42results about How to "Have density" patented technology

The invention relates to a weather-resistant heavy-duty anticorrosive powder coating comprising the raw materials in parts by weight: 450-500 parts of hydrogenated bisphenol A epoxy resins, 50-99 parts of curing agents, 0.5-1 part of catalysts, 50-100 parts of zinc-rich fillers, 10-20 parts of self-repairing conductive macromolecule compounds, 190-240 parts of weather-resistant pigments and fillers and 30-50 parts of additives. A preparation method of the coating comprises the steps of putting the raw materials into a high-speed mixer, putting in an extruder after subjecting to dry mixing, carrying out fusion, mixing, cooling and preforming at an extrusion temperature of 80-90 DEG C, grinding by utilizing a grinder, grading, sieving and packaging to obtain finished products of the powder coating. The powder coating disclosed by the invention is mainly applied in the coating of outdoor heavy-duty anticorrosive environments, has excellent anticorrosive performance and weather-resistant performance and is an ideal heavy-duty anticorrosive coating capable of being used for outdoors. Proved by customer use and detection of relevant authoritative departments, the anticorrosive performance and the weather-resistant performance of the coating are excellent and can be completely up to indexes of imported similar products and certain indexes even exceed those of foreign products; the price of the coating is superior than that of the imported products; and therefore, the coating is well received by customers.

The present invention provides continuously crimped propylene polymer nonwoven fabrics as well as processes for forming crimped multicomponent propylene polymer fibers by melt-attenuating extruded multicomponent fibers with heated or unheated air wherein the fibers spontaneously crimp without the need for additional heating and/or stretching steps.

The invention belongs to the technical field of high polymer materials and discloses a light composite board which can serve as automotive interior parts, a production method and application thereof. The light composite board is prepared from the following components in percentage by mass: 30-70 percent of polyolefine fiber and 30-70 percent of glass fiber. The invention also discloses a method for manufacturing a ceiling of the automotive interior part from the light composite board. The method comprises the following steps of: cutting the light composite board according to the required size, and removing slitter edges to obtain a ceiling framework; heating to the temperature of 170-220 DEG C, and laminating a facing layer to obtain a thickened decorative ceiling framework; performing mold pressing by a corresponding mold at normal temperature, wherein the pressure is 0.05-0.5MPa, and the mold pressing time is 20-40 seconds; and removing the excessive facing layer, trimming the side hole burrs, and checking and warehousing to obtain the ceiling of the automotive interior part. The invention also discloses a method for manufacturing a protective bottom plate of the automotive interior part from the light composite board. The light composite board is excellent in comprehensive performance.

The invention discloses a preparation method and an application method of granular activated carbon for xylose decoloring, which belongs to the field of preparation methods and application methods of activated carbon. The preparation method comprises the following steps: (A) preparing raw materials, namely, weighing phosphoric acid method powder activated carbon made from saw dust, an acrylic emulsion and water according to a ratio of acrylic emulsion to phosphoric acid method powder activated carbon to water being (0.37-0.39):1:1; (B) mixing the raw materials, namely, mixing the weighed raw materials and sufficiently stirring till the granules are uniformly mixed; (C) forming granules, namely, extruding the uniformly mixed raw materials to form granules by using a pelletizing machine at the constant temperature of 90 DEG C, so as to make granules with the particle size of 2-5mm, cooling the granules to be 40-50 DEG C, and drying; (E) separating and cooling. The granular activated carbon prepared by using the method is good in adsorption property, high in strength, acid-alkali resisting, recyclable and reusable, the liquid adsorption amount of unit volume is equivalent to that of other granular activated carbons, and the production environment is improved.

