927results about How to "Won't crack" patented technology

The invention discloses spherical attapulgite flower ceramsite. The key points of the technical scheme are that the spherical attapulgite flower ceramsite consists of high-adhesion attapulgite clay powder, attapulgite clay tailing powder, red bentonite powder, sludge, diatomite tailing powder and rice husk powder. The spherical attapulgite flower ceramsite is produced by the following steps of mixing the ingredients, pelleting, roasting, cooling, screening and packaging. The spherical attapulgite flower ceramsite has a rough and porous surface, is light in weight, high in strength and water absorption rate, can be immersed in water throughout the year without cracking and can continuously and slowly release nutrition required by flowers. Moreover, the spherical attapulgite flower ceramsite is produced by comprehensively utilizing the sludge and tailings, so that the resource utilization rate is improved, waste is turned into wealth, and environment is protected. Besides, the cylindrical attapulgite flower ceramsite is applicable to cultivation of various flowers and vegetables.

A inorganic dry powder paint with good mass sensation is prepared proportionally from cement, color sand, re-dispersed emulsoid powder, hydrophobic agent, inorganic pigment and filler. Its advantages are high adhesion to concrete, high weatherability, good air permeability, and no pollution. Its application method is also disclosed.

The invention discloses a continuous hot galvanizing method for 1180 MPa-grade Q&P steel. Continuous hot galvanizing is carried out on chilled rolls of the Q&P steel and comprises the heating stage, the soaking stage, the quenching stage, the reheating stage, the partitioning stage, the hot galvanizing stage and the cooling stage; in the heating stage, the chilled rolls are pre-oxidized, the pre-oxidization temperature ranges from 610 DEG C to 750 DEG C, the pre-oxidization time ranges from 10 seconds to 60 seconds, the pre-oxidization atmosphere is the mixed atmosphere of nitrogen gas and air, and the final oxygen content ranges from 300 ppm to 20000 ppm; in the soaking stage, the soaking temperature ranges from 800 DEG C to 950 DEG C, the soaking time ranges from 30 seconds to 150 seconds, the hydrogen content in the furnace atmosphere ranges from 4% to 5%, and the dew point ranges from minus 35 DEG C to 50 DEG C; in the quenching stage, high hydrogen or water is adopted for quenching, and the steel is cooled to 280-350 DEG C; in the reheating stage and the partitioning stage, the partitioning temperature is heated to 380-450 DEG C at the rate of 8-20 DEG C/s, and the partitioning time ranges from 60 seconds to 300 seconds; in the hot galvanizing stage, the hot galvanizing temperature is 460 DEG C, and the hot galvanizing time ranges from 3 seconds to 10 seconds; in the cooling stage, the air or the nitrogen gas is adopted for cooling, the cooling rate is 15 DEG C/s, and the steel is cooled to 150 DEG C. The hot galvanizing adhesion performance of the Q&P steel is improved through the method.

The invention provides a flexible stretchable conductive circuit, a preparation method and use thereof. The invention also provides double-sided wiring, multilayer board, flexible display, flexible electronics, and/or sensor comprising the flexible stretchable circuit described above. The method for preparing flexible stretchable conductive circuit provided by the invention is simple and rapid, and is generally applicable to various substrate materials, the liquid metal is used in a small amount, does not require additional external force, and the pattern does not generate cracks, the wire width is controllable, has a high resolution and it's very suitable for mass production.

The invention discloses a rapid investment casting method based on stereolithography (SL). A wax mould in investment casting is replaced with a resin prototype (1) produced by applying a 3D printing technology, the resin prototype (1) is of a thin-walled honeycomb structure, an ingate (2) is arranged on the resin prototype (1), a gating system adopts a conventional wax gating system (3), a groove (4) is formed in the wax gating system (3), the ingate (2) is inserted into the groove (4) to be bonded and fixed during tree casting, a wax rod (5) is arranged on the resin prototype (1), and vent holes are formed after shell making. The rapid investment casting method reduces the casting cost, reduces the production cycle, and avoids the cracking phenomenon of a shell in the process of roasting.

The invention relates to powder coating and particularly relates to powder coating for MDF transfer printing and an application method of the powder coating. The powder coating is prepared from the following raw materials in percentage by weight: 53-90% of resin, 0-6.7% of a curing agent, 0.1-0.5% of a curing accelerant, 3-25% of auxiliaries, 5-30% of filler and 0.8-25% of pigment. After the powder coating is used for transfer printing, the texture is clear, the penetration is deep, the third dimension is strong, the transfer printing paper can be easily uncovered, the thermal transfer printing product is durable in use, and the patterns are not dropped, cracked or faded; moreover, the thermal transfer printing only achieves a surface decoration effect without changing the characteristics of the original glossiness, the wear resistance, the weather resistance, the acid and alkali resistance, and the like of the product. The invention also provides an application method of the powder coating.

