Novel polishing material of abrasive accumulation and its preparation process

Abstract

The present application relates to the field of polymeric abrasive, in particular to a new type of stacked abrasive polishing material and its preparation process.The present application is prepared by the following steps: step (1) immersing the base material into the adhesive, after soaking, making a back layer on one side of the base material, obtaining a pretreated base material; step (2) bottom glue coating: scraping the bottom glue on the other side of the pretreated base material, obtaining the glue coated base material; step (3) sanding: uniformly sanding the bottom glue side of the glue coated base material, the sanding particles are tetrapods, then coating a layer of compound glue, after drying, obtaining the semi-finished product; step (4) curing: heating and curing the semi-finished product for 6h-24h, obtaining the new type of stacked abrasive polishing material.The new type of stacked abrasive polishing material prepared by the present application has the characteristics of long service life, good heat dissipation performance and stable roughness.

Description

Technical Field

[0001] This invention relates to the field of polymeric abrasives, specifically to a novel deposited abrasive grinding and polishing material and its preparation process. Background Technology

[0002] Traditional abrasive polishing materials are mostly applied as single-layer abrasives to polish various materials. These materials suffer from low strength, low thermal conductivity, and poor toughness, making them prone to adhesion and burning during polishing. Furthermore, the surface roughness of traditional abrasive polishing materials becomes highly unstable throughout the polishing process, as the abrasive wears off. The emergence of new types of deposited abrasives can effectively solve or mitigate these problems.

[0003] Because the new type of abrasive is formed by pre-aggregating individual abrasive particles into a fixed shape using a special adhesive, new abrasive particles are constantly exposed during the grinding process as old abrasive particles fall off. Therefore, the lifespan of the new abrasive grinding and polishing material is more than 10 times that of ordinary materials, and it also maintains a stable surface roughness.

[0004] CN 111002235 B discloses a novel method for preparing polymeric abrasives. The method involves uniformly mixing composite abrasives to form abrasive powder, then adding a binder, followed by bonding, curing, pulverizing, and sieving to obtain polymeric abrasives of different particle sizes. Specifically: (1) The composite abrasives are stirred and mixed uniformly, and then ground into abrasive powder; (2) A binder is added to the abrasive powder for bonding, followed by curing; (3) The cured material is pulverized, and a suitable sieve is selected for sieving using a vibrating screen. Larger particles are pulverized again until they are sieved into polymeric abrasives of the desired particle size. CN 102729158 B discloses an organic binder-bonded abrasive and a method for manufacturing abrasive cloth using the abrasive. The method uses an organic polymer as a binder and abrasive particle clusters as the main body, integrating active heat-absorbing materials, inorganic heat-absorbing materials, inert grinding aids, and lubricating materials. It employs low-temperature curing to obtain approximately equivolute abrasive units; providing uniformly structured "cold-bonded abrasive" for abrasive cloth and belt manufacturing. It also discloses two methods for forming abrasive cloth from the abrasive, one of which is a slip-roller spreader used to evenly spread the abrasive onto a substrate surface. In the production of novel abrasive grinding and polishing materials, the durability of the substrate, the smoothness of the abrasive surface, and the service life of the grinding material are all crucial aspects; the above solution does not address these three key points. Summary of the Invention

[0005] To address the aforementioned problems, this invention develops a product characterized by long lifespan, excellent heat dissipation, and stable surface roughness.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A method for preparing a novel abrasive grinding and polishing material includes the following steps:

[0008] Step (1) Impregnation and back coating: Immerse the substrate in the adhesive, dry it at 130℃-180℃, and after drying, apply a 30μm-100μm back base layer to one side of the substrate with a back base slurry to obtain a pretreated substrate.

[0009] Step (2) Primer coating: Apply a primer with a thickness of 40μm-150μm to the other side of the pretreated substrate and dry it at 70℃-140℃ for 70min-150min to obtain the coated substrate.

[0010] Step (3) Sand application: Apply sand evenly to the base coat side of the substrate. The sand particles are truncated pyramidal in shape, with a size of 0.6mm-2.2mm, and are distributed at a rate of 400g-1000g per square meter. Then apply a top coat of adhesive at a rate of 550g / m². 2 -1100 g / m 2 Dry at 70℃-140℃ for 70-150 minutes to obtain a semi-finished product;

[0011] Step (4) Curing: The semi-finished product is heated and cured at 70℃-160℃ for 6h-24h to obtain a new type of abrasive grinding and polishing material.

