Hoechst Aktiengesellschaft

Bernd Espenschied

Peter Klein

Hans Wagner

Abrasion-resistant polyester mixture with enhanced consistency of processing, monofilaments therefrom, and production and use thereof. Described is an abrasion-resistant polyester mixture with enhanced consistency of processing, comprising a thermoplastic polyester and a thermoplastic polyurethane with or without customary nonpolymeric additives, the mixture of said polyester and said polyurethane having a melting point between 200.degree. and 230.degree. C. as are monofilaments made of said mixture. Also described are the production of this abrasion-resistant polyester mixture, the production of monofilaments therefrom, and their use for producing paper machine wire cloths.

Abrasion-resistant polyester mixture with enhanced consistency of

The invention relates to rapidly crystallizing polyester materials and a process for their preparation, in which, in a first stage, the polyester is prepared in the presence of an (alkaline earth) alkali metal or of an (alkaline earth) alkali metal compound, and then, in a second stage, further non-nucleated polyesters and a crystallization accelerator in a adequate amount are, if required, added to this polyester. The polyesters according to the invention are distinguished in particular by reduced molecular weight degradation.

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Augsburg, Germany

Bernd Espenschied