160results about How to "Improves UV resistance" patented technology

The invention relates to the technical field of composite plastic wood, and discloses an environment-friendly composite plastic wood plate and a preparation method thereof.The environment-friendly composite plastic wood plate is prepared from bamboo powder, poly (butylene adipate-co-terephthalate), polylactic acid, a compatilizer, filler, a lubricant, functional fibers and a composite additive, the functional fibers are added, so that the prepared environment-friendly plastic-wood plate has excellent mechanical properties and antibacterial properties, and the situation that the composite plastic-wood plate is eroded by bacteria and molds, and the appearance and the performance of the composite plastic-wood plate are affected badly can be avoided; by adding the composite additive, the prepared environment-friendly plastic-wood plate has excellent impact resistance and ultraviolet resistance, energy can be better absorbed and dispersed when the environment-friendly plastic-wood plate is impacted by external force, and the situation that the service life of the composite plastic-wood plate is shortened due to ultraviolet irradiation in the long-term use process is avoided.

The invention relates to the technical field of asphalt concrete, and discloses an anti-crack asphalt concrete material and a preparation method thereof. According to the asphalt concrete material disclosed by the invention, by adding the reinforcing filler and the composite aerogel, the crack resistance, the service life and the ultraviolet aging resistance of a matrix are remarkably improved; wherein the reinforcing filler is based on the synergistic effect among modified lignin, diatomite and hydrotalcite, the compatibility among modified lignin, diatomite and hydrotalcite is improved by utilizing a silane coupling agent, and the dispersity of the reinforcing filler in a matrix is improved, so that the crack resistance of the matrix is improved, the service life of the matrix is prolonged, and the ultraviolet resistance of the matrix is improved; the composite aerogel has excellent heat insulation performance and a three-dimensional network structure, and the crack resistance of the matrix can be improved through the synergistic effect.

The invention relates to the technical field of polyurethane coatings, and discloses a preparation method of an antibacterial wear-resistant waterborne polyurethane coating, which comprises the following steps: taking concentrated hydrochloric acid, p-phenylenediamine, sodium nitrite, paraformaldehyde, amino-modified nano silicon dioxide and hexamethylene diisocyanate as raw materials; the preparation method comprises the following steps: taking 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide as a raw material, carrying out diazotization coupling reaction, substitution reaction, Mannich reaction and addition reaction to prepare modified polyisocyanate, then taking 9, 10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide and ((2-aminoethyl) azadiyl) dimethanol as raw materials, carrying out substitution reaction to prepare DOPO-based dihydric alcohol, and carrying out reaction to prepare the DOPO-based dihydric alcohol. Finally, the modified polyisocyanate, DOPO-based dihydric alcohol and polyethylene glycol 400 are used as raw materials, an antibacterial wear-resistant polyurethane emulsion is prepared through a prepolymerization reaction and a chain extension reaction, and the prepared polyurethane coating has good antibacterial, anti-ultraviolet, flame-retardant and wear-resistant properties.

The invention relates to a self-repairing invisible car cover and a preparation method thereof, and relates to the technical field of automobile material processing, and the self-repairing invisible car cover comprises the following components in parts by mass: 20-40 parts of fluorine-containing polyol, 15-30 parts of polyisocyanate, 5-10 parts of a composite chain extender, 10-20 parts of self-repairing microcapsules, 1-3 parts of an initiator and 30-50 parts of a solvent. The preparation method comprises the following steps: preparing a self-repairing coating; coating the surface of the transparent substrate with an adhesive to obtain an adhesive layer, and covering the adhesive layer with a release film to obtain a semi-finished automobile cover; and the self-repairing coating is applied to the face, away from the release film, of the semi-finished automobile cover, heating and curing are conducted, the semi-finished automobile cover with a self-repairing coating is obtained, the self-repairing coating is coated with a protective film, and the self-repairing invisible automobile cover is obtained after curing. The automobile cover has the effect of improving the self-repairing performance of the automobile cover, and the automobile cover has good weather resistance, tensile resistance and puncture resistance.

