TW528659B - Anti-loading treatments - Google Patents

Abstract

An abrasive is oversized with a layer consisting essentially of an inorganic, anti-loading agent selected from the group consisting of metal silicates, silicas, metal carbonates, and metal sulfates. The metal silicates can be selected from the group consisting of magnesium silicates, potassium aluminum silicates, aluminum silicates, and calcium silicates. In one embodiment, the magnesium silicates include talc, the potassium aluminum silicates include micas, the aluminum silicates include clays, and the calcium silicates include wollastonite. The silicas can be selected from the group consisting of fused silica, fumed silica, and precipitated amorphous silica. The metal carbonates can include calcium carbonate. The metal sulfates can include hydrous calcium sulfate or anhydrous calcium sulfate.

Description

528659 A7

发明 景 Coated abrasives are used to sand a variety of types including soft and difficult to grind

(Hrush) and other substances, like lacquered surface. This is also a premature (―e) load during polishing, which makes the coated abrasive its maximum performance. The load-bearing system abrasives are combined with each other and blocked in the gap between the grinding and grinding. As a result, the grinding tool cannot continuously and efficiently grind the work treatment object or surface. When used in the grinding industry, I uses chemical compounds like i = (that is, zinc stearate, calcium stearate), coated into a seventeen, or added to a slzecoat, which generally means It is said that the tackiness technique ^ ^ The fatty acid technology provides sufficient removal of blocking and anti-loading properties, but the: Recognize that the metal stearates will leave some low surface energy slags: :: above, this is likely to cause Post-processing asks @, for example, incomplete coating. Standing Spear King Sequence Pollution caused by these low surface energy substances can be detected by measuring the water contact angle on the sand. —The practical way to solve this problem is to clean the sanded surface with a solvent wiper to make sure that all the contaminated materials are cleaned up 'or to stearic acid-free abstract of the invention = it will take considerable time and money' The lacquer application procedure eliminates the need to clean the sanded surface with a solvent swab. In her case, the abrasive such as coated abrasives or composite abrasives was added to the outer rubber with a thick layer consisting essentially of an inorganic anti-carrier, where the inorganic anti-carrier was selected from a metal silicate , Dioxin / Dagger 1,

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-4-, 28659 A7 _B7 V. Description of the invention (2) It belongs to the group consisting of carbonate and metal sulfate. This layer is basically composed of inorganic anti-supporting additives, and its sound means that the layer does not contain additives with organic wounds, such as the commonly used organic anti-supporting additives, including organic metal salts and organic scale salts. , Organic crushed acid, organic borate, and similar substances. In any case, it does not exclude the inclusion of a hardened cementitious component, which is a means to provide an inorganic carrier. The metal salt can be selected from the group consisting of magnesium salt, potassium aluminum silicate, calcium silicate, and calcium salt. In a specific embodiment, magnesium silicate includes talc, and potassium silicate includes mica. Inscriptions include clay, and siliceous dances include crushed limestone. Silicon dioxide can be selected from the group consisting of dissolving, fume, and precipitated amorphous silicon. Metal carbonates may include calcium carbonate. Metal sulfates can include aqueous calcium sulfate and anhydrous calcium sulfate. This anti-loading agent has a Mohs hardness value of less than about 7, and preferably, less than about 3. This anti-loading agent has particles having an average diameter of less than about 30 micrometers, and preferably, in the range of about 1 to about 20 micrometers. This allows the anti-loading agent to form particles small enough to be combined with abrasive debris from the sanded surface, such as a lacquered metal surface, which prevents the formation of a load of abrasive particles on the coated abrasive surface. That is, the particle size of the anti-carrier agent is such that when the coating surface is used to sand the lacquer-coated surface to produce abrasive wear debris, the anti-carrier agent particles will be released to prevent them from aggregating. size. In another embodiment, the concentration of the anti-carrier agent is mainly concentrated in an oversized layer. For example, the concentration may be at least 10% by volume of the outer rubber layer, preferably at least about 60% by volume.

