Preparation method of grinding tool special for stainless steel wire drawing with high surface processing quality

Abstract

The invention relates to a base material treatment method. The base material treatment method comprises the working procedures of dipping, front face polishing, calendaring, front face slurry scraping and compounding with a hard rubber matrix. A dipping material for dipping is prepared from the following components in percentage by weight: 10 to 35 percent of water-soluble phenolic resin, 20 to 30 percent of acrylic emulsion, 5 to 15 percent of polyvinyl alcohol, 5 to 15 percent of styrene-butadiene latex, 15 to 25 percent of filler, 0.5 to 1 percent of penetrating agent, 1 to 3 percent of reinforcing agent and 1 to 5 percent of dispersing agent; the viscosity is adjusted to be 100 to 600 mpa.s by using a solvent. The comprehensive performance of the product reaches the domestic leading level through the work of new cloth base treatment design, abrasive particle size composition adjustment, binder formula adjustment, production process adjustment and the like, the product reaches the high surface machining quality, and the problems that scratches on the machined surface are too deep and the like are effectively reduced.

Description

Technical Field

[0001] This invention belongs to the field of abrasive preparation technology, specifically relating to a method for preparing a special abrasive for stainless steel wire drawing with high surface finish. Background Technology

[0002] Brushed metal surface treatment is a surface treatment method that involves grinding the surface of raw metal materials to create lines and achieve a decorative effect. It primarily refers to grinding the surfaces of metal alloys such as stainless steel, aluminum alloys, and titanium alloys to achieve the desired decorative textures.

[0003] In recent years, the demand for metal products has increased. Because brushed surfaces can showcase the texture of metal materials, they have gained increasing popularity and wider application. Common brushed materials include 304, 316, and 201 stainless steel, Q235 ordinary steel, and aluminum-magnesium alloys. Different decorative requirements dictate different brushed textures, which can be broadly categorized into straight brush patterns, snowflake patterns, and nylon patterns. Straight brush patterns are continuous lines from top to bottom, typically achieved by moving the workpiece back and forth on a fixed brushing machine. Snowflake patterns are currently the most popular, composed of regularly spaced dots. Nylon patterns consist of lines of varying lengths; due to the softness of nylon wheels, uneven areas can be smoothed to achieve the desired nylon pattern. Different effects result in straight brush patterns and random brush patterns. Straight brush patterns are also called hairline patterns, while random brush patterns are called snowflake patterns. Each user has different requirements for the surface texture, resulting in different panel finishes.

[0004] In the field of metal wire drawing, the market has high requirements for the consistency and stability of surface finish quality. With the development of metal smelting technology and market demands, there are higher requirements for the quality of sheet surface processing. Currently, the preparation of abrasives in the field of metal wire drawing involves traditional cloth-based treatment, applying a base coat, sanding, and applying a top coat. This traditional abrasive preparation method can meet the requirements in the field of coarse grinding, but in the field of fine-grained processing, it results in high processing roughness, poor surface flatness, and poor sheet surface roughness, which affects production efficiency. Based on this, this application was developed. Summary of the Invention

[0005] The purpose of this invention is to overcome the defects of the existing technology and provide a special abrasive for stainless steel wire drawing with high surface finish and its preparation method. By adopting a new cloth base treatment design, adjusting the abrasive particle size composition, adjusting the binder formula, and adjusting the production process, the comprehensive performance of the product reaches the leading level in China, enabling the product to achieve a high surface finish and effectively reducing problems such as excessively deep scratches on the processed surface.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A substrate treatment method, wherein the substrate treatment includes: impregnation, front surface grinding, calendering, front surface slurry application, and a composite process with a hard rubber matrix. The impregnating material, by weight percentage, consists of: water-soluble phenolic resin: 10-35%, acrylic emulsion: 20-30%, polyvinyl alcohol: 5-15%, styrene-butadiene latex: 5-15%, filler: 15-25%, penetrant: 0.5-1%, reinforcing agent: 1-3%, dispersant: 1%-5%, and the viscosity of the impregnating material is adjusted to 100-600 mPa•s with solvent. The filler is light calcium carbonate; the penetrant is sodium fatty alcohol polyoxyethylene ether phosphate; the reinforcing agent is epoxy resin; the dispersant is at least one of nonylphenol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether; and the solvent is water.

