278results about How to "Not easy to foam" patented technology

The present invention provides a stainless steel zipper manufactured by metal injection molding. The stainless steel zipper comprises a zipper fastener 1, a pull ring 2, a pull piece 3 and pull teeth 4. The stainless steel zipper consists of stainless steel powder and at least one binder. The preparation method of the stainless steel zipper manufactured by metal injection molding comprises the following steps: 1, designing a mold; 2, selecting the metal powder; 3, selecting the binder; 4, preparing and compounding to uniform feeding material; 5, after injecting into a mold for heating at high temperature, cooling and forming; 6, cooling the binder for forming; and 7, sintering and forming the finished product. The stainless steel zipper manufactured by metal injection according to the invention has the advantages of suitability for manufacturing the zipper with random size, achieving the carving of complicated shape and three-dimensional forming characteristic, reducing the wastage, increasing the product performance, having fine surface, along with no easy generation of blistering, no oxidation, and no requirement of subsequent processing and auxiliary device.

The invention relates to a high-sinking-resistance transparent primer and a preparation method thereof. The high-sinking-resistance transparent primer is particularly suitable for application on a wood substrate and especially suitable for application on a substrate with deeper wood-grain guide tubes. The primer is prepared from a main paint, a curing agent and a diluter in a mass ratio of 1:0.5:(0.3-1):0.5:0.7. The main paint is prepared from the following raw materials in parts by mass: 55-70 parts of small-oil-length alkyd resin, 5-15 parts of castor oil modified alkyd resin, 3-10 parts of zinc stearate, 0-30 parts of talcum powder, 0.5-1 part of anti-settling agent, 0.3-1 part of defoamer, 0.2-0.5 part of leveling agent, 0.1-0.5 part of wetting and dispersing agent, 0.1-0.3 part of drier and 5-15 parts of environment-friendly mixed solvent. The primer can be well combined with the substrate after being applied, and has excellent properties in the aspect of wood grain / guide tube filling. After the primer is placed for a long time, the paint film of the finish paint can not shrink, and can not generate the phenomenon of sinking.

The invention discloses an efficient composite germicide for a circulating water system, which is composed of the following components: 15-18% of glutaraldehyde, 42-49% of quaternary phosphonium, 11-17% of isothiazolinone, 20-30% of deionized water, and 5-8% of dithiocyano-methane. The germicide has an extremely excellent bactericidal effect, can be used in circulating cooling water under high pH value conditions, has a good killing effect on heterotrophic bacteria, sulfate reducing bacteria and algae, and especially has an obvious killing effect on heterotrophic bacteria; and the germicide is high in killing speed, strong in killing force, and low in toxicity.

The invention provides a method for producing pleocidin by adopting saccharopolyspora spinosa through fermentation. According to the method, saccharopolyspora spinosa Z68 is adopted as a fermentation strain, an improved fermentation medium is adopted, fermentation cultivation is carried out under the conditions that the temperature is 26-30 DEG C, the rotation speed is 150-220 rpm, the compression-ventilation ratio is 1 to (0.3-0.7), the pot pressure is 0.03-0.04 MPa, and the dissolved oxygen is controlled to be 40% or above, and pleocidin is extracted from the fermentation liquid. According to the method provided by the invention, staring from the physicochemical properties of the fermentation medium of saccharopolyspora spinosa, the fermentation medium with stable yield of pleocidin and little foaming amount, and a material supplementation method are provided. The soybean meal / soybean cake powder in the fermentation medium are replaced by high-temperature soybean cake powder, and the experiment proves that in the fermentation process, the high-temperature soybean cake powder has small possibility of foaming compared with the soybean meal and low-temperature soybean cake powder, while part of fat not available in the high-temperature soybean cake powder but available in the soybean meal and the low-temperature soybean cake powder can be added from the outside in the middle and later periods of fermentation, and the adding at the time can achieve the effect of eliminating foams and solve the problem that the carbon source is insufficient in the later period.

The invention discloses a preparation method of a ceramic crucible coating layer for ingoting polysilicon, which comprises the steps of putting 26%-49% of deionized water into a stirrer, heating the water to be 80-90DEG C, and pouring 50%-70% of silicon nitride into the stirrer to be evenly stirred; slowly pouring 0.5%-4% of PVA (polyvinyl alcohol) into the stirrer, stirring and ultrasonically shaking for more than 30min, and abundantly stirring to prepare suspension liquid; brushing the stirred suspension liquid onto the inner wall of a ceramic crucible, wherein the depth of the coating layer is 200-400mum; and putting the brushed ceramic crucible into an oven for sintering, rising the temperature of the ceramic crucible to be 1050-1100 DEG C after 8-10h, keeping the temperature for 2-4h, and cooling to be at a room temperature with a furnace. The coating layer and the surface of the crucible has high adsorption capacity, and the coating layer is hard to bubble, fall off and strip off, so that the furnace bonding and the ingot cracking of a silicon ingot are reduced, the pollution of impurities in the crucible to the silicon ingot is effectively reduced, and the demolding effect of the silicon ingot is improved.

