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 flakes through a PET crystallizer; (E) passing the group of flakes through an MRS extruder while maintaining the pressure within the MRS portion of the MRS extruder below about 18 millibars; (F) passing the resulting polymer melt through at least one filter having a micron rating of less than about 50 microns; and (G) forming the recycled polymer into bulked continuous carpet filament that consists essentially of recycled PET.

A rubber extruding machine 1 comprises two or more rubber extruders 2, an extrusion head 3 to which the rubber extruders 2 are connected, and a decompression device 4. A pre-former 6 of the extrusion head comprises: rubber flow paths 20 including respective flow paths 22 through which the extruded unvulcanized rubber compounds G pass respectively; a merging position P at which the rubber flow paths 20 are confluent; and a vent channel 21 whose one end communicates with the merging position P and the other end is connected to the decompression device.

The present specification generally relates an aliphatic polyester material and a process for converting said aliphatic polyester material into a textile that is preferable for use as an artificial leather substrate. The present invention discloses: (i) a novel aliphatic polyester composition comprising a polyhydroxyalkanoate (referred to herein as PHA), an ethylene-vinyl acetate copolymer resin (referred to herein as EVA) or similarly functional such material, and an ester of citrate acid plasticizer or similarly functional such material; and (ii) an inventive process for converting the novel aliphatic polyester composition into a textile by (a) melt extruding the aliphatic polyester material into an aliphatic polyester sheet; (b) heating said sheet; and (c) monoaxially or biaxially orienting said sheet in the machine direction followed by orientation in the transverse direction; and/or heating the monoaxially or biaxially oriented sheet at a temperature above the Tg of both the polyhydroxyalkanoate and ethylene-vinyl acetate resin components but below the melting point of the polyhydroxyalkanoat component.

A ram extrusion apparatus including a die having several thermal zones, a hopper for introducing a granular polymer resin to the die, and a ram for moving the granular polymer resin through the thermal zones of the die and out from an outlet end thereof at a temperature above the crystalline melt temperature of the polymer resin. The hopper may be designed to deliver the polymer resin into a resin inlet of the die in a plurality of specifically metered amounts which may vary across a width of the resin inlet end of the die. The apparatus may further include one or more finishing tables positioned after the outlet end of the die for receiving and moving the extruded resin away from the outlet end of the die so that there is no backpressure on the extruded resin, and which provide compression force and even cooling to the extruded resin.

A medical tube includes a distal portion provided on one end side having a first outer diameter, a first inner diameter, and a first thickness; a proximal portion provided on the other end side having a second outer diameter greater than the first outer diameter, a second inner diameter greater than the first inner diameter, and a second thickness greater than the first thickness; and an intermediate portion provided between the distal portion and the proximal portion and having an outer diameter, an inner diameter, and a thickness which gradually vary. Thus, a medical tube is provided having improved operability and which reduces the likelihood of bending during an operation.

A method of producing a heat conductive sheet without using a high-cost magnetic field generator. This is achieved by allowing a large amount of a fibrous filler to be contained in a thermosetting resin composition, so that good heat conductivity is obtained without applying a load that may interfere with the normal operation of a heat generating body and a radiator to the heat generating body and the radiator when the heat conductive sheet is disposed therebetween. The method includes: a step (A) of dispersing a fibrous filler in a binder resin to prepare a heat conductive sheet-forming composition; a step (B) of forming a molded block using the prepared heat conductive sheet-forming composition according to an extrusion molding method or a die molding method; a step (C) of slicing the formed molded block into a sheet; and a step (D) of pressing the sliced surface of the obtained sheet.

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 flakes through a PET crystallizer; (E) passing the group of flakes through an MRS extruder while maintaining the pressure within the MRS portion of the MRS extruder below about 18 millibars; (F) passing the resulting polymer melt through at least one filter having a micron rating of less than about 50 microns; and (G) 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 flakes through a PET crystallizer; (E) passing the group of flakes through an MRS extruder while maintaining the pressure within the MRS portion of the MRS extruder below about 18 millibars; (F) passing the resulting polymer melt through at least one filter having a micron rating of less than about 50 microns; and (G) forming the recycled polymer into bulked continuous carpet filament that consists essentially of recycled PET.

A device for extruding plasticized masses and plastic powdered materials includes an extruder, a deformation element with a working channel having coaxially located profiled portions, and a forming die. The surface of each of the profiled portions includes two couples of wave-like surfaces acting in antiphase, symmetric with respect to the working channel axis and smoothly passing one into the other. The maximal increments of the distances from the channel surface to the axis thereof for one couple of these surfaces is located in a plane passing through the axis of the channel. Such maximal increments for the other couple are located in the profiled surface, the generatrices of which profiled surface are orthogonal to the axis of the channel along the entire length of the same and are orthogonal to said plane at the inlet and the outlet of each profiled portion.

Methods and systems for controlling the moisture content of biodegradable and bioresorbable polymer resin during extrusion above a lower limit that allows for plasticization of the polymer resin melt and below an upper limit to reduce or prevent molecular weight loss are disclosed. Methods are further disclosed involving plasticization of a polymer resin for feeding into an extruder with carbon dioxide and freon.