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Patent Searching and Data


Title:
LAMINATE FILM, POLARIZING PLATE, DISPLAY DEVICE, AND METHOD FOR MANUFACTURING POLARIZING PLATE ROLL
Document Type and Number:
WIPO Patent Application WO/2021/201209
Kind Code:
A1
Abstract:
The present invention has the object of providing a laminate film that is a thin film but that can be handled in the same manner as a conventional polarizing plate protective film, further has excellent drying properties, dimensional stability, and curl control performance during polarizing plate processing, and has improved productivity with regard to polarizing plate processing; the present invention also has the object of providing a polarizing plate equipped with this laminate film, a high-quality display device having no light leakage or optical unevenness, and a method for manufacturing a polarizing plate roll. This laminate film is formed by laminating at least a detachable functional layer on a base material film, and is characterized in that the layer thickness of the functional layer is in a range of 1-19 μm, the moisture permeability of the base material film at a temperature of 40°C and humidity of 90% RH is in a range of 100-400 g/m2·24h, the maximum dimensional change rate in the film plane of the base material film at a temperature of 23°C and humidity of 20-80% RH is in a range of 0.01-0.10%, and the thickness of the base material film is in a range of 20-60 μm.

Inventors:
TAKEBE TAKASHI (JP)
OKUBO YASUSHI (JP)
Application Number:
PCT/JP2021/014133
Publication Date:
October 07, 2021
Filing Date:
April 01, 2021
Export Citation:
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Assignee:
KONICA MINOLTA INC (JP)
International Classes:
G02B5/30; B32B7/022; B32B27/30; B32B27/32; B32B27/36; G02F1/1335
Attorney, Agent or Firm:
KOYO INTERNATIONAL PATENT FIRM (JP)
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