The invention belongs to the technical field of photovoltaic tempered glass, and particularly relates to photovoltaic tempered glass and a preparation method thereof.The photovoltaic tempered glass sequentially comprises tempered glass and a protective coating from bottom to top; the protective coating is prepared from the following raw materials in parts by mass: 20 to 45 parts of fluorine-containing polysiloxane, 10 to 18 parts of tetraethoxysilane, 10 to 20 parts of silicon dioxide / tetrapod-like zinc oxide whisker / alkyl phosphate, 10 to 20 parts of titanium dioxide / polymer molecular brush, 0.5 to 1 part of catalyst and 80 to 120 parts of solvent; the fluorine-containing polysiloxane is obtained by carrying out a reaction on octamethyl cyclotetrasiloxane, decamethyl cyclopentasiloxane and trifluoropropyl methyl cyclotrisiloxane. The photovoltaic tempered glass provided by the invention has super-hydrophobicity, excellent light transmittance, high-temperature and high-humidity resistance, high and low temperature impact resistance and ultraviolet resistance.

The invention relates to the technical field of card protection films, and discloses an anti-ultraviolet card protection film and a preparation process. Nano titanium dioxide is used as an ultraviolet shielding agent to effectively reflect and absorb ultraviolet rays. The isocyanate group on the surface of TDI-modified silicon dioxide can produce a chemical bonding effect with a hydroxyl group of a hydroxyl-containing copolyester, and the bonding force is relatively strong, thereby improving the interface compatibility between the nano titanium dioxide and a substrate, and the ultraviolet transmittance is relatively low, so that ultraviolet light in the medium-wave region and the long-wave region can be better absorbed. The modified polyethylene terephthalate contains units similar to the structure of the card protection film substrate, thereby improving the dispersibility of the nano titanium dioxide in the substrate and weakening the damage of ultraviolet light to polyethylene terephthalate molecules. At the same time, the molecular chain contains a biphenyl aromatic structure, which increases the rigidity of the molecular chain, helps to improve the heat resistance of the polyester, and further prolongs the service life of the card protection film.

The invention provides a back contact photovoltaic cell piece capable of preventing stacking scratch in a high-temperature passivation process. The back contact photovoltaic cell piece comprises a back contact photovoltaic cell piece body and a plurality of soft isolation protrusions located on the light receiving face of the back contact photovoltaic cell piece body. The soft isolation protrusions are used for supporting photovoltaic cells to be mutually isolated when the photovoltaic cells are stacked layer by layer, and the soft isolation protrusions are resistant to high temperature of 300 DEG C and do not become sticky or yellow within 3 hours. According to the invention, the soft isolation projections are arranged on the light receiving surface of the back contact photovoltaic cell sheet body to support mutual isolation of the photovoltaic cell sheets when the photovoltaic cell sheets are stacked layer by layer, so that the photovoltaic cell sheets can be protected from being scratched in the stacking and moving process; the flexible isolation protrusions are arranged on the back contact photovoltaic cell piece, the flexible isolation protrusions can be prevented from scratching the surface of the photovoltaic cell piece due to the specific flexibility of the flexible isolation protrusions, meanwhile, the flexible isolation protrusions can bear the passivation temperature of 300 DEG C or above and do not crack or yellow or adhere to the cell piece, and therefore it can be ensured that the back contact photovoltaic cell piece is subjected to high-temperature passivation in a multi-layer stacking mode, and the passivation efficiency is improved.

The utility model provides a photovoltaic segmented reflection gap film, the gap film from bottom to top comprises an EVA layer, a PET base film layer and a reflective microstructure layer in order, the reflective microstructure layer comprises a plurality of reflective microstructure segments arranged at intervals, the cross section of each reflective microstructure segment is a plurality of continuously arranged triangular prism structures, and the vertex angle of each triangular prism deviates from the EVA layer. According to the photovoltaic segmented reflection gap film, the reflection microstructure layer comprises a plurality of reflection microstructure segments arranged at intervals, short circuit caused by the fact that the reflection gap film is communicated with anodes and cathodes of adjacent battery strings is prevented, and the structural design avoids local short circuit of an assembly caused by the reflection gap film under the condition that the actual effect of the reflection gap film is not affected. The consumption of metal aluminum of the reflective microstructure coating can be further reduced, and the environmental pressure is reduced.

