WO2017126815A1 - Grinding article having protrusions and recesses, and method of manufacturing same - Google Patents

Abstract

The present invention relates to a grinding article having protrusions and recesses, and a method of manufacturing same. The present invention can manufacture a grinding article through a simple process by, immediately after depositing a slurry composition including grinding particles on a back sheet, using a tool having a certain pattern to form a pattern (protrusions and recesses) through a stamping technique, and then hardening same. In addition, because the grinding article manufactured by the manufacturing method according to the present invention has three-dimensional protrusions and recesses having a wide surface area and formed through the stamping technique, the grinding article may have excellent grinding ability.

Description

Abrasive article having irregularities and manufacturing method thereof

The present invention relates to an abrasive article having irregularities and a manufacturing method thereof.

Abrasives are used to polish and finish the surface of various workpieces such as metal, glass, plastic, leather, rubber, fiber, wood, etc., and make and size coating on the surface of the substrate, such as the back sheet. It is prepared by attaching the abrasive grain (grain) by a method such as coating (). In the case of an abrasive article manufactured by such a conventional method, the workpiece is polished while the abrasive particles are in direct contact with the surface of the workpiece. Initially, a relatively small number of surface abrasive particles in the active abrasive zone contact with the workpiece and the surface wears off. Although the number increases, some abrasive particles may be dulling depending on the surface area of the workpiece, the number of times of polishing, and the like, thereby decreasing the usefulness.

Conventional abrasive articles are mostly coated with a single layer or two layers of abrasive particles, the grinding force is determined according to the size, shape, coating amount of the abrasive particles. In particular, the abrasive article having the above structure has a disadvantage in that the grinding force is sharply reduced when the abrasive grain is coated or coated, that is, the initial grinding force is high but the coated abrasive particle is worn or dropped. In order to solve this problem, an abrasive article, or a manufacturing method thereof, has been known in which abrasive particles are stacked in multiple layers to increase the coating amount of abrasive particles.

For example, Korean Patent Laid-Open Publication No. 10-1996-0703365 discloses an abrasive article having a plurality of abrasive aggregates in the form of three-dimensional dots on the surface of a substrate, and US Patent No. 5,014,468 uses a rotor gravure applicator. A polishing article is disclosed in which a composition comprising abrasive grains is coated on a surface of a base material with irregularities in a ring form. Although these patents have achieved considerable results in certain fields, they suffer from low productivity due to complex production methods. In addition, the dot-shaped abrasive article should compensate for the disadvantage by adding a spray coating to compensate for the low initial grinding force. In the case of using the rotor gravure machine, when the composition is incompletely peeled from the mold, an uneven shape of the uneven shape, for example, volcanic shape with a crater instead of pyramidal shape, results in an initial grinding force and a grinding surface. This can be uneven.

In order to solve this problem, as a method of forming a pattern after providing flexibility in a mold separation process, various methods of manufacturing an abrasive article by performing a subsequent process after partially curing the composition applied to the substrate surface have been introduced. For example, US Pat. No. 5,833,724 discloses a method of manufacturing an abrasive article by forming a pattern after imparting flexibility to a composition applied to a substrate surface. However, this method has a problem that not only the additional flexibility provision step must be performed during the manufacturing process, but also the process cost increases. In addition, the adhesives that can be used may be limited because of the need to impart flexibility, and the flexibility and patterning pressures cause the abrasive particles in the composition to settle and sink during the process, resulting in wear of the composition when used in actual grinding operations. There is a problem in that the abrasive particles have a relatively low grinding force until they protrude.

Accordingly, the present inventors have found that an abrasive article having excellent grinding force can be manufactured in a simple process without the flexibility provision step, and completed the present invention.

Accordingly, it is an object of the present invention to provide a method for producing an abrasive article that can be manufactured in a simple process and an abrasive article having irregularities which is excellent in the grinding force produced therefrom.