[0007] Specifically, by weight percentage, the composition of the front scraper material is as follows: water-soluble phenolic resin: 20~35%, styrene-butadiene latex: 11~28%, filler: 20~50%, thermally conductive material: 1~4.5%, defoamer: 0.5~1%, dispersant: 1~2%, and the viscosity of the front scraper material is adjusted to 1000-1500 mpa•s with solvent; The filler is at least one of chalk and light calcium carbonate; the thermally conductive material is at least one of nano-alumina, nano-zinc oxide, nano-silicon carbide, and fibrous carbon powder; the defoamer is polyether-modified silicone oil (Zhejiang Xin'an Chemical SL-4176); the dispersant is polyacrylate copolymer solution (Wuxi Liou-AC-7201); and the solvent is water.

[0008] Furthermore, the substrate can be one of polyester fabric, pure cotton fabric, polyester-cotton blended fabric, etc.; the unit weight of the substrate is 200~600 g / m². 2 The width of the substrate is 1350~1650 mm; in the grinding process, the substrate is successively ground by a grinding machine equipped with 240#, 320#, 400# and 400# sanding belts for four passes, and the grinding pressure is 200±50 N.

[0009] Furthermore, in the impregnation process, the amount of impregnating material applied is 30~100 g / m. 2 The viscosity of the impregnating material is 100~600 mPa·s, the drying temperature is 160~190 ℃, and the drying time is 2~4 min; in the front coating process, the coating amount is 40~100 g / m 2 The viscosity of the scraped material is 1000-1500 mpa·s, the drying temperature is 120~180℃, and the drying time is 2~4 min.

[0010] The lamination process involves bonding a substrate to a rigid rubber matrix using an adhesive and then drying the resulting material. Specifically, after applying a slurry to the front side of the substrate, the back side is bonded to one side of the rigid rubber matrix using an adhesive to obtain the treated substrate. In the resulting treated substrate, the side after the slurry application is the adhesive-coated side, and the rigid rubber matrix is ​​the back side. The adhesive is a combination of polyurethane adhesive and latex.

[0011] The present invention provides a processed substrate obtained by the method described above.

[0012] This invention provides a method for preparing a special abrasive for stainless steel wire drawing with high surface finish using the treated substrate, comprising the following steps: (1) Applying primer: Apply primer evenly to the treated substrate; the primer viscosity is 1500~2000 mpa·s, the primer temperature is 38~42℃, and the primer application amount is 75~400 g / m 2 ; (2) Electrostatic sand coating: Diamond and silicon carbide abrasive (preferably in a mass ratio of 1-3:1) are attached to the base adhesive by electrostatic sand coating. The sand coating process is as follows: the sand coating gap is 1500~3500μm, and the sand coating amount is 200-500g / m 2 ; (3) First drying: The product obtained in step (2) is dried once at 85~100℃ for 40min~80min; (4) Applying a layer of adhesive: Applying a layer of adhesive to the surface of the product obtained in step (3); the viscosity of the adhesive is 500~1700 mPa·s, the temperature of the adhesive application is 38~42℃, and the amount of adhesive applied is 75~400 g / m 2 ; (5) Secondary drying: The product obtained in step (4) is dried at 65~115℃ for 100min~120min. (6) Hot winding: The product after secondary drying is wound in a high temperature environment; the hot winding temperature is 100~120℃; (7) Curing: Cur the product obtained in step (6) at 105~130 ℃ for 2 h~5 h; (8) Softening: The product obtained in step (7) is mechanically softened. The softening direction is 45° and 90°, the diameter of the softening knife is 20~30 mm, and the softening pressure is 3~6 bar.

