CN114346922A - Integrated glue-coated pattern type coated abrasive tool and preparation method thereof - Google Patents
Integrated glue-coated pattern type coated abrasive tool and preparation method thereof Download PDFInfo
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- CN114346922A CN114346922A CN202111562045.4A CN202111562045A CN114346922A CN 114346922 A CN114346922 A CN 114346922A CN 202111562045 A CN202111562045 A CN 202111562045A CN 114346922 A CN114346922 A CN 114346922A
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Abstract
The invention provides an integrally-coated pattern type coated abrasive tool and a preparation method thereof. Coated abrasive tool uses napping cloth as the substrate, has a whole parcel layer by the resin formation, whole parcel layer covers the area that does not cover the primer on abrasive material layer, primer layer side, the non-matte of napping cloth, napping cloth has the napping coil basal portion of matte and exposes the top of napping coil, the fibrous surface of napping cloth longitude and latitude. The integral wrapping layer can solve the problem that the patterned abrasive material layer partially and integrally falls off on the base material under the condition of not performing early pretreatment on the napping cloth, so that the grinding tool with good mechanical strength and no curling is obtained; meanwhile, the napping coil of the napping cloth is not damaged, and the bonding force between the napping coil and the napping cloth on the polishing tool is kept; and the gaps among the fibers of the napping cloth are kept, so that the dust-collecting and dust-removing device can be used for dust collection and dust removal of the polishing tool without additionally drilling dust-removing holes.
Description
Technical Field
The invention belongs to the field of coated abrasive tools, and particularly relates to an integrally-coated abrasive tool and a preparation method thereof.
Background
Among the prior art coated abrasives are those in which abrasive grains are not uniformly distributed over the entire main surface of the base material of the abrasive but are collected in a pattern within the pattern of the main surface of the base material in a pattern, and abrasive grains are absent from the main surface of the base material outside the pattern. In the present invention, an abrasive article having such a distribution of abrasive particles is referred to as a "coated abrasive article having a patterned abrasive layer", and an exemplary product of this type is shown schematically in cross-section in fig. 4. One advantage of such an abrasive article is that the major surface of the substrate, where the abrasive particles are not distributed, defines channels that receive and remove swarf formed during the grinding process, so that the surface of the abrasive article does not overheat during grinding and retains sufficient grinding ability.
In the prior art, a coated abrasive tool with a patterned abrasive layer is prepared by coating a base coat on a base material according to a preset pattern, planting abrasive particles on the base coat, and then coating a compound coat. The phenomenon that the whole abrasive layer on the local part of the surface of the grinding tool is stripped from the primer can occur in the grinding process.
In addition, various types of substrates can be used for the coated abrasive tool with the patterned abrasive layer, in order to connect the abrasive tool and the polishing tool, a felt cloth is usually adhered to the back surface of the substrate of the abrasive tool through an adhesive to form a complete abrasive tool, the abrasive tool is cut into a disc shape, a strip shape and the like through a cutting machine, and then the felt cloth adhered to the back surface of the substrate is matched with the surface of the felt cloth on the corresponding polishing tool to be used for grinding materials such as metal or wood. After the coated abrasive tool with the patterned abrasive layer loses the grinding capacity, the coated abrasive tool can be replaced by separating the connection between the napping cloth on the back surface of the abrasive tool base material and the napping cloth on the grinding tool. Therefore, the napping cloth mainly plays a role of connecting the grinding tool and the grinding tool in the existing grinding tool, and actually, the structure of the grinding tool is complicated, so that links of the manufacturing process are increased.
The complexity of construction and manufacture of such abrasive articles is magnified in addressing another application. Due to the fact that grinding dust can be formed in the grinding tool grinding process and becomes a large amount of dust, the working environment of workers is severe. In order to reduce the abrasive dust floating in the air, the grinding tool usually has a dust absorption function, and accordingly, after the grinding tool is manufactured, dust removal holes are punched when the grinding tool is cut into a shape matched with the grinding tool. Because the shape and position of the dust removal holes on each grinding tool are not uniform, different types of grinding tools are required to be customized to meet the requirements of customers, and the defects of the structure and manufacturing complexity of the grinding tool are enlarged.
Disclosure of Invention
The invention is in order to solve the prior art, the abrasive material layer of the coated abrasive tool with patterned abrasive material layer appears the problem that the local whole piece drops in the process of polishing, and the problem that the structure and manufacture of the abrasive tool are complicated, try to improve the structure of the abrasive tool in the research, as a result, when the napped cloth is directly used as the base material of the coated abrasive tool, under the condition of not pre-treating the napped cloth in the early stage, the adhesive layer which plays the role of the adhesive coating layer on the previous abrasive tool is extended to form an integral wrapping layer which can completely coat the main surface and the back surface of the base material of the napped cloth and the internal fibers of the napped cloth, so that the coated abrasive tool with patterned abrasive material layer is obtained, the structure is simple, and the problem that the local whole piece drops on the base material of the patterned abrasive material layer can be solved; the grinding tool with good mechanical strength and no curl can be obtained under the condition of omitting the pretreatment of the napping cloth; meanwhile, the napping coil of the napping cloth is not damaged, and the bonding force between the napping coil and the napping cloth on the polishing tool is kept; and the gaps among the fibers of the napping cloth are kept, so that the dust-collecting and dust-removing device can be used for dust collection and dust removal of the polishing tool without additionally drilling dust-removing holes.
