POLYIMIDE FILM AND PROCESS FOR PRODUCING THE SAME

A polyimide film that in the stacking of multilayered substrates by means of a hot press, reduces any inter-film adhesion at hinge portion, excelling in easily sliding property enabling resolution of the "squeak" trouble caused by mutual friction of films. There is provided a polyimide fil...

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Bibliographische Detailangaben
Hauptverfasser:	SAWASAKI KOICHI, TESHIBA TOSHIHIRO
Format:	Patent
Sprache:	eng
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS GENERAL PROCESSES OF COMPOUNDING MAKING GRANULES OR PREFORMS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PREPARATION OR PRETREATMENT OF THE MATERIAL TO BESHAPED PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIALCONTAINING PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	A polyimide film that in the stacking of multilayered substrates by means of a hot press, reduces any inter-film adhesion at hinge portion, excelling in easily sliding property enabling resolution of the "squeak" trouble caused by mutual friction of films. There is provided a polyimide film having a streaked unevenness on the surface thereof and exhibiting a coefficient of static friction between film surfaces of 0.1 to 0.7, preferably having a film surface roughness (Rz) of 0.7 to 10 mum. Further, there is provided a process for producing a polyimide film, comprising subjecting a surface of polyimide film to abrasion treatment by means of a grinding roll or grinding tape to thereby form a streaked unevenness on the surface thereof.