| 摘要 |
<p>A laminate sheet of at least three layers including a perforated sheet layer, and flexible sheet layers laminated on both sides of the perforated sheet layer wherein: (a) said perforated sheet layer has a thickness of 0.006 to 1.0 mm and an aperture rate of 10 to 90%, (b) an adhesive layer is applied on only one of said flexible sheet layers and the other flexible sheet layer is bonded by the adhesive layer extending throughout said apertures, and (c) said two flexible sheet layers are bonded together through said perforated sheet layer by means of said adhesive layer over an area of 5 to 95% of the overall area. The perforated sheet layer is formed of a metal foil, paper, unwoven fabrics, cellophane, cloth, and uniaxially molecule-stretched thermoplastic triacetate film or a thermoplastic resin film. The apertures in the perforated sheet layer have a diameter of 0.5 to 25 mm.</p> |