The invention relates to the technical field of metal corrosion prevention, and particularly discloses a titanium alloy bolt surface aluminum coating coating method capable of improving corrosion resistance. A titanium alloy bolt surface aluminum coating coating method capable of improving corrosion resistance comprises the following steps that a titanium alloy bolt is subjected to cleaning and sand blasting pretreatment; the preparation method comprises the following steps: adding the aluminum powder and the benzaldehyde resin into the solvent, mixing and stirring, continuously adding the polytetrafluoroethylene micro powder, the diluent and the self-repairing microcapsule prepared in advance, and continuously stirring until the mixture is uniform, the prepared anti-corrosion aluminum coating is sprayed to the surface of the titanium alloy bolt, after the surface of the coating is dried, curing is conducted for 55 min to 65 min at the temperature of 180 DEG C to 200 DEG C, and the aluminum coating is obtained; the self-repairing microcapsule is prepared by mixing a microcapsule A and a microcapsule B, wherein the microcapsule A is prepared by wrapping a polyurethane prepolymer with polyvinyl butyral as a shell layer, and the microcapsule B is prepared by wrapping a curing agent support with polyvinyl butyral as a shell layer. The aluminum coating prepared through the method has the advantages of being good in corrosion resistance and durability.

The invention provides an environment-friendly biodegradable waterproof coiled material and a preparation method thereof, and belongs to the field of waterproof coiled materials. The coiled material design comprises a plurality of functional layers, and firstly, high-toughness and degradable bio-based fibers and natural fibers are selected in a reinforcing layer so as to provide reliable mechanical properties and environment-friendly characteristics; the waterproof functional layer adopts a renewable bio-based polymer, so that not only is the adaptability of the material improved, but also the mechanical property of the material is enhanced through combination with an inorganic filler; montmorillonite, bentonite and regenerated cellulose are introduced into the layer to serve as filler and have a synergistic effect, so that the waterproof performance, the high temperature resistance and the aging resistance are remarkably improved, and the service life is prolonged. The surface protection layer is made of modified polyurethane, fluorinated polyurethane and organic silicon resin are combined, and hydrophobicity, pollution resistance, heat resistance and ultraviolet resistance are enhanced.

The invention discloses a high-elasticity breathable fabric and a preparation method thereof, and relates to the technical field of fabrics. The preparation method comprises the following steps: firstly, carrying out esterification reaction on fluorinated dihydric alcohol and terephthalic acid to obtain a fluorinated polymer, then carrying out coating modification on nano titanium dioxide by using chitosan to obtain modified nano titanium dioxide with microsphere morphology, adding the modified nano titanium dioxide as a new filler into a molten fluorine-containing polymer, and carrying out electrostatic spinning operation to obtain the modified nano titanium dioxide / fluorine-containing polymer composite material. The preparation method comprises the following steps: preparing a fiber material with a high specific surface area, and carrying out two-for-one twisting, spinning, weaving and other operations on the obtained fiber to finally prepare the high-elasticity breathable fabric. The high-elasticity breathable fabric prepared by the invention has long-acting antibacterial, anti-ultraviolet, water-resistant and stain-resistant effects.

The invention relates to a weather-resistant coating for a photovoltaic module and a preparation method of the weather-resistant coating, and belongs to the technical field of high polymer materials. The modified epoxy resin adhesive comprises the following components in parts by weight: 90-120 parts of modified resin, 5-25 parts of a curing agent, 10-30 parts of a composite filler, 5-10 parts of an auxiliary agent, 5-40 parts of a solvent and 0.5-3 parts of a plasticizer, a benzotriazole structure and a benzophenone group in the modified resin cooperate to enhance ultraviolet resistance and prolong service life, and introduced 1H, 1H-perfluoropropyl methacrylate is short in C-F bond and high in bond energy, so that moisture resistance and corrosion resistance are improved; long-carbon-chain silane in the composite filler modifies nano-zinc oxide, so that super-hydrophobicity is realized, cracks on a resin curing surface are filled, and corrosion resistance and wear resistance are enhanced; in addition, cinnamic acid endows the coating with excellent antibacterial ability, and the weather-resistant coating for the photovoltaic module prepared by the invention not only has good ultraviolet resistance, high temperature resistance and corrosion resistance, but also has excellent water-resistant and antibacterial effects.

The invention discloses an anti-UV and anti-aging master batch for a pesticide-resistant PE net and a preparation method of the anti-UV and anti-aging master batch, the master batch comprises the following components in percentage by mass: 70-80 wt% of matrix resin PE, 2-4 wt% of an anti-UV agent, 1-2 wt% of an antioxidant, 10-15 wt% of a pesticide-resistant agent and 5-12 wt% of an adjuvant, and the invention relates to the technical field of master batches for PE nets. Through scientific and reasonable proportioning, the anti-UV agent, the antioxidant, the pesticide-resistant agent and other additives have a synergistic effect, the pesticide resistance, ultraviolet resistance and aging resistance of the PE net are remarkably improved, uniform distribution of the additives in a PE matrix is guaranteed by using the dispersing agent and the plasticizer, and therefore the overall performance of the master batch is improved, and the service life of the PE net is prolonged. The master batch provided by the invention is suitable for production of various PE nets, and is especially suitable for agricultural protective nets which are used for a long time in high-pesticide and high-ultraviolet environments.

