4results about How to "Loose tissue" patented technology

The invention relates to a preparation method and application of a binary formula Dai pottery pug. The preparation method comprises the following steps: taking Dai pottery clay in the HongRiver basin, Wuhua soil in the HongRiver county and charcoal dust, and exposing and weathering the Dai pottery clay and the Wuhua soil for at least three months; the mass content of SiO2 in the Dai clay in the HongRiver basin is not less than 50%, the mass content of Al2O3 is not less than 15%, the mass content of Fe2O3 is not less than 10%, and the ignition loss is less than 10%; the content of SiO2 in the Wuhua soil in the Honghe county is 72%-82%, the content of Al2O3 is 9%-12%, and the content of Fe2O3 is 3%-5%; the preparation method comprises the following steps: adding water into the Dai pottery clay and the Wuhua soil according to the mass ratio of the Dai pottery clay to the Wuhua soil to the charcoal powder of (100-120): (40-50): (8-10), fully soaking, then carrying out ball milling, sieving slurry, then adding the charcoal powder, uniformly stirring, squeezing mud, draining, pugging and exhausting. According to the invention, the throwing and compression molding performances of the Dai pottery clay can be improved, the sintering temperature and the compactness and strength of the structure of the Dai pottery clay can be improved, and the burn out rate can be reduced.

The invention relates to the field of compressor valve plates, in particular to a compressor valve plate end face grinding special resin grinding wheel and a preparation method thereof.The compressor valve plate end face grinding special resin grinding wheel comprises, by weight, 100 parts of grinding materials, 4-6 parts of phenolic resin liquid, 10-15 parts of phenolic resin powder, 1-2 parts of polyvinyl butyral resin, 2-3 parts of gypsum powder, 1-2 parts of potassium fluoborate and 1-2 parts of zinc sulfide. Wherein the grinding material is a large-particle corundum micro-powder agglomerated grinding material prepared by utilizing a ceramic bonding agent. The large-particle corundum micro-powder aggregate prepared by the ceramic bond is used as the abrasive material, the abrasive material has a porous structure, high bonding strength and good self-sharpening performance, the resin grinding wheel prepared by the abrasive material has the advantages of loose structure, high mechanical strength, good retentivity and the like, and the abrasive material has the good self-sharpening performance on the premise that the roughness is guaranteed. The grinding efficiency is high, the heat dissipation performance is good, the single-time feed amount is large, finishing is not needed, the grinding procedures can be reduced, and the workpiece surface precision is guaranteed.

A method for preparing a binary formula for Dai pottery clay and its application is disclosed. The method involves taking Dai pottery clay from the Honghe River basin, five-colored clay from Honghe County, and charcoal powder. The Dai pottery clay and five-colored clay are sun-dried and weathered for at least three months. The Dai pottery clay from the Honghe River basin has a SiO2 content of not less than 50%, an Al2O3 content of not less than 15%, an Fe2O3 content of not less than 10%, and a loss on ignition of less than 10%. The five-colored clay from Honghe County has a SiO2 content of 72-82%, an Al2O3 content of 9-12%, and an Fe2O3 content of 3-5%. The method involves soaking the Dai pottery clay and five-colored clay in water until fully saturated, then ball-milling them. The slurry is sieved, and then charcoal powder is added. After stirring evenly, the clay is pressed to drain water and then kneaded to remove air. This invention can improve the throwing and molding performance of Dai pottery clay, increase the sintering temperature and the density and strength of its structure, and reduce the burn-off rate.

The invention provides a preparation method for improving the biological activity of Grifola frondosa polysaccharide and a product thereof. The preparation method comprises the following steps: (1) crushing dried Grifola frondosa fruiting bodies to obtain Grifola frondosa fruiting body crushed material; adding ethanol to soak, filtering and vacuum drying; (2) subjecting the crushed material to nitrogen explosion treatment; (3) adding water to soak, then heating to 45-50 DEG C, stirring and ultrasonically treating, filtering, and collecting filtrate; (4) subjecting the filtrate to reduced pressure concentration treatment at 45-50 DEG C to obtain a concentrated solution; (5) adding ethanol to perform alcohol precipitation; centrifugal treatment, removing the supernatant to obtain a precipitate, washing; and vacuum freeze drying to obtain Grifola frondosa polysaccharide. The raw materials used in the invention are simple, and the prepared Grifola frondosa polysaccharide has high biological activity and a high extraction rate.