757results about How to "Low moisture absorption" patented technology

The invention discloses a continuous long carbon fiber reinforced thermoplastic nanocomposite and a preparation method and application thereof. The nanocomposite comprises, by weight, 40 to 70% of long carbon fiber (LCF), 25 to 40% of thermoplastic resin, 3 to 15% of a filler and 2 to 5% of an auxiliary agent; and an isostatic pressing fusion resin impregnation compound process is employed to prepare the multi-component blend composite with a multi-phase structural characteristic. In a processed and shaped part product, the reservation length of LCF is 0.5 to 15 mm and meets the requirement that normal distribution is no less than 80%. The nanocomposite provided by the invention has excellent performances and characteristics like small specific gravity, high strength, good toughness, good thermal and heat conductivity, wear resistance, corrosion resistance, fatigue resistance, simple production technology and low processing cost of the product.

The invention provides a production method of a stable enhanced type solid wood profile improved by a wood carbonization and acetylation process, which belongs woodwork production technique. The production method comprises the following steps of: a, drying treatment, wherein the wood moisture content is reduced to be as low as 5.0 to 8.0 percent, the moisture content deviation in the wood thickness is less than 2.0 percent, and the wood internal residual stress is less than 2.0 percent; b, carbonizing treatment; c, acetylation treatment; and d, equalization treatment. The invention also discloses a stable enhanced type solid wood profile prepared by the production method. The solid wood profile prepared by the method is stable, has high corrosion resistance and weathering resistance, high output, long product service life and wide utilization ways, is favorable for realizing flow line production, and is convenient for industrialization.

The invention discloses a spherical silicon dioxide / polyimide composite film and a method for making the same as well as an application. The method for making the spherical silicon dioxide / polyimide composite film comprises the following steps that: 1) spherical silicon dioxide particles are scattered into an organic solvent evenly to obtain the spherical silicon dioxide particle suspension liquid; 2) a surface treatment agent, a molecular weight modifying agent, an auxiliary adhesive, a flatting agent and aromatic series diamine are dissolved inside the spherical silicon dioxide particle suspension liquid; organic dicarboxylic anhydride is added to be stirred in order to obtain a spherical silicon dioxide / polyamide acid mixing resin solution; 3) the mixing resin solution is coated on the surface of a flat substrate and is heated up to make the solvent volatilize and complete the imide reaction to obtain the spherical silicon dioxide / polyimide composite film. The spherical silicon dioxide / polyimide composite film has good mechanical property, good corona resistance, low thermal coefficient of expansion and low moisture absorption ratio, and has important application value in an insulating system of a frequency conversion speed motor.

The invention provides a cigarette core material for heating incombustible cigarettes. The cigarette core material is prepared from the following components in percentage by weight: 10-50% of tobaccofiber and tobacco powder, 5-30% of wood pulp fibers, 5-30% of one or more of hemp fibers, bamboo fibers, soybean fibers, cocoon fibers, cotton fibers, polylactic acid fibers and modified cellulose fibers, 10-50% of tobacco essence, 10-30% of smoke producing agent, 1-10% of heat conduction material, 1-10% of phase change absorption material and 1-20% of paper coating component which is selected from one or more of a hydrophobic material, a microcapsule suspension and an essence suspension containing the tobacco powder. According to the cigarette core material, the heat conduction material is added, so that the heat can be uniformly conducted; the cigarette core paper is uniformly heated in the heating process; in addition, the phase change absorption material is used and is capable of achieving phase change and absorbing heat under the heated condition so as to prevent the cigarette core material paper from being locally overheated in the heating process.

The invention discloses a weatherable irradiation crosslinking cable material. Raw materials of the cable material comprise the following components, by weight, 100 parts of a thermoplastic elastomer, 0-35 parts of an engineering plastic, 2-80 parts of a polyolefin, 0.2-8 parts of a crosslinking agent, and 2-150 parts of a fire retardant. According to the invention, problems existing in manufacturing of cable materials from polyester copolymers are solved through reasonably designing the components and the ratio of the components, and utilizing the interaction of the components; and the prepared cable sheath material has the advantages of good processing fluidity, good mechanical properties, oil resistance, high temperature resistance, excellent hot extensibility and superior low temperature resistance after irradiation crosslinking, and substantial reduction of the material cost through the addition of the polyolefin interface phase solvent.

