EP3418001A1

EP3418001A1 - Coated abrasive net, and manufacturing method thereof

Info

Publication number: EP3418001A1
Application number: EP16910399.1A
Authority: EP
Inventors: Peng Wang; Rongsheng WANG
Original assignee: Jiangsu Fengmang Compound Material Science & Tech Group Co Ltd
Current assignee: Jiangsu Fengmang Compound Material Science & Tech Group Co Ltd
Priority date: 2016-07-25
Filing date: 2016-11-30
Publication date: 2018-12-26
Also published as: WO2018018821A1; EP3418001A4

Abstract

The disclosure provides a net sand coated abrasive tool. The net sand coated abrasive tool comprises a backing material, an adhesive layer and an abrasive layer, wherein the adhesive layer and the abrasive layer are located on one surface of the backing material; the backing material is a flexible knitted or woven fabric having a relatively flat surface and relatively densely arranged longitudinal fibers without obvious holes, and the backing material can be transformed from the flat surface to a porous mesh structure after undergoing lateral stretching under a certain tension condition in a net sand coated abrasive tool manufacturing procedure but not a backing material manufacturing procedure. In the present disclosure, an adhesive is coated on the relatively dense fabric backing material without obvious holes, and after the adhesive is coated or abrasives are coated, the backing material is laterally stretched to form a net; and due to the utilization of the relatively dense backing material without obvious holes, the evenness and flatness of adhesive coating of the backing material can be effectively improved, the difficulty of control on the adhesive coating is reduced, and limitations of the traditional manufacturing method, in which an open backing material is directly used as a base body, are broken through.

Description

TECHNICAL FIELD

The disclosure relates to a coated abrasive tool and a manufacturing method thereof and specifically is a net sand coated abrasive tool and a manufacturing method thereof.

BACKGROUD

Net sand coated abrasive products are special abrasive tools generally using various fiber mesh fabrics as backing materials and bonding abrasives on the backing materials through adhesives, have the excellent chip removing property and are products capable of realizing dust-free grinding currently.
The current traditional manufacturing method of the net sand coated abrasive products is to apply adhesives and abrasives onto various backing materials with meshes, wherein the direct backing material utilizes various open backing materials with meshes, such as fiberglass mesh cloth, nylon mesh cloth, polyester mesh cloth and the like. During manufacturing, due to utilization of the backing materials with meshes, the surface flatness of the net sand coated abrasive products is hard to be guaranteed, and it is of very high demands on adhesive-coating and sand-planting manufacturing processes. Therefore, the relatively higher level of the surface flatness of the net sand coated abrasive products is hard to be realized in the adhesive coating and sand planting processes in the prior art.

SUMMARY

The technical problem to be solved by the present disclosure is how to solve a technical problem of surface flatness and control of a net sand coated abrasive product in the manufacturing procedure.
The technical scheme adopted by the present disclosure to solve the technical problem is:
a net sand coated abrasive tool comprises a backing material, an adhesive layer and an abrasive layer, wherein the adhesive layer and the abrasive layer are located on one surface of the backing material; the backing material is a flexible knitted or woven fabric having a relatively flat surface and relatively densely arranged longitudinal fibers without obvious holes, and the backing material can be transformed from the flat surface to a porous mesh structure after undergoing lateral stretching under a certain tension condition in a net sand coated abrasive tool manufacturing procedure but not a backing material manufacturing procedure.
A manufacturing method of the net sand coated abrasive tool of the present disclosure comprises the following steps:

(1) selecting a flexible knitted or woven fabric having a relatively flat surface and relatively densely arranged longitudinal fibers without obvious holes as a backing material, wherein the backing material can be laterally stretched under a certain tension condition and then is transformed from the flat surface to a porous mesh structure;
(2) applying an adhesive coating to one surface of the backing material, thereby forming a continuous or semi-continuous coating surface; and
(3) carrying out lateral stretching on the backing material before or after applying abrasives on the coating surface, thereby forming a mesh backing material with holes.

