To enhance sliding property of a thermoplastic polyimide film.
The polyimide film with enhanced sliding property has a polyimide surface layer comprising a polyimide which is thermoplastic and has a glass transition temperature of 190-450°C, wherein there are dispersed in the polyimide of the polyimide surface layer, in a proportion of approximately 0.5-10 mass% based on the polyimide of the polyimide surface layer, wholly aromatic polyimide particles made of a polyimide comprising at least 80% of a pyromellitic acid component and a p-phenylenediamine component, and having a median size of 0.3-0.8 μm and a maximum size of not greater than 2 μm, in at least about 1 μm of the polyimide surface layer. The polyimide film with enhanced sliding property has an inorganic powder-free polyimide surface layer wherein wholly aromatic polyimide particles are dispersed in about 1 μm of the polyimide surface layer comprising the thermoplastic polyimide, and having a static friction coefficient of 0.05-0.7 and a dynamic friction coefficient of 0.05-0.7.
COPYRIGHT: (C)2010,JPO&INPIT
NISHINO TOSHIYUKI
ABU TOSHIHIKO
YAMAGUCHI HIROAKI
| JPH06192446A | 1994-07-12 | |||
| JPH09302089A | 1997-11-25 | |||
| JPH06100714A | 1994-04-12 | |||
| JP2002096437A | 2002-04-02 | |||
| JP2003071982A | 2003-03-12 |
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