193results about How to "Maintain physical properties" patented technology

Plastic films, fibers and articles are provided long-term antimicrobial activity with a combination of certain phenolic and inorganic antimicrobial agents. The plastic films, fibers and articles with antimicrobial activity exhibit superior resistance to discoloration, may be processed at high temperature, and maintain physical properties upon weathering, especially upon exposure to ultraviolet radiation.

Provided is an aqueous binder for inorganic fibers, which is formaldehyde-free, has excellent strength, and is suitable for use under conditions of weakly acidic to weakly basic, and by which a cured product composed of the binder having excellent strength is obtained, and an thermal and / or acoustical insulation material made of inorganic fiber using the same. The thermal and / or acoustical insulation material is molded by using an aqueous hinder for inorganic fibers including: an acrylic resin with an acid value of 350 to 850 mgKOH / g; a crosslinking agent containing at least one dialkanolamine; and a curing accelerator, in which a molar ratio of the total number of the hydroxyl groups and imino groups in the crosslinking agent to the total number of carboxyl groups in the acrylic resin is 0.8:1 to 1.5:1, and in which pH of the hinder is adjusted to 6.0 to 8.0 with a volatile basic compound.

Plastic films, fibers and articles are provided long-term antimicrobial activity with a combination of certain phenolic and inorganic antimicrobial agents. The plastic films, fibers and articles with antimicrobial activity exhibit superior resistance to discoloration, may be processed at high temperature, and maintain physical properties upon weathering, especially upon exposure to ultraviolet radiation.

A polymer electrolyte membrane having outstanding water resistance and high thermal resistance, moreover having practical strength required for use as a polymer electrolyte membrane of a solid polymer electrolyte type fuel cell at low price, and a method for producing the polymer electrolyte membrane are provided. A polymer electrolyte comprising a block copolymer comprising one or more of blocks in which sulfonic acid groups are introduced and one or more blocks in which sulfonic acid groups are not substantially introduced wherein at least one block in the block copolymer is a block having aromatic rings in polymer chain, and a porous membrane, and a fuel cell using the membrane are provided. And moreover the present invention provides a method for producing a polymer electrolyte membrane comprising the steps of, (i) impregnating some of pores of a porous membrane with a solution (1) of a polymer electrolyte having a contact angle of less than 90° to said porous membrane, (ii) impregnating a remaining part in the pores of the porous membrane with a solution (2) of a polymer electrolyte having a larger contact angle than that of the solution (1) to said porous membrane, and (iii) removing a solvent.

A rotary hammer and a power tool. The rotary hammer is operable in an idle mode and a hammer mode and comprises a housing and a barrel positioned in the housing and having a forward portion. A ram is positioned within the barrel and is movable relative to the barrel between hammering positions and an idle position. In some aspects, a ram catcher assembly is positioned along the axis adjacent the forward portion of the barrel to releasably hold the ram in the idle position. The ram catcher assembly includes a friction member frictionally engageable with the ram and a damping member at least partially surrounding the friction member. As the ram moves to the idle position with a force, the damping member absorbs at least a portion of the force and the member applies friction to the ram.

This invention relates to preparation method of a flakiness microcrystalline cellulose, as well as its surface reshaping method. The process: in water disperse medium, take reaction with sulfuric acid to gain flakiness microcrystalline cellulose, then surface by acetic acid esterification or SAA absorption modifing, repass wash, filter , dryness, gain the product. The mass ratio of water and cellulose is 3 to 25:1, sulfuric acid volumetric concentration for 30 to 80%, temperature for 10 - to 85 deg, time for 5 to 120 minutes. The mass ratio of acetic ester modifier or SAA and microcrystalline cellulose is 0.1 to 5: 100. The modifier not only keep the favorable physics and mechanical property of cellulose, but also improve dispersibility, greatly advance consistency with high molecular material, broaden the application area.

The present invention aims at providing an antistatic optical film having excellent antistatic effect and high light transmittance, wherein an antistatic layer laminated on at least one side of the optical film. An antistatic optical film having an antistatic layer laminated on at least one side of the optical film, wherein rubbing treatment is performed on a surface of the optical film on which the antistatic layer is laminated, and a conductive polymer in the antistatic layer is aligned.

The invention discloses a processing method of green bud tea, comprising the following steps: paving tea leaves on a tea groove, wherein the paving thickness is 10-15cm; ventilating with an assistant blower, wherein the paving time is 10-14h; water-removing the tea leaves, wherein the cylinder temperature of the tea inlet end is 269-275 DEG C, the middle section temperature is 253-260 DEG C, the tea outlet end temperature is 219-225 DEG C, the leaves temperature is 102-108 DEG C, and; the water removing time is 1min25s-1min30s; directly putting the water removed tea leaves to a vibration groove, and putting the tea leaves into a wind selector, sending the selected tea leaves to a microwave water removing machine through a transporter, wherein the temperature of the water removing machine is 120 DEG C, the tea leaves temperature is 46-49 DEG C, the rotary speed is 1100r / min, and the water removing time is 50s; grading, carding, shaping, drying, infrared flavor enhancing. The method canincrease the shape, color and smell of green bud tea.

