Patent ID: 6927184
Filing Date: 2005-08-09
Classification: B01D,D01F,D04H,Y10T

Abstract:
1. A process for producing microfiber webs consisting essentially of a cycloolefin polymer by melt-blowing, wherein the cycloolefin polymer contains: (a) 0.1–100% by weight, based on the total mass of the cycloolefin polymer, of polymerized units derived from at least one polycyclic olefin of the formulae I, II, II′, III, IV, V or VI  where R subject to the proviso that the same R (b) 0 to 99.9% by weight, based on the total mass of the cycloolefin polymer, of polymerized units derived from one or more acyclic olefins of the formula VII  where R (c) 0 to 45% by weight, based on the overall composition of the cycloolefin polymer, of polymerized units derived from one or more monocyclic olefins of the formula VIII  where m is from 2 to 10.