[0013] Specifically, in step (1), the primer composition by weight percentage is as follows: water-soluble phenolic resin: 50-58%, epoxy resin: 10-15%, filler: 30-35%, penetrant: 0.5-1%, reinforcing agent: 0.5-1.5%, dispersant: 0.5-2%, and the primer viscosity is adjusted to 1500-2000 mpa·s with solvent; the filler is one or two of chalk or wollastonite; the penetrant is fatty alcohol polyoxyethylene ether; the reinforcing agent is aminopropyltetraethoxysilane; the dispersant is polyacrylate copolymer solution; and the solvent is water or ethylene glycol ethyl ether.

[0014] Specifically, in step (4), the composition of the composite adhesive by weight percentage is as follows: water-soluble phenolic resin: 40~55%, filler: 40~55%, leveling agent: 0.5~1.5%, reinforcing agent: 0.5~1%, pigment: 0.5~1%, emulsifier: 0.5~2%, and the viscosity of the composite adhesive is adjusted to 500~1700 mpa·s using solvent; the viscosity is adjusted to the value required by the process using solvent. The filler is at least one of chalk, wollastonite, cryolite, potassium fluoroborate, and sodium fluoroborate; the leveling agent is at least one of polyether polyester modified organosiloxane (Dow DOWSIL™ OFX-5247), polyphenylmethylsiloxane (Dow DOWSIL™ 710 Fluid (DC-710)), and organic modified polysiloxane (Hangzhou Ruijiang Chemical Co., Ltd., RJ-7033); the reinforcing agent is aminopropyltetraethoxysilane; the pigment is a water-soluble black pigment; the emulsifier is polyglycerol fatty acid ester; and the solvent is water or ethylene glycol ethyl ether.

[0015] The present invention also provides a special abrasive for stainless steel wire drawing with high surface finish quality prepared by the method described above.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: In the base adhesive of this invention, water-soluble phenolic resin can improve the adhesive strength of the base adhesive; penetrant can improve the permeability of the base adhesive, allowing some of the base adhesive to penetrate into the substrate, which greatly improves the substrate's holding power of the base adhesive; reinforcing agent can improve the adhesive strength of the adhesive to the abrasive; in addition, epoxy resin can improve the flexibility and elasticity.

[0017] In this invention, the composite adhesive consists of water-soluble phenolic resin, resulting in a cured film with high stiffness, good impact resistance, and good heat resistance. Corrosion-resistant inorganic salt fillers and active fillers are added. The active fillers undergo a phase change during grinding, absorbing heat and reducing the heat generated during abrasive grinding, while also providing a grinding aid. Leveling agents allow the composite adhesive to flow better on the abrasive surface. Reinforcing agents improve the bonding strength between the adhesive and the abrasive. Furthermore, improved filler dispersibility enhances the mechanical properties of the adhesive layer.

[0018] In this invention, a hybrid abrasive of silicon carbide and diamond is selected. By treating the substrate to which the abrasive is coated, the substrate is endowed with certain rigidity, strength, flatness, and a good appearance. The process includes two steps: impregnation and front scraping, reducing the need for back scraping and allowing for organic bonding with a hard rubber matrix. Furthermore, to ensure the substrate surface flatness meets requirements, a substrate polishing step is added to eliminate deep pits and unevenness on the substrate surface, ensuring the flatness of the coated abrasive product, increasing grinding life, and improving surface finish. Detailed Implementation

[0019] The technical solution of the present invention will be further described in detail below with reference to the embodiments, but the scope of protection of the present invention is not limited thereto.

[0020] In the following embodiments, all raw materials used are common commercially available products that can be purchased directly, or can be prepared using conventional techniques in the art. Processes not mentioned in detail can be performed using conventional techniques in the art.

[0021] Example 1 A substrate treatment method, wherein the substrate treatment includes: impregnation, front surface grinding, calendering, front surface slurry application, and a composite process with a hard rubber matrix. The impregnating material used is composed of the following by weight percentage: 30% water-soluble phenolic resin, 25% acrylic emulsion, 10% polyvinyl alcohol, 10% styrene-butadiene latex, 20% filler, 1% penetrant, 2% reinforcing agent, and 2% dispersant. The viscosity is adjusted to 200 mPa·s with solvent. The filler is light calcium carbonate; the penetrant is sodium fatty alcohol polyoxyethylene ether phosphate; the reinforcing agent is epoxy resin; the dispersant is lauryl alcohol polyoxyethylene ether; and the solvent is water.

