58results about How to "No white spots" patented technology

The invention discloses a PET composite material, which comprises the following components in parts by weight: 34 to 55 parts of PET, 25 to 45 parts of enhanced filling material, 3 to 8 parts of composite nucleating agent, and 0 to 3 parts of flexibilizer; wherein the composite nucleating agent comprises a chemical nucleating agent and a plasticizer, the weight ratio of the plasticizer to PET resin is 3.5-7:100, the plasticizer is prepared by compounding a benzsulfamide plasticizer with other plasticizers, other plasticizers can be one or more of polyethylene glycol-diethyl hexyl alcohol, neopentyl glycol diphenyl ester, tribenzyl propylidene ether diethyl hexyl alcohol, and triethylene glycol diphenyl ester, the structural formula of the benzsulfamide plasticizer is represented in the description, and in the structural formula, R represents a branched alkyl group or a straight chain alkyl group. The composite material is injection-moulded at a mould temperature of 85 DEG C, the crystallization is complete, the moulding period is short, and the PET composite material can be used to produce large moulded goods or precision thin-wall moulded goods.

The present invention discloses one kind of high density polypropylene composite material for making counters in entertainment industry. The high density polypropylene composite material consists of ethylene homopolymer 8-40 wt%, barium sulfate 40-80 wt%, talcum powder 0-20 wt%, calcium carbonate 0-20 wt%, PP-g-MAH 4-6 wt%, POE-g-MAH 0-3 wt%, molecular weight regulator 0.5-2 wt%, oleamide 0.5-1.5 wt%, erucyl amide 0.5-2 wt%, PP wax 0.5-2 wt%, coupling agent 1-1.5 wt%, and pigment 0-5 wt%. The high density polypropylene composite material has great specific weight, high strength, high toughness, excellent wear resistance, good handing and other advantages.

The invention discloses a high-temperature inner formation method of a power type lead-acid storage battery. The method includes steps of S1, adding sulfate electrolyte in the type lead-acid storage battery and then staying for 0.2-0.5 hour; starting a charging procedure; S2, high-temperature formation stage; S3, room-temperature formation stage; S4, after charging, pumping acid and finishing theformation. The method can guarantee the uniform formation of a positive plate of the lead-acid storage battery; the active matters of the type lead-acid storage battery are fully converted; the charging power amount before discharging a battery set is few and the formation charging time is short.

The present invention provides a children cefuroxime sodium compound entity, which has the following structural formula. The preparation method comprises: (1) dissolving a cefuroxime sodium crude product in water, adding active carbon, carrying out stirring decolorization, and filtering; (2) adding an extractant to the filtrate, transferring and filling into a pressure resistance container, removing air bubbles, carrying out temperature control freezing, and taking out; (3) carrying out liquid-solid separation, adding acetone in a dropwise manner after the solid melts, stirring at a slow speed, growing the grain, filtering, washing, and carrying out vacuum drying; and (4) adding acetone, water and the obtained cefuroxime acid to a crystallizer, stirring until achieving a dissolved state, adding a sodium liquid in a dropwise manner, continuously stirring, growing the grain, carrying out suction filtration washing, and carrying out vacuum drying to obtain the cefuroxime sodium finished product. The powder used for injection and prepared from the children cefuroxime sodium compound of the present invention has advantages of good clarity (no white point phenomenon), good stability, low impurity and the like.

The invention discloses a method for preparing a novel sheet special for tobacco by replacing wood pulp fibers with cotton fibers. The method comprises the following steps: S1, crushing tobacco leavesinto tobacco powder, and sieving; S2, mixing the tobacco powder with an adhesive to obtain a first mixture; S3, mixing cotton fibers, a dispersing agent and an atomizing agent, heating, uniformly mixing, defibering and dispersing to obtain a second mixture; S4, mixing the first mixture and the second mixture, forming by a roller press, drying and shredding, the heat-not-burn tobacco sheet is obtained, the fiber consumption is small, the filling value of the prepared tobacco sheet is high, the tensile strength is improved, the tobacco sheet is not prone to breakage, exogenous wood gas is reduced, and the sensory quality of a heat-not-burn special sheet product is improved.

The invention discloses an easy-to-clean sanitary ceramic glaze, sanitary ceramic and a preparation method. The glaze comprises a first component glaze and a second component glaze, wherein the secondcomponent glaze is applied to the upper surface of the first component glaze; and the second component glaze is vitreous glaze, and glaze slip of the first component glaze is used for enabling a ceramic unfired green body to form a smooth and flat surface. The surface of the fired sanitary ceramic has excellent anti-fouling performance.

The invention discloses a method for improving glue shortage in open areas of multilayer boards. The method comprises the steps of inner layer line exposing, targeting, browning, riveting, typesettingand pressing. A coating material is used for typesetting; multilayer base materials are overlapped in the open areas and pressed once; silica gel and a PE film are adopted for coating; the PE film ismade of the coating material; due to the use of the coating material, slight fluidity exists, so that the copper wrinkle phenomenon on the surface after pressing is avoided, and the white spot phenomenon in the open areas of the base materials after etching is avoided; and moreover, the overlapping design is not changed, the pressing production capacity is not reduced, the production efficiency is not influenced, a special material is used for production, and the production process is not added.

