The invention relates to a device (1) and method for the production of plastic parts (2), having a first plastic feed device (3a) for feeding a first liquid plastic starting component (K1); a second plastic feed device (3b) for feeding a second liquid plastic starting component (K2); a mixing device (5) with a mixing chamber (6), wherein in the mixing chamber the liquid plastic starting components that can be fed by the plastic feed devices can be mixed to form a plastic mixture (KG); a discharge nozzle (7) for discharging the plastic mixture; and a cooling device (8) for the mixing device, wherein a drying device (9) surrounding the mixing device at least in regions is provided, wherein the drying device has a separating device (10), a drying chamber (T) formed between the separating device and the mixing device, and a desiccant feeding device (11) opening into the drying chamber.

A high-pressure mixing device adapted to form a polymeric mixture from the reaction of two or more reactive liquid components or resins, comprises a head-body provided with a mixing chamber having an inner cylindrical surface with inlet and outlet openings for injecting and recirculating reactive components; a duct for delivering the mixture, communicating with the mixing chamber; a valve body with recirculation longitudinal slots, sliding into the mixing chamber between a backward position in which it clears the inlet openings and enables to mix components, and an advanced position, in which the slots put inlet openings in communication with outlet openings for recirculating the reactive components; the delivery duct, of the self-cleaning type, is a single-piece tubular element, removably fastenedby means of fixing membersand can be inserted into a hole transversal to the mixing chamber passing through the head-body; the tubular element has an intermediate transversal hole aligned with the mixing chamber with a diameter greater than a diameter of the mixing chamber for compensating, while assembling, for possible inevitable errors of alignment and mutual positioning due to processing tolerances of the parts to be coupled and for avoiding protrusions of the walls of the transversal hole from forming inwardly of the mixing chamber of the head-body, protrusions that might interfere with the end the walls of the valve member during the movement in the hole passing through the thickness of the tubular element until the end of said hole leading into the delivery chamber and that extends the mixing chamber to the wall of the self-cleaning delivery duct. Between the tubular element and the pass-through hole in the head-body a gap is defined, i.e. a certain coupling tolerance with a clearance between the tubular element and the hole, enabling to insert and remove the tubular element into/from the pass-through hole. Sealing elements prevent the leakage of polymeric mixture and lubricant liquid in the aforesaid gap; analogously, between the surface of the cap and the second holeobtained in a opposite position with respect to the holea respective gap with clearance is defined where an elastic or elasto-plastic sealing is interposed; the valve member, in the advanced and penetrating position into the hole of the tubular element, is separated therefrom by a gap, with a sealing member interposed therebetween; the gap prevents the metal-on-metal contact on the front part of the valve element when it enters into the intermediate hole; generally, thanks to gaps, the assembly and coupling of respective components is eased, facilitating the centering and mutual angular posit

A method for processing polycondensates, wherein the material in the form of granules or recyclate is processed to form a melt, the method including the following steps: a) feeding the material into a vacuum lock where the material is held below atmospheric pressure; b) conveying the material from the vacuum lock into a first extruder having a filling region and a feed zone that are held below atmospheric pressure, wherein the material is at least partially melted in the first extruder; c) conveying the melted material from the first extruder into a second, twin-screw extruder with two screws that turn in the opposite direction. The second extruder has at least one degassing zone and a metering zone that follows in the conveying direction. The melted material is degassed in the degassing zone and the melted material is pressurized in the metering zone and is output out of the second extruder.

The present invention is directed to a method and a system for the production of at least one polymeric yarn comprising means for mixing a polymer (1) with a first solvent yielding a mixture; means for homogenizing the mixture; means for rendering the mixture inert (21, 22, 23); means for dipping the mixture into a quenching bath (30), wherein an air gap is maintained before the mixture reaches the quenching bath (30) liquid surface forming at least one polymeric yarn; means for drawing (41) the at least one polymeric yarn at least once; means for washing (5) the at least one polymeric yarn with a second solvent that is more volatile than the first solvent; means for heating the at least one polymeric yarn (6); means for drawing at room temperature (7) the at least one polymeric yarn at least once; and means for heat drawing (8) the at least one polymeric yarn at least once.

