1173results about How to "Easy extrusion" patented technology

The invention relates to a low smoke halogen-free flame retardant ethylene-propylene-diene rubber and a preparation method by extrusion molding thereof; the preparation method comprises the following steps: firstly, raw rubber matrix is evenly mixed at 80-100 DEG C by an open mill or a banbury mixer, and then cooled down to the room temperature; carbon black, modified nanometer/micrometer hydroxide, plasticizer, flame retardant synergist, vulcanization accelerator and vulcanizing agent are added in sequence according to the proportion and evenly mixed. Mixed rubber is added into a single screw extrusion machine; the temperature of a machine body, a screw and a machine head is controlled to be 50-90 DEG C; the rotating speed of the screw is within 15-40 r/min to cause that glue stock is continuously squeezed out; and hot air (175-200 DEG C) or microwave (915-2450 MHz) is adopted to cause that the glue stock is continuously vulcanized and molded. The flame retardant ethylene-propylene-diene rubber has excellent mechanical property, low smoke halogen-free flame retardant performance and good extrusion performance, and is applicable to manufacturing of flame retardant gland strips used in doors and windows for building and vehicles.

A composite wear-resisting shoe sole is prepared from, by weight, 60-100 parts of natural rubber, 10-50 parts of styrene butadiene rubber, 5-20 parts of polar rubber, 10-60 parts of modified white carbon black, 1-10 parts of zinc oxide, 1-4 parts of accelerant, 0.1-0.5 part of antioxidant, 2.5-4.5 parts of active agent, 5-20 parts of filler and 1-10 parts of sulfur .The filler is tetrapod-like zinc oxide whiskers .According to the composite wear-resisting shoe sole, the natural rubber and a small amount of polar rubber are jointly used as main rubber materials, the white carbon black subjected to toluene diisocyanate graft modification is added to serve as a reinforcing material, the tetrapod-like zinc oxide whiskers of a highly regular structure are used as a filling frame, the accelerant, the composite antioxidant and the active agent are added in sequence, and the composite wear-resisting shoe sole with high slippery resistance and tear strength and a remarkably improved frictional coefficient is prepared.

The invention provides a melt-processable conductive fluorothermoplastic composition comprising three components. The first component is at least one melt-processable, thermoplastic fluoropolymer component having its interpolymerized units derived from (i) at least 50 wt % of TFE, and (ii) one or more ethylenically-unsaturated monomers represented by the formulas (a) CF2=CF-Rf, (b) CF2=CF-O-Rf', and (c) CH2=CR2, wherein Rf is a perfluoroalkyl of 1 to 8 carbon atoms, Rf' is Rf or a perfluoroalkoxy of 1 to 8 carbon atoms, and R is selected from H, F, Cl, or an aliphatic group having from 1 to 8 carbon atoms which may have F or Cl substituents. The thermoplastic fluoropolymer component is substantially free of interpolymerized units derived from VDF. The second component is from about 0.1 to about 10 weight percent of a hydrocarbon polymer, and the third component is from about 1 to about 20 weight percent of conductive filler. The invention also provides a method for making fluorothermoplastic compositions and shaped articles comprising a conductive fluorothermoplastic composition.

An aluminum alloy containing Si: 1.5-12% (mass % here and hereinafter), Mg: 0.5-6% and, optionally, at least one of Mn: 0.5-2%, Cu: 0.15-3% and Cr: 0.04-0.35% and, further, containing Ti: 0.01-0.1% and the balance of Al and inevitable impurities, in which the average grain size of crystallized grains of Si system compounds is from 2 to 20 mu m and an area ratio thereof is from 2 to 12%. The alloy is melted to obtain a cast ingot having DAS (Dendrite Arm Spacing) of 10 to 50 mu m, which is then put to a soaking treatment at 450 to 520 DEG C. and then to extrusion molding. The aluminum alloy has excellent machinability with no addition of low melting metals.

