Patent ID: 6210516
Filing Date: 2001-04-03
Classification: D06M

Abstract:
A process for selectively chemically modifying a shaped polymeric material having a first surface and a second surface separated by a thickness, the process comprising:contacting the shaped polymeric material with a first unsaturated modifying compound having a first substituent capable of altering the surface characteristics of the shaped polymeric material;exposing the shaped polymeric material under ambient pressure conditions to from about 5 KeV to about 85 KeV of ionizing radiation from an ionizing electron beam radiation source operating at an energy potential of from about 75 KeV to about 125 KeV to selectively chemically bond the first modifying compound to the first surface of the shaped polymeric material, wherein the first surface is facing the ionizing electron beam radiation source;washing the shaped polymeric material to remove first modifying compound which was not chemically bonded;contacting the shaped polymeric material with a second unsaturated modifying compound having a second substituent capable of altering the surface characteristics of the shaped polymeric material; andexposing the shaped polymeric material under ambient pressure conditions to from about 5 KeV to about 85 KeV of ionizing radiation from an ionizing electron beam radiation source operating at an energy potential of from about 75 KeV to about 125 KeV to selectively chemically bond the second modifying compound to the second surface of the shaped polymeric material, wherein the second surface is facing the ionizing electron beam radiation source.