30results about How to "Excellent resistance to UV radiation" patented technology

An ultra violet radiation resistant environmental protection sheathing material is mainly prepared by the following materials according to the parts by weight: 40-50 pars of polyvinyl chloride resin, 6-8 parts of trioctyl trimellitate, 4-6 parts of dioctyl sebacate, 7-9 parts of dioctylphthalate, 4-6 parts of ca-zn composite stabilizer, 1-1.5 parts of epoxidized soybean oil, 1-1.5 parts of diantimony trioxide, 1-1.5 parts of diantimony trioxide, 10-13 parts of magnesium hydrate, 8-10 parts of refined calcium carbonate, 8-10 parts of titanium dioxide, and 0.3-0.5 parts of ultraviolet absorbent. The invention technically solves the difficult point of compound formulation of the ultra violet radiation resistant white sheathing material, greatly increases the resistance to ultra violet radiation performance of the product, has strong practicability and lays the material foundation for the design and development of resistance to ultra violet radiation coaxial-cables. Based on the resistance to ultra violet radiation white polyvinyl chloride sheathing material, the resistance to ultra violet radiation environmental protection sheathing material technically solves the technical difficulties of resistance to ultra violet radiation performance, softness, UL mechanical physical property, ROHS environment requirements and the like which are difficult to be achieved completely, meets the strict requirements of the application of products on tropical and subtropical regions and has remarkable social effect.

The invention discloses a bending resistant sheath material for wires and cables, and a preparation method thereof. The bending resistant sheath material is prepared by using the following raw materials, by weight, 60-80 parts of natural rubber, 20-40 parts of butadiene rubber, 10-20 parts of smoke sheet rubber, 5-15 parts of polybutylene telephthalate, 20-30 parts of carbon black N774, 1-2 parts of stearic acid, 2-3 parts of zinc oxide, 3-4 parts of sulfur, 1-2 parts of an accelerant CZ, 2-3 parts of an accelerant TMTD, 10-15 parts of a t-butyl phenolic resin, 4-7 parts of microcrystalline paraffin, 1-2 parts of an antioxidant 4020, 1-2 parts of an antioxidant RD, 2-3 parts of N-cyclohexylsulfophthalimide, 3-5 parts of aromatic oil, and 1-3 parts of di-n-butyl tin dichloride. The sheath material has the characteristics of high elasticity, high strength and excellent bending strength, prolongs the service life of a sheath under same conditions, has excellent heat, wear, ageing, ultraviolet, oil, acid and alkali resistances, and has the advantages of durability, complete reliability and wide application prospect.

The invention belongs to the technical field of high polymer materials and discloses a lignin / polyolefin thermoplastic elastomer composite and a preparation method thereof. The composite is prepared from components in percentage by mass as follows: 35%-95% of a polyolefin thermoplastic elastomer, 2%-60% of lignin, 0.5%-8% of an additive A and 0-5% of an additive B. The composite has the tensile strength ranging from 10 MPa to 35 MPa and the elongation at break ranging from 300% to 800%. With addition of lignin and the additives, a non-covalent bond connected energy sacrificial bond function is produced between the phase interfaces of the lignin and the polyolefin thermoplastic elastomer, which promotes dispersion of lignin in the polyolefin thermoplastic elastomer, the interfacial compatibility of the lignin and polyolefin is improved, breaking occurs under the action of external force before covalent bonds break, repeated breaking and reconstruction can be realized, the purpose of improving toughness is achieved, and the problem of poor mechanical performance due to poor compatibility of the lignin and polyolefin is solved.

