32results about How to "Improve physical performance indicators" patented technology

The invention relates to a colourful environmental-friendly synthesized polymer waterproof paint which comprises the following components in parts by weight: 3-7 parts of petroleum resin, 5-15 parts of styrene-ethylene-butylene-styrene (SEBS), 5-15 parts of styrene-butylene-styrene (SBS), 5-10 parts of thermoplastic polyurethane elastomer, 4-8 parts of terpene resin, 4-8 parts of poly-alpha-methyl styrene, 2-5 parts of tung oil, 10-15 parts of mica powder, 0.2-0.5 part of antiager D, 0.2-0.5 part of antioxidant 264, 0.2-0.5 part of defoaming agent, 0.3-0.5 part of ultraviolet absorber, 35-45 parts of 120 # solvent, 5-15 parts of butyl acetate and 1-3 parts of color paste. The paint has the characteristics of unique waterproof property, acid-base resistance, ultraviolet irradiation resistance, heat insulation, anti-aging property, high adhesion strength, water repellent, good leakage-resisting effect, heat resistance, frost resistance and good elongation; and the paint also has the advantages of wide application range, moderate price, environmental friendliness, durability and the like, and is convenient to use, thereby meeting the demand of people in a real life.

The invention discloses a method for preparing oligosaccharide and paper pulp, belonging to the technical fields of pulping and the comprehensive utilization of pulping. The method comprises the steps of: using crop straws as raw materials, pre-treating the raw materials to obtain a pre-extracting solution, concentrating the pre-extracting solution by a membrane separation method, then obtaining a crude xylan solution via precipitation and centrifugal separation, and then preparing oligosaccharide via enzymolysis, vacuum concentration and frozen-drying. The pre-treated solid residues are stewed via an alkaline process so as to prepare unbleached paper pulps of which the indexes such as fiber length, whiteness, fracture length, tear resistance, folding strength and the like are all improved. The generated black liquid has the characters of low viscosity and high heat productivity. The method for preparing oligosaccharide and paper pulp integrates the comprehensive utilization method with the biomass transformation method on the premise of optimizing the traditional alkaline chemical pulping technique to prepare products with high additional values, namely oligosaccharide, thereby increasing the quality of the paper pulp and the extraction, vaporization and combustion performances of the black liquid.

The invention relates to a dyeing and finishing process of a pure-flax Huashu textile fabric, comprising the following steps of: singeing fabrics, stacking enzymes, oxidizing chlor-alkali, removing wax and crimples, dyeing, softening by AIRO air, shaping and ironing and finishing by steam. The pure-flax Huashu textile fabric not only maintains the original excellent characteristics of pure-flax fabrics, but also has good drapability, skin intimacy, low strength loss and high dye fastness, has the functions of shaping details and remembering small folds, eliminates itchy feeling and expands the use field of fabrics. The invention has reasonable process design, is environment-friendly and greatly reduces the use of energy and water resources.

The invention belongs to waterproof material technical field in water conservancy and civil building engineering, and in particular discloses a macromolecule composite heat-resistance waterproof sheet used for production of waterproof coil and the preparation method. The technical proposal is that the invention consists of a middle layer consisting of polypropylene, HDPE and maleic anhydride grafting agent and surface layers consisting of linear polyethylene and HDPE bonded at two side surfaces of the middle layer; the macromolecule composite heat-resistance waterproof sheet is extruded and compounded by the middle layer and the surface layers at two sides of the middle layer; the physical performances of the formed waterproof sheet are greatly improved; by detection, the longitudinal and transverse tensile strength is more than 300N/50mm, namely, more than 500%; the perforation resistance reaches more than 80KN/m when the thickness is more than 0.5mm and reaches 30KN/m when the thickness is less than 0.5mm, thus meeting the engineering requirement.