528659 A7 B7

The rhenium carrier is preferably dispersed in a binder, and includes, for example, a thermoplastic or thermosetting resin. For example, the thermoplastic resin may include latex, and the thermosetting resin may be selected from the group consisting of enteric resin, phenol resin, epoxy resin, urethane, and radiation-curable resin series. An abrasive article such as a coated abrasive article or a composite abrasive article may also be provided, which includes a backing layer * having a first surface; an abrasive layer having a plurality of abrasive particles disposed on the first surface of the backing layer; and, A material layer consisting essentially of an inorganic anti-supporting agent disposed on the abrasive layer. In a specific embodiment, the ' anti-carrier is disposed on the hardened coated particles. The invention also provides a method for making an abrasive article such as a coated abrasive article or a composite abrasive article, which comprises adhering a plurality of abrasive particles on a first surface of a backing layer; The substance is arranged on the abrasive particles. Graphic brief

The text and other objects, features, and advantages of the present invention will become more apparent from the following description of a more specific preferred embodiment of the present invention. Coated abrasives typically include products that adhere abrasive particles to a supporting backing layer, which can be used to grind or wear away the surface of the article they are used in. The backing layer of the coated abrasive can be a rigid body, but in general, it is flexible and typically contains a material such as paper, clothing, fiber mats, polymeric films, vulcanized fibers, or the The composition of other materials and its paper size are applicable to the Chinese National Standard (CNS) A4 specification (210 X 297 mm) 528659 A7 B7 V. Analogous description of the invention. In some applications, the 'supporting backing layer initially includes concentrated fibers, and with or without the use of additional bonding materials' to add abrasive sand ^ to spread the grit throughout the abrasive web. If it does not contain the adhesive binder: it can compress the concentrated loose fibers and grit, or it can be fixed or hardened if it contains an adhesive, to form a coated abrasive. Abrasive grit can generally be any material that can grind the product. Typically, it contains grit, tunnel stone, diamond, metal oxides such as oxidized metal, aluminum zinc, aluminum ceramic, gold and diamond diamond, silicon carbide, Garnet, rouge, crocus, and the like. Tian's typical sand grains have less sharp edges to perform the grinding function. However, 1 sharp edges (quality and quantity depend on their use. Sand grains can be embedded or pulled into the supporting back layer +, but it is more typical It is adhered to the supporting back layer with a suitable adhesive material. The sand particles can be coated or bonded on the weaving web with a specific pattern, or randomly distributed. Typically, detailed measurements are used to Make sure that there are fixed sand particles on the coated abrasive, which have granular cutting edges properly distributed in one or more layers. The bonding material can usually be that the sand particles can be adhered to the support back layer and the grinding can not be prevented. Any suitable material with typical effect, typical bonding materials include phenolic resin, adhesive, varnish, epoxy resin, acrylate, multifunctional acrylate, urea resin, trifunctional urethane, polyurethane Parent ester resins, lacquers, glazes, and any of a variety of other materials that have the ability to firmly adhere grit to the April layer. Usually, the bonding material is carefully selected so that the coated abrasive can perform its function Great performance, to complete the grinding surface included. Careful selection of self-adhesive material, such as in the present paper is not suitable for Chinese National Standard Scale (CNS) A4 size (210 X 297 well widow) ^ 28659

