Polypropylene resin composition for oriented film and oriented film of the composition
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United States of America Patent
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Jun 17, 1997
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N/A
app pub date -
Dec 14, 1995
filing date -
Dec 21, 1994
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Abstract
A polypropylene resin composition for oriented film excellent in transparency, slip property and blocking resistance which comprises the following components (a) and (b), and an oriented film obtained by orienting the composition at least in uniaxial direction: (a) 100 parts by weight of a crystalline polypropylene resin, and (b) 0.05 or more but less than 1 part by weight of crosslinked polymer beads which have a weight average particle diameter of 0.5-5 .mu.m, comprise 60-96% by weight of styrenic monomer units, 2-38% by weight of radical-polymerizable monomer units, the refractive index of the polymer of the radical-polymerizable monomer being 1.50 or less, and 2-50% by weight of crosslinkable monomer units, and give an average protuberance height of 60-600 nm on the surface of oriented film obtained by kneading the crosslinked polymer beads into the polypropylene resin followed by working up into oriented film.
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