The invention relates to a high-viscosity halogen-free flame-retardant polyamide composition which comprises the following components in parts by weight: 60-92 of polyamide, 3-20 of plasticizer, 5-20 of halogen-free flame retardant and 0.1-2 of other assistants. After the polyamide composition prepared by the invention is formed and processed, a product has good flexibility, twisting resistance and good bending property and can bear a heavier load; the product has acid resistance and friction resistance, has resistance to lubricating oil and cooling liquid and has luster at the surface; the product can bear the stress of foot tread, has no rupture and no deformation, can be quickly restored and has no any damage per se; and the appearance of the product is smooth, black and bright, and the product has no broken fragments and has uniform color. The invention can be used for the finished pieces of a corrugated pipe and the like of a high-grade automobile.

The invention discloses a transportation magnetic separation equipment for crushing and processing construction waste, which comprises a frame, a transmission box, a magnetic separation roller and a conveyor belt. The transmission box is installed on the upper end of the frame, and a conveyor frame is installed inside the transmission box , a driving roller and a magnetic separation roller are installed on the conveyor frame, and a conveyor belt is set between the driving roller and the magnetic separation roller; the upper left end of the transmission box is welded with a construction waste adding bucket, and the bottom of the construction waste adding bucket is A crushing roller is installed inside; the right end of the conveyor belt is provided with a winnowing chamber, and the bottom side of the right end of the conveyor belt is installed in sequence from left to right with an iron collection box, a heavy material box, a light material box, a slag collection box and Dust settling box; it is convenient to add construction waste into the hopper and crush it through the two crushing rollers; the magnetic separation roller absorbs and screens the construction waste containing ferromagnetism to realize the crushing and transportation of construction waste , Removal of ferromagnetism, screening, separation and dust removal, the operation is convenient and quick.

The invention relates to a nucleating agent and a method for preparing the nucleating agent, wherein the nucleating agent is used for reducing the dimension of the foaming hole and improving the density of the foaming hole when a supercritical fluid foaming agent (such as carbon dioxide or nitrogen) is used for producing thermoplastic foaming products. The raw materials of the nucleating agent mainly consists of an organic montmorillonite, a thermoplastic resin and a supercritical fluid foaming agent; the specific weight of the nucleating agent master batches is controlled within 100+/-5% of that of the thermoplastic resin. The method has the advantages that a supercritical fluid foaming method is adopted to prepare the nucleating agent master batches which have approximate specific weights to the resin material adopted by the subsequent foam forming, thus facilitating the subsequent injection foam forming and extrusion foam forming; and the carbon dioxide or nitrogen in supercritical state is used for reducing the viscosity of the carrier resin during the mixing process, the dispersion uniformity of the peeled sandwich montmorillonite in the carrier resin is reinforced, the process temperature is reduced, the layer spacing of the sandwich nano-montmorillonite which may be not peeled is increased and the sufficient peeling is realized.

The present invention is directed to three-dimensional printing techniques, methodologies, systems and apparatus to facilitate increased print speed. Through the use of multiple nozzles on a print head printing line by line, more material is deposited. By including nozzles sufficient for a line dimensional (or portion) of a page or planar element of an object design, the material deposition for an entire plane or layer is done line by line in one pass of the print head. Likewise, through the inclusion of multiple lasers, beams or energy sources more material can be cured, such as all along a contour line, instead of point by point.

The invention discloses a polyolefine sheathing compound for a coaxial cable and a preparation method thereof. The sheathing compound consists of the following components in parts by weight: 60-90 parts of ethylene-propylene-diene rubber, 5-25 parts of high-density polyethylene, 5-15 parts of functional polyolefin resin, 180-200 parts of flame retardant, 1-3 parts of surface modifier, 0.01-0.05 part of crosslinking agent, 0.5-2 parts of antioxidant and 1.5-9 parts of processing aid. The preparation method comprises the following steps of: putting the flame retardant into a high-speed stirrer for stirring at a high speed at the temperature of not lower than 80 DEG C; adding organosilane and stirring for 3-5 minutes; putting the remaining materials into the high-speed stirrer for continually stirring for 3-5 minutes; adding into a double-screw mixing extruder set by using a feeder for pelletizing; and drying. The sheathing compound has the advantages of flame retardance, low smoke, freeness from halogen, low toxicity, freeness from harmful heavy metals such as lead, cadmium and the like, freeness from phosphorus, difficulty in burning and small smog harm in case of fire, environmental friendliness, high temperature resistance level of 105 DEG C, high extruding performance, excellent electric performance, no need of subsequent crosslinking after stranding, saving in a large amount of manpower and materials and great reduction in the manufacturing period of the cable.

