Patent ID: 8721827
Filing Date: 2014-05-13
Classification: A61F,B32B,C08F,C08J,C08L,C09D,Y10T

Abstract:
1. A method for forming an elastic, breathable film/nonwoven layer laminate comprising: filling a higher crystalline, predominantly linear polymer with a filler to form a filled polymer such that the filled polymer contains at least 60 percent by weight filler; dry-blending a thermoplastic elastomer with the filled polymer to form a blended elastomeric composition, such that the blended elastomeric composition includes between about 25 and 70 percent filler by weight, between about 5 and 30 percent higher crystalline polymer by weight, and between about 15 and 60 percent by weight elastomer; extruding the blended elastomeric composition into a film; and, bonding the film to a nonwoven layer to produce a film/nonwoven layer laminate wherein the elastomer comprises at least one linear ethylene/α-olefin block interpolymer, wherein the ethylene/α-olefin block interpolymer comprises hard blocks comprising less than 2 wt% comonomer, and soft blocks; and a styrenic block copolymer, or a combination thereof wherein the ethylene/α-olefin interpolymer has a density of from about 0.85 to about 0.885 g/cc.