Techniques recycle plastics in multiple successive process steps. A polymer, preferably a recyclable material, is melted using a discharge extruder, filtered using a first filter device under a positive pressure atmosphere, filtered and degassed using a degassing device, and discharged using a discharge extruder. The degassing device has at least one filter element and a vacuum chamber with a negative pressure atmosphere for filtering and degassing purposes, wherein the plastic melt can be conducted into the negative pressure atmosphere of the vacuum chamber through the filter element.

A kneading apparatus (21) that makes it possible to easily obtain a kneaded material having a favorable property includes: a screw (23) for extruding polyethylene which has been fed through a feed opening (27); a first heater (24) for heating the polyethylene which is extruded by the screw (23); and a second heater (25) for preheating liquid paraffin which is to be added, through a side-feed opening (28), to the polyethylene which is extruded by the screw (23).

The extrusion of polymer compositions based on polyvinyl chloride (PVC) and in particular to a method in which polymer compositions are produced that have an elongation at break of at least 200%, a tensile strength of at least 10 N/mm2 with a specific energy input SEI of 0.03 to 0.20 kWh/kg and in particular 0.04 to 0.16 kWh/kg. The method is expediently carried out such that a plasticizer is added in a plurality of portions to the non-composed polyvinyl chloride and mixed into said polyvinyl chloride. The method thereby offers a fast and simple possibility of producing products from finished soft PVC, the production of said products requiring only a single processing device in the form of an extruder.

Provided is a method in which a polyisobutylene having a peak top molecular weight (Mp) of 5,000 to 80,000 is easily supplied to a hydrogenated block copolymer to stably produce a thermoplastic polymer composition. Specifically, provided is a method for producing a thermoplastic polymer composition containing a hydrogenated block copolymer (a) and a polyisobutylene (b) having a peak top molecular weight (Mp) of 5,000 to 80,000 expressed in terms of standard polystyrene as determined by gel permeation chromatography, the method including a following first step and a following second step.

First step: a step of supplying the polyisobutylene (b) to a twin-screw/single-screw extruder of a counter-rotating type, to plasticize the polyisobutylene (b).

Second step: a step including a following step (i) and a following step (ii): (i) a step of supplying the hydrogenated block copolymer (a) to a twin-screw extruder; and (ii) a step of supplying the polyisobutylene (b) plasticized in the first step to the twin-screw extruder via a quantitative pump and kneading the polyisobutylene (b) together with the hydrogenated block copolymer (a) supplied in the step (i).

A thermoplastic elastomer tube can include a thermoplastic elastomer component disposed within a matrix. In an embodiment, the thermoplastic elastomer component is disposed within the matrix in a thermoplastic elastomer phase having a number of domains. At least approximately 50% of the domains of the thermoplastic elastomer component have an aspect ratio of no greater than approximately 1.5. In a particular embodiment, the thermoplastic elastomer tube comprises at least approximately 20 wt % of the thermoplastic elastomer component and no greater than approximately 50 wt % of a polyolefin component. In some embodiments, the thermoplastic elastomer component includes styrene.

A method for preparation of decontaminated natural rubber is provided. The method is characterized in that it comprises a decontamination step in which wet natural rubber coagulum passes through a system comprising an extruder and a filter installed at the extruder outlet, the extruder comprising an axially symmetrical grooved sheath comprising in its thickness grooves opening on the inner surface of the sheath.

A manufacturing apparatus of a rubber member includes an extruder that kneads and feeds a rubber material; a mouthpiece that discharges the rubber material supplied from the extruder; a support member that has a support surface opposing the mouthpiece; a rubber collection chamber that is formed between the mouthpiece and the support surface, that collects the rubber material discharged from the mouthpiece, and that has an opening in a front movement direction of the support surface with respect to the mouthpiece; and a shutter that opens and closes the opening. A plate-like rubber member is molded using the rubber material discharged from the mouthpiece onto the support surface by relatively moving the support surface and the mouthpiece.

This invention is directed to a microstructured filament that can be used to make fibers having an extruded filament having pre-cooled microfeatures in a radial spiral arrangement about a bore though the filament wherein the microfeature has a width in the range of 25 m to 40 m and height in the range of 90 m to 100 m; and, the filament having a post-cooled state having post-cooled microfeatures having physical dimensions smaller than that of the pre-cooled microfeatures. The filament can include microfeatures having a width in the range of 400 nm to 4 m and height in the range of 400 nm to 4 m. The filament and fiber can include physical characteristics selected from the group consisting of: hydrophobicity, self-cleaning, increased hydro-dynamic drag coefficients, decreased or increased aerodynamic drag coefficients, increased friction, reduced friction, optical effects, increased adhesion, decreased adhesion, oleophobicity, tactile effects, anti-blocking and any combination of these.

Systems (200) and methods for making different plastic products (202, 204) in a single melting process are provided. A method includes melting a plastic resin in a first extruder (104) to form a melt (106) and transferring at least a portion of the melt to a second extruder (114). Any portion of the melt (106) that is not transferred to the second extruder (114) is formed into a first plastic product (202). Additives (116) are blended with the melt in the second extruder to form a second melt (118), and a second plastic product (204) is formed from the second melt (118).

Provide a manufacturing method and a manufacturing device for a rubber strip capable of stably manufacturing a tape-like rubber strip of unvulcanized rubber. The rubber strip manufacturing device (1) for manufacturing a tape-like rubber strip (G2) made of unvulcanized rubber is characterized in including: a rubber extruder (3) comprising a rubber extruder main body (6) having a screw shaft (6c) for kneading and pushing the unvulcanized rubber toward an outlet opening (6d), and a gear pump (7) connected to the outlet opening (6d) of the rubber extruder main body (6) and rotary-driven by a first motor (M1); a calender head (4) comprising a pair of calender rollers (4a,4b) for rolling a shaped rubber body extruded from the rubber extruder (3) to obtain the rubber strip (G2); and a control unit (70) for controlling a second motor (M2) for rotary-driving the calender rollers in conjunction with the first motor (M1).