Therefore, in the present disclosure, after the relatively dense fabric backing material without obvious holes is coated with an adhesive or is coated with an adhesive and abrasives, the backing material is laterally stretched to form a net; and due to the utilization of the relatively dense backing material without obvious holes, the evenness and flatness of the adhesive coating of the backing material can be effectively improved, the difficulty of control on the adhesive coating is reduced, and limitations of the traditional manufacturing method, in which the backing material directly utilizes a base body per se having holes, are broken through. Thus, it can be seen that in the present disclosure, an implementation manner of forming a net by stretching the backing material in the later period is scientifically used, wherein the traditional backing material per se having the holes is not directly used, but the net is formed by stretching in the later net abrasive product manufacturing procedure, thereby realizing transformation from the traditional nonporous coated abrasive semi-finished or finished product to a porous mesh-structure net abrasive semi-finished or finished product; therefore, the technical problem of surface flatness and control of the net sand coated abrasive product is greatly solved, the surface flatness of the net sand coated abrasive tool is guaranteed, and meanwhile, the production efficiency is improved, which achieves two purposes by one stroke.
The technical scheme further provided by the present disclosure is:

according to the net sand coated abrasive tool, the lateral stretching is carried out before the abrasives are bonded by using the adhesive or is carried out after the abrasives are bonded by using the adhesive.
according to the net sand coated abrasive tool, the lateral stretching is complete once or at least two times.
according to the net sand coated abrasive tool, protruded loops, lines or hooks are arranged on one surface, not including the abrasives, of the backing material and are used for matching with a grinding tool to carry out hook-loop adhesion; the protruded loops, lines or hooks is from the backing material per se, or is formed by bonding a lightweight backing material with protruded loops or lines on the backing material through a binder, or is formed by bonding the protruded loops or lines on the backing material through the binder.
according to the net sand coated abrasive tool, the abrasive layer is further provided with an anti-clogging material layer.

A manufacturing method of the net sand coated abrasive tool comprises the following steps:

(1) selecting a flexible knitted or woven fabric having a relatively flat surface and relatively densely arranged longitudinal fibers without obvious holes as a backing material, wherein the backing material can be laterally stretched under a certain tension condition and then is transformed from the flat surface to a porous mesh structure;
(2) applying an adhesive coating on one surface of the backing material, thereby forming a continuous or semi-continuous coating surface; and
(3) carrying out lateral stretching on the coated backing material, thereby forming a mesh backing material with holes; applying abrasives onto the coating surface of the mesh backing material with holes through an adhesive; and coating a layer of secondary adhesive on the abrasives, thereby forming a net abrasive product after the secondary adhesive is cured.

(1) selecting a flexible knitted or woven fabric having a relatively flat surface and relatively densely arranged longitudinal fibers without obvious holes as a backing material, wherein the backing material can be laterally stretched under a certain tension condition and then is transformed from the flat surface to a porous mesh structure;
(2) applying an adhesive coating on one surface of the backing material, thereby forming a continuous or semi-continuous coating surface; and
(3) uniformly coating a layer of primer adhesive on the coating surface of the coated backing material, and carrying out lateral stretching on the backing material when the primer adhesive is not dried, thereby forming a mesh backing material with holes; and applying abrasives onto the coating surface of the mesh backing material with holes in an electrostatic sand planting manner, and coating a layer of secondary adhesive on the abrasives after the primer adhesive is dried, thereby forming a net abrasive product after the secondary adhesive is cured.

(1) selecting a flexible knitted or woven fabric having a relatively flat surface and relatively densely arranged longitudinal fibers without obvious holes as a backing material, wherein the backing material can be laterally stretched under a certain tension condition and then is transformed from the flat surface to a porous mesh structure;
(2) applying an adhesive coating on one surface of the backing material, thereby forming a continuous or semi-continuous coating surface; and
(3) uniformly coating a layer of primer adhesive on the coating surface of the coated backing material, applying abrasives onto the backing material in an electrostatic sand planting manner, and carrying out lateral stretching on the backing material when the primer adhesive is not completely dried, thereby forming a mesh backing material with holes; and coating a layer of secondary adhesive on the abrasives after the primer adhesive is dried, thereby forming a net abrasive product after the secondary adhesive is cured.

