136 results about "Urethane acrylate" patented technology

The application discloses a UV light-cured coating composition, a preparation method thereof and application thereof on an aluminum base. The UV light-cured coating composition comprises a UV light-cured primer and a UV light-cured topcoat. The UV light-cured primer is composed of polyurethane acrylate resin, first acrylate monomer, photoinitiator, adhesion promoter and wetting and leveling agent in a specific ratio, and can be directly cured on the surface of an aluminum base without pre-treatment to form a coating layer with excellent adhesion. The formula of the UV light-cured topcoat is optimized, so that when the topcoat is used in combination with the primer, the combination of the topcoat and the primer is effectively promoted, and the coating layer has excellent insulation performance. The UV light-cured coating composition provided by the application can form a composite coating layer with strong adhesion, excellent insulation performance and high stability on the surface of the aluminum base without pre-treatment such as laser texturing or chemical passivation.

The application discloses a kind of bio-based LED light-cured top-dipping pencil paint and its preparation method and application, including the following mass fraction of composition: epoxy acrylate: 27%~40%, epoxy soybean oil acrylate: 12%~15%, di-functional polyurethane acrylate: 8%~30%, dipropylene glycol diacrylate: 10%~20%, fumed silica: 0.2%~0.5%, inorganic filler: 10%~20%, photoinitiator: 5%~10%, auxiliary agent: 0.5%~1%. The pencil paint of the application meets the requirements of relevant laws and regulations for pencil paint export, the bio-based carbon content is greater than or equal to 15%, uses LED lamp to cure, is energy-saving and environment-friendly, the paint film has high flexibility, can be used for eyebrow pencil, and there is no risk of subsidence.

This invention discloses a polyurethane-based photocurable resin lens and its preparation method, relating to the field of optical resin lens technology. It is prepared from the following components in parts by weight: 30-40 parts of fluorosilicone block polyurethane acrylate oligomer, 10-20 parts of polythiol, 1-3 parts of photoinitiator, 0.05-0.1 parts of red pigment, 0.05-0.1 parts of blue pigment, 1-3 parts of additives, 0.5-2.5 parts of functional additives, 20-30 parts of reactive diluent, and 5-8 parts of other monomers; wherein the other monomers are 1,6-hexamethylene diisocyanate and 3,9-divinyl-2,4,8,10-tetraoxaspiro[5.5]undecane compounded in a mass ratio of (3-5):1. This lens, through optimized formulation, achieves a synergistic improvement in optical performance, mechanical properties, and environmental resistance.

This invention belongs to the field of UV-curable optical materials technology, specifically relating to a UV transfer optical adhesive, its preparation method, and its applications. The UV transfer optical adhesive comprises the following components in parts by weight: 25-45 parts of inorganic nano-modified polyurethane acrylate oligomer, 20-40 parts of silicone-modified acrylate oligomer, 25-50 parts of high-transparency acrylate monomer, 5-15 parts of easy-to-release UV-curable resin, 2-5 parts of photoinitiator, 0.2-1 part of leveling agent, and 0.2-1 part of defoamer. This invention solves the problems of poor release properties, high curing shrinkage, poor precision in replicating microstructures, and insufficient resistance to damp heat and yellowing in existing UV transfer adhesives, meeting the stringent requirements of UV optical adhesives in high-end fields such as optical brightening films, automotive displays, and new energy optical devices.

This invention provides a UV-curable coating composition, its preparation method, and its application. The UV-curable coating composition of this invention comprises the following components in parts by weight: 40-60 parts of silicone-modified polyurethane acrylate, 5-30 parts of cyclic ether acrylate or its derivatives, 2-10 parts of silane coupling agent, 30-80 parts of filler, and 0.5-5 parts of photoinitiator; wherein the reaction raw materials for the silicone-modified polyurethane acrylate include the following components in parts by weight: 15-30 parts of isocyanate, 20-100 parts of hydroxyl-terminated polydimethylsiloxane, 20-100 parts of aromatic polyester polyol, and 3-15 parts of end-capping agent. By using hydroxyl-terminated polydimethylsiloxane to modify the polyurethane acrylate, and simultaneously adding cyclic ether acrylate or its derivatives as diluent monomers to the coating composition, the resulting coating exhibits high resistance to damp heat, high strength, and high elasticity.

