초록 ▼

This invention relates to films which have a high degree of silence and pliability and comprise at least one layer formed from a polymeric blend which includes about 40% to 60% by weight of any ethylene and vinyl-acetate copolymer and about 60% to 40% by weight of an elastomeric polyolefin. The elas

This invention relates to films which have a high degree of silence and pliability and comprise at least one layer formed from a polymeric blend which includes about 40% to 60% by weight of any ethylene and vinyl-acetate copolymer and about 60% to 40% by weight of an elastomeric polyolefin. The elastomeric polyolefin preferably comprises a blend or “alloy”of an ethylene and vinyl-acetate copolymer and an elastomeric ethylene and propylene copolymer. Such films are particularly useful for manufacturing drainage containers or bags for medical applications.

대표청구항 ▼

A multilayer film from which ostomy pouches or the like having a high degree of silence and pliability may be constructed comprising: (a) a barrier layer selected from the group consisting of copolymers of vinylidene chloride and copolymers of ethylene-vinyl alcohol; (b) two outer layers with the ba

A multilayer film from which ostomy pouches or the like having a high degree of silence and pliability may be constructed comprising: (a) a barrier layer selected from the group consisting of copolymers of vinylidene chloride and copolymers of ethylene-vinyl alcohol; (b) two outer layers with the barrier layer disposed therebetween, each outer layer comprising a blend of: (i) 60% to 40% by weight of an elastomeric polyolefin alloy consisting essentially of: (1) 20% to 40% by weight of an elastomeric ethylene-propylene copolymer, said copolymer having an ethylene content of 55% to 70% by weight; (2) 70% to 35% by weight of a thermoplastic, film forming, ethylenevinyl acetate copolymer having a vinyl acetate content of less than than about 20%; and (3) 10% to 30% by weight of said alloy comprising machinability and fabricability promoting agents; and (ii) 40% to 60% of a thermoplastic, film forming ethylene-vinyl acetate copolymer having a vinyl-acetate content of less than about 20% by weight; and (c) said multilayer film being coextruded and hot blown.