The invention relates to a martensitic stainless steel for an oil casing and a production method thereof. The artensitic stainless steel comprises the following chemical components in percentage by weight: at most 0.04% of C, 0.20-1% of Si, 0.30-1% of Mn, at most 0.02% of P, at most 0.010% of S, 14-17% of Cr, less than 5% and at most 7% of Ni, 1.5-2.3% of Mo, 0-0.16% of N, 0.05-2.5% of Cu, one or more of 0.01-0.10% of Nb, 0.01-0.10% of V and 0.01-0.10% of Ti, and the balance of iron and inevitable trace impurity elements. The manufacturing method of the steel comprises the following steps: heating the oil casing to 950-1100 DEG C, cooling to below 200 DEG C by air cooling, oil cooling or water cooling, and heating to 550-650 DEG C to implement tempering. The steel has a microstructure which uses a tempered martensite phase as a base phase, and contains high-temperature ferrite (delta-ferrite), austenite and other second phases of which the volume contents are respectively below 10% or the total content is below 15%. The steel provided by the invention has the characteristics of high strength (the yield strength is up to Grade 110-150ksi), strong carbon dioxide/chloride ion corrosion resistance and the like, and can partially substitute double-phase stainless steel to be used in deep wells, superdeep wells and other severe well conditions.

The invention discloses a grinding roller manufacturing/remanufacturing abrasion-resistant material and a preparation method thereof. A grinding roller is formed by a core roller body, a substrate abrasion-resistant layer, a transition layer and a roller face abrasion-resistant shape layer in a coupling mode. A core material is provided with the highly-abrasion-resistant modified boron-containing high-chromium cast iron substrate abrasion-resistant layer through casting and compounding. The substrate abrasion-resistant layer comprises, by mass, 1.75%-3.0% of C, 12.0%-18.0% of Cr, 0.2%-2.0% of B, 0.4%-0.8% of Mn, 0.4%-1.2% of Si, 0.30%-0.80% of Ni, 0.02%-0.04% of Mg, 0.03%-0.05% of Ce, 0.05%-0.10% of Ti, 0.006%-0.015% of N, 0-0.04% of S, 0-0.04% of P, and the balance Fe. Then surfacing of materials of the roller face abrasion-resistant shape layer is conducted on the surface of the transition layer. The roller face abrasion-resistant shape layer is formed by flux-cored wires through surfacing. The flux-cored wires comprises, by mass, 2.3%-3.5% of C, 14.0%-26.0% of Cr, 1.5%-2.0% of Ni, 0.8%-2.0% of Nb, 1.3%-2.0% of Mo, 1.2%-2.3% of Si, 1.0%-1.7% of Ti, 0.3%-1.0% of V, 0.2%-1.5% of B, 0-<0.007% of S, 0-0. 015% of P, and the balance Fe.

The invention relates to a fiber array coupled with a VSCEL or PIN array and a manufacturing method of the fiber array. The fiber array comprises a cover slip, a carving groove substrate and a fiber micro-strip, the fiber micro-strip comprises an exposed fiber micro-strip portion without a fiber coating, a V-shaped carving groove for holding the exposed fiber micro-strip portion is formed in the carving groove substrate, the cover slip presses the groove of the exposed fiber micro-strip portion, the carving groove substrate, the cover slip and the exposed fiber micro-strip portion are fixedly connected through binding agents, the cover slip is shorter than the V-shaped carving groove, the end face of the exposed fiber micro-strip portion is an optical plane with a 45-degree oblique angle, and the optical plane faces the carving groove substrate. The coupling distance between the 45-degree optical plane of the exposed fiber micro-strip portion and the VSCEL or PIN array is controlled by the aid of the cover slip of the fiber array, the thickness of the cover slip can be customized, and high-efficiency coupling is realized. The method for manufacturing the fiber array is simple, easy to implement and low in cost.

