Patent ID: 6600008
Filing Date: 2003-07-29
Classification: C08J,C23C,Y02T,Y10S,Y10T

Abstract:
A drawn film comprising, as its main component, an aliphatic polyester whose primary repeating unit is represented by a general formula â€”Oâ€”CHRâ€”COâ€” (where R denotes H or an alkyl group having a carbon number of 1-3), wherein:a three-dimensional surface roughness SRa of at least one side of the film is about 0.01 &mgr;m to about 0.1 &mgr;m; and PCC value denoting the number of projections on the film per a unit of area along a mean roughness plane and the three-dimensional surface roughness SRa satisfy the following relationship: PCC value &lE;7000-45000Ã—SRa, wherein the film further comprises a slip additive having an average particle size of about 1 &mgr;m to about 4 &mgr;m.