The invention relates to a preparation method of porous nanofiber non-woven fabric, and aims to provide a method capable of realizing large-scale preparation for porous nanofiber non-woven fabric. According to the technical scheme, the preparation method of the porous nanofiber non-woven fabric comprises the following steps in sequence: (1) stirring and dissolving polymers and a combined thinning agent uniformly in a reaction kettle at the temperature of 25-150 DEG C to prepare a polymer solution with the percent concentration of 10-60%, wherein the combined thinning agent is a mixture of a good solvent and a bad solvent, the mass ratio of the good solvent to the bad solvent is between 9: 1 and 1: 9, and the boiling point of the good solvent is lower than that of the bad solvent; (2) producing the polymer solution in the first step with melting blowing equipment to obtain primary non-woven fabric; (3) extracting and removing the combined thinning agent in the primary non-woven fabric in the second step and forming pores on fibers of the primary non-woven fabric, and drying to obtain the porous nanofiber non-woven fabric.

The invention relates to a normal-temperature dearsenic agent as well as a preparation method thereof, belonging to the technical field of dearsenic purifying. The normal-temperature dearsenic agent consists of active ingredients and auxiliaries, wherein the auxiliaries are one or more of a binder, a pore-forming agent and an extruding aid; the active ingredients comprise the following components: 40wt%-60wt% of manganese dioxide, 5wt%-15wt% of copper oxide and 5wt%-15wt% of zinc oxide; and content of the auxiliaries is 15wt%-20wt%. In the normal-temperature dearsenic agent disclosed by the invention, the manganese dioxide, the copper oxide and the zinc oxide with proper component content are matched, so that competing reaction of H2S and the copper oxide is restrained, and therefore, a using range of copper-series dearsenic agents is broadened, the copper-series dearsenic agents are enabled to be capable of being suitable for an H2S-contaning substance with arsenic to be removed, dearsenic activity of the dearsenic agent is ensured, dearsenic efficiency is improved, and cost of the dearsenic agent is lowered.

The invention discloses a prescription for preparing an energy and protein feeding stuff raw material full of omega-3 fatty acid by using rubber seeds and a method thereof. The weight percentages of the omega-3 energy and protein feeding stuff raw materials are as follows: rubber seeds 20-80%, bean pulp, corn, rapeseed cake (pulp), cottonseed cake (pulp), rice bran and wheat bran or any combination thereof 20-80%. The preparation method is as follows: the exuviated and dried rubber seeds are mixed with various ingredients evenly and puffed, and then finished product is gained. By the invention, the nutrient components such as omega-3 fatty acid, energy and protein and the like contained in the rubber seeds can be used fully, meanwhile, anti-nutritional components such as hydrocyanic acid and the like contained in the rubber seeds are removed, the energy and protein raw materials full of omega-3 fatty acid widely accepted by the feeding stuff industry and applicable to various birds, livestock and fish feeding stuff are processed. The price of the energy and protein raw material is low.

