45results about How to "Not easy to become brittle" patented technology

The invention discloses a half-dry rice noodle and a preparation method thereof. The half-dry rice noodle comprises the following raw materials: rice, a starch mixture, a fresh fruit and vegetable paste mixture and a fruit and vegetable powder mixture and is prepared by the following steps of fermentation and preprocessing of the rice, mixing of all raw materials, twin-screw extrusion forming, aging, re-steaming, washing and cutting oof noodles, measuring and packing, post-sterilization, cooling and the like. The half-dry rice noodle prepared by the invention has the advantages of smooth and bright appearance, strong gluten power, good elasticity, natural flavor, long shelf time, clear finished product soup and the like, the breaking rate is controlled to be lower than 2%, and the loss rate of cooking is controlled to be lower than 4%. According to the half-dry rice noodle and the preparation method thereof, the problem of the existing rice noodle of single nutrition is solved; the ingredients rich in protein and vitamins are added in the formula, so that the product has comprehensive nutrients; in addition, any preservative, brightening agent and thickening agent are not added in the product, so that the product prepared by the preparation method has excellent taste and is nutrient and healthy.

The invention relates to a marble slab, in particular to an artificial simulated marble slab and a production method of the artificial simulated marble slab. The invention aims to overcome defects of natural marble and provide the simulated marble slab which has low price, is light, is easy to pave, has no harm and pollution and can replace the natural marble. The simulated marble slab comprises a substrate layer. A priming paint layer, a marble pattern layer and a finish layer are sequentially arranged on the positive face of the substrate layer from bottom to top. The invention also aims to provide a production method of the simulated marble slab, which comprises the following steps of: selecting a substrate; tailoring the selected substrate to a required size; tenoning on tailored substrate; coating priming paint on the positive surface of the substrate; spraying natural marble patterns on the surface coated with the priming paint of the substrate; and coating finish on the surface sprayed with the natural marble patterns of the substrate. The simulated marble slab provided by the invention can be widely applied in multiple industries such as building material, advertisement, furniture, decoration and the like.

The invention relates to a wood board, in particular to an artificial simulated wood board and a production method thereof. The simulated wood board aims to overcome shortcomings of natural wood, is waterproof, moisture-proof, insect-proof, mothproof, anti-crack, harmless and pollution-free, does not deform, and can replace the natural wood. The simulated wood board comprises a base material layer, and a primer layer, a pattern layer made of marble and a finish layer are successively arranged at the front of the base material layer from bottom to top. The invention further provides the production method of the simulated wood board. The production method comprises following steps: selecting a base material; cutting the selected base material into a base material with the required dimension; arranging tenon fasteners on the cut base material; coating primer on the front of the base material; printing textures of natural wood on the surface of the base material coated with the primer; and coating finish on the surface of the base material printed with the textures of the natural wood. The simulated wood board can be paved on floors of various humid environments and public places, and completely overcomes shortcomings that various wood floors are expanded when wetted and are contracted when dried.

The invention discloses a pathological specimen processing method and belongs to the field of specimen processing technology. According to the processing method, sampled pathological tissues successively undergo fixation, dehydration, transparency, wax impregnation, embedding, slicing, staining and mounting so as to obtain a pathological specimen. The fixation is to fix the pathological tissues by the use of a fixative for 4-15 h. The fixative is composed of atractylol, ethoxylated acetylenediol, chlorogenic acid, polyvinylpyrrolidone, sodium chloride, ethyl acetate and pure water. The mounting is to carry out mounting on the stained pathological tissues by the use of a mixture of polyacrylamide, polyvinylpyrrolidone and xylene. According to the invention, toxicity of reagents used in the invention is obviously reduced, the fixation effect is good, degradation and transparency degree are easy to control. Then, the tissues are not easy to deform, embrittle or harden, and mounting is complete and staining is remarkable.

The invention discloses an aerogel polyvinyl chloride material. The aerogel polyvinyl chloride material is prepared from the following raw materials in parts by weight: 80 to 100 parts of polyvinyl chloride resin, 3 to 8 parts of aerogel powder, 20 to 40 parts of calcium carbonate, 0.5 to 2 parts of polyvinyl chloride wax, 5 to 10 parts of ethylene propylene rubber, 0.5 to 1.5 parts of paraffin, 0.4 to 1.5 parts of stearic acid and 4 to 6 parts of a calcium-zinc compound stabilizer. The preparation method of the material comprises the following steps of 1) adding the raw materials into a heating mixer, and carrying out premixing and drying at the temperature of 150 to 180 DEG C; and 2) cooling the dried materials to 40 to 50 DEG C, and then feeding the materials into an extruding machine for extrusion molding. The aerogel polyvinyl chloride material provided by the invention is high in heat insulation property, besides, the cold resistance and the heat resistance are improved, and the preparation process is simple and easy in operation.