[0012] The substrate is one of heavy-duty paper, mesh cloth, or film substrate;

[0013] In step (1), the adhesive is one or more of polyimide resin, polyurethane resin or acrylic resin.

[0014] This design scheme has the following main features:

[0015] 1. This solution uses heavy-duty paper, mesh fabric, or film substrate as the base material, which features high interlayer peel strength, high strength, and durability. To maintain these excellent properties, the substrate is first impregnated to ensure full bonding between the substrate and the backing coating and primer. This ensures that the grinding material will not peel or deform under external forces during use, and will not suffer from low lifespan due to substrate wear and tear. The backing layer design helps to improve the strength and stiffness of the substrate and prevents slippage during grinding. Even under impact, the substrate is not easily deformed.

[0016] 2. The thickness of the base adhesive, the size and distribution of the abrasive particles, and the amount of the top coat all affect the performance of the new deposited abrasive polishing material. If the base adhesive is too thick, the abrasive particles will be immersed too deeply, affecting grinding efficiency; if the base adhesive is too thin, the abrasive particles will be immersed too shallowly, making them prone to detachment; if the abrasive particles are too large, the surface roughness will be too high, hindering polishing; if the abrasive particles are too small, grinding efficiency will be affected. The main function of the top coat is to further fix the abrasive particles. If the top coat is applied too lightly, the particles will easily detach; if the application is too heavy, polishing efficiency will be affected.

[0017] 3. This design uses a truncated pyramid shape for the abrasive particles. This shape provides better flatness when manufacturing polishing materials, allowing for better workpiece contact during polishing. Furthermore, the large base area of ​​the truncated pyramid shape facilitates fixation within the base adhesive, while the small top surface area ensures consistent sharpness, a longer lifespan, and stable surface roughness. Additionally, the particles are bonded to the abrasive powder using an adhesive, resulting in synchronous abrasive wear during polishing and improved polishing efficiency. Gravity-based abrasive placement is used, with two baffles dispersing the abrasive particles neatly arranged on the placement surface. However, due to variations in particle size, after the base adhesive dries, a special grinding process is employed to cut the abrasive particles into uniformly flat sections, ensuring stable roughness from the initial polishing stage. The abrasive height is adjusted by changing the gap between the particles.

[0018] Preferably, the film substrate is a polyimide film or a polyethylene terephthalate film with a thickness of 100μm-200μm.

[0019] Preferably, the substrate is heavy-duty paper, and the weight of the heavy-duty paper is 250g-400g per square meter.

[0020] Preferably, in step (1), the backing slurry comprises the following components: by weight, 40-100 parts of adhesive A, 5-10 parts of thickener, 0.1-2.0 parts of wetting agent, 5-10 parts of antislip agent and 0-20 parts of diluent.

[0021] Preferably, the adhesive A is one or more of polyimide resin, polyurethane resin, or acrylic resin; the thickener is one or more of methylcellulose, hydroxypropyl methylcellulose, sodium carboxymethylcellulose, or hydroxyethylcellulose; the wetting agent is one of dehydrated sorbitan fatty acid, polyoxyethylene alkylphenol ether, or polyoxyethylene fatty alcohol ether; the antislip agent is one of calcium carbonate, kaolin, or silica; and the diluent is water.

[0022] Adhesive A is one or more of polyimide resin, polyurethane resin, or acrylic resin. After curing, it exhibits excellent strength and water resistance, and its high strength ensures that the substrate will not easily deform during use. The thickener is a cellulose-based thickener, typically one or more of methylcellulose, hydroxypropyl methylcellulose, sodium carboxymethyl cellulose, or hydroxyethyl cellulose. Its thickening principle is through hydrogen bonding with surrounding water molecules, thereby reducing the space for free particle movement and further increasing the viscosity of the system. The wetting agent is one of dehydrated sorbitan fatty acid, polyoxyethylene alkylphenol ether, or polyoxyethylene fatty alcohol ether. Its main function is to reduce interfacial tension, making the adhesion between the coating slurry and the substrate tighter. The anti-slip agent is generally calcium carbonate, kaolin, or silica to improve the thixotropy of the slurry, making it easier to apply. It also increases the friction of the substrate, preventing slippage of the abrasive material during use. The diluent is water, mainly used to adjust the solid content and viscosity of the slurry.