The invention provides a rosmarinic acid and zinc ion double-crosslinking PVA composite film as well as a preparation method and application thereof. The preparation method of the rosmarinic acid and zinc ion double-crosslinking PVA composite film comprises the following steps: (1) mixing rosmarinic acid and a polyvinyl alcohol aqueous solution for reaction to obtain a polyvinyl alcohol / rosmarinic acid initial solution; (2) dialyzing the polyvinyl alcohol / rosmarinic acid initial solution to obtain a polyvinyl alcohol / rosmarinic acid pure solution; (3) mixing the polyvinyl alcohol / rosmarinic acid pure solution with a zinc chloride solution to obtain a polyvinyl alcohol / rosmarinic acid / Zn < 2 + > solution; and (4) drying and dewatering the polyvinyl alcohol / rosmarinic acid / Zn < 2 + > solution to obtain the rosmarinic acid and zinc ion double-crosslinking PVA composite film. The rosmarinic acid and zinc ion double-crosslinking PVA composite film prepared by the method has excellent antibacterial, antioxidant and uvioresistant capabilities and good mechanical properties.

The invention relates to the technical field of photovoltaic materials, in particular to a light conversion agent, a packaging adhesive film and a photovoltaic module. The preparation method of the light conversion agent comprises the following steps: heating and dissolving compound powder as shown in a formula I in a first solvent, cooling and crystallizing, and collecting a solid; the first solvent is prepared from at least one of ethyl acetate, N-methyl-2-pyrrolidone and acetone. The fluorescence quantum efficiency of the light conversion agent provided by the invention at room temperature can reach up to 97.12%, and compared with the existing light conversion agent, the light conversion agent provided by the invention has the advantages of high fluorescence quantum efficiency, good ultraviolet resistance and the like. According to the photovoltaic module prepared by adopting the packaging adhesive film disclosed by the invention, the power of the module can be remarkably improved, and the power attenuation of the module after ultraviolet radiation can be reduced.

The invention relates to a nano-pesticide with photolysis resistance based on enzymatic hydrolysis lignin and a preparation method, and belongs to the technical field of nano-pesticides. The nano-pesticide is a black sphere, the effective particle size is 160-200 nm, the drug loading rate is 35.72%, the nano-pesticide has good photolysis resistance, and the photolysis half-life period is prolonged by 1.56 times compared with that of prothioconazole original drug; the composition is used for rice blast diseases. According to the nano pesticide, enzymatic hydrolysis lignin is used as a carrier, a prothioconazole bactericide is used as a loading drug, and tannic acid and copper ion coatings are used for coating; functional groups such as phenol and ketone in the enzymatic hydrolysis lignin can effectively absorb a large range of ultraviolet rays and reduce ultraviolet radiation, so that the enzymatic hydrolysis lignin has excellent oxidation resistance and ultraviolet resistance; meanwhile, the enzymatic hydrolysis lignin has renewability, environmental protection property and degradability, and the coating of tannic acid and copper ions can further improve the antifungal ability of the nano pesticide, improve the thermal stability of the nano pesticide, increase the release rate of the pesticide and have the ability to reduce the loss of the pesticide.

The invention relates to the technical field of epoxy hybrid new materials, and discloses a high-flexibility epoxy sealant and a preparation method thereof.The sealant is composed of a component A and a component B. The component A is prepared from, by volume, 60-100 parts of silane modified polyether polymer, 0-20 parts of amine curing agent, 0-10 parts of thixotropic agent, 0-5 parts of ultraviolet absorbent, 0-5 parts of dewatering agent and 0-2 parts of catalyst; the component B comprises 60-100 parts of epoxy resin, 0-10 parts of thixotropic agent, 0-30 parts of toner, 0-20 parts of filler and 0-5 parts of diluent. Compared with a common sealant, the MS epoxy hybrid sealant has better bonding universality and excellent ultraviolet resistance and weather resistance, the bonding area is wider due to strong polar groups in molecules, the MS epoxy hybrid sealant can be normally cured in a humid environment, the construction environment is not limited, and the MS epoxy hybrid sealant has practical and practical significance to a certain extent.