The invention discloses a healthcare capsule shell prepared from plants. The healthcare capsule shell prepared from the plants comprises, by mass, 20-30 parts of hydroxypropyl methyl cellulose, 20-30 parts of carrageenan, 10-25 parts of guar gum, 6-12 parts of algal polysaccharides, 2-6 parts of malt extract, 1.4 parts of starch, 40-60 parts of ethanol, 2-5 parts of triethyl ester, 1-4 parts of glycerol, 0.5-1.5 parts of titanium dioxide, 0.1-0.5 part of ethylparaben, 0.2-0.6 part of methylsilicone oil, 70-100 parts of purified water, 2-8 parts of lepidium meyenii Walp. extract, 2-6 parts of pausinystalia macroceras bark and 2-6 parts of wild oats. The healthcare capsule shell prepared from the plants is capable of strengthening the physique of a human body, enhancing immunity of the human body, promoting a taker to better absorb medicines and improving curative effect of the medicines.

The invention discloses a plant hollow capsule which comprises the following ingredients by mass: 20 to 30 parts of hydroxypropyl methyl cellulose, 20 to 30 parts of carrageenan, 10 to 25 parts of alginate, 10 to 25 parts of guar gum, 6 to 12 parts of algal polysaccharides, 2 to 6 parts of carboxyl methyl glucomannan, 1 to 3 parts of a soybean isolate protein, 2 to 6 parts of a malt extract, 1 to 4 parts of starch, 40 to 60 parts of ethyl alcohol, 2 to 5 parts of triethyl ester, 1 to 4 parts of glycerin, 0.5 to 1.5 parts of titanium dioxide, 2 to 5 parts of magnesium stearate, 0.1 to 0.5 part of ethyl hydroxybenzoate, 2 to 5 parts of methyl p-hydroxybenzoate, 0.2 to 0.6 part of methyl silicone oil, 1 to 3 parts of an edible pigment, and 70 to 100 parts of purified water. The plant hollow capsule can reduce environmental pollution, prevents and treats the transmission of diseases, and improves the capsule security.

The invention relates to a povidone-iodine solution and a preparation method thereof. Each 100g of the povidone-iodine solution is mainly prepared from, by weight, 0.02-0.5g of potassium iodate, 0.1-3.5g of potassium iodide, 0.5-5g of PVP, 1-5g of polyethylene glycol, 2-10g of polyurethane, 0.1-5g of sodium alginate, 0.2-0.5g of organic acid, 0.5-3.5g of surfactant, 1-5g of plasticizer and the balance of water and pH regulator. The povidone-iodine solution is safe, reliable, high in stability and good in film forming effect, a film formed by the solution is not high in toughness and less proneto shedding, efficacy is lasting, antibacterial effect is ensured, a lot of labor and medication cost can be saved, and the solution is suitable for extensive dairy cow farms.

The invention discloses plant-extracted hair-blacking essence. The essence is characterized by comprising the following raw materials of water, ethanol, a radix scutellariae extract, a fructus viticisextract, a polygonum multiflorum extract, a tea extract, a ginseng extract, a leonurus extract and methylisothiazolinone. Compared with the prior art, the invention has the following characteristicsthat the adopted natural traditional Chinese medicine extract has no toxic or side effect, is mild and non-irritating, capable of effectively supplementing melanin required by hair, deeply permeatinghair roots, repairing damaged melanocytes and promoting natural generation of melanin, thereby effectively playing a role in blackening and brightening hair; the nutrition required by scalp can be supplemented, and the problem of scalp aging caused by malnutrition of the scalp can be improved; and the essence can supplement nutrition required by scalp, effectively clean and purify the scalp, repair the scalp and balance water-oil conditions of the scalp.