The invention discloses a deep sea cable, which belongs to the technical field of cables. The deep sea cable comprises a cable core bundle consisting of a plurality of cable cores, wherein each cablecore is twisted by using three stands of high-strength high-modulus polyethylene fibers; and an outer coverage layer woven by 32 stands of high-strength polyamide multifilament is arranged on the periphery of the cable core bundle. The excellent wear and corrosion resistance of the high-strength polyamide multifilament ensures the excellent wear-resistance, sea water corrosion-resistance and ultraviolet radiation-resistance performance of the whole cable; the ultra high strength of the high-strength high-modulus polyethylene fibers increases the tensile strength of the cable and meets the requirements on ultra high strength of the deep sea cable; and the cable cores can be manufactured by a multi-length small-diameter connector-free ultra-long process that ensures that the whole cable is made long enough, avoids connectors and meets the requirements on the ultra high strength of the deep sea cable. The deep sea cable is high in strength, light in weight, wear resistant and corrosion resistant and can be applied to off-shore operation, in particular to oil exploration platforms.

The invention discloses an environmental stress crack-resistant polyethylene sheath material for a power wire and a preparation method thereof. The environmental stress crack-resistant polyethylene sheath material is prepared from the following substances in parts by weight: 80-100 parts of linear low-density polyethylene, 15-20 parts of polystyrene resin, 10-15 parts of polyphthalamide, 4-8 parts of dimethyl silicon oil, 2-3 parts of dibasic lead phosphate, 1-2 parts of calcium stearate, 1-2 parts of zinc stearate, 0.5-1 part of antioxidant 1010, 1-2 parts of antioxidant 168, 2-4 parts of ethylene distearate amide, 4-6 parts of chlorinated paraffin and 3-5 parts of pine tar. The sheath material has the advantages of excellent environmental stress crack resistance, high-low temperature resistance, acid-base resistance, salt mist resistance, ozone aging resistance, ultraviolet radiation resistance, abrasive resistance and tensile strength, is capable of working normally in a working environment at a temperature ranging from 60 DEG C below zero to 105 DEG C, is non-deformable and non-cracking in long-time use, is safe and reliable and is applicable to internal and external sheathes of overhead power wires in the outdoor.

The invention discloses ultraviolet radiation resistant montmorillonite intercalation modified polyurethane paint, and relates to the technical field of special paint. The paint is prepared through the following steps of (1) modifying nanometer SiOx; (2) preparing a titanium dioxide / isocyanate compound; (3) preparing finished product paint. The prepared ultraviolet radiation resistant montmorillonite intercalation modified polyurethane paint has good ultraviolet radiation resistant performance; meanwhile, strong adhesive force, high hydrophobicity and high hardness are realized; the coating film density is high; the comprehensive performance is excellent; the service life is greatly prolonged.

The invention discloses a denoising device for a fan blade. The denoising device comprises a base plate and denoising bristles made from ultra-high molecular weight polyethylene (UHMWPE), wherein the denoising bristles are arranged on the base plate, and after the denoising device is mounted, the bottom surface of the base plate is fixed to the fan blade. The denoising device for the fan blade, disclosed by the invention, adopting the denoising bristles made from the UHMWPE, is great in comprehensive performance and can solve the defects of the existing bristle materials. The denoising bristles are great in mechanical performance, light in mass and great in UV aging resistance, the strength, modulus, weatherability and ultraviolet aging resistance of the denoising bristles are all better than those of the existing bristle materials, the tenacity, aging resistance, strength, low temperature resistance, impact resistance and the like meet performance requirements, the water tolerance, humidity resistance, chemical corrosion resistance and ultraviolet radiation resistance are extremely great, and the problems that the response of the existing denoising technology to air current directions is poor and the denoising effect of the existing denoising assembly is single are solved.

The invention discloses a degradable thin film with a waterproof and moisture permeable function. The degradable thin film is obtained by drying a slurry emulsion, and the slurry emulsion is formed by the following components by weight parts: 70 parts of polyester type polyurethane, 30 parts of polyether polyurethane, 40-50 parts of toluene, 20-30 parts of acetone, 20-30 parts of dimethylformamide, 8-12 parts of diphenylmethane-4,4'-diisocyanate, 1-3 parts of triethanolamine, 1-3 parts of tetra-[beta-(3,5-ditertiary butyl-4-hydroxy phenyl) propionic acid] pentaerythritol ester and 0.2-0.5 part of acrylate polymer; the slurry emulsion is processed by using the following process to form the degradable thin film; and the process comprises the following steps of: coating the slurry emulsion on the surface of silicone oil release paper; and sequentially drying under a low-speed flowing air atmosphere under the conditions of 80-100 DEG C, 110-130 DEG C and 150-180 DEG C to obtain the degradable thin film. The degradable thin film disclosed by the invention guarantees the flexibility and the malleability, and also accelerates the forming of the thin film to improve the moisture permeable performance of the thin film.