The invention discloses a MEMS device packaging method based on LCP multilayer stacking technology, which is characterized in that the MEMS device is obtained by sputtering, photolithography, etching, electroplating and other processes on a double-sided polished silicon substrate, and at the same time Form silicon grooves that are easy to lead out and have accurate alignment; based on the LCP multilayer stacking technology, on the multilayer LCP substrate, the cap part of the device package is obtained through laser scribing, alignment, lamination and other processes; the device and the cap Package without assistance, high-precision integration, and obtain MEMS devices with low loss and good airtightness. The MEMS device of the invention has the advantages of low loss, high isolation and good airtightness. This method can better provide packaging protection for MEMS devices with movable parts, and is especially suitable for miniaturization applications of microwave, millimeter wave communication, radar and other systems / subsystems, and belongs to the realization of miniaturization, high performance microwave communication, radar systems / The key technology of the subsystem.

The invention relates to a manufacturing method of an electronic-grade polyimide film with low linear expansion coefficient. The method is characterized by comprising the steps that (1) the step-by-step condensation polymerization technology or the blending compounding technology is used for obtaining two or more polyamide acid glue solutions comprising rigid structures and soft structures at the same time and are different in rigidity and softness; (2) ultrafine inorganic whiskers, like zinc oxide whiskers, silicon carbide whiskers and zirconium tungstate whiskers, which are subjected to surface organic modification already and / or nanoparticle materials are smashed and cavitated through high-energy-density supersonic waves, and then the functional fillers are compounded with polybasic polyamide acid in an in-situ micro-nano mode; (3) the compounded glue solutions are subjected to filtration, vacuum defoamation, extrusion casting filming, chemical amidization or thermal amidization, infrared complete amidization, high-temperature thermal forming processing, corona processing and a reeling process, and therefore the electronic-grade polyimide film with the thickness being 7.5-125 micrometers, the linear expansion coefficient being 5-18ppm / DEG C, and good physical mechanical performance is obtained.

The invention discloses enhanced high-temperature heat treated wood and a manufacturing method thereof. The manufacturing method comprises the following steps that 1, high-temperature heat treatment is performed, wherein man-made forest wood serves as raw materials, and high-temperature heat treatment is performed on the man-made forest wood to obtain heat treated wood; 2, impregnation enhancing treatment is performed, wherein the heat treated wood obtained by the step 1 is impregnated in resin adhesives to obtain impregnated wood; 3, solidification forming treatment is performed, wherein solidification forming treatment is performed on the impregnated wood obtained by the step 2 to obtain the enhanced high-temperature heat treated wood. According to the manufacturing method, not only can the mechanical properties of the wood be improved, but also the size stability of the wood can be improved, green and environmental protection are achieved, and the prepared enhanced high-temperature heat treated wood takes the man-made forest wood as the raw materials and is high in mechanical strength and good in size stability.

The invention discloses a wood-plastic composite for walls, comprising the following components by mass: 68-78 parts of wood flour, 20-25 parts of PE plastics, 2-4 parts of coupling agents, 0.1-0.2 part of antioxidant and 2-5 parts of precipitated calcium carbonate-silicone oil. The invention also discloses a preparation method of the wood-plastic composite for walls. The quantity of the PE plastics in the formula of the wood-plastic composite is 20-25%, which is half as much as 50% of plastics in the common wood-plastic material, thus greatly saving the plastics and lowering the production cost, meanwhile, the prepared wood-plastic composite has the characteristics of high strength, creep resistance, good processability, low moisture rate and high weatherability.

The invention is concerned with water-solubility salt core for high-pressure molding made of metal halides and ceramic whisker. The quality ratio of metal halides and ceramic whisker is 90 to 99:1 to 10, and the optimization is 91 to 98:2 to 9. The water-solubility salt core for high-pressure molding (press molding, extrusion molding) bases on the light alloy hardware with complicated inner cavity with equal or over 17 Mpa bending strength and the collapsibility time is less then a hour, the contract ratio of bulk is less than 12.30 percent and the moisture absorption is less than 0.05 percent. The bending strength of salt core is high and the capability for high temperature and absorption of moisture is well with low contract ratio and low cost to press molding or extrusion molding of light alloy hardware with complicated inner cavity.