(1) selecting a flexible knitted or woven fabric having a relatively flat surface and relatively densely arranged longitudinal fibers without obvious holes as a backing material, wherein the backing material can be laterally stretched under a certain tension condition and then is transformed from the flat surface to a porous mesh structure;
(2) applying an adhesive coating on one surface of the backing material, thereby forming a continuous or semi-continuous coating surface; and
(3) uniformly coating a layer of primer adhesive on the coating surface of the coated backing material, applying abrasives onto the backing material in an electrostatic sand planting manner, coating a layer of secondary adhesive on the abrasives after the primer adhesive is dried, and carrying out lateral stretching on the backing material when the secondary adhesive is not completely dried, thereby forming a mesh backing material with holes; and after the secondary adhesive is cured, forming a net abrasive product.

In the present disclosure, the raw material utilizes a densely-arranged flexible knitted or woven fabric backing material without obvious holes, and the backing material is laterally stretched once or for multiple times under a certain tension condition so as to form a net after the backing material is impregnated or coated with an adhesive, wherein the backing material may be any known knitted or woven fabrics or conventional fabric materials and includes, but is not limited to, a group consisting of nylon, terylene, acrylon, chinlon, polypropylene, polyethylene, polyurethane, polyamide and combinations thereof.
The abrasives are bonded on the backing material via at least one manner selected from a group consisting of an electrostatic sand planting manner, a gravity sand planting manner and an abrasive-adhesive mixture applying manner. The abrasives may be any known abrasives or conventional materials of abrasive products. The abrasives include one or more members selected from a group consisting of brown corundum alumina, calcined alumina, semi-brittle alumina, white corundum, black corundum, zirconia corundum, sol-gel abrasives, black silicon carbide, green silicon carbide, garnets, quartz sands, glass sands, diamonds, cubic boron nitride, metal grains, plastic grains and combinations thereof.
The adhesive layer comprises an adhesive coating, a primer adhesive, a secondary adhesive and an anti-clogging material layer, and adhesives utilized by the adhesive coating, the primer adhesive, the secondary adhesive and the anti-clogging material layer consist of a binder, a filler, a pigment and a solvent. The binder comprises one or more members selected from a group consisting of water-based latex, such as acrylate emulsion, styrene butadiene latex, nitrile-butadiene latex, vinyl acetate ethylene (VAE) emulsion, polyurethane emulsion and combinations thereof, phenolic resin, such as water-soluble thermosetting phenolic resin, alcohol-soluble thermosetting phenolic resin, thermoplastic phenolic resin and the like, urea-formaldehyde resin, amino resin, polyurethane resin, epoxy resin, alkyd resin and combinations thereof. The filler comprises one or more members selected from a group consisting of calcium carbonate, kaolin, talc, feldspar powder, mica, clay, calcium sulfate, barium sulfate, potassium fluoroaluminate, potassium fluoborate, sodium fluoroaluminate, zinc stearate, calcium stearate and combinations thereof. The pigment comprises one or more members selected from a group consisting of ferric-oxide-series inorganic pigment, organic pigments, dye and combinations thereof. The solvent comprises one or more members selected from a group consisting of water, methyl alcohol, ethyl alcohol, butyl alcohol, acetone, methylbenzene, dimethylbenzene, 2-ethoxyethanol and combinations thereof.
The present disclosure has the following beneficial effects: the raw material does not directly utilize the traditional open backing material but utilizes a relatively-densely-arranged flexible knitted or woven fabric backing material without obvious holes, and is stretched to form a net in the later net abrasive product manufacturing procedure, thereby realizing transformation from the traditional nonporous coated abrasive semi-finished or finished product to a porous mesh-structure net abrasive semi-finished or finished product. The backing material provided by the present disclosure has the flexibility and may be laterally stretched under a certain tension condition, thereby transforming from a densely-arranged flat surface to a porous mesh structure, and the above lateral stretching process is carried out in a net abrasive product manufacturing procedure but not the backing material manufacturing procedure. Therefore, the technical problem of surface flatness and control of the net sand coated abrasive product is greatly solved, the surface flatness of the net sand coated abrasive tool is improved, and meanwhile, the production efficiency is improved.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1a is a structural diagram of a backing material, having a densely-arranged flat surface before undergoing lateral stretching, of the net sand coated abrasive tool of the present disclosure.
FIG. 1b is a structural diagram of the backing material, which is transformed from the densely-arranged flat surface to a porous mesh structure B through lateral stretching, of the net sand coated abrasive tool of the present disclosure.
FIG. 1c is a structural diagram of the backing material, which is transformed from the densely-arranged flat surface A to a porous mesh structure C through lateral stretching, of the net sand coated abrasive tool of the present disclosure.
FIG. 2 is a stereogram of the net sand coated abrasive tool of the present disclosure.
FIG. 3 is a comparison diagram of the backing material, forming a net through lateral stretching, of embodiment 3.
FIG. 4 is a comparison diagram of the backing material, forming a net through lateral stretching, of embodiment 4.
FIG. 5 is a comparison diagram of the backing material, forming a net through lateral stretching, of embodiment 5.
FIG. 6 is a comparison diagram of the backing material, forming a net through lateral stretching, of embodiment 6.

