公开(公告)号：US20250059409A1

公开(公告)日：2025-02-20

申请号：US18722876

申请日：2022-12-14

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Fuguo XU ,  Weilin LI ,  Jie WANG ,  Min LI

IPC: C09J7/38 ,  C08K5/315 ,  C09J7/10 ,  C09J133/06

Abstract: This application provides an adhesive film and a preparation method thereof, a composite assembly, and an electronic device. The adhesive film is prepared through a cross-linking reaction of a prepolymer. The prepolymer includes an alkyl acrylate soft monomer and an acrylate polar monomer. A mass fraction of the alkyl acrylate soft monomer in the prepolymer is greater than or equal to 60 wt %. A mass fraction of the acrylate polar monomer in the prepolymer is less than 30 wt %. The adhesive film provided in this application has an excellent low modulus at a low temperature and a high creep recovery rate, and can be used to improve a service life of a foldable electronic device in repeated folding processes.