In accordance with the above object, the present invention

(a) applying to and attaching a slurry composition comprising abrasive particles and an adhesive to one surface of the back sheet by a continuous or patterned coating method;

(b) before the slurry composition is cured, pressing the patterning tool onto the slurry composition attached to the backsheet, and then peeling it off to form irregularities; And

(c) it provides a method for producing an abrasive article, comprising the step of curing or drying the slurry composition is formed irregularities.

According to the above another object, the present invention

(a) adhering a pattern tool having voids to one side of the backsheet;

(b) applying a slurry composition comprising abrasive particles and an adhesive on the pattern tool in a continuous or patterned application manner and attaching the slurry composition to the pattern tool and the back sheet;

(c) forming irregularities in the slurry composition by lifting and separating the pattern tool from the backsheet before the slurry composition is cured; And

(d) providing a method for producing an abrasive article, comprising the step of curing or drying the slurry composition in which the irregularities are formed.

According to the above another object, the present invention

(A) backsheet; And

(B) an abrasive article formed on one side of the back sheet and comprising an abrasive layer having a plurality of irregularities,

The irregularities have a polygonal pyramid or conical shape, but has a sharp vertex having a curved line having a larger tangential slope than a straight bus bar, to provide an abrasive article.

According to the present invention, an abrasive article may be manufactured by a simple process of forming a pattern (concave-convex) by dipping using a tool having a specific pattern immediately after applying a slurry composition including abrasive particles to a back sheet. In addition, the abrasive article manufactured by the manufacturing method according to the present invention can have excellent grinding force by having a three-dimensional unevenness having a large surface area by the dipping method. Furthermore, there is an advantage in that a variety of kinds of adhesives that can be used are unnecessary because the process of providing flexibility is unnecessary.

1 is a cross-sectional view of an abrasive article according to an embodiment of the present invention.

Figure 2 is a schematic diagram showing step by step a method for producing an abrasive article according to an embodiment of the present invention.

Figure 3 is a schematic diagram showing step by step a method for manufacturing an abrasive article according to another embodiment of the present invention.

4A and 4B are photographs showing an example of a pattern tool used in manufacturing an abrasive article according to the present invention.

5A is an abrasive article manufactured using the pattern tool of FIG. 4A, and FIG. 5B is an enlarged photograph thereof.

6A is a graph showing a CUSP shape of the unevenness of the present invention represented by Equation 1, and 6b and 6c are graphs showing the unevenness out of the scope of the present invention.

FIG. 7 is a graph illustrating the amount of abrasive loss measured by performing dry grinding with the abrasive article prepared in Example 1 and Comparative Examples 1 to 4. FIG.

8 is a graph measuring the amount of abrasive wear by performing wet grinding with P240 using the abrasive article prepared in Example 2 and Comparative Examples 5 and 6. FIG.

9 is a graph measuring the amount of abrasive loss by performing wet grinding with P320 using the abrasive articles prepared in Example 3 and Comparative Example 7. FIG.

Hereinafter, the present invention will be described in more detail.

The present invention, (a) applying a slurry composition comprising abrasive particles and an adhesive to one side of the back sheet by applying a continuous or patterned coating method, (b) before the slurry composition is cured, the back It provides a method for producing an abrasive article comprising the step of pressing the pattern tool to the slurry composition attached to the sheet and then peeled off to form the irregularities, and (c) curing or drying the slurry composition on which the irregularities are formed.

Specifically, the manufacturing method according to an embodiment of the present invention includes the step of (a) applying to one side of the back sheet, a slurry composition comprising abrasive particles and an adhesive by applying a continuous or patterned coating method. .

The slurry composition is a thixotropic composite in which irregularities may be formed by a pattern tool, and may include abrasive particles and an adhesive, and may further include fillers and diluents, and may be prepared by mixing these components. . It is very important that the slurry composition has a rheological property such that sedimentation of the abrasive particles does not occur well while coating well, and that the shape of the unevenness can be maintained until the hardening reaction is completed while the shape change by the pattern tool is easy. .

