Manufacture of liquid crystalline polymer film and sheet

Abstract

Abstract PURPOSE:To control a fibrillating phenomenon and ply separation, by a method wherein a film or a sheet comprised of thermotropic liquid crystalline polyester is surface- processed within a temperature range between the glass transition temperature or higher and the melting temperature or lower and within a specific range of surface roughness. CONSTITUTION:A film or a sheet comprised of thermotropic liquid crystalline polyester is surface-processed within a temperature range between the glass transition temperature or higher and the melting temperature or lower of the film or sheet and at surface roughness of SPz (ten-point mean roughness) and within a range of 1/20-1/2 of a film thickness. When surface processing is performed at a temperature of at least the melting point, deterioration of a film is great and becomes worthless as aproduct. When the surface roughness of the film is the SRz and not exceeding 1/20 of the film thickness, ply separation is not dissolved and when the surface processing is performed under at least 1/2 of the film thickness, damage to be given to the film is great and capacity of the film is deteriorated greatly. With this surface processing, fibrillation or the ply separation is controlled while keeping physical properties or molecular orientation of a liquid crystalline polymeric film or sheet.

Inventors

• 👤 Eiji Yamamoto
• 👤 英治 山本
• 👤 Minoru Kishida
• 👤 稔 岸田

Bibliographic Details