CN111015535B - Precise polishing film with special structure and preparation method thereof - Google Patents

Precise polishing film with special structure and preparation method thereof Download PDF

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CN111015535B
CN111015535B CN201911275171.4A CN201911275171A CN111015535B CN 111015535 B CN111015535 B CN 111015535B CN 201911275171 A CN201911275171 A CN 201911275171A CN 111015535 B CN111015535 B CN 111015535B
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coating
grain
abrasive
area
water
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CN111015535A (en
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方红
张航海
卞振伟
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DONGGUAN GOLDEN SUN ABRASIVES CO LTD
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DONGGUAN GOLDEN SUN ABRASIVES CO LTD
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/001—Manufacture of flexible abrasive materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/02—Backings, e.g. foils, webs, mesh fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/04—Zonally-graded surfaces
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D161/00—Coating compositions based on condensation polymers of aldehydes or ketones; Coating compositions based on derivatives of such polymers
    • C09D161/04—Condensation polymers of aldehydes or ketones with phenols only
    • C09D161/06—Condensation polymers of aldehydes or ketones with phenols only of aldehydes with phenols
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D163/00—Coating compositions based on epoxy resins; Coating compositions based on derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D4/00—Coating compositions, e.g. paints, varnishes or lacquers, based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; Coating compositions, based on monomers of macromolecular compounds of groups C09D183/00 - C09D183/16
    • C09D4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09D159/00 - C09D187/00
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/20—Diluents or solvents
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
    • C09D7/40—Additives
    • C09D7/60—Additives non-macromolecular
    • C09D7/61—Additives non-macromolecular inorganic
    • C09D7/62—Additives non-macromolecular inorganic modified by treatment with other compounds
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2227—Oxides; Hydroxides of metals of aluminium
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

Abstract

The invention relates to the technical field of polishing films, in particular to a precise polishing film with a special structure and a preparation method thereof, wherein the precise polishing film comprises a substrate layer and a coating arranged on the surface of the substrate layer, abrasive materials are distributed in the coating, the coating comprises a microgroove area and a sparse groove area which are arranged at intervals, the abrasive material distribution density of the microgroove area is greater than that of the sparse groove area, and the interval distance between the adjacent microgroove area and the sparse groove area is 20-200 mu m. The precision polishing film is novel in structure, the dense grain area enhances the grindability of a workpiece through the arrangement of the dense grain area and the sparse grain area, the ground workpiece scraps are led out through the sparse grain area, the polishing efficiency and the polishing effect are prevented from being influenced due to the fact that the ground scraps are blocked on the polishing film, the polishing efficiency of the polishing film can be effectively improved, and the phenomena of scratching, dents and the like are avoided due to the interval arrangement of the strong and weak grinding effects.

Description

Precise polishing film with special structure and preparation method thereof
Technical Field
The invention relates to the technical field of polishing films, in particular to a precise polishing film with a special structure and a preparation method thereof.
Background
In the current precision polishing products, in order to ensure the coating performance and the adhesive force of a plastic film base material, a general precision polishing film in the industry adopts a solvent type resin adhesive, but the solvent type resin adhesive can release VOC, pollute the environment and is not beneficial to environmental development.
In addition, the precision polishing film generally used in the industry is flat and the abrasives are uniformly distributed, and the flat surface has a low polishing rate although the polishing Ra value is relatively small, so that the precision polishing film is not suitable for a process with high requirements on the polishing rate.
Meanwhile, the general precision polishing film production in the industry mainly adopts a multi-roll coating mode and a scraper coating mode; the multi-roller type coating product has high precision, but the structure is complex, the requirements on the surface finish degree and the concentricity of the coating roller, the equipment adjusting precision, the bearing configuration and the like are high, the requirements on operators are high, and the production efficiency is reduced; the scraper type coating structure is simple, but the precision is difficult to control, and the scraper type coating structure is not suitable for producing a polishing film with high precision.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide the precise polishing film with the special structure, the polishing film is novel in structure, the grinding performance of a workpiece is enhanced by the dense grain region through the arrangement of the dense grain region and the sparse grain region, and the grinding dust of the ground workpiece is led out through the sparse grain region, so that the polishing efficiency and the polishing effect are prevented from being influenced due to the fact that the grinding dust is blocked on the polishing film, the polishing efficiency of the polishing film can be effectively improved, and the phenomena of scratching, dents and the like of the ground workpiece are avoided due to the interval arrangement of the strong and weak grinding effects.
The invention also aims to provide a preparation method of the precise polishing film with the special structure, which has the advantages of simple operation, easy control, high production efficiency and low production cost, can ensure that the prepared precise polishing film has stable quality, can uniformly polish workpieces, and can be produced in a large scale.
The purpose of the invention is realized by the following technical scheme: the precision polishing film with the special structure comprises a base material layer and a coating arranged on the surface of the base material layer, abrasive materials are distributed in the coating, the coating comprises a microgroove area and a sparse groove area which are arranged at intervals, the abrasive material distribution density of the microgroove area is larger than that of the sparse groove area, and the interval distance between the adjacent microgroove area and the sparse groove area is 20-200 mu m. In particular, adjacent microgroove regions may be spaced apart from the striation regions by a distance of 20 μm, 60 μm, 120 μm, 160 μm, or 200 μm.
The precision polishing membrane is novel in structure, due to the arrangement of the dense grain region and the sparse grain region, the sparse and dense alternate grains generate micron-sized vibration during polishing, the cracking and the peeling of workpiece materials during polishing can be accelerated, namely, the process of generating abrasive dust is generated, so that the polishing efficiency is improved, the abrasive dust of the polished workpiece can be led out through the sparse grain region, the polishing efficiency and the polishing effect are prevented from being influenced due to the fact that the polishing powder is blocked on the polishing membrane, the polishing efficiency of the polishing membrane can be effectively improved, the polishing effect is strengthened and weakened, the phenomena of scratching, dents and the like are avoided due to the interval arrangement, and the precision polishing membrane is high in practicability.
