35results about How to "Little impact on liquidity" patented technology

The invention discloses a halogen-free flame-retardant type injection molding-class polyolefin wood plastic composite material and a preparation method thereof. The composite material consists of the following components in percentage by mass: 25 to 80 percent of polyolefin resin, 5 to 60 percent of plant fiber, 0.5 to 20 percent of compatilizer, 0 to 30 percent of flexibilizer, 0.5 to 8 percent of dispersant, 5 to 40 percent of flame retardant and flame retardance synergist and 0 to 1 percent of antioxidant. Compared with the conventional wood plastic composite material, the halogen-free flame-retardant type injection molding-class polyolefin wood plastic composite material has the characteristics of simple production flow, little using amount of the flame retardant, good halogen-free flame retardant effect, wide range of molding modes and the like and is applicable to various injection molding products, such as electric appliance shells, automobile parts, furniture, buildings and other parts.

The invention discloses a styrene series non-halogen flame retardant injection-grade wood plastic composite and a preparation method thereof. The styrene series non-halogen flame retardant injection-grade wood plastic composite is prepared from the following components in percentage by mass: 25-60 percent of styrene series resin, 5-60 percent of plant fiber, 0.5-20 percent of compatilizer, 0-30 percent of flexibilizer, 0.5-8 percent of dispersing agent, 5-40 percent of fire retardant and synergetic fire retardant and 0-1 percent of antioxidant. Compared with the traditional wood plastic composite, the styrene series non-halogen flame retardant injection-grade wood plastic composite prepared by the invention has the characteristics of simple production flow, less consumption amount of fireretardant, good non-halogen flame retardant effect, wide range of moulding ways, and the like, and is suitable for various injection moulded parts such as shells of electric appliances, parts for vehicles, and parts for furniture and buildings, and the like.

The invention relates to a large casting-molding self-combined silicon carbide product. The method comprises the following steps: taking silicon carbon particulates and fine powder, silicon carbon powder, silica powder, silicon powder, carbon black, molybdenum disilicide micro powder, active magnesium oxide and a water reducer as powder; by taking ludox as a binding agent, molding by adopting a vibrating casting manner; sintering the molded green body under a protective atmosphere after conserving and baking, wherein the highest sintering temperature is 1300-1500 DEG C; sintering and cooling to room temperature along with a furnace, so as to prepare the self-combined silicon carbide product. The large and profile self-combined silicon carbide product can be prepared, and has the advantages that the size and the shape of the product are not limited, performance is excellent, and the like, and the prepared self-combined silicon carbide product can be applied to the fields such as a blast-furnace tuyere and a cooling wall tile in the iron and steel industry and an aluminum electrolytic cell in the non-ferrous industry.

The invention provides a heat-resistant cast magnesium alloy, which belongs to the technical field of metal material and comprises the following compositions in percentage by weight: 1.5 to 4.5 percent of yttrium, 0.4 to 1.5 percent of zinc, 0.2 to 0.7 percent of zirconium, impurity elements: less than 0.005 percent of ferrite, less than 0.015 percent of copper and less than 0.002 percent of nickel and the balance of magnesium. The heat-resistant cast magnesium alloy is low in cost and high in efficiency, has good tensile strength, yield strength and elongation, and meanwhile has perfect creep resistance property and good casting property.

The invention belongs to energy absorption accessories of thin-walled tubes in anti-collision structures of vehicles, and particularly relates to a direct-plug type energy absorption assembly of a thin-walled tube. The direct-plug type energy absorption assembly of the thin-walled tube comprises four energy absorption elements and fixing elements. Each energy absorption element is a multilayer composite round tube, and tube wall materials of adjacent layers of each multilayer composite round tube are mutually orthogonal. The two ends of each energy absorption element are fixed to the fixing elements, the other side of each fixing element is provided with a petal-shaped opening, and the energy absorption elements and the fixing elements are mounted in the thin-walled tube. Through the direct-plug type energy absorption assembly of the thin-walled tube, the bearing capacity and the specific energy absorption rate of unit mass of the thin-walled tube are increased, a load uniformity coefficient is reduced, local buckling and damage are reduced, and plastic deformation is evenly distributed on more sections. Meanwhile, the direct-plug type energy absorption assembly of the thin-walled tube is stable, reliable and capable of coping with normal loads of different portions and directions, and external shock kinetic energy can be irreversibly dissipated through plastic deformation in a stable damage mode and in an adjustable way.

