56results about How to "Excellent physiological inertia" patented technology

The invention provides a preparation method of a self-adhesion silicon rubber foam material. The method comprises the following steps: mixing silicon rubber, a foaming agent, a vulcanizing agent, a reinforcing agent and micromolecular silicon oil as raw materials, milling and sheeting, and performing heat treatment foaming to obtain the self-adhesion silicon rubber foam material. Compared with an existing preparation method, the method has the characteristics that the used raw materials have few varieties and are simple and easy to prepare, low in cost and free of environmental pollution; moreover, by adopting the heat treatment foaming technology, the prepared silicon rubber material is a foam material for foaming, which is high in foaming efficiency, light in weight, excellent in heat insulation property, high and low-temperature resistance, chemical stability and physiological inertia and good in self-adhesion performance, and the force of adhesion between the foam material and an aluminum plate is 10-25N / mm.

The invention relates to a true tri-axial hydraulic fracture test machine which comprises a confining pressure system, an injection system and a true tri-axial test stand, wherein the injection system comprises a fracturing solution container I, a fracturing solution container II and a piston container, and a stirring mechanism is mounted in the fracturing solution container II. A test method comprises the following steps: injecting clear water and an additive into the fracturing solution container II according to a certain proportion, and starting the stirring mechanism to stir; injecting a fracturing solution into a cavity body above a piston plate in the piston container by utilizing pressure; respectively applying confining pressures onto three axial directions of a downhole rock core simultaneously through three high-pressure advection pumps; draining into a cavity body under the piston plate in the piston container through a constant-pressure constant-speed plunger pump I and / or a constant-pressure constant-speed plunger pump II; injecting the fracturing solution into the rock core to start to fracture and taking out the downhole rock core after the end of fracturing to observe fracture expansion condition. The true tri-axial hydraulic fracture test machine provided by the invention has the benefits that the technical scheme is simple and easy to understand, the operation is convenient and fast, the unified control of the confining pressure system and the injection system can be realized, and the fracturing solution is convenient to replace.

The invention discloses a preparation method of organic silicon modified normal-temperature multiple self-crosslinked epoxy resin emulsion. The preparation method comprises the following steps: opening a ring of epoxy resin by using lauric acid; consuming away epoxy groups; performing grafting polymerization by using double-bond organo-siloxane, diacetone-acrylamide and an acrylic acid type monomer; and neutralizing the emulsion and adding hexane diacid dihydrazide to obtain the organic silicon modified normal-temperature multiple self-crosslinked epoxy resin emulsion. After the emulsion is formed into a film, ketone carbonyl and hydrazine have dehydration reaction under an acidic condition to generate a hydrazine compound; silanol and an active group of a polymer are condensed to form a three-dimensional network structure in order to realize normal-temperature multiple self-crosslinking. The solid content of the emulsion prepared by the method disclosed by the invention is 45% to 55%; the adhesive force reaches 0-1 grade after the film is formed by room temperature curing; the impact resistance is 50kg.cm to 65kg.cm; the flexibility is 2mm to 3mm; the water resistance is 120h to 150h; and the resistance to a 3% NaCl solution is 100h to 180h. The emulsion disclosed by the invention can be widely applied to various water-based paints as base resin.

The invention provides a kind of composite material for making a degradable ureteral stent, comprising: 60-98% by weight of L-lactide / Epsilon-caprolactone copolymer, and 2-40% by weight of polyvinylpolypyrrolidone. The L-lactide / Epsilon-caprolactone copolymer in the composite material is elastomeric material with good biocompatibility, and the polyvinylpolypyrrolidone can reduce a surface friction coefficient of the prepared degradable ureteral stent, and simultaneously raises the degradation speed of the degradable ureteral stent. The invention also discloses a degradable ureteral stent prepared by the composite material. The degradable ureteral stent has good biocompatibility, is easy to degrade, and can be used in an operation in urinary surgery.