The present application relates to a kind of water-based paint for leather surface waterproof, belong to coating technical field.The water-based paint is made of the following components: 80 parts polyether sulfone modified polyurethane-acrylate composite resin dispersion, 5 parts crosslinking agent polycarbodiimide, 10 parts anti-adhesive polydimethylsiloxane, 10 parts cosolvent dipropylene glycol methyl ether, 10 parts nano reinforcing material, 1.5 parts amino-terminated hyperbranched polyamide.Core resin dispersion is prepared by grafting onto polyurethane-acrylate skeleton through sulfonated polyether sulfone chemistry.The present application is prepared by unique resin chemical modification and nanocomposite technology, so that the obtained coating has excellent waterproofness, high adhesion, good mechanical strength and anti-aging property, especially suitable for high requirements such as automotive interior, furniture and other leather surface treatment, while meeting environmental protection requirements.

The application discloses a preparation process of high-adhesion EB electron beam curing display cover plate ink, and relates to the technical field of ink preparation. The process uses high-functionality acrylate monomers, polyurethane acrylate prepolymers and an interface coupling agent as main components, realizes excellent adhesion and abrasion resistance to glass and plastic substrates through electron beam irradiation and rapid curing, and meets the requirement of high light transmittance. The process overcomes the problems of insufficient adhesion and high residual monomer of the existing EB curing ink, improves the comprehensive performance of the EB curing ink, and is suitable for the field of high-end display cover plate printing and manufacturing.

This invention discloses a superhydrophobic radiation-cooling polymer coating, its preparation method, and its application. The coating is white and possesses a bicontinuous micro / nano porous structure. It is prepared by a ternary copolymerization reaction of polyurethane acrylate oligomers, acrylate reactive diluents, and vinyl siloxane porogens. The method involves initiating free radical polymerization of monomers in the porogen under ultraviolet light, inducing rapid phase separation, and naturally evaporating the porogen to obtain the coating. This coating exhibits superhydrophobicity without post-treatment, virtually no absorption in the solar spectrum, and near-100% emissivity in the mid-infrared window. Furthermore, the optical properties and superhydrophobicity of the coating are minimally affected by long-term ultraviolet irradiation, thermal aging, acids, and alkalis. This coating can be applied over large areas in high-performance radiation-cooling applications.

The application discloses a preparation method of a forest bio-oil photosensitive resin for 3D printing, and belongs to the technical fields of 3D printing, non-metal additive and photosensitive resin. The application first prepares modified carbon material and forest bio-oil polyurethane acrylate prepolymer; then the forest bio-oil polyurethane acrylate prepolymer is mixed with an active diluent, and a free radical photoinitiator, a cationic photoinitiator and the modified carbon material are added; vortex and ultrasonic dispersion are conducted to obtain a uniform and stable photosensitive resin. The application synthesizes BPUA by taking forest bio-oil as raw material, and combines the modified carbon material to enhance, so that the integrated bio-based 3D printing material with the characteristics of green renewable, low shrinkage, high strength and high toughness and excellent thermal stability is realized.

The application discloses a liquid crystal coating composition resistant to writing and stable in high-temperature driving and a preparation method thereof. The composition comprises a cholesteric liquid crystal, a high-molecular prepolymer mixture of organic silicon modified polyurethane acrylate and modified polyurethane acrylate in a specific ratio, spacer particles, an active monomer mixture, a photoinitiator, an antioxidant and an auxiliary agent. The application optimizes the resin system, so that the cured coating has high mechanical strength and toughness, and the resistance to repeated writing times is increased to more than 1150 times. Meanwhile, the formula is extremely insensitive to temperature changes, and the critical driving voltage at 45 DEG C high temperature only slightly increases by about 0.6 V compared with normal temperature, which is far lower than the increase of about 6.9 V of common products, thereby ensuring the thoroughness and response speed of handwriting erasing in a high-temperature environment. The preparation process of the application is simple, and is suitable for producing liquid crystal handwriting film products with high performance and high reliability.

