Patent ID: 6841106

Claim:
A method for producing a foamed article by first making modified polyester resin pellets having increased swell of 5 to 200% and JIS melt flow rate (MFR) of not more than 50 g/10 minutes measured at 280° C. by preliminary heating a mixture comprising (a) 100 parts by weight of a recycled product of a recovered polyethylene terephthalate-based aromatic polyester molded product, (b) 0.1 to 10 parts by weight of a mixture as a coupling agent of 0 to 75% by weight of a compound having two epoxy groups in the molecule, and 100 to 25% by weight of a compound having more than two epoxy groups, and (c) 0.01 to 5 parts by weight of a metal salt of a carboxylic acid as a coupling reaction catalyst to a temperature greater than the melting point of said polyester, and secondly heat foaming said modified polyester resin using a foaming agent; wherein the use of 100 to 25% by weight of a compound having more than two epoxy groups increases swell.