Patent ID: 6264872
Filing Date: 2001-07-24
Classification: B29C,B29K,B29L,Y10T

Abstract:
A method for forming an embossed textured barrier film comprising:providing a substrate film comprising thermoplastic polymer and having a hydrohead of at least 30 mbar;feeding said substrate film through a nip of a counter-rotating bonding roll assembly comprising a first patterned roll and a second roll rotating at different circumferential speeds such that a speed differential between said first patterned roll and said second roll imparts a textured structure into said substrate film and a pattern of said first patterned roll imparts an embossed pattern into said substrate film to thereby form an embossed, textured barrier film having a hydrohead of at least 30 mbar and improved hand and texture; andselecting a nip pressure, a thermoplastic polymer composition, a substrate film temperature and said speed differential between said first patterned roll and said second roll such that said improved hand and texture are achieved without forming apertures or overly weakened areas in said substrate film and without destroying the barrier properties of said substrate film.