In a first aspect of the present disclosure, a coated abrasive is provided having a patterned abrasive layer.
According to the invention, the grinding tool takes the napping cloth as a base material, the non-suede surface of the napping cloth is provided with a bottom glue layer in a patterned distribution, an abrasive material layer positioned on the bottom glue layer, and the grinding tool also comprises an integral wrapping layer formed by resin.
According to the invention, the integral wrapping layer is continuous and completely covers the abrasive material layer, the side surface of the primer layer, the area which is not covered by the primer on the non-suede surface of the napped cloth, the base part of the napped coil with the suede surface and exposed out of the top part of the napped coil, and the whole surface of the warp and weft fibers inside the napped cloth. According to the invention, the integral wrapping layer does not block the gaps formed by warp and weft fibers in the napping cloth.
In the present invention, the napped fabric non-pile side, i.e. the side having the make layer and abrasive layer, is referred to as the substrate major surface, and the other side of the napped fabric opposite the major surface is referred to as the substrate back side.
According to the invention, the napping cloth is used in the field for manufacturing abrasive tools which can be adhered to a grinding tool, and is also called napping back napping cloth, the main surface of a base material of the napping cloth is not provided with napping loops, and the back surface of the base material is napped, knitted or sanded looped piles. The terry loops (also called "napped loops") may be arranged in an ordered pattern on the back of the substrate or in a disordered pattern on the back of the substrate. In some embodiments of the invention, the napping has a grammage of 75 to 200g/m2E.g. 80g/m2、90g/m2、100g/m2、110g/m2、120g/m2、130g/m2、140g/m2、150g/m2、160g/m2、170g/m2、180g/m2、190g/m2And the like.
According to the invention, preferably on the back side of the base material, the integral wrapping layer covers 3-20%, more preferably 3-10% of the height of the napped coil layer. The height of the napped coil layer is in the direction from the base of the napped coil layer to the top.
According to the invention, the napping cloth is not pretreated and a pretreatment glue layer is not formed before the primer glue layer is coated.
According to the present invention, the primer may be a primer commonly used in the art for abrasive tool substrates, including but not limited to: one or a combination of acrylic, epoxy, phenolic, PU, PVA, latex, hot melt adhesive, are used in the same manner as the primer technology used in prior art coated abrasives having patterned abrasive layers.
The resin used to form the integral wrap according to the present invention may be a resin commonly used in the art for coated abrasive articles, including but not limited to: one or a combination of acrylic acid, epoxy resin, phenolic aldehyde, PU resin, PVA, latex and hot melt adhesive, and the viscosity of the adhesive is 30-100 CPS. In some embodiments of the invention, the viscosity of the resin of the integral coating is, for example, 40CPS, 50CPS, 60CPS, 70CPS, 80CPS, 90CPS, 100 CPS.
The viscosity of the compound glue resin commonly used for coating the grinding tool is 400-1500CPS, and the viscosity range can ensure that the compound glue solution has certain thickness on the grinding material layer, thereby playing a role of firming the grinding material layer and preventing sand falling. The inventors have found that when a resin in this conventional viscosity range is used to produce a bulk wrapping layer in the course of the improvement of the present invention, no effective bulk wrapping effect can be achieved for a napped fabric. However, when a resin with lower viscosity is used, the discovery is unexpected that not only can an effective integral coating be formed, but also the abrasive material falling phenomenon caused by using a resin compound with lower viscosity in the traditional grinding tool can not occur.
According to the invention, the resin of the primer and/or the integral coating layer can also comprise a filler, and the filler is also a filler commonly used in the field, and comprises but is not limited to calcium carbonate, wollastonite, titanium dioxide, silicon dioxide, bentonite and the like, and can be one or a mixture of two or more of the above.
According to the invention, the make layer is applied to the major surface of the substrate in a predetermined pattern, which is also the pattern of the abrasive layer. The pattern may be predetermined and the primer layer may be applied to the major surface of the substrate in a predetermined pattern by means of an anilox roll, a screen, or 3D printing, which are commonly used in the art.
According to the invention, the abrasive layer is arranged on the bottom glue layer, and abrasive particles can be implanted on the bottom glue layer by adopting the modes of electrostatic sand planting, gravity sand planting and the like which are commonly used in the field. Therefore, in the abrasive article of the present invention, the regions of the major surface of the substrate that do not have the make coat are free of abrasive material, and therefore, voids or channels are formed in the regions of the major surface of the substrate that do not have the abrasive material, which can be used to contain and remove swarf, to ensure that the surface of the abrasive article does not overheat during grinding, and to maintain sufficient grinding force.