[0022] The composition of the front scraper material used is as follows (by weight percentage): water-soluble phenolic resin: 30%, styrene-butadiene latex: 25%, filler: 40%, thermally conductive material: 2%, defoamer: 1%, dispersant: 2%. The viscosity of the front scraper material is adjusted to 1200 mPa·s with solvent. The filler is chalk; the thermally conductive material is fibrous carbon powder; the defoamer is polyether-modified silicone oil (Zhejiang Xin'an Chemical, SL-4176); the dispersant is polyacrylate copolymer solution (Wuxi Liou-AC-7201); and the solvent is water.

[0023] The substrate is polyester fabric, which is laminated with a rigid rubber matrix; the substrate has a unit weight of 360 g / m². 2 The substrate width is 1650 mm; in the impregnation process, the impregnation material coating amount is 70 g / m². 2 The impregnation material is dried at a temperature of 160~190 ℃ for 3 minutes. In the sanding process, the front side of the substrate is sequentially sanded four times using a sander equipped with 240#, 320#, 400#, and 400# abrasive belts, with a sanding pressure of 200 N. In the front coating process, the coating amount is 60 g / m². 2 The drying temperature for the front-side coating is 120~180 ℃, and the drying time is 3 min. In the substrate lamination process, the back side of the substrate after the front-side coating is bonded to one side of the hard rubber substrate using an adhesive and then dried (80-120℃, 15 min) to obtain the treated substrate. In the resulting treated substrate, the side after the front-side coating is the adhesive-coated side, and the hard rubber substrate is the back side. The adhesive consists of a 1:1 mass ratio of polyurethane adhesive and latex.

[0024] This embodiment also provides a method for preparing a special abrasive for stainless steel wire drawing with high surface finish using the above-mentioned treated substrate. The method includes the following steps: uncoiling the treated substrate, applying a base coat, electrostatic sanding, primary drying, applying a top coat, secondary drying, hot winding, curing, and bending. The details are as follows: (1) Applying primer: Unwind the treated substrate at a speed of 35 m / min and a tension of 650 N; then apply primer evenly to the treated substrate; the primer viscosity is 1500 mpa·s, the primer temperature is 42±2℃, and the primer application amount is 250 g / m 2 ; (2) Electrostatic sand planting: The abrasive is attached to the base adhesive by electrostatic sand planting. The sand planting process is as follows: the sand planting gap is 1800μm and the sand planting amount is 450g / ㎡; the abrasive used is a mixture of diamond and silicon carbide abrasive with a mass ratio of 1:1. (3) The drying process is carried out at a temperature of 85~100℃ and a drying time of 50 min. (4) Applying a layer of adhesive: Applying a layer of adhesive to the surface of the product obtained in step (3); the viscosity of the adhesive is 1200 mPa·s, the temperature of the adhesive application is 42±2℃, and the amount of adhesive applied is 350 g / m 2 ; (5) Secondary drying: The product obtained in step (4) is dried at 70~110℃ for 100 min; (6) Hot winding: The product after secondary drying is wound in a high-temperature environment; the hot winding temperature is 113℃; (7) Curing: The product obtained in step (6) is cured at 115°C for 3.5 h; (8) Softening: The product obtained in step (7) is mechanically softened. The softening direction is 45° and 90°, the diameter of the softening knife is 30 mm, and the softening pressure is 4 bar.

[0025] The primer composition, by weight percentage, is: water-soluble phenolic resin: 52%, epoxy resin: 15%, filler: 30%, penetrant: 1%, reinforcing agent: 1%, dispersant: 1%; the primer viscosity is adjusted to 1500 mPa·s with solvent. The filler is wollastonite; the penetrant is fatty alcohol polyoxyethylene ether; the reinforcing agent is Dow Chemical Z-6011 aminopropyltetraethoxysilane; the dispersant is polyacrylate copolymer solution (Wuxi Liou-AC-7201); and the solvent is Dow Chemical ethylene glycol ethyl ether.