The instant invention also concerns a system and method of dosing a polymer mixture with a first solvent into an extruder (26), a device (5), a system and a method of solvent extraction from at least one polymeric yarn, and a method and system of mechanical pre-recovery (4) of at least one liquid in at least one polymeric yarn.

Extrusion head 1 for manufacturing hose-like parisons from an extruded plastic material, which are made up from at least one first layer and a second layer, wherein the extrusion head 1 comprises the following: a first manifold 15 with a connection 2 for a first extruder, a second manifold 19 with a connection 8 for a second extruder 3, a first flow channel 17 with an annular first outlet opening 18 for producing a first layer, wherein the first flow channel 17 is fed by the first manifold 15, a second flow channel 21 with an annular second outlet opening 22 for producing a second layer, wherein the second flow channel 21 is fed by the second manifold 19, and a mixer 27 within the second flow channel 21 with a connection 54 for introducing a foaming agent.

This application is directed to polymer blends of polyethylene naphthalate, polytrimethylene terephthalate, and polyethylene naphthalate, for use in fibers, such as carpet fibers, and other applications. This application is also directed to methods of producing such polymer blends and fibers.

The present invention is directed to a method and a system for the production of at least one polymeric yarn comprising means for mixing a polymer (1) with a first solvent yielding a mixture; means for homogenizing the mixture; means for rendering the mixture inert (21, 22, 23); means for dipping the mixture into a quenching bath (30), wherein an air gap is maintained before the mixture reaches the quenching bath (30) liquid surface forming at least one polymeric yarn; means for drawing (41) the at least one polymeric yarn at least once; means for washing (5) the at least one polymeric yarn with a second solvent that is more volatile than the first solvent; means for heating the at least one polymeric yarn (6); means for drawing at room temperature (7) the at least one polymeric yarn at least once; and means for heat drawing (8) the at least one polymeric yarn at least once.

The instant invention also concerns a system and method of dosing a polymer mixture with a first solvent into an extruder (26), a device (5), a system and a method of solvent extraction from at least one polymeric yarn, and a method and system of mechanical pre-recovery (4) of at least one liquid in at least one polymeric yarn.

The present invention is directed to a method and a system for the production of at least one polymeric yarn comprising means for mixing a polymer (1) with a first solvent yielding a mixture; means for homogenizing the mixture; means for rendering the mixture inert (21, 22, 23); means for dipping the mixture into a quenching bath (30), wherein an air gap is maintained before the mixture reaches the quenching bath (30) liquid surface forming at least one polymeric yarn; means for drawing (41) the at least one polymeric yarn at least once; means for washing (5) the at least one polymeric yarn with a second solvent that is more volatile than the first solvent; means for heating the at least one polymeric yarn (6); means for drawing at room temperature (7) the at least one polymeric yarn at least once; and means for heat drawing (8) the at least one polymeric yarn at least once.

The instant invention also concerns a system and method of dosing a polymer mixture with a first solvent into an extruder (26), a device (5), a system and a method of solvent extraction from at least one polymeric yarn, and a method and system of mechanical pre-recovery (4) of at least one liquid in at least one polymeric yarn.

A gas-assisted rubber wet mixing preparation apparatus is disclosed, including a rack, a reactor is fixedly mounted below the rack; a mixing chamber in an ellipsoidal shape is provided inside the reactor; the reactor is provided with a plurality of feed ports, the feed ports are provided at an included angle with respect to the horizontal plane; spray guns cooperating with the feed ports are fixedly mounted on an outer wall of the reactor, a material storage tank and a gas supply device are connected to the spray gun; the spray guns and the material storage tanks are in one-to-one correspondence, and the spray guns are connected to the corresponding material storage tanks respectively; a discharge port is further provided below the reactor, and a receiver tray is provided below the discharge port.

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.