40results about How to "Improve sticky effect" patented technology

The present invention discloses a weathering resistance modified asphalt waterproof coiled material, wherein a glass fiber felt or polyester felt is adopted as a reinforcement, a weathering resistance modified asphalt layer is coated on the upper surface of the reinforcement, a modified asphalt layer with the characteristic of easy hot melting is coated on the lower surface of the reinforcement, a mineral particle layer is covered on the upper surface of the weathering resistance modified asphalt layer, and a polyethylene film is covered on the lower surface of the modified asphalt layer with the characteristic of easy hot melting. According to the present invention, the weathering resistance modified asphalt waterproof coiled material has characteristics of long service life, high waterproof performance, low construction temperature, reduction of aging of the modified asphalt at the high temperature, and reduction of environment pollution, and can be used for industrial and civil building roofing waterproof projects at different temperatures in different regions.

The invention discloses an antiskid woven cloth, which comprises a substrate polyolefin woven cloth layer, and at least one antiskid layer directly compounded on the surface of the substrate polyolefin woven cloth layer through a laminating method. The antiskid layer comprises the following components, by weight: 50%-85% of polyethylene or polypropylene, 10%-30% of an ethylene-vinyl acetate ester copolymer, and 5%-30% of a polyolefin elastomer. According to the preparation method of the antiskid woven cloth provided by the invention, various polymers are mixed according to different proportions; good antiskid performance of the polyolefin elastomer, and good processing performances of the polyolefin plastics and copolymers thereof are combined. The antiskid layer not only has good stability and viscosity effect, good workability and simple processing method, but also can be well combined with the polyethylene woven cloth substrate. The antiskid layer with good antiskid performance solves the problems of filled woven bags, such as easy slipping during handling process, easy slipping of high stack, easily caused safety hidden troubles and ineffective usage of inventory space.

The invention relates to the technical field of dust-sticking pads, in particular to a bactericidal emulsion pressure-sensitive adhesive, a dust-sticking pad and a preparation method of the dust-sticking pad. The bactericidal emulsion pressure-sensitive adhesive at least comprises the following components in parts by weight: 900 to 1100 parts of acrylate monomers, 0.2 to 2 parts of molecular weight regulators, 10 to 80 parts of surfactants, 0.01 to 0.05 parts of an initiator and 1200 to 1400 parts of deionized water, wherein each surface active agent comprises a quaternary ammonium salt surface active agent. The dust-sticking pad provided by the invention is good in sterilization and antibacterial effect and excellent in dust-sticking effect, a quaternary ammonium salt surfactant is addedas an emulsifier, so that sterilization effect is improved, reaction stability is better, comprehensive performance of a formed pressure-sensitive adhesive is very good, the interface adhesive force and peel strength of the pressure-sensitive adhesive are increased, and the adhesive force and peel strength of the pressure-sensitive adhesive are improved so that unwinding force of the dust-stickingpad is 0.8 to 1.3 N, and the 180 degree stripping force of the dust-sticking pad is 1.5 to 5.5 N.

The invention discloses conductive paint for doors. The conductive paint is prepared from, by weight, 45-55 parts of polyaniline, 18-20 parts of polypyrrole, 25-40 parts of carbon fiber, 7-12 parts of petroleum coke, 8-16 parts of silicon carbide, 20-25 parts of graphite, 6-9 parts of silver powder, 7-11 parts of nickel powder, 20-22 parts of single-walled carbon nanotube, 36-40 parts of stannic oxide, 23-25 parts of zinc oxide, 22-24 parts of sodium pyrophosphate, 4-8 parts of tri-ethyl hexyl phosphoric acid, 16-20 parts of sodium hexametaphosphate, 7-9 parts of sodium carboxymethylcellulose, 11-15 parts of oxidized polyethlene wax, 3-5 parts of pvc resin, 12-16 parts of bismaleimide, 20-25 parts of ethyl acrylate, 6-10 parts of cellulose nitrate and 13-16 parts of terpilenol. The conductive paint for doors has an electromagnetic shielding function, influences of external electromagnetic fields are avoided, material dispersion is uniform, bonding effect is good, and the conductive paint is quite suitable for doors.

