Patent ID: 8425829

Claim:
A process for producing a molding comprising: introducing a melt of a thermoplastic molding composition into a mold; introducing nitrogen or compressed air; passing water into the mold; compressing the nitrogen or compressed air and pressing the melt onto the external walls of the mold; reducing pressure until the mold can be opened; wherein the thermoplastic molding composition comprises: A) from 10 to 89% by weight of a polyethylene terephthalate which can comprise up to 65% by weight, based on 100% by weight of A), of another polyester, B) from 0.01 to 10% by weight of B1) at least one hyperbranched polycarbonate with an OH number of from 1 to 600 mg KOH/g of polycarbonate (to DIN 53240, part 2), or B2) at least one A x B y hyperbranched polyester, where x is at least 1.1 and y is at least 2.1, or a mixture of these, C) from 10 to 60% by weight of a fibrous or particulate filler, and D) from 0 to 20% by weight of further additives, where the total of the percentages by weight of components A) to D) is 100%, and wherein the degree of branching for component B is from 10 to 99.9%.