The abrasive particles are aluminum oxide, silica, silicon carbide, boron carbide, titanium carbide, alumina zirconia, diamond, ceria, cubic boron nitride, boron oxide, garnet, diatomaceous earth, boron carbonitride, sintered alpha alumina, sintered alumina or It may be a mixture thereof, but is not limited thereto. Specifically, the aluminum oxide may be white molten aluminum oxide, brown molten aluminum oxide, molten aluminum oxide such as monocrystalline molten aluminum oxide, ceramic aluminum oxide, heat treated aluminum oxide, or the like. The abrasive particles may be used in an amount of 15% by weight to 85% by weight, specifically, in an amount of 30% by weight to 60% by weight based on the total weight of the slurry composition. In addition, the abrasive particles may have an average particle diameter of 500㎛ to 0.5㎛, specifically 300㎛ to 2㎛.

The adhesive may be an ultraviolet curable resin such as polyester acrylate, epoxy acrylate, urethane acrylate; Thermosetting resins such as phenol resins, epoxy resins, melamine resins, urea resins, urea melamine copolymer resins, urethane resins, unsaturated polyester resins; Thermoplastic resins such as vinyl acetate resin, polyvinyl alcohol resin, vinyl chloride resin, polyvinyl acetal resin, acrylic resin, saturated polyester resin, polyamide resin and polyethylene resin; Protein-based adhesives; Starch-based adhesives; Resin adhesives such as rosin; Inorganic adhesives such as cements, silicates, and ceramics; Or a mixture thereof, but is not limited thereto. The adhesive may be included in an amount of 10 to 60% by weight, and specifically, in an amount of 15 to 40% by weight, based on the total weight of the slurry composition.

The filler may be calcium carbonate, clay, SiO ₂ , pumice, feldspar, cryolite, potassium tetrafluoroborate (KBF ₄ ) or mixtures thereof, the total weight of the slurry composition It may be included in an amount of 0 to 50% by weight relative to.

The diluent may be water, an organic solvent or a mixture thereof, and specifically, water; Propylene glycol methyl ether (PM), isopropyl alcohol (IPA), methyl alcohol; Or mixtures thereof. The slurry composition may have a viscosity of 1,000 to 60,000 cps at 25 ° C., and in detail, may have a viscosity of 10,000 to 30,000 cps. In addition, the slurry composition may have a solid content of 60 to 100% by weight, and in detail, may have a solid content of 70 to 85% by weight.

In addition to this, the slurry composition may further include additives such as a coupling agent, a dispersant, a fluidity regulator, an antifoaming agent, a photoinitiator, and the like, and each of the above components may be ones commonly used in the art.

The slurry composition may be a comma coating, a rotary screen coating, a screen coating, a knife coating, a roll coating, a spray coating, a reverse coating, a gravure coating, a transfer coating, a vacuum die coating, a die coating, or a combination thereof, in which one side of the back sheet is coated. It can be applied to a predetermined thickness. Specifically, the slurry composition may be applied in a continuous or patterned manner. The patterned coating method may include both a regular pattern or a random pattern coating method. The slurry composition may be applied in an amount of 100 to 3,000 g / m ² , and in detail, may be applied in an amount of 300 to 1,500 g / m ² .

Furthermore, the manufacturing method according to an embodiment of the present invention includes the step of (b) pressing the patterning tool on the slurry composition attached to the back sheet and then removing the slurry composition to cure before the slurry composition is cured.

Concave-convex may be formed with respect to the slurry composition applied to the back sheet by using a pattern tool such as a roll or sheet having an intaglio or embossed concave-convex, or a roll or sheet having a hole. The pattern tool may be a three-dimensional structure that is shaped by intersecting the intaglio portion having voids and the embossed portion retaining airtightness, and the shape and dimensions of such a pattern may be appropriately selected as necessary. Such a pattern may shape a honeycomb shape, may shape a mesh network structure, or may shape shaped points. For example, the pattern tool may be a screen roll or sheet, a roll or sheet in which the pattern is engraved or embossed, a brush roll or sheet, or the like. The pattern tool having the pores may have pores having a diameter of 500 to 4000 μm, and the pores may have various shapes such as conical, semi-circular, cylindrical, rectangular, hexagonal, and the like. It may have a form.