An outdoor environment-friendly compact totally-sealed high-voltage vacuum circuit breaker comprises a housing which is obtained through sealing a box body and a cover. The housing is provided with an inflating port. The box body is internally provided with three phase terminals, a circuit breaker operating mechanism and a control mechanism. The left side and the right side of the box body are provided with three phase wire inlet sleeves and three phase wire outlet sleeves which are arranged correspondingly. The left side and the right side of the box body are provided with extending chambers which extend to outside. Each extending chamber is internally provided with three compartments. Current transformers A and B in the compartments correspondingly sleeve the three phase wire inlet sleeves and the three phase wire outlet sleeves. The three phase terminals are respectively provided with an insulating box. Each insulating box is internally provided with an upper vacuum envelope with a static contact, and a lower insulating pull rod which is connected with a dynamic contact in the vacuum envelope. The current transformers A and B are respectively connected with a control mechanism. Furthermore a control mechanism transmits a control instruction to a circuit breaker operating mechanism for controlling an on state and an off state of the circuit breaker. The outdoor environment-friendly compact totally-sealed high-voltage vacuum circuit breaker has advantages of small size, compact structure, high convenience in mounting and debugging, high weather resistance, excellent environment-friendly performance and high economical performance.

The invention discloses a sheathing compound for a cable. The sheathing compound is prepared from the following raw materials in parts by weight: 50 to 70 parts of natural rubber, 20 to 30 parts of butadiene rubber, 5 to 15 parts of polybutylene terephthalate, 20 to 30 parts of carbon black N774, 3 to 5 parts of aluminum stearate, 3 to 6 parts of promotor CZ, 10 to 15 parts of para-tert-butyl phenolic resin, 4 to 8 parts of microcrystalline wax, 2 to 5 parts of anti-aging agent, 2 to 5 parts of N-cyclohexylthiophthalimide, 3 to 5 parts of aromatic hydrocarbon oil, 10 to 15 parts of aluminum hydroxide, 5 to 10 parts of zinc borate, 2 to 5 parts of tripolycyanamide, 4 to 8 parts of encapsulated red phosphorous, 6 to 10 parts of barium sulfate, 6 to 10 parts of nanometer aluminum oxide and 4 to 6 parts of composite filler. The sheathing compound disclosed by the invention has the advantages of excellent properties of heat resistance, wear resistance, ageing resistance, ultraviolet ray radiation resistance, oil resistance, acid-base resistance and the like, and is durable.

The invention provides an aromatic diamine monomer. The aromatic diamine monomer has a structure shown as formula (V), in the formula (V), R1 is selected from alkyl, substituted alkyl, phenyl or substituted phenyl; R2 and R3 are independently selected from hydroxyl or a group disclosed in the invention, and are different from each other; and R4 is selected from hydrogen or a group disclosed in theinvention. Compared with the prior art, the aromatic diamine monomer provided by the invention contains an o-hydroxyl benzophenone structural unit; the o-hydroxyl benzophenone structural unit can beintroduced into a polyimide macromolecular chain through copolymerization; when the material is exposed to an ultraviolet radiation environment, the o-hydroxyl benzophenone structure can absorb ultraviolet light and release the ultraviolet light in the form of heat to prevent or delay the damage of ultraviolet radiation to the polyimide material, so that the obtained polyimide material has excellent intrinsic ultraviolet radiation resistance.