DESCRIPTION OF THE EMBODIMENTS

Embodiment 1

In the embodiment, a net sand coated abrasive tool comprises a backing material, an adhesive layer and an abrasive layer, wherein the adhesive layer and the abrasive layer are located on one surface of the backing material; the backing material is a flexible knitted or woven fabric having a relatively flat surface and relatively densely arranged longitudinal fibers without obvious holes, and the backing material is transformed from the flat surface to a porous mesh structure after undergoing lateral stretching under a certain tension condition in a net sand coated abrasive tool manufacturing procedure but not a backing material manufacturing procedure. As shown in FIG. 1a, FIG. 1b and Fig. 1c, the backing material is transformed from a densely-arranged flat surface A to a porous mesh structure B or C after undergoing lateral stretching; the above lateral stretching process is carried out in a net abrasive product manufacturing procedure but not the backing material manufacturing procedure; the above lateral stretching process may be carried out before or after abrasives are bonded through an adhesive; and the above lateral stretching process may be complete once or be complete after multiple stretching is carried out.
The backing material may be any known knitted or woven fabrics or conventional fabric materials and includes, but is not limited to, a group consisting of nylon, terylene, acrylon, chinlon, polypropylene, polyethylene, polyurethane, polyamide and combinations thereof. The abrasives are bonded on the backing material via at least one manner selected from a group consisting of an electrostatic sand planting manner, a gravity sand planting manner and an abrasive-adhesive mixture applying manner, and the abrasives may be any known abrasives or conventional materials of abrasive products; and the abrasives include one or more members selected from a group consisting of brown corundum alumina, calcined alumina, semi-brittle alumina, white corundum, black corundum, zirconia corundum, sol-gel abrasives, black silicon carbide, green silicon carbide, garnets, quartz sands, glass sands, diamonds, cubic boron nitride, metal grains, plastic grains and combinations thereof. The adhesive layer comprises an adhesive coating, a primer adhesive, a secondary adhesive and an anti-clogging material layer, and adhesives utilized by the adhesive coating, the primer adhesive, the secondary adhesive and the anti-clogging material layer consist of a binder, a filler, a pigment and a solvent, wherein the binder comprises one or more members selected from a group consisting of water-based latex, such as acrylate emulsion, styrene butadiene latex, nitrile-butadiene latex, vinyl acetate ethylene (VAE) emulsion, polyurethane emulsion and combinations thereof, phenolic resin, such as water-soluble thermosetting phenolic resin, alcohol-soluble thermosetting phenolic resin, thermoplastic phenolic resin and the like, urea-formaldehyde resin, amino resin, polyurethane resin, epoxy resin, alkyd resin and combinations thereof; the filler comprises one or more members selected from a group consisting of calcium carbonate, kaolin, talc, feldspar powder, mica, clay, calcium sulfate, barium sulfate, potassium fluoroaluminate, potassium fluoborate, sodium fluoroaluminate, zinc stearate, calcium stearate and combinations thereof; the pigment comprises one or more members selected from a group consisting of ferric-oxide-series inorganic pigment, organic pigments, dye and combinations thereof; and the solvent comprises one or more members selected from a group consisting of water, methyl alcohol, ethyl alcohol, butyl alcohol, acetone, methylbenzene, dimethylbenzene, 2-ethoxyethanol and combinations thereof.
In the embodiment, the raw material does not directly utilize the traditional open backing material but utilizes a relatively-densely-arranged flexible knitted or woven fabric backing material without obvious holes, and is stretched to form a net in the later net abrasive product manufacturing procedure, thereby realizing transformation from the traditional nonporous coated abrasive semi-finished or finished product to a porous mesh-structure net abrasive semi-finished or finished product.