The invention relates to a true triaxial sand fracturing testing machine, which comprises a confining pressure system and an injecting system, wherein the injecting system comprises a first fracturing fluid container, a second fracturing fluid container and a piston container; two piston sheet baffle plates are arranged in the piston container. A true triaxial sand fracturing testing method comprises the following steps that stirring is performed in the second fracturing fluid container to form sand-carrying fracturing fluid; prepositive fracturing fluid is injected into the first fracturing fluid container; the prepositive fracturing fluid and the sand-carrying fracturing fluid are respectively injected into a middle cavity and an upper cavity of the piston container by pressure; through a first constant-pressure constant-speed plunger pump and / or a second constant-pressure constant-speed plunger pump, water is discharged into a lower cavity of the piston container; the prepositive fracturing fluid, the sand-carrying fracturing fluid and displacement fracturing fluid sequentially enter a downhole core for fracturing; after the fracturing is finished, the downhole core is taken out; the crack expanding condition is observed. The technical scheme is simple and is easy to understand; the operation is convenient and fast; the unified control on the confining pressure system and the injecting system can be realized; the fracturing fluid replacement is convenient.

The invention discloses an organosilicon separating gel, its preparation method and application. The silicone separating gel is made of the following components in parts by weight: 54-82 parts of organopolysiloxane; 4-15 parts of hydroxyl silicone oil; 10- 25 parts; 1-6 parts of silane coupling agent. The preparation method of the organosilicon separating gel is to mix the components uniformly, heat up to 60-116°C, stir and keep warm for 5-12 hours, and then vacuumize at 120-180°C for 1-6 hours to obtain the organosilicon separating gel. glue. The application of the organosilicon separating gel is to prepare a rapid blood collection tube with serum separating gel. The organosilicon separating gel provided by the invention is hygienic, safe, non-toxic, strong in isolation, good in liquid sealing, and has superior thixotropic performance. The invention provides a method for preparing organic silicon separating gel, which has simple process, mild and controllable preparation conditions, and is easy to popularize.

The invention discloses a polysiloxane rust-proof liquid, a preparation method and the application thereof. The polysiloxane rust-proof liquid comprises the components by weight percent: 5-60% of polysiloxane, 0.01-10% of cross linking reagent, 0.01-10% of catalyst and 45-90% of solvent. The polysiloxane rust-proof liquid is colorless, smelless and non-toxic, in accordance with the regulation of food industry as well as low in production cost and simple in operation, not only solves the problems that the rust-proof liquid is complicated in manufacturing and coating technique, contains harmful substance, is not environment-friendly and has overhigh economic cost, but also fill in the gap of preventing the rust of metal bottle cap trim in China, thus being applicable to metal bottle caps of various drinks; furthermore, by adopting the metal bottle cap trim polysiloxane rust-proof liquid, a hydrophobic adsorption film can be formed at the metal bottle cap trim, so that the moisture of the external environment can be isolated, and the corrosion resistant effect can be achieved.

The invention discloses heat-conducting silicone grease which is prepared from the following raw materials in parts by weight: 67 parts of methyl ethoxy silicone oil, 16 parts of fibrous carbon nano-tubes, 25 parts of aluminum oxide, 12 parts of scrap rubber nano-powder, 0.2 part of silane-based quaternary ammonium salt phase transfer catalysts, 3.5 parts of organic silicone oil, 8 parts of silane coupling agents and 0.8 part of antioxidants 1076. According to the heat-conducting silicone grease, the heat-conducting property of a product is enhanced by compounding the fibrous carbon nano-tubes, the aluminum oxide and the scrap rubber nano-powder as heat-conducting insulating fillers, the scrap rubber nano-powder can be used for enhancing the flowability of the product in a preparation process and filling a gap to obtain larger heat-transfer specific surface area, so that a final heat-conducting silicone grease product has the advantages of excellent heat conductivity, electrical insulation, weather resistance, hydrophobicity, physiological inertia and less surface tension, lower viscosity-temperature coefficient, higher compression resistance and no corrosion effect and can be used as a gas filling medium between an electronic element and a radiating fin.