The invention relates to a thin-wall double-layer insulated cable with high voltage resistance, which belongs to the technical field of electric wires and cables, and comprises a conductor, and an inner insulated layer and an outer insulated layer combined outside the conductor sequentially, wherein the conductor is a tinned copper wire with a diameter being 0.1-0.3mm; the inner insulated layer is cross-linked polyolefin; and the outer insulated layer is polyvinylidene fluoride. The thin-wall double-layer insulated cable with high voltage resistance has the advantages that a favorable combination effect between the inner insulated layer and the conductor as well as between the inner insulated layer and the outer insulated layer is realized; the inner insulated layer adopts the cross-linked polyolefin and the outer insulated layer adopts the polyvinylidene fluoride, so that the cable has excellent chemical resistance, high temperature resistance, oxidation resistance, weather resistance, ultraviolet radiation resistance and the like; and when the invention is compared with the prior art, the thicknesses of the inner insulated layer and the outer insulated layer are reduced, so that the weight is reduced, and a wiring space is saved.

The invention discloses a blind window plate with diatomaceous earth and a method for preparing the blind window plate, and belongs to the technical field of blind windows. By the aid of the blind window plate and the method, problems of high cost of wood blind windows, easiness in deformation, combustion and aging and short service lives of PVC (polyvinyl chloride) blind windows and pollution due to the fact that the PVC blind windows are non-degradable after being discarded in the prior art can be solved. The blind window plate comprises, by weight, 100 parts of the diatomaceous earth, 100-120 parts of polypropylene carbonate, 4-6 parts of flame retardants, 3-5 parts of epoxidized soybean oil, 2-4 parts of montmorillonite, 2-4 parts of lignin, 1-2 parts of calcium carbonate, 0.5-1 part of primary antioxidants, 0.1-0.3 part of auxiliary antioxidants and 1-3 parts of ultraviolet absorbents. The blind window plate and the method have the advantages that the blind window plate is green and environmentally friendly, is free of pollutant release, difficult to deform, excellent in ultraviolet radiation resistance, heat stability and mechanical property, good in durability and long in service life, can be degraded after being discarded and is flame-retardant, and harmful gas can be adsorbed by the blind window plate.

The invention discloses a drag-type drone solar cell packaging method based on a mesh FPC bottom plate. The method comprises the following steps: a mesh FPC bottom plate is prepared; an adhesive region is coated on the edge of each mesh hole on the mesh FPC bottom plate; the printed circuit of the mesh FPC bottom plate is printed on a non-adhesive region; Affixing solar cell blocks on each mesh; Acomposite EVA material is used to encapsulate the surface layer of the solar cell block and the area not covered by the solar cell block on the reticulated FPC backplane. An advantage of the presentinvention is that by bonding a solar cell at a mesh of a mesh FPC backplane with printed circuits, The EVA material packaging surface layer is specially modulated, which makes the battery lightweight,easy to fold, store and deploy, reduces the energy consumption of flight dragging, and has excellent performance of temperature difference resistance, melting resistance, deformation resistance, ultraviolet radiation resistance, and so on, and has a greater role in promoting the development of unmanned aerial vehicles.

The invention provides an ultraviolet-irradiation-resistant colorless transparent polyimide film and a preparation method and application thereof. The ultraviolet-irradiation-resistant colorless transparent polyimide film is prepared by compounding PI matrix resin shown as a formula I and a hindered amine UV stabilizer, and the number-average molecular weight of the hindered amine UV stabilizer isnot lower than 1000 g / mol. The composite film prepared by fully mixing the PI matrix resin with the UV stabilizer in a proper proportion has excellent heat-resistant stability, high glass transitiontemperature (Tg), high transparency and excellent UV irradiation resistance. The UV-irradiation-resistant colorless transparent polyimide film can be used as a flexible material to be applied to the high-tech fields of solar cells, flexible printed circuit boards, microelectronics, automobiles and the like.