Preferably, the ratio of the abrasive distribution density of the microgroove area to the abrasive distribution density of the sparse groove area is 10-50: 1; the dense-line area and the sparse-line area are both in a stripe shape. Specifically, the ratio of the abrasive distribution density of the microgroove region to the abrasive distribution density of the sparse region is 10:1, 20:1, 30:1, 40:1, or 50: 1.
Preferably, the thickness of the substrate layer is 50-200 μm; the thickness a of the highest part of the dense grain area of the coating is 1.5-3 times of the grain size of the abrasive; the thickness b of the lowest part of the sparse-grain area of the coating is 1-1.5 times of the grain diameter of the abrasive.
According to the invention, the thicknesses of the substrate layer, the dense-grain region and the sparse-grain region are strictly controlled, so that the cross section of the prepared coating is wavy, the dense-grain region with larger thickness can polish a workpiece strongly, the sparse-grain region with relatively smaller thickness can polish the workpiece weakly, and the strong-weak polishing is carried out at intervals, so that the polishing and polishing effects on the surface of the workpiece can be improved, the phenomena of scratches, dents and the like are avoided, and the sparse-dense alternate grains can generate micron-sized vibration during polishing, so that the cracking and stripping of the workpiece material during polishing can be accelerated, namely, the process of generating abrasive dust is accelerated, and the polishing efficiency is improved. Specifically, the thickness of the substrate layer is 50 μm, 100 μm, 120 μm, 150 μm, or 200 μm; the thickness a of the highest part of the dense grain area of the coating is 1.5 times, 2 times, 2.5 times or 3 times of the grain size of the abrasive; the thickness b of the lowest part of the sparse-grain area of the coating is 1 time, 1.2 times, 1.3 times or 1.5 times of the grain diameter of the abrasive. When the thickness a of the highest part of the dense-grain region is 1.5 times of the abrasive grain diameter, the thickness b of the sparse-grain region is not 1.5 times of the abrasive grain diameter, namely, the thickness a of the dense-grain region is not equal to the thickness b of the sparse-grain region.
Preferably, the coating is prepared from a water-based paint, and the water-based paint comprises the following raw materials in parts by weight:
Figure BDA0002315362250000031
according to the invention, the water-based paint is prepared by adopting the materials, water is used as a diluent of a paint system, no organic solvent is used, VOC emission is reduced, and the prepared paint has good ductility, is easy to coat on the surface of a substrate layer, is stable in bonding with the substrate layer, is not easy to separate from the substrate layer, and has high stability.
Preferably, the abrasive is one of alumina, silicon carbide and diamond, and the abrasive has high strength and good dispersibility, is easy to disperse in the coating, is easy to form a dense-sparse texture structure, and can uniformly polish workpieces.
Preferably, the abrasive is a modified abrasive subjected to modification treatment, and the modified abrasive is prepared by the following steps:
the method comprises the following steps: mixing polyoxyethylene alkyl aryl ether with deionized water, uniformly dispersing, and adding sodium carboxymethylcellulose to prepare a pre-dispersion liquid; the method has the advantages that the polyoxyethylene alkyl aryl ether is dissolved and dispersed by using deionized water, and then the dispersibility of the system is improved by using polyethylene glycol, so that the system is uniformly dispersed after the grinding material and calcium carbonate are subsequently added, the suspension property is good, agglomeration is not easy to generate, a sufficient contact area is further provided for grafting an active group of the polyoxyethylene alkyl aryl ether on the surface of the grinding material, the contact area of the polyoxyethylene alkyl aryl ether and the grinding material is not reduced due to material agglomeration, and the grafting rate is improved;
step two: adding an abrasive into the pre-dispersion liquid prepared in the step I, stirring for 10-20min at room temperature, then heating to 70-75 ℃, stirring for 20-30min under the irradiation of ultraviolet rays with the wavelength of 332-350nm, then adding calcium carbonate, stirring uniformly to prepare a mixture, and preserving heat for 50-70 min; after the powder material of the abrasive and the calcium carbonate is added, stirring at room temperature to improve the dispersibility of the material, then improving the temperature, promoting the active group of the polyoxyethylene alkyl aryl ether to be grafted on the surface of abrasive particles under the action of ultraviolet irradiation, and finally performing heat preservation treatment to ensure the sufficiency of grafting reaction, simultaneously promoting the calcium carbonate to be adsorbed on the surface of the abrasive subjected to grafting modification treatment to form a physical adsorption layer, and improving the dispersibility of the abrasive in a coating system to ensure the grinding uniformity of the abrasive in the water-based coating on a workpiece;
step three: and (4) dropwise adding sodium sulfite into the mixture at the temperature of 70-75 ℃ in the step (II), stirring while dropwise adding, continuously stirring for 15-20min after dropwise adding is finished, then cooling the reaction system to 35-50 ℃, and filtering, washing and drying to obtain the modified abrasive.
In the step I, the mixing weight ratio of polyoxyethylene alkyl aryl ether, deionized water and sodium carboxymethyl cellulose is (15-20: 35): 3-5; by strictly controlling the mixing proportion of polyoxyethylene alkyl aryl ether, deionized water and sodium carboxymethylcellulose, the dispersibility of the system can be improved, and the system can be uniformly dispersed with subsequent abrasives and calcium carbonate, is stable in suspension and is easy to graft.
Preferably, in the second step, the mixing weight ratio of the grinding material, the calcium carbonate and the pre-dispersion liquid is 15-20:2-6: 50;
preferably, in the third step, the addition amount of the sodium sulfite is 2-8 wt% of the mixture.