DESCRIPTION OF THE INVENTION When overheating causes softening or burning, or both, it still maintains sufficient adhesion. The stone particles can be adhered or sprayed on the material, and can be arranged on or around the supporting backing layer. Alternatively, the supporting backing layer may be coated with an adhesive material, and then the sand particles are disposed thereon. Many other forms of supporting backing layer, granular material, adhesive material, method of arranging sand grains on supporting backing layer, method of adhering sand grains and the like are known from the prior art, and can be included in the present invention Variations in scope.通 # 'In the manufacturing of conventional coated abrasives, a backing layer (with or without pre-treatment) with a maker coat of an adhesive resin is applied, and when the resin is not dry, the The abrasive grit is coated on the undercoat layer, and the hardened adhesive = fixes the grit in place. Then, an adhesive layer (which basically contains an adhesive resin and optionally fillers, grinding aids, and the like) is coated on b and hardened. The basic function of the adhesive layer is to allow the sand particles to be fixed on the feet, so that when the product is ground, the sand particles will not be pulled out of the coated abrasive structure before the grinding function of the sand particles is exhausted. In some cases, a supersize layer is provided on the adhesive layer. The function of the super glue is to place additives on the surface of the coated abrasive to provide special f properties, such as enhanced grinding. Function, surface lubricity, antistatic properties, or anti-load bearing properties of the invention. In general, the surface rubber layer does not need to play any role (but not absolutely) on the coating and abrasive tool to firmly position the sand particles. Additives can be spread on the adhesive (which will then harden) or dispersed as a liquid dispersant, which will leave the additive on the surface after it is completely dry. In a specific embodiment, the adhesive includes a thermosetting resin, a description of the invention (6), a plastic or a thermosetting resin. For example, thermoplastic resins can include latexes and solid resins, which can be selected from the group consisting of acid test, acid test, epoxy resin, amine succinate, and radiation-curable resins. With this additive, an adhesion effect can be achieved on the surface without a dispersion medium. According to the present invention, the anti-supporting agent coated on the adhesive layer may be selected from the group consisting of metal silicate, silicon dioxide, metal carbonate, and metal sulfate. Metal silicates can be selected from the group consisting of magnesium silicate, potassium aluminum silicate, broken acid salt and calcium silicate. In a specific embodiment, magnesium silicate includes talc; potassium aluminum silicate includes mica; aluminum silicate includes clay; and calcium silicate includes wollastonite. Silicon dioxide can be selected from the group consisting of free-melting silicon, fumes, and precipitated amorphous silicon. Metal carbonates may include calcium carbonate. Metal carbonates can include aqueous sulfuric acid # 5 and anhydrous sulfuric acid. According to the present invention, during the use of the inorganic anti-loading agent, micro particles are released, and the micro particles can cover the abrasive particles produced by the grinding process, so that these abrasive particles can be prevented from agglomerating into larger particles and trapped in the coating. On the surface of the coated abrasive (also known as "bearing π"), this will reduce its effectiveness: Therefore, the coated abrasive has a reduced bearing and does not cause problems due to the use of a conventional stearinated anti-bearing layer .Applying the coating film of the particles with the low-energy material of the additive to the surface of the abrasive tool, unless the coating film is removed, it will make the subsequent surface painting or polishing difficult. +, The anti-loading agent of the present invention is quite soft. By way of example, it has a Mohs hardness value below about 7, and preferably a low I 3 < Mohs hardness value. In a specific implementation In the example, the anti-supporting agent has an average particle diameter of less than 30 microns, and the average particle diameter is less than 528659 A7.

In the range of about 1 to about 20 micrometers, 1 the particle size ' of the anti-carrier agent may exhibit better performance. The finer particles have a mechanism that can provide the > $ # 十, >, t the anti-loading properties of the anti-carrier, to prevent the abrasive particles from adhering to each other. This method will produce fine dust during sand grinding. When the inorganic anti-carrier is not used, the grinding debris will more easily form pellets or large chips: but the entrapment is stuck between the particles of the sand, so it cannot play an effective grinding and Reduces the life of the coated abrasive. The use of stearic acid products and the use of stearic acid-free products, the discrepancy i in the sanding process, is obvious. According to the present invention, the concentration of the anti-carrier agent on the outer rubber layer of the sanded surface is about 2% by volume, and more than about 60% by volume is preferable. This ensures that the anti-loading agent contained is sufficiently effective to generate fine dust to avoid agglomeration of abrasive debris. Anti-loading agents can also be used with other abrasives, such as composite (non-woven) abrasives. The size is the same as that of alkali magnesium (, X, in the following examples, a standard custom coated abrasive is used, the backing material is A heavy paper ', and the undercoat and adhesive layer contain pulsaldehyde adhesive In each example, the abrasive particles were p32o alumina. The substrate was coated with an abrasive tool and then coated with a layer of internal anti-loading additives and an outer rubber layer. In one example, the additives were not & For comparison, in the second example, a layer containing a zinc stearate coating was applied. In addition, in the other three examples, hydrous magnesium silicate (talc) with different particle sizes was applied. The additives were applied to latex Or use it as a dispersant in water. Then coat the abrasive tool with a two-way sander to make six connections to an acrylic panel. -10- 7 Paper size is suitable for a country (CN ^ 4 size (2—public love))

