The invention relates to a screw extruder (29) having a housing (30) comprising an intake housing (4), a degassing housing (5), and at least one housing bore (21, 22) running in the interior of the degassing housing (5) and implementing at least one internal wall segment (25; 26; 27; 28) of the degassing housing (5) and serving for receiving at least one auger shaft (7), and wherein the at least one wall segment (25; 26; 27; 28) of the at least one housing bore (21, 22) comprises at least one partition wall (13, 33) protruding into the at least one housing bore (21, 22) in the region of the degassing housing (5), and wherein at least one filter element (8) is disposed in the interior of the degassing housing (5) and at least partially encompasses the at least one auger shaft (7) and bears on the partition wall (13) in regions for implementing at least two spatial pressure regions (11, 12) sealed off from each other.

Improvements in the extrusion of thermohardenable materials are achieved by cooling the material in the initial zone of the extruder and reducing residence time by use of a prescribed length to diameter ratio and screw speed, particularly useful for intermittent application during robotically controlled mass production.

A modular plastic pipe formation apparatus, wherein at least two components of the pipe formation apparatus are disposed with respect to at least one or more respective modules.

A processing system for bulk material comprises a processing device for the bulk material, at least one bulk material storage container for storing the bulk material, a bulk material dosing device connected to the at least one bulk material storage container for dosed discharge of the bulk material from the bulk material storage container, a bulk material downcomer connected to the bulk material dosing device for conveying the bulk material into the processing device, at least one additive feed for feeding an additive, an additive dosing device connected to the at least one additive feed for dosed discharge of the additive from the additive feed, and an additive downcomer connected to the additive dosing device for conveying the additive into the processing device, wherein the bulk material downcomer directly connects the bulk material dosing device to the processing device.

[Problem] To provide: a biaxially oriented polyester film that exhibits excellent transparency, enables easy secondary processing such as coating and vapor deposition, provides excellent post-secondary-processing properties, and is environmentally friendly in that the film is made from polyester resins recycled from the market and society, including those from PET bottles; and a production method for such a film. [Solution] A biaxially oriented polyester film comprising a polyester resin composition containing particles and polyester resins recycled from the market and society, including those from PET bottles, the film having at least one surface that satisfies all requirements (1)-(3). (1) The number of fine projections having a height less than 3 nm per an area of 4×10-12m2 is 250-600. (2) The number of fine projections having a height not less than 3 nm per an area of 4×10-12m2 is 300-600. (3) The arithmetic average height Sa is 0.01-0.025 μm.

A process is disclosed for combining a polysaccharide ester polymer with one or more plasticizers in a way that produces a homogeneous blend. The polysaccharide ester polymer can be in the form of particles and fed to a heated extruding device. Separate quantities of plasticizer can then be combined with the polysaccharide ester polymer particles as they are conveyed through the extruding device. Through the process of the present disclosure, a homogenous blended product can be formed that can then be used to form various articles including fibers, films, and molded articles.

The present invention relates to a processing technology for manufacturing seepage irrigation pipe with alternating effluent sections and non-effluent sections, and in particular, to the field of underground seepage irrigation in agriculture and forestry. The processing technology combines the production unit for water-effluent pipes with the production unit for non-effluent pipes, and produces the seepage irrigation pipeline by adjusting the raw material ratios, controlling the spindle speed, spindle acceleration time, and spindle deceleration time of the two pipeline production units, to generate a seepage irrigation pipe with alternating effluent sections and non-effluent sections. The lengths of the effluent sections and non-effluent sections can be adjusted, the pipe wall thickness can also be adjusted by adjusting the inner and outer diameter of the internal mold of the pipe forming unit, a seepage irrigation pipe with alternating effluent sections and non-effluent sections is environment-friendly, efficient, water-saving, and useful for underground irrigation.

The present invention aims to provide a heat-shrinkable polyester film roll having decreased generation of wrinkles or longitudinal shrink mark. The present invention provides a film roll of a heat shrinkable polyester film, wherein a polyester of the polyester film contains recycled raw material from a PET bottle and an acid component of the polyester comprises isophthalic acid, and the film roll satisfies a specific average value of a shrinkage, specific isophthalic acid ratio, and specific thickness unevenness.

The present invention discloses an LCP film production apparatus and method. The apparatus includes: a rack; a screw extrusion device; a T-shaped material port; a squeezing assembly, where the squeezing assembly includes a first roller wheel, a second roller wheel, and a third roller wheel, the first roller wheel and the second roller wheel are fixedly mounted directly below the T-shaped material port side by side, and the third roller wheel is fixedly mounted next to the second roller wheel side by side; and an electromagnetic field generator, fixedly connected to the T-shaped material port and mounted around the T-shaped material port in a circle by means of bolts, where the screw extrusion device is fixedly mounted at the top of the rack, and the T-shaped material port is fixedly mounted on one end of the screw extrusion device. According to the present invention, a field generated by the electromagnetic field generator can disrupt the ordered arrangement of LCP molecules, thereby alleviating or even eliminating the anisotropic problem of transverse and longitudinal tensile strength thereof.

The present invention relates to: a polyolefin-based resin foam including a polyolefin-based resin and a conductive filler containing carbon nanotubes and carbon black, wherein the weight ratio of the carbon nanotubes to the carbon black is about 1:1.5 to about 1:5; and a molded product produced therefrom. The polyolefin-based resin foam according to the present invention includes the carbon nanotubes and the carbon black in an appropriate ratio, and thus a molded product having good bondability and exhibiting low surface resistance and surface resistance deviation can be produced by molding the same.