[0026] The composite composition, by weight percentage, is as follows: water-soluble phenolic resin: 55%, filler: 40%, leveling agent: 1%, reinforcing agent: 1%, pigment: 1%, emulsifier: 2%, with the viscosity adjusted to 1200 mPa·s using solvent. The filler is a mixture of wollastonite (20%), cryolite (30%), and potassium fluoroborate (50%); the leveling agent is Dow DOWSIL™ OFX-5247 polyether polyester-modified organosiloxane; the reinforcing agent is aminopropyltetraethoxysilane; the pigment is a water-soluble black pigment; the emulsifier is polyglycerol fatty acid ester; and the solvent is Dow Chemical ethylene glycol ethyl ether.

[0027] The large roll of abrasive prepared in this embodiment was kneaded and left to stand before being made into abrasive belts with a width × circumference of 1600 × 3200 mm. These belts were then mounted on an automatic polishing machine and compared with conventional polishing abrasive cloth (cloth base: polyester cloth, shaped, impregnated, polished, back-scraped, coated with primer, electrostatically coated with abrasive; abrasive: pure silicon carbide, first drying, re-coating, second drying, hot winding, curing, and flexing) for grinding experiments. The grinding object was a 1.3-meter wide stainless steel roll, and the grinding methods were descaling and polishing. The number of meters ground was recorded. The grinding results are shown in Tables 1 to 5 below.

[0028] Table 1. Core grinding performance and surface roughness data of the product in Example 1 Note: Rz is the maximum height of the profile, and Rsm is the average width of the profile unit; the smaller the standard deviation, the better the machining consistency. Table 2, Surface morphology and defect detection data of the product in Example 1 Note: Defects include scratches, burrs, and micro-pits; the smaller the coefficient of variation, the better the texture uniformity. Table 3, Data on wear and grinding force stability of the grinding wheel in Example 1 Note: The coefficient of variation of grinding force reflects the stability of the machining process; the lower the value, the more stable the process. Table 4. Consistency data of mold processing for the same batch of products in Example 1 Table 5. Compatibility data for subsequent processing of the product in Example 1 Note: The smaller the wetting angle, the higher the surface activity, and the stronger the adhesion of electroplating / spraying. As can be seen from the data in Tables 1 to 5, compared with existing conventional silicon carbide abrasive cloths, the abrasives of this application have a smaller standard deviation and better processing consistency; there is no residual oxide scale, the brushed texture has high straightness, good continuity, and uniform spacing; the area of ​​defects such as scratches, burrs, and micro-pits is 0.3% (less than 2.1% of conventional silicon carbide abrasive cloths), and the texture uniformity is better; the coefficient of variation of grinding force is much smaller than that of conventional silicon carbide abrasive cloths, indicating better processing stability; the consistency of processing within the same batch of abrasives is better; and the compatibility of subsequent processing is superior.

[0029] Example 2 A substrate treatment method, wherein the substrate treatment includes: impregnation, front surface grinding, calendering, front surface slurry application, and a composite process with a hard rubber matrix. The impregnating material used is composed of the following by weight percentage: 30% water-soluble phenolic resin, 25% acrylic emulsion, 10% polyvinyl alcohol, 10% styrene-butadiene latex, 20% filler, 1% penetrant, 2% reinforcing agent, and 2% dispersant. The viscosity is adjusted to 200 mPa·s with solvent. The filler is light calcium carbonate; the penetrant is sodium fatty alcohol polyoxyethylene ether phosphate; the reinforcing agent is epoxy resin; the dispersant is lauryl alcohol polyoxyethylene ether; and the solvent is water.

[0030] The composition of the front scraper material used is as follows (by weight percentage): water-soluble phenolic resin: 30%, styrene-butadiene latex: 25%, filler: 40%, thermally conductive material: 2%, defoamer: 1%, dispersant: 2%. The viscosity of the front scraper material is adjusted to 1200 mPa·s with solvent. The filler is chalk; the thermally conductive material is fibrous carbon powder; the defoamer is polyether-modified silicone oil (Zhejiang Xin'an Chemical SL-4176); the dispersant is polyacrylate copolymer solution (Wuxi Liou-AC-7201); and the solvent is water.