The utility model provides a seamless splicing type aluminum ceiling moistureproof structure which comprises a ceiling body, the ceiling body comprises a substrate layer, a first functional layer and a second functional layer, the first functional layer comprises an epoxy resin coating and a polyurethane coating, the second functional layer comprises a fluorocarbon coating and a nanometer waterproof coating, and the nanometer waterproof coating is a polyurethane coating. By arranging the first functional layer comprising the epoxy resin coating and the polyurethane coating, the epoxy resin coating has excellent waterproof and moisture-proof performance, can effectively prevent water from permeating, further has good adhesive force and chemical corrosion resistance, and can protect the surface of the aluminum material from being damaged by oxidation and chemical corrosion; the epoxy resin coating is smooth in surface and easy to clean and maintain, and the polyurethane coating has excellent moisture-proof and waterproof performance, has elasticity and wear resistance, can adapt to thermal expansion and cold contraction changes of the aluminum ceiling body and is not prone to cracking and falling off.

The invention discloses a preparation method of a high-performance anti-ultraviolet water-repellent polyester fiber. The preparation method comprises the following steps: S1, preparing core-shell composite modified particles; s2, preparing a modified finishing liquid; and S3, carrying out dipping treatment on the polyester fiber by adopting the modified finishing liquid, so as to obtain the high-performance anti-ultraviolet water-repellent polyester fiber. The polyester fiber provided by the invention has excellent ultraviolet resistance and water repellency, titanium dioxide and carbon dots are adopted as main components of an anti-ultraviolet agent, and the core-shell composite modified particles with a special structural system are constructed, so that the excellent ultraviolet resistance can be provided, and the polyester fiber has excellent water repellency. The carbon dots are added into the polyester fiber, the adverse effect caused by the photocatalysis of titanium dioxide can be overcome, the water repellency of the polyester fiber can be improved through the carbon dots, the negative effect of the photocatalysis of titanium dioxide is further reduced, and the carbon dots play multiple improvement roles in the polyester fiber.

The application provides a kind of composite modified asphalt with anti-ultraviolet and anti-salt corrosion aging and a preparation method thereof, and the preparation raw materials include base asphalt, linear SBS, GN, LDHs-PABA-CA, a compatibilizer and a stabilizer.The base asphalt is heated to a molten state to obtain molten asphalt.Under the condition of constant temperature heating and continuous stirring, linear SBS is added to the molten asphalt to make linear SBS swell in the molten asphalt, and then shear mixing is carried out to obtain SBS composite modified asphalt.GN and LDHs-PABA-CA are added to the SBS composite modified asphalt and stirred uniformly, and shear mixing is continued to obtain a composite modified asphalt base with anti-ultraviolet and anti-salt corrosion aging.A compatibilizer and a stabilizer are added to the composite modified asphalt base with anti-ultraviolet and anti-salt corrosion aging, and then the mixed system is stirred under constant temperature conditions to obtain a composite modified asphalt with anti-ultraviolet and anti-salt corrosion aging.

This invention discloses a self-cleaning radiative cooling coating based on biomass carbon quantum dots, its preparation method, and its application. The coating comprises a polymer film-forming resin, carbon quantum dots, and hollow glass microspheres; wherein the mass ratio of the polymer film-forming resin to the filler is 1:(0.1-0.5), and the mass ratio of the hollow glass microspheres to the carbon quantum dots is 1:(0.05-0.2). This invention synergistically enhances solar reflectivity through the photoluminescence properties of carbon quantum dots and the scattering properties of hollow glass microspheres, while simultaneously utilizing the synergistic effect of fluorinated resin and modified hollow glass microspheres to endow the coating with superhydrophobic self-cleaning function. A single layer of this coating can achieve a solar reflectivity >92%, mid-infrared emissivity >94%, and contact angle >150°, possessing both efficient daytime radiative cooling and long-lasting self-cleaning performance. It is particularly suitable for passive heat dissipation of outdoor equipment such as new energy vehicle charging piles, and features simple process, environmental friendliness, and excellent performance.