The invention discloses anti-ultraviolet anti-discoloration ultra-clean hydraulic oil which is prepared from the following components in parts by weight: base oil, methyl silicone oil, benzotriazole, sodium tripolyphosphate, a demulsifying agent, nano silicon dioxide, a UV-531 ultraviolet light absorber, an antioxidant, an anti-wear agent, a dispersing agent, a viscosity modifier, a defoaming agent, a lubricating agent and a cosolvent. According to the anti-ultraviolet anti-discoloration ultra-clean hydraulic oil, the problems that hydraulic oil in the existing market cannot resist ultraviolet and discoloration and is high in turbidity are solved, the protection effect on equipment after the product is used is improved, the anti-ultraviolet and anti-discoloration capacity is improved, meanwhile, a lubricating medium is used for slowing down abrasion of the product, the hydraulic oil has the functions of cleaning, preventing pollution and the like, prevents sedimentation and agglomeration of particles, improves the use effect of a product, delays yellowing, blocks physical property loss, better meets the use requirements, helps to improve the working speed and can facilitate work of workers.

The invention discloses an anti-track uvioresistant ADSS optical cable jack material which comprises the following raw materials by weight part: 65-70 parts of high density polyethylene resins, 15-20 parts of ethylene acrylic copolymers, 9-10 parts of polyethylene grafting materials, 5-6 parts of polydimethylsiloxane, 15-20 parts of magnesium hydrate, 5.0-5.5 parts of carbon black master batches, 0.5-1.0 part of ultraviolet light absorber and 0.5-1.0 part of antioxidant. In a preparation process, the raw materials are put into a high-speed mixing machine and are uniformly mixed, and then are continuously extruded by a double-screw extruder for two times, and are cooled, cut into grains and dried, so that the jack material provided by the invention is acquired; the temperature of the double-screw extruder is at 160-230 DEG C. The anti-track uvioresistant ADSS optical cable jack material can serve as the jack material special for 220KV and above ADSS optical cable, can realize high-altitude suspending remote conveying, can resist corona and electric track, can resist ultraviolet irradiation, can bear the cold environment test under wind, rain, snow and frost environments and has excellent physical and mechanical properties.

The invention discloses a heat-conducting silicone grease composition which is prepared from methyl ethoxy silicone oil, hexagonal boron nitride, aluminum oxide, scrap rubber nano-powder, a silane-based quaternary ammonium salt phase transfer catalyst, organic silicone oil, a silane coupling agent, an organic siloxane surface modification agent, an antioxidant 168 and an antioxidant 1010. According to the heat-conducting silicone grease composition, a product is high in performance cost ratio by compounding the hexagonal boron nitride, the aluminum oxide and the scrap rubber nano-powder as heat-conducting insulating fillers; in addition, the scrap rubber nano-powder with a small particle diameter can be used for enhancing the flowability of the product in a preparation process and filling a gap to obtain larger heat-transfer specific surface area, so that a final heat-conducting silicone grease composition product has the advantages of excellent heat conductivity, electrical insulation, weather resistance, hydrophobicity, physiological inertia and less surface tension, lower viscosity-temperature coefficient, higher compression resistance and no corrosion effect, can be used for well filling the gap between an electronic element and a radiating fin and is a very good medium material of the electronic element.

The invention provides silicone rubber / polylactic acid thermoplastic vulcanized rubber and a preparation method thereof, and designs a synergistic compatibilization system with a good effect, the mutual interface action of polylactic acid and silicon rubber is improved, and silicone rubber / polylactic acid thermoplastic vulcanized rubber with electrostatic resistance and gas barrier property can be prepared, wherein the tensile strength of the silicone rubber / polylactic acid thermoplastic vulcanized rubber can be up to 25MPa, and the breaking elongation of the silicone rubber / polylactic acid thermoplastic vulcanized rubber can be up to 200%. Application of silicon rubber can be expanded to the field of thermoplastic vulcanized rubber, meanwhile the application range of polylactic acid is further widened, and a novel material which is biodegradable and can be also used in the field of biomedicine can be provided.

