provided by the present invention has a specific structure and composition, and is capable of generating high damping for a specific frequency, and maintaining the loudness of screen sounding while smoothening a frequency response curve.