Abstract: Systems, methods, and devices for additive manufacturing are provided. In some embodiments, a method includes: coupling a plurality of build platforms to a carrier; forming a plurality of 3D objects on the plurality of build platforms using an additive manufacturing process, where each build platform receives at least one 3D object thereon; removing the plurality of build platforms from the carrier; performing post-processing of the plurality of 3D objects while the 3D objects remain on the respective build platforms; and separating the plurality of 3D objects from the respective build platforms.

Abstract: The invention relates to a polymer composition comprising a biologically degradable polymer and a material from sea plants and/or shells of sea animals or at least two components selected from the group consisting of saccharides and the derivatives thereof, proteins, amino acids, vitamins and metal ions. The invention additionally relates to a molded article comprising said polymer composition. Said molded article may be used packaging material or fibrous material, in the form of fibrous material as mixing component for the production of yarns, and in the form of fibrous material for the production of nonwoven fabrics or woven fabrics.

Abstract: The preparation of polyesters and copolyesters, titanium dioxide precipitates and/or titanium dioxide/silicon dioxide coprecipitates having a composition of TiO.sub.2 :SiO.sub.2 >90:10 mol/mol and/or titanium dioxide/zirconium dioxide coprecipitates having a composition of TiO.sub.2 :ZrO.sub.2 >95:5 mol/mol, which have been obtained by hydrolytic precipitation of the corresponding metal alcoholates formed from mono- or polyhydric alcohols, are proposed as polycondensation catalysts. They offer increased safety for the ecosystem and have a higher catalytic activity than Sb.sub.2 O.sub.3, so that the preferred amount used is only 10 to 100 ppm, based on the esters or oligoesters to be subjected to polycondensation. Their storage stability is good if the catalysts have a water content of from 0 to about 15 weight percent, preferably from 0 to about 5 weight percent based upon the hydrated precipitate or coprecipitate, as determined by Karl Fischer titration.

Abstract: For the preparation of polyesters and copolyesters, titanium dioxide/silicon dioxide coprecipitates having a composition of TiO.sub.2 :SiO.sub.2 =90:10 to 20:80 mol/mol and/or titanium dioxide/zirconium dioxide coprecipitates having a composition of TiO.sub.2 : ZrO.sub.2 =95:5 to 70:30 mol/mol are proposed as polycondensation catalysts. They have a higher catalytic activity than Sb.sub.2 O.sub.3, so that the preferred amount used is only 10 to 100 ppm, based on the esters or oligoesters to be subjected to polycondensation.