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：US20210089159A1

公开(公告)日：2021-03-25

申请号：US17029597

申请日：2020-09-23

Applicant: LINTEC CORPORATION

Inventor： Hiroki HOSHINO ,  Yuka FUJII

IPC: G06F3/041 ,  G06F3/0354

Abstract: A writing feel improving sheet having a touch pen contact surface with which a touch pen comes into contact, the touch pen contact surface having an indentation depth of 10 μm or more and 30 μm or less when a test load reaches 1961 mN upon indentation with a tip of a triangular pyramid-shaped indenter at a load speed of 1 mN/s, the triangular pyramid-shaped indenter having a tip curvature radius of 100 nm and an inter-ridge angle of 115°.