Pressure-sensitive adhesive for quick-tearing polaroid, preparation method of pressure-sensitive adhesive and protective film

By using a formulation that incorporates long-chain ether monomers and antistatic agents in the polarizer protective film, a low-tack, quick-tear pressure-sensitive adhesive was prepared, solving the problems of insufficient peel force and poor antistatic performance in existing technologies, and achieving efficient peeling and antistatic effects.

CN121851933APending Publication Date: 2026-04-14SIDIKE NEW MATERIALS (JIANGSU) CO LTD +1
0 Cites 0 Cited by

Patent Information

Application Number
CN202512050793.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-31
Publication Date
2026-04-14

AI Technical Summary

Technical Problem

Existing polarizer protective films have insufficient peel strength under rapid peeling conditions, making it difficult to meet the requirements of low basis weight and no residue under high temperature conditions, and their antistatic properties are also insufficient.

Method used

The polymer formulation incorporates long-chain ether-bonded monomer methoxy polyethylene glycol methacrylate, and a quick-tear pressure-sensitive adhesive is prepared through a specific process. Combined with antistatic agents and crosslinking agents, a low-tack coating is formed, which is then applied to the substrate and cured to form a protective film.

Benefits of technology

It achieves low peel force below 50gf/25mm, improves peeling efficiency, reduces adhesive surface resistance, enhances antistatic effect, and ensures no adhesive residue and no afterimages under high temperature conditions.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a pressure-sensitive adhesive for a quick-tearing polaroid, a preparation method of the pressure-sensitive adhesive and a protective film. The pressure-sensitive adhesive comprises the following raw materials in parts by weight: 100 parts of a polymer, 0.5-1 part of an antistatic agent, 1-3 parts of a cross-linking agent and 20-40 parts of a diluent, wherein the polymer is prepared from the following raw materials in parts by weight: 70 to 90 parts of 2-ethylhexyl acrylate, 5 to 10 parts of a functional monomer, 10 to 30 parts of methoxy polyethylene glycol methacrylate, 0.02 to 0.1 part of an initiator and 55 to 60 parts of a solvent. The stripping force of a conventional polaroid protective film in fast tearing is generally 50-100 gf / 25 mm, the long-chain ether bond monomer, namely methoxyl polyethylene glycol methacrylate, is added, so that the stripping force of fast tearing is effectively reduced to 50 gf / 25 mm or below, the efficiency of the application process is higher, meanwhile, a large number of ether bonds and hydroxyl groups form a hydrophilic structure, static electricity is more favorably released, and the service life of the polaroid protective film is prolonged. The resistance value of the rubber surface is reduced, so that the antistatic effect is better.
Need to check novelty before this filing date? Find Prior Art