摘要:
A method for manufacturing a heat resistant resin composition having superior dispersibility of maleimide-based copolymer, the method including: a melt-kneading step to melt and knead a maleimide-based copolymer (A) and at least one resin (B) selected from the group consisting of ABS resin, ASA resin, AES resin, and SAN resin with an extruder; wherein: a ratio of a melt viscosity of the maleimide-based copolymer (A) with respect to a melt viscosity of the resin (B) obtained with a shear rate of 120/sec and a cylinder temperature of a kneading unit of the extruder is 1.0 or higher and lower than 3.4, is provided.
摘要:
An extruder screw includes a screw main body, conveyance portions, barrier portions, and paths. The raw materials, the conveyance of which is limited by the barrier portions, flow in from the entrance. The raw materials flowing in from the entrance flow through the paths in an opposite direction to a conveyance direction of the conveyance portions. The exit is opened in the outer circumferential surface of the screw main body at a position on an upstream side in the conveyance direction in the conveyance portions in which the entrance is opened.
摘要:
A two-shaft continuous kneading machine is disclosed wherein airtightness in a housing is assured by a simple means without using a mechanical seal. A magnetic coupling mechanism is formed between the mechanism in the housing (2) including shafts (3) of the kneading machine (1) and a carrier (5) arranged outside the housing (2). The magnetic coupling mechanism includes gear portions (3c) formed on the shafts (3), a ring gear (4) rotatably supported in the housing (2) on the outer periphery of the axial ends of both shafts (3), and a carrier (5) rotatably supported coaxially with the ring gear (4) in the outside of the housing (2). When the carrier (5) is driven, the ring gear (4) rotates because of the magnetic action between magnet portions (4b, 5b), and the shafts (3) rotates because of the meshing of the gear portions (3c, 4a). Since the inside of the housing can be sealed, airtightness can be assured.
摘要:
A process for reducing thermally induced discoloration of fluoropolymer resin produced by polymerizing fluoromonomer in an aqueous dispersion medium to form aqueous fluoropolymer dispersion and isolating said fluoropolymer from the aqueous medium to obtain the fluoropolymer resin. The process comprises: exposing the aqueous fluoropolymer dispersion to oxidizing agent.
摘要:
The invention relates to a process for extruding plastic compositions, in particular polymer melts and mixtures of polymer melts, above all thermoplastics and elastomers, particularly preferably polycarbonate and polycarbonate blends, also with the incorporation of other substances such as for example solids, liquids, gases or other polymers or other polymer blends with improved optical characteristics, with the assistance of a multi-screw extruder with specific screw geometries.
摘要:
An extruder for preparing a polymer-diluent mixture. The extruder includes an elongated housing having an inlet end, an outlet end and a bore disposed within the housing, an elongated extruder shaft having an axis of rotation, the elongated extruder shaft disposed within the bore and drivable in at least one direction of rotation, a plurality of extruder screw segments positioned along the elongated extruder shaft in a fixed angular relationship therewith, the plurality of extruder screw segments selected to form multiple extruder stages, the multiple extruder stages comprising an inlet stage, a dispersion stage, and at least one mixing stage, the plurality of extruder screw segments forming the at least one mixing stage comprising a reverse mixing screw segment having a helical flight that traverses and forms an outer periphery thereof, the helical flight having a plurality of notches positioned therealong, a material inlet adjacent the inlet end of the elongated barrel and a first fluid inlet located within the dispersion stage for introducing a diluent. A process for extruding a polymer-diluent mixture is also provided.
摘要:
The invention relates to screw elements for multi-screw extruders with screws co-rotating in pairs and being fully self-wiping in pairs, to the use of the screw elements in multi-screw extruders and to a process for extruding plastic compositions.
摘要:
A screw element for use as a kneading element in a plasticizing unit includes at least two kneading units which can be arranged on a common axis, for example a screw shaft. The kneading units have a geometry which is designed for attaining particularly good plasticization and reduced mechanical stress in such a way that the geometry of at least two successively arranged kneading units differs.
摘要:
A method of producing a polymer-clay nanocomposite comprises providing a supply of polymer-clay mixture, exfoliating the mixture through solid-state shear pulverization in the presence of cooling sufficient to maintain the extruded mixture in the solid state during the pulverization, and discharging the resulting exfoliated mixture. The invention is also directed to a method of producing a polymer hybrid nanocomposite, wherein a component is dispersed throughout a polymer matrix by solid-state shear pulverization of a polymer mixed with the second component.
摘要:
This invention relates to methods and systems for forming composite extrudates including at least a base polymer, a plurality of fibers dispersed in the base polymer, and one or more colorants forming a visible, multi-color pattern, e.g., mimicking the appearance of natural wood.