Patent ID: 6010765
Filing Date: 2000-01-04
Classification: G11B,Y10S,Y10T

Abstract:
A film made of an aromatic polyamide having a number of protrusions H2 on one surface of said film and a number of protrusions H3 on an opposite surface of said film which satisfy the relationships of:H2.ltoreq.50 protrusions/100 cm.sup.22.ltoreq.H3.ltoreq.100 protrusions/100 cm.sup.2,said film further having a tensile Young's modulus E20 at 20.degree. C. in at least one direction and a tensile Young's modulus E100 at 100.degree. C. in the same direction which satisfy the relationships of:E20.ltoreq.800 kg/mm.sup.20.5.ltoreq.E100/E20.