The modified abrasive is modified by polyoxyethylene alkyl aryl ether, and the water-soluble polymer block of the polyoxyethylene alkyl aryl ether is grafted on the surface of abrasive particles, so that the hydrophilicity of the abrasive is improved, the dispersibility of the abrasive in a water-based coating is improved on one hand, the grinding uniformity of the abrasive in the water-based coating on a workpiece is ensured, the phenomena of uneven grinding, local abrasion and scratch of the workpiece and the like caused by uneven dispersion of the abrasive are avoided, and the hydrophilicity of the abrasive in a coating is improved on the other hand, so that water can be uniformly soaked in the coating on the surface of abrasive paper during wet grinding, and the wet grinding effect is good; wherein, the sodium carboxymethyl cellulose is used for improving the dispersibility of the pre-dispersion liquid and improving the dispersibility of the grinding material. Calcium carbonate is added after the grafting modification, and the calcium carbonate is adsorbed on the surface of the abrasive material after the grafting modification treatment to form a physical adsorption layer, so that the agglomeration of abrasive material powder is prevented, and the dispersibility of the abrasive material is improved; and finally, sodium sulfite is added for sulfonation reaction, so that the dispersibility and compatibility of the abrasive and other materials are improved, and the water-based paint is further easily coated on the surface of the base material layer.
Preferably, the aqueous adhesive is at least one of phenolic resin, aqueous epoxy resin, urea resin, aqueous acrylic resin and aqueous polyurethane resin. The water-based resin is used as the adhesive, can be uniformly dispersed with water, reduces the VOC content in the coating, is compounded with the water, ensures that the prepared coating has the viscosity of 750-1000CP (25 ℃), has the solid content of 20-70 percent, is easy to coat by a micro-concave roller to form a surface with sparse and dense grains, and has high stability. More preferably, the aqueous adhesive is a mixture of aqueous epoxy resin, aqueous acrylic resin and aqueous polyurethane resin in a weight ratio of 2:3-4: 1.5-2.
Preferably, the crosslinking agent is at least one of aziridine crosslinking agent, isocyanate crosslinking agent and amide vinyl crosslinking agent; the flatting agent is at least one of polydimethylsiloxane, silicone oil, fluorine modified acrylate and polyurethane flatting agent; the thickening agent is at least one of sodium carboxymethylcellulose, fumed silica, bentonite, polyvinyl alcohol, sodium polyacrylate and polyethylene glycol.
The cross-linking agent adopted by the invention can improve the cross-linking bonding property between the water-based adhesive and the grinding material, improve the compatibility among materials and promote the formation of a stable coating system; more preferably, the cross-linking agent is a mixture of aziridine cross-linking agent, isocyanate cross-linking agent and amide ethylene cross-linking agent in a weight ratio of 1:2.5-3: 2.
By adopting the leveling agent, the surface tension between the abrasive and the base material can be reduced, so that the abrasive and the base material have better wettability, the leveling property and the ductility of the water-based paint are improved, and the water-based paint is easy to coat on the surface of the base material layer through the micro-concave roller; more preferably, the leveling agent is a mixture of polydimethylsiloxane, silicone oil and fluorine modified acrylate in a weight ratio of 1-1.5:2-3: 1.
By adopting the thickening agent, the viscosity of the coating system can be increased, the viscosity of the coating system is regulated to be 750-1000CP (25 ℃), the binding property among materials in the coating is further increased, and the coating is easily coated on the surface of the substrate layer through the micro-concave roller; more preferably, the thickening agent is a mixture of sodium carboxymethylcellulose, polyvinyl alcohol, sodium polyacrylate and polyethylene glycol in a weight ratio of 1.2-1.8:2:2-3: 1.
Preferably, the wetting agent is at least one of phosphate, polyoxyethylene fatty alcohol ether, polyoxyethylene alkylphenol ether and fatty acid ester sulfate; the defoaming agent is at least one of emulsified silicone oil, a high-alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether and polydimethylsiloxane.
The wetting agent adopted by the invention can improve the wettability of the coating, so that the coating is easy to adjust the viscosity of the coating by taking water as a diluent, and the coating is easy to coat on the surface of a substrate layer through a micro-concave roller to form a coating with spaced sparse and dense grains; more preferably, the wetting agent is a mixture of polyoxyethylene fatty alcohol ether and polyoxyethylene alkylphenol ether in a weight ratio of 1: 2-3.
By adopting the defoaming agent, bubbles generated in the stirring and emulsifying process of the coating can be eliminated, and the bubbles generated in the stirring and preparing process and the micro-concave roller coating process can be inhibited, so that the dispersion of the coating and the surface smoothness of the coating are prevented from being influenced by the bubbles, and the polishing effect of the polishing film is prevented from being influenced; more preferably, the defoaming agent is a mixture of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether and polyoxypropylene glycerol ether in a weight ratio of 2.5-3.5:1: 1.5-2.
Preferably, the water-based paint is prepared by the following steps:
A. mixing the grinding material, the water-based adhesive and water in parts by weight, stirring, and heating to 55-65 ℃ to obtain a mixture;
B. and D, emulsifying and dispersing the mixture prepared in the step A for 25-35min under the condition that the rotating speed is 1500-.
The other purpose of the invention is realized by the following technical scheme: a method for preparing a precision polishing film having a specific structure as described above, comprising the steps of:
(1) adding the water-based paint into a trough of micro-concave roller coating equipment, and controlling the temperature of the micro-concave roller and the temperature of the trough to be 26-30 ℃;
(2) and coating the water-based paint in the trough on the surface of the substrate layer by a micro-concave roller, and drying to obtain the precision polishing film with a special structure.
Preferably, in the step (1), the diameter of the micro-concave roller is 50-120mm, the ratio of the concave grain area of the micro-concave roller is 50-80%, and the concave grain of the micro-concave roller is spiral grain, grid grain, wavy grain, point concave grain or turtleback grain.
Preferably, in the step (2), the rotating speed of the micro-concave roller is 40-360rpm in the coating process, and the coating amount is less than or equal to 150g/cm2The coating equipment has a machine speed of 10-30m/min, the drying is respectively carried out through four drying zones, the temperature of the first drying zone is 75-85 ℃, the temperature of the second drying zone is 110-.
The micro-concave roller type coating adopted in the process for preparing the precise polishing film is a novel coating mode, has a simpler structure and high precision, is different from the prior mode of controlling the coating amount by depending on the width of a slit, controls the coating amount by depending on the distribution density, the width and the depth of the concave grains of the micro-concave roller, and has convenient operation and uniform coating. Wherein, through the diameter of the little concave roller of strict control, the concave line area ratio of little concave roller, the rotational speed of little concave roller, coating amount and stoving temperature, can coat out density line alternating coating on the surface of substrate layer, and the cohesion of coating and substrate layer is strong, and difficult separation has prolonged polishing film's life between the layer.
