The invention relates to a method in which a polyester melt containing one or more polyesters is produced, the polyester melt being foamed by a blowing agent and a foamed granulate is produced from the foamed polyester melt. The intrinsic viscosity (IV) of the polyester melt is reduced by the blowing agent about at least 0.05 dl/g, measured according to ASTM D4603, and the IV of the foamed granulate is then increased by means of a solid phase polycondensation (SSP).

In one aspect, the invention provides a substantially exfoliated nanocomposite material including starch and hydrophobically modified layered silicate clay. In another aspect, the invention provides packaging made from material including the substantially exfoliated nanocomposite material described above. The nanocomposite material has improved mechanical and rheological properties and reduced sensitivity to moisture in that the rates of moisture update and/or loss are reduced. In another aspect, the invention provides a process for preparing the substantially exfoliated nanocomposite material described above, including a step of mixing the starch in the form of an aqueous gel with the hydrophobic clay in a melt mixing device. In a further aspect, the invention provides a process for preparing the substantially exfoliated nanocomposite material, including the steps of mixing the starch with the hydrophobic clay to form a masterbatch (hereinafter “the masterbatch process”) and mixing the masterbatch with further starch.

Method for obtaining biodegradable polyesteretheramide that has a stage of esterification and/or transesterification and amidation reaction, a stage of prepolycondensation, a stage of polycondensation, an optional stage of extraction, a stage of drying and a final stage of extrusion with additives. The method of obtaining PEEA enables better satisfaction of the needs of each client as regards viscosity, composition and additives. It enables reducing the amount of interface product that has lower commercial value and improves the colour of the product, while at the same time provides a more efficient process, ecologically cleaner and safer for all the operatives.

The present invention refers to a process for obtaining thermoplastic composite pellets reinforced with cellulose pulp or additive cellulose pulp, cellulose fibers, and/or hydrophilic material from renewable source, and/or natural source material comprising the steps of cellulose pulp dry processing carried out in a binder mill, and/or plastic agglomerator and/or densifier, and preparation of the masterbach comprising the steps of drying the pulp and the thermoplastic materials, preparing the compositions of polymer and cellulose fiber, milling the masterbatch produced, drying the product, extruding the polymer and the masterbatch, and injecting the obtained material.

A method and a device for reprocessing waste products containing substantially polyalkylene terephthalate, particularly polyethylene terephthalate and/or polybutylene terephthalate, in a continuous process by means of depolymerizing is provided. A solid alkali hydroxide and/or alkali earth hydroxide, particularly sodium hydroxide, is added to the waste products for producing a reaction mixture, suitable for recycling multilayer systems and colored material nearly entirely chemically into the starting materials at a high throughput and high quality, in order to be able to produce new polyalkylene terephthalate products from the recycling products without limitation. An alkylene glycol is additionally added to the reaction mixture as a reactant, wherein the alkylene glycol is an alkylene glycol produced as a product of the intended depolymerizing, particularly MEG. No further reactive components are added to the reaction mixture.

Embodiments relate to a heat shrinkable film and a process for regenerating a polyester container using the same. The heat shrinkable film comprises a copolymerized polyester resin comprising a diol component and a dicarboxylic acid component and has a heat shrinkage rate of 30% or more in the main shrinkage direction upon thermal treatment at a temperature of 80° C. for 10 seconds and a melting point of 190° C. or higher as measured by differential scanning calorimetry. It not only solves the environmental problems by improving the recyclability of the polyester container, but also is capable of enhancing the yield and productivity.

Embodiments relate to a process for regenerating a polyester container and regenerated polyester chips prepared therefrom. The process comprises preparing a polyester container provided with a heat shrinkable film; crushing the container provided with the heat shrinkable film to obtain flakes; and thermally treating the flakes to produce regenerated polyester chips, wherein when the flakes are thermally treated at a temperature of 200° C. to 220° C. for 60 minutes to 120 minutes, the clumping fraction is 5% or less, and the flakes comprise first flakes obtained by crushing the container and second flakes obtained by crushing the heat shrinkable film. It not only solves the environmental problems by improving the recyclability of the polyester container, but also is capable of enhancing the yield and productivity.

The present invention provides a resin composition having a high level of processability, which is a resin composition including a saponified ethylene-vinyl ester-based copolymer (A), a layered inorganic compound (B), and a carbonic acid salt (C) (provided that the carbonic acid salt (C) excludes the layered inorganic compound (B)).

For the production of polymers in which there are fillers with particle sizes below 10 μm incorporated and homogeneously distributed, a polymer starting material is input into a twin-screw extruder and is melted there to give a melt. In a conveying and mixing section, a suspension, which is formed of the fillers and of a carrier liquid, is injected into the melt. The melt viscosity is reduced by injection of the carrier liquid in the conveying and mixing section in that a cleavable polycondensate is used as polymer and low-molecular-weight cleavage product arising during the polycondensation is used as carrier liquid, and therefore the molten polymer is at least to some extent depolymerized within the conveying and mixing section. That the mixture, which is formed of the melt whose viscosity is reduced by cleavage, of the remainder of the carrier liquid and of the fillers, is homogenized.

A polyamide resin composition for an extrusion-molded article exposed to high-pressure hydrogen gas contains: 70 to 99 parts by weight of a polyamide 6 resin (A); 1 to 30 parts by weight of an impact modifier (B); and 0.005 to 1 parts by weight of a metal halide (C) with respect to a total of 100 parts by weight of the polyamide 6 resin (A) and the impact modifier (B). The polyamide resin composition has a melt tension of 20 mN or more when measured at 260° C. and a take-up speed at strand break of 30 m/min or more when measured at 260° C.