The invention relates to efficient halogen-free anti-inflaming polyurethane hard foam and a preparation method thereof. The foam contains 40 to 50 % of polymer MDI, 30 to 40 % of polyether polyalcohol, 1 to 5 % of foam stabilizer, 0.1 to 5 % of foaming agent, 1 to 10 % of ternary cladding microencapsulation red phosphorus, 0 to 10 % of dimethyl methyl phosphonate (DMMP), 0 to 10 % of 2,4,6-triphosphoric diethyl ester-1,3,5-triazine (CNCTP), according to weight percentage. The preparation method comprises the steps of: proportionally and uniformly mixing the ternary cladding microencapsulation red phosphorus, the dimethyl methyl phosphonate (DMMP) or the 2,4,6-triphosphoric diethyl ester-1,3,5-triazine (CNCTP), the foam stabilizer, the foaming agent and the polyether polyalcohol at room temperature, rapidly mixing with polymer MDI, and then foaming. The invention has the advantages of small moisture absorption property, high anti-inflaming property, small influence on mechanical property, and the like.

A liquid epoxy material for packaging high-density microelectronic devices is prepared from two kinds of liquid epoxy resin, acid anhydride as solidifying agent, solidifying promoter, silane as coupling agent and two kinds of inorganic filler. Its advantages are high purity, flowability and high-temp resistance, and low viscosity and expansibility.

The present invention relates to American goldenrod herb total flavone extract and its preparation process and use. The American goldenrod herb total flavone extract contains quercetin, quercetin-3-O-beta-D-heteroside, kaempferol-3-O-alpha-L-rhamnoside, chlorogenic acid, etc. capable of preventing and treating senile dementia, various inflammatory respiratory diseases, esophagus cancer, etc. The preparation process is simple, high extracting rate, and the extract has high pharmacological effect, stable property, low toxicity and controllable quality.

A method of manufacturing an insulating sheet, a method of manufacturing a copper clad laminate, and a method of manufacturing a printed circuit board, as well as a printed circuit board manufactured using these methods are disclosed. The method of manufacturing an insulating sheet can include: forming a thermoplastic reinforcement material, which includes fibers secured by a thermoplastic polymer binder, and in which pores are formed; forming a thermoplastic resin layer such that the thermoplastic reinforcement material is impregnated with a thermoplastic resin; and hot pressing the thermoplastic reinforcement material and the thermoplastic resin layer. This method can be utilized to manufacture an insulating sheet, which has a low rate of moisture absorption and superb electrical properties, including a low dielectric constant (Dk) and low dielectric loss (Df), and in which the fibers can readily be impregnated with the resin.

The invention relates to an object storage device and a refrigerator with the object storage device. In particular, the object storage device comprises a drawer and a sealing device, and the sealing device is arranged to singly seal the drawer or arranged to be matched with an object storage room of the refrigerator to seal the drawer. Specially, the object storage device further comprises a humidity adjusting device which is installed in the sealing device and comprises an adjusting part and a switching part, wherein the adjusting part comprises a moisturizing module used for improving or keeping the humidity in the drawer and a drying module used for reducing the humidity in the drawer; and the switching part is arranged to enable at least a part of moisturizing module or at least a part of drying module to be exposed in the internal space of the drawer in an operationable manner, so that the drawer works in the moisturizing mode or the drying mode. In this way, the dry and wet multiplex aim of the internal space of the drawer can be achieved. In addition, the invention further provides the refrigerator with the object storage device, and the dry and wet multiplex drawer is provided for the refrigerator.

The present invention discloses a new type wall body light heat-preservation material, which is characterized in that: the present invention comprises the following raw materials according to the weight ratio: 10-15 percent of magnesia or magnesium hydrate, 3- 7 percent of magnesium chloride, 4-8 percent of perlite, 1-5 percent of alkali resisting fibre, 6-12 percent of powder coal ash or calcium carbonate and 0.3-1 percent of modifier, wherein, the modifier is made of the following components according to weight ratio: 6-10 percent of ferrous sulfate, 1-3 percent of oxalic acid, 1-3 percent of tertiary sodium phosphate, 0.5-2 percent of hexametaphosphate and 12-18 percent of aluminium sulphate. Compared with the original heat-preservation system, the material is with much better heat-preservation performance, much lower heat-conductivity coefficient, much lower density, and much lower water content and water absorption ability. The present invention is with much better performance in heat-preservation, heat-insulation as well as sound absorption and sound insulation and so on. The present is able to bear or endure acid, alkali and corrupted. The manufacturing cost is much lower and the construction process is much more convenient. The present is easy to be popularized.