The formation of the three-dimensional structure of the concave-convex according to the present invention utilizes a method of imprinting a pattern tool on the abrasive particle-containing slurry composition before curing. Specifically, when the pattern tool is pressed on the abrasive particle-containing slurry composition applied to the back sheet in parallel with one side of the back sheet, wetting occurs in the slurry composition in contact with the embossed portion of the pattern tool, and the pattern tool is applied. When lifted out, the slurry composition in contact with the embossed portion of the pattern tool is lifted up by the viscosity of the slurry composition, and the slurry composition which is not in contact with the pattern tool is naturally lowered by the raised slurry composition. . In this way, the three-dimensional structure of the irregularities is naturally formed in the abrasive layer when the pattern tool is completely removed, and the raised upper part has a large surface area and volatilizes as the solvent (diluent) of the abrasive layer rapidly volatilizes, causing irregularities. Among them, the abrasive grains protrude.

In addition, the manufacturing method according to an embodiment of the present invention includes the step (c) curing or drying the slurry composition is formed.

The slurry composition having three-dimensional unevenness formed on the backsheet may be cured by polymerization or condensation of the resin by thermal energy or radiation energy, or may simply be dried. The amount of energy used for the curing may vary depending on the amount of the slurry composition, the type and amount of abrasive particles, the type and amount of the additive, and the like. Hot air drying may be about 30 to 150 ℃, the exposure time may be 5 minutes to 24 hours or more. The radiation energy may be an electron beam, ultraviolet light, visible light, or the like. In the case of an electron beam, an energy level of about 0.1 to about 10 Mrad may be used, in the case of ultraviolet light, a wavelength in the range of about 200 to about 400 nm may be used, and in the case of visible light, a wavelength in the range of about 400 to about 800 nm may be used.

The abrasive article cured by the above process may be finally cured at 100 to 120 ℃ for 6 to 10 hours.

Flexibility may be provided by additionally performing a single flex or double flex process on the final cured abrasive article. The abrasive article produced may be converted into any desired form such as belts, sheets, discs, etc. prior to use.

The method of manufacturing the abrasive article as described above is shown in the schematic diagram in FIG. 2. Referring to FIG. 2 in sequence, (a) to (c) show that the abrasive grain-containing slurry composition 22 is applied to the back sheet 21 to a predetermined thickness, and then the pattern tool 23 is pressed to take out. It was. (d) shows that a portion 24 that is not in contact with the portion 25 that is in contact between the pattern tool 23 and the slurry composition 22 occurs, and (e) then lifts the pattern tool 23. In the process of removing and removing, the contacting portion 25 is raised along the pattern tool 23 and the non-contacting portion 24 is relatively lowered, indicating that unevenness is formed. 2 (f) shows the shape of the irregularities formed in the abrasive article in a state in which the pattern tool 23 is completely separated, and the vertical cross section of the irregularities may have a triangular shape having a concave curved busbar.

The present invention also provides a method for producing an abrasive article by a method according to another embodiment as follows.

The present invention, (a) in close contact with the pattern tool having a void on one side of the back sheet, (b) on the pattern tool, a slurry composition comprising abrasive particles and an adhesive on a continuous or patterned coating method Applying and adhering to the pattern tool and the backsheet, (c) before the slurry composition is cured, forming irregularities in the slurry composition by lifting and separating the pattern tool from the backsheet, and (d) a slurry having irregularities formed thereon. It provides a method for producing an abrasive article, comprising the step of curing or drying the composition.

Specifically, the manufacturing method according to another embodiment of the present invention, the one described above, except that the step of adhering the pattern tool having voids to one surface of the backsheet is carried out before the slurry composition applying step An abrasive article having irregularities can be produced using the same dipping method as the manufacturing method according to the embodiment.

