| 摘要 |
A COMPOSITE SHEET HAS A HIGH TOTAL LIGHT TRANSMITTANCE OVER ITS ENTIRE REGION, THE COMPOSITE SHEET INCLUDING A NONWOVEN FABRIC (2) FORMED FROM THERMOPLASTIC SYNTHETIC RESIN FIBERS (2A) AND A NON-POROUS AND MOISTURE PERMEABLE PLASTIC FILM (3) FORMED FROM AN ESTER-BASED THERMOPLASTIC ELASTOMER RESIN AND JOINED BY FUSION TO ONE SURFACE OF THE NONWOVEN FABRIC (2). THE COMPOSITE SHEET (1) THUS CONSTITUTED HAS A TOTAL LIGHT TRANSMITTANCE OF NOT LESS THAN 60% AND NOT GREATER THAN 95%. (FIG. 1) |
