46results about How to "Excellent physical performance index" patented technology

The invention provides a high flame retardancy type soft foam plastic insulation product and a preparation method thereof. The product comprises the following components in parts by weight: 12 to 15 parts of nitrile rubber, 8 to 10 parts of talcum powder, 0.5 to 0.8 parts of polyethylene glycol, 0.2 to 0.4 parts of antiager 4020, 15 to 20 parts of chlorinated paraffin, 0.6 to 0.9 parts of paraffin, 1 to 2 parts of epoxidized soybean oil, 0.1 to 0.3 parts of antiager RD, 0.4 to 0.7 parts of carbon black, 7 to 10 parts of polrvinyl chloride, 26 to 36 parts of fire retardant based on the total amount, 2 to 5 parts of dioctyl ester, 8 to 12 parts of azodicarbonamide, 0.2 to 0.5 parts of stearic acid, 0.4 to 0.7 parts of zinc oxide, 0.4 to 0.7 parts of sulphur, and 1.3 to 1.8 parts of accelerant based on the total amount. By adopting the high flame retardancy type soft foam plastic insulation product, the technical problem that the oxygen index and the smoke density are mutually conflicted in the technological manufacture is solved, and the bottleneck due to mutual limitation is broken through.

The invention relates to moisture-absorption polyamide-6 fiber and the manufacturing method. The invention utilizes a special-shaped spinning plate to produce the polyamide-6 fiber with a cross type cross section, the fiber of the invention has good moisture-absorption function, simultaneously, the invention also overcomes the default of the prior art for producing polyamide-6 fiber, and provides a manufacturing technology of high product qualification ratio.

The invention discloses a HPCP resin with a polyhydroxy structure which has the representative structural formula as follows, wherein R=-(CH2)n-or -(CH2)mO(CH2)m-; and n is larger than 2 or equal to 6, and m is larger than 2 or equal to 6. A preparation method the HPCP resin with the polyhydroxy structure comprises the following steps of: having a trans-etherification reaction between HMPN HPCP resin and dihydric alcohol under the catalysis of solid acid catalyst, and carrying out aftertreatment, so that the HPCP resin with the polyhydroxy structure can be obtained. According to the technical scheme disclosed by the invention, the methyl on the HMPN HPCP resin can be exchanged into the HPCP resin with 2-6 hydroxy structures through the trans-etherification technology, and can be further reacted with the isocyanate, so that the phosphorus fine polyurethane foamed plastics can be generated, wherein the foamed plastics is novel polyurethane material: the oxygen combustion index of the phosphorus fine polyurethane foamed plastic can reach to be more than 40-50, the inflaming retarding grade can reach B1 grade of GB/T8624-2012 standard, and each physical performance index of the phosphorus fine polyurethane foamed plastics is better than that of the other polyurethane foamed plastics.

The invention relates to a flame retardant soft foam polyether polyol and a synthesis method thereof. The technical scheme is to provide the flame retardant soft foam polyether polyol which is good in flame retardant property, safe and non-toxic, simple in preparation process and low in cost and the synthesis method of the flame retardant soft foam polyether polyol. The synthesis method disclosed by the invention comprises the following steps of enabling melamine-formaldehyde condensation compound to react with amine compounds, polymerizing the reaction product with an acid compound to obtain a polyether initiator, further polymerizing the polyether initiator with oxyalkylene with the action of a base metal catalyst so as to obtain the flame retardant polyether polyol. The flame retardant polyether polyol synthesized by the method has the advantages of light colour, low viscosity and good material flowability, and can be widely used for preparing the flame retardant polyether soft foam. The flame retardant soft polyether foam plastic products foamed and prepared by the flame retardant polyether polyol disclosed by the invention have the characteristics of good flame retardant effect, high oxygen index, good foam uniformity, good size stability and high mechanical strength.

