Biaxially oriented polyproplyene film

Details Biaxially oriented polyproplyene film Biaxially oriented polyproplyene film

2011-01-18

2011-01-18

Kruer, Kevin R. (Department: 1787)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C428S523000, C428S910000

Reexamination Certificate

active

07872085

ABSTRACT:
The present invention relates to a biaxially oriented polypropylene film containing: a polypropylene resin as a main component thereof, having a weight average molecular weight of 100,000 or more and 500,000 or less, the weight average molecular weight being determined by gel permeation chromatography, wherein at least one surface of the biaxially oriented polypropylene film has a protrusion volume of 2.0×104μm3or more and 3.0×104μm3or less, the protrusion volume being determined in an area of 560 μm×745 μm using a super-depth surface profile measurement microscope by determining an average plane of the surface based on distances between plural points on the surface and an irradiation source of the super-depth surface profile measurement microscope and measuring a volume of protrusions projecting from the average plane.

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