41results about How to "Stable melting point" patented technology

The invention provides a separator characterized by a constitution wherein a porous sheet formed of a thermoplastic polymer having a melting point of 200° C. or lower is incorporating a thin sheet material comprising an organic compound substantially having no stable melting point, which is useful for secondary batteries or capacitors having both the shutting-down function and the high temperature shape stability.

The invention relates to a polylol compound phase-change material and a preparation method thereof. The compound phase-change material takes butantetraol, pentaerythrotol and xylitol powder as raw materials and is prepared through the following steps: carrying out manual grinding, ball milling or sand milling on a mixture of the butantetraol, the pentaerythrotol and the xylitol for 1h to 3h; then heating the mixture at 185 DEG C to 190 DEG C for 3h to 6h until all the powder is completely melted to form transparent liquid; finally, naturally cooling the transparent liquid to form the white and solid polylol compound phase-change material, wherein the mass percent content of the butantetraol is 60 percent to 75 percent, the mass percent content of the pentaerythrotol is 24 percent to 35 percent and the mass percent content of the xylitol is 1 percent to 5 percent. The polylol compound phase-change material has the advantages of high phase-change enthalpy value, small super-cooling degree, stable melting point and the like, and can be used in the fields of solar heat energy storage, industrial residual heat recycling and the like.

The invention relates to an optimized production method of Tri (tribromophenyl) cyanurate. Chlorobenzene is added into a reactor, phenol is added, hydrogen peroxide and bromine are dropwise added into the reactor in a staggering manner, extraction is performed by the aid of the chlorobenzene, a tribromophenol and chlorobenzene mixed liquid is obtained, cyanuric chloride is added into the mixed liquid, an initiating agent CTAB (cetyl trimethyl ammonium bromide), anhydrous sodium carbonate and methylbenzene are added for reaction, and a crude product is transferred to a heating kettle, the product is subjected to pressure reduction and suction filtration in a heating and dissolving state and is finally transferred to a distillation kettle and stirred and crystallized, edulcoration is realized before unit cell arrangement, and the product is obtained. According to the optimized production method of Tri (tribromophenyl) cyanurate, the produced by-products are reduced, the yield is improved, and the product quality is higher.

The invention relates to a preparation method of a low-zirconium mullite cast steel brick, and belongs to the field of preparation of refractory materials. The raw material formula of the low-zirconium mullite cast steel brick provided by the invention comprises electrically smelted mullite, zirconium oxide, Guangxi white clay, andalusite, kyanite and lignin. According to the method provided by the invention, type and grain size of the raw materials are selected to be matched with the sintering temperature and time provided by the invention, so that the prepared low-zirconium mullite cast steel brick has the characteristics of excellent scouring resistance, high temperature resistance, small creep deformation, high compression strength, good thermal stability and the like, and is suitable for being used in large steel ingot casting in nuclear power products.

The invention relates to naftopidil suppository and a preparation method thereof. The naftopidil suppository comprises the following components in part by weight: 10 to 25 parts of naftopidil, 10 to 60 parts of oleaginous substrate, 10 to 60 parts of water-soluble substrate, 1 to 10 parts of surfactant, 10 to 30 parts of hardening agent and 5 to 15 parts of absorbefacient. The suppository is uniformly dispersed, has high dissolution rate and improves the bioavailability and the effectiveness of medicaments.

The invention discloses a low-melting-point packaging film and a low-melting-point packaging bag. The low-melting-point packaging film consists of the following formula in percentage by mass: 90% of ethylene vinyl acetate copolymer, 2% of silicon dioxide and 8% of composite open master batch. According to the low-melting-point packaging film disclosed by the invention, a nucleating agent silicon dioxide is added into the formula, so that a packaging film has very good transparency; moreover, a smelting point is controlled to be 73 +/- 1 DEG C, and is stable and the packaging film is not liable to break. The low-melting-point packaging film is especially suitable for producing the low-melting-point packaging bag with bag width smaller than or equal to 400 mm; and the obtained packaging bag is stable in dimension, is consistent in vertical and horizontal physical property, is high in sealing strength, is not liable to generate deformation, is not liable to damage, is high in transparency, is free of crease, and is excellent in appearance.

