| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a composite sheet which contains a substrate and a foam layer provided to at least one surface of the substrate, that is a novel composite sheet that is capable of controlling the average hole diameter of spherical bubbles in the foam layer to be small in a precise manner, and has a wide range of control of the density of the foam layer and the thickness of the foam layer, achieves excellent mechanical strength, while taking into environment into consideration, at a low cost. <P>SOLUTION: The composite sheet contains the substrate and the foam layer provided to at least one surface of the substrate. The foam layer has spherical bubbles, the average hole diameter of the spherical bubbles is less than 30μm, and the density of the foam layer is 0.1-0.9 g/cm<SP POS="POST">3</SP>. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