The manufacturing method of the above-mentioned abrasive article is shown in the schematic diagram in FIG. Referring to FIG. 3 in sequence, (a) illustrates the step of bringing the pattern tool 33 having the voids into the backsheet 31. (b) and (c) indicated that the slurry composition 32 was applied to the backsheet 31 and the pattern tool 33 to a predetermined thickness, and then (d) lifted the pattern tool 23 and In the separating process, the contacting part 35 is raised along the pattern tool 33 and the non-contacting part 34 is relatively lowered to show that the unevenness is formed. 3 (e) shows the shape of the unevenness formed in the abrasive article in a state where the pattern tool 33 is completely separated, and the vertical cross section of the unevenness may have a triangular shape having a concave curved busbar.

In addition, the present invention (A) the back sheet; And (B) an abrasive article formed on one surface of the backsheet and having a plurality of irregularities, wherein the irregularities have a polygonal pyramid or a conical shape, and the curved line has a larger tangential slope than a linear bus bar. An abrasive article having a sharp edge having a busbar of is provided. In detail, the irregularities of the abrasive article may have a vertical cross section having a triangular shape, and may have a triangular shape in which two sides constituting the sharp vertex are concave.

A cross-sectional view of an abrasive article according to an embodiment of the present invention is shown in FIG. 1 (10: abrasive article, 11: back sheet, 12: abrasive layer).

Specifically, the irregularities may have a polygonal pyramidal shape or a conical shape in which the mother wire is concave, and in particular, may have a CUSP shape represented by Equation 1 below:

[Equation 1]

F (x) = -a┃X┃ ^{(b / c)}

Where

a, b, and c are each independently a nonzero real number,

b / c is a real number greater than 0 and less than 1.

For example, a, b and c are respectively shown in Table 1 below, and b <c corresponding to the present invention is shown in FIG. 6a, b> c and b = c which deviate from the scope of the present invention. Are graphically represented in FIGS. 6B and 6C, respectively. The shape of the graph may indicate the shape of the unevenness.

The unevenness may have a larger surface area and smaller volume than the polygonal pyramid or cone of the straight bus bar, and may have a surface area of 102 to 130% and a volume of 77 to 98%. In addition, the height of the unevenness may be 0.1 to 2.0mm, the interval between the vertices of the unevenness may be 0.2 to 5mm.

Hereinafter, examples and the like will be described in detail to help the understanding of the present invention. However, embodiments according to the present invention can be modified in many different forms, the scope of the invention should not be construed as limited to the following examples.

Example 1

Preparation of Slurry Composition

Phenolic resin (HP-41, Gangnam Hwaseong) 22% by weight, potassium tetrafluoroborate (KBF ₄ , SOLVAY) 22% by weight, heat-treated aluminum oxide (BFRPL P120, Treibacher, average particle diameter 160㎛) 52% by weight , BYK-420 (BYK-Chemi) 3% by weight, Airosol-OT (Cytec) 0.5% by weight and LDC-120A (Dowcorning) 0.5% by weight of water, a viscosity of 7,500cps (25 ℃) and A slurry composition of 80% by weight solids was obtained.

Manufacture of abrasive articles

The slurry composition was coated on a 350 g / m² surface treated back sheet (THS310636-030, Suntec Industries Co., Ltd.) at a weight of 620 g / m² per unit area by using a COMMA COATING equipment, and a comma coating equipment immediately. Using a rotary screen coater located immediately after, the flowable slurry composition coated on the backsheet was continuously taken with a screen having a hole diameter of 900 μm × hole spacing 700 μm × thickness 220 μm, to form irregularities. . Then, the back sheet coated with the slurry composition having the unevenness was dried at 100 ° C. for 20 minutes and 120 minutes at 40 ° C., and subjected to a single flex, followed by curing at 120 ° C. for 5 hours to obtain an abrasive article having unevenness. Prepared.