The invention belongs to the field of polymer weak gel for a water-based drilling fluid and the preparation thereof and discloses a colloidal polymer, a preparation method thereof and a polymer weak gel drilling fluid. The colloidal polymer is formed by copolymerizing the raw materials according to a free radical solution polymerization method, wherein the raw materials include four monomers, namely alkenyl amide, allyl propyl sulfonic acid, alkenyl ammonium chloride and N,N-methylene bisacrylamide at a certain ratio. The relative molecular mass of the polymer is 20-40 ten thousands. The colloidal polymer disclosed by the invention has an excellent heat-resisting property (capable of resisting a temperature high up to 220 DEG C), is capable of maintaining strong colloidal property in an environment of high temperature and high mineralization degree and has an excellent de-filtration property; a base pulp system added with the polymer has a better rheological property, will not thickenat a high temperature and is capable of meeting the requirements of current deep drilling operations; the preparation method is simple, the condition is mild and the yield is higher.

The invention discloses a light guide plate dust-sticking device which comprises a base, side plates, a first dust-sticking roller, first sliding grooves, a second dust-sticking roller, a third dust-sticking roller, second sliding grooves, a fourth dust-sticking roller, a first spring, a dust-sticking adhesive tape, a saw-tooth strip, a motor, a sliding plate, a collecting box, a first disassembly component and a second disassembly component. Two vertical and mutually parallel side plates are fixedly arranged on the upper portion of the base, the horizontal first dust-sticking roller perpendicular to the side plates is rotatably arranged between the side plates, and the vertical first sliding grooves are formed in opposite sides of the side plates and positioned right above connecting portions of the first dust-sticking roller and the side plates. Compared with the prior art, the light guide plate dust-sticking device has the advantages that dust on a light guide plate can be rapidly and efficiently removed by sticking, sticking efficiency and effects are improved, the dust on the dust-sticking rollers is conveniently cleaned, the labor intensity of workers is reduced, the working performance of the device is improved, and great convenience is brought for machining of the light guide plate.

The invention provides a multifunctional cleaning device, comprising a handle, a rotary drum and a stainless steel supporting rod, wherein the rotary drum is provided with a hair sticking brush, and the hair sticking brush is a tearable type and can effectively clean tiny hairs, fibers and hairs to avoid secondary pollution; the multifunctional cleaning device has the advantages of ingenious design, low cost and convenience for operation; the hair sticking brush can be torn and is convenient to replace after the rotary drum is dirty; the multifunctional cleaning device does not need a power supply, does not need to be washed by water, has no noise, is energy-saving and environment-friendly, has good dust-removing and hair sticking effects and is convenient to store; the handle is retractable and the hairs on a ceiling and a carpet can be conveniently cleaned; the multifunctional cleaning device is convenient for old people and pregnant women to use; and with the adoption of the cuboid rotary drum, dust and the hairs at the corners of a house can be conveniently washed.

The invention discloses a waterproof coil. Glass fiber felt or polyester felt is used as a reinforcement body, the upper face of the reinforcement body is coated with a modified asphalt layer, the upper surface of the modified asphalt layer is coated with a mineral particle layer, and the lower face of the reinforcement body is coated with a thermoplastic polyolefin layer; a modified asphalt rubber layer is arranged between an upper covering surface layer and an intermediate matrix layer; and the modified asphalt rubber layer is composed of the following raw materials of, by weight, 50-62 parts of asphalt, 8-10 parts of SBS synthetic rubber, 15-25 parts of waste rubber powder and 1.5-2.5 parts of softening oil. The waterproof coil is long in service life and good in waterproof performance,aging resistant performance and heat resistant performance.

The invention provides a super-hydrophobic metal / ceramic composite coating with the antibacterial property and a preparation method thereof. The preparation method of the super-hydrophobic metal / ceramic composite coating with the antibacterial property comprises the step: the metal / ceramic composite coating of a micro-nano composite structure is formed on the surface of a Ti-6Al-4V alloy workpiecethrough a double-cathode plasma sputtering deposition technology, wherein process parameters of double-cathode plasma sputtering deposition include that the voltage of a target material is 900-950 V,the voltage of a workpiece is 300-350 V, the space between electrodes is 8-10 mm, the working air pressure is 30-35 Pa, the deposition temperature is 650-800 DEG C, the deposition time is 3.0-3.5 h,a mixed Fe2O3-Al-Cr-Co-Ni-Cu target is adopted as the target material, and the mixed Fe2O3-Al-Cr-Co-Ni-Cu target is prepared from the components: 23.49% of Fe2O3, 7.93% of Al, 15.27% of Cr, 17.33% ofCo, 17.33% of Ni and 18.65% of Cu. According to the super-hydrophobic metal / ceramic composite coating, the surface appearance of the micro-nano composite structure can be formed, and the efficient bactericidal ability is achieved while the super-hydrophobic characteristic is achieved.

