Laminated film, roll, laminated film with hard coat layer, method for manufacturing polarizing plate
CN115128724BActive Publication Date: 2026-08-28SUMITOMO CHEM CO LTD
Patent Information
- Application Number
- CN202210298684.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2021-03-25
- Filing Date
- 2022-03-22
- Publication Date
- 2026-08-28
- Estimated Expiration
- 2042-03-22
AI Technical Summary
Benefits of technology
[0025]根据本发明，可以提供一种层叠膜，其具备透明树脂膜和用于保护透明树脂膜的表面的膜，即使以卷绕体的形式长时间保管，也不易在透明树脂膜产生转印所致的凹凸缺陷。另外，可以提供由该层叠膜形成的卷绕体、以及具备该层叠膜的带有硬涂层的层叠膜。另外，可以提供使用了该层叠膜的偏振板的制造方法。
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Figure CN115128724B_ABST
Abstract
A laminated film, a roll body, a laminated film with a hard coat layer, and a method for manufacturing a polarizing plate. The present invention provides a laminated film that is not susceptible to the generation of unevenness defects due to transfer even when stored for a long time in the form of a roll body. The laminated film (1) is provided with a transparent resin film (2) and a surface protective film (3) that is peelably attached to the transparent resin film (2). The surface roughness (Sa1) (μm) of the face (2a) of the transparent resin film (2) after a prescribed load heat treatment is performed on the transparent resin film (2), and the surface roughness (Sa2) (μm) of the face (2a) of the transparent resin film (2) after a prescribed transfer acceleration treatment is performed on the transparent resin film (2) on which the prescribed load heat treatment is performed satisfy the following formula (1). Sa2-Sa1≤0…(1).
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Citation Information
Patent Citations
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