Example 2

Preparation of Slurry Composition

Phenolic resin (HP-41, Gangnam Hwaseong) 24% by weight, calcium carbonate (CaCO ₃ , Onoda) 17% by weight, heat treated aluminum oxide (BFRPL P240, Treibacher, average particle size 80㎛) 55% by weight, BYK- 3% by weight of 420 (BYK-Chemi), 0.5% by weight of Airosol-OT (Cytec) and 0.5% by weight of LDC-120A (Dowcorning) were mixed in 12 g of water, having a viscosity of 9,000 cps (25 ° C) and a solid content of 79 weight A slurry composition of% was obtained.

Manufacture of abrasive articles

The slurry composition was coated and coated at a weight of 1,300 g / m² per unit area on a surface treated back sheet (THS310636-030, Suntec Industries Co., Ltd.) of 600 g / m² using a COMMA COATING equipment. Using a rotary screen coating machine located immediately after the equipment, the slurry composition was continuously photographed with a screen having a hole diameter of 1,900 μm x hole spacing of 1,000 μm x thickness of 300 μm before being cured to form irregularities. Then, the back sheet coated with the slurry composition having the unevenness was dried at 100 ° C. for 20 minutes and 120 minutes at 40 ° C., and subjected to a single flex, followed by curing at 120 ° C. for 5 hours to obtain an abrasive article having unevenness. Prepared.

Example 3

Preparation of Slurry Composition

Phenolic resin (HP-41, Gangnam Hwaseong) 24% by weight, calcium carbonate (CaCO ₃ , Onoda) 17% by weight, heat treated aluminum oxide (BFRPL P320, Treibacher, average particle diameter: 65㎛) 55% by weight, BYK- 3% by weight of 420 (BYK-Chemi), 0.5% by weight of Airosol-OT (Cytec) and 0.5% by weight of LDC-120A (Dowcorning) were mixed in 11 g of water, having a viscosity of 8,500 cps (25 ° C) and 80 weight of solids. A slurry composition of% was obtained.

Manufacture of abrasive articles

Except for using the slurry composition, an abrasive article was prepared in the same manner as in Example 2.

Comparative example  One

Preparation of Slurry Composition

Phenolic resin (HP-41, Gangnam Hwaseong) 20% by weight, calcium carbonate (CaCO ₃ , Onoda) 18% by weight, cryolite (Cryolite, SOLVAY) 8% by weight, heat-treated aluminum oxide (BFRPL P120, Treibacher, 50 micrometers (average particle diameter) 50 weight%, BYK-420 (BYK-Chemi company) 3 weight%, 0.5 weight% of Airosol-OT (Cytec company) and 0.5 weight% of LDC-120A (Dowcorning company) are mixed with 1 g of water, A slurry composition having a viscosity of 55,000 cps (25 ° C.) and a solid content of 91 wt% was obtained.

Manufacture of abrasive articles

Injecting the slurry composition into the rotary screen, using a knife coating equipment to squeeze the inside of the screen, 350 g / m² surface-treated back sheet (THS310636-030, Suntec Industries Co., Ltd.) 620g / m² per unit area Coated by weight. Thereafter, the slurry composition was subjected to dot coating using a screen apparatus having a hole diameter of 1,900 μm x hole spacing of 1,000 μm and a thickness of 300 μm, and dried at 100 ° C. for 20 minutes and 120 ° C. for 40 minutes, and then 120 ° C. The final cured at 5 hours to prepare an abrasive article.

Comparative example  2

Preparation of Slurry Composition

The slurry composition of Comparative Example 1 was used.

Manufacture of abrasive articles

An abrasive article was manufactured in the same manner as in Comparative Example 1, except that screen equipment having a hole diameter of 900 μm × hole spacing 700 μm × thickness 220 μm was used.

Comparative example  3

Preparation of Slurry Composition

Phenolic resin (HP-41, Gangnam Hwaseong) 17% by weight, calcium carbonate (CaCO ₃ , Onoda) 21% by weight, cryolite (Cryolite, SOLVAY) 8% by weight, heat-treated aluminum oxide (BFRPL P120, Treibacher, 50 wt% of an average particle diameter of 65 μm, 3 wt% of BYK-420 (BYK-Chemi), 0.5 wt% of Airosol-OT (Cytec) and 0.5 wt% of LDC-120A (Dowcorning), were mixed with 4 g of water. A slurry composition having a viscosity of 40,000 cps (25 ° C.) and a solid content of 91 wt% was obtained.

