Moisture vapor permeable carpet underlay

摘要

A carpet underlay that is liquid impermeable and moisture vapor permeable comprising a foamed cushion and a barrier film affixed to the side of the foamed cushion in contact with the carpet, the barrier film being impermeable to liquids and permeable to moisture vapor and comprising copolymer that comprises polytrimethylene ether soft segments and hard segments selected from the group consisting of polyester, polyamide, polyurethane and polyurethane-urea.