公开(公告)号：US12043775B2

公开(公告)日：2024-07-23

申请号：US16345519

申请日：2017-08-28

Applicant: RIKEN TECHNOS CORPORATION

Inventor： Hitomi Inomata ,  Takio Wakugawa

IPC: C09J7/38 ,  B32B7/12 ,  B32B27/00 ,  B32B27/30 ,  C09J7/24 ,  C09J133/00 ,  C09J133/10 ,  C09J175/04

CPC classification number: C09J7/38 ,  B32B7/12 ,  B32B27/00 ,  B32B27/30 ,  B32B27/304 ,  C09J7/245 ,  C09J133/00 ,  C09J133/10 ,  C09J175/04 ,  B32B2333/12 ,  B32B2607/02

Abstract: In one embodiment, there is provided an adhesive film having (α) a layer of polyvinyl chloride resin film and (β) an adhesive layer in the stated order from the surface-layer side, where the (β) adhesive layer is formed from an adhesive including: (A) 100 parts by mass of an acrylic polymer that satisfies the features (a1) and (a2), specifically (a1) an acid value of 18-27 mg KOH/g, and (a2) a mass-average molecular weight of 500,000 to 1,000,000; and (B) 0.1-3 parts by mass of a compound having two or more isocyanate groups per molecule. In another embodiment, there is provided an adhesive film having (α) a layer of polyvinyl chloride resin film and (β) an adhesive layer in the stated order from the surface-layer side, where the (β) adhesive layer has a tackiness of 12-25 N at a surface temperature of 5° C. and has a tackiness of 12-23 N at a surface temperature of 35° C.