44results about How to "Small stretch rate" patented technology

It relates to the glue sleeve seal teeth shape reversed V shape forming sulfuration. It makes belt blank at the inner mold, installs the round cylinder glue sleeve with teeth on the surface inside and smooth surface inside both ends on the glue sleeve base and fastened with shrouding rings, putting them into sulfur can, hanging belt blank into glue sleeve, covering the top cap and the cap of the sulfur can, sequentially opening the outside pressure and inner pressure steam for sulfuration, stripping the belt blank round cylinder with vertical rack outside and the cutting belt blank round cylinder, getting many teeth shape cutting V belt. It solves the sealing issue at both ends of the glue sleeve, eliminating the bubbling stratification defect of the product, increasing effective cutting 2-4 lines, reducing material consumption and cost.

The invention is about a sort of lightweight partition wall board. It is made from magnesium oxide, magnesium chloride, dry rock powder, flyash, French chalk, high alumina cement, ferrous sulfate, tertiary sodum phosphate, phosphoric acid solution and sawdust. The lightweight partition wall board has the following advantage: the fist, it can save energy, reduce cost and have no pollution. The second, the board has fine intensity, good water resistance and resistance to aging. The third, it has small shrinkage, get over the problem that appear when the boards join. The fourth, the partition wall board no longer distort for using inorganic material and controlling the quality of material. Lastly, it has good shock resistance, waterproof, fire resistance, soundproofing and it get over the partition wall board to be yellow.

The invention relates to the technical field of papermaking, and provides a preparation method of white water-resistant and oil-proof paper so as to solve the problems of insufficient oil resistance and poor waterproof performance of the oil-proof paper. The preparation method comprises the steps: (1) preparing raw paper: mixing bleached chemical pulp, filler and cationic starch, dehydrating, squeezing and drying at a net part to obtain the raw paper; (2) coating for the first time: coating with a chitosan-culsageeite solution; (3) coating for the second time: coating with hydroxypropyl methylcellulose-silicon nano-particle coating liquid, and drying in sections; and (4) coating for the third time: coating with a polydimethylsiloxane solution dispersed by n-hexane. The double-proof paperhas extremely strong waterproof and oil-proof effects, and the surface of the double-proof paper is provided with multiple layers of liquid-proof coating layers and is provided with a compact internalstructure, so that the oil-proof paper is ensured to have high oil-proof grade, high density, good water resistance, low expansion rate, high strength and small paper banner thickness difference.

The invention provides a preparation method of a high-strength wear resistant polyester harness. The preparation method comprises the following steps: 1) doubling; 2) first twisting; 3) second twisting; 4) stranding; 5) size mixing in a size pool and dyeing; 6) dehydration; 7) first drafting setting and air-drying until the humidity is lower than 3%; 8) second drafting setting. The polyester harness provided by the invention has the advantages that the breaking strength is obviously enhanced; the wear resistance is improved; the ratio of expansion and contraction is reduced; the friction coefficient is increased by 30-60%.

The invention discloses an energy-saving and environmental-friendly light partition board and a preparation method thereof and relates to the technical field of partition boards. The partition board comprises the following raw materials in parts by weight: 65-70 parts of Portland cement, 40-50 parts of calcium carbonate, 32-35 parts of calcium oxide, 25-30 parts of a paraffin-kieselguhr compositephase change material, 20-24 parts of a modified carbon fiber, 10-18 parts of activated bentonite, 10-14 parts of a rubber powder, 9-10 parts of a modified loess powder, 9-10 parts of industrial solidwastes, 9-10 parts of modified fiber granules, 4-6 parts of an early strength agent, 4-6 parts of a water reduction agent, 4-6 parts of a foaming agent, 1-3 parts of a rare-earth catalyst and 75-95 parts of water. The energy-saving environmental-friendly light partition board is relatively good in pressure resistance strength, tensile strength, anti-cracking strength and hanging property, and inaddition has sound insulation and heat preservation effects.

The invention belongs to the technical field of building materials, and particularly relates to a production technology of an annual ring floor and an annual ring wall plate. The solid composite floorwith natural annual ring patterns is manufactured through selecting of annual ring wood, air drying of the wood, sectional cutting, drying treatment, manufacturing and bonding of wood cores, manufacturing of a surface plate, bonding of the surface plate and a base material, slotting and painting, the deficiencies in the prior art are overcome, the wood utilization rate is high, the compression resistant effect is good, and cracking is not prone to occurring.

