The invention relates to an extruder (30) comprising a housing (31), a first material inlet (32) for a mixture (46) at least consisting of a solvent and a dissolved medium, a material outlet (33), a screw (35), a screw drive (34), and at least one distillation region (36a-d) between the inlet (32) and the outlet (33), which allows an outflow of solvent, and a discharge line (43-45) for the solvent.

A method for manufacturing bulked continuous carpet filament, the method comprising: (1) reducing a chamber pressure within a chamber to below about 5 millibars; (2) after reducing the chamber pressure to below about 5 millibars, providing a polymer melt to the chamber; (3) separating the polymer melt into at least eight streams; (4) while the at least eight streams of the polymer melt are within the chamber, exposing the at least eight streams of the polymer melt to the chamber pressure of below about 5 millibars; (5) after exposing the at least eight streams of the polymer melt to the chamber pressure of below about 5 millibars, recombining the at least eight streams into a single polymer stream; and (6) forming polymer from the single polymer stream into bulked continuous carpet filament.

In a cost-effective and qualitatively better method for producing spacers for a winding unit of an electrical high-voltage device, at least two starting components are mixed together in a mixing chamber under vacuum to form a component mixture. The component mixture is transferred to an extrusion housing, likewise under vacuum, of an extruder in which a transport device is arranged and which is equipped with a mouthpiece delimiting an outlet opening. The extrudate exiting from the mouthpiece is cured by the addition of heat in a vacuum in order to obtain the spacers.

The invention relates to a screw extruder (29) having a housing (30) comprising an intake housing (4), a degassing housing (5), and at least one housing bore (21, 22) running in the interior of the degassing housing (5) and implementing at least one internal wall segment (25; 26; 27; 28) of the degassing housing (5) and serving for receiving at least one auger shaft (7), and wherein the at least one wall segment (25; 26; 27; 28) of the at least one housing bore (21, 22) comprises at least one partition wall (13, 33) protruding into the at least one housing bore (21, 22) in the region of the degassing housing (5), and wherein at least one filter element (8) is disposed in the interior of the degassing housing (5) and at least partially encompasses the at least one auger shaft (7) and bears on the partition wall (13) in regions for implementing at least two spatial pressure regions (11, 12) sealed off from each other.

An extruder which can be applied to various types of resin and elastomer without having to replace a die is provided. An extruder of the present inventions has: a barrel to which raw material, that is raw elastomer or raw material resin, is supplied; a screw that is driven to rotate in the barrel in order to process the raw material together with the barrel; and die 5 that is provided at a discharge point of the barrel and that discharges the raw material that has been processed. Die 5 includes first flat plate 11 having at least one first hole 13 and second flat plate 12 having at least one second hole 14, wherein first flat plate 11 and second flat plate 12 are arranged adjacent to each other along longitudinal axis X1 of the barrel, and at least either first flat plate 11 or second flat plate 12 is movable relative to the other flat plate such that an overlapping part of first hole 13 and second hole 14 can be varied.

Described herein is a liquid injector for a barrel extruder as well as methods and processes of manufacturing irradiation crosslinked polypropylene foam. In some embodiments, this includes a liquid injection barrel element that is incorporated in an extruder barrel that includes at least one injection port, a temperature sensor well, and cooling channels.

The present invention provides a process for preparing an improved compounded product and a compounded product prepared by that process.

An apparatus for filtering and degassing a plastic melt, in particular of a thermoplastic plastic melt, comprising a feeding extruder (11) which comprises at least one extrusion worm (13) which is rotatable in a housing, wherein the feeding extruder opens into the feeding region of one or several parallel melt filter modules (31) and a discharge extruder (21) with at least one extrusion worm (23) is situated in the discharge region of the melt filter(s), said discharge extruder being operated in the opposite direction of the feeding extruder in such a way that the worm tip (24) acts as the intake zone and the region near the drive acts as the discharge zone, wherein, for discharging the melt, a discharge aperture (27) in the housing is provided before the drive (22) of the discharge extruder, wherein the shaft of the extrusion worm of the discharge extruder is sealed against the drive of the discharge extruder with a sealing element (26) and wherein the feeding extruder opens into melt valves (25) and/or melt deflectors which are upstream of the melt filter, and, in the discharge region of the melt filter(s) and downstream of the melt filter, melt valves (25) and/or melt deflectors are provided, subsequent to which the discharge extruder is situated and the worm tips are mounted.

Systems for producing superabsorbent polymer particles for use in agricultural applications are disclosed. A monomer is graft polymerized onto a starch to form a starch graft copolymer. The moisture content of the starch graft copolymer is reduced through use of an extruder.

A method of manufacturing bulked continuous carpet filament, in various embodiments, comprises: (A) providing an expanded surface area extruder; (B) providing a spinning machine having an inlet that is operatively coupled to an expanded surface area extruder outlet; (C) using a pressure regulation system to reduce the pressure within the expanded surface area extruder; (D) passing a plurality of flakes comprising recycled PET through the expanded surface area extruder to at least partially melt the plurality of flakes to form a polymer melt; and (E) substantially immediately after passing the plurality of flakes through the expanded surface area extruder, using the spinning machine to form the polymer melt into bulked continuous carpet filament. In some embodiments, the method may include passing the plurality of flakes comprising recycled PET through a PET crystallizer prior to extrusion.