[0023] Preferably, in step (1), the impregnation amount is 30-60 g / m 2 .

[0024] That is, the weight gain after soaking is 30-60g / m³. 2 .

[0025] Preferably, in step (2), the base adhesive comprises the following components: by weight, 30-90 parts of adhesive B, 10-40 parts of filler, 0.1-2.0 parts of leveling agent, 0.1-2.0 parts of coupling agent, and 0-40 parts of diluent.

[0026] Preferably, the adhesive B comprises the following components: 10-20 parts by weight of epoxy resin or phenolic resin, and 1-3 parts by weight of polyurethane resin or acrylic resin; the filler is one or more of wollastonite, calcium carbonate, and calcium sulfate; the leveling agent is one of polyether-modified dimethylpolysiloxane, polyester-modified polydimethylsiloxane, or polyester-modified organosilicon; the coupling agent is one of silane coupling agents KH550 and KH560; and the diluent is one or a mixture of water, ethanol, tetrahydrofuran, and ethylene glycol ether.

[0027] The adhesive's main components are epoxy resin or phenolic resin, with the addition of polyurethane resin and acrylic resin for toughening and increased adhesion. Its primary function is to bond the substrate and abrasive together tightly. The fillers used are one or more of wollastonite, calcium carbonate, and calcium sulfate, designed to improve the strength of the primer and reduce air bubbles generated during drying due to solvent evaporation. The leveling agent used is one of polyether-modified dimethylpolysiloxane, polyester-modified dimethylsiloxane, or polyester-modified silicone. Its function is to ensure a smoother spread of the primer on the substrate surface, preventing pinholes or streaks. The coupling agent used is one of silane coupling agents KH550 and KH560. Its function is to promote the bonding between the adhesive and the abrasive. The diluent is one or a mixture of water, ethanol, tetrahydrofuran, and ethylene glycol ether. Its function is to adjust the viscosity of the adhesive, ensuring greater stability during drying.

[0028] The coating method is scraping, which eliminates the tunnel texture on the surface of the roller coating method, making the sanded surface smoother and more uniform, and greatly improving the surface quality of the polished workpiece.

[0029] Preferably, in step (3), the method for preparing the planting sand particles includes the following steps:

[0030] Step (a): Cyclone the abrasive powder to obtain a spare powder with an average particle size of less than 10 μm;

[0031] Step (b): By weight, add 1 part of spare powder to 1-2 parts of water, add 0.01-0.03 parts of silane coupling agent, grind in a sand mill for 30-60 minutes, dehydrate, dry, and then add to 0.3-0.5 parts of binder. After homogenization, obtain granular slurry.

[0032] Step (c): Inject the granular slurry into the mold, treat it under vacuum for 3-5 minutes, add slurry, heat and cure it at 70℃-160℃ for 3-5 hours, and demold to obtain sand-planted granules.

[0033] The particle size of the planting sand can be controlled between 0.6mm and 2.2mm, and the strength of a single particle is between 5N and 50N. The mold shape of this solution is a truncated pyramid, but it can also be other shapes depending on the requirements.

[0034] Preferably, the abrasive powder in step (a) is one or more of zirconium oxide powder, silicon carbide powder, alumina powder, and diamond powder.

[0035] The granules prepared in this method are first cyclone-processed to remove coarse particles. The presence of coarse particles acts as a crack initiation point, reducing the strength of the abrasive particles and ultimately decreasing the wear resistance of the new abrasive grinding and polishing material. Secondly, the prepared powder and a silane coupling agent are finely ground in a sand mill to improve the surface properties of the powder, enhance dispersion with the binder, and increase the bonding strength. KH550 can be used as the silane coupling agent. Homogenization in the binder can be achieved through high-speed stirring, ball milling, or other methods, solely to ensure the abrasive particles have uniform and stable properties. Finally, the vacuum treatment before curing is to remove air from the granule slurry in the mold, as air is another factor that reduces the strength of the abrasive particles.

[0036] Preferably, the adhesive is a ceramic adhesive or a phenolic resin adhesive.

[0037] Preferably, in step (3), the adhesive comprises the following components: 30-90 parts of adhesive C, 20-70 parts of filler, 5-15 parts of heat absorber, 0.1-3.0 parts of dispersant, 0.1-3.0 parts of thixotropic agent, and 0-50 parts of diluent.