The invention discloses lubricating oil for electrical equipment, and belongs to the technical field of lubricating oil. The lubricating oil comprises the following raw materials, by weight part, 60-70 parts of polyol ester, 14-20 parts of silicone oil, 32-35 parts of flaxseed oil, 2-4 parts of essence, 3-5 parts of a viscosity index improver, 1-4 parts of an anti-corrosive agent, 0.5-1 part of an anti-oxidant, 5-7 parts of an oiliness agent, 4-6 parts of a cleaning dispersant, 1-2 parts of a metal deactivator, and 2-5 parts of an antifreezing agent. The invention discloses a preparation method of the lubricating oil. The lubricating oil is good in corrosion resistance, freezing resistance, and oxidation resistance and has delicate fragrance.

The invention belongs to the technical field of hygienic products, and particularly relates to a recyclable environment-friendly diaper. The diaper comprises a diaper body, and the diaper body comprises a urine groove, an excrement groove in the rear side of the urine groove, a urine storage layer below the urine groove and the excrement groove, waist surrounding fixing belts and a fixing waistband; the waist surrounding fixing belts are arranged on the front side and the rear side of the urine storage layer, and the fixing waistband is used for fixing the waist surrounding fixing belts; a urine leakage opening is formed in the bottom of the urine groove, the urine leakage opening is communicated with the urine storage layer, and a urine discharging channel is formed in the lower side of the urine storage layer; a toilet paper fixing belt used for fixing disposable toilet paper is arranged in the excrement groove. The diaper can solve the problems that an existing diaper needs to be frequently replaced, the air permeability is not good, the environment is polluted, the cost is high, and excrement is not easy to clean away.

The invention discloses an organic silicon separation gel and a preparation method and application thereof. The organic silicon separation gel is prepared from the following components by weight portion: 54 to 82 portions of organopolysiloxane, 4 to 15 portions of hydroxy silicone oil, 10 to 25 portions of gas phase method silicon dioxide subjected to hydrophobization treatment by the silicoorganic compound and 1 to 6 portions of silane coupling agent. The preparation method of the organic silicon separation gel comprises the following steps: evenly mixing the components; increasing the temperature to between 60 and 116 DEG C; stirring the mixture and maintaining the temperature for 5 to 12 hours; carrying out vacuuming on the mixture for 1 to 6 hours at a temperature of between 120 and 180 DEG C; and obtaining the organic silicon separation gel. The application of the organic silicon separation gel is that the gel is used for preparing a rapid blood collecting tube containing serum separation gel. The organic silicon separation gel provided by the invention has the advantages of sanitation, safety, no toxicity, strong isolation property, good liquid seal property and excellent thixotropic property. The preparation method of the organic silicon separation gel has simple preparation method and process, mild and controllable preparation condition and is easy to popularize.

The invention discloses a preparation method of a zirconium ball carrier, and application of the zirconium ball carrier to a manganese-based desulfurizing agent. During the preparation, zirconia is used as a carrier support body; polyether sulfone is used as a bonding agent; polyvinylpyrrolidone is used as a dispersing agent; through two-way substitution of N-methyl pyrrolidone and water, a sphere is formed by a wet process in water; after high-temperature sintering, a spherical wear-resistant carrier of a porous structure is formed, i.e., the zirconium ball carrier is obtained. A bran-new carrier preparation method is used; the porous wear-resistant spherical carrier is prepared by a phase inversion method; the spherical carrier is suitable for the preparation of all impregnated catalysts; the problems that the air resistance of a conventional powder catalyst is great, so that the spherical carrier can be swept and taken away by airflow during experiment, and the like are solved. When the carrier is used for preparing a high-temperature manganese-based desulfurizing agent, a high-precision renewable desulfurizing agent is obtained; the desulfurizing agent can be used for removing H2S in an IGCC (Integrated Gasification Combined Cycle); the technical support is provided for electric field electricity generation of an SOFC (Solid Oxide Fuel Cell) with high energy utilization efficiency.