The present invention concerns an aqueous radiation-curable polyurethane acrylate dispersion comprising: a) a polyurethane acrylate polymer which is the reaction product of: i) from 10 wt.% to 50 wt.% of an isocyanate monomer; ii) from 5 wt.% to 20 wt.% of a polyunsaturated monomer or polyunsaturated oligomer, which has an iodine value of at least 50 g of I2 / 100g of respectively polyunsaturated monomer or polyunsaturated oligomer, and at least one hydroxyl functional group; iii) from 10 wt.% to 55 wt.% of an acrylate functional oligomer which contains at least one (meth)acrylate group and at least one isocyanate-reactive group; and iv) from 1 wt.% to 10 wt. % of a dispersing agent which contains at least one isocyanate-reactive group and at least one group having a hydrophilizing action; dispersed in b) an aqueous continuous phase; and a coating composition and kit-of-parts with a drying agent; and a coated substrate.

This invention discloses a photo / thermal dual-curing bio-based UV ink composition and its preparation method, relating to the field of UV-curable printing materials. It comprises the following raw materials in parts by weight: 100 parts of polypropylene carbonate diol-type polyurethane acrylate oligomer, 5-20 parts of a thermosetting component, 50-150 parts of an reactive diluent, 2-10 parts of a free radical photoinitiator, 0-80 parts of a colorant, and 0-10 parts of other additives; the thermosetting component includes eugenol-furfurylamine type benzoxazine monomer. The UV ink composition obtained by this invention can be heat-treated after photocuring. The polybenzoxazine network is interpenetrated after the formed polyurethane acrylate pre-crosslinked network, forming an interpenetrating or interpenetrating polymer network, and additional crosslinking can occur. This not only improves the strength and flexibility of the ink layer but also effectively enhances solvent resistance and adhesion, resulting in a UV ink composition with excellent overall performance.

This invention relates to a laser-engravable high-gloss black coating for automotive taillights and its preparation method, belonging to the field of coating preparation technology. The formulation of the laser-engravable high-gloss black coating is as follows (by weight): 40-60 parts polyurethane acrylate, 3-5 parts modified nano-bismuth oxide, 3-5 parts trimethylolpropane triacrylate, 1-3 parts 4-methylbenzophenone, 1-2 parts carbon black, and 0.5-1.5 parts leveling agent. The modified nano-bismuth oxide is prepared by treatment with ammonium molybdate solution and grafting with a silane coupling agent. Its layered structure synergistically enhances UV absorption efficiency and weather resistance with the molybdate layer. 4-methylbenzophenone and modified nano-bismuth oxide form a light absorption composite system, which, combined with the high cross-linking density network constructed by trimethylolpropane triacrylate, achieves narrow linewidth laser engraving precision. This invention solves the technical problems of low laser engraving precision, poor adhesion, and insufficient solvent resistance in traditional high-gloss black coatings, and is particularly suitable for precision marking applications such as automotive taillights.

The application discloses a kind of for promoting walnut incision healing and preparation method and application thereof, it is related to walnut cultivation protection technical field.The healing paste is by elastic film-forming base phase 12-35%, high water absorption / water release humidity particle phase 3-12%, hydrophobic water-blocking microphase 5-22%, rheological and interface control phase 1-8%, osmotic pressure and water activity adjustment phase 5-20% and the rest amount of water and preservative etc.composition according to mass percentage;Film-forming base phase includes aqueous polyurethane-acrylate copolymer emulsion and modified polyvinyl alcohol or polyvinyl alcohol-starch blend, humidity particle phase includes crosslinked sodium carboxymethyl cellulose and crosslinked starch or alginate microparticles, hydrophobic microphase includes beeswax, microcrystalline wax, vegetable oil and rosin resin.By preparing each functional phase in turn and assembling in aqueous system, obtain the healing paste suitable for walnut incision protection under different climatic conditions.

The present application relates to the field of adhesive, especially to a kind of UV curing adhesive and preparation method and curing process, by weight parts, including the following components: modified polyurethane acrylate 30-50 parts, composite photoinitiator 3-8 parts, active diluent 20-40 parts, silane coupling agent 1-5 parts, auxiliary 0.5-3 parts;Modified polyurethane acrylate is side chain containing alkenyl end hydroxyl polysiloxane modified polyurethane acrylate, and its number average molecular weight is 2000-4000g / mol.The beneficial effects of the present application are: by the compounding of radical type and cationic photoinitiator, the surface curing of radical type photoinitiator is quickly realized, the cationic photoinitiator has the ability of anti-oxygen inhibition, can realize deep curing, avoid surface tack, ensure that adhesive layer is cured uniformly and completely, and the curing depth can reach more than 0.5mm.