The invention discloses a preparation method of modified starch capable of replacing gelatin and an application of the modified starch. According to the method, a specific rice variety with the amylose content between 25% and 28% and the gel consistency exceeding 70 mm is taken as a basis, and pregelatinized hydroxypropyl rice starch is obtained with a physicochemical combined denaturation method adopting a chemical method for preparing hydroxypropyl starch and a physical method for preparing pregelatinized starch. According to the modified starch prepared with the method, the problem that the application range of conventional starch is limited due to starch retrogradation, starch viscous characteristics, reversible use of starch and the like is solved, the starch can replace animal protein gelatin, and botanical starch empty capsules can be produced.

The invention belongs to the technical field of health care and nursing of chests and particularly relates to a chest relaxing formula, a preparation method and a use method. The formula comprises oenothera biennis oil, taraxacum mongolicum oil, angelica oil, ginseng oil, peppermint oil, camellia oil, peach-kernel oil and rhizoma chuanxiong oil. The formula can be used for tightening skin, enabling the skin to be elastic, removing superfluous fat and effectively relieving physical fatigue. The formula has the overall effects of activating chest blood vessels, tightening the skin, enabling the skin to be elastic, effectively relieving chest fatigue and muscle rigidity, improving the immunity of human bodies, effectively preventing chest diseases, improving vitality of the human bodies, improving sleeping quality and relieving menstrual discomfort, is non-toxic and harmless to the human bodies, is free of side effect and has the actions of reducing weight, building bodies, enlarging breasts, improving the skin and preventing body diseases.

Relating to the technical field of bridge plug preparation, the invention discloses a preparation method of a novel basalt composite bridge plug. The method includes the steps of: 1) crushing 100-300parts of basalt raw material to obtain basalt particles, crushing 200-600 parts of sepiolite raw material to obtain sepiolite particles, and mixing the obtained basalt particles with sepiolite particles to obtain mixed particles. The preparation method of the novel basalt composite bridge plug carries out crushing and mixing on basalt particles and sepiolite particles, and performs high-temperature melting to obtain the composite material. Basalt has good heat resistance and crack resistance, and sepiolite has good heat dissipation performance and acid-alkali resistance, thus greatly improvingthe heat dissipation performance and chemical stability of basalt, also further improving the flexibility of basalt, and making basalt not easy to become brittle. Therefore, the composite material formed by the two achieves the purposes of high temperature stability and high mechanical strength.

The invention discloses biological latex used for papermaking and a preparation method thereof, and belongs to the field of coatings. Glutinous rice starch is taken as a raw material, the characteristic that cyanogroup on the surface of the starch is easy to react with organosilane is used, the quantity of surface hydroxyl groups is reduced, the hydrophobic property is strengthened, and the waterresistance after the biological latex is used for paper surface is improved; the starch after hydrophobic modification is added into environmentally-friendly triethyl citrate and glycerol to be mixedfor carrying out plasticized modification, so that the coating performance of a base material is improved, simultaneously, the addition of a part of petroleum base latex can be replaced, the resourcesare saved, and the purpose of environmental protection is achieved; tetraethoxysilane is taken as a raw material, the toughening improvement performance of the latex is improved, the biological latexis unlikely to embrittle after drying, and the mechanical property of the coating is improved; 1,2-benzisothiazoline-3-one and ammonia water are added for forming a conservation activator for the biological latex, so that the performance of the latex is improved, the latex is prevented from losing efficacy, and the biological latex has an anti-aging effect. The biological latex solves the problemthat paper becomes embrittled and low in ink absorbency after the biological latex is used at present.

The invention discloses a nickel-molybdenum-copper alloy, which is an alloying agent used for smelting pipe line steel, stainless steel and special steel. The alloy comprises: 20 to 45 percent of nickel, 1 to 8 percent of molybdenum, 18 to 50 percent of copper, less than 0.5 percent of carbon, less than 0.05 percent of sulfur, less than 0.05 percent of phosphorus, less than 2.0 percent of silicon and the balance of ferrum. The alloy can be put at one time during the smelting of the pipe line steel and the like and reduce the labor intensity of smelters.

The invention relates to a povidone iodine solution and a preparation method thereof. 100 g of povidone iodine solution is mainly prepared from, by weight, 0.1-3 g of elementary substance iodine, 1-5g of PVP, 1-10 g of polyvinyl alcohol, 2-10 g of polyurethane, 0.1-5 g of sodium alginate, 0.2-5 g of organic acid, 5-35 g of surfactant, 1-3 g of plasticizer and the balance water and pH adjuster. The povidone iodine solution is safe, reliable, high in stability and good in film-forming effect, formed film is high in toughness and does not easily fall off, the drug efficacy is durable, the antibacterial effect is ensured, a lot of labor and drug application cost can also be saved at the same time, and the povidone iodine solution is suitable for large-scale dairy cattle breeding farms.

