abstract |
It has a foamed layer containing a thermoplastic polyester resin, and the thermoplastic polyester resin has a number average molecular weight Mn of 9,000 to 26,000 and a Z average molecular weight Mz of 240,000 to 710,000. A thermoplastic polyester resin foam sheet having an acetaldehyde content of 25% by mass or less in the foam layer. |