[0038] Preferably, the adhesive C is a phenolic resin or an epoxy resin; the heat absorber is one or more of potassium fluoroborate, zinc stearate, calcium stearate, sodium cryolite, or potassium cryolite; the filler is one of bentonite, kaolin, or fumed silica; the dispersant is one of polyether-modified trisiloxane, polyether-modified polysiloxane, or polyether-siloxane copolymer; the thixotropic agent is hydrogenated castor oil; and the diluent is one or a mixture of water, ethanol, tetrahydrofuran, or ethylene glycol ether.

[0039] Adhesive C is a phenolic resin or epoxy resin, its main function being to fix the abrasive. The heat absorber used is one or more of potassium fluoroborate, zinc stearate, calcium stearate, sodium cryolite, or potassium cryolite. Its purpose is to absorb the heat generated during grinding, increase the life of the abrasive material, and prevent damage to the workpiece due to excessive heat. The filler used is one of bentonite, kaolin, and fumed silica. Its purpose is to reduce the solid content of the adhesive, increase its viscosity, reduce the penetration of the adhesive into the abrasive, and ensure synchronous wear of the abrasive. The dispersant used is one of polyether-modified trisiloxane, polyether-modified polysiloxane, and polyether-siloxane copolymer. Its main function is to improve the dispersion of fillers in the adhesive and prevent filler sedimentation. The thixotropic agent used is one of hydrogenated castor oil, propylene glycol, and fumed silica. Its function is to ensure that the adhesive remains uniformly on the abrasive surface, providing better protection for the abrasive during use. The diluent is one or a mixture of water, ethanol, tetrahydrofuran, and ethylene glycol ether. Its function is to adjust the viscosity of the adhesive, ensuring that the adhesive is more stable during the drying process and does not produce bubbles.

[0040] This solution also proposes a method for preparing the aforementioned novel abrasive grinding and polishing material, resulting in a novel abrasive grinding and polishing material. Structurally, the novel abrasive grinding and polishing material of this solution includes: a layer of planted sand particles coated with a backing adhesive layer, the planted sand particles being embedded in a base adhesive, the base adhesive being attached to one side of a substrate, and a backing substrate being coated on the other side of the substrate. The backing substrate primarily serves a supporting function, while the base adhesive and the backing adhesive fix the planted sand particles to the substrate. The planted sand particles are the main functional component for grinding and polishing.

[0041] Compared to existing technologies, the technical advantages of this solution are:

[0042] (1) This solution uses heavy-duty paper, mesh cloth or multi-layer film with high interlayer peel strength, high strength and durability as the base material of the new type of abrasive grinding and polishing material, and ensures that the grinding material has a lifespan and durability that match the abrasive during use through impregnation and scraping technology.

[0043] (2) The novel abrasive grinding and polishing material of this scheme has prepared sand particles with unique shape and strength. Compared with traditional abrasive grinding materials, it has a service life of more than 10 times and has a stable grinding effect in the early, middle and late stages of grinding.

[0044] (3) The present invention adopts a special composite adhesive formula, which incorporates special fillers and thixotropic agents, thereby ensuring that the adhesive is applied to a thin layer on the surface of the sand particles and does not easily penetrate the abrasive. This provides protection and strength for the new type of abrasive grinding and polishing material, while ensuring the synchronous wear and polishing effect of the material. It is suitable for grinding and polishing metals and painted surfaces. Detailed Implementation

[0045] The preferred embodiments of the present invention are described below. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0046] Example 1

[0047] A method for preparing a novel abrasive grinding and polishing material includes the following steps:

[0048] Step (1) Impregnation and back coating: Immerse 250g / m² of heavy paper in acrylic resin, and dry at 130℃ after impregnation. The impregnation amount is 35g / m². 2 Then, a 50μm backing layer is scraped onto one side of the heavy paper using a backing paste to obtain a pretreated substrate.

[0049] The backing slurry comprises the following components by weight: 100 parts adhesive A, 5 parts thickener, 0.5 parts wetting agent, 5 parts anti-slip agent, and 10 parts diluent; adhesive A is polyimide resin; thickener is methylcellulose; wetting agent is dehydrated sorbitan fatty acid; anti-slip agent is a mixture of 3 parts calcium carbonate and 2 parts silica; diluent is water.

[0050] Step (2) Primer coating: Apply a 60μm thick primer to the other side of the pretreated substrate and dry it at 120℃ for 70min to obtain the coated substrate.