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Line 528659 A7 B7 V. Description of the invention (8)-grinding by touching (two-minute interval for each contact). The sanding is performed by a 12.7 cm (5-inch) sanding disc with a load of 4 5 ^ (10-lb). The cutting volume is recorded after sanding for 12 minutes. The performance of the sanding is compared with the control. The percent cut of the group was measured. The average surface roughness (Ra, the arithmetic mean of roughness) is also measured. The results are recorded in Table 1, which shows that talc is as effective as conventional magnesium stearate. Anti-loading substance: Zinc stearate, hydrous magnesium silicate (talc), hydrous magnesium silicate (talc), hydrous magnesium silicate (talc), project control group: zinc stearate Vertal 1500 Supreme HT Arctic Mist 15 micron 7 micron 1.9 micron dry coating weight (g / m2) without 14.80 ～ 13.32 ～ 13.32 ～ 13.32 filler volume% (anti-carrier) Yi 90 81 81 81 binder volume% without 9.05 11 11 11 cut% (Percent of control group) 100% 136% 12 1% 134% 137% Surface roughness, Ra (μm) 0.46 0.41 0.46 0.46 0.46 Table 1

Vertal 1500, Supreme HT and Arctic Mist are talc available from Luzenac America. -11-This paper size is in accordance with Chinese National Standard (CNS) A4 specification (210X297 mm) 528659 A7 B7 V. Description of the invention (9) iH 2: Water-bearing iron ferrite (ί bone stone) of different particle sizes' Supreme ΗΤ or less The tables listed are Supreme HT with magnesium stearate, and a control group without anti-carrier, using P80, P180, P320 (Tables 2, 3 and 4 respectively) as the alumina coated abrasives. Comparison of grinding performance. The results show that the present invention, with the addition of an anti-bearing agent, has a higher cutting degree than the control group, which is especially based on fine sand particles. P80 Control Witco Zn-St Supreme HT Dispersion Liquid Talc Dry Coating Weight (g / m2) None 14.80 ～ 13.32 Filler volume% (anti-carrier) No 90 81 Binder volume% No 9.05 11 Cumulative cutting (g) 21.61 24.43 22.54 Cutting rate to control group 100% 113% 104% Ra (μΐΏ) 1.88 1.96 2.05 Table 2 P180 Control group Witco Zn-St Supreme HT dispersion talc dry coating weight (g / m2) No 14.80 ～ 13.32 Filler volume% (anti-loading agent) No 90 81 Binder volume% No 9.05 11 Cumulative cutting (g) 15.87 23.5 19.76 Cut% of control group 100% 148% 125% Ra μη 0.84 0.89 0.89 Table 3 -12 -This paper size is applicable to Chinese National Standard (CNS) A4 (210 X 297 mm) 528659 A7 B7 V. Description of the invention P320 Control group Witco Zn-St Supreme HT dispersion liquid talc dry coating weight (g / m2) No 14.80 ～ 13.32 Filler volume% (anti-loading agent) No 90 81 Binder volume% No 9.05 11 Cumulative cutting (g) 7.75 13.51 12.93 Cutting degree to the control group 0 / 〇100% 174% 167% Ra (μπι) 0.46 0.41 0.43 Table 4 Example 3: Uncertain opening and closing, alkali-cut calcium (wollastonite), aluminum silicate (clay), silicon-induced potassium aluminum (mother) Use standard P320 grit, A heavy paper alumina coated abrasive. The substrate coated abrasive is coated with an anti-loading additive containing amorphous silicon, calcium silicate (wollastonite), aluminum silicate (clay), or potassium aluminum silicate (mica) The sanding results of the adhesive layer described in Table 5 below show that the present invention has a higher cutting degree than the control group when the anti-carrier agent is added. -13-This paper size is in accordance with Chinese National Standard (CNS) A4 (210 X 297 mm) 528659 A7 B7 V. Description of the invention (11) Anti-carrying substance y Substance blood amorphous calcium silicate anhydrous calcium aluminum silicate (clay) Aqueous crushed aluminum (clay) Contains potassium citrate (mica) Project control group MN-23 Wollastonite Optiwhite Burgess 17 Mica 325 Dry coating weight (g / m2) None 4.44 51.80 7.40 16.28 2.96 Filling volume% (resistance to load) Agent) 81 83 80 79 79 vol% of adhesive 12 12 12 12 12 cutting rate of control group 100% 16 1% 113% 179% 113% 149% surface roughness, Ra (pm) 0.61 0.51 0.43 0.53 0.61 0.38 Table 5 MN-23 is an amorphous stone eve from Eagle Pitcher. Wollastonite 325 is a calcium silicate commercially available from NYCO Minerals. Optiwhite is a clay from Burgess Company. Burgess 17 is a clay available from Burgess Company. Mica 325 is a mica available from Oglebay Norton Specialty Minerals. Example 4: Ginger sulfate sulfate (anhydrous and water-containing) Use standard P320 grit, A heavy paper coated aluminum oxide abrasive. On this base-coated abrasive article, a glue layer containing calcium sulfate (anhydrous and water-containing) anti-loading additives is applied. The sanding results described in Table 6 below 14- This paper size applies the Chinese National Standard (CNS) A4 (210 X 297 mm) 528659 A7 B7 V. The description of the invention (12) shows that compared with the control group , The present invention will have a higher degree of cutting by adding an anti-loading agent. Anti-loading substance Anhydrous calcium sulfate Anhydrous calcium sulfate Project control group SNOW WHITE TERRA ALBA Dry coating weighing (g / m2) No 34.04 29.60 Filler volume% (Anti-loading agent) No 76 82 Binder volume% No 14 9 Control Cut% of the group 100% 153% 141% Surface roughness Ra (μπι) 0.51 0.41 0.43 Table 6 SNOW WHITE is an anhydrous calcium sulfate available from the United States Gypsum Company. TERRA ALBA is an aqueous calcium sulfate available from the United States Gypsum Company. Example 5: Water contact angle of sand-coated panel after sanding As described in Examples 1 to 4, there is an adhesive layer other than P320 grit, and the primary panels are sanded. The same sanding process was performed using various coated abrasives. Then drop a drop of water on each of the freshly polished and unsanded panels, and record the contact angle (㊀) described in the figure. The contact angle is the angle of the contact line between the liquid surface and the solid panel surface. Those who are less humid will show a larger contact angle. The results are shown in Table 7. It can be clearly seen that the panel sanded with the coated abrasive according to the present invention has substantially the same or lower contact angle as the coated abrasive without the anti-load bearing layer. Have Xi -15- This paper size applies to China National Standard (CNS) A4 (210 X 297 mm)