The invention discloses an IMD (In-Mole Decoration) injection molding PC / ABS (Polycarbonate / Acrylonitrile Butadiene Styrene) composite material and a preparation method. The IMD injection molding PC / ABS composite material comprises the following components in parts by weight: 50-70 parts of PC, 6-10 parts of ABS terpolymer, 6-18 parts of filler, 3-8 parts of toughening agent, 10-13 parts of flame retardant, 0.2-0.8 part of anti-dripping agent, 0.1-0.5 part of antioxidant, 0.1-0.5 part of lubricating agent, 1-2 parts of dispersing agent and 1-3 parts of ductility improver. In the invention, the PC and the ABS terpolymer are used as base materials, and blending modification is carried out by filling minerals and combining the toughening agent, the flame retardant, the antioxidant, the lubricating agent, the dispersing agent and the ductility improver. Compared with traditional PC / ABS alloy, the composite material maintains the physical properties of the traditional PC / ABS material and also greatly improves the size stability of the traditional PC / ABS alloy material, thereby solving the problem of buckling deformation of secondary stamping of the traditional PC / ABS in IMD injection molding.

Disclosed is a coating material for an aluminum die casting mold and a method for manufacturing the same. More particularly, the coating material for an aluminum die casting mold is provided, which is formed on a surface of a base material, and which sequentially comprises a Cr(Si) or Ti layer, a Cr(Si)N or Ti(C)N adhesion layer, a TiAlN / Cr(SiC)N nano-multilayer, and a Cr(SiC)ON layer. The coating material provides superior heat resistance, high temperature stability, and sticking resistance as compared to conventional CrN, TiAlN and AlCrN coating materials, thus extending the lifespan of the mold.

A composite dielectric material comprising a resin resulting from a polyvinylbenzyl ether compound and a dielectric ceramic powder dispersed therein is useful in the high-frequency region. A composite magnetic material comprising a polyvinylbenzyl ether compound and a magnetic powder is also provided as well as a flame retardant material comprising a polyvinylbenzyl ether compound and a flame retardant. These materials may be used in the fabrication of substrates, prepreg sheets, coated metal foils, molded items, and metal foil-clad substrates.

The invention discloses a graphene pre-dispersed master batch. The graphene pre-dispersed master batch is prepared from the following components in percentage by weight: 10 to 60 percent of graphene, 9 to 36 percent of rubber carrier, 3 to 10 percent of silane coupling agent, 2 to 8 percent of calcium stearate, 5 to 12 percent of naphthenic oil and 5 to 25 percent of inorganic filler. According to the graphene pre-dispersed master batch disclosed by the invention, the rubber carrier is used as a base material; meanwhile, the silane coupling agent, the calcium stearate, the naphthenic oil and the inorganic filler are added, the graphene is prepared into a pre-dispersed master batch form, is enabled to be coated in the rubber carrier and is enabled to be uniformly pre-dispersed in master batch, so that the aggregation of the graphene is avoided, and the graphene is enabled to be uniformly dispersed in subsequent rubber products; the master batch is convenient to store, transport and weigh, the utilization rate of the graphene can be effectively improved, and the cost is reduced; the graphene pre-dispersed master batch can be particularly applied to tire tread rubber having higher requirements on processability, crosslinking density, tensile property, ageing-resistant performance, rolling resistance, abrasion property and wet skid resistance, or can be applied to other high-quality rubber products.

The invention discloses a preparation method for micro-nano-fibers. The method comprises the steps of (1) mixing a cellulose raw material with a buffer solution, adding a bio-enzyme, shaking to obtain a cellulose suspension liquid, and after filtering and washing, performing high-temperature inactivation on a filter liquor; (2) performing micro-fine pulp grinding on the processed cellulose to obtain a micron cellulose pulp liquid; and (3) performing low-temperature high-intensity micro-jet homogenization processing on the micron cellulose pulp liquid, and performing freeze-drying to obtain micro-nano-cellulose. According to the preparation method, a bio-enzyme pretreatment method is adopted for replacing a conventional acid or alkali treatment method, so that the problem of acid and alkali neutralization treatment in wastewater discharge is reduced; the micro-fine pulp grinding and the high-intensity micro-jet homogenization treatment of the cellulose are adopted, so that the obtained micro-nano-cellulose is uniform in size; and the prepared micro-nano-cellulose is uniform in dispersion and can be applied to products including food additives and military protection articles.