The invention has the beneficial effects that: the precision polishing film is novel in structure, the dense grain area enhances the polishing performance of a workpiece through the dense grain area and the sparse grain area, the polished workpiece scraps are led out through the sparse grain area, the polishing efficiency and the polishing effect are prevented from being influenced due to the fact that the polished workpiece scraps are blocked on the polishing film, the polishing efficiency of the polishing film can be effectively improved, and the polishing effect is set at intervals, so that the phenomena of scratching, dents and the like of the polished workpiece are avoided.
The preparation method of the precision polishing film is simple to operate, easy to control, high in production efficiency and low in production cost, can stabilize the quality of the prepared precision polishing film, can uniformly polish workpieces, and can be used for large-scale production.
Drawings
FIG. 1 is a partial cross-sectional view of the present invention;
FIG. 2 is a plan view of a coating according to the present invention;
the reference signs are: 1-substrate layer, 2-coating, 21-microgroove area, 22-microgroove area.
Detailed Description
For the understanding of those skilled in the art, the present invention will be further described with reference to the following examples and accompanying drawings 1-2, and the content of the embodiments is not intended to limit the present invention.
Example 1
A precision polishing film with a special structure comprises a substrate layer 1 and a coating arranged on the surface of the substrate layer 1, abrasive materials are distributed in the coating, the coating comprises a microgroove area 21 and a microgroove area 22 which are arranged at intervals, the abrasive material distribution density of the microgroove area 21 is larger than that of the microgroove area 22, and the interval distance between the adjacent microgroove area 21 and the adjacent microgroove area 22 is 20 micrometers. Furthermore, the surface of the coating layer, which is far away from the substrate layer 1, is wavy, the dense-grain region 21 is located at the wave crest, and the sparse-grain region 22 is located at the wave crest.
The ratio of the abrasive distribution density of the microgroove area 21 to the abrasive distribution density of the microgroove area 22 is 10-50: 1; the dense-grain region 21 and the sparse-grain region 22 are both stripe-shaped.
The thickness of the substrate layer 1 is 50-200 μm; the thickness a of the highest part of the dense grain area 21 of the coating is 1.5-3 times of the grain diameter of the abrasive; the thickness b of the dimpled zone 22 of the coating is 1-1.5 times the abrasive grain size.
The coating is prepared from a water-based paint, and the water-based paint comprises the following raw materials in parts by weight:
Figure BDA0002315362250000081
the abrasive is alumina.
The abrasive is a modified abrasive subjected to modification treatment, and the modified abrasive is prepared by the following steps:
the method comprises the following steps: mixing polyoxyethylene alkyl aryl ether with deionized water, uniformly dispersing, and adding sodium carboxymethylcellulose to prepare a pre-dispersion liquid;
step two: adding an abrasive into the pre-dispersion liquid prepared in the step I, stirring for 10min at room temperature, then heating to 70 ℃, stirring for 20min under the irradiation of ultraviolet rays with the wavelength of 332nm, adding calcium carbonate, stirring uniformly to prepare a mixture, and keeping the temperature for 50 min;
step three: and (4) dropwise adding sodium sulfite into the mixture at the temperature of 70 ℃ in the step (II), stirring while dropwise adding, continuously stirring for 15min after dropwise adding is finished, then cooling the reaction system to 35 ℃, and filtering, washing and drying to obtain the modified abrasive.
In the step (I), the mixing weight ratio of polyoxyethylene alkyl aryl ether, deionized water and sodium carboxymethyl cellulose is (15: 35): 5;
in the second step, the mixing weight ratio of the grinding material, the calcium carbonate and the pre-dispersion liquid is 15:6: 50;
in the third step, the addition amount of the sodium sulfite is 2 wt% of the mixture.
The aqueous adhesive is phenolic resin.
The cross-linking agent is an aziridine cross-linking agent, specifically an aziridine cross-linking agent XR-100; the flatting agent is polydimethylsiloxane; the thickening agent is sodium carboxymethyl cellulose.
The wetting agent is phosphate ester; the defoaming agent is emulsified silicone oil.
The water-based paint is prepared by the following steps:
A. mixing the grinding material, the water-based adhesive and water in parts by weight, stirring, and heating to 55 ℃ to obtain a mixture;
B. and C, emulsifying and dispersing the mixture prepared in the step A for 35min under the condition that the rotating speed is 1500rpm, adding the rest materials, and continuously dispersing for 10min to prepare the water-based paint.
A method for preparing a precision polishing film having a specific structure as described above, comprising the steps of:
(1) adding the water-based paint into a trough of micro-concave roller coating equipment, and controlling the temperature of the micro-concave roller and the temperature of the trough to be 26 ℃;
(2) taking a substrate layer 1, coating the water-based paint in the trough on the surface of the substrate layer 1 through a micro-concave roller, and drying to obtain the precision polishing film with a special structure.
In the step (1), the diameter of the micro-concave roller is 50mm, the concave grain area of the micro-concave roller accounts for 50%, and the concave grain of the micro-concave roller is spiral grain, grid grain, wavy grain, point concave grain or turtleback grain.
In the step (2), in the coating process, the rotating speed of the micro-concave roller is 40rpm, and the coating amount is less than or equal to 150g/cm2The coating equipment has a machine speed of 10m/min, the drying is respectively carried out through four drying zones, the temperature of the first drying zone is 75 ℃, the temperature of the second drying zone is 100 ℃, and the third drying zoneThe temperature of the zone is 125 ℃, the temperature of the fourth drying zone is 105 ℃, and the drying time of each drying zone is 35 min.
Example 2
This embodiment differs from embodiment 1 described above in that:
the coating is prepared from a water-based paint, and the water-based paint comprises the following raw materials in parts by weight:
Figure BDA0002315362250000101
the abrasive is silicon carbide.