[0031] The substrate is polyester fabric, which is laminated with a rigid rubber matrix; the substrate has a unit weight of 360 g / m². 2 The substrate width is 1650 mm; in the impregnation process, the impregnation material coating amount is 70 g / m². 2 The impregnation material is dried at a temperature of 160~190 ℃ for 3 minutes. In the sanding process, the front side of the substrate is sequentially sanded four times using a sander equipped with 240#, 320#, 400#, and 400# abrasive belts, with a sanding pressure of 200 N. In the front coating process, the coating amount is 60 g / m². 2 The drying temperature for the front-side coating is 120~180 ℃, and the drying time is 3 min. In the substrate lamination process, the back side of the substrate after the front-side coating is bonded to one side of the hard rubber substrate using an adhesive and then dried (80-120℃, 15 min) to obtain the treated substrate. In the resulting treated substrate, the side after the front-side coating is the adhesive-coated side, and the hard rubber substrate is the back side. The adhesive consists of a 1:1 mass ratio of polyurethane adhesive and latex.

[0032] This embodiment also provides a method for preparing a special abrasive for stainless steel wire drawing with high surface finish using the above-mentioned treated substrate. The method includes the following steps: uncoiling the treated substrate, applying a base coat, electrostatic sanding, primary drying, applying a top coat, secondary drying, hot winding, curing, and bending. The details are as follows: (1) Applying primer: Unwind the treated substrate at a speed of 35 m / min and a tension of 650 N; then apply primer evenly to the treated substrate; the primer viscosity is 1500 mpa·s, the primer temperature is 42±2℃, and the primer application amount is 250 g / m 2 ; (2) Electrostatic sand planting: The abrasive is attached to the base adhesive by electrostatic sand planting. The sand planting process is as follows: the sand planting gap is 1800μm and the sand planting amount is 450g / ㎡; the abrasive used is a mixture of diamond and silicon carbide abrasive with a mass ratio of 7:3. (3) The drying process is carried out at a temperature of 85~100 ℃ and a drying time of 50 min. (4) Applying a layer of adhesive: Applying a layer of adhesive to the surface of the product obtained in step (3); the viscosity of the adhesive is 1200 mPa·s, the temperature of the adhesive application is 42±2℃, and the amount of adhesive applied is 350 g / m 2 ; (5) Secondary drying: The product obtained in step (4) is dried at 70~110 ℃ for 100 min; (6) Hot winding: The product after secondary drying is wound in a high-temperature environment; the hot winding temperature is 113℃; (7) Curing: The product obtained in step (6) is cured at 115°C for 3.5 h; (8) Softening: The product obtained in step (7) is mechanically softened. The softening direction is 45° and 90°, the diameter of the softening knife is 30 mm, and the softening pressure is 4 bar.

[0033] By weight percentage, the primer composition is: water-soluble phenolic resin: 52%, epoxy resin: 15%, filler: 30%, penetrant: 1%, reinforcing agent: 1%, dispersant: 1%; the primer viscosity is adjusted to 1500 mPa·s with solvent. The filler is chalk; the penetrant is fatty alcohol polyoxyethylene ether; the reinforcing agent is Dow Chemical Z-6011 aminopropyltetraethoxysilane; the dispersant is a polyacrylate copolymer solution; and the solvent is Dow Chemical ethylene glycol ethyl ether.

[0034] The composite composition, by weight percentage, is as follows: water-soluble phenolic resin: 55%, filler: 40%, leveling agent: 1%, reinforcing agent: 1%, pigment: 1%, emulsifier: 2%, with the viscosity adjusted to 1200 mPa·s using solvent. The filler is a mixture of wollastonite (20%), cryolite (50%), and potassium fluoroborate (30%); the leveling agent is Dow DOWSIL™ OFX-5247 polyether polyester-modified organosiloxane; the reinforcing agent is aminopropyltetraethoxysilane; the pigment is a water-soluble black pigment; the emulsifier is polyglycerol fatty acid ester; and the solvent is Dow Chemical ethylene glycol ethyl ether.

