摘要:
A method of manufacturing PET nurdles comprises the steps of grinding a plurality of recycled PET bottles into a group of polymer flakes and of washing the group of polymer flakes to remove at least a portion of one or more contaminants from a surface of the flakes. The group of flakes comprises a first plurality of flakes that consist essentially of PET and a second plurality of flakes that do not consist essentially of PET. The method comprises the steps of scanning the washed group of flakes to identify the second plurality of flakes, and of separating the second plurality of flakes from the first plurality of flakes. The second plurality of flakes is molten to produce a polymer melt; via providing an extruder that extrudes material in a plurality of different extrusion streams; via reducing a pressure within the extruder to between about 0 millibars and about 25 millibars; while maintaining the pressure within the extruder between about 0 millibars and about 25 millibars, passing the polymer melt through the extruder so that the polymer melt is divided into a plurality of extrusion streams, each having a pressure between about 0 millibars and about 25 millibars. After passing the polymer melt through the extruder, the polymer melt is filtered through at least one filter. The polymer melt is then pelletized to form a plurality of PET nurdles.
摘要:
Process for producing an elastomeric compound (108) comprising at least one elastomeric polymer (102), a silica-based reinforcement filler (103) and at least one silane coupling agent (104), the process comprising: - providing a batch mixer (101) comprising a mixing chamber, a pair of rotors housed in the mixing chamber and a piston arranged above the rotors and movable to and from the pair of rotors; - feeding said batch mixer with the above components; - mixing, in said batch mixer and for a first predetermined time interval, said components; - completely unloading said batch of intermediate compound (105) from said batch mixer; - providing a twin-screw conical mixer (201) having a mixing chamber (202) provided with an inlet mouth (203) and an outlet mouth (204), wherein the mixing chamber houses two conical screws (205); - feeding said twin-screw conical mixer with said batch of intermediate compound; - mixing said intermediate compound in said twin-screw conical mixer; - unloading said elastomeric compound from the twin-screw conical mixer.
摘要:
Provided is a polymer, excluding natural rubber, which is ready for introduction into a kneading machine and which provides a kneaded mixture with excellent filler dispersion, and a rubber composition and a pneumatic tire containing the polymer.
摘要:
Vorrichtung (1) und Verfahren zur Herstellung einer gefärbten Kunststoff-Schmelze (S 1 ) und einer ungefärbten Kunststoff-Schmelze (S 2 ), umfassend eine Mehrwellen-Schneckenmaschine (2), eine erste (3) und eine zweite (4) Dosiereinrichtung und eine Steuereinrichtung (5) zum Auswählen zwischen einem ersten Betriebsmodus (B 1 ) zur Herstellung der gefärbten Kunststoff-Schmelze (S 1 ) und einem zweiten Betriebsmodus (B 2 ) zur Herstellung der ungefärbten Kunststoff-Schmelze (S 2 ), wobei die erste Dosiereinrichtung zum Zuführen eines ungefärbten Kunststoffmaterials (M) durch eine erste Zuführöffnung (16) in ein Gehäuse (6) der Mehrwellen-Schneckenmaschine und die zweite Dosiereinrichtung zum Zuführen zumindest eines Farbmittels (F) durch eine zweite Zuführöffnung (17) in dieses Gehäuse dient. Dadurch soll eine einfache, flexible und wirtschaftliche wahlweise Herstellung einer gefärbten und einer ungefärbten Kunststoff-Schmelze ermöglicht werden.
摘要:
Process and device for the production of thermoplastic moulding compounds, in particular for the production of acrylonitrile-butadiene- styrene ABS, wherein at least two reagents are fed to a rotor-stator unit (10) which comprises at least one stator (30) and at least one rotor (20) that is rotatable relative to the stator (30) about an axis of rotation (A), wherein the stator (30) has at least one stator gear ring (31) and the rotor (20) has at least one rotor gear ring (21) and the stator gear ring (31) and the rotor gear ring (21) are spaced apart from one another in a radial direction and are arranged so as to overlap in an axial direction, and wherein the reagents are dispersed to form a dispersion in the rotor-stator unit (10).
摘要:
A PVB resin composition (R) contains PVB resin (P) and a first resin (Q). A resin molding (U) is formed from a resin (T). The resin (T) includes the PVB resin composition (R) added to a second resin (S). The first resin (Q) may be, for example, PE, PP, PS, ABS, PVC, PET, vinyl acetate, PC, acrylic resin or a copolymer thereof, or a plastic container-recycled material containing one of these resins.
摘要:
The present disclosure provides methods and apparatuses providing uniform polyamide pellets. In one example, a method of producing uniform pellets of a polyamide polymer can comprise steps of cutting a strand of an extruded polyamide polymer at a cutting speed substantially proportional to a throughput of the polyamide polymer to achieve polymer pellet uniformity, and adjusting one or more process parameters to maintain a uniformity of the polyamide pellets.