The invention relates to a fruit and vegetable storage and transportation integrated packaging box. The fruit and vegetable storage and transportation integrated packaging box is characterized by comprising a box body, a sealing cover, foaming shockproof sponge pipes and an inert air bag, clamping grooves are formed in the periphery of the inner bottom face of the box body, the foaming shockproofsponge pipes are evenly distributed and embedded in the clamping grooves, the adjacent foaming shockproof sponge pipes form a heat preservation inner layer, the heat preservation inner layer is attached to the inner wall of the box body, a thermal insulation layer is formed, each foaming shockproof sponge tube is filled with air bag strips; the sealing cover and the box body can realize sealing and covering, and one or two air adjusting pipe is installed on the sealing cover. According to the fruit and vegetable storage and transportation integrated packaging box, the fruit and vegetable storage and transportation box is designed to be a special-shaped vacuum heat preservation interlayer turnover box, inert gas (nitrogen) can be filled in the box to perform preserving freshness on fruits and vegetables, the special-shaped vacuum heat preservation interlayer is light and convenient to transport in the heat preservation process, the shockproof effect on the fruits and vegetables is achieved, and the effects of being convenient to transport and effective in preserving freshness on the fruits and vegetables in the actual transportation process are achieved.

The invention discloses a solid rocket engine modular charging technology for rapid launching. The solid rocket engine modularized power charging technology comprises the following steps that step 1,a plurality of drug blocks are decomposed according to the drug shape of a solid propellant, and a tooling mold is designed according to the sizes of the drug blocks; step 2, the solid propellant is poured into the designed tooling mold for pouring and charging, solidifying and forming are carried out, and demoulding is carried out to obtain prefabricated solid propellant blocks; and step 3, an adhesive is evenly coated between interfaces of the prefabricated solid propellant blocks, and the prefabricated solid propellant block are sequentially charged into the adhesive into an engine casing.The requirements of fast charging and fast launching of a large-scale engine are met through modular charging, the production efficiency of the large-scale solid engine is greatly improved, and the solid rocket engine modular charging technology is particularly suitable for charging tasks of the large-scale solid engine for emergency launching, temporary launching and the like.

The invention discloses a Teflon fireproof gap filling glue, which comprises, by mass, 18-22% of polytetrafluoroethylene fine particles, 14-17% of a phenol formaldehyde resin, 8-11% of a chlorinated polypropylene resin, 6-8% of polymer rubber powder, 3-6% of talc powder, 2-5% of fly ash, 3.5-4.5% of an intumescent flame retardant, 2.4-2.8% of a heat stabilizer, 2.2-2.5% of a catalyst, 1.8-2.1% ofa defoamer, 1.5-1.8% of a plasticizer, 1.2-1.4% of a foam stabilizer, and the balance of aqueous emulsion. The invention further discloses a preparation method of the Teflon fireproof gap filling glue, wherein the preparation method comprises: grinding sieving, heating stirring, sputtering film forming, and heating and cooling. According to the present invention, the Teflon fireproof gap filling glue has advantages of reasonable formula, good bonding strength, good elasticity, aging resistance, oxidation resistance, high-temperature resistance, low-temperature resistance, brittleness resistance, cracking resistance and long service life; and the preparation method is simple, and has characteristics of convenient operation, low requirements on equipment, manpower saving, material resource saving and good promotion effect.

The invention relates to a formula of anti-tarnishing PVC plastic, and the anti-tarnishing PVC plastic comprises the following components in parts by weight: 60 parts of PVC resin, 3 parts of butadiene, 4 parts of alpha-vinyltoluene, 5 parts of maleic anhydride, 4 parts of steary methacrylate, 12 parts of trioctyl trimellitate, 2 parts of calcium stearate, 2 parts of zinc stearate, 7 parts of trimethylolpropane trimethacrylate, 5 parts of dicyclopentadiene dicarboxylic acid sodium salt, 6 parts of dicyclopentadiene dicarboxylic acid potassium salt and 5 parts of acetyl tributyl citrate acetate. The anti-tarnishing PVC plastic has the beneficial effects that the anti-tarnishing PVC plastic does not easily change color in the sun, can persistently keep the original color, and does not easily become fragile; the production efficiency is greatly improved; resources are saved; the cost is reduced; and the anti-tarnishing PVC plastic is abundant in raw material source, free of dust in the molding process, non-toxic and environment-friendly.