The invention discloses a preparation method for an aluminum-graphene metallic composite. According to the method, (1) fluorides are added into alkali chlorides, even mixing is conducted, and then metallic or nonmetallic carbide powder is added; (2) an aluminum sheet is placed in an alumina crucible, a mixture in the step (1) is placed on the aluminum sheet, the alumina crucible is covered up and placed in a vertical heating furnace, the temperature is increased to 700-800 DEG C under the ordinary pressure, and roasting is conducted for 0.5-5 h; and (3) a liquid mixture formed in the step (2) is poured into the crucible and cooled for 1-2 h at the room temperature, after the liquid mixture is solidified, a sufficient quantity of sodium chloride solutions are added, a solid mixture is left after filtering, the aluminum sheet in the solid mixture is slowly grabbed out and placed on cover glass through a tweezer, the aluminum sheet is placed in deionized water, after water is changed for three times, drying is conducted, and the aluminum-graphene metallic composite is obtained. The technique is simple, capable of saving energy and low in cost; and the hardness, strength and ductility of the prepared aluminum-graphene composite are at least two to three times higher than those of pure aluminum materials.

The invention belongs to the technical field of polyurethane application and particularly relates to a polyurethane flower arrangement mud material and a preparation method thereof. The polyurethane flower arrangement mud material comprises a component A and a component B. The mass ratio of the component A to the component B is 1: 0.9-1.1, the component A is composed of polyether polyol A, polyether polyol B, polyether polyol C, polyether polyol D, a chemical foaming agent, a catalyst, a foam stabilizer and an additive, and the component B is polymerized diphenylmethane diisocyanate. The polyurethane flower arrangement mud material disclosed by the invention has the advantages of adjustable density and color, high aperture ratio, good water absorption and environment-friendly foaming system, and the prepared flower arrangement mud material can be recycled, so that the damage to the environment is avoided. The preparation method disclosed by the invention is simple and easy to implement, energy-saving and consumption-reducing.

The invention discloses a full-thread degradable pure-magnesium bolt, and relates to the field of medical implants. The full-thread degradable pure-magnesium bolt comprises a body and a nut, wherein threads are formed in the body; a profile counter bore is formed in the nut. The full-thread degradable pure-magnesium bolt is characterized in that the ratio of the length of the threads to the length of the body is 1:1; the nut is a tension nut; and the inclination angle between the side, connected with the body, of the tension nut and the center line of the body is 22 degrees to 30 degrees. The full-thread degradable pure-magnesium bolt can be degraded automatically, is low in cost, has higher histocompatibility and higher biomechanical property, can induce the generation of bone tissues, and can meet the requirements of patients.

A microprocessing technology for silicon nitride ceramic workpiece with high hardness and resistance to high temp and oxidization includes such steps as shaping by hot die pressing or plasma discharge sintering of Si powder, fine processing by precise machining, or fine electrospark machining, or fine electrospark machining, or photoetching, or reactive ion etching, and heating in N2 for nitrifying reaction. It has high compactness.

The invention belongs to the field of enzyme catalysis, and in particular relates to a method for preparing OPO structure lipid through enzyme catalysis under the supercritical CO2 condition. The method for preparing the OPO structure lipid through immobilized enzyme catalysis specifically comprises the following steps: taking halogenated carboxylic acid, imidazole compounds, carbonyldiimidazole and a lipase solution as raw materials, and carrying out reaction to obtain an acylated lipase solution; adding zinc nitrate into deionized water; dissolving 2-methylimidazole, the acylated lipase solution and polyvinylpyrrolidone in the deionized water; mixing the solutions, thus obtaining immobilized lipase; and taking glycerol tripalmitate and oleic acid as reaction substrates, adding the immobilized lipase, placing in a reaction still, introducing medium CO2, carrying out reaction, and carrying out separating, thus obtaining the OPO structure lipid. For the method, the reaction conditions are mild, the operation is simple, the utilization rate of the raw materials is high, the conversion rate is high, the purity is high, meanwhile, an enzyme catalyst can be repeatedly utilized, the selectivity is high, the pollution to the environment is small, the production cost is reduced, and the method is expected to realize industrial production.

