| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a light base material for an automobile ceiling having appropriate mold-machining performance, superior in dimension stability, maintaining appropriate rigidity, superior in thermal characteristics such as low specific heat and low heat conductivity, and exhibiting excellent sound absorbing performance in a specified frequency region, and to provide an automobile ceiling material using the same. <P>SOLUTION: A thermoplastic resin foam layer sheet is formed by laminating non-foaming layers 11 and 13 having basis weight (weight per unit area) in single surface of 60-90 g/m<SP POS="POST">2</SP>on both surface of a foaming layer 10 obtained by extrusion-foaming a modified PPE resin and having a foaming magnification of 16-25 times, a closed cell rate of 80% or more and baasis weight of 80-120 g/m<SP POS="POST">2</SP>. The base material for an automobile ceiling is formed by laminating a polyurethane layer 20 having density of 15-30 kg/m<SP POS="POST">3</SP>and thickness of 2-4 mm on an indoor side non-foaming layer 13 surface, and laminating a non-woven fabric surface material 22 having basis weight of 100-200 g/m<SP POS="POST">2</SP>on the indoor side non-foaming layer surface through a surface adhesive 18 having basis weight of 15-30 g/m<SP POS="POST">2</SP>. This base material for an automobile ceiling is light, but it has low heat accumulating performance and high heat insulating performance, and capable of giving required dimension stability and rigidity to the automobile ceiling material. <P>COPYRIGHT: (C)2012,JPO&INPIT |