The invention relates to the technical field of building energy conservation, heat preservation and heat insulation materials, and discloses a flame-retardant phase-change heat preservation and heat insulation building material and a preparation method thereof.The preparation method of the flame-retardant phase-change heat preservation and heat insulation building material comprises the following steps that paraffin is loaded in ZnO / CuO hollow microspheres to obtain phase-change microspheres; modifying the phase change microspheres with polydopamine and acryloyl chloride to obtain functionalized phase change microspheres; the preparation method comprises the following steps: carrying out graft polymerization on a phosphorus-containing eugenol compound and 1-amino-5-hexene-2-alcohol on the functionalized phase change microspheres to obtain multifunctional phase change microspheres; polyether polyol, functionalized polyol, myricetin, multifunctional phase-change microspheres and the like are used as raw materials, foaming is performed, and the flame-retardant phase-change heat-preservation and heat-insulation building material is obtained. The flame-retardant phase-change heat-preservation and heat-insulation building material is excellent in heat-preservation and heat-insulation performance, flame-retardant performance and mechanical performance, has anti-ultraviolet performance and antibacterial and mildew-proof performance, can reduce erosion damage caused by external conditions, and prolongs the service life.

The invention provides a sweat-proof quick-dry textile containing a silver ion antibacterial agent and a preparation method of the sweat-proof quick-dry textile. The preparation method of the modified polyester fiber comprises the following steps: S1, blending modified titanium dioxide, modified nano-silver antibacterial powder and polyethylene glycol terephthalate I in a weight ratio of (2-3): (1-2): 15, and extruding by using a screw extruder to prepare modified master batch; s2, blending the modified master batch and the modified fiber forming resin according to the weight ratio of (2-5): 100, and spinning to obtain modified polyester fibers; and (2) blending the modified polyester fibers and cotton fibers in a weight ratio of 100: (35-45) to obtain blended yarns, and weaving by taking the blended yarns as warp yarns and weft yarns to obtain the sweat-proof quick-dry textile containing the silver ion antibacterial agent. The prepared textile is good in anti-ultraviolet, sweat-proof and quick-drying effects.

The utility model relates to a photovoltaic assembly comprising a cell string, the cell string comprises a plurality of slice cells, and the cutting surface of each slice cell is provided with a passivation layer; the photovoltaic module further comprises a plurality of light conversion films, the light conversion films are arranged on the sides of the passivation layers of the slice battery pieces, and the side edges of the light conversion films extend to the surfaces of the slice battery pieces to cover the passivation layers. The light conversion film of the photovoltaic assembly is used for covering the passivation layer, so that the damage of ultraviolet light to the passivation layer is greatly reduced, the ultraviolet resistance of the passivation treatment part of the sliced battery piece is improved, the power of the photovoltaic assembly is increased, and the service life of the photovoltaic assembly is prolonged.

The utility model relates to the field of car cover, especially a high heat insulation ultraviolet resistant car cover. The utility model wants to solve the technical problem to provide a kind of high heat insulation ultraviolet resistant car cover that can synergic barrier ultraviolet and infrared, with high heat insulation and ultraviolet resistant performance, improve the service life. A kind of high heat insulation ultraviolet resistant car cover, including the substrate layer, function layer and protective layer that are sequentially laminated settings;The function layer is alternatively stacked by multiple heat insulation layers and multiple ultraviolet resistant layers;The heat insulation layer is metal sputtering layer or metal oxide nanoparticle layer, for reflecting or absorbing infrared rays;The ultraviolet resistant layer is ultraviolet absorber coating, for absorbing ultraviolet rays. The utility model reaches the effect that synergic barrier ultraviolet and infrared, with high heat insulation and ultraviolet resistant performance, improve the service life.

The invention relates to the technical field of layered composite materials, in particular to a heat-insulating and weather-resistant composite material, a preparation method and application of the heat-insulating and weather-resistant composite material to car clothing. The composite material comprises a three-layer structure including an outer layer film, a middle layer film and an inner layer film, the inner layer film is a PP non-woven fabric, the material is soft, vehicle paint cannot be damaged due to friction, the middle layer film is an EPE foam cotton piece, the heat conductivity coefficient of air in a pore structure contained in the middle layer film is low, the heat insulation effect is good, and the heat insulation effect is good. The outer-layer film is prepared from polyacrylonitrile as a main raw material through electrostatic spinning; polyacrylonitrile has good weather resistance and solarization resistance, polyacrylonitrile is subjected to modification treatment, a waterproof component and an anti-ultraviolet component are introduced, and the anti-ultraviolet performance and the waterproof performance can be improved; a heat insulation component and an anti-oxidation component are added into the modified polyacrylonitrile spinning solution, so that the heat insulation performance and the anti-oxidation performance of the outer layer film can be improved.

