37results about How to "Reasonable hardness" patented technology

The present invention provides two-component polyurethane compositions that are substantially free of VOCs and comprising, as one component, polyisocyanate compositions and, as a second component, a polyol which is chosen from a cycloaliphatic diol or polyol having a molecular weight of from 100 to 500 and containing one or more 4 to 7 member aliphatic ring and an oligomeric diol or polyol comprising the condensation reaction product of from 30 wt. % to 78 wt. %, based on the total weight of reactants used to make the oligomer, and an acrylic or vinyl emulsion polymer.

A carrier for electrophotographic developer that comprises a particle of core material and a coating layer that coats the particle of core material, wherein a toner and a carrier are supplied into a developing device where a toner and a carrier being contained, and the surplus developer within the developing device is discharged, a coating layer on at least one of the supplied carrier and the carrier contained in the developing device comprises a white conductive fine particle that includes tin dioxide and indium oxide on a base material.

The invention relates to a system and a method for rigid wire clothing quenching using YAG laser. The system includes: mounting beam enlarging lens, wholly reflective lens according to the YAG laser light path, reflective light entering into light guiding cartridge through light hole of work platform, other port of light guiding cartridge is connected with adjusting ring, adjusting ring is connected with focusing head, upper work platform is fixed on the low work platform, low work platform is fixed to ground, positioning device and cooling box is fixed to the low work platform, focusing head is in between, rigid wire clothing is fixing to movable mechanism of positioning device, the other end of rigid wire clothing pass through cooling box, controlling cabinet is mounted to ground, laser power resource and other bang-bang circuit is mounted in the controlling cabinet. Switching the laser power, YAG laser beam exported from laser is enlarged through beam enlarging lens, reflected by wholly reflective lens, focused by focusing lens in teeth of rigid wire clothing, form a high energy density light spot. That light spot energy is absorbed by teeth means thus the rigid wire clothing is quenched.

The invention discloses a submerged arc welding flux for welding SA-508Gr.3Cl.1 steel of third-generation nuclear power equipment and a preparation method thereof. The submerged arc welding flux comprises the following components in parts by weight: 8-15 parts of SiO2 (silicon dioxide), 20-30 parts of MgO (magnesium oxide), 20-30 parts of CaF2 (calcium fluoride), 20-30 parts of Al2O3 (aluminum oxide), 6-10 parts of CaO (calcium oxide), 2-4 parts of MnO2 (manganese dioxide), 0.3-1 parts of BaO (barium oxide), 1-2 parts of rare earth oxides, 0.014-0.016 part of S (sulfur), 0.013-0.015 part of P (phosphor), and 22-24 parts of water glass. Compared with the prior art, the submerged arc welding flux has the advantages that the welding technological property is excellent, the slag removal property is excellent, the forming appearance is attractive, and the mechanical property is more excellent.

The invention relates to the field of composite materials for denture, in particular to a zirconium oxide / resin bionic composite material for the denture and a preparation method thereof. The zirconium oxide / resin bionic composite material is prepared from the following components of 20vol% to 97vol% of zirconium oxide and biocompatible resin, and is of a bionic lamellar structure, a brick-wall structure or a crossed laminating structure in a microscopic way. The zirconium oxide / resin bionic composite material has the advantages that the oriented porous blank with the lamellar structure is obtained by slurry preparation, freezing-casting and vacuum freeze-drying, and is compressed along the lamellar structure direction to form the crossed laminating structure; the zirconium oxide skeletonwith the lamellar structure or crossing laminating structure can be prepared by removing organic matters and sintering, and the zirconium oxide skeleton of the brick-wall structure can be obtained through the vertical compression of the lamellar structure skeleton and the secondary sintering; the surface is subjected to surface modifying and liquid resin monomer permeating, and the resin is polymerized, so as to obtain the zirconium oxide / resin bionic composite material for the denture with the bionic structure; the prepared zirconium oxide / resin bionic composite material is mainly used as thedenture, so as to reduce the abrasion to the normal teeth of a human body by the denture.

The reinforcing air intake valve for diesel engine of diesel locomotive is manufactured with reinforced martensite steel comprising C 0.38-0.50 wt%, Si 2.50-3.75 wt%, Mn less than or equal to 0.80 wt%, Ni less than or equal to 0.50, Cr 8.5-11.0 wt%, S less than or equal to 0.002 wt%, P less than or equal to 0.003 wt%, Mo 0.2-0.3 wt% other than Fe. The gate material has good performance and machinability, stable quality and high performance / cost ratio. The gate after heat treatment has high strength, excellent comprehensive performance, high roughness and good fitting with plastic.

The invention relates to an adhesive for cutting wafer. The adhesive comprises a component A and a component B at a weight part ratio of (25-40) to (17-31), wherein the component A comprises the following components in parts by weight: 80-100 parts of epoxy resin, 40-50 parts of polyvinyl alcohol, 15-30 parts of sodium hydrogen sulfite, 10-25 parts of precipitated barium sulphate, 1-5 parts of crylic acid, 2-10 parts of ethanol and 1.5-7.5 parts of 2-ethylhexyl epoxystearate; and the component B comprises the following components in parts by weight: 40-50 parts of nitrile rubber, 10-12.5 parts of butyl acrylate, 1-5 parts of a plasticizer and 0.1-2 parts of a coupling reagent. The adhesive has the characteristics of being easy to degum, relatively high in hardness and good in tenacity, and is applicable to cutting thin wafers; and meanwhile, a chip shell and a bright side are reduced, so that the good-grade rate is improved.

The invention discloses a polishing solution for stainless steel processing, and relates to a polishing solution. The polishing solution for stainless steel processing is specifically prepared from deionized water, diamond, boron carbide, silicon carbide, zirconium oxide, lanthanum oxide, scandium oxide, hydrotalcite, diethanol amine, pentaerythritol, 1,2-diethoxyethane, urotropin, polyoxyethylene poly-oxypropylene pentaerythrilol ether, sodium dodecyl benzene sulfonate, cetyl sodium sulfate and glycerol. The finally prepared polishing solution can complete polishing of stainless steel rapidly and efficiently, the processing quality is high and stable, the defective rate is decreased, and the polishing solution has good application and promotion value.

The present invention disclosed a buried arc welded welding for welding ultra -low -temperature high -manganese steel, which is made from the following components: SIO 2 3‑6 weight, MGO 30 50 weight, Al 2 O 3 30 40 weight, CAF 2 10‑20 weight, TIO 2 3‑10 weight portion, 0 <fE 2 O 3 ≤3.0 weight portion, 0

The invention discloses a submerged-arc flux for low-temperature impact of Cr-Mo heat-resistant steel and narrow-gap submerged-arc welding, and relates to the welding field. The flux comprises the following ingredients by mass percent, SiO28-20%; MgO20-40%; A12O315-30%; sigmaCaO15-28%; MnO0.5-5%; Na2O0.5-2%; K2O0.5-2%; TiO20.5-3%; Fe2O3< / =3.0%; S< / =0.030%; P< / =0.030%. The flux is special for the narrow-gap welding and the submerged-arc welding on the low-temperature impact of the Cr-Mo heat-resistant steel.