The abrasive is a modified abrasive subjected to modification treatment, and the modified abrasive is prepared by the following steps:
the method comprises the following steps: mixing polyoxyethylene alkyl aryl ether with deionized water, uniformly dispersing, and adding sodium carboxymethylcellulose to prepare a pre-dispersion liquid;
step two: adding the grinding material into the pre-dispersion liquid prepared in the step I, stirring for 12min at room temperature, then heating to 71 ℃, stirring for 22min under the irradiation of ultraviolet rays with the wavelength of 336nm, adding calcium carbonate, stirring uniformly to prepare a mixture, and keeping the temperature for 55 min;
step three: and (4) dropwise adding sodium sulfite into the mixture at the temperature of 71 ℃ in the step (II), stirring while dropwise adding, continuously stirring for 16min after dropwise adding is finished, then cooling the reaction system to 38 ℃, and filtering, washing and drying to obtain the modified abrasive.
In the step (I), the mixing weight ratio of polyoxyethylene alkyl aryl ether, deionized water and sodium carboxymethyl cellulose is 16: 35: 4.5;
in the second step, the mixing weight ratio of the grinding material, the calcium carbonate and the pre-dispersion liquid is 16:5: 50;
in the third step, the addition amount of the sodium sulfite is 3 wt% of the mixture.
The water-based adhesive is water-based epoxy resin.
The cross-linking agent is isocyanate cross-linking agent; the leveling agent is silicone oil; the thickening agent is bentonite.
The wetting agent is polyoxyethylene fatty alcohol ether; the defoaming agent is polyoxyethylene polyoxypropylene pentaerythritol ether.
The water-based paint is prepared by the following steps:
A. mixing the grinding material, the water-based adhesive and water in parts by weight, stirring, and heating to 58 ℃ to obtain a mixture;
B. and D, emulsifying and dispersing the mixture prepared in the step A for 32min under the condition that the rotating speed is 2000rpm, adding the rest materials, and continuously dispersing for 12min to prepare the water-based paint.
A method for preparing a precision polishing film having a specific structure as described above, comprising the steps of:
(1) adding the water-based paint into a trough of micro-concave roller coating equipment, and controlling the temperature of the micro-concave roller and the temperature of the trough to be 27 ℃;
(2) taking a substrate layer 1, coating the water-based paint in the trough on the surface of the substrate layer 1 through a micro-concave roller, and drying to obtain the precision polishing film with a special structure.
In the step (1), the diameter of the micro-concave roller is 75mm, the concave grain area of the micro-concave roller accounts for 60%, and the concave grain of the micro-concave roller is spiral grain, grid grain, wavy grain, point concave grain or turtleback grain.
In the step (2), in the coating process, the rotating speed of the micro-concave roller is 120rpm, and the coating amount is less than or equal to 150g/cm2The machine speed of the coating equipment is 15m/min, the drying respectively passes through four drying zones, the temperature of the first drying zone is 78 ℃, the temperature of the second drying zone is 102 ℃, the temperature of the third drying zone is 128 ℃, the temperature of the fourth drying zone is 105-115 ℃, and the drying time of each drying zone is 30 min.
Example 3
This embodiment differs from embodiment 1 described above in that:
the coating is prepared from a water-based paint, and the water-based paint comprises the following raw materials in parts by weight:
Figure BDA0002315362250000121
the abrasive is diamond.
The abrasive is a modified abrasive subjected to modification treatment, and the modified abrasive is prepared by the following steps:
the method comprises the following steps: mixing polyoxyethylene alkyl aryl ether with deionized water, uniformly dispersing, and adding sodium carboxymethylcellulose to prepare a pre-dispersion liquid;
step two: adding an abrasive into the pre-dispersion liquid prepared in the first step, stirring for 15min at room temperature, then heating to 75 ℃, stirring for 25min under the irradiation of ultraviolet rays with the wavelength of 340nm, adding calcium carbonate, stirring uniformly to prepare a mixture, and keeping the temperature for 60 min;
step three: and (4) dropwise adding sodium sulfite into the mixture at the temperature of 72 ℃ in the step (II), stirring while dropwise adding, continuously stirring for 17min after dropwise adding is finished, then cooling the reaction system to 42 ℃, and filtering, washing and drying to obtain the modified abrasive.
In the step (I), the mixing weight ratio of polyoxyethylene alkyl aryl ether, deionized water and sodium carboxymethyl cellulose is 17: 35: 4;
in the second step, the mixing weight ratio of the grinding material, the calcium carbonate and the pre-dispersion liquid is 18:4: 50;
in the third step, the addition amount of the sodium sulfite is 5 wt% of the mixture.
The aqueous adhesive is urea-formaldehyde resin.
The cross-linking agent is an amide ethylene cross-linking agent, and specifically is N-hydroxymethyl acrylamide; the leveling agent is fluorine modified acrylate; the thickening agent is fumed silica.
The wetting agent is polyoxyethylene alkylphenol ether; the defoaming agent is polyoxyethylene polyoxypropylene ether.
The water-based paint is prepared by the following steps:
A. mixing the grinding material, the water-based adhesive and water in parts by weight, stirring, and heating to 60 ℃ to obtain a mixture;
B. and D, emulsifying and dispersing the mixture prepared in the step A for 30min under the condition that the rotating speed is 2500rpm, then adding the rest materials, and continuously dispersing for 15min to prepare the water-based paint.
A method for preparing a precision polishing film having a specific structure as described above, comprising the steps of:
(1) adding the water-based paint into a trough of micro-concave roller coating equipment, and controlling the temperature of the micro-concave roller and the temperature of the trough to be 28 ℃;
(2) taking a substrate layer 1, coating the water-based paint in the trough on the surface of the substrate layer 1 through a micro-concave roller, and drying to obtain the precision polishing film with a special structure.
In the step (1), the diameter of the micro-concave roller is 90mm, the concave grain area of the micro-concave roller accounts for 65%, and the concave grain of the micro-concave roller is spiral grain, grid grain, wavy grain, point concave grain or turtleback grain.