A composite sheet having a layer structure of at least two or more layers in which a porous sheet layer of a thermoplastic polymer having at least a melting point of not higher than 200° C. and a nonwoven fabric-like sheet layer containing at least one component of a fibrid, a short fiber or a fibrillated pulp of an organic compound not substantially having a stable melting point are stacked, the composite sheet being able to be used for condensers, capacitors and batteries, exhibiting a sufficient effect against high energy and large outputs and being suitable as a separator for secondary batteries or capacitors having both shutdown function and high-temperature shape stability.

The invention discloses zero-formaldehyde glue film used for synthesizing multilayered solid wood base material, which has the technical proposal that the zero-formaldehyde glue film is prepared by the materials with the following weight parts: 80-90 parts of polyethylene, 5-19 parts of EVA260 resin, 0.1-0.5 parts of low molecular weighted PE wax and 0.1-0.5 parts of titanium dioxide. The glue film has the advantages that as the zero-formaldehyde glue film used for synthesizing multilayered solid wood base material is characterized by stable melting point, the qualification rate of the finished products of multilayered solid wood base material is greatly improved, thus laying the foundation for the development of mass industrialization; as the glue layer is characterized by low water content, the stability of the shapes and sizes of the multilayered solid wood base material is greatly strengthened; as the glue film is characterized by strong adhesion and zero formaldehyde, the multilayered solid wood base material is firmer and more environment-friendly.

A hermetic seal cover capable of inhibiting defects such as voids from generating in sealing a package, and a method of manufacturing the seal cover are provided. The hermetic seal cover comprises: a seal cover main body; a Ni plating layer applied onto a surface of the seal cover main body; and a Au—Sn brazing material layer fusion bonded to a surface of the Ni plating layer, and is characterized by a Ni—Sn ally layer disposed between the Ni plating layer and the Au—Sn brazing material layer. It is preferable if the Ni—Sn alloy layer has a thickness of 0.6-5.0 μm. It is also preferable if Au—Sn brazing material layer has a Sn content of 20.65-23.5 wt %.

The invention discloses an automatic bromine adding device for synthesizing tetrabromobisphenol A and a control method thereof, relating to the field of chemical synthesis equipment. The automatic bromine adding device comprises a bromine discharge device, a control metering device connected with the bromine discharge device through a pipeline to feed materials into a reaction device, and an automatic adjusting device, wherein the reaction device is externally provided with a cooling device. The automatic bromine adding device realizes segmentation control, can automatically adjust the amountof bromine added according to the temperature of a reaction still, and can control the flow rate of brine, the weight of bromine added and other data as well as a feeding sequence to ensure a more stable synthesis reaction, thereby improving product purity, lowering labor intensity of workers and improving a safety factor of production.

The invention relates to a floor manufacturing method, in particular to a carbonized floor manufacturing method. The carbonized floor manufacturing method comprises the following steps: (1) prior period processing: carbonizing a floor to form a carbonized floor and keeping the temperature of the carbonized floor between 70-120 DEG C; (2) immersing a wax: immersing the carbonized floor into melting paraffin liquid and taking out the carbonized floor after 5-30 seconds; (3) finished product: cooling the carbonized floor naturally after being immersed in the wax. In the invention, the carbonized floor with higher temperature is immersed in the wax directly, the paraffin is absorbed completely through a slit on the surface of the carbonized floor, and sanding and archaizing the obtained carbonized floor by the method, painting and adding other industrial chemical on the carbonized floor are not needed, therefore, the carbonized floor has the characteristics of crack resistance, good performance of damaged by worm, environmental protection and long-term maintenance of brightness of the floor.

The invention discloses a low-melting-point packing film. The low-melting-point packing film is prepared from, by mass, 65% of vinyl acetate copolymer, 2% of silicon dioxide, 2% of barium sulphate (precipitating method), 23% of low-density polyethylene and 8% of compound open master batch. The nucleating agent silicon dioxide is added in the formula, so that the packing film has good transparency. In addition, a melting point is controlled to be 90 +/-1 DEG C and is stable, and the packing film does not easily break. The low-melting-point packing film is especially suitable for a low-melting-point packing bag with the production bag width smaller than or equal to 400 mm, the obtained packing bag is stable in size, convenient in vertical and horizontal physical property and high in sealing strength, does not easily deform, does not easily break and is high in transparency, free of wrinkles and excellent in appearance.