This invention belongs to the field of UV coating technology, and particularly relates to a UV coating that requires no base coat and its preparation method. The raw materials for preparing the coating include the following components by weight: 20–35 parts acrylated epoxy resin, 15–25 parts polyurethane acrylate oligomer, 10–20 parts trimethylolpropane triacrylate, 2–6 parts fluorinated acrylate monomer, 3–8 parts photoinitiator, 0.5–2 parts polyether-modified siloxane leveling agent, 4–12 parts nanocomposite matte filler, 1–5 parts adhesion promoter, and 20–44.5 parts reactive diluent; pre-dispersed by stirring at a speed of 0 min for 20–40 minutes to obtain a premixed slurry; this invention achieves grade 0 adhesion for PET film through the synergistic effect of fluorinated monomer and adhesion promoter, solving the problem of easy peeling of flexible substrates; the fluorinated acrylate monomer achieves a surface tension ≤22 mN / m, realizing excellent hydrophobic and oleophobic properties; the nanocomposite matte filler stabilizes the gloss at 10–30 GU, meeting the requirements of high-end printing; the chemical energy density is 150–300 mJ / cm² (corresponding to 365–405). (nm light source), suitable for high-speed printing equipment.

A resin based material whose composition includes a light-curable mixture of monomers of no more than 35 wt. % of an ethoxylated difunctional bisphenol A dimethacrylate; of no more than 10 wt. % of a methacrylate monomer; of no more than 10 wt. % of a difunctional urethane acrylate; of no more than 0.1 wt. % of an optical brightener; of no more than 5 wt. % of silica particles having methacrylate functionalization layers and having an average particle size of less than about 200 nm; of having more than 40 wt. % of an inert glass; of no more than 15 wt. % of a heavy metal oxide; of no more than 2.5 wt. % of an ultraviolet / visible (UV / Vis) light-photo-polymerization initiator; a colorant; and a stabilizer.

The application discloses a photosensitive resin composition and a preparation method thereof, and particularly relates to the technical field of electronic chemicals. In view of the fact that traditional photosensitive resin is difficult to balance the bending performance and heat resistance, the composition is composed of photosensitive resin, photoinitiator, filler, flame retardant and additive. The core lies in that rigid-flexible synergistic design is performed on polyimide and polyurethane acrylate, and the interface adhesion is enhanced in combination with epoxy resin. In the preparation, a process flow of high-temperature dissolution, medium-temperature mixing, fineness control and segmented curing is adopted. The test shows that the adhesion of the prepared resin composition reaches 5B level, the flame retardant level is V-0, the heat distortion temperature is as high as 185 DEG C, and the bending resistance times are more than 10,000 times. The application realizes synchronous improvement of mechanical flexibility and heat stability without sacrificing photosensitivity, has obvious progressiveness, and is particularly suitable for the fields of flexible electronics and high-end packaging.

This invention discloses a high-elasticity three-dimensional adhesive composition for multiple overprinting and its preparation method, belonging to the field of three-dimensional coating materials technology. The composition comprises a polyurethane-polyurea interpenetrating network polymer emulsion, an organosilicon-modified waterborne polyurethane-acrylate hybrid emulsion, a crosslinking agent, functional composite fillers, a thickener, a dispersant, an antifoaming agent, additives, a pH adjuster, and deionized water. This invention constructs a dual crosslinking system of polyurethane-polyurea interpenetrating network and organosilicon hybrid emulsion, and combines it with rutile titanium dioxide, surface-modified nano-calcium carbonate, and nano-silica functional fillers. Combined with a nonionic polyurethane associative thickener to regulate rheological properties, the adhesive possesses high elastic recovery, anti-blocking properties, and strong thixotropic properties. During multiple overprinting, the adhesive can quickly set, without flowing or collapsing, with strong interlayer bonding, clear three-dimensional edges, and a smooth coating surface with excellent water and solvent resistance.