The invention discloses a heat-resisting waste asphalt regenerant which comprises the following components in parts by weight: 20 to 50 parts of rubber oil, 10 to 20 parts of waste butylbenzene rubber powder, 20 to 30 parts of dimethicone, 2 to 10 parts of nanometer titania, 1 to 4 parts of plasticizer and 1 to 5 parts of anti-aging agent. The invention also discloses a preparation method of the heat-resisting waste asphalt regenerant. The heat-resisting waste asphalt regenerant provided by the invention has the advantages of good heat resistance, good high-temperature stability, obvious regeneration effect, sustained action and low cost; the preparation method is simple and non-toxic, and facilitates environmental protection.

The invention provides liquid silicone rubber and a preparation method thereof. The liquid silicone rubber is prepared by mixing the following raw material components in parts by weight: 100 parts ofalpha,omega-divinyl polymethyltrifluoropropylsiloxane, 1-5 parts of methylphenyl polyhydrosiloxanes, 5-20 parts of side chain vinyl copolymethyl vinyl trifluoropropylsiloxane, 20-40 parts of fumed silica, 1-2 parts of processing aids, 0.5-1 part of catalyst and 0.01-0.1 part of an inhibitor. Compared with conventional addition liquid silicone rubber, the liquid silicone rubber is given with good oil resistance, corrosion resistance and low temperature resistance by introducing fluorine-containing groups; the liquid silicone rubber is given with good high and low temperature, damping, radiationresistance, physiological inertia, electrical performance and optical performance by introducing phenyl groups; and vinyl polymethyltrifluoropropylsiloxane and the methylphenyl polyhydrosiloxanes arecrosslinked and cured by hydrosilylation reaction under the action of a platinum catalyst to form a material with composite performance, so that the liquid silicone rubber has a wider application field.

The invention provides nosiheptide soluble powder and a preparation method thereof. The nosiheptide soluble powder comprises nosiheptide, a carrier and a cosolvent. The cosolvent is one or more of poloxamer, polyvinylpyrrolidone, polyethylene glycol, sodium deoxycholate and polysorbate. The cosolvent selected in the invention has excellent physiological inertness and excellent biocompatibility. Thereby, nosiheptide can be uniformly dissolved in water to form a clear and uniform solution which can be better absorbed and utilized, and the bioavailability is improved. The selected one or more carrier components ensure that the nosiheptide soluble powder has higher solubility at normal temperature, so that the solubility of the nosiheptide at normal temperature can reach 2%. The preparation method of the nosiheptide water-soluble powder provided by the invention has the advantages of conventional equipment and simple preparation process, and is suitable for industrial mass production.

The invention belongs to the technical field of power and particularly relates to an improving process for the hydrophobicity of external insulation of power equipment. The improving process comprises the following steps: (1) roughening the surface of the power equipment; (2) preparing a viscous solution from 15-20 parts of fluoroethylenepropylene, 10-15 parts of vinyl-terminated silicon oil, 5-10 parts of dimethyl silicon oil, 5-10 parts of polyetheretherketone and 20-60 parts of a diluent, pouring a solution film with the thickness of 300-800mu m on the surface of the power equipment, and then, carrying out vacuum defoamation; (3) uniformly scattering 10-30 parts of hydrophobic nanopowder on the surface of the solution film in the step (2) by a sieve, keeping the scattering for 20-26h, and then, carrying out baking at 80-150 DEG C for 2-6h to form a film; and (4) removing residual powder on the surface of the film in the step (3) by flushing with clear water, and drying the film. The improving process disclosed by the invention is low in cost, safe and convenient to operate and high in adhesion strength of the film on the outer edge of the equipment and a substrate.

The invention relates to a panax notoginseng saponins sustained-release gel and a preparation method thereof and relates to the field of medicine health care. The panax notoginseng saponins sustained-release gel comprises, by weight ratio, 56-74% of carboxymehyl chitosan, 7.4-16.6% of polyvinylpyrrolidone, 0.07-0.11% of panax notoginseng saponins and 18.4-27.7% of coss-linking agent. The medicine release rate of panax notoginseng saponins is effectively controlled, the panax notoginseng saponins utilization rate is improved, metabolism dynamics properties of the medicine in the human body are improved, too high medicine concentration in blood is avoided, and a stable plasma concentration is provided, so as to achieve the objectives of prolonging action time of the medicine in the human body and reducing dosing times; toxic and side effects of the medicine can further be reduced, and patients' compliance is improved.