The present invention provides a resin for toner binders, which comprises two polyester resins (A) and (B), said resin (A) being a crosslinked modified polyester resin consisting of the reaction product from a crosslinked polyester resin (a) and a polyepoxide (c) and said resin (B) being an acid anhydride-modified linear polyester resin consisting of the reaction product from a linear polyester resin (b) and an acid anhydride (r).

Provided is a method of manufacturing a light-shielding material for use in optical instrument and having a light-shielding coat with a broad low-gloss region while maintaining the physical properties, such as a light-blocking property, necessary for light-shielding coat. In this method for manufacturing a light-shielding material comprising a light-shielding coat formed on the substrate, a coating liquid is prepared containing at least a binder resin, black fine particles and a matting agent having a variation coefficient of 20 or larger. Next, this coating liquid is coated on the substrate and dried to form a light-blocking coat.

A polyester fiber having outstanding flame resistance, curl-setting property, melt-drip-proof property, transparency, devitrification resistance, and controlled gloss of fiber, while maintaining physical properties of usual polyester fibers, such as heat-resistance and tensile elongation and strength is provided. A flame retardant polyester fiber for artificial hair that can solve the problem may be obtained by melt-spinning a composition obtained by melt-kneading 2 to 20 parts by weight of organic cyclic phosphorus compounds and / or phosphoric ester amido compounds (B) into 100 parts by weight of a polyester (A) comprising one or more kinds of polyalkylene terephthalates and copolymerized polyesters having a polyalkylene terephthalate as a principal component, and a composition obtained by blending organic fine particles (C) and / or inorganic fine particles (D) into the above-mentioned composition.

The invention provides a processing process of a lemon jelly dried sugar curing tablets. The process comprises the following steps of: cleaning separated fresh lemons, washing, disinfecting, airing, dewatering, freezing, slicing, vacuum freezing and drying, dipping molasses and drying to prepare a lemon jelly dried sugar curing tablets. The processed tablets has the advantages of high quality, good mouthfeel, convenient storage, convenient use and great commercial value.

The invention belongs to the field of an oligosaccharide preparation method, and particularly relates to a method for preparing chitosan oligosaccharide from papain through freeze drying. The method for preparing the chitosan oligosaccharide from the papain through freeze drying provided by the invention comprises the following steps of dissolving chitosan into an acetic acid-sodium acetate buffersolution for preparing a chitosan solution; adding the papain into the chitosan solution for enzymolysis; after the enzymolysis is completed, dialyzing filter liquid by a dialyzing method; then, performing heating concentration on the collected dialyzing liquid; next, performing freeze drying and the like. The method for preparing the chitosan oligosaccharide from the papain through freeze dryingprovided by the invention has the advantages that simplicity, convenience, high speed and high efficiency are realized; the method is suitable for industrialized production; good industrial popularization practicability and values can be realized.

There is disclosed a conductive resin composition, comprising: (a) a resin component, and (b) a fine carbon fiber dispersed in the resin component, wherein a graphite-net plane consisting solely of carbon atoms forms a temple-bell-shaped structural unit comprising closed head-top part and body-part with open lower-end, 2 to 30 of the temple-bell-shaped structural units are stacked sharing a common central axis to form an aggregate, and the aggregates are connected in head-to-tail style with a distance to form the fiber. The resin composition has high conductivity while maintaining the original physical properties of the resin.

Provided is a natural leather having a novel coating layer which feels leathery. The coating film retains material properties such as strength and wearing resistance. When the user directly touches the natural leather, the coating layer present on the surface of the natural leather gives slick characteristics of natural leathers and smoothness. The natural leather has a coating film formed on a surface thereof, the coating film including: a color coat layer formed from a mixture of a hard component (10% modulus is more than 2.3 but no more than 3.0) and a soft component (10% modulus is more than 0.0 but no more than 1.0) of a two-component polyurethane resin; and a topcoat layer formed from a mixture of a medium component (resin having a 10% modulus of more than 1.0 but no more than 2.3) and a soft component (resin having a 10% modulus of more than 0.0 but no more than 1.0) of a two-component polyurethane resin.

The invention discloses a PVC (polyvinyl chloride) waterproof coiled material. The PVC waterproof coiled material is characterized in that: boric sludge or red mud serving as a filling material is added into raw materials of the PVC waterproof coiled material, and the mass percent of the adding amount of the boric sludge or the red mud in the raw materials of the PVC waterproof coiled material to the adding amount of PVC resin is 40-50: 100. The PVC waterproof coiled material has the advantages of flame resistance, corrosion resistance and color exposure; the boric sludge or the red mud serving as the filling material in the PVC waterproof coiled material remarkably improves the use stability and ageing resistance of the PVC waterproof coiled material, and increases the functions of corrosion resistance, fire resistance, self cleaning and the like. A preparation process for the PVC waterproof coiled material is simple, and the boric sludge or the red mud used as the common filling material only needs to be blended.

