Polymer pellets are formed using laminar gas flow within a downstream gas conduit, as may be implemented consistent with one or more embodiments herein. A gas channel directs gas to an outlet of a polymer extrusion mandrel via which a polymer melt is extruded. A downstream gas conduit extends away from the outlet of the polymer extrusion mandrel, and provides laminar gas flow along the polymer melt extending from the extrusion mandrel, and within the downstream gas conduit. Using this approach, laminar flow can be maintained along an initial portion of the polymer melt, and used to control the subsequent formation of pellets therefrom.

The disclosure provides eco-friendly synthetic wood containing coffee grounds, which uses, as main components, coffee grounds and waste gypsum, which are waste resources, and PETG recycled from waste plastic, thereby contributing to protection of the environment, and which enhances formability, post-processability, and a weather resistance of the synthetic wood by reducing a ratio of shrinking-swelling and a water absorption factor of the synthetic wood, and a manufacturing method thereof.

Methods of transforming an ultra-high molecular weight polymer into a processable material and compositions resulting from those methods. The methods may include a combination of applying a shear force to a polymer and heating the polymer. Also described are methods for using the compositions.

Methods of transforming an ultra-high molecular weight polymer into a processable material and compositions resulting from those methods. The methods may include a combination of applying a shear force to a polymer and heating the polymer. Also described are methods for using the compositions.

A method of devulcanizing crosslinked rubber uses a planetary roller extruder with a central spindle, planetary spindles, a housing, and a feed part. The method includes feeding vulcanized rubber through the feed part into the housing, rotating the central spindle about its rotational axis and thereby causing the planetary spindles to rotate about their rotational axes and revolve about the central spindle. This generates mechanical and thermal stress on the vulcanized rubber by kneading and/or crushing of the vulcanized rubber, breaking or destroying the molecular chains or bonds of the vulcanized rubber. The method further includes at least one of (A) adding particles of the vulcanized rubber eccentrically to the center of the planetary roller extruder module between the planetary spindles and (B) mechanically pressing particles of the vulcanized rubber between the planetary spindles with a crammer feeder.

A screw machine includes an inductive heating device for processing of material to be processed. The inductive heating device is used to heat the material in a heating zone. In the heating zone, at least one housing portion is made of an electromagnetically transparent material at least partly, the material being non-magnetic and electrically non-conductive, whereas at least one treatment element shaft is made of an electrically conductive material at least partly. The inductive heating device includes at least one coil formed integrally with a component of the at least one housing portion, in particular in such a way as to form a hybrid component. During the processing of the material, the inductive heating device generates an alternating magnetic field that produces eddy current losses in the at least one treatment element shaft, the eddy current losses leading to a temperature increase of the at least one treatment element shaft.

A planetary roller extruder with planetary spindles and stop ring. The abstract of the disclosure is submitted herewith as required by 37 C.F.R. 1.72(b). As stated in 37 C.F.R. 1.72(b): A brief abstract of the technical disclosure in the specification must commence on a separate sheet, preferably following the claims, under the heading Abstract of the Disclosure. The purpose of the abstract is to enable the Patent and Trademark Office and the public generally to determine quickly from a cursory inspection the nature and gist of the technical disclosure. The abstract shall not be used for interpreting the scope of the claims. Therefore, any statements made relating to the abstract are not intended to limit the claims in any manner and should not be interpreted as limiting the claims in any manner.

A process for the extrusion of plastics, such as plastics that tend to adhere or stick to parts of an extruder, using a planetary roller extruder in the feed part.

In one or more rubber mixtures for vehicle tires, production processes and systems are provided for control of water content in a rubber mixture as a function of controlling temperature and water flow rate.

Methods for improved colorant dispersion in polymer materials using solid-state shear pulverization, as compared to mixing techniques of the prior art, to address concerns relating to colorant agglomeration, plating-out and the like.