The invention relates to a little-chlorine and little-pollution bleaching process for paper pulp biomimetic pretreatment, in particular to a little-chlorine element chlorine-free bleaching (ECF) process for the paper pulp biomimetic pretreatment. The process is a novel little-pollution bleaching technology in the paper pulp biomimetic pretreatment and belongs to the technical field of paper making. The process mainly comprises the following steps of: (1) carrying out metal salen biomimetic pretreatment to paper pulp bleaching, wherein metal salen, pyridine, H2O2 and O2 are used for carrying out bleaching pretreatment to oxygen-removal kraft pulp in alkaline condition; and (2) carrying out subsequent little-chlorine and little-pollution bleaching, wherein paper pulp after the biomimetic pretreatment undergoes three-section bleaching treatment, i.e., a chlorine dioxide bleaching section, a chelation treating section and a hydrogen peroxide bleaching section. The process is simple and easy to implement, has remarkable effect and can improve the whiteness and the property of the paper pulp. Compared with the conventional little-chlorine bleaching procedures, the bleaching process uses less chlorine. Compared with the conventional CEH bleaching, the bleaching process can reduce the time for pulping.

The invention discloses an Al23O27N5-combined corundum composite slide plate and a preparation method thereof, belonging to the field of a refractory material. The slide plate consists of the following raw materials in percentage by weight: 55-85% of corundum, 5-30% of activated aluminum oxide, 1-15% of metal Al and 0-3% of carbon black and graphite; and phenolic resin accounting for 2-6% of the total weight of the raw materials is added as a bonding agent. The preparation method comprises the following steps of: weighing the raw materials according to the proportions, and mixing uniformly; mixing to obtain pug; performing compression moulding; drying at 120-600 DEG C for 5-25 hours; and then sintering in a nitriding atmosphere at 1,200-1,600 DEG C for 5-25 hours. The apparent porosity of the product disclosed by the invention is 4-13%, the volume density is 3.0-3.4g/cm<3>, the cold crushing strength is 150-280MPa, and the high temperature bending strength is 20-55MPa. The Al23O27N5-combined corundum composite slide plate has good erosion resistance and thermal shock resistance and low cost; the main components of the raw materials have high chemical stability and low oxygen potential; and secondary pollution caused by C, O, H and other impurities is avoided in clean steel continuous casting.

The invention relates to a recycling method of a glass ceramic material. Waste generated in glass ceramic production is used as a main raw material, and recycling treatment is performed through the processes including smashing, screening, grading, binding agent adding, mixing and grinding, press-forming, drying, hot air hardening and the like to obtain a recycled glass ceramic product. Due to the fact that the waste produced in glass ceramic production is used as the main raw material, the energy consumption is reduced, stored waste glass ceramic materials can also be decreased, and environmental pollution is reduced. The production process is simple, the energy consumption is low, the production cost can be effectively reduced, different batches of products are good in reproducibility, and the recycling method is suitable for large-scale industrial production.

The invention relates to a SiC-AlN solid solution and Al2O3-C combined composite sliding plate and a preparation method thereof, and belongs to the field of refractories. The SiC-AlN solid solution and Al2O3-C combined composite sliding plate is prepared from the following raw materials in percentage by weight: 60-90% of corundum, 1-20% of alpha-Al2O3 micro powder, 1-15% of metallic aluminum, 1-15% of silicon, and 0-5% of powdered carbon, and 2-7% of phenolic resin is added as a binder. During production, the raw materials are mixed evenly according to the proportion, a mud material is obtained through mixing, pressing forming is conducted, drying is conducted for 5-30 h at 120-400 DEG C, then heat preservation is conducted for 1-10 h under the nitrogen atmosphere at 400-660 DEG C, and finally firing is conducted under the nitrogen atmosphere at 1450-1700 DEG C. According to the SiC-AlN solid solution and Al2O3-C combined composite sliding plate, reaction of Al, Si, C and N2 is utilized to synthesize a SiC-AlN solid solution reinforced phase in situ in an Al2O3 matrix, and the excellent properties are realized as follows: the apparent porosity is 5-20%, the volume density is 3.00-3.40 g/cm<3>, and the normal-temperature compressive strength 100-400 MPa. During firing of the SiC-AlN solid solution and Al2O3-C combined composite sliding plate, the ultra-high temperature and highpressure are not needed, the cost of applying a SiC-AlN solid solution to a refractory is greatly lowered, and the SiC-AlN solid solution and Al2O3-C combined composite sliding plate is suitable for industrial production. The SiC-AlN solid solution and Al2O3-C combined composite sliding plate integrates the advantages of metal, non-oxides and oxides, and has good thermal shock resistance, erosionresistance and high-temperature stability

