Title:
BIAXIALLY ORIENTED THERMOPLASTIC RESIN FILM
Document Type and Number:
Japanese Patent JPH03140336
Kind Code:
A
Abstract:
PURPOSE:To obtain the subject film having particular surface and excellent abrasion resistance and electrical insulation and suitable for magnetic recording medium, packaging film, capacitor film, etc., by using a thermoplastic resin containing inert particles such as spherical titanium oxide particles having a specific particle diameter as a main component. CONSTITUTION:The objective film having a thickness of 0.01-3mum is composed of (A) a thermoplastic resin (e.g. a crystalline polyester having a total reflection Raman crystallization index of <=20cm<-1>) and (B) 2-20wt.% of inert particles dispersed in the resin, having an average particle diameter corresponding to 0.2-5 times the thickness of the film and a relative standard deviation of <=0.6 and selected from spherical titanium oxide particle, spherical tungsten oxide particle, spherical molybdenum oxide particle and spherical silicone particle. Since the film has specific surface structure, the friction coefficient can be compatibilized with the output characteristics of a magnetic recording medium in high dimensional viewpoint and the film is useful for improving the picture quality of a video tape.
Inventors:
OKAZAKI IWAO
ABE KOICHI
NAKAJIMA SHOJI
ABE KOICHI
NAKAJIMA SHOJI
Application Number:
JP28070289A
Publication Date:
June 14, 1991
Filing Date:
October 27, 1989
Export Citation:
Assignee:
TORAY INDUSTRIES
International Classes:
B32B27/36; B29C55/12; C08J5/18; B29K67/00; B29L7/00; B29L9/00; (IPC1-7): B29C55/12; B29K67/00; B29L7/00; B29L9/00; B32B27/36; C08J5/18
Domestic Patent References:
| JPH01126340A | 1989-05-18 | |||
| JPH02214657A | 1990-08-27 |