A method of manufacturing a plurality of colors of bulked continuous carpet filament from a single multi-screw extruder which, in various embodiments, comprises: (A) passing PET through an extruder that melts the PET and purifies the resulting PET polymer melt; (B) splitting the extruded polymer melt into a plurality of melt streams and adding a colorant to each of the plurality of melt streams; (C) using one or more static mixers (e.g., thirty six static mixers) to substantially uniformly mix (e.g., homogeneously mix) each of the plurality of melt streams with its respective added colorant; and (D) feed each of the uniformly mixed and colored plurality of melt streams into a respective spinning machines that turns the polymer into filament for use in manufacturing carpet, rugs, and other products.

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.

A process for producing a rubber mixture in a mixing apparatus having at least one mixing chamber (4, 4) in which rotors (5) are disposed, wherein a plant control system by means of which process parameters (especially the speed of the rotors (5), the suction output of a suction device (13, 14, 15) and the mixing time) are controlled by open- and closed-loop control is provided, wherein at least one rubber is mixed in the mixing chamber with at least one filler, especially silica, preferably with addition of at least one coupling agent, especially a silane, and wherein the gas mixture present in and above the mixing chamber is sucked out by means of the suction device, wherein volatile organic compounds, especially alcoholic gases, present in the gas mixture sucked in are detected continuously, wherein, in the event of exceedance of a concentration of organic compounds in the gas mixture sucked in that has been defined as the control limit, the concentration measured is employed as control variable in the plant control system for closed-loop control of at least one of the process parameters, and wherein, in the event of exceedance of a concentration of organic compounds in the gas mixture sucked in that has been defined as the safety limit, there is a safety shutdown of the mixing apparatus by means of the plant control system.

An apparatus, for producing a mixture of at least one gas and at least one liquid plastic component, includes a mixing device that is connected, via a first pipe, to an introducing device for the at least one gas and is connected, via a second pipe, to a conveying device for the at least one liquid plastic component. The introducing device and the conveying device are piston pumps that have pistons.

A process for producing a rubber mixture in a mixing apparatus having at least one mixing chamber (4, 4) in which rotors (5) are disposed, wherein a plant control system process parameters (especially the speed of the rotors (5), the suction output of a suction device (13, 14, 15) and the mixing time) are controlled by open- and closed-loop control is provided, wherein at least one rubber is mixed in the mixing chamber with at least one filler, especially silica, preferably with addition of at least one coupling agent, especially a silane, and wherein the gas mixture present in and above the mixing chamber is sucked out by the suction device, wherein volatile organic compounds, especially alcoholic gases, present in the gas mixture sucked in are detected continuously, wherein, in the event of exceedance of a concentration of organic compounds in the gas mixture sucked in that has been defined as the control limit, the concentration measured is employed as control variable in the plant control system for closed-loop control of at least one of the process parameters, and wherein, in the event of exceedance of a concentration of organic compounds in the gas mixture sucked in that has been defined as the safety limit, there is a safety shutdown of the mixing apparatus via the plant control system.

The invention relates to a process for preparing polymeric particles, based on the use of a polyester polymer (PE) comprising units from a dicarboxylic acid component and a diol component, wherein at least 2 mol. % of the diol component is a poly(alkylene glycol). The process comprises the melt-blending of the aromatic polymer (P) with the PE, the cooling the blend and the recovery of the particles by dissolution of the PE into water. The present invention relates to polymeric particles obtained therefrom and to the use of these particles in SLS 3D printing, coatings and toughening of thermoset resins.

The invention relates to an extrusion process for the production of expandable vinyl aromatic polymer granulate comprising mixing first and second additives with first and second polymer components, respectively, in dedicated mixers.

A supplying apparatus and a supplying method of granular material in which granular material is supplied to a measuring container provided on a lower side so as to reach a target measurement value which is determined in advance. The supplying apparatus includes a storage container storing granular material, a valve body provided in the storage container so as to be opened when granular material is supplied, and a control section controlling open and close operations of the valve body. The control section keeps the valve body at an open position until a detection value of a detecting section of the measuring container becomes a predetermined value smaller than the target measurement value when the target measurement value exceeds a threshold value which is determined in advance. The control section opens the valve body in a pulsed way until the detection value of the detecting section becomes the target measurement value when the target measurement value is under the threshold value.

The invention relates to a device (01, 19, 23) for foaming a viscous material (02), said viscous material (02) being conveyed through a first conveyor pipe (05) using a first conveying means (04) at a first conveying pressure, and a gas (07) being conveyed through a second conveyor pipe (08) at a second conveying pressure, and the second conveyor pipe (08) and the first conveyor pipe (05) becoming conjoined at an opening (15), and a discharge device (17) being provided downstream of the opening (15) so as to allow a pressure-relieving discharge of the mixture (14) made up of viscous material (02) and gas (07), a gas injection valve (09) being arranged at the opening (15), said gas injection valve (09) allowing to inject gas bubbles (25) into the viscous material (02).

Disclosed is a method for the batch-based manufacture of a flowable coating material, in particular water-based or solvent-containing paint, from a plurality of components. The method includes feeding batch components into a process mixing container, mixing the components in the process mixing container to form a mixture having a preliminary composition, transferring at least part of the mixture having the preliminary composition from the process mixing container into a reception container, ascertaining an actual state of the mixture having the preliminary composition during transfer into the reception container, determining a deviation of the actual state of the mixture having the preliminary composition from a predefined setpoint state, ascertaining an adjustment quantity for the components required to reach the setpoint state, and topping up the adjustment quantity of the components into the preliminary mixture, while the preliminary mixture is being transferred from the process mixing container into the reception container.