The invention discloses an elastomer modified asphalt waterproof coiled material. The elastomer modified asphalt waterproof coiled material is characterized in that glassfiber felt or polyester felt serves as a reinforcing body, the upper face of the reinforcing body is coated with a modified asphalt layer, the upper surface of the modified asphalt layer is coated with a mineral particle layer, and the lower face of the reinforcing body is coated with a polyethylene film; a modified asphalt sizing material layer is arranged between an upper coating face layer and a middle carcase layer; and the modified asphalt sizing material layer is composed of the following raw materials of, by weight, 50-62 parts of asphalt, 8-10 parts of SBS synthetic rubber, 15-25 parts of granular paraffin, 1.5-2.5parts of polypropylene resin. The elastomer modified asphalt waterproof coiled material is long in service life and good in waterproof performance and aging resistant performance.

The invention relates to a tackifying chip-taking bar for drilling fluid and a preparation method. The tackifying chip-taking bar for drilling fluid is prepared by taking the following components by weight part: 120 parts of raw oil, 30 parts of water, 15 parts of alkali, and 30-60 parts of instant tackifier. The prepared tackifying chip-taking bar is of hollow bar shape. The invention has the beneficial effects that (1) the tackifying chip-taking bar provided by the invention has excellent tackifying effect and can obviously increase the chip-taking capacity of the drilling fluid of straight well and small-slope drilling well; (2) when a single bar is connected, the tackifying chip-taking bar provided by the invention can be directly put into a drill pipe and can be scoured and dissolved to form a dense plug for assisting in taking sand following the drilling liquid, the dense pulp is not additionally prepared and the use is convenient; (3) the tackifying chip-taking bar provided by the invention can reduce the solid liquid interface tension, can change the surface adsorption property of the drilling bit and can prevent the drilling bit or drilling tool from being coated with mud.

The invention discloses a pressure bearable plugging agent for a marine drilling fluid and an application method therefor. The pressure bearable plugging agent consists of the following components in parts by weight: 10-20 parts of bauxite powder,10-20 parts of sodium soil, 20-35 parts of coal ash, 20-25 parts of wood fiber powder, 10-15 parts of composite salt-resistant polymer, 10-25 parts of furfural residue powder, and 0.5-1 parts of a crosslinking agent. When in use, 15-25 kg per cubic meter of a pressure bearable plugging agent is added to well drilling mud, then a drilling operation is performed; the pressure bearable plugging agent can greatly improve permeability resistance performance of drilling fluid, so that the drilling fluid and filtrate fluid of the drilling fluid are stooped from infiltrating into a deep portion of an oil-gas layer, thereby realizing near zero fluid loss drilling, and thus basically solving a pollution problem caused by the oil-gas layer in drilling engineering. Meanwhile, as the membrane structure is formed on a shallow surface of a permeable layer, and does not permeate the deep portion of the oil-gas layer; when there is a counter pressure in a wellbore, the plugging agent can be removed by itself; and a recovery value of permeability may be above 90%, thereby effectively protecting an oil-gas layer.

The invention discloses a macromolecular self-adhesive waterproof coiled material. A glass fiber mat or a polyester felt is used as an enhancing body; the upper surface of the enhancing body is coatedwith a modified asphalt layer; a mineral particle layer covers the upper surface of the modified asphalt layer; the lower surface of the enhancing body is coated with a thermoplastic polyolefin layer; a modified asphalt rubber layer is arranged between an upper covering layer and a middle tire body layer, and is prepared from the following raw materials in parts by weight: 50 to 62 parts of asphalt, 8 to 10 parts of reclaimed rubber powder, 15 to 25 parts of waste rubber powder and 1.5 to 2.5 parts of an ethylene-octylene copolymer. The waterproof coiled material disclosed by the invention islong in service life and high in waterproof property, aging resistance and heat resistance.

