35results about How to "Low saturated water absorption" patented technology

The invention discloses a solar energy rear panel and a preparation method of the solar energy rear panel. The solar energy rear panel comprises an inner surface layer, a core layer and an outer surface layer from inside to outside. By a mass rate, the inner surface layer is 10%-20%, the core layer is 20%-40%, and the outer surface layer is 40%-60%. The inner surface layer and the outer surface layer are made of polyamide resin, fillings and additive, and the core layer is made of the modified polypropylene resin composition. The modified polypropylene resin composition comprises the following components: 100 parts of polypropylene resin, 5-50 parts of graft polyethylene, 0-2.5 parts of additive and 0-100 parts of fillings. Meanwhile, the invention discloses the novel modified polypropylene resin composition used for the solar energy rear panel. Due to the novel modified polypropylene resin composition, a final product obtained has good low temperature resistance and impact resistance, meanwhile anti-aging performance and especially has performance of humidity resistance and resistance to aging. The solar energy rear panel prepared by the novel modified polypropylene resin composition is better than other rear panels in terms of water absorption, water vapor permeability, and interlaminar peeling and has excellent electrical insulating property. A shrinking rate, hot air aging and insulation property required by the solar energy rear panel are met, and the novel modified polypropylene resin composition can be used for solar energy battery components manufacturing .

The invention discloses a polyamide backplane for a solar energy assembly. The polyamide backplane comprises an inner surface layer, a core layer, and an outer surface layer from the inside to the outside, wherein by mass, the ratio of inner surface layer to the core layer to the outer surface layer is 10-20:60-80:10-20. The inner surface layer and the outer surface layer are made from a polyamide resin, fillers and additives; the core layer is made from a modified polyamide resin composition; and the modified polyamide resin composition comprises a polyamide resin, grafted polyethylene, a polypropylene resin, fillers and additives. The novel polyamide backplane of the present invention is prepared by using coextrusion technology, the final product obtained has excellent adhesion and interlayer peeling force, anti-aging, particularly anti-damp and heat aging performance, and also has low saturation water absorption, low water vapor transmission and excellent electrical insulating properties, and is easy in preparation and low in cost, suitable for industrial production.

The invention discloses a polyamide resin, which is composed of the following repeated unit components: a component A which is 80-99mol/% of a 10T unit formed by decamethylene diamine and terephthalic acid; and a component B which is 1-20mol/% of a 1010 unit formed by decamethylene diamine and sebacic acid, wherein the sebacic acid is substituted by m-phthalic acid or other aliphatic dicarboxylic acid containing 2-14 carbon atoms. A polyamide composition containing the polyamide resin comprises the following components in percentage by weight: 30-99.9% of polyamide resin, 0-60% of reinforcing filler, 0-50% of flame retardant, and 0.1 to 10% of other auxiliary agents. The polyamide resin and the composition composed thereof disclosed by the invention have the advantages that with the water saturated absorptivity lower than 0.8wt%, and the resin and the composition can be applied to situations in which the requirement on water saturated absorptivity is high, such as being applied to an engine oil pipe; with the melting point higher than 260 DEG C, and strong heat resistance, and the resin and the compositions can be applied to situations in which the reflow soldering temperature exceeds 260 DEG C; with the breaking elongation of 14-45%, and the notch impact strength of 6.9-12.0kJ/m2 (23 DEG C), the resin and the composition have high tenacity and can be applied to situations in which the requirement on water saturated absorptivity is high, such as being applied to an engine oil pipe.

Belonging to the technical field of brewing of drinking health care wine, the invention provides a mulberry leaf chrysanthemum wine and a preparation method thereof. Glutinous sorghum, kudzuvine root, mulberry leaf and chrysanthemum are adopted as the raw materials. The preparation method includes: soaking and steaming glutinous sorghum, then adding kudzuvine root, mulberry leaf and chrysanthemum, carrying out saccharification fermentation, then adding a certain amount of primary pulp Baijiu to conduct alcoholic fermentation so as to obtain vinasse liquid; then subjecting the vinasse liquid to press filtering, and taking the clear liquid to prepare raw wine; sterilizing the raw wine, conducting conventional filtration, then regulating the alcohol content and sugar content, and performing subpackaging, thus obtaining the mulberry leaf chrysanthemum wine.

The invention discloses a high-strength and low-water-absorption magnesium oxysulfate cement, which comprises magnesium oxide powder, a magnesium sulfate solution, dried wood fiber, a medium alkali glass fiber cloth and a composite modifier, wherein the composite modifier comprises, by weight (calculated as the total weight of the magnesium oxysulfate cement), 0.2-0.8% of an organic acid and/or anorganic acid salt, 0.2-0.3% of polyvinyl alcohol, 0.2-1.0% of an organic silicon waterproofing agent, 0.2-1.0% of stearate, and 0.2-1.0% of an ethylene-vinyl acetate copolymer emulsion. According tothe present invention, the composite modifier is added on the basis of the original formula of the magnesium oxysulfate cement, such that the final set strength of the magnesium oxysulfate cement is increased by 90-110%, and the saturated water absorption rate is substantially reduced to 8% from 37%; and with the ethylene-vinyl acetate copolymer emulsion, the structure of the magnesium oxysulfatecement is subjected to weather-resistant film forming property protect, such that the strength retention rate of the modified magnesium oxysulfate cement is substantially improved.