According to the present invention, the abrasive particles in the abrasive layer may be one layer or a plurality of layers. A layer of abrasive particles, which can be obtained by sanding, is generally composed of abrasive particles having a uniform size or a mixture of abrasive particles having a relatively close size. The multiple layers of abrasive particles can be obtained by sand-planting from a mixture of abrasive particles having a large difference in particle size, or by controlling the thickness of the primer so that abrasive particles having relatively close particle sizes are formed in an overlapping manner.
The pattern of the make layer and abrasive layer may be a pattern of regular and/or irregular shapes that are arranged repeatedly in a fixed, repeating pattern, or may be a pattern of randomly arranged regular and/or irregular shapes. In an abrasive article, the regular shape may be a regular shape, and may be a combination of two or more regular shapes. The regular shapes include, but are not limited to, circles, ovals, triangles, polygons with straight sides (e.g., parallelograms, rhombuses, squares, rectangles, pentagons, hexagons, octagons, etc.), and the like. The irregular shape may be one kind of irregular shape, and may be a combination of two or more kinds of irregular shapes. The irregular shape includes, but is not limited to, a shape in which the sides are irregularly curved. The regular shapes and/or irregular shapes may be independent of each other with spaces therebetween to form voids for receiving and discharging the abrasive dusts. The regular shapes and/or irregular shapes may be partially independent of each other and partially fused and continuously connected with each other, and a space outside the pattern shape forms a void for receiving and discharging the abrasive dust.
It will be understood by those skilled in the art that the shape of the voids for receiving and discharging the abrasive dusts other than the pattern shape of the abrasive layer may be regular or irregular accordingly. The width of the voids may be 1.5 to 10.5mm when the size of the voids is defined as its "width" from a view perpendicular to the major surface of the substrate.
Preferably, the coverage rate of the abrasive layer on the main surface of the base material is 20-80%. For the abrasive particles with the diameter larger than P220, the coverage rate of the abrasive layer on the main surface of the base material is preferably 55-65%. The abrasive layer preferably has a coverage of 70 to 80% on the main surface of the base material, wherein the abrasive particles have a particle size of P220 or less.
In one embodiment of the present invention, the pattern of the abrasive layer is a pattern consisting of regular shapes repeatedly arranged in a fixed repetitive manner, and the shapes of the voids for receiving and discharging the abrasive dusts are also regular. Preferably, the regularly shaped parts are independent of each other, and the parts are fused and continuously connected with each other. For abrasive particles having a particle size greater than P220, it is preferred that the width of the interstices is from 2.5 to 3.5 mm. For the abrasive grains having a grain size of P220 or less, it is preferable that the width of the voids is 1.5 to 2.5 mm.
According to the present invention, the abrasive particles are abrasive particles commonly used in the art, including, but not limited to, fused aluminum oxide, heat-treated aluminum oxide, ceramic abrasives, white corundum, black silicon carbide, green silicon carbide, titanium diboride, boron cemented carbide, tungsten cemented carbide, titanium cemented carbide, diamond, cubic boron nitride, garnet, fused aluminum zirconium abrasives, sol gel abrasive particles, silica, iron oxide, chromium oxide, ceria, zirconia, titania, silicates, metal carbonates (e.g., calcium carbonate (e.g., chalk, calcite, marl, travertine, marble, and limestone), dolomite, sodium carbonate, magnesium carbonate), silica (e.g., quartz, glass beads, glass bubbles, and glass fibers).
According to the invention, the grinding tool can further comprise a coating outside the integral wrapping layer at the contact position of the integral wrapping layer and the grinding material layer, and the coating has an anti-static function or an anti-blocking function on a fine structure on the grinding material layer.
The inventor of the invention has surprisingly found that if the base material adopts the napping cloth, the integral wrapping layer can also provide enhanced supporting function, so that the napping cloth can be independently used as the base material of the grinding tool, and the structure and the manufacturing link of additionally sticking the napping cloth on the back surface of the base material in the past for connecting the napping cloth with a grinding tool in the grinding tool are omitted; and the whole wrapping layer can save the defect that when the napping cloth is used as a base material, pretreatment is needed to overcome the defect that the napping cloth is too soft and cannot be used for directly coating primer and subsequent sand planting, and the structure and the manufacturing process of the grinding tool are simplified. The coated abrasive tool with the whole wrapping layer and the patterned abrasive layer also avoids the phenomenon that a plurality of adhesive layers of the conventional abrasive tool have different extension coefficients after absorbing water due to the consistency of the adhesive components of the whole wrapping layer, and the problem that the abrasive tool is curled can not occur. The inventor of the invention further researches and discovers that the adhesive used for the integral wrapping layer is adjusted to a proper range by taking the napping cloth as the base material, so that the adhesive can uniformly enter gaps of napping terry of the napping cloth, various performances of the napping terry can not be damaged, and the napping terry part exposed out of the integral wrapping layer has good viscosity and is tightly connected with the napping cloth of a polishing tool.
