发明授权
US06521552B1 Water vapor-permeable, waterproof fabric 失效
水蒸气渗透,防水面料

Water vapor-permeable, waterproof fabric
摘要:
A water vapor-permeable waterproof fabric free from an environmental pollution problem upon being discarded is formed by coating a substrate fiber fabric with a composite coating layer including a lower layer (A) directly formed on the substrate fabric and an upper layer (B) formed on the lower layer (B), wherein the lower and upper layers are formed from one of polyetherester elastomers different from each other and each containing polyalkylene glycol (PAG) residues, and satisfy the following requirements: (a) in the polyetherester elastomer (PEEA), the polyalkylene glycol residues contain 90% by weight or more of polytetramethylene glycol residues; (b) in the polyetherester elastomer (PEEB), the polyalkylene glycol residues contain 50% by weight or more of polyethylene glycol residues; (c) the thickness of the composite coating layer is 5 to 50 &mgr;m; and (d) the lower layer (A) is in an amount of 5 to 40% by weight based on the total weight of the composite coating layer.
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