[0051] The base adhesive comprises the following components by weight: 60 parts adhesive B, 25 parts filler, 0.5 parts leveling agent, 0.5 parts coupling agent, and 10 parts diluent; adhesive B is a mixture of 20 parts epoxy resin and 1 part polyurethane resin; the filler is a mixture of wollastonite, calcium carbonate, and calcium sulfate in a mass ratio of 1:1:1; the leveling agent is polyether-modified dimethyl polysiloxane; the coupling agent is silane coupling agent KH550; and the diluent is water.

[0052] Step (3) Sand Planting: Sand is evenly planted on the base adhesive side of the substrate using a gravity sand planting method. The sand particles are truncated pyramidal in shape, 1.2 mm in size, and distributed at a rate of 500 g of sand per square meter. Then, a layer of top adhesive is applied, with a top adhesive application rate of 600 g / m². 2 Dry at 120℃ for 80 minutes to obtain a semi-finished product;

[0053] The composite adhesive comprises the following components: 60 parts of adhesive C, 50 parts of filler, 10 parts of heat absorber, 1.0 part of dispersant, 1.0 part of thixotropic agent, and 20 parts of diluent; adhesive C is phenolic resin; the heat absorber is a mixture of potassium fluoroborate, zinc stearate, and calcium stearate in a mass ratio of 1:1:1; the filler is bentonite; the dispersant is polyether-modified trisiloxane; the thixotropic agent is hydrogenated castor oil; and the diluent is water.

[0054] The preparation method of planting sand particles includes the following steps:

[0055] Step (a): Cyclone the abrasive powder to obtain a spare powder with an average particle size of less than 10 μm; the abrasive powder is a mixture of zirconium oxide powder, silicon carbide powder, alumina powder and diamond powder in a weight ratio of 1:1:1:1.

[0056] Step (b): By weight, add 1 part of spare powder to 1 part of water, add 0.01 part of KH550 silane coupling agent, grind in a sand mill for 30 minutes, dehydrate, dry, and then add to 0.3 parts of binder. After homogenization by high-speed stirring, obtain granular slurry; the binder is a ceramic binder.

[0057] Step (c): The granular slurry is injected into the mold cavity to form a truncated pyramid mold. It is treated under vacuum for 5 minutes, and after slurry replenishment, it is heated and cured at 120°C for 4 hours. After demolding, 1.2 mm sand-planting granules are obtained, with a single particle strength of 30 N.

[0058] Step (4) Curing: The semi-finished product is heated and cured at 120°C for 18 hours to obtain a new type of abrasive grinding and polishing material.

[0059] Example 2

[0060] A method for preparing a novel abrasive grinding and polishing material includes the following steps:

[0061] Step (1) Impregnation and back coating: Immerse a 150μm thick polyimide film in polyurethane resin, dry it at 150℃, and then coat a 30μm thick backing layer with a backing material slurry on one side of the polyimide film to obtain a pretreated substrate. The impregnation amount is 55g / m. 2 ;

[0062] The backing slurry comprises the following components by weight: 40 parts adhesive A, 8 parts thickener, 1 part wetting agent, 7 parts anti-slip agent, and 15 parts diluent; adhesive A is acrylic resin; the thickener is one or more of hydroxypropyl methylcellulose; the wetting agent is polyoxyethylene alkylphenol ether; the anti-slip agent is kaolin; and the diluent is water.

[0063] Step (2) Primer coating: Apply a 120μm thick primer to the other side of the pretreated substrate and dry it at 70℃ for 120min to obtain the coated substrate.

[0064] The base adhesive comprises the following components: by weight, 90 parts of adhesive B, 40 parts of filler, 1.5 parts of leveling agent, 0.8 parts of coupling agent, and 30 parts of diluent; adhesive B comprises the following components: by weight, 10 parts of phenolic resin and 1 part of acrylic resin; the filler is calcium carbonate; the leveling agent is polyester-modified polydimethylsiloxane; the coupling agent is silane coupling agent KH560; and the diluent is ethanol.

[0065] Step (3) Sand Planting: Sand is evenly planted on the base adhesive side of the substrate using a gravity sand planting method. The sand particles are truncated pyramidal in shape, 1.8mm in size, and distributed at a rate of 1000g of sand per square meter. Then, a layer of top adhesive is applied, with a top adhesive application rate of 1000g / m². 2 Dry at 130℃ for 100 minutes to obtain a semi-finished product;

[0066] The composite adhesive comprises the following components: 70 parts of adhesive C, 30 parts of filler, 12 parts of heat absorber, 2.0 parts of dispersant, 1.5 parts of thixotropic agent, and 30 parts of diluent; adhesive C is epoxy resin; the heat absorber is sodium cryolite; the filler is kaolin; the dispersant is polyether-modified polysiloxane; the thixotropic agent is hydrogenated castor oil; and the diluent is tetrahydrofuran water.