And the adhesive strength of the integral wrapping layer is adjusted to be in a proper range, the adhesive can permeate into the napping cloth fibers to wrap the surfaces of the fibers, and gaps among the fibers cannot be closed, so that the coated abrasive tool which is obtained by processing and takes the napping cloth as the base material can absorb abrasive dust formed during polishing through the dust absorption effect of the polishing tool after being bonded to the polishing tool, and dust is reduced.
Another aspect of the present invention provides a method of preparing the coated abrasive having the patterned abrasive layer, comprising the steps of:
1) coating a primer on the main surface of the napped fabric substrate which is not subjected to pretreatment according to a preset pattern;
2) forming an abrasive layer on the make coat and then drying;
3) and (3) immersing the whole dried base material with the abrasive layer into resin glue solution with the viscosity of 30-100CPS for forming an integral wrapping layer, extruding to form the integral wrapping layer, and then drying and curing.
According to the present invention, the primer applied in a predetermined pattern may be formed in the form of an anilox roller, a screen, or a 3D printing.
According to the invention, the abrasive layer can be formed by electrostatic or gravity sanding.
Has the advantages that:
1. according to the invention, the napping cloth is used as the base material of the grinding tool, and the integral wrapping layer can solve the problem that the grinding material layer is partially and integrally peeled off from the base material in the grinding process of the coated grinding tool with the patterned grinding material layer, so that the durability of the coated grinding tool with the patterned grinding material layer is improved.
2. The integral wrapping layer provides a reinforcing supporting function for the coated abrasive tool product taking the napping cloth as the abrasive tool base material, and can meet the performance requirements of mechanical hardness and strength of the used product without pretreatment before the napping cloth is used; the grinding tool is prepared by only adopting the napping cloth as the base material, the structure that the napping cloth and the base material of the grinding tool are compounded to be connected with a grinding tool in the past is reduced, the structure of the grinding tool is simplified, raw materials are saved, and the manufacturing links are reduced;
3. the base glue layer with the preset pattern is coated on the substrate, and the abrasive particles are only distributed on the base glue layer, so that dust absorption and heat dissipation channels are formed in the abrasive layer, dust in the grinding process can better enter the dust absorption channels, and the working environment is improved;
4. through the processing mode of whole parcel layer, reduced the production processes, practiced thrift manufacturing cost greatly, reduced the consumption of the energy to make the overall structure of whole goods more unanimous, increased the stiffness of goods, favorable to using plane grinding.
Drawings
FIG. 1 is a schematic cross-sectional view of an abrasive article according to an embodiment of the present invention
Wherein 1-a substrate; 2-a primer layer; 3-an abrasive layer; 4-integral coating layer; 5-a napped coil layer on the back of the substrate; 6-areas of the major surface of the substrate not coated with primer and abrasive particles.
FIG. 2 is a plan view of one embodiment of the abrasive layer pattern of the abrasive article of the present invention, wherein 2-the make coat, 6-the areas of the major surface of the substrate not coated with make coat and abrasive particles.
FIG. 3 is a plan view of a physical article showing one embodiment of the abrasive layer pattern of the abrasive article of the present invention, wherein 2-the make coat, on which the abrasive particles are embedded to form the abrasive layer, and 6-the areas of the major surface of the substrate that are not coated with make coat and abrasive particles.
FIG. 4 is a longitudinal cross-sectional view of an example of a prior art coated abrasive having a patterned abrasive layer. Wherein 1-a substrate; 2-a primer layer; 3-an abrasive layer; 6-areas of the major surface of the substrate not coated with primer and abrasive particles; 7-compound glue layer.
Fig. 5 photographs of the example 1, comparative example 1 and comparative example 2 after grinding of the abrasive article sample, wherein a is a photograph of the abrasive article sample of example 1, B is a photograph of the abrasive article sample of comparative example 1, and C is a photograph of the abrasive article sample of comparative example 2.
Detailed Description
The present invention is further described below with reference to examples. It should be noted that the examples are not intended to limit the scope of the present invention, and those skilled in the art will appreciate that any modifications and variations based on the present invention are within the scope of the present invention.
The conventional reagents used in the following examples are commercially available.
Fig. 1-3 illustrate embodiments of the abrasive article of the present invention, and the invention is further described with reference to fig. 1-3.