The invention discloses an isotropic graphite material and a manufacturing method. Intermediate-phase carbon microspheres subjected or not subjected to pre-treatment, is moulded into green pressing through cold isostatic pressing and subjected to multi-step carbonation to effectively shorten processing time and obtain isotropic graphite material with excellent isotropic properties, intact and flawless surface and excellent mechanical, thermal and electric properties.

The invention discloses a chemical pump used rubber sealing material. The chemical pump used rubber sealing material is characterized by being prepared from the following ingredients: butadiene styrene rubber, fluororubber, polyethylene glycol, stearic acid, an anti-aging agent, sulfur, polypropylene and a modified filler. Compared with the prior art, the chemical pump used rubber sealing material prepared by the invention has the advantages of good flexibility, low density, compression resilience, wide temperature using range and the like, also has the advantages of higher tensile strength, tearing strength and abrasive resistance, large elasticity modulus, high temperature resistance, chemical corrosion resistance, good heat-conducting property, low thermal expansion coefficient and the like and has self-lubricating property; all the ingredients are uniformly dispersed in the sealing material, therefore, the stability is high, so as to further improve the property of the sealing material; the heat dispersion of the sealing material can be greatly improved through the synergistic effect of all the ingredients and the modified filler, so as not to generate the phenomenon of temperature accumulation.

The invention relates to a grinding and polishing system for stone machining. The system comprises a machine frame, a moving mechanism arranged on the machine frame and a grinding and polishing mechanism arranged on the moving mechanism. The moving mechanism comprises a supporting bottom plate, wherein the supporting bottom plate is arranged on the machine frame, a motor fixing block is arranged at the bottom of the supporting bottom plate. A first driving motor is arranged on the motor fixing block, the output end of the first driving motor drives a synchronous wheel and a synchronous belt, and the synchronous belt is connected with a driving block. The two ends of the driving block are connected with first supporting frames, first guide rail sliding blocks are arranged on the inner sides of the first supporting frames, and the first guide rail sliding blocks are arranged on the two sides of the supporting bottom plate. According to the grinding and polishing system for stone machining, a piece of cylindrical felt is arranged, when machining is conducted, the felt rubs the machined plane, a polishing solution is effectively removed, the activity of the solution can also be improved through the heat generated by friction, and a dissolution reaction is promoted. In the adsorption process, polishing is carried out, and the felt continuously eliminates and forms an adsorption layer under the friction effect.

The invention discloses a machining process for a modified fabric. The machining process comprises the following steps: moistening a fabric, and feeding the fabric through at least one pair of rollerswhich are heated to 100-260 DEG C, wherein the rollers are adopted to exert pressure of about 20-5800psi to the fabric passing through the rollers, the fabric is a woven, non-woven or knitted fabricor a fiber non-woven net fabric, the water content of the wet fabric accounts for 8-65% of the weight of a dry fabric, the pressure of the rollers is 8-1900psi, and the rollers are heated to 110-230 DEG C. By changing one or more parameters, physical properties of the fabric decided by different viscosities can be changed, such as the stiffness or the hand feeling; by changing passing speeds of the fabric between the rollers or the types of the roller, the physical properties of the fabric can be also changed.

The invention provides preparation and processing equipment and method for an aluminum oxide grinding medium, and relates to the technical field of preparation and processing of grinding media. The preparation and processing equipment comprises a bottom plate, a supporting frame, a mold pressing device and a drying device, wherein the supporting frame is fixedly arranged on the bottom plate, the mold pressing device is arranged on the supporting frame, and the drying device is arranged below the mold pressing device. In addition, the preparation and processing equipment and method can solve the following problems that a, in the existing preparation and processing process of the aluminum oxide grinding medium, the volume density of the aluminum oxide grinding medium is unqualified, the quality of the aluminum oxide grinding medium is poor, the aluminum oxide grinding medium is prone to being broken in the using process, and therefore the equipment is damaged when a mill is used; and b, in the existing preparation and processing process of the aluminum oxide grinding medium, the product is not subjected to subsequent drying treatment in time after mold pressing, so that the aluminum oxide grinding medium is not of a regular spherical structure during forming, and the shape of the product is changed.