13results about How to "Reduce fluidity" patented technology

The invention discloses a medium-temperature curing high-temperature-resistant high-adhesion epoxy structural adhesive film as well as a preparation method and application thereof. The preparation method comprises the following steps: reacting high-rigidity diisocyanate with polyether polyol to obtain a polyurethane prepolymer, then adding bisphenol epoxy resin to carry out grafting reaction, and then adding carboxyl-terminated nitrile rubber to react with an epoxy group to obtain the high-temperature-resistant high-adhesion epoxy resin. And finally, mixing with a curing system and coating to obtain the intermediate-temperature curing high-temperature-resistant high-adhesion epoxy structural adhesive film. The preparation process disclosed by the invention is reasonable, and the high-temperature resistance of the adhesive film is remarkably improved by introducing high-rigidity groups such as naphthalene ring, biphenyl or p-benzene while the excellent processing property of the adhesive film is ensured; and through the synergistic effect of the polyurethane flexible chain segment and the nitrile rubber, the toughness and the adhesive property of a resin system are improved, and the loss of the resin in the forming process is reduced.

The invention relates to a high-fluidity low-temperature-resistant super-tough nylon composite material and a preparation method thereof, and belongs to the technical field of polymer composite materials. The composite material comprises monomer homopolymerized nylon, polymonomer copolymerized nylon, a dynamic crosslinking flexibilizer, an antioxidant and a lubricant. The dynamic crosslinking flexibilizer is prepared by extruding and granulating an ethylene-octylene copolymer, ethylene propylene diene monomer, maleic anhydride powder, a dynamic covalent bond-containing compound, a lubricant and an antioxidant under specific conditions. The composite material obtained in the invention has excellent fluidity in a molten state, overcomes the defect of poor fluidity of traditional toughened nylon, and is suitable for the fields of high-speed rails, automobiles, refrigeration equipment and the like with high requirements on low temperature resistance and impact resistance of materials.

The present invention discloses an anti-cracking water-reducing agent suitable for alkali-activated cement, and its preparation process and application. The raw materials for preparing the anti-cracking water-reducing agent include the following components: 500 parts of refined naphthalene, 200 parts of formaldehyde solution, 80 parts of dihydroxy-terminated dimethyl silicone oil, 100 parts of alkali solution, 15-20 parts of sodium dodecylbenzene sulfonate, 80-100 parts of sulfate solution, and 400 parts of water. The above-mentioned anti-cracking water-reducing agent of the present invention not only effectively solves the problems of instability and performance failure of existing water-reducing agents in high-alkali environments, thereby reducing the water consumption of alkali-activated cement while ensuring its good fluidity, but also can significantly reduce the shrinkage cracking of alkali-activated cement after hardening, and reduce the risk of cracking and damage.

The invention discloses early strength type decorative ultra-high performance concrete and a preparation method thereof. The early strength type decorative ultra-high performance concrete is prepared from the following raw materials in parts by weight: 35 to 45 parts of cement, 40 to 50 parts of sand, 2 to 5 parts of metakaolin, 5 to 10 parts of silica fume, 5 to 10 parts of calcium carbonate, 1 to 3 parts of nano-silica sol, 0.5 to 1.5 parts of water reducing agent, 0.05 to 0.3 part of modifier, 1 to 6 parts of fiber and 8 to 12 parts of water. And the modifier is one or a combination of more of a polyepoxy organic compound, a polyhydric alcohol organic compound, a polyene organic compound or a polyether organic compound containing hydroxyl, ester bonds or ether bonds. The nano silicon dioxide sol can promote the reaction of a cementing material in the UHPC, and meanwhile, the modifier can maintain the fresh mixing performance of the UHPC, so that the early strength of the decorative UHPC is finally improved, the development of the later strength is not influenced, the demolding requirement of a decorative UHPC product can be met, and the production efficiency of the decorative UHPC product is improved.

The utility model relates to a kind of gas meter air tightness detection device, comprising: water tank, translation mechanism, aeration mechanism, elastic support mechanism.The device water tank is divided into two water tanks by partition, translation mechanism and aeration mechanism are set in the lower of detection frame, gas meter is alternately placed in two water tanks to carry out air tightness detection, when left water tank gas meter air tightness detection is completed, re-place the gas meter to be detected, while translation mechanism will aeration mechanism be translated to the above right water tank, carry out air tightness detection to gas meter in right water tank, after detection, re-place the gas meter to be detected in right water tank, then translation mechanism will aeration mechanism be translated to the above left water tank, water flowability in left water tank is smaller at this time, water surface has tended to be stable, carry out air tightness detection to gas meter in left water tank at this time, and detection personnel is easier to observe the situation that bubble generates in water, so it improves the accuracy of gas meter air tightness detection.

A tobacco filler assembly and an electronic cigarette cartridge, which improve the fluidity of the air flow inside the tobacco filler assembly while securing a certain filling rate or more for the tobacco filler assembly as a whole and not allow a tobacco filler to easily drop out, are provided. A tobacco filler assembly is obtained by accumulating long tobacco fillers 20 in a bundle and whose outer peripheral portion is wound with a sheet-shaped package 25, in which each tobacco filler 20 is formed such that a dimension in a long side direction is longer than a dimension in a short side direction in a cross section orthogonal to a length direction, and a long side direction of a tobacco filler 20 of an outermost peripheral portion in contact with the package 25 is directed in a direction approximately along a circumferential direction or the long side direction of the tobacco filler is directed in a direction other than the direction approximately along the circumferential direction, and the number of tobacco fillers 20 whose long side directions are directed in the direction approximately along the circumferential direction is larger than the number of tobacco fillers 20 whose long side directions are directed in the direction other than the direction approximately along the circumferential direction.

