In a method and an apparatus for increasing the intrinsic viscosity of a polycondensate melt at negative pressure, the melt enters a chamber, in which a negative pressure of less than 20 mbar prevails, through a perforated plate or a screen having openings with a diameter of less than 0.5 mm. The melt passes through this chamber in free fall in thin threads and remains in a reservoir beneath the chamber for at least one minute. The melt is moved constantly in the reservoir, and discharged from the reservoir, by a helical mixing and discharge part.

A method for manufacturing an elastic layer on site provides for downsizing an aged artificial turf into artificial turf fragments, processing the artificial turf fragments for generating a plastic melt, after the plastic melt solidifies, downsizing the solidified plastic melt into plastic particles, mixing the plastic particles with a binding agent for forming a fluid elastic composite, and applying the fluid elastic composite on a substrate at the site for forming the elastic layer.

Provided is a method for preparing a recycled ABS resin, and the method for preparing a recycled ABS resin includes: preparing an extrusion feed including an acrylonitrile butadiene styrene (ABS) base resin including polyurethane, a metal carboxylic acid salt, and a polyhydric alcohol; and supplying the extrusion feed to an extruder to perform a depolymerization reaction of the polyurethane and extruding the extrusion feed.

The invention relates to an apparatus for the pretreatment and subsequent conveying or plastification of plastics, with a container with a mixing and/or comminution implement that is rotatable around an axis of rotation, wherein, in a side wall, an aperture is formed, through which the plastics material can be removed, a multiscrew conveyor being provided, with at least two screws rotating in a housing, wherein the imaginary continuation of the longitudinal axis of the conveyor in a direction opposite to the direction of conveying passes the axis of rotation, where, on the outflow side, there is an offset distance between the longitudinal axis of the screw closest to the container, on the outflow side, and the radius that is parallel to the longitudinal axis, and in that the screws co-rotate.

The invention relates to a method and a device for introducing and/or adding non-dry-powder additive materials and/or coating materials with a liquid, solid, semi-solid, or paste-like consistency or in suspended or emulsified form, for example, peroxides, fats, waxes, IV improvers, polymers, or similar materials, to an existing lumpy or particulate material which is moved and mixed, and optionally warmed and reduced to small pieces in a receptacle and/or compressor (1), said material being in particular polymer particles and/or flakes, wood fibers, paper cuttings, or similar materials. According to the invention, the additive material is introduced below the level of the material and/or material particles already in the receptacle (1).

A feeding device for feeding fluff and granules into an extruder includes a supplying apparatus with an outlet-side pipe piece for the granules, with which the granules can be fed while forming a granule column, the pipe piece being connected to an inlet opening of the extruder, a funnel with a funnel outlet for supplying fluff, an auger being provided within the funnel for conveying fluff, which projects through the funnel outlet and into the pipe piece, the fluff being conveyable within the granule column, and the auger being configured to be a double-start and so as to also convey parts of the granules and/or to compact the fluff with a compacting device.

A feeding device for feeding fluff and granules into an extruder includes a supplying apparatus with an outlet-side pipe piece for the granules, with which the granules can be fed while forming a granule column, the pipe piece being connected to an inlet opening of the extruder, a funnel with a funnel outlet for supplying fluff, an auger being provided within the funnel for conveying fluff, which projects through the funnel outlet and into the pipe piece, the fluff being conveyable within the granule column, and the auger being configured to be a double-start and so as to also convey parts of the granules and/or to compact the fluff with a compacting device.

An vehicle interior sheet, particularly a vehicle interior sheet using a waste TPO composite sheet capable of preventing environmental pollution by recycling industrial waste, and a method of manufacturing the same includes manufacturing a powder by pulverizing a waste TPO composite sheet, manufacturing recycled TPO resin pellets by processing the powder using an extruder, and manufacturing a recycled TPO layer by subjecting the recycled TPO resin pellets to calendering or extrusion molding.

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.

A drying device includes a mixing unit fixedly connected with a drying unit. The drying unit is erected on a bench. The mixing unit includes a virgin material loader and a regrind material loader, which are respectively connected to the top of a mixing component. The bottom of the mixing component is connected with a drying unit through a buffer hopper with level sensor. A drying process with the functions of mixing and drying plastic particles integrates the mixing process and the drying process into a set of processes, saving the control cost and working space. The regrind materials are directly fed by the suction device above the equipment, which can be used as soon as they are produced, reducing the cost of manual treatment and reducing the absorption of air moisture. The user can control the mixing proportion and drying parameters on the control panel at the same time.