Adhesive tape
WO2025244114A1PCT designated stage Publication Date: 2025-11-27SEKISUI CHEMICAL CO LTD
Patent Information
- Application Number
- PCT/JP2025/018641
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-05-31
- Filing Date
- 2025-05-23
- Publication Date
- 2025-11-27
AI Technical Summary
Technical Problem
Adhesive tapes used in curved displays face challenges in maintaining high-temperature retention while ensuring excellent curve-conforming properties due to increased flexibility, which compromises bulk strength.
Method used
A pressure-sensitive adhesive tape with a specific (meth)acrylic copolymer composition, adjusted for shear storage modulus, loss tangent peak temperature, and gel fraction, to achieve high-temperature retention and curved surface conformability.
Benefits of technology
The adhesive tape exhibits excellent high-temperature retention and curved surface conformability, with improved stress dispersion and drop impact resistance.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure JPOXMLDOC01-APPB-T000001 
Figure JPOXMLDOC01-APPB-T000002 
Figure JPOXMLDOC01-APPB-T000003
Abstract
The purpose of the present invention is to provide an adhesive tape excellent in high temperature holding properties and curved surface followability. The present invention is an adhesive tape having an adhesive layer formed using an adhesive composition, wherein the adhesive composition contains a (meth)acrylic copolymer, the (meth)acrylic copolymer has a constituent unit derived from an alkyl (meth)acrylate, the adhesive layer has a shear storage elastic modulus of 15000 Pa or more at 80°C as measured by dynamic viscoelasticity measurement at a measurement frequency of 1 Hz in a measurement temperature range of -40°C to 200°C, the peak temperature of a loss tangent of the adhesive layer as measured by dynamic viscoelasticity measurement at a measurement frequency of 1 Hz in a measurement temperature range of -40°C to 200°C falls within the range of -20°C to 0°C, and the adhesive layer has a gel fraction of 10%-45% by mass.
Need to check novelty before this filing date? Find Prior Art
Citation Information
Patent Citations
Light shielding adhesive tape and liquid crystal display module
JP2009084364A
Double-sided adhesive tape
JP2009084367A
Self-adhesive, double-sided pressure-sensitive adhesive sheet, and display
JP2010065095A
Method for producing acrylic pressure-sensitive adhesive
JP2015092003A
Adhesive composition, adhesive sheet and image display device
JP2017095659A