公开(公告)号：US20150030795A1

公开(公告)日：2015-01-29

申请号：US14505766

申请日：2014-10-03

Applicant: Nitto Denko Corporation

Inventor： Takuma OGAWA ,  Shinji INOKUCHI ,  Eiji YAMANAKA ,  Naoaki HIGUCHI ,  Tetsuya HIROSE

IPC: C09J7/02

CPC classification number: C09J7/22 ,  C08L33/10 ,  C08L2205/02 ,  C09J4/00 ,  C09J7/203 ,  C09J133/06 ,  C09J133/08 ,  C09J2201/128 ,  C09J2201/36 ,  C09J2201/606 ,  C09J2205/102 ,  C09J2205/11 ,  C09J2423/006 ,  C09J2423/045 ,  C09J2433/00 ,  Y10T428/1452 ,  Y10T428/1476 ,  C08F2220/1858 ,  C08F220/06 ,  C08F2222/1013 ,  C08F220/18

Abstract: A pressure-sensitive adhesive tape includes: a pressure-sensitive adhesive layer that contains at least a fine particle and/or a bubble and both the surfaces of which are pressure-sensitive adhesive surfaces; and a release liner having both a first release layer that is provided on one surface of the pressure-sensitive adhesive layer so as to contact the one surface and a second release layer located opposite to the first release layer. The thickness of the pressure-sensitive adhesive layer is 0.2 to 2.0 mm. The second release layer of the release liner is structured such that a holding time measured by a predetermined method is 2500 minutes or longer.

Abstract translation: 压敏粘合带包括：至少含有细颗粒和/或气泡并且其两个表面都是压敏粘合剂表面的压敏粘合剂层; 以及剥离衬垫，其具有设置在所述压敏粘合剂层的一个表面上以与所述一个表面接触的第一释放层和与所述第一剥离层相对的第二剥离层。 粘合剂层的厚度为0.2〜2.0mm。 隔离衬垫的第二释放层被构造成使得通过预定方法测量的保持时间为2500分钟以上。

公开(公告)号：US20210198532A1

公开(公告)日：2021-07-01

申请号：US17057996

申请日：2019-05-21

Applicant: NITTO DENKO CORPORATION

Inventor： Takuma OGAWA ,  Yoshio NAKAGAWA ,  Takeshi IGARASHI ,  Kaito YAMAMOTO

IPC: C09J7/38 ,  C09J133/06

Abstract: An objective is to provide a surface protective PSA sheet that has well-balanced bonding strength for various adherends differing in polarity and a capability to suppress peeling and lifting as well as an ability to inhibit touch-up paint peeling and an increase in bonding strength with time. The surface protective PSA sheet having a PSA layer and a resin substrate supporting the PSA layer, characterized by satisfying the following conditions (a1), (a1-1) and (c1) has well-balanced bonding strength for various adherends differing in polarity and is capable of suppressing peeling and lifting and inhibiting touch-up paint peeling and an increase in boding strength with time. (a1) The PSA layer is formed from a PSA composition comprising a (meth)acrylic copolymer and a tackifier, the tackifier accounting for 1.0-30 parts by mass of the PSA composition with the (meth)acrylic copolymer being 100 parts by mass. (a1-1) The (meth)acrylic copolymer comprises 0.1-2.8% by mass functional group-containing structural unit, the structural unit including at least one species of functional groups selected from the group consisting of a carboxyl group and a salt thereof as well as a sulfo group and a salt thereof. (c1) The surface protective PSA sheet has tensile moduli of elasticity of 180-330 MPa in both MD and TD.

公开(公告)号：US20130274361A1

公开(公告)日：2013-10-17

申请号：US13862607

申请日：2013-04-15

Applicant: NITTO DENKO CORPORATION

Inventor： Takuma OGAWA ,  Eiji YAMANAKA ,  Naoaki HIGUCHI ,  Shinji INOKUCHI

IPC: C09J133/08

CPC classification number: C09J133/08 ,  C09J7/10 ,  C09J2433/00

Abstract: A pressure-sensitive adhesive sheet according to an embodiment of the present invention has a pressure-sensitive adhesive layer including an acrylic polymer. This acrylic polymer contains, as monomer components, an acrylic monomer not containing a polar group (A) and a polar group-containing monomer (B). The 100% modulus of this pressure-sensitive adhesive layer is 20 to 200 N/cm2.

Abstract translation: 根据本发明实施方案的压敏粘合片具有包含丙烯酸类聚合物的压敏粘合剂层。 作为单体成分，该丙烯酸类聚合物含有不含极性基团（A）和极性基团单体（B）的丙烯酸类单体。 该压敏粘合剂层的100％模量为20〜200N / cm 2。

公开(公告)号：US20170232720A1

公开(公告)日：2017-08-17

申请号：US15502276

申请日：2015-07-14

Applicant: NITTO DENKO CORPORATION

Inventor： Kenichi NISHIKAWA ,  Takuma OGAWA

IPC: B32B27/30 ,  C09J7/02 ,  C09J133/08 ,  B32B7/12

Abstract: Provided is a PSA sheet that shows high peel strength to low polar adherends while having excellent flexibility. This invention provides a PSA sheet that comprises a PSA layer (A) constituting an adhesive face and a viscoelastic layer (B) supporting the PSA layer (A). In the PSA sheet, the viscoelastic layer (B) comprises hollow particles or have bubbles. The PSA layer (A) comprises an acrylic polymer (a) as the base polymer. The copolymerization ratio of an acidic group-containing monomer in the acrylic polymer (a) is 5% by weight or lower.