The invention discloses a railway turnout oil-resistant rubber base plate and a preparation process thereof, and belongs to the field of railway accessories. The railway turnout oil-resistant rubber base plate comprises the following raw materials in parts by weight: 70-85 parts of polyurethane, 20-35 parts of PBT, 15-25 parts of nylon, 20-30 parts of carbon black, 10-15 parts of mica powder, 3-6parts of paraffin oil, 5-8 parts of zinc oxide, 1-2 parts of stearic acid, 2-8 parts of an anti-aging agent, 1-2 parts of an accelerant and 2-5 parts of a surface modifier. The preparation process comprises the following steps: preparing the mixed rubber, drying the rubber, carrying out injection molding, trimming, warehousing and the like. The turnout rubber base plate has good oil resistance, the application influence problem of the lubricating oil on the turnout rubber base plate is solved, the service life of the lubricating oil is prolonged, the maintenance amount of the railway engineering department can be reduced, and the operation safety of the train can be guaranteed; the injection molding machine is adopted for injection molding to prepare the rubber base plate, and the production efficiency is greatly improved.

The invention discloses a recycling method of a waste mining machinery tire and belongs to the technical field of recover of waste tires. The recycling of the waste mining machinery tire is realized by the six steps of crushing, strong magnetic separation, modification, low-temperature grinding, extrusion and mold forming. The recycling method of the waste mining machinery tire, disclosed by the invention, has the beneficial effects that the waste mining machinery tire is recycled, is excellent in all physical performance indexes and has a shore hardness of 78-81, a tensile strength of 27.3-27.9 MPa, a tensile rate of 480-486 percent, a tear strength of 50.1-50.7 KN/M, a service life of five-five and a half years and an impurity constituent of less than 0.03 percent; through test, the mainperformance is excellent. The recycling method disclosed by the invention can bring along outstanding economic and social beneficial effects, thereby having a wide market application prospect.

The invention provides a biological-enzyme pretreatment method for regenerated cellulose fibers, and belongs to the technical field of spinning. The biological-enzyme pretreatment method for the regenerated cellulose fibers comprises the steps of pretreatment, biological treatment, bleaching treatment, washing treatment, drying and the like, wherein biological treatment is carried out in an ultrasonic-wave environment through enzyme liquid of alkaline pectinase and amylase. By means of the method, it can be guaranteed that various physicochemical performance indexes such as the desizing rate,whiteness, wear resistance and capillary-effect radial direction of the regenerated cellulose fibers can reach or even exceed those of traditional technologies; meanwhile, the treatment method has a mild acting condition, has no damage to fabric, lowers the energy consumption, is environmentally friendly, and has a good market prospect.

The invention discloses a silicon-corundum-high-titanium mullite composite refractory material for a blast furnace and a preparation method, and belongs to the field of refractory materials. Metal silicon powder, high-titanium fused mullite and tabular corundum are used as raw materials, and resin powder and ethylene glycol are used as binding agents. Wherein titanium in the electric smelting mullite raw material exists in the form of a Ti2O3 independent phase. During production, the raw materials are weighed according to the proportion and mixed to obtain pug, and the pug is subjected to compression molding and sintered for 6-12 h at the temperature of 1100-1450 DEG C in the N2 atmosphere in the presence of solid carbon. The apparent porosity of the obtained product is 10-20%, the volume density is 2.70-3.05 g/cm < 3 >, the normal-temperature compressive strength is 70-230 MPa, and the product has good thermal shock resistance and erosion resistance. According to the prepared silicon-corundum-high titanium mullite composite refractory material for the blast furnace, a transition plastic phase process is utilized, metal silicon powder is added into the refractory material, a non-oxide reinforced phase (SiC, O '-Sialon) with excellent performance is generated in situ, and Ti (C, N) with an obvious furnace protection effect can be generated in the composite material in situ without additionally adding a titanium source.

