MANUFACTURE OF ALIPHATIC POLYESTER RESIN FOAM

摘要

PROBLEM TO BE SOLVED: To provide a quality aliphatic polyester resin foam having a small difference of temperature between a foam temperature and a modification reaction extrusion temperature, an excellent efficiency of production, and no extreme decrease of physical properties without using a branching material composed by precise control. SOLUTION: The manufacture of the aliphatic polyester resin foamed body is of a foamed body in which 100 pts.wt. aliphatic polyester resin having a melt viscosity of 1×10<2> -1×10<4> Pa.s measured under conditions at a temperature of 190 deg.C and rate of shear 100 sec<-1> and a melt tension of less than 2 mgf/Pa.s per unit viscosity and an organic peroxide of a quality satisfying 1 and B indicates an additive quantity of an organic peroxide (pts.wt.) respectively are placed into an extruder thereby to be extrusion foamed by a foaming agent for producing a gel fraction of a substantially 0%.