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Line 528659 A7 B7 V. Description of the invention (13) Coating abrasive tools with zinc stearate anti-load bearing layer will obviously deposit slag with low surface energy, which can be seen from the relatively high water contact angle. As a result, when such a surface is lacquered, the surface is not wet-coated quickly, resulting in incomplete lacquering of the surface. Anti-load-bearing stearin-free water-containing aluminum bitate containing dendritic acid but calcium silicate anhydrous zinc acid (talc) Ming (unclay) Sulfate sulfate project control group Supreme Mica 325 Wollast- SNOW Zinc Acid HT onite WHITE Dry coated No 14.80 ~ 7 · 40-17 · 76 2.96 51.80 34.04 Weighing (g / m2) Filler volume% No 90 81 79 83 76 (Anti-loading agent) Binder volume% No 9.05 11 12 10 14 Water contact angle 115 140 114 119 86 107 (degrees) Table 7 The angle of water contact on the panel without sanding is 69 degrees. Although the present invention has been particularly illustrated and described with the relevant preferred embodiments in the text, those skilled in the art should understand that various changes can be made to the present invention without departing from the scope of the attached patent application. The scope of the invention. -16- This paper size applies to China National Standard (CNS) A4 (210X 297mm)

Claims (1)

528659 AB c D 'Applicable patent scope 1 · An abrasive tool with an oversized layer consisting of a material layer consisting essentially of an inorganic anti-carrier, the inorganic anti-carrier is selected from metal silicic acid-AT Group consisting of silicon dioxide, metal carbonates and metal sulfates. The abrasive tool according to claim 1 of the patent scope, wherein the metal salt is selected from the group consisting of free continuous magnesium, potassium aluminum silicate, aluminum silicate and calcium silicate. 3. The abrasive article according to item 2 of the scope of patent application, wherein the magnesium silicate includes talc. 4. The abrasive tool according to item 2 of the scope of patent application, wherein the potassium aluminum silicate includes mica. 05. The abrasive tool according to item 2 of the scope of patent application, wherein the aluminum silicate includes clay. 6. The abrasive tool according to item 2 of the scope of the patent application, wherein the calcium silicate includes silica ash. The abrasive tool according to item 丨 of the scope of the patent application, wherein the silicon dioxide is selected from the group consisting of fused silicon, fumed silicon, and A group of precipitated amorphous silicon. 8. The abrasive article according to the scope of claim 1, wherein the metal carbonate comprises calcium carbonate. ^ 9. The abrasive tool according to item 丨 of the patent application scope, wherein the metal sulfate includes hydrous calcium sulfate and anhydrous calcium sulfate. " 10. Roots, patented article 1 of the abrasive article, wherein the anti-loading agent has a Mohs hardness value of less than about 7. 8. 11. The abrasive article according to the scope of patent application, wherein the average particle diameter of the anti-carrier agent is less than about 30 microns. / 12. The abrasive tool according to item " of the scope of patent application, wherein the average particle diameter of the anti-supporting plant is in the range of 1 to 20 microns. = -17 This paper size applies to Chinese National Standard (CNS) A4 specifications (210 X 297 mm) 6. Application for patent scope 13. Abrasive tools according to item 1 of patent application scope, where the anti-carrier agent is mainly concentrated in Oversized layer. 14. The abrasive article according to item i of the application, wherein the anti-loading agent accounts for at least 10% by volume of the outer rubber layer. 15. The abrasive article according to item 14 of the scope of application for a patent, wherein the anti-loading agent occupies at least 60 volume 0/0 of the outer rubber layer. 