Adhesive tape
A pressure-sensitive adhesive tape with a specific glass transition temperature and (meth)acrylic copolymer composition addresses adhesive strength and color retention issues, ensuring effective bonding and color stability under high-temperature, high-humidity conditions.
JP2025178218APending Publication Date: 2025-12-05SEKISUI CHEMICAL CO LTD
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Patent Information
- Application Number
- JP2025086501
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-05-24
- Filing Date
- 2025-05-23
- Publication Date
- 2025-12-05
AI Technical Summary
Technical Problem
Thinner adhesive tapes used in electronic devices face challenges with reduced adhesive strength and yellowing under high-temperature, high-humidity environments, affecting the performance of LED backlights and image display devices.
Method used
A pressure-sensitive adhesive tape with a specific glass transition temperature range and a (meth)acrylic copolymer composition, including a tackifier resin, is developed to improve adhesion and minimize color change under high-temperature, high-humidity conditions.
Benefits of technology
The adhesive tape maintains excellent adhesion and color tone retention, with minimal color change (Δb* ≤ 2.00) after exposure to 60°C and 90% RH for 120 hours, suitable for bonding LED backlights and other components.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide an adhesive tape excellent in adhesion to an adherend, and excellent in color tone retention even when exposed to a high temperature and high humidity environment.SOLUTION: An adhesive tape includes an adhesive layer formed with an adhesive composition, wherein the adhesive composition contains a (meth)acrylic copolymer and a tackifier resin, the adhesive layer has a glass transition temperature of -10°C or higher and 20°C or lower, and an amount of change in b* measured in color difference measurement before and after heating is 2.00 or less when the adhesive tape is heated for 120 hours under an environment of 60°C, 90% RH.SELECTED DRAWING: None
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