This invention discloses a polyurethane acrylate-based highly conductive stretchable metal electrode and its preparation method. The stretchable electrode comprises a flexible polymer substrate and a metal thin film layer disposed thereon. The flexible polymer substrate is formed by blending polyurethane acrylate prepolymer, rigid functional monomers, and flexible functional monomers in a specific volume ratio and then curing them under ultraviolet light, exhibiting high Young's modulus, high strain energy density, and high elongation at break. The preparation method of this invention includes preparing a metal thin film on a rigid substrate, spin-coating the above-mentioned blended polymer solution and curing it, and finally peeling off to obtain the electrode. This invention alleviates modulus mismatch and inhibits crack propagation through synergistic regulation of the substrate's mechanical properties, and enhances interfacial bonding through mechanical interlocking and chemical coordination between the substrate and the metal layer, enabling the electrode to maintain high conductivity and structural integrity under large tensile strain. This method is simple, low-cost, and suitable for wearable electronics and biomedical sensing fields.

This invention relates to the field of polymer fine chemical materials and the synthesis technology of special functional waterborne coatings, specifically to an aldehyde-capturing self-healing waterborne coating and its preparation method. The invention discloses an aldehyde-capturing self-healing waterborne coating and its preparation method. This coating uses a side-chain carboxylated ketone-containing waterborne polyurethane-acrylate composite emulsion as the core film-forming material, forming dynamic hydrazone crosslinks with adipic acid dihydrazide, and introducing an epoxy-amine permanent crosslinking network. The side-chain carboxyl groups are derived from maleic anhydride grafted and undergo ring-opening transformation upon contact with water, and are covalently fixed to the polymer side chains, preventing the migration of small molecule acids and ensuring coating storage stability. After the coating cures, environmental moisture triggers the dissociation of side-chain carboxyl groups, releasing protons and catalyzing the dynamic exchange of hydrazone bonds, achieving room-temperature self-healing. Excess hydrazone groups in the coating capture aldehyde pollutants, and the newly generated hydrazone bonds introduce polar groups and crosslinking sites, enhancing network stability.

The invention discloses a high-performance optical component bonding material based on a UV pressure-sensitive adhesive as well as a preparation method and application of the high-performance optical component bonding material. The bonding material is prepared from the following raw materials in parts by weight through UV photocuring: 50 to 85 parts of acrylate mixed monomers, 10 to 40 parts of polyurethane acrylate oligomer, 0.5 to 8 parts of cage type silsesquioxane functional monomers, 0.5 to 5 parts of photoinitiators and 0.1 to 3 parts of cross-linking agents. Wherein the acrylate mixed monomer comprises a soft monomer, a hard monomer and a functional monomer in a specific proportion; according to the scheme, the POSS functional monomer and the polyurethane acrylate oligomer are introduced into a single UV curing system and cooperate with the acrylate monomer, so that a cured adhesive layer has high light transmittance, high bonding strength, excellent stress buffering capacity and efficient gas / water vapor discharge channels at the same time; the adhesive is particularly suitable for reliable bonding of precise optical assemblies such as curved-surface touch screens and optical lenses in a severe environment, and overcomes the defects of traditional bonding materials in the aspects of heat and humidity resistance, stress resistance and multi-base-material universality.

This application provides a modified photocurable oligomer, its preparation method, and a photocurable 3D printing resin. The preparation method of the modified photocurable oligomer includes the following steps: providing an acrylic monomer, a triblock thermoplastic elastomer, a coupling agent, and a polyurethane acrylate; dissolving the triblock thermoplastic elastomer in the acrylic monomer to obtain a block copolymer mixed solution; adding the coupling agent to the block copolymer mixed solution to obtain a modified block copolymer mixed solution; adding the polyurethane acrylate to the modified block copolymer mixed solution, and mixing to obtain the modified photocurable oligomer. The modified photocurable oligomer, its preparation method, and the photocurable 3D printing resin provided in this application use a triblock thermoplastic elastomer as a toughening reinforcing phase, and chemically modify its surface using a coupling agent, enabling it to form a strong chemical bond interface with the polyurethane acrylate after pre-dispersion in the acrylic monomer.

This invention discloses an environmentally friendly coating containing negative oxygen ions and its preparation method, belonging to the technical field of negative oxygen ion coatings. Nano-cerium oxide is obtained by co-precipitating and calcining a ligand and a cerium source; plant straw powder is impregnated with an activator, swollen, dried, and carbonized to obtain an activated carbon carrier; the activated carbon carrier, nano-cerium oxide, nano-tourmaline powder, dispersant, and deionized water are mixed, and a sodium silicate aqueous solution is added, followed by extrusion granulation and heat preservation treatment to obtain a negative oxygen ion agent; the negative oxygen ion agent is grafted with KH570 to obtain a modified negative oxygen ion agent; difunctional polyurethane acrylate, active monomer, active diluent, modified negative oxygen ion agent, wetting and dispersing agent, defoamer, leveling agent, antioxidant, and photoinitiator are mixed and stirred evenly in the dark to obtain an environmentally friendly coating containing negative oxygen ions; this invention improves upon the problems of low release efficiency, poor durability, easy agglomeration and sedimentation of inorganic powders, and poor compatibility with coating resins in existing negative oxygen ion coatings.