The invention discloses a nanofiltration membrane used for water purification, a preparation method and application thereof. The nanofiltration membrane comprises a modified PVB porous base membrane and a polyamide ultra-thin desalination layer formed by reaction on one side surface of the modified PVB porous base membrane. The polyamide ultra-thin desalination layer and the PVB porous base membrane are combined by chemical bonds, so that the base membrane and the polyamide separation layer are firmly bonded and the separation layer is complete and free of defects, which solves the problem of the current nanofiltration membrane. The problem of weak binding force caused by simple adhesion combination avoids the degradation of membrane performance such as separation layer defects, shedding, and delamination of the nanofiltration membrane due to operating pressure fluctuations, flow rate changes, and cleaning during long-term operation. or failure issues. The nanofiltration membrane of the present invention has good hydrophilicity, high water flux, double-effect heavy metal removal ability and antibacterial property, excellent swelling resistance and pollution resistance, stable long-term use performance, and is suitable for water purification equipment requiring high filtration accuracy. Especially household water purification equipment.

The invention discloses a drag-type drone solar cell packaging method based on a mesh FPC bottom plate. The method comprises the following steps: a mesh FPC bottom plate is prepared; an adhesive region is coated on the edge of each mesh hole on the mesh FPC bottom plate; the printed circuit of the mesh FPC bottom plate is printed on a non-adhesive region; Affixing solar cell blocks on each mesh; Acomposite EVA material is used to encapsulate the surface layer of the solar cell block and the area not covered by the solar cell block on the reticulated FPC backplane. An advantage of the presentinvention is that by bonding a solar cell at a mesh of a mesh FPC backplane with printed circuits, The EVA material packaging surface layer is specially modulated, which makes the battery lightweight,easy to fold, store and deploy, reduces the energy consumption of flight dragging, and has excellent performance of temperature difference resistance, melting resistance, deformation resistance, ultraviolet radiation resistance, and so on, and has a greater role in promoting the development of unmanned aerial vehicles.

The invention belongs to the technical field of cosmetics, and particularly relates to an apocynum venetum extract and a preparation method thereof, and an anti-ultraviolet anti-oxidation whitening cosmetic and a preparation method thereof. The apocynum venetum extract provided by the invention comprises the following effective components: apocynum venetum essential oil and apocynum venetum polysaccharide, wherein the apocynum venetum polysaccharide has common water-locking and moisturizing effects, also has excellent anti-oxidation and anti-ultraviolet radiation effects, and can protect skinand isolate external irritation, inflammation and ultraviolet pollution; and the apocynum venetum essential oil has excellent tyrosinase inhibition activity, and can further inhibit the generation ofmelanin and play a whitening role. The apocynum venetum extract is applied to the cosmetic, and the cosmetic has the effects of resisting ultraviolet radiation, resisting oxidation and whitening underthe combined action of the apocynum venetum extract and other components.

The invention discloses a reinforced solid core conductor polyvinyl chloride insulation sheath-free dragging-resisting cable. The cable comprises a conductor. A steel core is arranged in the conductor. A polyvinyl chloride insulation layer is arranged outside the conductor. A heat tracing belt is arranged outside the polyvinyl chloride insulation layer. A copper filament shielding layer is arranged outside the heat tracing belt. A polyurethane thermal insulation pipe is arranged outside the copper filament shielding layer. The cable is characterized by low-temperature resistance, wear resistance, ultraviolet radiation resistance, bending and winding resistance and dragging resistance.

The invention discloses a novel ATO (arsenic trioxide) nanometer powder body material used for automobile glass. The novel ATO nanometer powder body material comprises 100-110 parts by weight of ATO powder body, 12-16 parts by weight of reductive iron powder, 8-10 parts by weight of methyl ozone silane, 3-5 parts by weight of glass fiber, 4-6 parts by weight of high-polymerization-degree II type ammonium polyphosphate, 2-4 parts by weight of nanometer silicon carbide, 1-3 parts by weight of nanometer stannic oxide, 3-7 parts by weight of nanometer zinc oxide powder, 3-9 parts by weight of hydroxyethylmethylcellulose ester, 8-10 parts by weight of zinc stearate, 12-18 parts by weight of nano-aluminum and the like. The novel ATO nanometer powder body material has the characteristics of reasonable and scientific ingredient preparation, high mechanical intensity and bending strength, good thermal stability, good thermal insulation effect and excellent antistatic property, fully utilizes the characteristics of each component and has excellent performance, including high temperature resistance, low temperature resistance, impact resistance, ultraviolet light radiation resistance and thelike.