In the step (2), in the coating process, the rotating speed of the micro-concave roller is 200rpm, and the coating amount is less than or equal to 150g/cm2The machine speed of the coating equipment is 20m/min, the drying respectively passes through four drying zones, the temperature of the first drying zone is 80 ℃, the temperature of the second drying zone is 105 ℃, the temperature of the third drying zone is 130 ℃, the temperature of the fourth drying zone is 105-115 ℃, and the drying time of each drying zone is 28 min.
Example 4
This embodiment differs from embodiment 1 described above in that:
the coating is prepared from a water-based paint, and the water-based paint comprises the following raw materials in parts by weight:
Figure BDA0002315362250000141
the abrasive is silicon carbide.
The abrasive is a modified abrasive subjected to modification treatment, and the modified abrasive is prepared by the following steps:
the method comprises the following steps: mixing polyoxyethylene alkyl aryl ether with deionized water, uniformly dispersing, and adding sodium carboxymethylcellulose to prepare a pre-dispersion liquid;
step two: adding an abrasive into the pre-dispersion liquid prepared in the first step, stirring at room temperature for 18min, heating to 73 ℃, stirring for 28min under the irradiation of ultraviolet rays with the wavelength of 345nm, adding calcium carbonate, stirring uniformly to prepare a mixture, and keeping the temperature for 65 min;
step three: and (4) dropwise adding sodium sulfite into the mixture at the temperature of 73 ℃ in the step (II), stirring while dropwise adding, continuously stirring for 18min after dropwise adding is finished, then cooling the reaction system to 46 ℃, and filtering, washing and drying to obtain the modified abrasive.
In the step (I), the mixing weight ratio of polyoxyethylene alkyl aryl ether, deionized water and sodium carboxymethyl cellulose is 18: 35: 3.5;
in the second step, the mixing weight ratio of the grinding material, the calcium carbonate and the pre-dispersion liquid is 19:23: 50;
in the third step, the addition amount of the sodium sulfite is 6 wt% of the mixture.
The water-based adhesive is water-based acrylic resin.
The cross-linking agent is an isocyanate cross-linking agent, in particular to an XC-205 aziridine modified isocyanate cross-linking agent; the flatting agent is a polyurethane flatting agent; the thickening agent is sodium polyacrylate.
The wetting agent is fatty acid ester sulfate; the defoaming agent is polyoxypropylene polyoxyethylene glycerol ether.
The water-based paint is prepared by the following steps:
A. mixing the grinding material, the water-based adhesive and water in parts by weight, stirring, and heating to 63 ℃ to obtain a mixture;
B. and C, emulsifying and dispersing the mixture prepared in the step A for 28min under the condition that the rotating speed is 3000rpm, then adding the rest materials, and continuously dispersing for 18min to prepare the water-based paint.
A method for preparing a precision polishing film having a specific structure as described above, comprising the steps of:
(1) adding the water-based paint into a trough of micro-concave roller coating equipment, and controlling the temperature of the micro-concave roller and the temperature of the trough to be 29 ℃;
(2) taking a substrate layer 1, coating the water-based paint in the trough on the surface of the substrate layer 1 through a micro-concave roller, and drying to obtain the precision polishing film with a special structure.
In the step (1), the diameter of the micro-concave roller is 110mm, the concave grain area of the micro-concave roller accounts for 70%, and the concave grain of the micro-concave roller is spiral grain, grid grain, wavy grain, point concave grain or turtleback grain.
In the step (2), in the coating process, the rotating speed of the micro-concave roller is 280rpm, and the coating amount is less than or equal to 150g/cm2The machine speed of the coating equipment is 25m/min, the drying respectively passes through four drying zones, the temperature of the first drying zone is 83 ℃, the temperature of the second drying zone is 108 ℃, the temperature of the third drying zone is 132 ℃, the temperature of the fourth drying zone is 105-115 ℃, and the drying time of each drying zone is 23 min.
Example 5
This embodiment differs from embodiment 1 described above in that:
the coating is prepared from a water-based paint, and the water-based paint comprises the following raw materials in parts by weight:
Figure BDA0002315362250000161
the abrasive is alumina.
The abrasive is a modified abrasive subjected to modification treatment, and the modified abrasive is prepared by the following steps:
the method comprises the following steps: mixing polyoxyethylene alkyl aryl ether with deionized water, uniformly dispersing, and adding sodium carboxymethylcellulose to prepare a pre-dispersion liquid;
step two: adding an abrasive into the pre-dispersion liquid prepared in the first step, stirring for 20min at room temperature, then heating to 75 ℃, stirring for 30min under the irradiation of ultraviolet rays with the wavelength of 350nm, adding calcium carbonate, stirring uniformly to prepare a mixture, and keeping the temperature for 70 min;
step three: and (4) dropwise adding sodium sulfite into the mixture at the temperature of 75 ℃ in the step (II), stirring while dropwise adding, continuously stirring for 20min after dropwise adding is finished, then cooling the reaction system to 50 ℃, and filtering, washing and drying to obtain the modified abrasive.
In the step (I), the mixing weight ratio of polyoxyethylene alkyl aryl ether, deionized water and sodium carboxymethyl cellulose is 20: 35: 3;
in the second step, the mixing weight ratio of the abrasive, the calcium carbonate and the pre-dispersion liquid is 20:2: 50;
in the third step, the addition amount of the sodium sulfite is 8 wt% of the mixture.
The aqueous adhesive is aqueous polyurethane resin.
The cross-linking agent is an aziridine cross-linking agent; the leveling agent is silicone oil; the thickening agent is polyvinyl alcohol.
The wetting agent is polyoxyethylene fatty alcohol ether; the defoaming agent is polydimethylsiloxane.
The water-based paint is prepared by the following steps:
A. mixing the grinding material, the water-based adhesive and water in parts by weight, stirring, and heating to 65 ℃ to obtain a mixture;
B. and D, emulsifying and dispersing the mixture prepared in the step A for 25min under the condition that the rotating speed is 4000rpm, adding the rest materials, and continuously dispersing for 20min to prepare the water-based paint.
