An apparatus and method for a degassing apparatus with a degassing chamber and a container. The container is located within the degassing chamber and defines a holding chamber with an opening. An insert for being received in the opening. The insert including at least one conduit extending between an inlet and an outlet.

A method of manufacturing bulked continuous carpet filament from recycled polymer. In various embodiments, the method includes: (1) reducing recycled polymer material into polymer flakes; (2) cleansing the polymer flakes; (3) melting the flakes into a polymer melt; (4) removing water and contaminants from the polymer melt by dividing the polymer melt into a plurality of polymer streams and exposing those streams to pressures below 5 millibars; (5) recombining the streams; and (6) using the resulting purified polymer to produce bulked continuous carpet filament.

A process of producing a polyamide polymer using in-line vacuum finishing technology in the absence of steam or other gases. The polyamide polymer, in particular Nylon 66, Nylon 6, and copolyamides, have a high molecular weight, excellent color, and low gel content. The polyamide polymer also has a relative viscosity greater than 50 as measured in a 90% strength formic acid solution; consistent viscosity with a standard deviation of less than 1; a gel content no greater than 50 ppm as measured by insolubles larger than 10 micron; and an optical defect content of less than 2,000 parts per million (ppm) as measured by optical control system (OCS). The polymer can be made into monofilaments or a multifilament yarn.

A system comprising: (1) a grinding unit configured to receive and grind recycled PET bottles into a group of polymer flakes comprising up to about ten percent colored polymer flakes and balance substantially clear polymer flakes; (2) a washing unit configured to wash the group of polymer flakes; and (3) an extruder configured to extrude material in a plurality of different extrusion streams. The extruder may be further configured to: (1) receive a concentrate-polymer mixture comprising a mixture of the polymer flakes and a color concentrate; (2) melt the concentrate-polymer mixture to produce a polymer melt; (3) reduce a pressure within the extruder; and (4) pass the polymer melt through the extruder so that the polymer melt is divided into the plurality of extrusion streams. The system may then filter the polymer melt through at least one filter and form the polymer melt into bulked continuous carpet filament.

The present application discloses a continuous dynamic and efficient devolatilization method for a polymer/volatile system based on high mass transfer interfaces, including the following steps: providing a dynamic single-screw devolatilizer, feeding a polymer solution to the devolatilizer, wherein the polymer solution includes polymer and volatile substances with small molecule weight, and the volatile substances include organic solvents, residual monomers, water or reaction by-products; conveying and compressing polymer materials by the screw downstream a devolatilization section, and extruding the polymer materials out of the dynamic single-screw devolatilizer directly; or providing a side-feeding extruder downstream of the devolatilization section and feeding plastic additives into a devolatilized polymer melt, and then melt blending the plastic additives with the devolatilized polymer melt at an end of the dynamic single-screw devolatilizer before exiting the dynamic single-screw devolatilizer.

Systems for manufacturing bulked continuous carpet filament from polymer, where the systems are configured for: (1) passing polymer flakes through a crystalliers; (2) melting the polymer to create a first single stream of polymer melt; (3) separating the first single stream of polymer melt into multiple streams of polymer melt; (4) exposing the multiple streams of polymer melt to a pressure of between about 0 millibars and about 25 millibars in a chamber; (5) recombining the multiple streams of polymer melt into a second single stream of polymer melt; and (6) providing the second single stream of polymer melt to one or more spinning machines that are configured to form the second single stream of polymer melt into bulked continuous carpet filament.

Disclosed are processes and systems for degassing liquid resin. Resin is provided at a resin inlet and pumped into a first duct using a resin pump to achieve a first absolute pressure of at least 1.6 bar in the first duct; the resin pump and/or a flow control valve are configured to achieve a first pressure drop across the flow control valve of at least 1.5 bar; a second duct communicates the resin from the flow control valve to a storage tank; a gas evacuation system maintains a pressure in the storage tank below 100 mbar at least partly concurrently with pumping resin into the first duct.

A method of manufacturing arch support socks according to one embodiment of the present invention may include an operation (a) of preparing a resin solution by mixing polyvinyl chloride (PVC) powder and dioctyl terephthalate (DOTP) liquid resin, an operation (b) of adding a heat stabilizer to the resin solution and stirring the resin solution, an operation (c) of removing impurities of the resin solution through sieving, a de-foaming operation (d) of removing bubbles in the resin solution in a vacuum state, an operation (e) of filling the de-foamed resin solution in a molding mold, an operation (f) of heating the molding mold, and an operation (g) of adhering an anti-slip part separated from the molding mold to an arch area of a sock bottom.

A process of producing a polyamide polymer using in-line vacuum finishing technology in the absence of steam or other gases. The polyamide polymer, in particular Nylon 66, Nylon 6, and copolyamides, have a high molecular weight, excellent color, and low gel content. The polyamide polymer also has a relative viscosity greater than 50 as measured in a 90% strength formic acid solution; consistent viscosity with a standard deviation of less than 1; a gel content no greater than 50 ppm as measured by insolubles larger than 10 micron; and an optical defect content of less than 2,000 parts per million (ppm) as measured by optical control system (OCS). The polymer can be made into monofilaments or a multifilament yarn.

The device for recycling flakes from shredded and washed post-consumer plastic waste comprisesseen in the processing direction of the plastic wastea pre-treatment unit (2) for drying and homogenising the flakes from shredded and washed post-consumer plastic waste, a melting extruder (3) for melting the plastic waste dried and homogenized in the pre-treatment unit (2), a degassing extruder (5) having a connection (5a) to a vacuum source for degassing the plastic melt, a granulating device (6) for granulating the plastic melt, and an odour removal unit (8) to subject the granules an odour removal. The odour removal unit (8) has a process gas feed (10) and a gas discharge (11) for discharging an exhaust gas stream, wherein the process gas feed (10) of the odour removal unit (8) is connected to an ozone source (12) or an ozone generating device (13), whereby the odour removal unit (8) may be supplied with process gas enriched with ozone.