Abstract: Process for production of multicomponent moldings, which comprises producing a molding of which at least one layer is composed of a thermoplastic molding composition composed of A) from 10 to 99.99% by weight of at least one thermoplastic polyester, B) from 0.01 to 50% by weight of B1) at least one highly branched or hyperbranched polycarbonate having an OH number of from 1 to 600 mg KOH/g of polycarbonate (to DIN 53240, Part 2), or B2) at least one highly branched or hyperbranched polyester of AxBy type, where x is at least 1.1 and y is at least 2.1, or a mixture of these, and C) from 0 to 60% by weight of other additives, where the total of the percentages by weight of components A) to C) is 100%.

Abstract: A process for the production of foamed plastic bodies, including the steps: introducing a physical foaming agent into the plasticised plastic material which is in the plasticising unit and which is to be foamed, wherein the physical foaming agent is introduced into the plasticised plastic material at a pressure of more than 180 bars, preferably more than 300 bars, particularly preferably more than 350 bars, injecting the plastic material provided with physical foaming agent into the tool cavity of the injection moulding machine, and decompression of the molten plastic material by expansion of the tool cavity.