The invention provides an antistatic adhesive. The antistatic adhesive is prepared by mixing of raw rubber with high hexenyl content, raw rubber, silicone oil, hydrogen-containing silicone oil, a release agent, blue pigment, conductive carbon black and an antistatic agent. The antistatic adhesive disclosed by the invention has permanent antistatic function, the surface resistivity of the product is 10<5>-10<11>ohm / m<2>, static electricity is effectively eliminated, so that the product does not absorb dust or paper scraps, electric stunning and electric spark phenomena are not generated, also the antistatic adhesive has excellent high and low temperature resistance, can be used at a temperature ranging from -50 to 200DEG C, is not easily oxidized and degraded in ozone and radiant ray environments, has good chemical stability, and has excellent hydrophobicity, moisture resistance, shock resistance, physiological inertia and the like.

The invention discloses alkyd paint with excellent yellowing resistance and a preparation method of the alkyd paint. The alkyd paint is prepared from the following components in percentage by mass: 55-65% of alkyd resins, 1-5% of pigments, 1-3% of fillers, 0.5-1.5% of aids, 0.5-1.5% of a catalyst, 0.05-0.25% of a wetting agent, 0.05-0.25% of an anti-skining agent, 1.5-3.5% of antioxidant and 25-35% of a solvent. The preparation method comprises the following steps: adding alkyd resins into a mixer, stirring, adding aids, pigments, an antioxidant and fillers, stirring for 20-30 minutes, adding one of the solvents so as to obtain a mixture; adding the mixture into a grinding machine for grinding; adding a dryer, the wetting agent and the anti-skining agent into the ground mixture, stirring for 20-30 minutes, adding the residual solvents for adjusting the viscosity, stirring for 20-30 minutes, and packaging after detection qualification, so as to obtain the product. The alkyd paint disclosed by the invention has the advantages of high yellowing resistance, excellent overall performance and the like.

The invention provides a direct current electromagnet which comprises a coil, an iron core arranged in the coil in a sleeved mode, a reset spring arranged at one end of the iron core in a sleeved mode and a limiting backseat. The coil, the iron core, the reset spring and the limiting backseat are arranged coaxially. The direct current electromagnet is characterized in that the direct current electromagnet further comprises a closed shell and a relay switch, the coil comprises a first coil body and a second coil body, normal close contacts of the relay switch are connected to the two ends of the second coil body, and the first coil body and the second coil body are connected through a heat protector. According to the direct current electromagnet, the two coil bodies are adopted so that the direct current electromagnet can work continuously for a long time and large operation tensile force can be provided; the two coil bodies are connected through the heat protector so that the direct current electromagnet can work safely in the high-temperature operation environment for a long time; the closed shell is adopted so that the strength and the waterproof performance of the direct current electromagnet can be guaranteed and the direct current electromagnet can work in the humid environment for a long time.

The invention discloses a temperature-resistant EVA hot melt adhesive and a copolymerization reaction device thereof, and belongs to geotechnical engineering investigation equipment. The EVA hot meltadhesive comprises the following components in parts by weight: 80 to 100 parts of basic resin, 20 to 30 parts of a tackifier, 10 to 22 parts of a viscosity regulator, 5 to 10 parts of an antioxidant,0.5 to 5 parts of a silane coupling agent, 10 to 15 parts of a reinforcing agent, 1 to 8 parts of high-tear-resistance silicone rubber, 5 to 17 parts of high-temperature-resistance silicone rubber and 0.01 to 0.3 part of an inhibitor. In the present invention, through mutual cooperation of the high-tear-resistance silicone rubber, the high-temperature-resistance silicone rubber, the inhibitor, the reinforcing agent, the silane coupling agent, a motor, a cylinder rod, an air pump, a flow dividing pipe, a flow dividing cover, a first one-way valve, a second one-way valve, a hydraulic cylinder and a piston which are added or designed, EVA hot melt adhesive ingredients in the polymerization reaction kettle can be stirred and mixed in all directions in the horizontal direction and the verticaldirection, deposition of the EVA hot melt adhesive ingredients at the bottom of the inner side of the polymerization reaction kettle is avoided, the mixing efficiency and the mixing effect are improved, and EVA hot melt adhesive ingredient reaction is more sufficient.