The invention discloses a coating composition and an application of the coating composition to a metal base material. The solid content of the coating composition is 40-70%. The coating composition comprises the following components of, by weight, 5-60% of saturation polyester resins, 0-25% of crylic acid resins, 2-30% of crossing-link agents, 20-80% of polyvinyl chloride homopolymer, 0-15% of additives, 0-40% of pigments and the balance dilution solvents, wherein average molecular weight Mn of the saturation polyester resins is 3000-8000, the vitrification temperature of the saturation polyester resins is 10-20 DEG C, the acid value of the saturation polyester resins is 0-5, the hydroxyl value of the saturation polyester resins is 30-90, and the saturation polyester resins are free of neopentyl glycol. The coating composition is free of bisphenol-A diglycidyl glycerol ether (BADGE) and bisphenol A (BPA). According to the coating composition, the polyester resins which meet requirements can be easily obtained, improved space of resin performances is large, 40%-70% of the solid content of final products can be achieved, and a large quantity of organic solvents are saved.

The invention discloses a preparation method of a flexible epitaxial ferroelectric film. The preparation method is characterized by 1) preparing a perovskite structure oxide strontium ruthenate bottom electrode by a laser pulse deposition method; 2) preparing a precursor solution of the ferroelectric film by means of a sol-gel method, wherein the concentration of the precursor solution is 0.1-0.5mol/L, the ferroelectric film material is selected from any one of lead zirconate titanate, barium titanate or bismuth ferrite; 3) preparing the flexible epitaxial ferroelectric film, spin-coating the above-mentioned strontium ruthenate bottom electrode with the precursor solution by means of a spin coating method to obtain a uniform wet film; 4) drying, pyrolyzing and annealing the obtained uniform wet film; and (5) repeating steps 3) and 4) for 3-8 times to obtain the target flexible epitaxial ferroelectric film, and the thickness of the film is in the range of 100nm-300nm. The flexible epitaxial ferroelectric film is simple in technology and excellent in ferroelectric performance.

The invention discloses anti-cracking mass concrete which is characterized by comprising the following components in parts by weight: 160-180 parts of water, 140-230 parts of cement, 105-128 parts offly ash, 80-90 parts of mineral powder, 980-1230 parts of macadam, 600-690 parts of sand, 8.8-9.3 parts of an admixture and 30-34 parts of a fibrous anti-cracking water-proofing agent. The cracking resistance of the mass concrete is improved by improving the ratio of the components in the concrete.

The invention relates to a method for smearing wood wax oil on the surface of a wood product, which comprises the following steps: 1, smoothening; 2, smearing the wood wax oil; 3, kneading a wax oil coating on the surface; 4, wiping floating oil; 5, drying; 6, repeating the steps 2-5 for one or two times; 7, polishing till the hand feeling is smooth; and 8, spraying polishing wax, polishing and entering a next assembly process. By using the method, the crack of the wood product can be effectively prevented, and the service life is prolonged; the operation is simple, and materials, labors and oil are saved; the wood wax oil is a green and environmentally-friendly coating and a low-carbon environmentally-friendly product; and by using the method, the wide application of the wood wax oil can be promoted, and an important significance on environment friendliness is realized.

The invention relates to improved cement-based self-leveling mortar and a preparation method and application thereof. The improved cement-based self-leveling mortar comprises the following components in percentage by weight: 50%-70% of aggregate, 31%-40% of cement, 13%-15% of anhydrite, 5%-15% of ground calcium carbonate, 0.05%-0.3% of water-retaining agent, 0.05%-0.2% of carbonate, 0.4%-0.9% of retarder, 0.3%-0.9% of lignocellulose, 0.2%-0.3% of antifoaming agent, 0.6%-0.9% of water reducer and 1.5%-4.5% of pure acrylic emulsion powder. The invention has the advantages of simple preparation and application methods, good construction peaceability, good waterproofness, greatly reduced microcracks, high mechanical physics property, good self-leveling performance and impact resistance, and excellent flexibility; no cracking and shrinkage occur to constructed ground; and in addition, the invention can effectively solve the problems of complex site operation process, unstable mortar performance, environmental pollution and the like of the existing dual-component cement-based self-leveling mortar, thus the self-leveling mortar is a green building material because no toxic and harmful matter is contained.

The invention discloses thermal sublimation transferring-printing coating pulp which comprises the following components in percentage by mass: 35-55% of hydroxyl-terminated polyester modified crylic acid resin, 10-30% of methyl etherified urea resin or butyl etherified urea resin, 0.1-1% of acrylic leveling agent and 24.5-45% of diluent, wherein the solid content of the hydroxyl-terminated polyester modified crylic acid resin is 60%+/-2%, and the acid value is 3-5mgKOH/g; the solid content of methyl etherified urea resin or butyl etherified urea resin is 75%+/-2%, the acid value is less than 1mgKOH/g; the diluent is a mixture of n-butyl acetate and diacetone alcohol. When the coating pulp is coated on the surface of a printed article and is heated, the hydroxyl-terminated polyester modified crylic acid resin has cross-linking reaction with methyl etherified urea resin or butyl etherified urea resin to form a net-shaped structure, and thus the pattern generated after transferring-printing is clear, full, high in color fastness, long-lasting without fading, and high in glossiness.