The invention particularly relates to a titanium-magnesium-aluminum spinel brown fused alumina composite sliding plate and a production method thereof. The titanium-magnesium-aluminum spinel brown fused alumina composite sliding plate comprises the following raw materials in percentage by weight: 35-65% of brown fused alumina, 4-8% of activated alumina micro-powder, 10-38% of magnesium-aluminum spinel, 5-15% of metallic titanium, 5-10% of metallic aluminum and 3-5% of phenolic resin as a binding agent; and the production method comprises the following steps: weighing various raw materials in proportion during production, uniformly mixing, mixing to obtain pug, carrying out mechanical pressing for forming, drying at 180-250 DEG C for 24-48 hours, hooping, grinding, and coating to obtain the product. According to the production method, high-temperature firing and asphalt dipping are not needed, energy conservation and environmental protection are achieved, the production cost is lower, the prepared product is good in oxidation resistance, thermal shock stability and erosion resistance, the apparent porosity is 3%-8%, the volume density is 3.05 g/cm < 3 >-3.20 g/cm < 3 >, the normal-temperature compressive strength is 120-200 MPa, and the high-temperature breaking strength (carbon burying 1450 DEG C * 0.5 h) is 25-60MPa.

The invention relates to an unfired Al-Al2O3 carbon-free composite sliding plate and a preparation method thereof, belonging to the field of refractory materials. The sliding plate is prepared from 57-87% of corundum, 2-25% of active aluminum oxide and 1-20% of metal Al as well as binder phenolic resin accounting for 2-6% of the total amount of the raw materials. The preparation method comprises the following steps: proportionally weighing various raw materials, evenly mixing, compounding to obtain paste, carrying out pressure molding, and drying at 120-600 DEG C for 5-25 hours. The product has metal-nonmetal combined structure; and the apparent porosity is 3-10%, the volume density is 3.05-3.40 g/cm<3>, the ambient compressive strength is 100-250 MPa, and the high-temperature folding strength is 10-70 MPa. The product does not need high-temperature firing or oil impregnation, and has the advantage of low production cost; the used raw materials have high chemical stability and low oxygen potential, are free of carbon and easily hydrated Al4C3, and do not have secondary pollution of C, O, H and other impurities; and the product has excellent thermal shock resistance.

The invention relates to a preparation method for chromium-free ZrO2-CaO.ZrO2 composite material for a coal-water slurry gasification furnace, and belongs to the field of refractory materials. The preparation method comprises the following steps: (1) preserving the heat of a CaO source, a ZrO2 source and a bonding agent at 1500-1750 DEG C for a certain time, carrying out sintering to prepare a CaO.ZrO2 composite material with high density and perfect crystal grain development; and (2) crushing the synthesized CaO.ZrO2 composite material into different granular sizes, mixing the synthesized CaO.ZrO2 composite materials with ZrO2 in different granular sizes according to different proportions, adding a proper proportion of a binding agent, adding a proper ratio of a bonding agent, carrying out pressing formation, carrying out drying at 120-250 DEG C for 10-25 hours, and then carrying out high-temperature sintering at 1550-1800 DEG C for 5-12 hours. The product provided by the invention has high compactness, high strength, excellent thermal shock stability, hydration resistance, and coal ash slag erosion resistance and permeability resistance, can meet the use of the coal-water slurrygasification furnace, has high cost performance, does not cause environmental pollution in production and use, can be recycled, and is an environment-friendly material.