Polyester film
A polyester film with a specific resin composition and controlled stretching addresses flexibility and heat resistance issues, achieving balanced properties for display applications.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- MITSUBISHI CHEM CORP
- Filing Date
- 2022-10-07
- Publication Date
- 2026-06-02
AI Technical Summary
Existing polyester films exhibit insufficient flexibility in the width direction (TD), high retardation leading to anisotropy, and poor heat resistance, making them unsuitable for applications requiring balanced physical properties and flexibility in both directions, especially in display technologies.
A polyester film with a resin composition having a glass transition temperature of 80 to 130°C and intrinsic birefringence of 0.0350 or less, composed of bisphenol A and 1,4-cyclohexanedimethanol, optionally with a polycarbonate component, and controlled stretching to achieve low retardation and high heat resistance.
The film demonstrates excellent flexibility, heat resistance, and low retardation, suitable for displays, particularly flexible displays, by maintaining balanced physical properties in both longitudinal and width directions.
Smart Images
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