The invention provides a transparent solvent-free single-component waterproof paint and a preparation method thereof. The transparent solvent-free single-component waterproof paint comprises the following raw materials in parts by weight: 30-45 parts of combined polyether polyol, 10-20 parts of isocyanate, 0.01-0.02 parts of a polymerization inhibitor, 10-20 parts of a plasticizer, 0.1-0.2 parts of a wetting dispersant, 0.04-0.08 parts of a catalyst, and 0.1-0.3 parts of a carbon dioxide inhibitor. According to the invention, the environmental protection raw materials substitute toxic solvents, a reaction-type antifoaming agent is employed for preparing the high-solid content environment-friendly type transparent solvent-free single-component waterproof paint, and the waterproof paint has the advantages of excellent coating performance, low cost, safety, environmental protection, and non pollution.

The invention provides a defibrator system and a defibrination method of the defibrator system, wherein the defibrator system comprises a feed hopper and a defibrator. The feed hopper is longitudinally arranged on the front end of a twin-screw extruder, a back-jet resisting device, a vertical drop hopper, a horizontal preheat tank with screw conveying, a belted screw feeder and the defibrator are sequentially arranged on the rear end of the twin-screw extruder, and steam balance control systems are arranged on inlet and outlet of the horizontal preheat tank. The defibrination method of the defibrator system comprises the following steps: feeding wood chips of a certain specification into the longitudinally arranged feed hopper; conducting primary dissociation and conquassation on the wood chips through dynamic extrusion of the twin-screw extruder; feeding the conquassated wood chips into the vertical drop hopper; conducting precooking on the conquassated wood chips dropping into the horizontal preheat tank by self-weight at temperature from 110 to 130 degrees centigrade in the horizontal preheat tank; feeding the precooked conquassated wood chips into the defibrator by the belted screw feeder through the screw conveying of the horizontal preheat tank; and forming wood fiber with high physical property after defibration of the defibrator. The defibrator system and the defibrination method of the defibrator system are high in using raw materials and capable of improving capacity by at least 50 percents.

The invention provides an elastomer composite mud absorption rubber tube and the manufacturing technique thereof. The elastomer composite mud absorption rubber tube mainly comprises a mud absorption rubber tube body, cord fabric, a tightening steel wire, a rubber tube outer layer, a steel ring and a flange steel short sleeve, wherein a middle layer is arranged on the inner surface of the cord fabric, the middle layer is made of canvas, a composite layer is arranged on the inner surface of the middle layer, and the composite layer is made of polyurethane materials or polyurea materials. After a rubber tube blank is manufactured, the cast-molding technique or the centrifugal molding technique or the spray-molding technique is adopted to manufacture the elastomer composite mud absorption rubber tube. According to the elastomer composite mud absorption rubber tube and the manufacturing method thereof, due to the elimination of inner glue existing in a current mud absorption rubber tube, the vulcanizing time of the tube blank is shortened; the middle canvas layer single-face rubber lining technique improves the bonding strength between an elastomer and the cord fabric; due to the fact that specialized supports are designed and used in the centrifugal technique and in the spraying technique, the deformation problem of the tube body in a manufacturing process is solved, and the uniformity of the thickness of the composite layer is guaranteed.

The invention relates to a quinary P type hard alloy which comprises the components with the weight percentage: 16% of hard phase titanium carbide, 8% of tantalous carbide, 6% of niobium carbide, 10% of cobalt, 0.006% of lanthanum and the rest of hard phase tungsten carbide. The product of the invention has high flexure strength, good impact strength and red hardness; the hard alloy can be used for rough machining large scale alloy forgeable piece without forging a knife when in use, so as to appropriately improve the processing efficiency; furthermore, the knife has long service life.

The invention discloses a preparation method of environment-friendly type melamine-based foamed plastic, comprising the following steps: firstly adding melamine, paraformaldehyde and water into a reactor, adding a modified monomer, adjusting pH value of the solution, and then reacting by steam heating; adding a formaldehyde-removal functional monomer after the reaction and continuously stirring and reacting to obtain expandable low-formaldehyde melamine-based resin; successively adding an emulsifier, a compound curing agent and a foaming agent into an auxiliary agent reaction vessel and uniformly mixing to obtain a mixed auxiliary agent; cooling the resin, respectively metering and carrying out high-speed emulsification on the resin and the mixed auxiliary agent in a twin-screw extruder, carrying out microwave foaming after the emulsification to obtain melamine-based foam M1; and finally drying the melamine-based foam M1 successively by superheated steam and microwave drying treatmentso as to obtain the environmentally-friendly type melamine-based foamed plastic product. According to the invention, industrial production of the melamine-based foamed plastic product with zero formaldehyde release is realized, and the key indexes for industrialization of the melamine-based foamed plastic and the environmental safe process bottleneck are solved.