Referring to fig. 1-3, the coated abrasive with a patterned abrasive layer according to the present invention includes a substrate 1, a make coat 2, an abrasive layer 3, and an integral wrap 4. The base material 1 is napped cloth, the back surface of the base material 1 is a napped coil layer 5 which is napped or sanded, and the base material 1 is not subjected to other pretreatment before primer coating, so that other pretreatment glue layers are not formed. A primer layer 2 is coated on the main surface of a base material 1 according to a preset pattern, and then sand is planted on the primer layer to obtain an abrasive material layer 3 which is consistent with the pattern arrangement of the primer layer and has a certain rule. Then, an integral wrapping layer 4 is formed on the main surface and the back surface of the abrasive layer 3 and the substrate 1 and the area 6 which is not coated with the primer and the abrasive-free particles, the integral wrapping layer 4 wraps the whole abrasive layer 3, the side surface of the primer layer, the area 6 which is not coated with the primer and the abrasive-free particles on the main surface of the substrate, the whole surface of warp and weft fibers in the napped cloth, and the base of the napped coil layer 5 covered on the back surface of the substrate.
The predetermined pattern is a regular shape or an irregular shape of a circle or other shape, and the pattern is not present in a single regular shape in isolation but is a continuous pattern formed of each regular shape or irregular shape.
The abrasive layer 3 has a coverage rate of 20-75% on the main surface of the base body.
The gap width of the uncoated primer area between the abrasive layers is 1.5-10.5 mm.
Example 1
1) Base glue and sand planting. Selecting 100g/m2The napping cloth is gray fabric, corresponding anilox rollers are prepared according to the pattern of figure 2 to coat base glue resin to form a base glue layer, the width of a blank area 6 of the pattern is 2mm, and the base glue resin comprises the following components: 2426100 kg of phenolic aldehyde, 30kg of calcium carbonate 1200 meshes, 20kg of water, SD 51650 kg of styrene-butadiene latex and 10kg of thickening agent PVA; the thickness of the primer layer was 20 μm. Adopting electrostatic sand-planting to form a grinding material layer, wherein the adopted grinding material is a ceramic grinding material P120, and the sand-planting amount is 80g/m2And dried at 80 to 120 ℃ for 30 min.
2) Coating the whole coating layer. Completely immersing the sample obtained in the step 1) into a resin glue solution, wherein the resin glue solution comprises 2426100 kg of phenolic aldehyde, 100kg of water and 0.01kg of 8003 fluorescent lemon yellow (the fluorescent lemon yellow is added mainly to see the patterns of the abrasive layer more clearly and not to influence other effects), and the viscosity of the glue solution is 40 CPS. And extruding by two rollers to obtain an integral coating layer which is coated on the abrasive layer, the side surface of the primer layer, the primer-uncoated area of the main surface of the substrate, the full surface of the warp and weft fibers of the substrate, the back surface of the substrate and covers the base part of the napping coil layer. Drying at 80-150 deg.C for 30min, and curing at 120 deg.C for 4 hr.
The sample obtained above was cut into 6-inch disks and used in combination with a grinding tool.
Example 2
1) Base glue and sand planting. Selecting 100g/m2The napping cloth is gray fabric, corresponding anilox rollers are prepared according to the pattern of figure 2 to coat base glue resin to form a base glue layer, the width of a blank area 6 of the pattern is 2mm, and the base glue resin comprises the following components: 2426100 kg of phenolic aldehyde, 30kg of calcium carbonate 1200 meshes, 20kg of water, SD 51650 kg of styrene-butadiene latex and 10kg of thickening agent PVA; the thickness of the primer layer was 20 μm. MiningElectrostatic sand planting is used for forming a grinding material layer, the adopted grinding material is a ceramic grinding material P120, and the sand planting amount is 80g/m2And dried at 80 to 120 ℃ for 30 min.
2) Coating the whole coating layer. Completely immersing the sample obtained in the step 1) into a resin glue solution, wherein the resin glue solution comprises 2426100 kg of phenolic aldehyde, 80kg of water and 0.01kg of 8003 fluorescent lemon yellow (the fluorescent lemon yellow is added mainly to see the patterns of the abrasive layer more clearly and not to influence other effects), and the viscosity of the glue solution is 80 CPS. And extruding by two rollers to obtain an integral coating layer which is coated on the abrasive layer, the side surface of the primer layer, the primer-uncoated area of the main surface of the substrate, the full surface of the warp and weft fibers of the substrate, the back surface of the substrate and covers the base part of the napping coil layer. Drying at 80-150 deg.C for 30min, and curing at 120 deg.C for 4 hr.
The sample obtained above was cut into 6-inch disks and used in combination with a grinding tool.
Comparative example 1
1) Base glue and sand planting. Selecting 100g/m2The napping cloth is gray fabric, corresponding anilox rollers are prepared according to the pattern of figure 2 to coat base glue resin to form a base glue layer, the width of a blank area 6 of the pattern is 2mm, and the base glue resin comprises the following components: 2426100 kg of phenolic aldehyde, 30kg of calcium carbonate 1200 meshes, 20kg of water, SD 51650 kg of styrene-butadiene latex and 10kg of thickening agent PVA, wherein the thickness of a primer layer is 20 mu m. Adopting electrostatic sand-planting to form a grinding material layer, wherein the adopted grinding material is a ceramic grinding material P120, and the sand-planting amount is 80g/m2And dried at 80 to 120 ℃ for 30 min.