This invention relates to the field of adhesive technology, specifically to an interface-stabilizing adhesive for silicon anodes and its preparation method. The adhesive comprises curcumin-modified silicon-containing waterborne polyurethane-acrylate, a terpolymer, and a multifunctional monomer, wherein the mass ratio of the curcumin-modified silicon-containing waterborne polyurethane-acrylate, the terpolymer, and the multifunctional monomer is 3-5:1-2:1-1.2. The curcumin-modified silicon-containing waterborne polyurethane-acrylate is synthesized using acrylate and γ-methacryloyloxypropyltrimethoxysilane as modifiers and curcumin as a chain extender via an interpenetrating polymer network method. Through chemical bonding such as grafting and crosslinking, and supramolecular interactions such as hydrogen bonding and coordination, an intelligent network integrating elastic buffering, rigid support, interface passivation, self-healing, and ion conduction is constructed. After cycling, the electrode thickness expansion rate is controlled to <40%, with no macroscopic cracks and high electrode peel strength retention.

This application relates to the field of surface treatment technology, and more specifically, to a UV transfer printing process for a high-wear-resistant matte-textured laptop frame. The process involves: 1) applying a wear-resistant UV double-curing adhesive to a laptop frame substrate, heating to remove the solvent, forming a pre-cured adhesive layer; 2) bonding a pre-formed matte-textured and electroplated transfer film to the pre-cured adhesive layer on the laptop frame substrate, followed by UV transfer, peeling, and then applying another layer of wear-resistant UV double-curing adhesive for curing, resulting in a high-wear-resistant matte-textured laptop frame. The wear-resistant UV double-curing adhesive is composed of the following raw materials by weight percentage: 3-8 parts functional dispersion; 30-40 parts polyurethane acrylate resin; 10-20 parts reactive diluent; 1-3 parts UV initiator; and 0.1-0.5 parts thermal initiator. This application offers advantages such as good transfer effect and wear resistance.

This invention relates to the field of organic materials technology, specifically to a high-strength, on-demand debonding UV-curable adhesive, its preparation method, and its applications. The adhesive is prepared using raw materials including: disulfide-bonded polyurethane acrylate oligomers, disulfide acrylic acid reactive monomers, acrylic diluents, photoinitiators, and coupling agents. This invention employs a two-step method to synthesize the disulfide-bonded polyurethane acrylate oligomers. The oligomers are mixed with photoinitiators, disulfide acrylic acid molecules, reactive diluents, and silane coupling agents in a specific ratio. After vacuum degassing in the dark, the mixture is coated onto the surface of the bonded parts and cured by UV irradiation for 1 minute. This method features mild reaction conditions, a simple preparation process, high raw material conversion rate, and high product purity, effectively solving the problem of controllable debonding in existing UV-curable adhesives. It is suitable for temporary fixation of precision devices and material recycling applications.

The application belongs to the technical field of battery pole piece, and specifically discloses an edge insulation protective light-curing jet printing ink, a preparation method and application thereof. The raw materials of the ink include 20-60 parts of light-curing prepolymer, 30-70 parts of active diluent, 1-8 parts of photoinitiator and 0.4-3 parts of additive. The light-curing prepolymer includes a functionalized polymer containing polyolefin oligomer and / or polyolefin acrylate, and at least one of polyurethane acrylate resin, pure acrylate resin, epoxy acrylate resin and polyester acrylate resin. The active diluent includes mono- / poly-functional acrylate. The additive is at least one of leveling agent and thiol compound. The ink has the advantages of fast curing speed, excellent flexibility, self-supporting, wear resistance and corrosion resistance, and can be suitable for inkjet printing coating process, and has the advantages of high efficiency, almost 100% utilization rate, precise coating of the edge of the pole piece, good mechanical properties of the film layer and the like.