公开(公告)号：US20210079270A1

公开(公告)日：2021-03-18

申请号：US16956257

申请日：2018-12-27

Applicant: NITTO DENKO CORPORATION

Inventor： Kenji FURUTA ,  Tatsuya SUZUKI ,  Minami WATANABE

IPC: C09J7/38 ,  H05K5/06 ,  G01N19/10 ,  G11B33/14

Abstract: Provided is a PSA sheet having excellent moisture resistance with reduced gas emission.
The sheet body provided by this invention is a laminate sheet body having a PSA layer on at least one face. The sheet body has a moisture permeability of less than 90 μg/cm2 per 24 hour measurement period in in-plane direction of bonding interface of PSA layer, with the sheet body having an internal volume (bulk) forming a permeation channel that has a prescribed length of 2.5 mm, the moisture permeability determined based on a modified MOCON method, at a permeation cell temperature of 40° C., with humidistat gas at a temperature of 40° C. and 90% relative humidity supplied to a wet chamber. It also has an amount of thermally released gas of 10 μg/cm2 or less, determined at 130° C., over 30 minutes, by gas chromatography/mass spectrometry.

公开(公告)号：US20190077999A1

公开(公告)日：2019-03-14

申请号：US15771636

申请日：2017-11-20

Applicant: NITTO DENKO CORPORATION

Inventor： Hiroki IEDA ,  Tatsuya SUZUKI ,  Kenji FURUTA ,  Minami WATANABE ,  Takeshi NAKANO ,  Shogo SASAKI

IPC: C09J7/38 ,  C09J183/04 ,  C09J201/02

Abstract: The present invention provides a pressure-sensitive adhesive (PSA) sheet that achieves both low initial adhesiveness and strong adhesiveness upon use and has excellent transparency of the PSA layer. The PSA sheet provided herein includes a PSA layer having a haze value of 1.0% or less. The PSA sheet is configured so that a pressure-sensitive adhesive strength N1, after the PSA layer is attached to a stainless steel plate and left at 23° C. for 30 minutes, is 1.5 N/20 mm or less, and a pressure-sensitive adhesive strength N2, after the PSA layer is attached to a stainless steel plate and heated at 80° C. for 5 minutes, is 10.0 N/20 mm or more.

公开(公告)号：US20190071589A1

公开(公告)日：2019-03-07

申请号：US15766896

申请日：2017-11-20

Applicant: NITTO DENKO CORPORATION

Inventor： Hiroki IEDA ,  Tatsuya SUZUKI ,  Kenji FURUTA ,  Minami WATANABE ,  Takeshi NAKANO ,  Shogo SASAKI

IPC: C09J7/38 ,  B32B27/30 ,  B32B27/16 ,  C09J7/20 ,  C09J201/02 ,  C09J11/08 ,  C09J133/08

Abstract: The present invention provides a pressure-sensitive adhesive (PSA) sheet that achieves, in the form having a support substrate, both low initial adhesiveness and strong adhesiveness during use. The PSA sheet provided in this application includes a support substrate and a PSA layer laminated on at least one side of the support substrate. The PSA layer has a thickness of 3 μm or more but less than 100 μm. The support substrate has a thickness of 30 μm or more. The PSA sheet is configured so that a relationship between an elastic modulus Et′ [MPa] of the PSA sheet and a thickness Ts [mm] of the support substrate fulfils the following formula: 0.1 [N·mm]