[0067] The preparation method of planting sand particles includes the following steps:

[0068] Step (a): Cyclone the abrasive powder to obtain a spare powder with an average particle size of less than 10 μm; the abrasive powder is zirconium oxide powder;

[0069] Step (b): By weight, add 1 part of spare powder to 1.5 parts of water, add 0.02 parts of silane coupling agent K550, mix and grind in a sand mill for 30 minutes, dehydrate, dry, and then add to 0.5 parts of binder. After homogenization, obtain granular slurry; the binder is phenolic resin binder.

[0070] Step (c): Inject the granular slurry into the mold, treat it under vacuum for 3 minutes, add slurry, heat and cure it at 120℃ for 3 hours, and demold to obtain sand-planted granules; demold to obtain 1.8mm sand-planted granules with a single particle strength of 46N;

[0071] Step (4) Curing: The semi-finished product is heated and cured at 80°C for 24 hours to obtain a new type of abrasive grinding and polishing material.

[0072] Example 3

[0073] A method for preparing a novel abrasive grinding and polishing material includes the following steps:

[0074] Step (1) Impregnation and back coating: Immerse the substrate in the adhesive, dry it at 180°C, and after drying, apply an 80μm back coating of backing material to one side of the substrate to obtain the pretreated substrate; the impregnation amount is 32g / m 2 .

[0075] The backing slurry comprises the following components by weight: 70 parts of adhesive A, 9 parts of thickener, 1.6 parts of wetting agent, 6 parts of anti-slip agent, and 16 parts of diluent; adhesive A is acrylic resin; the thickener is sodium carboxymethyl cellulose; the wetting agent is polyoxyethylene fatty alcohol ether; the anti-slip agent is one of silica; and the diluent is water.

[0076] Step (2) Primer Coating: Apply a 140 μm thick primer to the other side of the pretreated substrate and dry it at 130°C for 140 min to obtain the coated substrate; the primer includes the following components: by weight, 70 parts of adhesive B, 30 parts of filler, 0.6 parts of leveling agent, 0.8 parts of coupling agent, and 8 parts of diluent; the adhesive B includes the following components: by weight, 15 parts of epoxy resin and 1 part of polyurethane resin; the filler is wollastonite; the leveling agent is polyester-modified polydimethylsiloxane; the coupling agent is silane coupling agent KH550; and the diluent is ethylene glycol ether;

[0077] Step (3) Sand Planting: Sand is evenly planted on the base adhesive side of the substrate using a gravity sand planting method. The sand particles are truncated pyramidal in shape, 0.9 mm in size, and distributed at a rate of 700 g of sand per square meter. Then, a layer of top adhesive is applied, with a top adhesive application rate of 600 g / m². 2 The product is dried at 100℃ for 110 minutes to obtain a semi-finished product. The composite adhesive comprises the following components: 55 parts of adhesive C, 21 parts of filler, 15 parts of heat absorber, 2.1 parts of dispersant, 2.5 parts of thixotropic agent, and 10 parts of diluent; adhesive C is phenolic resin; the heat absorber is calcium stearate; the filler is bentonite; the dispersant is polyether-modified trisiloxane; the thixotropic agent is hydrogenated castor oil; and the diluent is water.

[0078] The preparation method of planting sand particles includes the following steps:

[0079] Step (a): Cyclone the abrasive powder to obtain a spare powder with an average particle size of less than 10 μm; the abrasive powder is a mixture of zirconium oxide powder and diamond powder in a 1:1 weight ratio.

[0080] Step (b): By weight, add 1 part of the spare powder to 1-2 parts of water, add 0.02 parts of silane coupling agent K550, mix and grind in a sand mill for 40 minutes, dehydrate, dry, and then add to 0.5 parts of binder. After homogenization, obtain the granular slurry; the binder is a ceramic binder.

