Ethylene oxide sterilizable, low cost nonwoven laminates with high wet peel stregth and improved barrier properties

(canceled)

A composite laminate comprising:

• a cast film layer, wherein said cast film layer comprises at least two layers, wherein at least one layer of said cast film is an outer layer, said outer layer comprising a polypropylene resin selected from the group consisting of polypropylene homopolymers, polypropylene copolymers, and blends of polypropylene and other polymers, and wherein at least one layer of said cast film is a barrier layer sufficient to prevent blood, viruses, and bacteria from passing through the cast film layer;
• and
• a nonwoven substrate layer laminated to said outer layer, wherein said nonwoven substrate layer comprises a fabric having a basis weight in the range of 10 to 100 gsm and wherein said fabric is selected from the group consisting of polypropylene, polyethylene, polyester and bicomponent polyethylene/polyester fibers.

A composite laminate comprising:

• a cast film layer, wherein said cast film layer comprises at least two layers, wherein at least one layer of said cast film is an outer layer comprising a blend of polypropylene and polyethylene and wherein at least one layer of said cast film is a barrier layer sufficient to prevent blood, viruses, and bacteria from passing through the cast film layer;
• and
• a nonwoven substrate layer laminated to said outer layer comprising a polypropylene fabric having a basis weight in the range of 10 to 100 gsm.

A composite laminate comprising:

• a cast film layer, wherein said cast film layer comprises at least three layers having different constituent parts and wherein at least two layers of said cast film is an outer layer, said outer layer comprising a polypropylene resin selected from the group consisting of polypropylene homopolymers, polypropylene copolymers, and blends of polypropylene with other polymers;
• and
• at least two nonwoven substrate layers laminated to said outer layers.

A composite laminate comprising:

• a cast film layer, wherein said cast film layer comprises at least three layers, wherein at least two layers of said cast film are outer layers, said outer layers comprising a polypropylene resin selected from the group consisting of polypropylene homopolymers, polypropylene copolymers, and blends of polypropylene and other polymers, and wherein at least one layer of said cast film is a barrier layer sufficient to prevent blood, viruses, and bacteria from passing through the cast film layer;
• and
• at least two nonwoven substrate layers laminated to said outer layers, wherein said nonwoven substrate layer comprises a fabric having a basis weight in the range of 10 to 100 gsm and wherein said fabric is selected from the group consisting of polypropylene, polyethylene, polyester and bicomponent polyethylene/polyester fibers.

A composite laminate comprising:

• a cast film layer, wherein said cast film layer comprises at least three layers, wherein at least two layers of said cast film are outer layers comprising a blend of polypropylene and polyethylene and wherein at least one layer of said cast film is a barrier layer sufficient to prevent blood, viruses, and bacteria from passing through the cast film layer;
• and
• at least two nonwoven substrate layer laminated to said outer layers comprising a polypropylene fabric having a basis weight in the range of 10 to 100 gsm.

A composite laminate comprising:

• a cast film layer, wherein said cast film layer comprises at least two layers having different constituent parts and wherein at least one layer of said cast film is an outer layer, said outer layer comprising a polypropylene resin selected from the group consisting of polypropylene homopolymers, polypropylene copolymers, and blends of polypropylene with other polymers;
• and
• a nonwoven substrate layer laminated to said outer layer using an adhesive having a dry basis weight in the range of 1 to 10 gsm.