A composite material and method of producing a composite material for use in fabrication, building and construction is disclosed. A composition as disclosed herein comprises a high proportion of particulate waste material dispersed in a matrix of thermoplastic polymer and wax. A method of producing a composite material comprises melt mixing thermoplastic polymer and wax with a particulate material, thereby dispersing the particulate material in a melt mixture of the composite material.

An extruder system for degassing a mixture, comprising a first extruder, a second extruder arranged downstream of the first extruder and a transfer zone formed between these extruders, characterized by a pressure regulating device which can regulate the pressure at the outlet of the first extruder.

An extruder system for degassing a mixture, comprising a first extruder, a second extruder arranged downstream of the first extruder and a transfer zone formed between these extruders, characterized by a pressure regulating device which can regulate the pressure at the outlet of the first extruder.

The invention relates to a process for devulcanizing a vulcanized rubber mixture, comprising the following steps: A) providing or producing a vulcanized rubber mixture, B) comminuting the vulcanized rubber mixture into a granulate of vulcanized rubber particles, C) extruding the vulcanized rubber particles produced in step B) in a twin-screw extruder to form a devulcanized rubber mixture, wherein, during the extruding in step C) at least one regeneration reagent is added to the extruded rubber particles, wherein the regeneration reagent comprises at least one silane, at least one plasticizer, at least one aging stabilizer or mixtures thereof. The invention also comprises an apparatus for performing the method and the uses of the apparatus, and a rubber mixture and also a pneumatic vehicle tyre or a technical rubber article comprising a component composed of the rubber mixture.

A single-screw extruder (100), and a method. The extruder (100) comprises—a cylindrical rotor member (1) having diameter (D) and length (L) and comprising a feeding zone (14), —the rotor member (1) arranged in a barrel (2), —the cylindrical surface of the rotor member (1) carrying cavity/cavities and/or projection(s) (5) arranged in helically extending rows, —the helically extending row(s) of the rotor member (1) having a pitch (P) and depth (d) in the feeding zone (14) of the rotor member, and the extruder (100) further compris-ing—a drive system (4) for the rotation of the rotor member (1) in the barrel (2). The relation of the depth (d) to the diame-ter (D) of the rotor member, i.e. d:D, is not more than 1:20, and the relation of the pitch (P) of the rotor member to the di-ameter (D) of the rotor member, i.e. P:D, is not more than 1:4.

A thermoplastic resin pellet is columnar. A cross-sectional shape taken along a plane orthogonal to a height direction of the thermoplastic resin pellet has a longer diameter represented by “a” and a shorter diameter represented by “b”. A ratio a/b is greater than or equal to 1.0, and the ratio a/b is less than or equal to 2.6. A ratio α of a unit height volume of a cylindrical portion of a hopper of a molding machine, into which the thermoplastic resin pellet is loaded, to a volume of the thermoplastic resin pellet is greater than 16. A method for manufacturing an electric cable includes supplying the thermoplastic resin pellet to the hopper, melting the thermoplastic resin pellet in the cylinder to supply molten resin to the die, and extruding the molten resin from the die to form a sheath on a core wire.

A method for controlling polymer viscosity quality in a compounding process of polymers (110) using at least one extruder (111) is disclosed. The method comprises: a) at least one measurement step (112), wherein at least one influence variable affecting viscosity of the compound is determined by using at least one sensor (114); b) at least one prediction step (116), wherein an expected viscosity (117) of the compound is determined considering the influence variable by using at least one prediction unit (118), wherein the prediction unit (118) comprises at least one analysis tool comprising at least one trained model; c) at least one evaluation step (120), wherein the expected viscosity (117) of the compound is compared to at least one pre-defined and/or pre-determined threshold value, wherein at least one item of output information is generated depending on said comparison; and d) at least one control step (122), wherein the item of output information is displayed using at least one display device (124), wherein the output information comprises at least one handling recommendation (126) for at least one setting of the extruder (111). Further disclosed are a computer program, specifically an application, and a controlling system (138) for controlling polymer viscosity quality in a compounding process of polymers (110).

A performance of a die is improved. An injection hole IH, a nozzle NZa and a nozzle NZb are formed in a center member DIa of a die DI to extend from an extrusion surface ES to an injection surface IS. A heat source HT and a plurality of heat insulating layers HI1 are arranged inside the center member DIa. One of the plurality of heat insulating layers HI1 is adjacent to the nozzle Nzb and is closer to the extrusion surface ES than the heat source HT. The other of the plurality of heat insulating layers HI1 extends in a direction from the extrusion surface ES toward the injection surface IS at a position being farther from the nozzle NZb than the heat source HT.

A rubber extrusion device comprises a control plate having an adjustment flow path communicating with an extrusion flow path formed in a head and an extrusion port formed in a die is interposed between the head and the die; the control plate is slid along and between the head and the die to change a position of a communication region of the extrusion flow path with respect to the adjustment flow path at a leading end opening of the extrusion flow path to set the control plate at a desired position; and unvulcanized rubber, obtained by mixing and kneading rubber material while extruding the rubber material forward with a screw, passes through the extrusion flow path and the adjustment flow path to be extruded from the extrusion port.

The present invention aims to provide a heat-shrinkable polyester film roll having decreased generation of wrinkles or longitudinal shrink mark. The present invention provides a film roll of a heat shrinkable polyester film, wherein a polyester of the polyester film contains recycled raw material from a PET bottle and an acid component of the polyester comprises isophthalic acid, and the film roll satisfies a specific average value of a shrinkage, specific isophthalic acid ratio, and specific thickness unevenness.