The invention relates to a method of preparing reclaimed rubber, especially using multi-stage screw extruders, which belongs to the field of recycling and reusing of waste rubber. The rubber powder and softener which were preliminarily mixed are compacted and added into first counter rotating twin screw extruder through thermal insulation and metering apparatus, the softener permeates the waste rubber powder uniformly under the action of temperature in the extruder to finish primary desulfurization of rubber waste powder; add preliminary devulcanized material continuously into second multi screw extruder after cooling by transformation device, rapid desulfurization and regeneration can be achieved by means of activator and shear action; The desulfurized rubber powder is cooled and transported into the third multi-screw extruder in series, the performance of deprocessing can be improved by shear action under low temperature; After extrusion, the recycled rubber is obtained by molding device and cooling device. The whole process is completed under closed oxygen isolation condition, realizing safe, simple and continuous desulfurization regeneration. It is energy saving and environmental protection with excellent properties.

A multi-screw kneader is configured to exhibit an extensional flow function before and behind holes of a disk-shaped segment and a method for producing a nano-composite uses the multi-screw kneader. The multi-screw kneader includes a plurality of kneading screws and the disk-shaped segment in a barrel. The disk-shaped segment partitions the inside of the barrel downstream of a part for supplying a kneading material and includes shaft receiving parts through which rotating shafts of the kneading screws are to rotatably pass and the holes are defined in a periphery of the shaft penetrating parts and are configured to serve as flow channels of the kneading material. The method for producing the nano-composite includes charging nanoparticles as a resin additive using the multi-screw kneader.

An intermediate transfer member including a base layer, wherein the base layer contains a thermoplastic resin and an electroconductive filler dispersed in the thermoplastic resin, and wherein the base layer has a volume resistivity of 1?10.sup.6 to 1?10.sup.13 ?.Math.cm, and the base layer has an electroconductive path index of 0.20 or less.

A treatment element for treating material by means of a screw machine comprises a conveying section and a melting section. The melting section is arranged downstream of the conveying section in a conveying direction and is connected in one piece with the conveying section. This reduces wear and increases the service life.

A substantially dry product is produced by a process comprising the steps of: removing moisture from a raw material having a first moisture content to produce the substantially dry final product having a final moisture content; (b) advancing the raw material longitudinally along and between at least a first screw and a second screw comprising at least a compression zone and a dehydrating zone which are arranged successively within the first and second screws; and (c) entrapping and removing a predetermined percentage of moisture as the raw material moves through the compression zone and dehydrating zone.

A kneader has a rotational conveyance member configured to knead the kneading material and convey the kneading material from an inlet toward an outlet by a rotational motion around an axis. The rotational conveyance member has a kneading zone configured to knead the kneading material, a first conveyance zone placed on an upstream side relative to the kneading zone and configured to convey the kneading material, and a second conveyance zone placed on a downstream side relative to the kneading zone and configured to convey the kneading material, and a conveyance force of the second conveyance zone is smaller than a conveyance force of the first conveyance zone in a case where the same conveyance object is conveyed.

Disclosed is a flame-retardant HIPS material and a preparation method thereof, comprising the following components: 90 parts to 67 parts of a HIPS resin; 8 parts to 15 parts of a brominated flame retardant; and 3 parts to 7 parts of an auxiliary flame retardant; wherein the auxiliary flame retardant is a 1,3,5-triazine compound. In the present invention, a synergistic compounding of the brominated flame retardant and the auxiliary flame retardant effectively reduces an amount of the brominated flame retardant, and a stable UL 94 (1.5 mm) V-0 flame-retardant class can be achieved. Compared with the existing brominated flame-retardant HIPS, the present invention has a low halogen content, low gas, and high cost performance ratio, which avoids excessive acid gas from forming air lines on the surface of parts, has a good appearance.

On a rotary screen filtering device for medium to high-viscosity fluids, which comprises a rotary screen mounted for rotation in a housing, which screen has at least one screen element through which fluid can flow, the rotary screen, in the region of its sealing faces and the intermediate plates are fabricated or machined together so that they are of identical height. A gap width compensation layer is then inserted between the inlet plate and the intermediate plate and/or between the outlet plate and the intermediate plate. The package of plates is then pretensioned by means of screw bolts in such a manner that all the plates lie firmly against one another up to a maximum permissible operating pressure. Lubrication gaps of defined width are created between the sealing faces and the opposing inner faces of the inlet and outlet plates.

A feeding screw machine for feeding a processing screw machine comprises a housing with at least two housing bores formed therein and screw shafts rotatably arranged in the at least two housing bores. The at least two housing bores and the at least two screw shafts define a free volume in a respective cross-sectional plane, which decreases monotonically at least in some regions for continuous compression of a material in a conveying direction. This enables an improved supply of material with a low bulk density.

Provided is a method for producing a resin composition from which can be formed a molded body having excellent tensile elongation and/or rigidity, and more preferably a molded body which stably achieves both high tensile elongation and high rigidity. An aspect of the present invention provides a method for producing a resin composition which contains a first component and a second component, said method comprising a kneading step for kneading the first component and the second component via an extruder provided with a kneading zone that includes a plurality of narrow gap zones in which the gap between a cylinder inner wall and a screw is not more than 2 mm.