The invention provides a high-toughness electric wire protecting jacket material and a preparation method thereof. The high-toughness electric wire protecting jacket material is prepared from the following components: butadiene rubber, an ethylene-vinyl acetate copolymer, a composite filler, a composite additive, carbon black, modified calcium carbonate, diphenyl isophthalate, paraffin, aluminum oxide, stearic acid metal salt, silicone oil, a cross-linking agent and an antioxidant. The protecting jacket material prepared by the invention has good toughness, heat resistance, abrasive resistance, aging resistance ultraviolet radiation resistance, oil resistance, acid / alkali resistance and the other properties, is durable, is simple in raw materials, wide in source, low in cost, simple in preparation process and suitable for industrial popularization and production.

The invention discloses a blind window plate with diatomaceous earth and a method for preparing the blind window plate, and belongs to the technical field of blind windows. By the aid of the blind window plate and the method, problems of high cost of wood blind windows, easiness in deformation, combustion and aging and short service lives of PVC (polyvinyl chloride) blind windows and pollution due to the fact that the PVC blind windows are non-degradable after being discarded in the prior art can be solved. The blind window plate comprises, by weight, 100 parts of the diatomaceous earth, 100-120 parts of polypropylene carbonate, 4-6 parts of flame retardants, 3-5 parts of epoxidized soybean oil, 2-4 parts of montmorillonite, 2-4 parts of lignin, 1-2 parts of calcium carbonate, 0.5-1 part of primary antioxidants, 0.1-0.3 part of auxiliary antioxidants and 1-3 parts of ultraviolet absorbents. The blind window plate and the method have the advantages that the blind window plate is green and environmentally friendly, is free of pollutant release, difficult to deform, excellent in ultraviolet radiation resistance, heat stability and mechanical property, good in durability and long in service life, can be degraded after being discarded and is flame-retardant, and harmful gas can be adsorbed by the blind window plate.

The utility model relates to a high-performance environment-friendly ultraviolet radiation-resistant sheath material, which belongs to the technical field of cables. It includes the following components prepared by weight: 40-50 parts of SG-2 polyethylene resin, 35-45 parts of chlorinated polyethylene, 18-25 parts of EPDM rubber, 1-2 parts of calcium stearate parts, 1-2 parts of zinc stearate, 2-3 parts of ultraviolet absorber, 1-3 parts of antioxidant, 1-2 parts of antioxidant, 20-35 parts of coated kaolin, 5-8 parts of antimony trioxide , 4-8 parts of dioctyl sebacate, 3-5 parts of turpentine, 5-8 parts of activated calcium carbonate, and 1-2 parts of sulfur. The sheath material of the invention has excellent ultraviolet radiation resistance, good flexibility, excellent physical and mechanical properties and flame retardant properties, and is durable, and solves the technology that is difficult to fully meet the requirements of ultraviolet radiation resistance, physical and mechanical properties, and environmental protection properties. It has huge social and economic benefits.

The invention discloses an insulated anti-interference rubber material, and belongs to the technical field of cables. The insulated anti-interference rubber material is prepared from the following components in parts by weight: 20-35 parts of cis-polybutadiene, 15-40 parts of butyl cyanogen rubber, 8-12 parts of liquid isoprene rubber, 7-9 parts of benzoxazine resin, 15-20 parts of attapulgite, 10-15 parts of carbon black, 3-8 parts of an activator, 1-2 parts of polyethylene glycol, 1-5 parts of polyethylene wax, 5-8 parts of a silane coupling agent, 20-30 parts of kaolin, 15-25 parts of modified auxiliaries, 5-12 parts of a plasticizer, 15-25 parts of light calcium carbonate, 10-15 parts of pottery clay and 5-9 parts of magnesium oxide. The insulated anti-interference rubber material is excellent in ultraviolet radiation resistance, is good in softness, has excellent physical mechanical property and flame resistance, is durable in use, lays a raw material foundation for developing anultraviolet radiation resistant power line sheath, and meets UL and European Union ROHS requirements, and is environmentally friendly.