[0035] The large roll of abrasive prepared in this embodiment was kneaded and left to stand before being made into abrasive belts with a width × circumference of 1600 × 3200 mm. These belts were then mounted on an automatic polishing machine and compared with conventional polishing abrasive cloth (cloth base: polyester cloth, shaped, impregnated, polished, back-scraped, coated with primer, electrostatically coated with abrasive; abrasive: pure silicon carbide, first drying, re-coating, second drying, hot winding, curing, and flexing) in a grinding experiment. The grinding object was a 1.3-meter wide stainless steel roll, and the grinding methods were descaling and polishing. The number of meters ground was recorded. The grinding results are shown in Tables 6 to 10.

[0036] Table 6. Core grinding performance and surface roughness data of the product in Example 2 Note: Rz is the maximum height of the profile, and Rsm is the average width of the profile unit; the smaller the standard deviation, the better the machining consistency. Table 7. Surface morphology and defect detection data of the product in Example 2 Note: Defects include scratches, burrs, and micro-pits; the smaller the coefficient of variation, the better the texture uniformity. Table 8. Data on wear and grinding force stability of the grinding wheel in Example 2 Note: The coefficient of variation of grinding force reflects the stability of the machining process; the lower the value, the more stable the process. Table 9. Consistency data of mold processing for the same batch of products in Example 2 Table 10, Compatibility data for subsequent processing of products in Example 2 Note: The smaller the wetting angle, the higher the surface activity and the stronger the adhesion of electroplating / spraying. As can be seen from the data in Tables 6 to 10, compared with existing conventional silicon carbide abrasive cloths, the abrasives of this application have a smaller standard deviation and better processing consistency; there is no residual oxide scale, the brushed texture has high straightness, good continuity, and uniform spacing; the area of ​​defects such as scratches, burrs, and micro-pits is 0.3% (less than 2.1% of conventional silicon carbide abrasive cloths), and the texture uniformity is better; the coefficient of variation of grinding force is much smaller than that of conventional silicon carbide abrasive cloths, indicating better processing stability; the consistency of processing within the same batch of abrasives is better; and the compatibility of subsequent processing is superior.

Claims

1. A method of treating a substrate, characterized by, The substrate treatment comprises: dipping, front polishing, calendering, front squeegeeing, and a hard rubber matrix compounding process; The dipping material composition comprises, by weight percentage: water-soluble phenolic resin: 10-35%, acrylic emulsion: 20-30%, polyvinyl alcohol: 5-15%, styrene-butadiene latex: 5-15%, filler: 15-25%, penetrant: 0.5-1%, reinforcing agent: 1-3%, dispersant: 1-5%; solvent is used to adjust the viscosity to 100-600 mpa·s; The filler is light calcium; the penetrant is sodium fatty alcohol polyoxyethylene ether phosphate; the reinforcing agent is epoxy resin; the dispersant is at least one of nonylphenol polyoxyethylene ether and lauryl alcohol polyoxyethylene ether; and the solvent is water.

2. The substrate treatment method according to claim 1, wherein The front squeegee material composition comprises, by weight percentage: water-soluble phenolic resin: 20-35%, styrene-butadiene latex: 11-28%, filler: 20-50%, heat-conducting material: 1-4.5%, defoaming agent: 0.5-1%, dispersant: 1-2%; solvent is used to adjust the viscosity to 1000-1500 mpa·s; The filler is at least one of chalk and light calcium carbonate; the heat-conducting material is at least one of nano-alumina, nano-zinc oxide, nano-silicon carbide, and fibrous carbon powder; the defoaming agent is polyether-modified silicone oil; the dispersant is polyacrylate copolymer solution; and the solvent is water.

3. The substrate treatment method according to claim 1, wherein The base material is one of polyester cloth, pure cotton cloth and polyester cotton blended cloth; the base material has a single weight of 200-600 g / m 2 ; the base material has a width of 1350-1650 mm; in the polishing process, the base material sequentially passes through four polishing machines provided with 240#, 320#, 400# and 400# abrasive belts, and the polishing pressure is 200±50 N.