[0081] Step (c): Inject the granular slurry into the mold, treat it under vacuum for 4 minutes, add slurry, heat and cure it at 120℃ for 4 hours, demold to obtain 0.9mm sand-planting particles with a single particle strength of 38N;

[0082] Step (4) Curing: The semi-finished product is heated and cured at 90°C for 20 hours to obtain a new type of abrasive grinding and polishing material.

[0083] Comparative Example 1

[0084] It is a commercially available polymer abrasive polishing material.

[0085] Comparative Example 2

[0086] The difference from Example 1 is that the shape of the planting sand particles is not limited, and they are mostly irregular particles.

[0087] Comparative Example 3

[0088] The difference from Example 1 is that the base material was not impregnated.

[0089] Comparative Example 4

[0090] The difference from Example 1 is that no backing layer was made.

[0091] Comparative Example 5

[0092] The difference from Example 1 is that no thixotropic agent was added to the unre-coated adhesive.

[0093] Comparative Example 6

[0094] The difference from Example 1 is that in step (3), the sand distribution is 1100 g / m³. 2 .

[0095] Comparative Example 7

[0096] The difference from Example 1 is that in step (2), the thickness of the primer coating is 200 μm.

[0097] Comparative Example 8

[0098] The difference from Example 1 is that in step (2), the thickness of the primer coating is 20 μm.

[0099] Comparative Example 9

[0100] The difference from Example 1 is that in step (3), the adhesive coating is applied at a rate of 1200 g / m². 2 .

[0101] Comparative Example 10

[0102] The difference from Example 1 is that in step (a), the abrasive powder was not cycloned.

[0103] Performance testing:

[0104] Grinding belts were prepared using the novel abrasive grinding and polishing materials prepared according to Examples 1-3 and Comparative Examples 1-10, and SUS-304 was ground using these belts. A hard polyester carrier was selected as the carrier for the grinding belt, and the belt dimensions were 150mm × 2500mm. Grinding was performed at a cutting speed (Vc) of 30m / s and a feed rate (Vf) of 2-3m / min, for a grinding time of 5min / cycle, with 10 cycles. The single-cycle grinding amount δM / g, surface roughness Ra / μm, and surface spalling (δm / g, characterized by the mass difference of the grinding material before and after grinding) were measured and recorded. The test results are shown in Table 1.

[0105]

[0106]

[0107] As can be seen from the data of Examples 1-3 and Comparative Examples 1-10, the abrasive grinding material of Examples 1-3 has a smaller single grinding amount decay, that is, it is sharper and more stable, the roughness is basically a stable value, the amount of surface shedding is less, and the life is longer.

[0108] As can be seen from Comparative Example 1, commercially available polymeric abrasive polishing materials have good polishing effects in the early stage, but the amount of material removed decreases significantly in the later stage, the roughness gradually decreases, and the amount of surface shedding increases first and then decreases. The overall performance is not as good as that of Examples 1-3.

[0109] Comparative Example 2 did not specify the type of sand particles used, resulting in a large number of irregular particles. Compared to Example 1, although the single grinding depth was large in the first grinding test, the attenuation rate was rapid, leading to significant surface detachment. This may be due to the uneven shape and size of the surface particles, resulting in an imbalance of surface forces. This also reflects the rationality of the frustum shape in this design.

[0110] Comparative Example 3 did not undergo impregnation treatment of the base material, resulting in insufficient substrate strength and weak adhesion to the base adhesive and backing layer, ultimately leading to its breakage during the test. Comparative Example 4 did not have a backing layer, and similarly suffered from insufficient substrate strength, ultimately failing to complete 10 tests.

[0111] Comparative Example 5 did not contain a thixotropic agent, which led to re-penetration into the sand particles, making the grinding performance unstable.

[0112] Comparative Example 6 had an excessively high density of sand particles, which resulted in lower surface roughness and less grinding amount per pass. After the 5th test, the amount of sand particles that fell off decreased, and the amount of grinding amount per pass decreased more slowly, but the overall performance was not as good as that of Examples 1-3.

[0113] Compared with Example 1, Comparative Example 7 had an excessively thick base adhesive, which caused the surface roughness to decrease after the third test, resulting in an accelerated decrease in the amount of material removed per grinding cycle. Compared with Example 1, Comparative Example 8 had an excessively thin base adhesive, which caused the sand particles to fall off easily, thus failing to complete the test. Comparative Example 9 was similar to Comparative Example 7, with the same low surface roughness leading to a smaller amount of material removed per grinding cycle.