The air-cooled cooking utensil comprises a pot body and an inner container, the pot body comprises an outer cover provided with a ventilation window, a heat preservation cover provided with an air inlet, a fan used for cooling the inner container and a fan support, the fan support is fixed to the heat preservation cover corresponding to the air inlet, and the ventilation window and the fan support are in butt joint to form an air inlet channel; the fan is located in the air inlet channel, the butt joint position of the ventilation window and the fan support is located in the interlayer space of the outer cover and the heat preservation cover, and a sealing piece is arranged between the ventilation window and the fan support to seal the butt joint gap between the ventilation window and the fan support. The sealing piece is arranged between the ventilation window and the fan support, the butt joint gap between the ventilation window and the fan support can be sealed, the problem that cold air generated in the using process leaks into the interlayer space from the gap or the fan sucks hot air in the interlayer space from the gap is solved, the air cooling efficiency is further improved, and the air cooling effect on the inner container is improved.

The present application relates to the technical field of welding materials, and in particular to a corrosion-resistant and wear-resistant slag welding wire and a preparation method thereof. The raw materials used for the corrosion-resistant and wear-resistant slag welding wire include a flux core and a steel strip, and the raw materials used for the flux core include micro-carbon ferrochromium-nickel powder, ferroboron, high-carbon ferromanganese, silicon-manganese alloy, aluminum powder, rutile powder, quartz powder, fluorite powder, ferrovanadium, ferroniobium, cobalt powder, tungsten powder, potassium carbonate powder, fused magnesia, marble powder, ferrotitanium, flux and iron; the preparation method is: crushing, drying and mixing the raw materials used for the flux core to obtain the flux core, and then filling the flux core into the rolled steel strip, closing the seam after filling, and drawing to obtain the corrosion-resistant and wear-resistant slag welding wire. The product of the present application can realize semi-automatic or fully automatic welding of spiral welding and swing welding. The welding wire has strong anti-porosity ability, high wear resistance and good corrosion resistance, which can significantly improve the hardness of the welding part and the anti-porosity ability of the weld.

The invention relates to nanometric liposome-like vesicles (chitosomes) comprising chitosan molecules, phospholipid molecules, a cross-linking agent and at least one active pharmaceutical or cosmetic ingredient; to the use of the chitosomes in pharmaceutical or cosmetic compositions; and to a preparation method thereof.

The application relates to the technical field of ceramic preparation, and provides a preparation method of high-thermal-conductivity aluminum nitride ceramic, which solves the problems of relatively poor thermal conductive performance and bending strength of the aluminum nitride ceramic prepared by the prior art; the method comprises the following preparation steps: 1) raw material preparation; 2) ball milling mixing; 3) preheating reduction; and 4) hot-pressing sintering.

The invention relates to a method for regulating and controlling the rheological property of 3D printing concrete. The method comprises the following steps: S1, preparing concrete printing slurry; the concrete printing slurry is prepared from the following components in parts by weight: 75 to 100 parts of cement clinker, 75 to 125 parts of aggregate, 0 to 25 parts of mineral admixture, 0 to 1 part of concrete admixture and 25 to 40 parts of water, s2, the concrete printing slurry is input into a pressurized carbonization stirrer, and CO2 is introduced after sealing; and S3, when the air pressure of CO2 is 0.05-0.5 MPa, pressurizing, carbonizing and stirring to obtain the concrete material with high constructability. Compared with the prior art, the concrete slurry is pressurized, carbonized and stirred before 3D printing of the concrete slurry, so that the concrete material can be effectively promoted to be converted from high working performance to high constructability, and the contradiction of the concrete material in rheological properties during transportation, pumping and printing is solved. Meanwhile, part of industrial waste gas with the high CO2 content can be consumed, and carbon emission of 3D printing buildings can be further reduced.

The invention provides a retarder for hydraulic concrete and a preparation method thereof, and belongs to the technical field of water conservancy and hydropower engineering. The invention discloses a concrete retarder which is prepared from the following raw materials in parts by mass: 10-15 parts of chitosan, 8-12 parts of cane sugar, 1-3 parts of citric acid, 10-15 parts of ethyoxyl diglycol ether, 4-8 parts of ammonium bicarbonate, 1-3 parts of sodium gluconate and 20-40 parts of mixed water, and the used concrete has the advantages of proper setting speed, long retarding time, low hydration heat, excellent later strength and durability, good workability, good water retention property, good water retention property and the like. The device adapts to different climates and construction requirements, facilitates site construction, is good in comprehensive performance and high in practicability, and has certain popularization value.

A first object of the present invention is to provide a method for producing a magnetic particle-containing composition which has excellent storage stability and has fluidity suitable for coating even after a certain period of time after stirring. A second object of the present invention is to provide a magnetic particle-containing composition which has excellent storage stability and has fluidity suitable for coating even after a certain period of time after stirring. A third object of the present invention is to provide a magnetic particle-containing cured product, a magnetic particle-introduced substrate, and an electronic material. The method for producing a magnetic particle-containing composition of the present invention includes a step of cooling, to 5°C or lower, a precursor composition which contains magnetic particles, a dispersant, and at least one of a solvent or a liquid reactive monomer, in which the dispersant has an amine-based adsorptive group and a crystalline polymer chain.