| 摘要 |
<p>Breathing composite sheet can be produced from a thermoplastic resin (2) and a porous substrate (3), such as a nonwoven fabric sheet, by extrusion-laminating technique using a specified cooling roll (5), the surface of which has been at least partly modified with a covering material (7) having specified ranges of thermal conductivity and hardness properties. The extruded molten thermoplastic film (2) carried on the porous substrate (3) is effectively perforated at the modified surface of the cooling roll (5) so as to give a breathing composite sheet.</p> |