Embodiment 2

According to a net sand coated abrasive tool of the embodiment, protruded loops, lines or hooks are arranged on one surface, not including abrasives, of the net abrasive product of embodiment 1 and are mainly used for carrying out hook-loop adhesion with a grinding tool; the protruded loops, lines or hooks may be from the backing material per se; the protruded loops, lines or hooks may also be formed by bonding a lightweight backing material with protruded loops or lines on the backing material through a binder during post-process; and the protruded loops, lines or hooks may also be formed by bonding the protruded loops or lines on the backing material through the binder during post-process.

Embodiment 3

In the embodiment, a manufacturing method of the net sand coated abrasive tool of embodiment 1 or 2 is provided. The net sand coated abrasive tool 211 is shown in FIG. 2 and FIG. 3. The manufacturing method provided by the embodiment comprises the following steps: using a flexible knitted or woven fabric backing material 210 having densely arranged longitudinal fibers 201 without obvious holes; applying an adhesive coating 204 to one surface of the backing material, thereby forming a continuous or semi-continuous coating surface; carrying out lateral stretching on a coated backing material 204-A, thereby forming a mesh backing material 204-C with holes, as shown in FIG. 3; bonding abrasives 206 on the coating surface of the mesh backing material with holes 203 by using a primer adhesive 205; coating a layer of secondary adhesive 207 on the abrasives, thereby forming a net abrasive product after the secondary adhesive is cured; and in order to improve the grinding property, additionally coating a layer of adhesive containing an anti-clogging material on the surface of the abrasives after the secondary adhesive is coated, thereby forming an anti-clogging layer 208.

Embodiment 4

In the embodiment, a manufacturing method of the net sand coated abrasive tool of embodiment 1 or 2 is provided. The net sand coated abrasive tool 211 is shown in FIG. 2 and FIG. 4. The manufacturing method provided by the embodiment comprises the following steps: using a flexible knitted or woven fabric backing material 210 having densely arranged longitudinal fibers 201 without obvious holes; applying an adhesive coating 204 to one surface of the backing material, thereby forming a continuous or semi-continuous coating surface; uniformly coating a layer of primer adhesive 205 on the coating surface of the backing material, and when the primer adhesive 205 is not dried, carrying out lateral stretching on a backing material 205-A, thereby forming a mesh backing material 205-C with holes 203, as shown in FIG. 4; applying abrasives 206 on the coating surface of the mesh backing material 205-C with holes in an electrostatic sand planting manner; coating a layer of secondary adhesive 207 on the abrasives after the primer adhesive is dried, thereby forming a net abrasive product after the secondary adhesive is cured; and in order to improve the grinding property, additionally coating a layer of adhesive containing an anti-clogging material on the surface of the abrasives after the secondary adhesive is coated, thereby forming an anti-clogging layer 208.