Manufacture of abrasive articles

Injecting the slurry composition into the rotary screen, using a knife coating equipment to squeeze the inside of the screen, 350g / m² surface-treated back sheet (THS310636-030, Suntec Industries Co., Ltd.) 620g / m² per unit area The coating was carried out by weight. Thereafter, the slurry composition was subjected to dot coating using a screen apparatus having a hole diameter of 1,900 μm x hole spacing of 1,000 μm and a thickness of 300 μm, and dried at 100 ° C. for 20 minutes and 120 ° C. for 40 minutes, and then 120 ° C. The final cured at 5 hours to prepare an abrasive article.

Comparative example  4

Solar Grinding Co., Ltd. used the product sold as 'R192 P120'.

Comparative Example 5

The compact grain product sold as VK "KK779X P240" was used.

Comparative Example 6

A compact grain product sold as VK "KK718X P240" was used.

Comparative Example 7

A compact grain product sold as VK "KK779X P320" was used.

Test Example

Test Example 1 Grinding Force Measurement

For the abrasive articles of the above Examples and Comparative Examples, grinding experiments were conducted using a centerless grinding machine.

Specifically, a pipe available as 'stainless steel 304' having a diameter of 32 mm and a length of 50 cm was used as the grinding material, and 12 pipes (one set) were ground three times in three sets. Dry grinding was performed for the abrasive articles of Examples 1 and Comparative Examples 1 to 4, and wet grinding was performed for the abrasive articles of Examples 2 to 3 and Comparative Examples 5 to 7. Grinding was terminated when the abrasive layer of the abrasive article was all worn out and the backsheet surface was exposed, and the average of the three sets of removal of the abrasive (stock removal, g) is shown in Table 3 below. In addition, the graph of the abrasive loss amount of Example 1, and Comparative Examples 1 to 4 subjected to dry grinding, the graph of the abrasive loss amount of Example 2, and Comparative Examples 5 and 6 subjected to wet grinding with P240 in FIG. 8 is a graph showing the amount of abrasive wear of Example 3 and Comparative Example 7 subjected to wet grinding using P320 in FIG. 9.

In dry grinding, the grinding belt rotates at the belt rotation speed of 1700m / min, the grinding speed progresses at 25m / min, and the grinding belt backup wheel is 350mm land and groove coated with 60 ° hardness rubber. Polishing was performed using wheels intersected at 20:20 size. The test product manufactured for the test was processed with a belt of 60mm width and 2100mm length, respectively, and the joints of the belt were manufactured by seaming with tape.

In the wet grinding, the polishing belt rotates at a belt rotation speed of 1200 m / min, the moving speed of the grinding material proceeds at 25 m / min, and the polishing belt backup wheel was polished using the same wheel as dry. For testing, a polishing belt was manufactured in the same manner as dry.

Test Example 2: Grinding Surface Roughness Measurement

For the abrasive articles of the above examples and comparative examples, after measuring five times Ra, Ry and Rz of the grinding surface using a surface roughness measuring instrument (SJ-301, Mitutoyo Co., Ltd.), the maximum and minimum values were discarded and the remaining three times were averaged. The value is shown.

Looking at the Table 3, the abrasive article prepared in Example showed significantly superior grinding power in both dry and wet polishing compared to the abrasive article of the comparative example.