A method for preparing a precision polishing film having a specific structure as described above, comprising the steps of:
(1) adding the water-based paint into a trough of micro-concave roller coating equipment, and controlling the temperature of the micro-concave roller and the temperature of the trough to be 30 ℃;
(2) taking a substrate layer 1, coating the water-based paint in the trough on the surface of the substrate layer 1 through a micro-concave roller, and drying to obtain the precision polishing film with a special structure.
In the step (1), the diameter of the micro-concave roller is 120mm, the concave grain area of the micro-concave roller accounts for 80%, and the concave grain of the micro-concave roller is spiral grain, grid grain, wavy grain, point concave grain or turtleback grain.
In the step (2), in the coating process, the rotating speed of the micro-concave roller is 360rpm, and the coating amount is less than or equal to 150g/cm2The coating equipment has a machine speed of 30m/min, and the drying process comprises four drying zones, wherein the first drying zone has a temperature of 85 deg.C, and the second drying zone has a temperature of 110 deg.CThe third drying zone was 135 deg.C, the fourth drying zone was 115 deg.C, and the drying time in each drying zone was 20 min.
Example 6
This embodiment differs from embodiment 1 described above in that:
the aqueous adhesive is a mixture of aqueous epoxy resin, aqueous acrylic resin and aqueous polyurethane resin in a weight ratio of 2:3: 1.5.
The cross-linking agent is a mixture consisting of an aziridine cross-linking agent XR-100, an XC-205 type aziridine modified isocyanate cross-linking agent and N-methylol acrylamide in a weight ratio of 1:2.5: 2.
The leveling agent is a mixture of polydimethylsiloxane, silicone oil and fluorine modified acrylate in a weight ratio of 1:3: 1.
The thickening agent is a mixture of sodium carboxymethylcellulose, polyvinyl alcohol, sodium polyacrylate and polyethylene glycol in a weight ratio of 1.2:2:3: 1.
The defoaming agent is a mixture of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether and polyoxypropylene glycerol ether in a weight ratio of 2.5:1: 2.
Example 7
This embodiment differs from embodiment 3 described above in that:
the aqueous adhesive is a mixture of aqueous epoxy resin, aqueous acrylic resin and aqueous polyurethane resin in a weight ratio of 2:3.5: 1.8.
The cross-linking agent is a mixture consisting of an aziridine cross-linking agent XR-100, an XC-205 type aziridine modified isocyanate cross-linking agent and N-methylol acrylamide in a weight ratio of 1:2.8: 2.
The leveling agent is a mixture of polydimethylsiloxane, silicone oil and fluorine modified acrylate in a weight ratio of 1.3:2.5: 1.
The thickening agent is a mixture of sodium carboxymethylcellulose, polyvinyl alcohol, sodium polyacrylate and polyethylene glycol in a weight ratio of 1.5:2:2.5: 1.
The defoaming agent is a mixture of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether and polyoxypropylene glycerol ether in a weight ratio of 3:1: 1.8.
Example 8
This embodiment differs from embodiment 5 described above in that:
the aqueous adhesive is a mixture of aqueous epoxy resin, aqueous acrylic resin and aqueous polyurethane resin in a weight ratio of 2:4: 2.
The cross-linking agent is a mixture consisting of an aziridine cross-linking agent XR-100, an XC-205 type aziridine modified isocyanate cross-linking agent and N-methylol acrylamide in a weight ratio of 1:3: 2.
The leveling agent is a mixture of polydimethylsiloxane, silicone oil and fluorine modified acrylate in a weight ratio of 1.5:2: 1.
The thickening agent is a mixture of sodium carboxymethylcellulose, polyvinyl alcohol, sodium polyacrylate and polyethylene glycol in a weight ratio of 1.8:2:2: 1.
The defoaming agent is a mixture of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether and polyoxypropylene glycerol ether in a weight ratio of 3.5:1: 1.5.
Comparative example 1
This comparative example differs from example 3 above in that:
the coating is prepared from a water-based paint, and the water-based paint comprises the following raw materials in parts by weight:
Figure BDA0002315362250000191
the dispersing agent is allyl alcohol polyoxyethylene ether.
The abrasive is an abrasive which is not subjected to modification treatment,
Comparative example 2
This comparative example differs from example 3 above in that:
the abrasive is a modified abrasive subjected to modification treatment, and the modified abrasive is prepared by the following steps:
the method comprises the following steps: mixing allyl alcohol polyoxyethylene ether with deionized water, uniformly dispersing, and adding sodium carboxymethylcellulose to prepare a pre-dispersion solution;
step two: adding an abrasive into the pre-dispersion liquid prepared in the first step, stirring for 15min at room temperature, then heating to 75 ℃, stirring for 25min under the irradiation of ultraviolet rays with the wavelength of 340nm, adding calcium carbonate, stirring uniformly to prepare a mixture, and keeping the temperature for 60 min;
step three: and (4) dropwise adding sodium sulfite into the mixture at the temperature of 72 ℃ in the step (II), stirring while dropwise adding, continuously stirring for 17min after dropwise adding is finished, then cooling the reaction system to 42 ℃, and filtering, washing and drying to obtain the modified abrasive.
In the step I, the mixing weight ratio of the allyl alcohol polyoxyethylene ether, the deionized water and the sodium carboxymethyl cellulose is 17: 35: 4;
in the second step, the mixing weight ratio of the grinding material, the calcium carbonate and the pre-dispersion liquid is 18:4: 50;
in the third step, the addition amount of the sodium sulfite is 5 wt% of the mixture.
Comparative example 3
This comparative example differs from example 2 above in that:
the coating is prepared from a coating, and the coating comprises the following raw materials in parts by weight:
Figure BDA0002315362250000201
the water-based adhesive is epoxy resin.
