Disclosed is a process for preparation of a propylene-based polymer composition involving the steps of: (a) mixing a propylene-based polymer and a peroxydicarbonate in a mixing device, wherein the mixing takes place at a temperature of ≤30° C., wherein the peroxydicarbonate is introduced into the mixing process in a dry form; (b) keeping the mixed composition at a temperature of ≤30° C.; (c) feeding the mixed composition into a melt extruder; (d) homogenizing the mixed composition at a temperature where the propylene-based polymer is in solid state during an average residence time of ≥6.0 and ≤30.0 seconds; (e) further homogenizing the mixed composition at a temperature at which the propylene-based polymer is in the molten state; and (f) extruding the homogenized material from a die outlet of the melt extruder followed by cooling and solidification; wherein the steps (a) through (f) are conducted in that order.

Disclosed are a microwave-enhanced extruder facility and an organic reaction module. The microwave-enhanced extruder facility includes a screw extruder and a microwave generator. The screw extruder includes a feeding module and an organic reaction module. The feeding module includes a plurality of conveying blocks connected to each other. First barrels are clamped in the first conveying blocks, and screws are arranged in the first barrels. The organic reaction module is connected to the microwave generator and includes a second conveying block, and the microwave generator is connected to the second conveying block. The second conveying block is provided with two clamping plates and a frame connecting the two clamping plates. A second barrel is clamped in the second conveying block. Waveguide tubes are connected to the upper and lower ends of the second conveying blocks respectively.

A husk plastic composite comprises a composition including: PVC 10˜20 wt %; vinyl chloride/vinyl acetate (VC/VAC) copolymer 10˜30 wt %; styrene-acrylonitrile copolymer (SAN) 1˜5 wt %; chlorinated polyethylene (CPE) 1˜5 wt %; rice husk powder 10˜40 wt %; inorganic filler 10˜40 wt %; internal lubricant 0.1˜1 wt %; external lubricant 0.1˜1 wt %, and heat stabilizer 1˜5 wt %. The VC/VAC copolymer in the husk plastic composition provided by the present invention can allow the composition to be processed by relatively lower processing temperature to save energy consumption. It will also prevent the husk powder from being burnt or decomposed due to high temperature during the heating process to allow this natural material being added in a large amount in the composition. The present invention can reduce the amount of PVC through a large amount of filling additives but still maintain in good product mechanical properties. The particle size of the husk is preferably in the range of 0.10˜0.60 mm for better hardness, stiffness and wood-like texture in the final product.

A housing component, for the production of a housing of a multi-shaft screw machine, includes a base body, in which at least two bores interpenetrating each other are configured. The bores extend in a conveying direction through the base body and are limited transversely to the conveying direction by an inner wall. The inner wall configures at least one first wall section and at least one second wall section such that the at least one first wall section is harder than the at least one second wall section. The wall sections, for example, are generated by material application. The housing component allows for a reliable wear protection and a positive influence on the material processing.

A method of processing of a polymer blend is provided. The method includes the step of introducing a polymer material and a secondary polymer material into a barrel of an extruder. A user-selected gas having a supercritical point is injected into the barrel. The user-selected gas is below the supercritical point thereof. The polymer material, the secondary polymer material and the user-selected gas are mixed within the barrel to form a polymer blend. The polymer blend is ejected from the barrel into a mold, pelletizer or the like.

Disclosed are a microwave-enhanced extruder facility and an organic reaction module. The microwave-enhanced extruder facility includes a screw extruder and a microwave generator. The screw extruder includes a feeding module and an organic reaction module. The feeding module includes a plurality of conveying blocks connected to each other. First barrels are clamped in the first conveying blocks, and screws are arranged in the first barrels. The organic reaction module is connected to the microwave generator and includes a second conveying block, and the microwave generator is connected to the second conveying block. The second conveying block is provided with two clamping plates and a frame connecting the two clamping plates. A second barrel is clamped in the second conveying block. Waveguide tubes are connected to the upper and lower ends of the second conveying blocks respectively.

A twin screw extruder (10) for producing a fiber-reinforced resin composition, which is obtained by charging the extruder with a thermoplastic resin and reinforcing fibers in roving form and the reinforcing fibers being fibrillated/cut and being dispersed/kneaded into the thermoplastic resin, comprises: a plate-shaped blade (15), which protrudes from the inner surface of a cylinder (11) and faces a screw (20) and the longitudinal direction of which faces the axial direction of the cylinder; and a height adjustment means (16) for adjusting the gap between the blade (15) and the screw (20).

The application relates to a plasticizing unit with a cylinder and a screw that is rotatably mounted in the cylinder and has a screw section which is designed as a shearing section and in which a blocking web encircling the screw core in a helical manner and a main screw thread enclosed by the blocking web are provided. A shearing web runs in the main screw thread parallel to the blocking web at a lower height than the blocking web. In this manner, two screw threads are produced which run parallel to each other and are separated by the shearing web. The threads are designed in the form of wave screw threads. Each wave screw thread is equipped with one or more wave peaks with a surface which is designed in the form of a plateau and forms a wave peak shearing surface, wherein the wave peak shearing surface is located at the same height as the surface of the shearing web in the region. The shearing web surface section which lies in the region of a wave peak shearing surface constitutes a shearing web sharing surface. A wave peak shearing surface and a shearing web shearing surface together form a total shearing surface. A specified total shearing surface together with the inner wall of the cylinder forms a shearing gap in accordance with a shearing gap size specified for the total shearing surface.

A husk plastic composite comprises a composition including: PVC 10 to 20 wt %; vinyl chloride/vinyl acetate (VC/VAC) copolymer 10 to 30 wt %; styrene-acrylonitrile copolymer (SAN) 1 to 5 wt %; chlorinated polyethylene (CPE) 1 to 5 wt %; rice husk powder 10 to 40 wt %; inorganic filler 10 to 40 wt %; internal lubricant 0.1 to 1 wt %; external lubricant 0.1 to 1 wt %; and heat stabilizer 1 to 5 wt %. The VC/VAC copolymer in the husk plastic composition can allow the composition to be processed by relatively lower processing temperature to save energy consumption, prevent the husk powder from being burnt or decomposed due to high temperature during the heating process to allow this natural material being added in a large amount in the composition and can reduce the amount of PVC through a large amount of filling additives but still maintain in good product mechanical properties.

The present invention relates to a process for the production of a reinforced polyamide (rP) in an extruder. In this process, a first mixture (M1), a second mixture (M2) and a third mixture (M3) are added into the extruder, and subsequently at least one carbon material is added to obtain a carbon containing polymerizable mixture (cpM) in the extruder. This carbon containing polymerizable mixture (cpM) is polymerized and subsequently devolatilized to obtain the reinforced polyamide (rP). Furthermore, the present invention relates to the reinforced polyamide (rP) obtainable by the inventive process.