摘要:
The invention relates to a method for the production of a polyamide based on dicarboxylic acids and diamines, wherein a solid mixture is heated in an extruder, the mixture containing a monomer mixture of 50 mol-% of a dicarboxylic acid mixture of 60 to 88 wt.-% of terephthalic acid and 12 to 40 wt.-% isophthalic acid, in which up to 20 wt.-% of the dicarboxylic acid mixture may also be replaced by other dicarboxylic acids, and 50 mol-% of hexamethylene diamine, up to 20 wt.-% of which may be replaced by other C2-30 diamines, using a synchronized twin screw extruder for a dwell time of 10 seconds to 30 minutes to a temperature in the range from 150 to 400°C while removing water vapor, and possibly diamines, through degassing openings.
摘要:
Die Erfindung betrifft eine Kunststoffverarbeitungsmaschine, die mindestens einen Zylinder und eine Schnecke umfasst, deren Drehzahl veränderbar ist, wobei das Schneckenprofil derart ausgelegt ist, dass diese ein annähernd adiabates Verhalten aufweist. Erfindungsgemäß ist vorgesehen, dass die Ausstoßleistung über die Drehzahl bestimmbar ist.
摘要:
An extruded composite utilized as a building material includes a base polymer, unseparated processed recycled carpet waste, and a filler material, which may be a wood filler or other natural fiber. Carpet waste may be separated into components that may be utilized in a variety of plastics applications, including extruded composites utilized as building materials. Separation may include shaving face fiber (402) from bound fiber (406) secured in a backing fiber (408) and/or may include separating fiber pile and backing fibers from carpet adhesive (410) to remove inorganic materials such as calcium carbonate.
摘要:
The invention provides a method of manufacturing polyolefin-polyamide resin composition, which method has a large amount of discharge and is capable of long-time running and excellent in productivity. The method of manufacturing polyolefin-polyamide resin compositions comprises melting and kneading, extruding, and drafted drawing or rolling (a) a polyolefin, (b) a polyamide, (c) a silane coupling agent, (d) a first antioxidant with a melting point of 70-170 °C, and (e) a second antioxidant with a melting point of 180-300 °C to disperse the polyamide (b) in the form of fiber with an average fiber diameter of 1 µm or less in the polyolefin (a) to finish the composition in the form of pellets.
摘要:
The degree of kneading of a material to be kneaded is to be capable of being adjusted with a high accuracy. A kneading degree adjusting mechanism is installed in a processing apparatus having a barrel and a kneading screw inserted into the barrel rotatably, the kneading screw having a kneading section and being adapted to rotate within the barrel to knead a material continuously while feeding the material from an upstream side toward a downstream side, the kneading degree adjusting mechanism including a push-back section for pushing back the material to the upstream side and thereby making the material stay around the kneading section, the push-back section being disposed downstream of the kneading section in the kneading screw, a kneading degree adjusting member having an opposed surface opposed to an outer periphery surface of the push-back section, and a drive section for actuating the kneading degree adjusting member so that the opposed surface moves toward and away from the push-back section.
摘要:
The invention relates to a method for the production of a polyamide based on dicarboxylic acids and diamines, wherein a solid mixture is heated in an extruder, the mixture containing a monomer mixture of 50 mol-% of a dicarboxylic acid mixture of 60 to 88 wt.-% of terephthalic acid and 12 to 40 wt.-% isophthalic acid, in which up to 20 wt.-% of the dicarboxylic acid mixture may also be replaced by other dicarboxylic acids, and 50 mol-% of hexamethylene diamine, up to 20 wt.-% of which may be replaced by other C2-30 diamines, using a synchronized twin screw extruder for a dwell time of 10 seconds to 30 minutes to a temperature in the range from 150 to 400°C while removing water vapor, and possibly diamines, through degassing openings.
摘要:
Heizkörper (20) für Durchflussmedien, insbesondere für extrudierbare Werkstoffe, der durch heissisostatisches Pressen gefertigt werden kann, mit einer Kanalwandung (30). Weiterhin betrifft die Erfindung die Verwendung eines derartigen Heizkörpers (20)und einen Extruder sowie ein Verfahren zur pulvermetallurgischen Herstellung eines derartigen Heizkörpers. Um eine schnellere, einfachere und besser kontrollierbare Aufheizung und Beheizung des Heizkörpers (20) zu ermöglichen, wird vorgeschlagen, dass in die Kanalwandung (30) eine elektrische Heizleitung (1) mit einem Heizdraht (5) und einem Isolationsmantel (6) für diesen implementiert ist, wobei der Isolationsmantel (6) aus einem wärme- und druckstabilen Material besteht, welches gegenüber den Herstellungsbedingungen resistent ist.
摘要:
A pump system (10) comprising a delivery assembly (22) configured to feed a solid material under operational power of a first drive motor (16), and a screw pump (24) comprising a housing (84) that at least partially defines a barrel (106) of the screw pump (10), an extrusion tip (82) secured to the housing (84) at a first end of the barrel (106), a liquefier (85, 342) secured to the housing (84) and intersecting with the barrel (106), and an impeller (94) extending at least partially through the barrel (106). The liquefier (85, 342) is configured to receive the solid material fed from the delivery assembly (22), to at least partially melt the received solid material, and to direct the at least partially melted material to the barrel (106), and the impeller (94) is configured to drive the at least partially melted material that is directed to the barrel (106) toward the extrusion tip (82) under operational power of a second drive motor (18).
摘要:
An object is to reduce the axial dimension of an injection apparatus, melt a molding material uniformly, and improve the quality of molded products. A screw (20) comprises a plasticizing portion which comprises a body portion (45a) and a flight (53) projectingly formed on an outer circumferential surface of the body portion (45a). A groove-depth setting region is defined over a predetermined section of the plasticizing portion, and in the groove-depth setting region, the ratio γ1 of a groove depth τ1 to a diameter δ1 of pellets of a molding material falls within the range of 1 ≤ γ1 ≤ 1.5 where the groove depth τ1 is a depth of a groove (67) formed along the flight (53). In the groove (67), pellets are arranged laterally and caused to advance while rolling along the groove (67). Since the pellets do not aggregate, no solid bed is formed.