Laminate

JP7600596B2Active Publication Date: 2024-12-17TORAY INDUSTRIES INC
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Patent Information

Application Number
JP2020166719
Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2020-10-01
Publication Date
2024-12-17
Estimated Expiration
2040-10-01

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Patent Text Reader

Abstract

To provide a laminate having a resin film which is stretchable and excellent in restorability.SOLUTION: A laminate 4 has a release film A1 on one surface of a resin film 3 and a release film B2 on the other surface, in which the resin film includes a segment having an acrylate structure and a segment having an urethane structure, the resin film has a storage elastic modulus under conditions of a temperature of 25°C and a frequency of 1 Hz of 0.5 MPa or more and 55 MPa or less, and a loss tangent of 0.8 or less, and the laminate satisfies the following expressions 1 to 3. Expression 1: F10-F20≥20(mN / 50 mm). Expression 2: 1000>F11-F21≥20(mN / 50 mm). Expression 3: F11-F10≤10(mN / 50 mm). In the expressions 1 to 3, F10 and F20 are release forces of the release film, and F11 and F21 are release forces of B after the laminate is heated at 60°C for 96 hours.SELECTED DRAWING: Figure 1
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Citation Information

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