The invention relates to a fire hose, in particular to a disposable woven double layer integrated fire hose. The disposable woven double layer integrated fire hose comprises an outer layer tube blank,an inner layer tube blank and a woven wire layer; the outer layer tube blank and the inner layer tube blank are synchronously woven and fixed by the woven wire layer between the outer layer tube blank and the inner layer tube blank to form an integration. According to the fire hose, a tube blank consists of the outer layer tube blank and the inner layer tube blank, and the outer layer tube blankand the inner layer tube blank are closely combined together to form an inseparable double layer structure, so that the outer layer tube blank and the inner layer tube blank look like two layers, butare of an integrated structure actually, the goodness of fit is great, and the fire hose prepared by the method has the characteristics of being small in expansion rate and stretching rate and capableof realizing wear resistance, compression resistance and zero waste of bursting force value.

The invention discloses an aging-resistant and wear-resistant light conveying belt which comprises aging-resistant and wear-resistant glue, and the aging-resistant and wear-resistant glue comprises the following components in parts by weight: 100 parts of PVC resin, 30-40 parts of a plasticizer, 20-30 parts of an aging-resistant modifier, 1-2 parts of an organic silicon wear-resistant agent, 4 parts of a heat stabilizer and 3 parts of color paste, Wherein the polymerization degree of the PVC resin is 1800-2200, and the K value of the PVC resin is 60-85. The 1% definite elongation strength of the conveying belt reaches 45 N/mm or above, the elongation is small, the specific gravity of the adhesive layer is low, the conveying belt is made of a thermoplastic material, the aging phenomena of cracking, falling and the like are not likely to happen even if the conveying belt is used in a high-temperature environment, the abrasion resistance is good, and the service life is long.

The invention discloses a technology adopting an oxidation heat twisting combination method for manufacturing straw mechanical pulp. The technology comprises the steps that straw is cut off and subjected to ozone treatment; a material subjected to ozone treatment is concentrated; the concentrated material is fed into a compound straw separator to be subjected to first-stage heat twisting; the material subjected to first-stage heat twisting is conveyed into a continuous steamer to be subjected to continuous steaming; the material subjected to continuous steaming is fed into a single straw separator to be subjected to second-stage heat twisting; the material subjected to second-stage heat twisting is conveyed into a latency device to be subjected to ozone oxidation; the material treated through the latency device is conveyed into a disc type separator to be subjected to wire separation and brooming; the material subjected to wire separation and brooming is screened in a low-concentration mode to obtain the straw mechanical pulp. According to the technology for adopting the oxidation heat twisting combination method for manufacturing the straw mechanical pulp, cellulose and hemicellulose are preserved to the greatest extent, and the pulp obtaining rate reaches 80% or above. The technology for manufacturing the straw mechanical pulp further comprises a technological waste water treatment technology, technological water is purified and recycled, and zero emission is achieved.

The present invention relates to road building material and is especially a kind of new material for road base layer. The material consists of flyash 65-95 wt%, lime 4-30 wt% and cure agent 0.5-5 wt%; and the cure agent consists of carbonate, chlorate, NaAlO3, MgFSi and Na3SiO3.XH2O. It meets the requirement of protecting environment, has high strength and low cost, and is water resistant and acid and alkali resistant.

The invention provides a reflector plate with different viscosity on double faces. The reflector plate comprises a base material, a silver coating is arranged at one side of the base material, and a graphite layer is arranged at the other side of the base material; the silver coating is coated with a thin adhesive layer, and the graphite layer is coated with a thick adhesive layer. The reflector plate with different viscosity on double faces can be applied to the lower part of a display screen, and has excellent characteristics that the reflector plate can be torn and pasted repeatedly, and is good in wrinkle resistance, low in ratio of expansion and contraction, and good in reflection effect and cooling effect, and is insulated and the like.