16. The abrasive article according to item 丨 of the scope of the patent application, wherein the anti-carrier agent particles < size are such that when the coated surface is used to sand the paint-coated surface to produce abrasive wear debris, the anti-carrier agent particles will Releases the size that is combined with it to prevent the abrasive particles from aggregating. X 17. The abrasive article according to item} of the patent application scope, wherein the abrasive article is selected from the group consisting of a coated abrasive article or a composite abrasive article. 18. The abrasive article ' according to item i of the application, wherein the anti-carrier agent is dispersed in an adhesive. 19. An abrasive article according to item 18 of the scope of the patent application, wherein the adhesive includes 埶 plastic or thermosetting resin "" '20. An abrasive article according to the scope of claim 19, wherein the thermoplastic resin includes latex. The abrasive tool according to item 19 of the scope of the patent application, wherein the thermosetting tree μ is selected from the group consisting of a system of resin, epoxy resin, urethane, and radiation-hardenable resin. 22 · —A kind of abrasive, comprising: a backing layer having a first surface; • an abrasive layer having a plurality of abrasive particles arranged on the backing layer—Table-18— The paper dimensions are applicable to the Chinese National Standard (CNS ) A4 size (210 X 297 mm) 528659 AB c D, patent application scope ® 1: and a material layer composed of an inorganic anti-supporting agent arranged on the abrasive layer. 23. The abrasive article according to item 22 of the scope of patent application, wherein the anti-carrier agent is selected from the group consisting of free metal silicate, silicon dioxide, metal carbonate and metal sulfate. 24. The abrasive tool according to Item 23 of the declared patent scope, wherein the metal salt is selected from the group consisting of magnesium silicate, potassium aluminum silicate, aluminum silicate, and calcium silicate. 25. The abrasive article according to item 22 of the patent claim, wherein the size of the anti-carrier particles is such that when the coated surface is sanded by a coated abrasive to generate abrasive debris, the anti-carrier particles will Releases the size that is combined with it to prevent the abrasive particles from aggregating. μ 26 · —A method for preparing an abrasive article, comprising: adhering a plurality of abrasive particles to a first surface of a back layer; and disposing an abrasive layer consisting essentially of an anti-loading agent on the abrasive, wherein the anti-loading The agent is selected from the group consisting of metal silicate, silicon dioxide, metal carbonate and metal sulfate. 27. According to the method of the Chinese patent, wherein the gold is selected from the group consisting of magnesium, material, material, and material; 28. The method according to item "Scope of claim for clearing patents", wherein the silicic acid Magnesium includes Yan Shi 0. 29. The method according to item 26 of the scope of patent application, which additionally includes the step of selecting an anti-carrier agent from materials having a degree of fretting value of less than about 7. 30. Please refer to item 26 of the patent scope Method, which also includes the average size of -19- this paper size applies Chinese National Standard (CNS) Α4 specifications (210X297 public directors) 528659 Λ BCD ----- --- 6. the scope of patent application grain size is about low In a 30 micron material, the step of selecting the anti-carrier agent is selected. • According to the method of the patent application scope item 26, it further includes the step of preparing the sanded surface of the abrasive tool and the anti-carrier agent is mainly on it. 32. The method according to item 26 of the patent application, which further comprises the step of dispersing an anti-carrier agent in a binder, the binder comprising a thermoplastic resin. U 20- This paper size applies Chinese National Standard (CNS) A4 Specifications (210 x 297 mm) " & q uot; -----