The present invention relates to a composition for manufacturing insulation materials of an electrical wire and an electrical wire manufactured using the same. The present invention provides a composition for manufacturing insulation materials of an electrical wire having a multilayer structure, which is used for manufacturing a first insulation coating layer made of a composition including a predetermined base resin, an antioxidant and a co-crosslinking agent so as to surround a conductor or a conductor bundle for an electrical wire; a second insulation coating layer made of a composition including a base resin polyvinylidene fluoride (PVDF), a predetermined antioxidant and a co-crosslinking agent so as to surround the first insulation coating layer, and an electrical wire manufactured using the same. According to the present invention, light-weigh products may be produced, and also an electrical wire or wire products used under a high-temperature environment have advantageous properties since the composition is excellent in a mechanical property and a thermal resistance and capable of maintaining physical properties at a high temperature of at least 150° C. for a long time.

A flame retardant thermoplastic resin composition includes (A) about 20 to about 99.49 wt % of an aromatic polyamide resin; (B) 0 to about 50 wt % of a polyphenylene sulfide resin; (C) about 0.5 to about 30 wt % of a phosphinic acid metal salt flame retardant; (D) about 0.01 to about 10 wt % of a zinc compound; and (E) 0 to about 70 wt % of a filler comprising an organic filler, an inorganic filler, or a combination thereof. The flame retardant thermoplastic resin composition can have excellent heat resistance, mechanical strength and processability, a low moisture absorption rate and can inhibit corrosion of a metal surface of an extruder or a mold. The flame retardant thermoplastic resin composition can be used for various electrical electronic parts or auto parts as an environmentally friendly flame retardant thermoplastic resin composition.

A system and method for laser light amplification provides amplification of a laser light beam emitted from a laser light source as low-amplification seed laser light signal. The low-amplification seed laser light signal is transmitted to an amplification component. The amplification component amplifies the low-amplification seed laser light signal by stimulating emissions of the population inversion provided by a pumping diode to generate an amplified laser light signal. The system and method further directs the amplified laser light signal to an output destination. The destination may be an object undergoing laser ultrasound testing. The amplified laser light may reflect with a modulation characteristic of a sound energy wave about the object. The reflected laser light may be collected by an interferometer and used in the detection and characterization of the sound energy wave. The result of the present invention is a system and method of operation providing higher pulse rates, improved pointing stability, and optionally variable pulse rates for a variety of uses, including for non-destructive laser ultrasonic testing of materials.

The invention relates to a rod drop system and a method of a control rod driving mechanism. The rod drop system comprises a sleeve, a spring, a spiral transmission mechanism and two friction plates, wherein a separation plate which is used for separating an inner cavity into an upper section and a lower section along the length extension direction is arranged on the inner wall of the sleeve; a limiting sleeve which is positioned above the separation plate is arranged in the inner cavity of the sleeve; the spiral transmission mechanism comprises a rotary friction plate which is connected to the outer edge of a guide rod through threads and can move vertically along with the guide rod; one of the two friction plates is fixedly connected to the upper surface of the separation plate, and the other friction plate is fixedly connected to the lower surface of the rotary friction plate and is opposite to the friction plate which is fixedly connected to the upper surface of the separation plate. According to the system and the method, during the drop of a control rod, the effects of effective buffering and complete damping are achieved in sequence, the damage to the control rod driving mechanism is avoided, and the risks of breakage of a chain, bending or damage of a chain wheel shaft and the like are reduced.

The invention belongs to the technical field of medicines and relates to a myricetin nanosuspension and a preparation method thereof. The myricetin nanosuspension is prepared by adopting a settling method and a high-pressure homogenization method, and the formula comprises myricetin and a stabilizer according to the weight ratio of 1: 0.25-1: 2.5. According to the preparation method provided by the invention, the formula is optimized, Tween-80, Cremophor EL and D-alpha-tocopheryl polyethylene glycol 1000 succinate (TPGS) are screened as the stabilizer, the prepared myricetin nanosuspension has stable nature and simple composition of the formula, the preparation process is simple, convenient and feasible, and the particle size range is 100nm-300nm; and by reducing the particle size of a medicament, the solubility and the dissolution of the myricetin are obviously improved, and the oral bioavailability and the in-vivo tissue distribution of the myricetin are further improved. In addition, the myricetin nanosuspension can be freeze-dried, and proper excipients are added into the obtained freeze-dried powder for further preparing oral liquid, tablets, granules, capsules and other different oral preparations so as to facilitate clinical applications.