The invention relates to injection molded parts, preferably injection molded parts in the form of automotive interior parts, having a low TVOC content and a low tetrahydrofuran content based on polybutylene terephthalate synthesized from butanediol and terephthalic acid, compounded in a compounder under vacuum and subsequently processed by injection molding, wherein TVOC stands for “Total Volatile Organic Compounds”.

A method of manufacturing bulked continuous carpet filament which, in various embodiments, comprises: (A) grinding recycled PET bottles into a group of flakes; (B) washing the flakes; (C) identifying and removing impurities, including impure flakes, from the group of flakes; (D) passing the group of flakes through an MRS extruder while maintaining the pressure within the MRS portion of the MRS extruder below about 1.5 millibars; (E) passing the resulting polymer melt through at least one filter having a micron rating of less than about 50 microns; and (F) forming the recycled polymer into bulked continuous carpet filament that consists essentially of recycled PET.

A method of manufacturing bulked continuous carpet filament which, in various embodiments, comprises: (A) grinding recycled PET bottles into a group of flakes; (B) washing the flakes; (C) identifying and removing impurities, including impure flakes, from the group of flakes; (D) passing the group of flakes through an MRS extruder while maintaining the pressure within the MRS portion of the MRS extruder below about 1.5 millibars; (E) passing the resulting polymer melt through at least one filter having a micron rating of less than about 50 microns; and (F) forming the recycled polymer into bulked continuous carpet filament that consists essentially of recycled PET.

In particular embodiments, a process for producing bulked continuous carpet filament from recycled polymer utilizes two vacuum pumps (140A, 140B) in combination with a single extruder (100). In various embodiments, the dual vacuum arrangement (e.g., at least two vacuum pumps (140A, 140B)) operably coupled to the single extruder (e.g., MRS extruder (100)) may be configured to remove one or more impurities from recycled polymer as the recycled polymer passes through the extruder.

In particular embodiments, a process for producing bulked continuous carpet filament from recycled polymer utilizes two vacuum pumps (140A, 140B) in combination with a single extruder (100). In various embodiments, the dual vacuum arrangement (e.g., at least two vacuum pumps (140A, 140B)) operably coupled to the single extruder (e.g., MRS extruder (100)) may be configured to remove one or more impurities from recycled polymer as the recycled polymer passes through the extruder.

The present disclosure relates to a facility for forming one of a graphene-polymer resin composite and a carbon material-polymer resin composite. According to the facility of the present disclosure, in a process of forming the composite, gas and water vapor contained in graphene, a carbon material, and a polymer resin are effectively removed resulting in an increase in coupling force between the polymer resin and one of the graphene and the carbon material, and the graphene and the carbon material is uniformly dispersed inside the polymer resin resulting in no degradation of physical properties of the composite, and also, the polymer resin may be prevented from carbonizing and solidifying because there is no stagnant section while molten liquid of the polymer resin and one of the graphene and the carbon material passes through each apparatus in the facility, and thus, physical properties of the composite are maintained constant.

The invention relates to a method for producing a compound or a film containing thermoplastic starch, an alpha-hydroxycarboxylic acid ROHCOOH, in which R is CH.sub.2 or CH.sub.3CH.sub.2, in an amount of from 0.1 to 5, preferably 0.1 to 3, particularly preferably 0.1 to 1 wt. % in relation to the thermoplastic starch, and a thermoplastic polymer, in which method the compound or the film is exposed during or after its extrusion to an additional heating step to 100-140° C. A thermoplastic starch usable for the production of the compound, a compound produced by the method, and a transparent film produced from such a compound are also described.

A screw includes a screw main body, a conveyance portion conveying a raw material, and a passage provided in the screw main body. The passage includes a first passage element, a second passage element, and a third passage element. The screw main body has a plurality of cylindrical bodies arranged in an axial direction of the rotating shaft. At least a portion of the conveyance portion is formed on outer peripheral surfaces of the cylindrical bodies adjacent to each other, and the passage is formed in the cylindrical body so as to cross over between the adjacent cylindrical bodies.

The present disclosure relates to a facility for forming one of a graphene-polymer resin composite and a carbon material-polymer resin composite. According to the facility of the present disclosure, in a process of forming the composite, gas and water vapor contained in graphene, a carbon material, and a polymer resin are effectively removed resulting in an increase in coupling force between the polymer resin and one of the graphene and the carbon material, and the graphene and the carbon material is uniformly dispersed inside the polymer resin resulting in no degradation of physical properties of the composite, and also, the polymer resin may be prevented from carbonizing and solidifying because there is no stagnant section while molten liquid of the polymer resin and one of the graphene and the carbon material passes through each apparatus in the facility, and thus, physical properties of the composite are maintained constant.

An extruder screw for a multi-screw extruder for plastics extrusion includes: a feeding and metering zone for melting and homogenizing the plastic and an evacuating zone for carrying away gaseous constituents and a compressing and/or discharging zone; a multi-screw section, which has a plurality of planetary screws, which lie open on the outer circumference of the extruder screw, at least over part of their length; and a driving zone, in which the planetary screws engage by way of a toothing in an external toothing on a central shaft or in an internal toothing in a stator ring or in the inner wall of an extruder bore of the multi-screw extruder. The feeding and metering zone extends into the multi-screw section, wherein the respective part of the planetary screws that is lying in the metering zone is at least partially enclosed.