The invention relates to dust sticking equipment, in particular to surface dust sticking equipment for PCB production. to the technical problem is to provide the surface dust sticking equipment for PCB production which can optimize automation, save manpower, improve the surface dust sticking effect, and improve the working efficiency. According to the technical scheme, the surface dust sticking equipment for PCB production comprises a shell, a moving assembly, a dust sticking rubber roller, a placing assembly and a clamping assembly; the moving assembly is arranged in the shell; the dust sticking rubber roller is rotationally arranged on the moving assembly; the placing assembly is arranged on the moving assembly; and the clamping assembly is arranged on the placing assembly. According to the equipment, a PCB is placed in the placing assembly in the shell by people, the moving assembly is started to drive the dust sticking rubber roller to move downwards, meanwhile, the moving assembly is matched with the clamping assembly, the clamping assembly clamps the PCB, the dust sticking rubber roller moves downwards under the action of the moving assembly, dust sticking work is carried out on the PCB, and the effects of optimizing automation and saving manpower are achieved.

The invention discloses environment-friendly deproteinized natural rubber with constant Mooney viscosity and a preparation method of the environment-friendly deproteinized natural rubber, andbelongs to the technical field of natural rubber processing. The environment-friendly deproteinized natural rubber with constant Mooney viscosity is prepared by adding a certain proportion of alkaline proteaseand a water-based environment-friendly constant-viscosity agent into fresh natural rubber latex. The production method is simple, no pollution is caused, cost is low, and efficiency is high. The Mooney viscosity of the obtained environment-friendly deproteinized natural rubber with constant Mooney viscosity is more stable than that of common constant-viscosity natural rubber in the storage process, the protein content of the environment-friendly deproteinized natural rubber is low, and the adopted alkaline protease is a food additive and is non-toxic and harmless; the adopted water-based environment-friendly constant-viscosity agent is weakly alkaline, safe, non-toxic and non-corrosive, has stable performance under high-temperature and mechanical stirring, is not decomposed; the problemsof decomposition of a traditional hydroxylamine sulfate constant-viscosity agent at high temperature and odor and corrosion are caused by decomposition is solved, and the preparation method is environment-friendly to natural rubber processing plants and downstream natural rubber application plants.

The invention discloses a compound coiled material. A glass fiber mat or a polyester felt serves as a reinforcement body, the reinforcement body is coated with a modified asphalt layer, the upper surface of the modified asphalt layer is coated with a mineral particle layer, and a thermoplastic polyolefin layer is coated below the reinforcement body. The modified asphalt rubber layer is arranged between the upper covering layer and an intermediate carcass layer; and the modified asphalt rubber layer is composed of the following raw materials in parts by weight: 50-62 parts of asphalt, 8-10 parts of reclaimed rubber powder, 15-25 parts of waste rubber powder and 1.5-2.5 parts of softening oil. The waterproof roll disclosed by the invention is long in service life and excellent in waterproofproperty, aging resistance and heat resistance.

The invention discloses a sticky finishing agent and application thereof. The sticky finishing agent is prepared from the following components: 50 to 80 percent of adhesive, 0.2 to 3 percent of antibacterial agent, 0.1 to 2 percent of ammonia water, 0.1 to 2 percent of thickening agent, 0.2 to 2 percent of penetrating agent and 11 to 49.4 percent of water. The sticky finishing agent is applied to a base material in the modes of dipping, coating, spraying, foam dipping and the like, and a wiping material with a dust sticking effect is obtained after drying. The base material comprises a spunlace non-woven fabric, a needle-punched non-woven fabric, a spunbond non-woven fabric, a stitch-bonded non-woven fabric, a textile fabric and the like. The base material treated by the sticky finishing agent has good adhesion to dust, greasy dirt and the like, can be used for cleaning the surfaces of automobiles, furniture, electronics, precision equipment, aviation, steamships and the like, and is high in dust removal efficiency and free of adhesive residues after being wiped.

The invention discloses a macromolecular composite cushion layer and a preparation method of the macromolecular composite cushion layer, the macromolecular composite cushion layer comprises a PP (polypropylene) non-woven fabrics layer (1), a coating layer (2) mixed by PP materials and PE (polyethylene) materials, and a PP woven cloth layer which are compounded in sequence, wherein an anti-skidding layer (4) is arranged on the PP woven cloth layer by the hot spray oil method. According to the macromolecular composite cushion layer, the composite cushion layer can have enough friction by a more environment-friendly method, the contractibility rate of the composite cushion layer is reduced, and the function is more stable.

