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Study on rough‐surface biaxially oriented polypropylene film. VII. Roughening by blending low melting point polymers
Author(s) -
Fujiyama Mitsuyoshi,
Kawamura Yoshimasa,
Wakino Tetsuo,
Okamoto Tomomi
Publication year - 1988
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1988.070360507
Subject(s) - materials science , polypropylene , composite material , surface roughness , polymer , melting point , surface finish , polyethylene , polybutene , raw material , rough surface , chemistry , organic chemistry
The roughening of biaxially oriented polypropylene film using polypropylene (PP) blended with low melting point polymers such as polybutene‐1 and high‐density polyethylene as raw resin in a successively stretching tenter method has been studied for the same reasons as has the roughening of BOP utilizing β crystals. Rough‐surface BOPs with a low depth and a high density of roughness were obtained by using the blended PPs as raw resins. By combining this roughening method with the roughening method utilizing the β crystals, rough‐surface BOPs with a crater‐like large roughness and a fine roughness on the ground were obtained. These rough‐surface BOPs showed excellent impregnation properties of insulating oils.