A plasticizer-containing film of polyvinyl acetal having a softening temperature Tg of less than 74° C. contains at least one cyclohexane dicarboxylic acid ester as a plasticizer. The plasticizer-containing films have a low tendency for sweating of the plasticizer, and are useful in producing laminate safety glasses and photovoltaic modules.

A capacitor and a method of making a capacitor, is provided with improved reliability performance. The capacitor comprises an anode; a dielectric on the anode; and a cathode on the dielectric wherein the cathode comprises a conductive polymer and a polyanion wherein the polyanion is a copolymer comprising groups A, B and C represented by Formula AxByCz as described herein.

The invention provides a celecoxib-containing solid dispersion and a preparation method thereof. The celecoxib-containing solid dispersion comprises celecoxib and copovidone. The celecoxib-containing solid dispersion provided by the invention has the advantages of high rigidity, good friability and moderate glass temperature, can be suitable for large-scale industrialized production and overcomes the defects of low glass temperature, soft material, easy melting and bonding, difficulty in crushing and the like of a celecoxib solid dispersion which takes polyethylene glycol as a carrier.

The invention discloses sulfur-free ring stabilizing agent propellant powder which consists of the following components in parts by weight: 70 parts of an oxidant, 34 parts of a burnable agent, 6 parts of an adhesive, 2 parts of a stabilizing agent, 2 parts of an anti-aging agent, 1 part of a catalyst and 2 parts of an antismoke agent which are uniformly mixed according to a general method, wherein the oxidant is a mixture consisting of potassium perchlorate, amine perchlorate and barium nitrate; the burnable agent is a mixture consisting of potassium hydrogen terephthalate, potassium acid phthalate, nitrocellulose, purified terephthalic acid and hemp stem carbon powder; the stabilizing agent adopts calcium stearate; the anti-aging agent adopts calcium phthalate; the catalyst adopts copper oxide; the antismoke agent adopts aluminum hydroxide; the adhesive is selected from one or a mixture of multiple of phenolic resin, strong adhesive powder, glutinous rice flour and polyvinyl alcohol according to any ratio. The sulfur-free ring stabilizing agent propellant powder is high in power capability and excellent in safety performance indexes and has excellent storage stability, and the environment-friendly performance is greatly improved.

The invention discloses a preparation method of flux cored wires, particularly a preparation method of flux cored wire employing wet-mixing sintered medicinal powder, using a cold rolling steel belt as the sheath raw material of a flux-cored wire, using rutile and sintered power as main flux cored welding flux, rolling the steel belt into a U-shaped groove through longitudinal cutting, power matching and flux power drying of the steel belt, and filling welding flux in the U-shaped groove, and the steel belt is rolled and combined into an O-shaped pipe blank and further rolled and drawn into finished wires of phi 0.8 to phi 2.4 mm. The invention reduces the specific surface area of the powder, decreases moisture absorption of the powder, simultaneously has the advantages of simple and reliable process and low cost, and is worth of popularization.

The invention designs a high barrier PVA alloy capable of being processed with a thermoplasticity method. specifically speaking, through various monolayer or multi-layer thermoplasticity processing extrusion processing devices, the alloy is made into various high barrier films containing the alloy comprising a monolayer film, a multi-layer extrusion film, a high temperature retort film, a two-way stretch film and a thermo shrink film, hollow containers comprising a car oil tank, a bottom and a barrel, various tubular products comprising a fuel oil or oil delivery pipe and a gas pipe, various sheets and all high barrier products made from the material. The product made form the material has excellent chemically resistant performance, oil resistance, solvent resistance, transparency, processing stability, high barrier performance for various gases, aroma protection property, tensile strength and elongation at break.

The invention discloses a soluble fluorinated polyimide material. The material is prepared by copolymerization of three monomers. The preparation method comprises: condensing and copolymerizing two dianhydride monomers and a diamine monomer having an ether bond according to the molar ratio of the two dianhydride monomers to the diamine monomer of 1:1, wherein the molar ratio of the two dianhydride monomers is 1:1 to 1:10; or condensing and copolymerizing a diamine monomer without an ether bond, a diamine monomer without ether bond and a dianhydride monomer according to a molar ratio of the diamine monomers to the dianhydride monomer of 1:1, wherein the molar ratio of the diamine with the ether bond to the diamine without the ether bond is 1:1 to 1:10. The general structural formula of the material is shown in description. The material has high solubility, low moisture rate, high thermal stability and low absorption loss.