The invention belongs to the technical field of polymer materials and provides ketone group-containing polyethersulfone resin which is high in thermal stability, low in processing temperature and is easier for injection-molding and extrusion-molding. The ketone group-containing polyethersulfone resin is a product synthetized through nucleophilic polycondensation reaction of the following polymerization monomers: 4,4-dihydroxyl dihydroxydiphenylsulfone, 4,4'-dichlorobenzophenone and 4,4-dichlorodiphenyl sulfone. The ketone group is introduced onto the molecular chain of polyethersulfone, so as to improve the thermal stability of the polymer, reduce the processing temperature of the polymer and ensure that the polymer is more convenient for injection-molding and extrusion-molding. The invention also provides a synthetic method of the ketone group-containing polyethersulfone resin. The method is easy to operate, and the reaction process and the viscosity of materials are easily controlled.

The invention relates to a low-temperature fine desulfurizer and its preparation method. Raw materials for preparing the fine desulfurizer are consisting of, by weight, 40-60% of basic zinc carbonate, 15-25% of copper carbonate and at least one component selected from 0-10% of a pore forming agent, 0-10% of a binder and 5-10% of an extrusion aid. The fine desulfurizer is characterized by containing 20-30 wt% of a waste agent which can enhance catalyst strength and simplify the preparation technology. In addition, the preparation raw materials also contain 0-10 wt% of a lubricant which can raise binding performance of the materials. The method comprises the following steps of: uniformly mixing the above materials, adding 5-10 wt% of the extrusion aid, kneading for molding, and drying at 100-120 DEG C for 3-4 hours to obtain the fine desulfurizer used at low temperature. The low-temperature fine desulfurizer is applicable to fine desulphurization of industrial gases such as natural gas, oil-associated gas, refinery flares, coal gas and the like.

The invention discloses a regeneration high-density polyethylene (HDPE) particle used for tubings and a manufacture method thereof. The method comprises the following steps: firstly, drying a cross-linking agent, an antioxidant and a color masterbatch; then evenly stirring 0.1 to 2 percent of cross-linking agent, 0.1 to 1 percent of antioxidant and 0.1 to 0.2 percent of color masterbatch; then adding to the charging opening of a plastic extruder together with 96.8 to 99.7 percent of dried and recovered HDPE; then extruding materials by the extruder at the speed of 80 to 150rpm, and cutting the materials into particles by a cutting machine and then drying to obtain the regeneration HDPE particle. In the invention, the parameter of the melt index and the like of the recovered HDPE is changed by crosslinking to enable the HDPE to be beneficial to extrusion molding, and the mechanical properties of toughness, tensile strength and the like of the recovered HDPE are improved so that the regeneration HDPE particle can be used for tubing manufacture, thereby reducing the material costs of the HDPE tubes and being beneficial to the environmental protection.

A method comprising at least (a) a step of preparing a silane master batch by melt-kneading, to 100 parts by mass of a base resin (R_B) containing a non-aromatic organic oil and ethylene rubber, an organic peroxide of from 0.01 to 0.6 parts by mass, an inorganic filler of from 10 to 400 parts by mass, and a silane coupling agent of from 1 to 15.0 parts by mass, at a temperature equal to or higher than the decomposition temperature of the organic peroxide; a heat-resistant silane crosslinked resin molded body and a heat-resistant silane crosslinkable resin composition prepared by the method, and a silane master batch and a heat-resistant product.

The invention relates to a cement-based composite material suitable for making a building structure and components through a 3D printing rapid-forming process. The cement-based composite material is characterized in that an extrudable property is good, a stacking property is good, printing time is controllable, and mechanical properties and durability are excellent. Regarding detailed properties, the material has good thixotropy, controllable condensing and hardening time and good adhesion, hour strength development is rapid, and strength growth is stable at the later stage, requirements for the 3D printing process and rapid construction can be met, and actual application of the 3D printing technology in the building industry is promoted easily. The cement-based composite material includes 100 parts of ordinary Portland cement, 100-300 parts of fine aggregate, 5-20 parts of strength-promoting shrinkage reducing agent, 30-60 parts of mixing water, 0.1-2.0 parts of water reducing agent, 0.5-15 parts of interface reinforcing agent, 0.05-0.2 part of thixotropic agent and 0.5-3.5 parts of liquid coagulating components.