Embodiment 5

In the embodiment, a manufacturing method of the net sand coated abrasive tool of embodiment 1 or 2 is provided. The net sand coated abrasive tool 211 is shown in FIG. 2 and FIG. 5. The manufacturing method provided by the embodiment comprises the following steps: using a flexible knitted or woven fabric backing material 210 having densely arranged longitudinal fibers 201 without obvious holes; applying an adhesive coating 204 to one surface of the backing material, thereby forming a continuous or semi-continuous coating surface; uniformly coating a layer of primer adhesive 205 on the coating surface of the backing material, and then applying abrasives 206 on the backing material in an electrostatic sand planting manner; when the primer adhesive 205 is not completely dried, carrying out lateral stretching on a backing material 206-A, thereby forming a mesh backing material 206-C with holes 203; coating a layer of secondary adhesive 207 on the abrasives after the primer adhesive is dried, thereby forming a net abrasive product after the secondary adhesive is cured; and in order to improve the grinding property, additionally coating a layer of adhesive containing an anti-clogging material on the surface of the abrasives after the secondary adhesive is coated, thereby forming an anti-clogging layer 208.

Embodiment 6

In the embodiment, a manufacturing method of the net sand coated abrasive tool of embodiment 1 or 2 is provided. The net sand coated abrasive tool 211 is shown in FIG. 2 and FIG. 6. The manufacturing method provided by the embodiment comprises the following steps: using a flexible knitted or woven fabric backing material 210 having densely arranged longitudinal fibers 201 without obvious holes; applying an adhesive coating 204 to one surface of the backing material, thereby forming a continuous or semi-continuous coating surface; uniformly coating a layer of primer adhesive 205 on the coating surface of the backing material, and then applying abrasives 206 on the backing material in an electrostatic sand planting manner; coating a layer of secondary adhesive 207 on the abrasives after the primer adhesive is dried, and when the secondary adhesive 207 is not completely dried, carrying out lateral stretching on a backing material 207-A, thereby forming a mesh backing material 207-C with holes 203; forming a net abrasive product after the secondary adhesive is cured; and in order to improve the grinding property, additionally coating a layer of adhesive containing an anti-clogging material on the surface of the abrasives after the secondary adhesive is coated, thereby forming an anti-clogging layer 208.
The present disclosure further can have other implementation manners besides the above embodiments. Any technical schemes formed by using equivalent substitutions or equivalent changes shall fall within the protection scope of the present disclosure.

Claims

A net sand coated abrasive tool, comprising a backing material, an adhesive layer and an abrasive layer, wherein the adhesive layer and the abrasive layer are located on one surface of the backing material; the backing material is a flexible knitted or woven fabric having a relatively flat surface and relatively densely arranged longitudinal fibers without obvious holes, and the backing material can be transformed from the flat surface to a porous mesh structure after undergoing lateral stretching under a certain tension condition in a net sand coated abrasive tool manufacturing procedure but not a backing material manufacturing procedure.
The net sand coated abrasive tool according to claim 1, characterized in that the lateral stretching is carried out before abrasives are bonded by using an adhesive or after the abrasives are bonded by using the adhesive.
The net sand coated abrasive tool according to claim 2, characterized in that the lateral stretching is complete once or at least two times.
The net sand coated abrasive tool according to claim 1, 2 or 3, characterized in that protruded loops, lines or hooks are arranged on one surface, not including the abrasives, of the backing material and are used for matching with a grinding tool to carry out hook-loop adhesion; the protruded loops, lines or hooks is from the backing material per se, or is formed by bonding a lightweight backing material with protruded loops or lines onto the backing material through a binder, or is formed by bonding the protruded loops or lines onto the backing material through the binder.
The net sand coated abrasive tool according to claim 4, characterized in that the abrasive layer is further provided with an anti-clogging material layer.
A manufacturing method of the net sand coated abrasive tool according to claim 1, comprising the following steps:
(1) selecting a flexible knitted or woven fabric having a relatively flat surface and relatively densely arranged longitudinal fibers without obvious holes as a backing material, wherein the backing material can be laterally stretched under a certain tension condition and then is transformed from the flat surface to a porous mesh structure;

