Patent ID: 6027593
Filing Date: 2000-02-22
Classification: B29C,B29K,B29L

Abstract:
A method using a thermal bonding means for continuously thermally bonding:A. a thermoplastic polymeric film to two or more thermoplastic polymeric nonwovens where said film and said nonwovens are made from dissimilar polymers; orB. a thermoplastic polymeric film to two or more thermoplastic polymeric films where said films are made from different polymers; orC. a thermoplastic polymeric nonwoven to two or more thermoplastic polymeric nonwovens where said nonwovens are made from different polymers, orD. an elastic film, thread or ribbon or other elastic member to a thermoplastic polymeric film and a thermoplastic nonwoven:wherein the bonding is induced by subjecting the three or more nonwovens, films or combinations of nonwovens, elastic member and films to a thermal bonding means capable of providing a nip pressure of at least 10 pounds per linear inch and a temperature of at least 20.degree. F. above the plastic point of the higher plastic point polymer, and wherein the heated member of the thermal bonding means is adjacent to said nonwoven or film with the higher plastic point and said nonwovens, films and elastic members with progressively lower plastic points are progressively further from said heating means with the lowest plastic point material adjacent to the unheated member.