The invention relates to a packaging film for flexible solar cells, which sequentially comprises a substrate, a barrier layer, an adhesive layer, an adhesion-promoting layer, and a fluorine-containing polymer layer. A layer of adhesion-promoting layer is arranged between the fluorine-containing polymer layer and the bonding layer, and the adhesion-promoting layer is mainly composed of organosilicon compound A containing ultraviolet absorbing groups and organosilicon-modified acrylic polymer B, so The weight ratio of component A to component B is 1:99-50:50, and the obtained packaging film for flexible solar cells has excellent gas barrier properties, moisture and heat aging resistance, thermal shock resistance, and ultraviolet radiation resistance.

The invention discloses a denoising device for a fan blade. The denoising device comprises a base plate and denoising bristles made from ultra-high molecular weight polyethylene (UHMWPE), wherein the denoising bristles are arranged on the base plate, and after the denoising device is mounted, the bottom surface of the base plate is fixed to the fan blade. The denoising device for the fan blade, disclosed by the invention, adopting the denoising bristles made from the UHMWPE, is great in comprehensive performance and can solve the defects of the existing bristle materials. The denoising bristles are great in mechanical performance, light in mass and great in UV aging resistance, the strength, modulus, weatherability and ultraviolet aging resistance of the denoising bristles are all better than those of the existing bristle materials, the tenacity, aging resistance, strength, low temperature resistance, impact resistance and the like meet performance requirements, the water tolerance, humidity resistance, chemical corrosion resistance and ultraviolet radiation resistance are extremely great, and the problems that the response of the existing denoising technology to air current directions is poor and the denoising effect of the existing denoising assembly is single are solved.

The invention relates to a preparation method and application of a polymethyl methacrylate porous microsphere membrane. According to the method, the polymethyl methacrylate porous microsphere membrane is prepared on the basis of a thermally induced phase separation theory. The method comprises the steps of sequentially mixing 5-45% by weight of polymethyl methacrylate, 50-85% by weight of solvents and 2-10% by weight of diluting agents, dissolving at certain temperature, and then defoaming to obtain a polymethyl methacrylate homogeneous-phase solution; preparing the porous microsphere membrane at temperature and humidity within a certain range, wherein the porous microsphere membrane can be directly used for an adsorption column or prepared into an ultrafiltration membrane assembly to selectively remove environmental hormones, and the removal ratio on the environmental hormones is 0.5-50 mg / g.

The invention discloses a sheath material for a signal controlling cable and a preparation method thereof. The sheath material comprises the following raw materials in parts by weight: 65-75 parts of low density polyethylene, 20-30 parts of SG-3 type polyvinyl chloride, 15-25 parts of styrene butadiene rubber, 5-10 parts of HIPS, 10-15 parts of nano calcium carbonate, 8-12 parts of nano kaolin, 5-10 parts of an ultrafine mica powder, 3-6 parts of naphthenic oil, 2-3 parts of sulfur, 1-2 parts of an accelerant M, 1-2 parts of zinc oxide, 3-4 parts of stearic acid, 4-8 parts of phenolic resin, 2-3 parts of an anti-aging agent 1010, 0.5-1 part of tert-butyl peroxybenzoate, 3-5 parts of oxidized polyethylene wax, 4-6 parts of rosin pentaerythrityl ester, 1-2 parts of an accelerant TMTD, 5-10 parts of diisobutyl phthalate, 8-12 parts of dioctyl nylon acid ester, 3-6 parts of a composite filler. The sheath material has good high and low temperature resistance and high tensile strength, also has excellent abrasion resistance, acid and alkali resistance, oil resistance, ozone aging resistance, and ultraviolet radiation resistance, extends the service life of a sheath to a great extent, and widens the application scope.