초록 ▼

Embossed textured films are made by feeding a thin thermoplastic polymer barrier film through the nip of a bonding roll assembly having a patterned roll and an anvil roll rotating at different circumferential speeds which differ by 5% to 200%. The bond pattern is imparted to the film as well as addi

Embossed textured films are made by feeding a thin thermoplastic polymer barrier film through the nip of a bonding roll assembly having a patterned roll and an anvil roll rotating at different circumferential speeds which differ by 5% to 200%. The bond pattern is imparted to the film as well as additional texture due to the differential speeds of the rollers thereby creating an embossed, textured barrier film having improved hand and a hydrohead in excess of about 30 mbar.

대표청구항 ▼

[ We claim:] [1.]1. 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 patter

[ We claim:] [1.]1. 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.