Laminated film and method for manufacturing laminated film

By employing a phase separation structure of polyester substrate film and resin sheet in the laminated film, the problem of balancing the smoothness and sliding properties of the resin sheet is solved, achieving high smoothness and good sliding properties, thereby improving the performance of optical and electronic components.

CN119585113BActive Publication Date: 2026-06-26TOYOBO CO LTD
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Patent Information

Application Number
CN202380054544.3
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Priority Date
2022-07-20
Filing Date
2023-07-18
Publication Date
2026-06-26
Estimated Expiration
2043-07-18

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Abstract

Provided is a laminated film that can provide a resin sheet having both high smoothness and good slidability. A laminated film having a base film of a polyester-based material, a release layer disposed on at least one side of the base film, and a resin sheet disposed on the side of the release layer opposite the base film, the laminated film satisfying the following: the resin sheet is obtained by curing a resin sheet-forming composition containing at least a resin component (A) and a crosslinking agent (B), the resin sheet contains substantially no particles, the film thickness (t1) of the resin sheet is 1 μm or more and 20 μm or less, the arithmetic mean height (Sa) of the surface (1) of the resin sheet is 2 nm or more and 30 nm or less, and the surface free energy of the surface (2) of the resin sheet on the side of the release layer, measured after the resin sheet is peeled from the laminated film, is 45 mJ / m 2 Hereinafter, the static friction coefficient measured by overlapping the surface (1) of the resin sheet opposite the release layer with the surface (2) of the resin sheet on the side of the release layer is 1.5 or less.
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Citation Information

Patent Citations

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