The invention belongs to the technical field of chlorine ion curing agents, and especially relates to a chlorine ion curing agent for sea sand and a preparation method and applications thereof. The curing agent comprises following raw materials in parts by weight: 20 to 40 parts of CaFe-NO3 LDHs nano sheet, 20 to 40 parts of CaFeAl-NO3 LDHs nano sheet, 20 to 30 parts of alkaline anion exchange resin, and 5 to 10 parts of polyvinylpyrrolidone, wherein the CaFe-NO3 LDHs nano sheet and the CaFeAl-NO3 LDHs nano sheet are metal dihydroxide with a layered structure. The chlorine ion curing agent isa composite of organic substances and inorganic substances, the addition amount is little, the chlorine ion curing effect is prominent, and the mechanical properties, anti-corrosion performance, and impervious property of a cement based material are obviously enhanced at the same time.

The invention discloses a super-tough and brake fluid-resistant ASB/PBT alloy material and a preparation method thereof. The alloy material contains the following components in percentage by weight: 45wt%-66wt% of ABS resin, 30wt%-40wt% of PBT resin, 1wt%-4wt% of a compatilizer, 0-2wt% of a compatilizer synergist, 2wt%-8wt% of a flexibilizer and 0.6wt%-1.8wt% of other aids. By virtue of PMMA-cooperated SAG compatibilization, the interfacial strength of the alloy is enhanced, the shock resistance of the material is increased, and the use amount of the compatilizer is decreased; by utilizing EBA as the flexibilizer, the shock resistance of the material is increased, and meanwhile, the liquidity of the material is improved; and by adjusting the proportion of the flexibilizer so as to adjust the fusion index of the alloy material, the alloy material can meet different processing conditions of injection molding of a battery shell. The obtained ASB/PBT alloy material simultaneously has the characteristics of ABS and PBT and further has the characteristics of high shock resistance, excellent brake fluid resistance, stable dimension, adjustable liquidity and the like, and the comprehensive performance of the ASB/PBT is improved. A processing process comprises the steps of mixing, fusion extrusion, granulation, drying and the like. A preparation process is simple and suitable for being applied to batch production.

The invention relates to the field of synthesis of a nylon elastomer and discloses an ageing-resistant nylon elastomer and a preparation method thereof. The ageing-resistant nylon elastomer comprises5 to 15 percent of polyether prepolymer, 5 to 15 percent of polyester prepolymer, 45 to 55 percent of caprolactam, 0.5 to 1.5 percent of inorganic acid catalyst, 5 to 10 percent of binary acid, 5 to 10 percent of diamine, 0.01 to 0.05 percent of organic acid catalyst, 3 to 5 percent of aspartic acid-proline-glutamic acid nanoparticles loaded with a chain extender, 0.01 to 0.5 percent of antioxidant, 0.01 to 0.5 percent of ultraviolet-resistant agent and the balance of water. By the method, a functional aid is added in advance during polyamide polymerization, the functional aid and a polyamidematrix have high compatibility, influence on the flowability of melt is small, the requirement of setting process parameters in the melt extrusion process is loose, and the controllability is high.