(2) applying an adhesive coating on one surface of the backing material, thereby forming a continuous or semi-continuous coating surface; and

(3) carrying out lateral stretching on the backing material before or after applying abrasives on the coating surface, thereby forming a mesh-structure body with holes.
The manufacturing method of the net sand coated abrasive tool according to claim 6, comprising the following steps:
(1) selecting a flexible knitted or woven fabric having a relatively flat surface and relatively densely arranged longitudinal fibers without obvious holes as a backing material, wherein the backing material can be laterally stretched under a certain tension condition and then is transformed from the flat surface to a porous mesh structure;

(2) applying an adhesive coating on one surface of the backing material, thereby forming a continuous or semi-continuous coating surface; and

(3) carrying out lateral stretching on the coated backing material, thereby forming a mesh backing material with holes, applying abrasives onto the coating surface of the mesh backing material with holes through an adhesive, and coating a layer of secondary adhesive on the abrasives, thereby forming a net abrasive product after the secondary adhesive is cured.
The manufacturing method of the net sand coated abrasive tool according to claim 6, comprising the following steps:
(1) selecting a flexible knitted or woven fabric having a relatively flat surface and relatively densely arranged longitudinal fibers without obvious holes as a backing material, wherein the backing material can be laterally stretched under a certain tension condition and then is transformed from the flat surface to a porous mesh structure;

(2) applying an adhesive coating on one surface of the backing material, thereby forming a continuous or semi-continuous coating surface; and

(3) uniformly coating a layer of primer adhesive on the coating surface of the coated backing material, and carrying out lateral stretching on the backing material when the primer adhesive is not dried, thereby forming a mesh backing material with holes; and applying abrasives onto the coating surface of the mesh backing material with holes in an electrostatic sand planting manner, and coating a layer of secondary adhesive on the abrasives after the primer adhesive is dried, thereby forming a net abrasive product after the secondary adhesive is cured.
The manufacturing method of the net sand coated abrasive tool according to claim 6, comprising the following steps:
(1) selecting a flexible knitted or woven fabric having a relatively flat surface and relatively densely arranged longitudinal fibers without obvious holes as a backing material, wherein the backing material can be laterally stretched under a certain tension condition and then is transformed from the flat surface to a porous mesh structure;

(2) applying an adhesive coating on one surface of the backing material, thereby forming a continuous or semi-continuous coating surface; and

(3) uniformly coating a layer of primer adhesive on the coating surface of the coated backing material, applying abrasives onto the backing material in an electrostatic sand planting manner, and carrying out lateral stretching on the backing material when the primer adhesive is not completely dried, thereby forming a mesh backing material with holes; and coating a layer of secondary adhesive on the abrasives after the primer adhesive is dried, thereby forming a net abrasive product after the secondary adhesive is cured.
The manufacturing method of the net sand coated abrasive tool according to claim 6, comprising the following steps:
(1) selecting a flexible knitted or woven fabric having a relatively flat surface and relatively densely arranged longitudinal fibers without obvious holes as a backing material, wherein the backing material can be laterally stretched under a certain tension condition and then is transformed from the flat surface to a porous mesh structure;

(2) applying an adhesive coating on one surface of the backing material, thereby forming a continuous or semi-continuous coating surface; and

(3) uniformly coating a layer of primer adhesive on the coating surface of the coated backing material, applying abrasives onto the backing material in an electrostatic sand planting manner, coating a layer of secondary adhesive on the abrasives after the primer adhesive is dried, and carrying out lateral stretching on the backing material when the secondary adhesive is not completely dried, thereby forming a mesh backing material with holes; and after the secondary adhesive is cured, forming a net abrasive product.