Patent ID: 6872445

Claim:
A carpet pad consisting essentially of: a cushion having an upper and lower surface thereon, and, a barrier film formed of a synthetic polymeric material directly bonded to the upper surface of the cushion, the carpet pad being simultaneously impermeable to liquid deposited onto the pad from above the barrier film, and permeable to moisture vapor at a moisture vapor transmission rate of at least 14.6 grams per square meter per twenty-four hours (14.6 g/m 2 /24 hours), the pad being sufficiently durable to maintain liquid impermeability under a pressure of at least eight pounds per square inch (0.56 kg/m 2 ) as measured by a Modified Mullen Bursting Strength Test, whereby the carpet pad does not absorb liquid deposited onto the pad from above the upper surface of the barrier film and allows moisture from below the lower surface of the cushion to pass through the pad.