The invention relates to the technical field of dust-sticking pads, in particular to an anti-static dust-sticking pad and a preparation method thereof. The anti-static dust-sticking pad comprises a dust-sticking pad body, a plurality of nanoscale suction holes are distributed in the surface of the dust-sticking pad body, the anti-static dust-sticking pad is prepared from a component A and a nanoscale suction hole generating liquid, and the component A is prepared from the following raw materials: organic silica gel, hydrogen-containing silicone oil, white carbon black, nano material powder, inorganic conductive powder, an antistatic agent, a dispersing agent, a cross-linking agent, a cross-linking accelerant and color masterbatch. According to the anti-static dust-sticking pad, the plurality of nanoscale suction holes are distributed in the surface of the dust-sticking pad body, the anti-static dust-sticking pad can easily stick dust on the contact surface so that dust-sticking effectsare obtained, the anti-static dust-sticking pad can be washed with water to remove dust on the surface of the dust-sticking pad body, the dust-sticking effect can be recovered after the anti-static dust-sticking pad is dried, the anti-static dust-sticking pad can be recycled so that the service life of the anti-static dust-sticking pad is prolonged, and compared with an existing multi-layer PE gluing pad, the anti-static dust-sticking pad is more environmentally friendly.

The invention relates to the technical field of building waterproofing, and discloses a pre-laid polymer waterproofing coiled material and a preparation method thereof. The pre-laid polymer waterproof roll material includes a carrier, an adhesive layer loaded on the carrier, and a protective layer loaded on the adhesive layer; the thickness ratio of the carrier, the adhesive layer, and the protective layer is 1 : 0.3-0.35: 0.05-0.20; the protective layer is a water-based fluorocarbon coating, and the water-based fluorocarbon coating contains two or more of the following components of tertiary fluorine emulsion, water, filler, pH Regulator, defoamer, thickener, dispersant. The weather resistance and anti-aging properties of the pre-laid polymer waterproof membrane provided by the invention are significantly improved.

The present invention discloses an exhaust gas emission and treatment system comprising a chimney pipe connected to a washing unit through a feeding pipe. The main object of the present invention is to create more disturbance and larger contact area with water before exhaust gas reaches a discharging pipe in a limited cross-sectional area. For this object, one mesh disk of a plurality of layers ofmesh disks is composed of a plate body and a plurality of spherical mesh screens arranged thereon, so that when the exhaust gas passes through the mesh disk, a plurality of spherical mesh screens areformed in one layer and in a plurality of layers and exhaust gas is highly filtrated when the exhaust gas passes through the spherical mesh screens, so that the contact surface area with water when the exhaust gas passes is larger and more sufficient, the effect that exhaust gas is in contact with water during emission is better and exhaust emission is reduced.

The invention provides a motor dust cleaning protector comprising a housing, an ash adhering mechanism, a function disk and a motor. The housing includes a rear frame and a mounting plate; the mounting plate is arranged at one side of the rear frame; the ash adhering mechanism is arranged at the bottom of one side of the mounting plate; blast pipes are arranged at the middle part and top of one side of the mounting plate. The motor is installed inside the housing. The function disk is clamped to one side of the ash adhering mechanism and the ash adhering mechanism includes a button, a clampingblock, a dust adhering net, a pipe body, a pointing indicator, a spring, a transmission bar and a wire wheel set; the dust adhering net is arranged at one end of the pipe body; the button is installed at the middle part of the outer side of the pipe body; and the pointing indicator is arranged at one side of the button. According to the protector provided by the invention, the redesigning after motor removing is not needed; installation of the protector is convenient; the dustproof effect of the protector is good.

The invention discloses a self-adhesive polymer modified asphalt waterproof coiled material. According to the self-adhesive polymer modified asphalt waterproof coiled material, glass fiber felt or polyester felt serves as a reinforcer, the upper face of the reinforcer is coated with a modification asphalt layer, the upper surface of the modification asphalt layer is coated with a mineral particlelayer, and the lower face of the reinforcer is coated with a thermoplastic polyolefin layer; a modified asphalt mastic layer is arranged between an upper cover layer and an middle body layer; and themodified asphalt mastic layer is prepared from the following raw materials in parts by weight: 50-62 parts of asphalt, 8-10 parts of SBS synthetic rubber, 15-25 parts of waste rubber powder and 1.5-2.5 parts of polypropylene resin. The waterproof coiled material disclosed by invention is long in service life and good in waterproof performance and aging resistance.