The present invention discloses a children ampicillin sodium compound entity, wherein the preparation method comprises: (1) adding ampicillin to a mixed solution of dichloromethane and triethylamine, cooling, adding a small amount of a sodium 2-ethylhexanoate solution, increasing the solution temperature, adding the remaining sodium 2-ethylhexanoate solution, carrying out suction filtration, washing, and carrying out vacuum drying to obtain an ampicillin sodium crude product; (2) dissolving the ampicillin sodium crude product in purified water, adding active carbon, carrying out stirring decolorizing, and filtering; (3) adding an extractant to the filtrate under the stirring, transferring and filling into a pressure resistance container, removing air bubbles, carrying out sealing oscillation, carrying out temperature control freezing, and taking out; and (4) carrying out liquid-solid separation, discarding the extractant, adding acetone in a dropwise manner at a temperature of 5 DEG C after the solid melts, stirring at a slow speed, growing the grain, filtering, washing, and carrying out vacuum drying to obtain the ampicillin sodium finished product. The children ampicillin sodium compound entity of the present invention has advantages of good solubility, good clarity, low related substance content, good stability, low toxic-side effect, and the like.

The invention discloses a niobium-titanium-chromium-boron alloyed wear-resistant steel. The niobium-titanium-chromium-boron alloyed wear-resistant steel comprises, by weight, 0.15-0.30% of C, 0.40% orless of Si, 0.60-1.60% of Mn, 0.015% or less of P, 0.0015% of S, 0.010-0.050% of Nb, 0.0025-0.40% of Cr, 0.010-0.040% of Ti, 0.015-0.040% of Als, 0.0025-0.040% of Ni, 0.0010-0.0040% of Cu, 0.0010-0.0050% of Ca, 0.0010-0.0030% of B, 0.006% or less of N, 0.004% or less of O, 0.00020% or less of H, and the balance of iron and inevitable impurities. A preparation method of the niobium-titanium-chromium-boron alloyed wear-resistant steel comprises the following steps: hot metal pretreatment, converter smelting, alloy fine adjustment, LF refining, RH refining, continuous casting, stacking slow cooling, hot rolling, cross cutting and flattening, and heat treatment for obtaining the finished product. The niobium-titanium-chromium-boron alloyed wear-resistant steel is a martensite structure, and has excellent mechanical properties and excellent wear resistance, the Rm value is 1250-1500 MPa, the A50 value is 7-15%, the HBW value is 425-500, the thickness size tolerance is within -0.15 to +0.15mm, and the lowest thickness of a wear-resistant plate produced from the steel can be 2.0 mm.

The invention discloses an environment-friendly water-based antirust agent and a preparation method thereof. The antirust agent comprises the following raw materials in parts by mass: 5-10 parts of glycerin, 20-28 parts of diglycolamine, 4-8 parts of tartaric acid, 2.5-5 parts of itaconic acid, 0.5-1 part of sodium molybdate, 0.5-2 parts of sodium tungstate, 3-6 parts of coco fatty acid diethanol amide 6501, 0.5-1 part of anhydrous sodium carbonate and 39-64 parts of water. The preparation method comprises the steps of raw material mixing, reacting, heating and stirring. The environment-friendly water-based antirust agent disclosed by the invention is good in rust resistance, long in rust-proof life, wide in applicability, free of nitrite or phosphorus, safe to a human body and in line with the requirement of environmental protection.

The invention discloses fragrant artificial leather and a preparation method thereof and relates to the technical field of leather. The fragrant artificial leather comprises a surface layer, wherein a finishing layer is arranged on the surface layer and comprises the components of a controlled-release fragrance finishing agent, a compatilizer and a crosslinking agent, wherein the controlled-release fragrance finishing agent is composed of the components of beta-cyclodextrin and essence, and the compatilizer refers to a water-solubility linear parent high polymer material; the preparation method of the artificial leather comprises the steps of: coating a PVC (Polyvinyl Chloride) or water-based PU surface layer on release paper, and drying the surface layer; coating a PVC (Polyvinyl Chloride) or water-based PU foaming layer on the surface layer, foaming and drying the foaming layer; coating a water-based PU adhesive on the foaming layer, pasting base cloth on the foaming layer with the water-based PU adhesive, drying to obtain an artificial layer; and rolling a layer or multiple layers of water-based PU finishing agent comprising the components of the controlled-release fragrance finishing agent, the compatilizer, the crosslinking agent and a water-based PU finishing agent (water-based polyurethane) on the surface layer of the artificial leather by a three-edition printing machine, and drying to obtain the fragrant artificial leather. The heat resistance and the durability of fragrance volatilization of fragrant artificial leather prepared by the invention are improved, and the fragrance of the fragrant artificial leather is kept above 50% after the fragrant leather is baked for 168h at 100 DEG C.