초록 ▼

A moisture vapor permeable, substantially liquid impermeable composite sheet material includes a powder-bonded nonwoven web adhered to a moisture vapor permeable thermoplastic film. The nonwoven web includes a first layer comprised primarily of fibers that are compatible with an adhesive used to bon

A moisture vapor permeable, substantially liquid impermeable composite sheet material includes a powder-bonded nonwoven web adhered to a moisture vapor permeable thermoplastic film. The nonwoven web includes a first layer comprised primarily of fibers that are compatible with an adhesive used to bond the web, and a second layer comprised of a blend of fibers, some of which are compatible with, and some of which are incompatible with the bonding adhesive and the thermoplastic film. A method for making the composite sheet material and an item of apparel made from the sheet material are also provided.

대표청구항 ▼

1. A moisture vapor permeable, substantially liquid impermeable composite sheet material comprising:a first fibrous nonwoven web having a first side and an opposite second side, a second fibrous nonwoven web having a first side and an opposite second side, the first side of said second fibrous nonwo

1. A moisture vapor permeable, substantially liquid impermeable composite sheet material comprising:a first fibrous nonwoven web having a first side and an opposite second side, a second fibrous nonwoven web having a first side and an opposite second side, the first side of said second fibrous nonwoven web abutting the second side of said first fibrous nonwoven web, said first and second fibrous nonwoven webs each being powder-bonded webs wherein the fibers of said first and second fibrous webs are bonded to the other fibers of such respective webs by a synthetic adhesive permeating said first and second nonwoven fibrous webs, and wherein the first and second fibrous nonwoven webs are bonded to each other by said adhesive, a moisture vapor permeable thermoplastic film bonded to the second side of said second fibrous nonwoven web; wherein at least 90 weight percent of the fibers in said first fibrous nonwoven web are compatible with said adhesive, between 25 and 75 weight percent of the fibers in said second fibrous nonwoven web are compatible with said adhesive and said thermoplastic film, between 75 and 25 weight percent of the fibers in said second fibrous nonwoven web are incompatible with said adhesive and said thermoplastic film, and at least 50 weight percent of the polymer in said thermoplastic film is compatible with said adhesive.