The invention relates to cell fixation liquid for flow detection and a use method thereof, and aims to solve the problem that the cell storage time is short after fixation and the cell has much debrisin the prior art. The cell fixation liquid provided by the invention is prepared by mixing paraformaldehyde, glutaraldehyde, phosphate buffer solution and deionized water; a method adopted by the invention comprises the steps of firstly, dyeing a cell, then adding fixation liquid after the dyeing is finished, standing under 4 DEG C and storing in a dark place. Compared to the traditional fixationliquid, the cell fixation liquid provided by the invention has the advantages that the fixation effect is better, the cell can be stored for a longer time after fixation, the cell morphology change is smaller after being stored for 30 days, the clustering is more obvious, the fluorescence intensity has no obvious change, the cell disruption is less, the toxicity is lower and the harm to a human body is smaller. The fixation method provided by the invention has greater advantages than the traditional fixation method, and the expression rate of the cell fixed by the method provided by the invention is more accurate. The cell fixation liquid can be applied to the field of flow detection.

The invention relates to a dandruff removing and itching relieving alopecia preventing and hair growth promoting shampoo and a processing method. The shampoo consists of the following materials in parts by weight: (1) a traditional Chinese medicinal decoction which accounts for 55% in terms of total weight, and (2) adjuvants which account for 45% in terms of total weight. The processing method comprises the following steps: (1) preparing the traditional Chinese medicinal shampoo: 1) crushing traditional Chinese medicines and decocting the traditional Chinese medicines with the addition of water, and separating dregs and liquid; 2) continuing to conduct decocting, separating the dregs and implementing decocting for 20-30min; 3) heating liquid obtained from the second step, sequentially adding sodium dodecyl sulfate and a humectant, implementing stirring, adding a softening agent, sequentially adding a conditioning agent and an antibacterial agent, and implementing stirring; 4) emulsifying the liquid in an ultrasonic emulsifying homogenizer; and 5) cooling the liquid obtained from the step 4), adding a foaming agent to the liquid, implementing stirring, standing by for 60min and filling the liquid. The shampoo, which is prepared from natural Chinese herbal medicines, has various functions of relieving itching, removing dandruff, preventing and treating alopecia, blacking hair, moistening hair, enhancing skin elasticity and the like.

The invention relates to the technical field of plastic production and especially relates to impact-resistant stretch-resistant plastic. The impact-resistant stretch-resistant plastic comprises, by weight, 80-100 parts of PVC resin, 8-20 parts of light calcium carbonate, 15-30 parts of block polyisocyanate, 5-15 parts of dipropylene glycol dimethyl ether, 15-25 parts of organosilicone-modified polyurethane resin and 10-20 parts of deionized water. The PVC resin resists impact, stretch, aging, embrittlement and deformation and satisfies product special performance requirements.

The invention discloses an aerogel polyvinyl chloride material. The aerogel polyvinyl chloride material is prepared from the following raw materials in parts by weight: 80 to 100 parts of polyvinyl chloride resin, 3 to 8 parts of aerogel powder, 20 to 40 parts of calcium carbonate, 0.5 to 2 parts of polyvinyl chloride wax, 5 to 10 parts of ethylene propylene rubber, 0.5 to 1.5 parts of paraffin, 0.4 to 1.5 parts of stearic acid and 4 to 6 parts of a calcium-zinc compound stabilizer. The preparation method of the material comprises the following steps of 1) adding the raw materials into a heating mixer, and carrying out premixing and drying at the temperature of 150 to 180 DEG C; and 2) cooling the dried materials to 40 to 50 DEG C, and then feeding the materials into an extruding machine for extrusion molding. The aerogel polyvinyl chloride material provided by the invention is high in heat insulation property, besides, the cold resistance and the heat resistance are improved, and the preparation process is simple and easy in operation.

The invention relates to a povidone-iodine solution and a preparation method thereof. Wherein, the povidone-iodine solution per 100g is mainly prepared from the following raw materials by weight: potassium iodate 0.02g-0.5g, potassium iodide 0.1g-3.5g, PVP 0.5g-5g, polyvinyl alcohol 1g-5g, 2g-10g of polyurethane, 0.1g-5g of sodium alginate, 0.2g-0.5g of organic acid, 0.5g-3.5g of surfactant, 1g-5g of plasticizer, and the balance is water and pH regulator. The povidone-iodine solution is safe and reliable, has good stability, and has good film-forming effect. The formed film has high toughness and is not easy to fall off. The drug effect is long-lasting. While ensuring the antibacterial effect, it can also save a lot of labor and drug costs, and is suitable for the majority of dairy cows. field.