A solidifiable plastic material for shaping sculpture artwork is prepared through preparing component A by proportionally mixing epoxy resin with filler, preparing component B by proportionally mixing solidifying agent with filler, and mixing components A with B before it is used. Its advantages are no need of water, the solidifying time from 40 min to 16 hr, and not cracking.

The invention discloses a medicine preparation method for ampoules and a one-way valve type medicine preparation device. The medicine preparation method comprises the following steps: making a preparation, inserting needles into uncapped ampoules and an infusion bag, sucking liquid medicine in the ampoules into a transition container through a one-way valve I, injecting the liquid medicine in the transition container into the infusion bag through a one-way valve II, and pulling out the needles to complete medicine preparation. The one-way valve type medicine preparation device comprises a liquid catheter I and a liquid catheter II, wherein the liquid catheter I and the liquid catheter II are respectively connected with an interface I and an interface II on the transition container, the one-way valve I and the one-way valve II are respectively arranged on the liquid catheter I and the liquid catheter II, an interface III on the transition container is connected with an air pump, and a needle II further comprises a ventilating needle hole. The medicine preparation method disclosed by the invention can realize automatic preparation of liquid medicine in the ampoules and the operation is convenient to conduct; the ventilating needle hole in the needle II can balance internal and external pressure of the infusion bag, the medicine preparation becomes easier in combination with a liquid level controller, and the infusion bag is prevented from being expanded and cracked; since a chuck I and a chuck II respectively on a needle I and the needle II cooperate with a mechanical automatic control device, the automatic medicine preparation efficiency is further improved.

The invention provides a tile grout composition and a preparation method and an application thereof, and belongs to the technical field of building materials. The tile grout composition can solve the problems of waste in time and labor, low construction efficiency, and difficulty in dense filling during the existing ground joint filling. The tile grout composition comprises cement, an aggregate, a filler, an expansion agent, a water reducing agent, a water retaining agent, emulsion powder, an early strength agent, a moisture repellent, a defoaming agent, a thixotropic agent and other raw materials; after the tile grout composition is mixed with water, the joint is filled, so that the leveling of the tile grout is good, a miniature gap can be fully filled, and the self-leveling is realized. The tile grout composition has the advantages that the density after hydration is good, the shrinkage rate is low, the strength is high, the joint filling construction of ground tiles is convenient, the early strength after construction is higher, the adhering strength after hardening is higher, and the cracking and water leakage after joint filling are avoided; the preparation method is simple, and the tile grout composition is suitable for industrial production, and is especially suitable for filling ground tile joints in building material industry.

The invention relates to a method for producing an automotive rear shelf. The method is characterized by comprising the following steps of: (1) heating: hanging polypropylene sheets in a two-layer drying oven and heating, wherein the temperature of an upper-layer drying oven of the two-layer drying oven is between 240 and 260 DEG C; the temperature of a lower-layer drying oven of the two-layer drying oven is between 325 and 345 DEG C; and the heating time is 85 to 95 seconds; (2) pressing and forming: laying a fabric on two layers of PP sheets flatly, and pressing and forming the fabric in a die to obtain a half-finished product, wherein the pressure during pressing and forming is 70 to 90kg/cm<2>, and the forming time is 60 to 70 seconds; (3) cooling and shaping: cooling and shaping the half-finished product at the normal temperature, wherein the cooling time is 30 to 50 seconds; (4) installing accessories: installing the accessories on the half-finished product to obtain an automotive rear shelf finished product; and (5) examining and packing, wherein the fabric is a non-woven fabric, and the PP sheets are PP wood powder sheets with glue. The method ensures the performance indexes of light weight, high strength, difficult contraction distortion and the like of a rear shelf, greatly reduces the weight of the rear shelf, and meets the requirement for lightweight vehicle design; and as the material has a double-layer wood powder sheet structure, the product is fuller.

A process for preparing the composite carbon nanofibre film includes providing a substrate, depositing a metallic catalyst layer, putting it in low-pressure chemical vapor deposition system, adding carbon nanotubes and carbon nanofibres, and growing film.