[Description of the code]

10: abrasive article

12: abrasive layer

11, 21, 31: back sheet

22, 32: abrasive grain-containing slurry composition

23, 33: Pattern Tool

24, 34: portion of the slurry composition that does not contact the pattern tool

25, 35: portion of the slurry composition in contact with the pattern tool

Claims (18)

1. (a) applying to and attaching a slurry composition comprising abrasive particles and an adhesive to one surface of the back sheet by a continuous or patterned coating method;

   (b) before the slurry composition is cured, pressing the patterning tool onto the slurry composition attached to the backsheet, and then peeling it off to form irregularities; And

   (c) curing or drying the slurry composition in which the unevenness is formed.
2. (a) adhering a pattern tool having voids to one side of the backsheet;

   (b) applying a slurry composition comprising abrasive particles and an adhesive on the pattern tool in a continuous or patterned application manner and attaching the slurry composition to the pattern tool and the back sheet;

   (c) forming irregularities in the slurry composition by lifting and separating the pattern tool from the backsheet before the slurry composition is cured; And

   (d) hardening or drying the slurry composition in which the unevenness is formed.
3. The method according to claim 1 or 2,

   The slurry composition is a thixotropic composite further comprising a filler and a diluent, characterized in that the abrasive article manufacturing method.
4. The method according to claim 1 or 2,

   The abrasive particles are aluminum oxide, silica, silicon carbide, boron carbide, titanium carbide, alumina zirconia, diamond, ceria, cubic boron nitride, boron oxide, garnet, diatomaceous earth, boron carbonitride, sintered alpha alumina, sintered alumina or It is a mixture of these, The manufacturing method of the abrasive article.
5. The method according to claim 1 or 2,

   A method for producing an abrasive article, characterized in that the abrasive particles have an average particle diameter of 500㎛ to 0.5㎛.
6. The method according to claim 1 or 2,

   The adhesive may be polyester acrylate, epoxy acrylate, urethane acrylate, phenol resin, epoxy resin, melamine resin, urea resin, urea melamine copolymer resin, urethane resin, unsaturated polyester resin, vinyl acetate resin, polyvinyl alcohol resin, Vinyl chloride resin, polyvinyl acetal resin, acrylic resin, saturated polyester resin, polyamide resin, polyethylene resin, protein adhesive, starch adhesive, rosin, cements, silicate soda, ceramics or mixtures thereof A method of producing an abrasive article.
7. The method according to claim 1 or 2,

   Abrasive article, characterized in that the coating method is a comma coating, rotary screen coating, screen coating, knife coating, roll coating, spray coating, reverse coating, gravure coating, transfer coating, vacuum die coating, die coating or a combination thereof Manufacturing method.
8. The method according to claim 1 or 2,

   The patterned coating method includes a regular pattern coating method or a random pattern coating method, characterized in that the abrasive article manufacturing method.
9. The method of claim 1,

   The method for producing an abrasive article, characterized in that the pattern tool is a roll or sheet having an intaglio or embossed unevenness, or a roll or sheet having an air gap.
10. The method according to claim 1 or 2,

    The slurry composition is characterized in that it has a viscosity of 1,000 to 60,000 cps at 25 ℃, manufacturing method of the abrasive article.
11. The method according to claim 1 or 2,

    The slurry composition is characterized in that having a solid content of 60 to 100% by weight, a method for producing an abrasive article.
12. The method according to claim 1 or 2,

    A method for producing an abrasive article, characterized in that the slurry composition is applied in an amount of 100 to 3,000 g / m ² .
13. (A) backsheet; And

    (B) an abrasive article formed on one surface of said back sheet and comprising an abrasive layer having a plurality of irregularities,

    The uneven article has a polygonal or conical shape, but has a sharp vertex having a curved line having a larger tangential slope than a straight bus bar, the sharp article.
14. The method of claim 13,

    The vertical cross section of the irregularities has a triangular shape, the two sides constituting the sharp vertex, the abrasive article.
15. The method of claim 13,

    An abrasive article, characterized in that the irregularities have a larger surface area and smaller volume than the polygonal cone or cone of the straight bus bar.
16. The method of claim 15,

    An abrasive article, characterized in that the irregularities have a surface area of 102 to 130% and a volume of 77 to 98% compared to the polygonal cone or cone.
17. The method of claim 13,

    An abrasive article, characterized in that the height of the unevenness is 0.1 to 2.0mm.
18. The method of claim 13,

    An abrasive article, characterized in that the interval between the vertices of the unevenness is 0.2 to 5 mm.

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