The invention provides low-temperature-resistant modified PBT and relates to the technical field of high molecular materials. The modified PBT includes: 120-140 parts of PBT, 15-22 parts of pentaerythritol stearate, 6-10 parts of an octene copolymer, 15-25 parts of dioctyl phthalate, 10-15 parts of bromo-polystyrene, 6-13 parts of magnesium hydroxide, 14-17 parts of phenolic resin, 8-15 parts of polytetrafluoroethylene, 11-18 parts of polytrifluorochloroethylene, 16-24 parts of poly-p-xylene, 15-23 parts of polylauryl lactam, 4-8 parts of carbon fibers, 3-8 parts of synthetic plant esters, 4-9 parts of geotechnical cloth, 11-16 parts of an antistatic agent, 6-13 parts of a coupling agent, 12-19 parts of a binding agent, and 9-15 parts of a sterilizing agent. The modified PBT is low in raw material cost and simple in production process, has excellent low-temperature resistance and is suitable for low-temperature work situations.

The invention discloses a low-carbon low-phosphorus nickel-chromium-iron alloy used for stainless acid resistant steel, which is characterized by comprising the following components in weight percent: 12 to 70 percent of nickel, 3 to 12 percent of chromium, less than 0.5 percent of carbon, less than 0.3 percent of sulphur, less than 0.035 percent of phosphorus, less than 2.5 percent of silicon and the balance of ferrum. The invention is mainly suitable for alloying stainless acid resistant steel. The alloy has low carbon and low phosphorus, which can effectively relieve the load of decarburization in the steel-making process, greatly prolongs the pulverization period of the alloy and meanwhile is beneficial to the production demands of clean steel.

The invention belongs to the technical field of baking, and particularly relates to a coffee bean baking system capable of controlling the caffeine content and a baking method thereof. The system comprises: a baking device which is used for baking coffee beans in real time; an ice quenching device which is used for carrying out real-time ice quenching on the roasted coffee beans; a freeze-drying device which is used for drying the ice-quenched coffee beans in real time; and a control device which is used for controlling operation of the baking device, the ice quenching device and the freeze-drying device in real time, so that the cooling time is short, surface oil oxidation and deterioration of the coffee beans are not easy to cause, meanwhile, continuous carbonization of the coffee beans is also avoided, namely, bitter taste is reduced, the coffee beans are not easy to embrittle, people are not easy to get inflamed after drinking the coffee beans;, the quality of commercial cooked coffee beans is improved, and the caffeine content in the cooked coffee beans can be controlled.

The invention relates to a PVC (polyvinyl chloride) impact modifying plasticizer which comprises 80-90 parts of methacrylic acid, 40-55 parts of butadiene, 5-7 parts of phthalic anhydride and 3-5 parts of acetic anhydride. The content of acetic anhydride is 4 parts of. The plasticizer also comprises 3-6 parts of butanol. The PVC plasticizer can enhance the mechanical properties of PVC, and especially greatly enhance the shock resistance; and thus, the product has the advantage of long service life, and can not easily discolor or embrittle. The plasticizer provided by the invention has the advantages of cheap raw materials and lower cost.

The invention provides a low-density PVC pipe added with polyurethane and a preparation method of the PVC pipe. The PVC pipe comprises the following components in parts by weight: 140-160 parts of PVC, 30-50 parts of low density polyethylene, 5-10 parts of bentonite, 3-3.5 parts of an antifoaming agent, 5-8 parts of phenol propane epoxy resin, 2-3 parts of stearic acid, 1-2 parts of pearl micro powder, 0.5-1 part of chitosan, 0.1-0.2 part of paraffin, 1.2-1.6 parts of tributyl phosphate, 0.5-1 part of chromium trioxide, 2-6 parts of calcium carbonate, 2-8 parts of ammonium polyphosphate and 2-8 parts of polyurethane. Because the PVC pipe disclosed by the invention is added with the polyurethane, the adhesive force on the pipe surface is greatly reduced, so that moulds hardly grow. Moreover, because the PVC pipe contains nano-zinc oxide, the antibacterial property of the pipe is obviously improved, the pipe hardly turns brittle, and the influence of bending strength by a temperature change is very small.