The invention discloses drying equipment and a drying process applied to thermal dye sublimation body paper. The drying equipment sequentially comprises a primary pre-drying unit, a primary drying unit, a surface gluing unit, a secondary pre-drying unit and a secondary drying unit along the advancing method of paper, the primary pre-drying unit comprises a big dryer and a plurality of supporting rollers arranged on the outer side of the big dryer, the primary drying unit comprises a plurality of first small dryers, the secondary pre-drying unit comprises a drying box, and the secondary drying unit comprises a plurality of second small dryers and a cooler which are arranged sequentially along the advancing direction of the paper. Primary pre-drying and secondary pre-drying are added before primary drying and secondary drying respectively, and the big dryer is adopted for primary pre-drying, so that through strong drying of the big dryer, expanding and contracting ratio of the paper is lowered effectively, and influence on smoothness of the paper due to scrapings caused by the fact that undried glue is bonded to a drying net and the dryers is avoided.

The invention relates to a surface moisture resisting agent for base paper, a production method of the surface moisture resisting agent and application of the surface moisture resisting agent in papermaking, and relates to the technical field of papermaking surface sizing. The solid content of the moisture resisting agent is 9-11%, and the moisture resisting agent is prepared from, by mass, 20-25%of a cationic polyacrylamide starch polymer and 5-15% of a styrene-acrylic or AKD surface sizing agent. The moisture resisting agent is obtained through the following steps that 1, hydroxyacrylamidemonomer, third monomer and hydrolyzed starch are polymerized, and a cationic polyacrylamide starch polymer is obtained; 2, the polyacrylamide starch polymer is mixed with the styrene-acrylic or AKD surface sizing agent, and a final product moisture resisting agent for the base paper is obtained. The moisture resisting agent for the base paper not only has the advantages of improving the ring crushstrength of the base paper and resisting damping, but also has the advantages of enhancing high temperature, high humidity and high cold resistance of the base paper. Zero emission of the chlorine content is achieved, the surface moisture resisting agent is environmentally friendly, the production method is easy to implement, the cost is low, and the surface moisture resisting agent is especiallysuitable for industrial production.

The invention provides manufacturing technology of a polyvinyl-polyester hook wire. The manufacturing technology comprises the follow steps : 1) performing wire merging; 2) performing first twisting; 3) performing second twisting; 4) winding the twisted compound wire, the twist degree of which is 180-270, into a stranded wire with a yarn reeler; 5) performing slurry mixing in a slurry pool; 6) putting the stranded wire into the adjusted slurry; 7) removing 60-70% of slurry from the sized polyvinyl/polyester compound wire with a dehydrator; and 8) performing drawing setting of the sized compound wire through a wire waxing machine for 15-25 min, when the dryness of the obtained polyvinyl/polyester harness wire reaches 70-80%, performing manual waxing for 2-3 min, and performing air-drying after the wire passes through the wire waxing machine till the humidity is less than 3% to prepare the polyvinyl-polyester hook wire. The prepared polyvinyl-polyester hook wire is obviously enhanced in breaking strength, and reduced in expansion and contraction, and the friction coefficient is raised by 30-60%.

The invention provides a sheet material with a three-layer structure and clothes. The sheet material comprises a first surface layer, a middle layer and a second surface layer which are sequentially arranged, the first surface layer is a macromolecule fiber layer plated with first metal, the middle layer is a macromolecule fiber layer plated with second metal, and the second surface layer is a water-tolerance macromolecule polymer coating. The sheet material is a light soft material, particularly applicable to military fields such as military operation command tents, anti-electromagnetic shielding clothes and electromagnetic shielding rooms and the fields such as aviation, aerospace and offshore wild rescue and used for military electronic countermeasures, military false targets and has electromagnetic shielding effects on 90db or more.

A manufacturing method of high-strength abrasion-resisting vinylon harness cords comprises the following steps of 1 doubling, 2 primary twisting, 3 secondary twisting, 4 stranding, 5 pulp mixing and dyeing in a pulp chest, 6 dehydration, 7 first-time drafting and setting and air drying and 8 second-time drafting and setting, wherein the humidity is lower than 3% through first-time drafting and setting and air drying. The breaking strength of the vinylon harness cords manufactured by means of the manufacturing method is remarkably improved, the abrasion resistance is improved, the ratio of expansion and contraction is reduced, and a frictional coefficient is improved by 30% to 60%.