2) Coating the whole coating layer. Completely immersing the sample obtained in the step 1) into a resin glue solution, wherein the resin glue solution comprises 2426100 kg of phenolic aldehyde, 150kg of water and 0.01kg of 8003 fluorescent lemon yellow, the viscosity of the glue solution is 20CPS, and then extruding the glue solution by two rollers to obtain an integral coating layer which is coated on the abrasive material layer, the side surface of the primer layer, the primer area of the main surface of the base material, the whole surface of the warp and weft fibers of the base material, the back surface of the base material and the base part of the napping coil layer. Drying at 80-150 deg.C for 30min, and curing at 120 deg.C for 4 hr.
The sample obtained above was cut into 6-inch disks and used in combination with a grinding tool.
Comparative example 2
1) Base glue and sand planting. Selecting 100g/m2The napping cloth is gray fabric, corresponding anilox rollers are prepared according to the pattern of figure 2 to coat base glue resin to form a base glue layer, the width of a blank area 6 of the pattern is 2mm, and the base glue resin comprises the following components: 2426100 kg of phenolic aldehyde, 30kg of calcium carbonate 1200 meshes, 20kg of water, SD 51650 kg of styrene-butadiene latex and 10kg of thickening agent PVA, wherein the thickness of a primer layer is 20 mu m. Adopting electrostatic sand-planting to form a grinding material layer, wherein the adopted grinding material is a ceramic grinding material P120, and the sand-planting amount is 80g/m2And dried at 80 to 120 ℃ for 30 min.
2) Coating the whole coating layer. Completely immersing the sample obtained in the step 1) into a resin glue solution, wherein the main components of the resin glue solution are 2426100 kg of phenolic aldehyde, 50kg of water and 0.01kg of 8003 fluorescent lemon yellow, the viscosity of the glue solution is 200CPS, and then extruding the glue solution by two rollers to obtain an integral coating layer which is coated on the abrasive material layer, the side surface of the primer layer, the primer area of the main surface of the base material, the whole surface of the warp and weft fibers of the base material, the back surface of the base material and the base part of the napping coil layer. Drying at 80-150 deg.C for 30min, and curing at 120 deg.C for 4 hr.
The sample obtained above was cut into 6-inch disks and used in combination with a grinding tool.
Comparative example 3
1) Base glue and sand planting. Selecting 100g/m2The napping cloth is gray fabric, corresponding anilox rollers are prepared according to the pattern of figure 2 to coat base glue resin to form a base glue layer, the width of a blank area 6 of the pattern is 2mm, and the base glue resin comprises the following components: 2426100 kg of phenolic aldehyde, 30kg of calcium carbonate 1200 meshes, 20kg of water, SD 51650 kg of styrene-butadiene latex and 10kg of thickening agent PVA, wherein the thickness of a primer layer is 20 mu m. Adopting electrostatic sand-planting to form a grinding material layer, wherein the adopted grinding material is a ceramic grinding material P120, and the sand-planting amount is 80g/m2And dried at 80 to 120 ℃ for 30 min.
2) Coating glue: the compound gum solution is 2426100 kg of phenolic aldehyde, 20kg of water, 8003 kg of fluorescent lemon yellow and 1000CPS in viscosity, a corresponding anilox roller is prepared according to the pattern of the figure 2, and a glue layer is coated on the grinding material layer. The compound glue layer only covers the upper part of the abrasive layer and does not cover the non-abrasive area 6. Drying at 80-150 deg.C for 30min, and curing at 120 deg.C for 4 hr. The sample obtained above was cut into 6-inch disks and used in combination with a grinding tool.
Comparative example 4
1) Treating a base material: selecting 100g/m2The napping cloth is gray cloth, the napping cloth base material is subjected to cloth treatment by adopting glue solution, the surface without fluff is subjected to front coating treatment, and the glue solution formula comprises PVA, butyronitrile latex and water according to the mass ratio of 100: 50: 50. the viscosity is 1500cps, and the drying temperature is 150 deg.C, 5 min.
2) Base glue and sand planting. Preparing a corresponding anilox roller according to the pattern of fig. 2 to apply a primer resin to form a primer layer, the blank area 6 of the pattern having a width of 2mm, wherein the primer resin comprises: 2426100 kg of phenolic aldehyde, 30kg of calcium carbonate 1200 meshes, 20kg of water, SD 51650 kg of styrene-butadiene latex and 10kg of thickening agent PVA, wherein the thickness of a primer layer is 20 mu m. Adopting electrostatic sand-planting to form a grinding material layer, wherein the adopted grinding material is a ceramic grinding material P120, and the sand-planting amount is 80g/m2And dried at 80 to 120 ℃ for 30 min.
3) Coating glue: the compound gum solution is 2426100 kg of phenolic aldehyde, 20kg of water, 8003 kg of fluorescent lemon yellow and 1000CPS in viscosity, a corresponding anilox roller is prepared according to the pattern of the figure 2, and a glue layer is coated on the grinding material layer. The compound glue layer only covers the upper part of the abrasive layer and does not cover the non-abrasive area 6. Drying at 80-150 deg.C for 30min, and curing at 120 deg.C for 4 hr.