The invention discloses a low-melting-point packaging film and application thereof to preparation of a packaging bag. A formula of the low-melting-point packaging film comprises the following raw materials in percentage by mass: 90 percent of ethylene vinyl acetate copolymer, 2 percent of silicon dioxide and 8 percent of compound openability master batch. In the formula, the silicon dioxide serving as a nucleating agent is added, so that the packaging film has high transparency; moreover, the melting point is controlled at 73+/-1 DEG C, so that the low-melting-point packaging film is stable in melting point, and is prevented from being damaged. The low-melting-point packaging film is particularly suitable for producing a low-melting-point packaging bag which is less than or equal to 400mm in bag width; the obtained packaging bag is stable in size, is consistent in longitudinal and horizontal physical properties, has high sealing strength, high transparency and superior appearance, is prevented from being deformed or damaged easily, and is free from wrinkles.

The invention discloses a multifunctional composite modificator for cast steel. The modificator is prepared from the following components in percentage by mass: 17-23 percent of Si3N4, 15-25 percent of AlN, 5-9 percent of Fe-SiRE, 14-18 percent of Al, 5-7 percent of Mg, 6-10 percent of Nb, 6-10 percent of V and 14-20 percent of CaO. The multifunctional composite modificator can solve the problemsof thick crystal grain, high content of phosphor, low toughness and low abrasion resistance in the cast steel producing process, so that the material performance is improved, and the material utilization can be improved.

The invention discloses non-reactive casting powder for a fluoride-free high-aluminum steel continuous casting crystallizer, and belongs to the technical field of metallurgical engineering. The fluoride-free high-aluminum steel continuous casting crystallizer non-reactive casting powder comprises the following components in percentage by mass: 20 to 35 percent of CaO, 15 to 35 percent of Al2O3, 1 to 10 percent of SiO2, 7 to 15 percent of BaO, 7 to 15 percent of B2O3, 10 to 17 percent of Na2O + Li2O, 2 to 10 percent of C, 1 to 7 percent of MnO, 1 to 7 percent of MgO and the balance of inevitable impurities. Compared with the traditional casting powder, the casting powder disclosed by the invention is not added with CaF2, so that the problem of large fluctuation of components caused by components in the aluminum reduction casting powder in the continuous casting process of high-aluminum steel, especially the performance of the casting powder, and the pollution to air, the harm to human bodies and the damage to continuous casting equipment caused by volatilization of F-containing gas in the continuous casting process are avoided.

The invention relates to a composite modifier, prepared through mixed loading of aluminum-antimony-copper-ferrosilicon alloy and nanometer magnesium oxide-boron nitride, for gray pig iron and a preparation method of the composite modifier. The modifier is prepared from the following raw materials in parts by weight: 1-2 parts of nanometer magnesium oxide, 2-3 parts of nanometer boron nitride, 1-3 parts of aluminum powder, 0.8-1 parts of antimony powder, 3-5 parts of expansible graphite powder, 3-4 parts of copper powder, 4-6 parts of silicon iron powder with 45% of silicon content, 0.2-0.3 part of aluminum-magnesium silicate, 20-25 parts of ethanol water at the concentration of 5-8%, and 0.4-0.5 part of an additive. The nano-powder and the manganese-molybdenum-copper-ferrosilicon alloy powder loaded on the expansible graphite powder are mutually bonded and loaded to prepare the composite modifier with stable properties, the effect of promoting generation of crystal nucleus and refining the crystal nucleus is achieved, the composite alloyed powder optimizes the matrix structure, refines the graphite body and improves the strength, the modifier is rapidly melted after being added into the molten iron, the graphitization process is promoted, the comprehensive mechanical property of the gray pig iron is effectively improved, and compared with the traditional modifier, the composite modifier is more convenient to use, and the production cost is also reduced.