The invention relates to a flame-retardant polypropylene barrier explosion-proof material. The material is of a porous reticular structure and can divide a space into a plurality of small units; and the material is prepared from, by weight, 70-80 parts of polypropylene, 20-30 parts of a halogen-free composite flame retardant, 5-10 parts of a compatibilizer, 1-3 parts of a synergist and 1-2 parts of an antistatic agent. The barrier explosion-proof material can be customized into matched specifications according to the shape of a gas pipeline, and is of the porous structure, and the space of thestructure is divided into the plurality of small units. The barrier explosion-proof material provided by the invention belongs to a nonmetallic material, has flame retardant property, has the advantages of oxidation resistance, low possibility of deformation, high strength and low cost compared with a reticular aluminum alloy material, is filled in a gas transmission pipeline, has less influenceon the liquidity of gas, and has good barrier explosion-proof effect.

The invention discloses a high-flowability and high-toughness PC/PET (polycarbonate/polyethylene terephthalate) composite. The high-flowability and high-toughness PC/PET composite is prepared from PCresin, PET resin, a toughening agent, a flame retardant, an antioxidant and other aids, wherein the toughening agent is a styrene-butadiene-glycidyl methacrylate terpolymer and contains 30wt.%-40wt.%of styrene, 55wt.%-65wt.% of butadiene and 0.1wt.%-1.0wt.% of glycidyl methacrylate and has the mass average molecular weight being 18,000-25,000. On the premise that no compatibilizer or chain extender is used in the composite, the toughening agent with the special structure is selected, has very high toughening efficiency and has very small influence on the flowability of the composite, the thermal stability of the composite is improved, and the mechanical property of the composite is guaranteed. The flowability, toughness and thermal stability of the composite are greatly optimized, and thecomposite is particularly applicable to occasions with higher requirements for the flowability and the use environments.

The invention relates to the field of plastic synthesis, and discloses a high-temperature-resistant polyamide plastic and a preparation method thereof. The polyamide plastic is prepared from 90 to 110parts of caprolactam, 1 to 3 parts of inorganic acid catalysts, 3 to 5 parts of binary acid, 4 to 6 parts of aspartic acid-proline-glutamic acid copolymer nanoparticles loaded with chain extenders, 0.01 to 0.5 part of heat stabilizers, 0.01 to 05 part of antioxidants and 10 to 50 parts of water. The method has the advantages that during the polymerization of polyamide, functional auxiliary agentsare added in advance; the functional auxiliary agents have good compatibility with the polyamide base body; the influence on the flowability of melt is small; the setting requirement on the process parameters of the molten extrusion process is relatively loose; the controllability is strong.

The invention relates to the field of film preparation and discloses a flame-retardant anti-dripping polyamide sheet preparation method which comprises the following steps: A) pretreating: utilizing asilane coupling agent to pretreat magnesium hydroxide crystal whisker, aluminum borate crystal whisker and calcium carbonate crystal whisker; B) polymerizing: evenly mixing caprolactam, an inorganicacid catalyst, binary acid, the magnesium hydroxide crystal whisker, the aluminum borate crystal whisker, the calcium carbonate crystal whisker, aspartic acid-proline-glutamic acid copolymer nanoparticle loaded with a chain extender and water and heating and reacting to prepare polyamide slices; C) stretching: heating and fusing the polyamide slices, then longitudinally and horizontally stretchingand heat setting the heated and fused polyamide slices to prepare polyamide sheets. According to the method disclosed by the invention, a functional aid is added in advance when polyamide is polymerized, fusion time of the functional aid and a polyamide matrix is long, and compatibility is better; thus, an effect on melt fluidity is smaller, a technological parameter setting requirement in a fusing and stretching process is looser, and controllability is strong.

The invention provides a nano whisker modified epoxy resin composition. The composition comprises the following components in parts by weight: 2-25 parts of epoxy resin A; 2-25 parts of a curing agent B; 0-15 parts of nano crystal whisker C; 0.01-3 part of an accelerant D; 15-89 parts of an inorganic filler E; 0-25 parts of a flame retardant F; 0.05-3 part of a release agent G; 0.01-3 part of a coupling agent H; 0-3 parts of a modifier I. The composition has the following technical effects: 1) compared with a material without nano whisker, the strength is obviously improved; the composition is especially suitable for electronic packaging, and can also be used for packaging some small electrical appliances or manufacturing structural members. 2) More than 5% of nano whiskers are added in the embodiment of the common epoxy molding compound, the system fluidity is greatly reduced, and the spiral flow length is reduced by more than 20cm and the actual availability of the formula is reduced, the defect is avoided through the technical means, the overall spiral flow length is generally more than 30cm, and the overall spiral flow length of the low-stress product can be more than 80cm.