The precision polishing films obtained in examples 1 to 8 and comparative examples 1 to 3 were subjected to the viscosity and VOC content tests, and the specific test results were as follows:
Figure BDA0002315362250000202
Figure BDA0002315362250000211
the precision polishing films obtained in examples 1 to 8 and comparative examples 1 to 2 were subjected to a polishing effect test in which a painted automobile panel was polished for 30 seconds each at a polishing pressure of 8 to 15N/cm2And recording the polishing and powder cutting weight of the automobile paint plate after polishing each time, wherein the polishing and powder cutting weight of the automobile paint plate after polishing each time is similar or even consistent, and then the polishing effect of the polishing film on the workpiece is uniform. The specific test results are as follows:
Figure BDA0002315362250000212
Figure BDA0002315362250000221
according to the data, the abrasive is subjected to surface modification, the hydrophilicity of the surface of the abrasive is increased, the associativity of the abrasive with water and a water-based adhesive is increased, the dispersibility of the abrasive in a coating system is promoted, the polishing effect is improved, the uneven polishing is avoided, the difference of the weight of the ground powder polished each time is large, and the VOC content in the coating system can be reduced by adopting the specific water-based adhesive.
Comparative example 1 compared with example 3, 3 parts of dispersing agent is used to replace 3 parts of equivalent grinding material, and the grinding material is unmodified grinding material, namely the dispersing agent is directly used to promote the dispersibility of the grinding material, so that the grinding weight of the automobile paint plate is between 1.5 and 2.3g, and the variation interval is 0.8, which indicates that the grinding material is not subjected to surface modification, and even if the dispersing agent is used to disperse the grinding material, the dispersibility of the grinding material is still low, the grinding material is unevenly ground on a workpiece, and the grinding material is easy to accumulate and reduce the grinding effect and the wear resistance of the polishing film.
Comparative example 2 in comparison with example 3, the same amount of allyl alcohol polyoxyethylene ether was used instead of polyoxyethylene alkyl aryl ether, so that the weight of the automobile paint plate buffed powder was 1.5-2.1g, and the variation range was 0.6; in the aqueous system, the dispersibility of the abrasive modified by the modifier is reduced, so that the prepared polishing film can polish workpieces unevenly, and the polishing effect is reduced.
The coating of comparative example 3 did not use an aqueous adhesive, resulting in a higher VOC content, even a nearly tenfold difference from the VOC content of example 2.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.

Claims (9)

1. A precision polishing film with a special structure is characterized in that: the abrasive material coating comprises a base material layer and a coating layer arranged on the surface of the base material layer, abrasive materials are distributed in the coating layer, the coating layer comprises a microgroove area and a sparse groove area which are arranged at intervals, the abrasive material distribution density of the microgroove area is greater than that of the sparse groove area, and the interval distance between the adjacent microgroove area and the sparse groove area is 20-200 mu m;
the thickness of the substrate layer is 50-200 μm; the thickness a of the highest part of the dense grain area of the coating is 1.5-3 times of the grain size of the abrasive; the thickness b of the lowest part of the sparse-grain area of the coating is 1-1.5 times of the grain diameter of the abrasive;
the coating is prepared from a water-based paint, and the water-based paint comprises the following raw materials in parts by weight:
40-70 parts of abrasive
15-50 parts of water-based adhesive
2-10 parts of cross-linking agent
0.5-3 parts of flatting agent
0.2 to 2 portions of thickening agent
0.2 to 1 portion of wetting agent
0.1 to 1 portion of defoaming agent
5-20 parts of water.
2. The precision polishing film according to claim 1, wherein: the ratio of the abrasive distribution density of the microgroove area to the abrasive distribution density of the sparse grain area is 10-50: 1; the dense-line area and the sparse-line area are both in a stripe shape.
3. The precision polishing film according to claim 1, wherein: the abrasive is one of aluminum oxide, silicon carbide and diamond, and the aqueous adhesive is at least one of phenolic resin, aqueous epoxy resin, urea-formaldehyde resin, aqueous acrylic resin and aqueous polyurethane resin.
4. The precision polishing film according to claim 1, wherein: the cross-linking agent is at least one of aziridine cross-linking agent, isocyanate cross-linking agent and amide vinyl cross-linking agent; the flatting agent is at least one of polydimethylsiloxane, silicone oil, fluorine modified acrylate and polyurethane flatting agent; the thickening agent is at least one of sodium carboxymethylcellulose, fumed silica, bentonite, polyvinyl alcohol, sodium polyacrylate and polyethylene glycol.
5. The precision polishing film according to claim 1, wherein: the wetting agent is at least one of phosphate, polyoxyethylene fatty alcohol ether, polyoxyethylene alkylphenol ether and fatty acid ester sulfate; the defoaming agent is at least one of emulsified silicone oil, a high-alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene amine ether, polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether and polydimethylsiloxane.
6. The precision polishing film according to claim 1, wherein: the water-based paint is prepared by the following steps:
A. mixing the grinding material, the water-based adhesive and water in parts by weight, stirring, and heating to 55-65 ℃ to obtain a mixture;
B. and D, emulsifying and dispersing the mixture prepared in the step A for 25-35min under the condition that the rotating speed is 1500-.
7. A method for producing a precision polishing film having a specific structure according to any one of claims 3 to 6, characterized by: the method comprises the following steps:
(1) adding the water-based paint into a trough of micro-concave roller coating equipment, and controlling the temperature of the micro-concave roller and the temperature of the trough to be 26-30 ℃;
(2) and coating the water-based paint in the trough on the surface of the substrate layer by a micro-concave roller, and drying to obtain the precision polishing film with a special structure.
8. The method for producing a precision polishing film having a specific structure according to claim 7, wherein: in the step (1), the diameter of the micro-concave roller is 50-120mm, the ratio of the concave grain area of the micro-concave roller is 50-80%, and the concave grain of the micro-concave roller is spiral grain, grid grain, wavy grain, point concave grain or turtleback grain.
9. The method for producing a precision polishing film having a specific structure according to claim 7, wherein: in the step (2), in the coating process, the rotating speed of the micro-concave roller is 40-360rpm, and the coating amount is less than or equal to 150g/cm2The coating equipment has a machine speed of 10-30m/min, the drying is respectively carried out through four drying zones, the temperature of the first drying zone is 75-85 ℃, the temperature of the second drying zone is 110-.
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