The invention discloses a microencapsulation peptide-containing fat powder feed additive and a production method thereof, and the microencapsulation peptide-containing fat powder feed additive contains core material and wall material, wherein the core material comprises 20-50 percent of grease; and the wall material comprises 20-50 percent of peptide powder, 3-5 percent of casein, 1-5 percent of monoglyceride, 1-5 percent of sucrose ester, 1-3 percent of carrageenan and 10-30 percent of maltodextrin. The production method of the feed additive comprises the steps of: mixing and stirring water phase and oil phase according to the formulation, and then carrying out high pressure homogenization and spray drying for completing primary embedding; and carrying out secondary embedding on the obtained microcapsule fat powder by using 5-10 percent of HPMC with the embedding rate reaching up to more than 95%. The obtained peptide-containing fat powder can be easily added into feed and has extremely high nutritional value, so that the feed additive is excellent in quality.

The invention discloses a reparation method of quartz fiber / chrome aluminum phosphate-based high temperature wave-transmitting material, characterized by comprising the following steps of: heating quartz fiber cloth at a temperature of 200-800 DEG C, cooling the quartz fiber cloth, and coating a protection coating on the surface of the quartz fiber cloth; mixing the chrome aluminum phosphate, curing agent, composite stuffing and water to prepare a chrome aluminum phosphate binding material; coating the chrome aluminum phosphate binding material on the surface of the quartz fiber cloth having the protection coating, drying at a temperature of 80-100 DEG C, and flatly laying the quartz fiber cloth; and processing more than two pieces of flatly laid and overlapped high temperature wave-transmitting material monomers by a mould press forming technique to obtain the product, namely, quartz fiber / chrome aluminum phosphate-based high temperature wave-transmitting material. The preparation method of the invention has the advantages of simple technique, good availability of raw materials and convenience for operation; besides, the prepared quartz fiber reinforced chrome aluminum phosphate-based high temperature wave-transmitting material has excellent moisture resistance, heat-resisting stability, mechanical property and dielectric property, so that the material is suitable for the use as a high temperature resistant wave-transmitting material.

A new brominated epoxy resin has been developed, which consists of following components:A. multifunctional phenol-benzaldehyde epoxy resin (formula 1) 10~70 weight %;B. difunctional epoxy resin 0~55 weight %;C. bromine-containing difunctional epoxy resin 0~20 weight %;D. tetrabromobisphenol-A epoxy resin 15~40 weight %;The synthesis is that (D) tetra bromo bisphenol-A reacts with at least one of (A), (B)and (C), then adding the rest of (A),(B) and (C) and mixing them uniformly, the new brominated epoxy resin produced, which can be applied to glass fiber laminate, and showing proper reactivity and a broad working window. The laminate possesses high Tg and good heat resistance, and applying to electron material with high performance.

Disclosed is a flame retardant thermoplastic resin composition that includes about 100 parts by weight of a mixed resin (A) including about 10 to about 90 wt % of an aromatic polyamide resin (A-1) and about 10 to about 90 wt % of a polyphenylene sulfide resin (A-2), about 0.5 to about 30 parts by weight of a phosphinic acid metal salt flame retardant (B), and about 10 to about 100 parts by weight of a filler (C).

The invention discloses a low smoke zero halogen waterproof high temperature resistant anti-corrosion armored cable which comprises a cable body, insulation wire cores, an insulation layer, a shielding layer and an outer sheath. A plurality of conductors are arranged in the cable body, an insulation wire core is arranged in each conductor, and a PVC plastic connection rod is arranged on the outside of the conductors. A current guide core is arranged at the center position of the cable body, an insulation layer wraps the conductors, a filler is arranged in a gap between the insulation layer and the conductors, a shielding layer is arranged on the outside of the insulation layer, a water-resisting layer and the armored layer wrap the shielding layer from the inside to the outside in an extruding mode, a stainless steel wire weaving layer is arranged on the outside of the armored layer, a heat insulation layer, an inner sheath and an outer sheath wrap the stainless steel wire weaving layer from the inside to the outside, a plurality of ground wire cores arranged in symmetry are evenly arranged in the heat insulation layer, and a graphite layer is arranged between the outer sheath and the inner sheath. The conductors are connected through the PVC plastic connection rod, so that the cable body is stable in use, service performance of the cable body is improved, and the service life is prolonged.