The invention discloses a glue-free PET (Polyethylene Terephthalate) composite PVC (Polyvinyl Chloride) film and a preparation method thereof. The glue-free PET composite PVC film is prepared from the following components in parts by mass: 100 parts of PVC resin, 16 to 50 parts of plasticizer, 2 to 8 parts of stabilizer, 0.5 to 2 parts of processing aid, 0.5 to 2 parts of anti-ultraviolet agent and 2 to 10 parts of anti-impact modifier. According to the adhesive-free PET composite PVC film and the preparation method thereof provided by the invention, the polyester plasticizer with high molecular weight is adopted, and the anti-ultraviolet agent is compounded and added, so that the weather resistance and the ultraviolet resistance of the PVC film can be improved; and the acrylate impact modifier is adopted, so that the processability of the product and the toughness of the finished product can be improved. The PET is directly compounded in the PVC calendering production process, so that the double-sided highlight effect of the PVC film is realized, the transparency of the product is high, and the extinction problem in the industry is solved.

According to the construction process, a hopper feeding device, a transmission system, a heating extrusion device, a cooling shaping device, a cutting device, a thread rolling device, a traction device, a grinding device and a sterilization device are arranged. The acupuncture needle prepared from the poly (lactic-co-glycolic acid) material has good non-toxic biodegradability, the acupuncture needle prepared from the poly (lactic-co-glycolic acid) material has good in-vivo biocompatibility, degradation products of lactic acid and glycolic acid can participate in metabolism of a human body, and finally carbon dioxide and water are formed and discharged out of the body. Meanwhile, the material is degraded by organisms and microorganisms in the natural world in the natural environment; by adding the traditional Chinese medicine pigment and adding a small amount of surfactant (phenol polyethylene glycol solvent or zinc naphthenate), the finished acupuncture needle has excellent weather resistance, light resistance, chemical corrosion resistance and ultraviolet resistance.

The invention relates to the technical field of automotive materials, and particularly discloses a long-acting antibacterial automobile roof which comprises a first prefabricated fabric layer, a first non-woven fabric layer attached to the surface of the first prefabricated fabric layer, a polyurethane foam sheet attached to the surface of the first non-woven fabric layer and a second prefabricated fabric layer attached to the surface of the polyurethane foam sheet. The second non-woven fabric layer is attached to the surface of the second prefabricated fabric layer; the first prefabricated fabric layer and the second prefabricated fabric layer are both made of prefabricated fabric, and the first non-woven fabric layer and the second non-woven fabric layer are both made of non-woven fabric. The invention discloses a preparation method of the long-acting antibacterial automobile roof, which comprises the following steps: respectively coating glue between the first prefabricated fabric layer and the first non-woven fabric layer, between the first non-woven fabric layer and the polyurethane foam sheet, between the polyurethane foam sheet and the second prefabricated fabric layer, and between the second prefabricated fabric layer and the second non-woven fabric layer, then stacking, hot-pressing for 1-2 hours at 10-14 MPa, and drying to obtain the long-acting antibacterial automobile roof. The hot pressing temperature is 105-120 DEG C;

The invention belongs to the technical field of papermaking, and provides a modified bacterial cellulose stabilized ASA sizing agent emulsion. The TEMPO oxidized bacterial cellulose nanofiber suspension and the silver ammonia solution are heated to react, and TBC-coated Ag is obtained; dropwise adding TEOS (tetraethyl orthosilicate) into the ethanol dispersion liquid of the TBC (at) Ag, stirring and reacting to obtain TBC (at) Ag (at) SiO2; aSA is added into the TBC (at) Ag (at) SiO2 aqueous dispersion to be sheared and emulsified, and the modified bacterial cellulose stabilized ASA sizing agent emulsion can be obtained. The prepared ASA emulsion can effectively block the influence of environmental factors on the emulsion, the interface stability of the emulsion is remarkably improved, no additional surfactant needs to be added, the sizing process is simpler and more convenient, the long-term stability of the ASA emulsion is effectively improved, a water phase and an oil phase are prevented from being separated, and the water resistance, the antibacterial property and the ultraviolet resistance of paper are improved.