4. The substrate treatment method according to claim 1, wherein In the impregnation process, the impregnation material coating amount is 30-100 g / m 2 , the impregnation material drying temperature is 160-190 ℃, and the drying time is 2-4 min; in the front side doctoring process, the front doctoring material coating amount is 40-100 g / m 2 , the front doctoring material drying temperature is 120-180 ℃, and the drying time is 2-4 min.

5. The substrate treatment method according to Claim 1, wherein The compounding is to bond the back of the front-squeegeed substrate to the hard rubber matrix by using an adhesive to obtain a treated substrate, wherein the front-squeegeed surface of the treated substrate is a rubber-coated surface, and the hard rubber matrix is the back surface.

6. A treated substrate obtained by the method of any one of claims 1 to 5.

7. A method for preparing a special abrasive for stainless steel wire drawing with high surface finish using the substrate treatment method described in claim 6, characterized in that, The method comprises the following steps: (1) Primer application: uniformly applying a primer to the treated substrate; the primer has a viscosity of 1500-2000 mPa-s, the primer has a temperature of 38-42°C; the primer has a coating amount of 75-400 g / m 2 ; (2) electrostatic sanding: the diamond and silicon carbide abrasive are attached to the primer by electrostatic sanding, and the sanding process is as follows: sanding gap 1500-3500 μm, sanding amount 200-500 g; (3) first drying: the product obtained in step (2) is dried at 85-100 ℃ for 40 min-80 min; (4) coating glue: coating a layer of glue on the surface of the product obtained in step (3); the viscosity of the glue is 500-1700 mpa·s, the temperature of the glue is 38-42℃; the coating amount of the glue is 75-400 g / m 2 ; (5) second drying: the product obtained in step (4) is dried at 65-115 ℃ for 100 min-120 min; (6) hot winding: the product after the second drying is wound in a high-temperature environment; the hot winding temperature is 100-120 ℃; (7) curing: the product obtained in step (6) is cured at 105-130 ℃ for 2 h-5 h; (8) softening: the product obtained in step (7) is mechanically softened, the softening direction is 45° and 90° softening, the softening knife diameter is 20-30 mm, and the softening pressure is 3-6 bar, thereby obtaining the product.

8. The method of claim 7, wherein the high surface finish quality stainless steel wire drawing die is prepared by the steps of: In step (1), the primer composition comprises, by weight percentage: water-soluble phenolic resin: 50-58%, epoxy resin: 10-15%, filler: 30-35%, penetrating agent: 0.5-1%, reinforcing agent: 0.5-1.5%, dispersing agent: 0.5-2%, and solvent to adjust the viscosity of the primer to 1500-2000 mpa·s; the filler is one or both of chalk or wollastonite; the penetrating agent is fatty alcohol polyoxyethylene ether; the reinforcing agent is aminopropyl tetraethoxysilane; the dispersing agent is polyacrylate copolymer solution; and the solvent is water or ethylene glycol ethyl ether. ​ 9. The method for preparing a special abrasive for drawing stainless steel with high surface finish as described in claim 7, characterized in that, In step (3), the topcoat composition comprises, by weight percentage: water-soluble phenolic resin: 40-55%, filler: 40-55%, leveling agent: 0.5-1.5%, reinforcing agent: 0.5-1%, pigment: 0.5-1%, emulsifier: 0.5-2%, and solvent to adjust the viscosity of the topcoat to 500-1700 mpa·s; the filler is at least one of chalk, wollastonite, ice crystal, potassium fluoborate, and sodium fluoborate; the leveling agent is at least one of polyether polyester modified organosiloxane, polyphenylmethylsiloxane, and organically modified polysiloxane; the reinforcing agent is aminopropyl tetraethoxysilane; the pigment is water-soluble black pigment; the emulsifier is polyglycerol fatty acid ester; and the solvent is water or ethylene glycol ethyl ether.

10. The high-surface-finished-quality stainless steel wire-drawing special abrasive tool prepared by the method of any one of claims 7-9.

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