The invention relates to a cleaning and disinfecting tablet for cleaning milk dirt and stains. The cleaning and disinfecting tablet comprises the following raw materials in parts by weight: 5-35 partsof sodium carbonate, 5-30 parts of tartaric acid, 5-40 parts of anhydrous sodium sulfate, 0.5-25 parts of sodium metasilicate, 5-30 parts of sulfamic acid, 1-5 parts of sodium chloride, 5-20 parts ofpolyethylene glycol powder, 0.1-3 parts of magnesium stearate, 0.5 to 15 parts of an anionic surfactant, 0.01 to 8 parts of polyhexamethylene guanidine salt, 0.5 to 5 parts of sodium percarbonate, 0.1 to 5 parts of disodium ethylenediamine tetraacetate, 0.5 to 5 parts of polyvinylpyrrolidone, 0.1 to 5 parts of protease and 0.1 to 5 parts of muramidase. The cleaning and disinfecting tablet has high dissolution speed and good effect of cleaning the milk dirt and stains. Under the condition of extremely low concentration, the sterilization rate on escherichia coli, candida albicans and gonococcus is 100%. The sterilization rate of an on-site sterilization test on the surface of an object is 99.8%. And adverse effects on human cells without cell walls are avoided. Butyric acid fermentation caused by microbial contamination of infant products can be prevented, and milk smell and peculiar smell are reduced. The cleaning and disinfecting tablet is completely non-toxic to human bodies, has noside effect and has an antiviral effect.

The invention relates to the technical field of packaging materials, in particular to a high-strength wear-resistant composite packaging material and a preparation method thereof. The high-strength wear-resistant composite packaging material is prepared from, by weight, 80-120 parts of chlorinated butyl rubber, 60-80 parts of polyvinyl chloride resin, 20-40 parts of carbon nanofibers, 4-8 parts of graphene, 8-12 parts of glass fibers, 18-22 parts of carbon fibers, 16-20 parts of ultra-high molecular weight polyethylene fibers, 3-9 parts of plasticizer, 4-8 parts of methyl silicone oil. 8-12 parts of bamboo fiber, 4-8 parts of a compatibilizer. Through the carbon nanofibers, the glass fibers, the carbon fibers and the ultra-high molecular weight polyethylene fibers, the strength, the stability and the wear resistance of the composite packaging material can be relatively high; and through the methyl silicone oil and the bamboo fibers, the composite packaging material has excellent heat resistance, electrical insulating property, weather resistance, hydrophobicity, physiological inertness and small surface tension, and also has a low viscosity-temperature coefficient and high compression resistance, so that the overall using effect is better.

The invention relates to a true triaxial sand fracturing testing machine, which comprises a confining pressure system and an injecting system, wherein the injecting system comprises a first fracturing fluid container, a second fracturing fluid container and a piston container; two piston sheet baffle plates are arranged in the piston container. A true triaxial sand fracturing testing method comprises the following steps that stirring is performed in the second fracturing fluid container to form sand-carrying fracturing fluid; prepositive fracturing fluid is injected into the first fracturing fluid container; the prepositive fracturing fluid and the sand-carrying fracturing fluid are respectively injected into a middle cavity and an upper cavity of the piston container by pressure; through a first constant-pressure constant-speed plunger pump and / or a second constant-pressure constant-speed plunger pump, water is discharged into a lower cavity of the piston container; the prepositive fracturing fluid, the sand-carrying fracturing fluid and displacement fracturing fluid sequentially enter a downhole core for fracturing; after the fracturing is finished, the downhole core is taken out; the crack expanding condition is observed. The technical scheme is simple and is easy to understand; the operation is convenient and fast; the unified control on the confining pressure system and the injecting system can be realized; the fracturing fluid replacement is convenient.