公开(公告)号：US20150037639A1

公开(公告)日：2015-02-05

申请号：US14449405

申请日：2014-08-01

Applicant: NITTO DENKO CORPORATION

Inventor： Yuichi TAKAMURA ,  Shigeki KAWABE ,  Tadashi TERASHIMA

IPC: H01M2/08 ,  C09J7/02 ,  H01M10/0587

CPC classification number: H01M2/08 ,  C09J7/22 ,  C09J7/38 ,  C09J7/383 ,  C09J2201/622 ,  C09J2203/33 ,  C09J2421/00 ,  C09J2423/00 ,  C09J2423/106 ,  H01M10/0525 ,  H01M10/0587 ,  Y10T428/28 ,  Y10T428/2878

Abstract: Disclosed is a pressure-sensitive adhesive tape or sheet which does not cause deterioration of an electrolytic solution even when immersed in the electrolytic solution and which can be smoothly unwound even after being wound. The pressure-sensitive adhesive tape or sheet includes a substrate and, on one surface thereof, a pressure-sensitive adhesive layer. The substrate has a wetting tension of from 30 to 35 mN/m in the surface to face the pressure-sensitive adhesive layer, where the wetting tension is measured by a method according to JIS K 6768:1999. The pressure-sensitive adhesive layer includes a pressure-sensitive adhesive containing substantially no polar group. A pressure-sensitive adhesive in the pressure-sensitive adhesive layer is preferably a rubber pressure-sensitive adhesive such as a polyisobutylene rubber and/or an isobutylene-isoprene rubber.

Abstract translation: 公开了即使浸入电解液中也不会使电解液劣化的粘合带或片材，即使在卷绕后也能平滑地退绕。 压敏粘合带或片材包括基材，并且在其一个表面上具有压敏粘合剂层。 衬底在面对压敏粘合剂层的表面上具有30至35mN / m的润湿张力，其中通过根据JIS K 6768：1999的方法测量润湿张力。 压敏粘合剂层包括基本上不含极性基团的压敏粘合剂。 粘合剂层中的压敏粘合剂优选为聚异丁烯橡胶和/或异丁烯 - 异戊二烯橡胶等橡胶压敏粘合剂。

公开(公告)号：US20230019449A1

公开(公告)日：2023-01-19

申请号：US17781913

申请日：2020-12-03

Applicant: NITTO DENKO CORPORATION

Inventor： Hiroki KIGAMI ,  Yuichi TAKAMURA ,  Eisuke KUROGI ,  Kodai UEDA

IPC: B01D39/16 ,  B01D71/36 ,  B01D69/02 ,  B01D69/06 ,  B01D69/12 ,  B01D67/00

Abstract: A provided stretched porous polytetrafluoroethylene membrane has a node-fibril structure including a plurality of nodes and a fibril connecting the plurality of nodes. A ratio of an average length of the plurality of nodes in a thickness direction of the stretched porous polytetrafluoroethylene membrane to a thickness of the stretched porous polytetrafluoroethylene membrane is 10% or more. The above stretched porous polytetrafluoroethylene membrane is less likely to suffer breakage. In the above stretched porous polytetrafluoroethylene membrane, assuming that there is a cuboid region having an upper surface and a lower surface respectively positioned at one membrane surface and the other membrane surface of the stretched porous polytetrafluoroethylene membrane, the number of the nodes included in the region may be 4 or less per micrometer thickness, the upper surface and the lower surface each having dimensions of 280 μm×280 μm.

公开(公告)号：US20210340409A1

公开(公告)日：2021-11-04

申请号：US17258941

申请日：2019-07-10

Applicant: NITTO DENKO CORPORATION

Inventor： Yuichi TAKAMURA ,  Yoshinari TAKAYAMA

IPC: C09J7/38 ,  C09J7/24 ,  C09J183/04

Abstract: An adhesive tape includes: a substrate made of a fluorine resin; and a silicone-based adhesive agent layer disposed on one surface of the substrate. The adhesive tape has a thickness of 50 μm or more. An adhesive strength of an adhesive surface to the other surface of the substrate after a friction test is 4.0 N/19 mm or more. The friction test is performed according to a test method for coefficient of friction specified in JIS K7125: 1999, and performed in a state where: a contact surface, of a sliding piece used in the test method, brought into contact with a surface to be tested is covered with a single fiber cloth (cotton, for friction) specified in JIS L0803: 2011; the other surface of the substrate is defined as the surface to be tested; and the number of times of reciprocation is set to 10 times.

公开(公告)号：US20220298400A1

公开(公告)日：2022-09-22

申请号：US17635558

申请日：2020-09-24

Applicant: NITTO DENKO CORPORATION

Inventor： Yuichi TAKAMURA ,  Kurato AKIBA

IPC: C09J183/04 ,  C08J5/18 ,  C09J7/38 ,  C09J7/24 ,  C08K3/22

Abstract: A fluororesin sheet of the present invention is a sheet mainly including a fluororesin, having a blackness of 30 or less as expressed in terms of L* value in an L*a*b* color system, and having a surface resistivity of 1×1010 Ω/sq or more. The fluororesin sheet of the present invention may be a sheet mainly including a fluororesin and including a composite oxide black filler. An adhesive tape of the present invention includes a substrate sheet and an adhesive layer provided on one of surfaces of the substrate sheet, and the substrate sheet is one of the above fluororesin sheets. The fluororesin sheet and the adhesive tape of the present invention unprecedentedly have a high degree of freedom in application development.

公开(公告)号：US20250018350A1

公开(公告)日：2025-01-16

申请号：US18709940

申请日：2022-11-08

Applicant: NITTO DENKO CORPORATION

Inventor： Kodai UEDA ,  Yu KAMAMOTO ,  Yuichi TAKAMURA ,  Satoru FURUYAMA

IPC: B01D71/32 ,  B01D71/52

Abstract: An air-permeable filter includes a porous fluorine resin membrane having one principal surface and the other principal surface, and treated with an oil-repellent agent for oil-repellency. In a measurement of its absorption spectrum by Fourier-transform infrared spectroscopy, an absorbance ratio Rf of the one principal surface and an absorbance ratio Rb of the other principal surface calculated by Aa/Am are not substantially the same. The Aa indicates an absorbance at a peak derived from the oil-repellent agent in the absorption spectrum, and the Am indicates an absorbance at a peak derived from a C—F bond in the absorption spectrum.

公开(公告)号：US20230025947A1

公开(公告)日：2023-01-26

申请号：US17781905

申请日：2020-12-03

Applicant: NITTO DENKO CORPORATION

Inventor： Yuichi TAKAMURA ,  Hiroki KIGAMI ,  Eisuke KUROGI ,  Kodai UEDA

IPC: B01D39/16 ,  B01D46/54 ,  C08J9/28

Abstract: A provided stretched porous polytetrafluoroethylene membrane has an air permeability of 4 cm3/(sec·cm2) or more, as expressed in terms of Frazier air permeability, in a thickness direction, and has a total cohesion of 1.9 (N/20 mm)2 or more, the total cohesion being expressed by a product of a peel cohesion in a first in-plane direction and a peel cohesion in a second in-plane direction perpendicular to the first direction. The above stretched porous membrane is highly air-permeable and, for example, when included in a filter member, being less likely to suffer breakage at the time of handling the member or placing the member on a housing or the like.