The invention belongs to the field of lignocellulose enzymatic hydrolysis, and discloses a method for improving cellulose enzymatic hydrolysis and saccharification yield by using a mixture of lignin sulfonate and straight-chain alcohol as an enzymatic hydrolysis auxiliary agent. The method comprises the specific steps that: cellulose is dispersed in a buffering solution; the mixture of lignin sulfonate and straight-chain alcohol is added; 5-20 FPU / g of cellulase calculated according to glucan content in cellulose is added; a reaction is allowed for 48-96h under a temperature of 45-60 DEG C, such that a saccharide compound hydrolysate is obtained. According to the invention, through the addition of the mixture of lignin sulfonate and straight-chain alcohol, cellulose enzymatic hydrolysis and saccharification yield can be improved by 15.1-24.6%.

The invention discloses an intermediate pressure level low-smoke zero-halogen flame-retardant silicon rubber insulating material and a manufacturing process thereof. The material is characterized by being prepared from the following raw materials in parts by weight: 35-45 parts of methyl vinyl organic silicon rubber, 15-25 parts of white carbon black, 1.5-3 parts of nano-montmorillonite, 10-25 parts of aluminum hydroxide, 10-18 parts of magnesium hydroxide, 0.4-0.8 part of an across-linking agent, 2-5.8 parts of a structure control agent, 2-4 parts of iron oxide red and 0.80-1.5 parts of a coupling agent. The insulating material disclosed by the invention not only can satisfy the requirements on heat resistance, high electrical insulating performance and the like of an intermediate pressure level cable insulating material, a cable accessory and the like, but also has high mechanical strength, so that the novel application field of the silicon rubber material is opened up.

A pressure-sensitive adhesive film which is a stretched polypropylene-based resin film comprising a laminate consisting of a pressure-sensitive adhesive layer and a release layer provided on the surface of a base layer of a polypropylene-based resin, characterized in that the average surface roughness (SRa) of the surface of the above-described release layer is 0.200 [mu]m or less, the average surface layer (SRa) of the surface of the pressure-sensitive adhesive layer of the above-described film is 0.030 [mu]m or less, the contact area with the adherent, which is defined in the description, is 90% or more but not more than 100%, and the film haze falls within the range of 1 to 40%. This pressure-sensitive adhesive film suffers from little blocking and shows a good processing suitability even after storing in a rolled state. Further, this film shows little bubbling and a high transparency after bonding to an adherend and processing at a high temperature.

The invention belongs to the field of washing products, and particularly discloses fruit and vegetable washing salt for removing pesticide residues. The washing salt is prepared from the following raw materials: edible salt, shell powder, sodium percarbonate, sodium benzoate, hydroxypropyl methyl cellulose, ethanol solution, citric acid, orange peels, mangnolia, bamboo leaves, cortex dictamni, lonicera japonica, camellia, roots of japanese banana, rhodiola rosea, lysimachia christinae hance, loofah sponge, sodium alkyl benzene sulfonate, sodium lignin sulfonate, fatty acid diethanol amide, polyhexamethylene guanidine and deionized water. The fruit and vegetable washing salt is prepared from edible salt, multiple traditional Chinese medicinal herbs and other raw materials, which are mixed to achieve the synergized or resisted effect, so that the effect of removing pesticide residues can be improved, pesticide residue and stains on the surface of melons, fruits and vegetables can be effectively cleaned, nutrition of fruits and vegetables cannot be destroyed, and the requirement of people for washing fruits and vegetables can be met.

The invention provides a high-hardness and quick-drying water-based two-component filling clear primer. The high-hardness and quick-drying water-based two-component filling clear primer comprises a component A and a component B which are uniformly mixed according to an equivalent ratio of n (-NCO) to n (-OH) of 1.5-1.8, wherein the component A is prepared from the following components in percentage by weight: 75.0 to 80.0 percent of water-based acrylic emulsion; 0.8%-1.0% of an antifoaming agent, 4.0%-6.0% of a coalescing agent, 3.0%-6.0% of filling powder, 0.2%-0.3% of a wetting leveling agent, 0.4%-0.6% of an anti-settling agent, 0.1%-0.5% of a thickener, 2.0%-5.0% of a polishing agent and 2.0%-10.0% of water. And the component B is prepared from the following components in percentage byweight: 30%-40% of modified IPDI polyisocyanate and 60%-70% of modified HDI polyisocyanate. The -OH in the primer emulsion component and -NCO in the curing agent component are subjected to a deep cross-linking reaction to generate a urethane bond, the coating film is compact, and the hardness of the paint film is improved. In addition, the minimum film forming temperature MFFT is larger than or equal to 30 DEG C, the high drying speed is provided for a product system, and the requirement for changing oil into water in solid wood paint can be met; the invention also provides a preparation method of the water-based two-component filling clear primer.