公开(公告)号：US20230272247A1

公开(公告)日：2023-08-31

申请号：US17910119

申请日：2020-12-02

Applicant: LINTEC CORPORATION

Inventor： Yoichi TAKAHASHI ,  Sho KOSABA ,  Yuka FUJII

IPC: C09J7/38 ,  C09J7/10 ,  C09J11/06

CPC classification number: C09J7/385 ,  C09J7/10 ,  C09J11/06 ,  C09J2203/354 ,  C09J2301/312 ,  C09J2301/416

Abstract: An adhesive sheet (1) comprising an adhesive layer (11) composed of an adhesive having active energy ray curability and ultraviolet ray absorbability, wherein when one surface of the adhesive layer (11) is irradiated with ultraviolet rays having a light amount of 2000 mJ/cm2 to cure the adhesive layer (11) and an infrared absorption spectrum is then measured by a total reflection measurement method for each of an irradiated surface and a non-irradiated surface, the maximum value of the absolute value of absorbance is 0.0001 to 0.012 within a wavenumber range of 700 to 1000 cm−1 in a difference spectrum obtained by subtracting the infrared absorption spectrum of the non-irradiated surface from the infrared absorption spectrum of the irradiated surface, and when the adhesive layer (11) is irradiated with ultraviolet rays having a light amount of 2000 mJ/cm2 to cure the adhesive layer (11), the difference in a gel fraction of the adhesive constituting the adhesive layer (11) before and after the irradiation is 5 points or more and 50 points or less. According to such an adhesive sheet (1), both the light resistance and the blister resistance can be achieved satisfactorily.

公开(公告)号：US20240052210A1

公开(公告)日：2024-02-15

申请号：US18277853

申请日：2021-10-29

Applicant: LINTEC CORPORATION

Inventor： Sho KOSABA ,  Yoichi TAKAHASHI

IPC: C09J7/38 ,  C09J11/04 ,  C09J7/10 ,  H01L25/075 ,  B32B7/12

CPC classification number: C09J7/385 ,  C09J11/04 ,  C09J7/10 ,  H01L25/0753 ,  B32B7/12 ,  G02F2202/28 ,  G02F1/133606

Abstract: A pressure sensitive adhesive sheet having a pressure sensitive adhesive layer that includes at least one colored pressure sensitive adhesive layer, the colored pressure sensitive adhesive layer having a pressure sensitive adhesive that contains a colorant, the pressure sensitive adhesive layer having a lightness L* of 90 or less as defined by a CIE 1976 L*a*b* color system, the pressure sensitive adhesive layer having a total luminous transmittance of 3% or more and a thermal conductivity of 0.1 W/m·K or more.

公开(公告)号：US20240158675A1

公开(公告)日：2024-05-16

申请号：US18283645

申请日：2021-10-25

Applicant: LINTEC CORPORATION

Inventor： Sho KOSABA ,  Yoichi TAKAHASHI

IPC: C09J7/38 ,  B32B7/023 ,  B32B7/06 ,  B32B7/12 ,  B32B27/08 ,  B32B27/30 ,  B32B37/12 ,  C09D133/08 ,  C09J5/00

CPC classification number: C09J7/385 ,  B32B7/023 ,  B32B7/06 ,  B32B7/12 ,  B32B27/08 ,  B32B27/308 ,  B32B37/12 ,  C09D133/08 ,  C09J5/00 ,  B32B2307/4026 ,  B32B2307/412 ,  B32B2307/414 ,  B32B2307/54 ,  B32B2307/748 ,  C09J2301/208 ,  C09J2301/302 ,  C09J2301/408 ,  C09J2433/00

Abstract: A pressure sensitive adhesive sheet for bonding two rigid plates together, at least one of the two rigid plates having irregularities on a surface on a side to be bonded to the other rigid plate, the pressure sensitive adhesive sheet containing: a composite pressure sensitive adhesive layer containing an optically functional pressure sensitive adhesive layer and a transparent pressure sensitive adhesive layer that does not have an optical function of the optically functional pressure sensitive adhesive layer; and a release sheet laminated on the transparent pressure sensitive adhesive layer in the composite pressure sensitive adhesive layer, the composite pressure sensitive adhesive layer having a straightforward transmittance of 90% or less for light rays having a wavelength of 550 nm. According to such a pressure sensitive adhesive sheet, uneven optical function in the pressure sensitive adhesive layers can be suppressed.