The invention discloses a reinforced gypsum board as well as a production system and a production method thereof. The reinforced gypsum board comprises upper surface protection paper, lower surface protection paper and at least two fiber layers arranged between the upper surface protection paper and the lower surface protection paper; every two adjacent fiber layers are connected through vertical yarns to form a three-dimensional fiber structure; and the three-dimensional fiber structure is filled with a plate core.

The invention discloses an underwater moving device and a fishpond water environment monitoring robot, and belongs to the technical field of agriculture, and the underwater moving device comprises a waterproof bin, a rotating seat, two horizontal propellers and at least two vertical propellers. The rotating seat is rotationally connected with the waterproof bin, the two horizontal propellers are symmetrically arranged along the gravity center of the rotating seat, and the at least two vertical propellers are uniformly arranged around the gravity center of the rotating seat. The detection assembly of the underwater moving device disclosed by the invention does not generate large-amplitude swing; in addition, the rotating seat is only of a small structure on the underwater moving device, the influence of rotation of the rotating seat on the flowability of water is relatively small, and therefore the accuracy of the detection result of the detection assembly is improved. The underwater moving device disclosed by the invention is mainly used for monitoring the water quality in the pond and monitoring parameters such as the oxygen content, the PH value and the temperature of the pond water so as to judge whether the water quality in the pond is suitable for fish growth or not.

The invention discloses a single-row flue gas waste heat recovery device which comprises a shell, wherein more than two gas-liquid heat exchangers are arranged in the shell; each of the gas-liquid heat exchangers which are arranged in a row comprises a front baffle plate, a back baffle plate and more than two plates, wherein a water inlet pipe and a water outlet pipe are arranged on the front baffle plate; the plates are arranged between the front baffle plate and the back baffle plate, salient points are arranged on the plates, two plates form a group, the salient points on each group of theplates are arranged oppositely, two plates of each group of the plates form a water channel; the water channel communicates to the water inlet pipe and the water outlet pipe; the salient points of adjacent two groups of the plates are in contact; a smoke channel is formed between adjacent two groups of the plates; the water inlet pipe is connected to a water inlet header pipe; and the water outletpipe is connected to a water outlet header pipe. The single-row flue gas waste heat recovery device disclosed by the invention is conveniently mounted on a flue of a boiler or other combustion equipment, has smaller influence on the flowing property of flue gas, does not affect exhausting, is high in recovery rate of waste heat in the flue, and has a remarkable energy-saving effect.

The invention relates to the field of polymer modification, and in particular, relates to an anti-tiger wrinkle toughening master batch and a preparation method thereof. The invention discloses the anti-tiger wrinkle toughening master batch. The toughening master batch comprises the preparation raw materials in parts by weight: 37-69 parts of first-class polypropylene, 10-20 parts of second-classpolypropylene, 20-40 parts of a toughening agent, 0.5-1.5 parts of a processing aid and 0.5-1.5 parts of an antioxidant. The preparation method comprises the following steps: adding the raw materialsinto an internal mixer, and mixing and banburying to obtain a blend; pouring the blend into a two-way screw extruder, carrying out extrusion granulation, extruding a strip-shaped blend, introducing the strip-shaped blend into a water tank, cooling, after cooling, entering a granulator, cutting the strip-shaped blend into anti-tiger wrinkle toughening master batch particles; and drying the preparedmaster batch, sealing and packaging. The toughening master batch provided by the invention is simple in preparation method and convenient to operate, and can be used instead of a traditional toughening master batch; meanwhile, the toughening master batch is good in compatibility with a plastic product, high in toughening efficiency and resistant to tiger wrinkles.