The invention discloses a weather-resistant modified asphalt waterproof coiled material, which uses glass fiber felt or polyester felt as a reinforcement body, a weather-resistant modified asphalt layer is coated on the reinforcement body, and a heat-melt modified asphalt layer is coated on the reinforcement body. The asphalt layer, the upper surface of the weather-resistant modified asphalt layer is covered with a mineral particle layer, and the lower surface of the easily hot-melt modified asphalt layer is covered with a polyethylene film. The weather-resistant modified asphalt waterproof membrane of the present invention has long service life, high waterproof performance, good aging resistance, low construction temperature, reduces the aging of modified asphalt under high temperature and environmental pollution, and can be used in different regions and environments Roof waterproofing works for industrial and civil buildings under high temperature.

The invention relates to cross-linked starch for drilling fluid and a preparation method thereof. The cross-linked starch for the drilling fluid is prepared through steps as follows: starch and organic phosphonate are esterified in an organic solvent under the presence of a buffer solution, then act with sodium chloroacetate under an alkaline condition and have a cross-linking reaction under the action of an initiating agent and a crosslinking agent, wherein with the weight of raw material starch as a reference, the weight fraction of other raw materials is as follows: organic phosphonate accounts for 5-10%, the organic solvent accounts for 30-40%, sodium chloroacetate accounts for 5-15%, the initiating agent accounts for 0.05-1%, the crosslinking agent accounts for 0.05-0.1% and a basifier accounts for 5-15%. The cross-linked starch for the drilling fluid has the advantages of good filtrate loss reduction, adhesion improvement, temperature resistance, salt resistance and the like and is high in stability.

The invention discloses a fluorescent adhesive for luring insects and a preparation method thereof, and belongs to the technical field of adhesive insect catching. The adhesive can enhance the 300-550nm wave spectrum in reflected light, and the light with the wavelength correspondingly captures different types of insect pests, so that the insect catching effect of the adhesive is improved under the condition that an insect trapping lamp is not specially arranged. When the irradiation light source irradiates from natural light to an electrical light source, insect pest luring of the corresponding spectrum can be completed through the trapper or the trapping sticky plate smeared with the glue. Any light source can enhance the sticky trapping effect of the trapper by smearing the glue to trap different kinds of pests; and the adhesive is not only suitable for storing beetles, but also suitable for indoor and outdoor flies, mosquitoes and winged insects and winged insect crawlers in the forest and fruit industry.

The invention relates to the technical field of building waterproofing, and discloses a pre-laid polymer waterproof coiled material and a preparation method thereof. The pre-laid polymer waterproof coiled material comprises a carrier, an adhesive layer loaded on the carrier and a protective layer loaded on the adhesive layer; the thickness ratio of the carrier to the adhesive layer to the protective layer is 1:(0.3-0.35):(0.05-0.20); and the protective layer is a water-based fluorocarbon coating, and the water-based fluorocarbon coating contains a tertiary fluorine emulsion, water, a filler, a pH regulator, a defoaming agent, a thickening agent and a dispersing agent which are stored in a mixed manner or independently stored. The weather resistance and the aging resistance of the pre-laid polymer waterproof coiled material provided by the invention are remarkably improved.

The invention relates to the technical field of primary processing of natural rubber, and discloses a preparation method of oxidized constant-viscosity natural rubber. Dissolve the oxidized constant viscosity agent in water to prepare a certain concentration of constant viscosity agent solution, add the prepared constant viscosity agent solution to the fresh latex, stir while adding, wait for the latex to solidify and mature for a certain period of time before dehydration, washing, Drying made permanent sticky natural rubber. Adding 200ppm to 400ppm constant viscosity agent to 1000g latex, the storage hardening value of the plastic initial value of the prepared natural rubber during accelerated storage is less than 2, and the storage hardening value of the Mooney viscosity is less than 4. The oxidation constant viscosity agent adopted in the method is safe and non-toxic, the preparation process of the constant viscosity natural rubber is simple, the constant viscosity effect is good, and the production cost is low.