The invention provides a reactive flame retardant, a preparation method and application thereof. The composite materials, copper clad laminates and potting materials prepared from the reactive flame retardants have good flame retardance, good heat resistance, water resistance and mechanical properties. The reactive flame retardant provided by the invention has the advantages of low preparation cost, abundant raw material sources and good performance, and has wide application prospects.

The invention discloses precipitation-free, low-water-absorption, halogen-free and flame-retardant reinforced nylon 66 as well as a preparation method and application thereof. The reinforced nylon 66 comprises the following components: nylon 66 resin, a halogen-free flame retardant, a synergist, glass fibers, an anti-precipitation agent, a nucleating agent, a dispersing agent, a lubricating agent and an antioxidant. The preparation method comprises the following steps: adding the nylon 66 resin into a main material scale, adding the halogen-free flame retardant, the synergist, the anti-precipitation agent, the nucleating agent, the dispersant, the lubricant and the antioxidant into a mixer for mixing, adding an auxiliary material scale, adding the glass fibers into a side feeding metering scale, starting a double-screw extruder, sequentially starting a main material metering extruder and an auxiliary material metering extruder, performing discharging, starting a side feeding metering extruder, performing heating, melting, blending and extruding in the double-screw extruder, and performing cooling and granule cutting to obtain high-strength plastic. The reinforced nylon 66 has the advantages of high strength, high flame retardance, no precipitation, low water absorption, stable size, no toxicity and environment friendliness. The method is simple in process, low in cost and suitable for industrial production.

The invention provides a phosphonitrile compound containing a phenolic hydroxyl group, a preparation method and an application thereof. A copper-clad plate which is prepared from the phosphonitrile compound containing the phenolic hydroxyl group has excellent fire resistance, heat resistance, water resistance, caking property, mechanical property and electrical property. The phosphonitrile compound containing the phenolic hydroxyl group is characterized by low compounding cost, simple preparation method, abundant raw material source and wide application prospect.

The invention relates to a silicon-modified phenolic resin adhesive and scrimber prepared from the adhesive. According to the invention, a phenolic resin is modified with methyl silicic acid; in orderto improve the bonding effect of the silicon-modified phenolic resin, an adhesive controllable introduction agent is added; and by using the adhesive controllable introduction technology, the bondingstrength and the water repellency of scrimber prepared from the silicon-modified phenolic resin are greatly improved, and the saturated water absorption rate of the scrimber is reduced.

Provided are a carbon-fiber-reinforced composite material having a low saturated water absorption and excellent TML, CVCM, and heat resistance, a robot hand, and a prepreg suitable therefor. The prepreg includes a CFRP sheet composed of resin composition (a) containing 100 parts by mass of cyanate ester resin (a1) having in its molecule not less than 2 cyanate groups, 0.01 to 0.5 parts by mass of metal coordination catalyst (a2), and 1 to 20 parts by mass of thermoplastic, toughness enhancer (a3), and carbon fibers (b) containing carbon fibers (b1) having a tensile elastic modulus of not lower than 450 GPa. The prepreg is useful for a supporting section of a robot hand.

The invention provides a reactive flame retardant, a preparation method and application thereof. The reactive flame retardant has excellent flame retardance and no fuming, can be applied in compositematerials, resin compositions, epoxy resin compositions, copper clad laminates and other fields, not only can improve the flame retardance and heat resistance of epoxy resin compositions and copper clad laminates, but also can improve the mechanical properties and water resistance of the materials and comprehensively improve the material quality.

The invention provides a reactive flame retardant, a preparation method and application thereof. The copper clad laminates prepared from the reactive flame retardant have good flame retardance, and good heat resistance, water resistance, mechanical and electrical properties. Being used for epoxy resin curing agents, the reactive flame retardant not only can replace conventional curing agents, butalso lower the curing temperature of epoxy resin and realize low temperature curing. The reactive flame retardant provided by the invention has the advantages of low preparation cost, abundant raw material sources and good performance, and has wide application prospects.

The invention discloses a preparation method of orange PA66 with stable color. The orange PA66 is prepared from the following raw materials in parts by weight: 60-80 parts of polyamide PA66; 10 to 20 parts of polyamide PA6; 5 to 10 parts of talcum powder; 5 to 10 parts of maleic anhydride ethylene copolymer; 0.2 part of titanium dioxide; 0.6 part of orange dye; and 0.05 part of pyrene red dye. According to the invention, the color stability of orange nylon is greatly improved, and the color fixing property is greatly improved.