초록 ▼

The present invention relates to a breathable laminate including an oriented microporous elastomeric film and at least one support layer bonded to the film. The present invention also relates to a process for forming the breathable laminate including the step of stretching a filled film to produce a

The present invention relates to a breathable laminate including an oriented microporous elastomeric film and at least one support layer bonded to the film. The present invention also relates to a process for forming the breathable laminate including the step of stretching a filled film to produce a microporous film before bonding it to a support.

대표청구항 ▼

[ We claim:] [1.] A breathable laminate comprising:an oriented microporous relaxed unbiased film layer (10C) comprising an elastomeric polymer resin and at least 30% by weight of a filler having a particle size that contributes to pore formation and coated with a stearic acid,the relaxed unbiased fi

[ We claim:] [1.] A breathable laminate comprising:an oriented microporous relaxed unbiased film layer (10C) comprising an elastomeric polymer resin and at least 30% by weight of a filler having a particle size that contributes to pore formation and coated with a stearic acid,the relaxed unbiased film layer formed from an unstretched filled film (10A) having an original length and a stretched length (10B), said relaxed unbiased film layer including a permanent elongation of at least about 1.5 times the original length,and said relaxed unbiased film layer (10C) capable of having a room-temperature biased length that is at least about one and a half times said relaxed unbiased film layer length and a release length, upon release of a biasing force of no more than one and one quarter of the relaxed unbiased film layer length, having a water vapor transmission rate of at least about 1,000 g/m.sup.2 -24 hrs; andwherein said elastomeric polymer includes at least one of a) ethylene-propylene elastomer blends, b) ethylene copolymers, c) block copolymers including styrene, d) terpolymers of ethylene and propylene, e) molecular blends of at least two polymers of propylenes or polymers of propylene with ethylene, f) ethylene vinyl acetate, g) ethylene-normal butyl acrylate, or h) ethylene methyl acrylate; andat least one support layer bonded to said film layer.