An extruder configured to extrude a solid raw material containing moisture includes a barrel, a hopper coupled to one side of the barrel, a discharge port, a screw, vent disposed between the hopper and the discharge port to discharge vapor generated within the barrel; and a heater mounted on the barrel to heat the raw material. Raw material introduced into the barrel through the hopper is heated by the heater while being transferred within the barrel through the screw. A kneading zone, in which raw materials transferred by the screw threads are compressed, is formed on the screw. Since the raw material is melted within the barrel, a heating temperature of the heater and an axial rotation speed of the screw are controlled so that a sealing membrane that shields an inner transverse section of the barrel is formed from the liquid raw material in the kneading zone.

A method for producing thermally crosslinkable polymers in a planetary roller extruder is presented. The planetary roller extruder has a filling part and a compounding part made of a roller cylinder region that comprises at least two, preferably at least three coupled roller cylinders, planetary spindles of which are driven by a common central spindle. The polymers are supplied in a plasticized state. The filling part is supplied with a vacuum. The flow temperatures of the central spindle and the at least two roller cylinders under a vacuum are set such that the polymers to be degassed remain in the plasticized state. One or more liquids, such as thermal crosslinkers, crosslinking accelerators, dye solutions, or dye dispersions, are metered to the plasticized polymers downstream of the vacuum degassing, preferably in a continuous manner. Finally, the resulting mixture is directly supplied to a coating assembly.

Disclosed herein are new injection molding-coating devices for the continuous manufacturing of coated pharmaceutical tablets comprising one or more active pharmaceutical ingredients and one or more excipients. Also disclosed herein are methods for the continuous manufacture of coated pharmaceutical tablets using these new devices for the purpose application in the pharmaceutical and drug manufacturing industries.

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.

The present invention discloses a precise extrusion and transfer apparatus for light guide plate production, including: a feed hopper; a dehumidifying and drying device; a screw conveyor fixedly mounted on one side of the outer wall of the dehumidifying and drying device; a screw extrusion device; and a molding box fixedly mounted with first motors and a second motor on one side of the outer wall by means of bolts, where power output ends of two sets of first motors pass through the molding box and are fixedly mounted with first precise roller bearings by means of rotating shafts, and a power output end of the second motor passes through the molding box and is fixedly mounted with a second precise roller bearing by means of a rotating shaft. According to the present invention, one-step molding from a particle base material to a finished light guide film is implemented, the problem of warpage is overcome, the production efficiency is improved, and the production cycle can be shortened to 1 s; and the product is thinner and can be as thin as 80 μm, the production costs such as material consumption and labor are greatly reduced, key indicators of the product such as brightness and light transmittance of the light guide film are comprehensively improved, and the advantages in quality and costs are enabled in fierce market competition.

A resin composition suitable for profile extrusion processing is provided. Based on the total weight of the resin composition, the resin composition includes 40 wt. % to 92.1 wt. % of polyester; 2 wt. % to 15 wt. % of modifier, 0.2 wt. % to 1.5 wt. % of tackifier, and 0.1 wt. % to 40 wt. % of filler.

An extrusion cylinder has a cylinder body for accommodating an extruder worm and is characterized in that an outer wall of the cylinder body has at least one depression which can be covered and which in the covered state is suitable for conducting a cooling or heating medium for controlling the temperature of the cylinder body.

The present invention relates to a polymer composition comprising (A) from 60 to 90 wt % of a non-elastomeric polyethylene; (B) from 9.0 to 38 wt % of an elastomer; wherein onto component (A) or components (A) and (B) an acid grafting agent (C) has been grafted in an amount of from 0.01 to 3.0 wt %, all based on the total weight of the polymer composition, and wherein the polymer composition has two distinct peaks and a valley between said peaks in the GPC curve and a Z value, determined from the areas below the two peaks of the GPC curve, of at least −0.3, wherein the Z-value is determined according to formula (I) Z=s/Abs(B−A) (I) wherein Abs(B−A) is the absolute value of (B−A); A=the area, between the tangent parallel to the MW axis going through log M (Min) and the LS15 signal, from log M of 5.1 to log M value where the LS signal is minimum log M (Min), in the log M range between 5.1 and 6; B=the area, between the tangent parallel to the MW axis going through log M (Min) and the LS 15 signal, from log M(Min) to the point where the LS signal is crossed again; and s is the slope between the two peaks of the GPC curve, defined at log M of 5.1 and 6, wherein the GPC curve is defined as the concentration normalized LS 15 signal along the molecular weight of conventional GPC, obtained from the GPC-VISC-LS analysis, a multi-layer structure such as a coated metal pipe, comprising one layer comprising said polymer composition and the use of said polymer composition as adhesive polymer composition and for the production of a multi-layer structure.

The present disclosure provides processes for producing polyethylene resins. In at least one embodiment, a polyethylene has: a density of from about 0.91 g/cm.sup.3 to about 0.94 g/cm.sup.3; a value of Mz of about 1,500,000 g/mol or greater; and a ratio of Mz to Mw of about 7 or greater. A process includes introducing a first feed stream having ethylene monomer and a first free radical initiator to a first inlet of a first reaction zone, where the first reaction zone has a first inlet temperature. The process further includes introducing a second feed stream having ethylene monomer and a second free radical initiator to a second inlet of a second reaction zone, where the second reaction zone has a second inlet temperature that is the same or different than the first inlet temperature.

Described herein is a liquid injector for a barrel extruder as well as methods and processes of manufacturing irradiation crosslinked polypropylene foam. In some embodiments, this includes a liquid injection barrel element that is incorporated in an extruder barrel that includes at least one injection port, a temperature sensor well, and cooling channels.