The sample obtained above was cut into 6-inch disks and used in combination with a grinding tool.
Comparative example 5
1) Treating a base material: selecting 100g/m2The napping cloth is gray cloth, the napping cloth base material is subjected to cloth treatment by adopting glue solution, the surface without fluff is subjected to front coating treatment, and the glue solution formula comprises PVA, butyronitrile latex and water according to the mass ratio of 100: 50: 50. the viscosity is 1500cps, and the drying temperature is 150 deg.C, 5 min.
2) Base glue and sand planting. Preparing a corresponding anilox roller according to the pattern of fig. 2 to apply a primer resin to form a primer layer, the blank area 6 of the pattern having a width of 2mm, wherein the primer resin comprises: 2426100 kg of phenolic aldehyde, 30kg of calcium carbonate 1200 meshes, 20kg of water, SD 51650 kg of styrene-butadiene latex and 10kg of thickening agent PVA, wherein the thickness of a primer layer is 20 mu m. Forming abrasive by electrostatic sand-plantingThe layer adopts ceramic abrasive P120 with the sand planting amount of 80g/m2And dried at 80 to 120 ℃ for 30 min.
3) And (6) coating glue. The compound glue solution is 2426100 kg of phenolic aldehyde and 20kg of water, the viscosity is 1000CPS, the compound glue layer is coated by adopting the traditional roller coating, the whole compound glue layer covers the main surface of the base material, and covers the upper part of the abrasive material layer and the area 6 without abrasive materials. Drying at 80-150 deg.C for 30min, and curing at 120 deg.C for 4 hr.
The sample obtained above was cut into 6-inch disks and used in combination with a grinding tool.
Application testing
1. Evaluation of matrix fiber pore Permeability
The distribution of the glue solution on the surface of the base material and the light transmittance/hole plugging condition of fiber pores are observed visually by the permeability of the matrix fiber pores, the distribution of the glue solution and the light transmittance/hole plugging condition of fiber pores are divided into 0-5 minutes, 0 represents that the glue solution is thickly coated on the surface of the base material, and the fiber pores are completely plugged by the glue solution; 1 represents that glue solution can be observed to be coated on the surface of the base material, and 80% of fiber gaps are blocked by the glue solution; 2, observing that the glue solution is coated on the surface of the base material, and blocking 60% of fiber gaps by the glue solution; 3, coating the glue solution on the surface of the base material, and plugging 40% of fiber gaps by the glue solution; 4, the glue solution is coated on the surface of the base material, and 20% of fiber gaps are blocked by the glue solution; and 5 represents that the glue solution is coated on the surface of the substrate, and the fiber gaps are basically transparent (not blocked by the glue solution).
Table 1 evaluation of matrix fiber pore permeability of samples:
| sample (I) | Porosity of matrix |
| Example 1 | 5 |
| Example 2 | 5 |
| Comparative example 1 | 5 |
| Comparative example 2 | 1 |
| Comparative example 3 | 4 |
| Comparative example 4 | 1 |
| Comparative example 5 | 0 |
2. Abrasive layer firmness test
All samples were tested for abrasive layer release by the following test methods:
sample size: 6 inch round disc; grinding equipment: a disc automatic grinding machine with dust collection holes; grinding materials: automobile putty, grinding time: 30min, grinding pressure: 3.7kg, rotation speed: 12000rpm, and the peeling of the abrasive layer after grinding was observed.
TABLE 2 abrasive firmness test
3. Grinding force test
All the samples are tested for grinding performance, and the testing method comprises the following steps:
sample size: 6 inch round disc; grinding equipment: a disc automatic grinding machine with dust collection holes; grinding materials: and (3) grinding the automobile putty on an automatic disc grinding machine for 5min, and weighing the removal amount of each sample to the automobile putty. The comparative data are shown in Table 3.
TABLE 3 grinding load test of samples
| Sample (I) | Grinding force (g/5min) |
| Example 1 | 25.0 |
| Example 2 | 25.6 |
| Comparative example 1 | 15.4 |
| Comparative example 2 | 24.3 |
| Comparative example 3 | 19.5 |
| Comparative example 4 | 20.1 |
| Comparative example 5 | 19.8 |
It can be seen from the above table that the grinding forces of examples 1 and 2 are close, which is the best of all samples, and almost no dust is generated during grinding; the grinding force of the comparative example 1 is lower than that of the example 1, and the viscosity of the whole wrapping layer of the comparative example 1 is too low, so that the abrasive layer falls off in the grinding process, and the grinding force is poor; although the grinding force of the comparative example 2 is not much lower than that of the examples 1 and 2, the viscosity of the integral wrapping layer of the comparative example 2 is too high, so that the hole blocking phenomenon of the fiber holes of the matrix is caused, abrasive dust can not well enter dust collection equipment through the holes of the matrix in the grinding process, and the floating dust in the surrounding air is more; in the comparative example 3, the supporting effect of the integral wrapping layer is not provided, the integral flatness is inconsistent with the hardness, and the grinding material layer is separated in the later grinding period, so that the grinding force is integrally reduced; the grinding force of comparative examples 4 and 5 was also low, the grinding ability was affected due to clogging of pores by treating the substrate with cloth, and the number of processes for treating the substrate was large, and the dust could not enter the dust collecting apparatus through the pores of the substrate, and the dust floating in the ambient air was large.