The invention discloses a method for preparing an enhanced belt for nano SiO2/PET enhanced RTP, wherein the method is characterized in that: the method uses filament bundle prepared by a nano SiO2 PET composite material as a start material, and orderly comprises the following steps of drawing-off, cabling and impregnating. The method has advantages of reasonable technology, good quality of finished product and low production cost, satisfies technology requirement for enhancing a RTP pipe, and provides powerful technology support for widely popularizing and utilizing the RTP pipe in the fields of petroleum exploitation and transport, sea exploitation, city common waterpipe and facilities for a field army.

The invention discloses a modified foaming process for reclaimed materials of a multilayered co-extruded polypropylene core layer. The modified foaming process comprises the following step: extruding an upper-layer intensified sheet material through a first screw rod extruder; and extruding an intermediate foaming sheet material through a second screw rod extruder; extruding an upper-layer intensified sheet material through a third screw rod extruder; and compounding the upper-layer intensified sheet material, the intermediate foaming sheet material and a lower-layer intensified sheet material to form a composite foaming sheet material. The modified foaming process is simple and easy to carry out; the polypropylene foaming materials can be circularly utilized, the energy conservation and the environmental protection are realized, and all physical property indexes of the polypropylene foaming materials are improved.

The invention relates to a method for preparing a quinary P-type hard alloy. The quinary P-type hard alloy consists of the following components in percentage by weight: 16 percent of hard-phase titanium carbide, 8 percent of tantalum carbide, 6 percent of niobium carbide, 10 percent of cobalt, 0.006 percent of lanthanum, and the balance of hard-phase tungsten carbide. The preparation method comprises the following steps: mixing the components, wet-milling the mixture by a tilting wet mill, and discharging the mixture after wet-milling; and waxing and pelletizing the mixture through spray drying, pressing the mixture to form a shape by an automatic press, sintering the mixture in vacuum, and tempering the mixture to obtain a sintered finished product. The product prepared by the method has high bending strength, good impact strength and good red hardness; and when the product is coarsely processed into a large-size alloy forged piece, a cutter is not driven during use, the processing efficiency can be properly improved, and the service life of the cutter is long.

The invention relates to a cambered-octagonal-surface resin diamond which is composed of the following raw materials in percentage by weight: 5-10% of silver solder, at most 5% of organic pigment, 55-60% of polyurethane resin, at most 1% of photoinitiator, 8-10% of calcium carbonate, at most 3% of assistant and the balance of organic diluent. The diamond surface of the resin diamond is a cambered octagonal structure, and thus, has higher refractivity, strength, hardness, light fastness, corrosion resistance and service life than the existing resin diamond. The experiment proves that when the resin diamond is irradiated by a gloss instrument from a 45-degree angle, the refractivity is greater than 98 degrees and is much greater than the value of 80 degrees in the existing resin diamond. Meanwhile, no phenomenon of damage is detected in a 1-kilo free falling body bounce impact elasticity test.

The invention discloses a preparation method of high-transmittance low-resistance air filtering paper. The preparation method comprises the following steps: step 1, preparing a reaction mixture; step2, preparing a mixing slurry; step 3, preparing a mixing fiber slurry; step 4, preparing a mixing powder; step 5, preparing a mixing paste; step 6, preliminarily preparing a paper base; step 7, coating and drying the paper base to obtain the final environmentally friendly efficient high-transmittance low-resistance air filtering paper. The prepared high-transmittance low-resistance air filtering paper is better in air permeability and lower in airflow resistance, the filtering efficiency is excellent, the filtering paper has the flowery odor of the plant and has the functions of preventing mould, sterilizing, and effectively repelling mosquitos, meanwhile, the deformation resistance, the differential pressure resistance and the bursting strength of the filtering paper are better, in addition, a large quantity of waste is used, the cost is lowered, the environment is protected, the resource is saved, and the preparation method has a higher practical value and an excellent application prospect.