8results about How to "Uniform plasticization" patented technology

The invention discloses a double-sided composite ultrahigh-viscosity self-adhesive film, a production process and equipment, the self-adhesive film comprises a base material layer and an adhesive layer, and the base material layer comprises a surface layer, a middle layer and a bottom layer; the formula of the surface layer comprises 90% of LDPE (Low-Density Polyethylene) and 10% of Exfin; the Exfin is a three-well chemical'silicon-like polyolefin copolymerization master batch '; the formula of the middle layer comprises 70% of LLDPE, 20% of LDPE and 10% of rim charge; and the formula of the bottom layer comprises 95% of LDPE and 5% of SEBS. And the formula of the adhesive layer comprises the following components: 30 parts of SEBS, 40-60 parts of tackifying resin, 10-20 parts of white oil, 1 part of fumed silica and 0.5 part of antioxidant 1010. According to the production process, casting co-extrusion is combined with a coating system, multi-layer materials with great difference can be stably subjected to interlayer melting convergence to form the ultrahigh-viscosity protective film at a time, and the production efficiency is greatly improved.

The invention relates to the technical field of extruders, and provides an extruder screw charging barrel waste heat recovery device which is used for recycling heat generated by a screw charging barrel and comprises a heat conduction pipe, the heat conduction pipe is wound on the screw charging barrel, and a heat exchange medium is arranged in the heat conduction pipe; the preheating barrel is used for preheating raw materials; the preheating barrel is sleeved with the preheating interlayer, a first flowing cavity is formed between the preheating interlayer and the preheating barrel, and the heat conduction pipe communicates with the first flowing cavity. By means of the technical scheme, the problems that in the prior art, a large amount of heat is generated in the machining process of an extruder screw charging barrel, but the heat is not recycled are solved.

The invention relates to the technical field of high polymer materials, in particular to a preparation method of a chlorinated polyvinyl chloride modified material, which is prepared by chlorination of polyvinyl chloride by a chemical grafting method, block of 2-ethylhexyl acrylate and grafting of dodecenyl succinic anhydride. Net-shaped cross-linked block chlorinated polyvinyl chloride prepared by cross-linking acrylonitrile fibers and poly-alpha-methyl styrene through a physical blending method is used, and long-chain fatty acid ester containing active proton pellet groups is grafted on chlorinated paraffin to serve as a main stabilizer. The molecular structure of the obtained chlorinated polyvinyl chloride modified material is more excellent, and the strength, the thermal stability and the heat resistance of the chlorinated polyvinyl chloride modified material are greatly improved; the impact-resistant chlorinated polyvinyl chloride improves the self-defect of poor impact resistance of chlorinated polyvinyl chloride, obviously improves the plasticity, widens the application range, and is especially suitable for preparation of heat-resistant and impact-resistant high polymer material products.

The invention relates to rubber processing equipment, in particular to a screw structure of a rubber cold feed extruder. Comprising a feeding section, a plasticizing section connected with the feeding section and an extruding section connected with the plasticizing section, the plasticizing section comprises a plurality of shearing sections and mixing sections, the number of the mixing sections is the same as that of the shearing sections, and the shearing sections and the mixing sections are alternately distributed; two main screw flights are arranged on the mixing section, the two main screw flights are spirally arranged along the peripheral side of the mixing section, starting points of the two main screw flights are different, but screw pitches of the two main screw flights are the same, and a main screw groove is formed between the two main screw flights; the width of the widest part of the main screw flight is 1.3-2 times of the width of the screw flight of the shearing section, the depth of the main screw flight is 55-65% of the depth of the screw flight of the shearing section, and the helical angle of the main screw flight is the same as that of the screw flight of the shearing section. According to the invention, through continuous shunting-shearing-converging, the rubber material is fast in heat generation and more uniform in the plasticizing process, the quality of the rubber material is improved, and the energy consumption is low.

The utility model discloses an injection molding machine material cylinder subassembly, include: fixed cylinder, the top of fixed cylinder is installed with fixed plate, the bottom fixed connection of fixed cylinder has the taper groove, the left side upper end of fixed cylinder inserts and is established with the feed pipe, the bottom fixed connection of taper groove has the connecting pipe, the bottom fixed connection of connecting pipe has the connecting disc, even feeding mechanism, the middle installation of fixed plate has even feeding mechanism, the bottom fixed connection of even feeding mechanism has the connecting rod, the inner chamber middle installation of fixed cylinder has the mounting panel, through even feeding mechanism, it is convenient to make plastic granule even through the leakage hole on the mounting panel and carry out the discharge use of material, and the rotation of rotating shaft is in rotation simultaneously, drives the spiral blade on connecting rod and rotates, makes the plastic granule that even enters the connecting pipe even delivery into injection molding machine, ensures that plastic granule plasticizes evenly, avoids causing feed blockage, has improved the stability of this device use.

The utility model discloses a chemical fiber friction material production device in the field of chemical fiber friction materials, which comprises a transversely arranged double-screw extruder, a feeding port is arranged on the upper side of the double-screw extruder, a discharging port is arranged at the rear end of the double-screw extruder, a belt conveyor is arranged corresponding to the discharging port of the double-screw extruder, and a belt is arranged on the belt conveyor. The belt conveyor is obliquely arranged, a hopper is arranged corresponding to the discharging end of the belt conveyor, a ton bag is arranged below the hopper, the ton bag is arranged on a placing seat, the placing seat comprises a rectangular base plate, side baffles are vertically arranged on the left side and the right side of the upper surface of the base plate, the side baffles are transversely arranged, and a front baffle is vertically arranged on the front side of the upper surface of the base plate. The front baffle is longitudinally arranged, and the placing base is arranged on the weighing platform. The floor area of friction material production equipment can be reduced, the production process is simplified and more environment-friendly, and products are more convenient to weigh and pack during shipment.

The invention relates to the field of auxiliary chemicals, in particular to the field of C08L2201 / 08, and particularly relates to an environment-friendly stabilizer for PVC (polyvinyl chloride) and a preparation method of the environment-friendly stabilizer. The environment-friendly stabilizer for PVC is prepared from the following raw materials: stearate, a lubricant, hydrotalcite, an antioxidant, a coupling agent, an auxiliary stabilizer and a filler. Wherein the hydrotalcite comprises CZ-380 and CZ-390, and the lubricant comprises oxidized wax and Fischer-Tropsch wax. The prepared environment-friendly stabilizer for PVC can significantly improve the weather resistance, temperature resistance and glossiness of a PVC product, and the actual use effect is excellent.

The present invention belongs to the technical field of special materials for PE pipes, and specifically relates to an ultra-large-caliber PE pipe material and its preparation method and application. The present invention first provides a modified whisker carbon nanotube masterbatch, wherein the whisker carbon nanotube is grafted with a phase change microsphere having a phenolic resin as a shell and n-hexadecane as a phase change core material, and the masterbatch is mixed with PE resin and kneaded to form a masterbatch, and then further made into an ultra-large-caliber PE pipe material with PE resin and carbon black masterbatch. The obtained ultra-large-caliber PE pipe material has good tensile fracture rate and anti-aging performance, and other properties also meet the relevant standard requirements of PE pipes.