[0114] Comparative Example 10 did not perform a cyclone test, meaning that coarse particles in the abrasive powder were not controlled. During the 3rd to 5th tests, many of the sand particles broke, and the tests could not be completed.

Claims

1. A method for preparing a novel abrasive grinding and polishing material, characterized in that, Includes the following steps: Step (1) Impregnation and back coating: Immerse the substrate in the adhesive, dry it at 130℃-180℃, and after drying, apply a 30μm-100μm back base layer to one side of the substrate with a back base slurry to obtain a pretreated substrate; the adhesive is one or more of polyimide resin, polyurethane resin or acrylic resin. Step (2) Primer coating: Apply a primer with a thickness of 40μm-150μm to the side of the pretreated substrate away from the backing layer, and dry it at 70℃-140℃ for 70min-150min to obtain the coated substrate. Step (3) Sand application: Apply sand evenly to the base coat side of the adhesive substrate. The sand particles are truncated pyramidal in shape, with a size of 0.6mm-2.2mm, and are distributed at a rate of 400g-1000g per square meter. Then apply a layer of top coat adhesive, with a top coat application rate of 550g / m². 2 -1100 g / m 2 Dry at 70℃-140℃ for 70-150 minutes to obtain a semi-finished product; Step (4) Curing: The semi-finished product is heated and cured at 70℃-160℃ for 6h-24h to obtain a new type of abrasive grinding and polishing material. The substrate is one of heavy-duty paper, mesh cloth, or film substrate; In step (3), the method for preparing the planting sand particles includes the following steps: Step (a): Cyclone the abrasive powder to obtain spare powder with an average particle size of less than 10 μm; Step (b): By weight, add 1 part of spare powder to 1-2 parts of water, add 0.01-0.03 parts of silane coupling agent, grind in a sand mill for 30-60 minutes, dehydrate, dry, and then add to 0.3-0.5 parts of binder. After homogenization, obtain granular slurry. Step (c): Inject the granular slurry into the mold, treat it under vacuum for 3-5 minutes, add slurry, heat and cure it at 70℃-160℃ for 3-5 hours, and demold to obtain sand-planted granules.

2. The preparation method of the novel abrasive grinding and polishing material as described in claim 1, characterized in that, In step (1), the backing slurry includes the following components: by weight, 40-100 parts of adhesive A, 5-10 parts of thickener, 0.1-2.0 parts of wetting agent, 5-10 parts of anti-slip agent and 0-20 parts of diluent.

3. The preparation method of the novel abrasive grinding and polishing material as described in claim 2, characterized in that, The adhesive A is one or more of polyimide resin, polyurethane resin, or acrylic resin; the thickener is one or more of methylcellulose, hydroxypropyl methylcellulose, sodium carboxymethylcellulose, or hydroxyethylcellulose; the wetting agent is one of dehydrated sorbitan fatty acid, polyoxyethylene alkylphenol ether, or polyoxyethylene fatty alcohol ether; the antislip agent is one of calcium carbonate, kaolin, or silica; and the diluent is water.

4. The preparation method of the novel abrasive grinding and polishing material as described in claim 1, characterized in that, In step (2), the base adhesive comprises the following components: by weight, 30-90 parts of adhesive B, 10-40 parts of filler, 0.1-2.0 parts of leveling agent, 0.1-2.0 parts of coupling agent, and 0-40 parts of diluent.

5. The preparation method of the novel abrasive grinding and polishing material as described in claim 4, characterized in that, The adhesive B comprises the following components: by weight, 10-20 parts epoxy resin or phenolic resin, 1-3 parts polyurethane resin or acrylic resin; the filler is one or more of wollastonite, calcium carbonate, and calcium sulfate; the leveling agent is one of polyether-modified dimethyl polysiloxane, polyester-modified polydimethyl siloxane, or polyester-modified organosilicon; the coupling agent is one of silane coupling agents KH550 and KH560; and the diluent is one or a mixture of water, ethanol, tetrahydrofuran, and ethylene glycol ether.

6. The preparation method of the novel abrasive grinding and polishing material as described in claim 1, characterized in that, The abrasive powder in step (a) is one or more of zirconium oxide powder, silicon carbide powder, alumina powder, and diamond powder; in step (b), the binder is a ceramic binder or a phenolic resin binder.

7. A novel abrasive grinding and polishing material prepared by the preparation method of the novel abrasive grinding and polishing material as described in any one of claims 1-6.

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