The embodiments of the present invention have been described above. However, the present invention is not limited to the above embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The coated abrasive tool with the patterned abrasive layer is characterized in that the abrasive tool takes napped cloth as a base material, a bottom glue layer in patterned distribution is arranged on a non-napped surface of the napped cloth, the abrasive layer is positioned on the bottom glue layer, and the coated abrasive tool further comprises an integral wrapping layer formed by resin; the integral wrapping layer is continuous and completely covers the abrasive layer, the side surface of the bottom glue layer, the area which is not covered with the bottom glue on the napping cloth non-napping surface, the napping coil base part with the napping surface and exposed out of the top of the napping coil and the surface of warp and weft fibers in the napping cloth; the major surface of the substrate is free of the make layer and is free of the abrasive layer in areas that form voids beyond the patterned make layer and abrasive layer.
2. The coated abrasive article of claim 1 wherein the integral coating covers 3 to 20%, more preferably 3 to 10% of the height of the loop layer.
3. A coated abrasive according to any one of claims 1 to 2 in which the resin used to form the integral coating has a viscosity of 30 to 100 CPS.
4. The coated abrasive of any of claims 1 to 3 wherein the napped fabric is not pretreated and does not form a pretreatment size layer prior to application of the primer size layer.
5. A coated abrasive according to any one of claims 1 to 4 wherein the pattern of the make layer and abrasive layer is a pattern of regular and/or irregular shapes arranged in a fixed repeating pattern or a pattern of randomly arranged regular and/or irregular shapes.
6. The coated abrasive of any one of claims 1 to 5, wherein the abrasive layer has a coverage of 20% to 80% over the major surface of the substrate; preferably, for abrasive particles with a particle size larger than P220, the coverage rate of the abrasive layer on the main surface of the base material is 55-65%; preferably, the coverage of the abrasive layer on the main surface of the base material is 70-80% for the abrasive particles with the diameter of P220 or less.
7. The coated abrasive of any one of claims 1 to 6, wherein the area of the major surface of the substrate free of the make coat defines a void having a width of 1.5 mm to 10.5 mm; preferably, for abrasive particles having a particle size greater than P220, the width of the voids is from 2.5 to 3.5 mm; preferably, the width of the gap is 1.5 to 2.5mm for abrasive particles having a particle size of P220 or less.
8. The coated abrasive of any one of claims 1 to 7 wherein the abrasive further comprises a coating over the integral coating at the location of contact between the integral coating and the abrasive layer.
9. A method of making the coated abrasive of any of claims 1 to 8, comprising the steps of:
1) coating a primer on the main surface of the napped fabric substrate which is not subjected to pretreatment according to a preset pattern;
2) forming an abrasive layer on the make coat and then drying;
3) and (3) immersing the whole dried base material with the abrasive layer into resin glue solution with the viscosity of 30-100CPS for forming an integral wrapping layer, extruding to form the integral wrapping layer, and then drying and curing.
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| CN103722500A (en) * | 2013-11-27 | 2014-04-16 | 苏州道众机械制造有限公司 | Grinding abrasive belt |
| CN203636656U (en) * | 2013-12-12 | 2014-06-11 | 淄博理研泰山涂附磨具有限公司 | Environment-friendly abrasive cloth with brushed cloth base material |
| CN103639912A (en) * | 2013-12-13 | 2014-03-19 | 江苏锋芒复合材料科技集团有限公司 | Back fluff coated abrasive tool product and manufacturing method thereof |
| CN106457524A (en) * | 2014-05-01 | 2017-02-22 | 3M创新有限公司 | Coated abrasive article |
| CN104493737A (en) * | 2014-12-31 | 2015-04-08 | 淄博理研泰山涂附磨具有限公司 | Anti-clogging stereoscopic structure grinding tool and preparation method thereof |
| CN112720283A (en) * | 2020-12-23 | 2021-04-30 | 苏州远东砂轮有限公司 | Antistatic cloth-based coated abrasive tool and manufacturing method |
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Address after: No. 8 North Road, Development Zone, High tech Zone, Zibo City, Shandong Province, 255000 Applicant after: Zibo Sangong Taishan Coated Abrasives Co.,Ltd. Address before: 255035 No. 8, North Road, high tech Development Zone, Zibo City, Shandong Province Applicant before: Zibo Riken MT Coated Abrasives Co.,Ltd. |
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