| 摘要 |
<p>This invention provides a waterproof and breathable elastomeric polytetrafluoroethylene layered article for use in, for example, material for footwear articles. The waterproof and breathable polytetrafluoroethylene layered article can, for example, exhibit elastomeric properties of stretch to break of 275% in the machine direction, and 145% in the tranverse direction and a total stretch recovery of at least 39% after being stretched 75% extension for 100 cycles. This invention further provides a waterproof and breathable elastomeric polytetrafluoroethylene layered article bonded to a stretch fabric for footwear articles. The waterproof breathable elastomeric polytetrafluoroethylene layered article bonded to a stretch fabric is thus durable and possesses a moisture vapor transmission rate exceeding 1000 gms/m<2>/day, and preferably above about 2000 gms/m<2>/day.</p> |
