Laminated film

WO2026063278A1PCT designated stage Publication Date: 2026-03-26TOYOBO CO LTD
View PDF 5 Cites 0 Cited by

Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2025-09-09
Publication Date
2026-03-26

AI Technical Summary

Technical Problem

Existing laminated films face challenges in easily detaching the release layer without using harsh chemicals, leading to environmental pollution and material waste, and the reuse of base films is hindered by foreign substances from the release layer composition.

Method used

A laminated film with a release layer composed of an aliphatic polyester resin and a curable siloxane resin, specifically containing a cationic curable siloxane resin with alicyclic epoxy groups, allows for easy detachment and recycling of the base film without the need for alkaline solutions or organic solvents.

Benefits of technology

The film enables easy separation and recycling of the base film, reducing environmental impact and maintaining the film's properties for reuse, while ensuring smooth detachment and preventing deterioration.

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

Abstract

The present disclosure addresses the problem of providing a laminated film in which an easily removable release layer is laminated directly on a substrate film. A laminated film according to the present disclosure has a release layer directly on at least one surface of a polyester film substrate, wherein the release layer contains at least an aliphatic polyester resin and a curable siloxane resin, and the curable siloxane resin content is 20-70 parts by mass, per 100 parts by mass of the aliphatic polyester resin.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Release sheet and adhesive sheet

    JP2011246552A

  • Release polyester film

    JP2014233966A

  • Release polyester film

    JP2014233967A

  • Mold release film for molding of resin sheet

    WO2022138484A1

  • Method for producing mold release film for resin sheet molding

    WO2022138485A1