Preparation process of sharp ceramic abrasive cloth for louver disc

Abstract

The present application relates to the technical field of coated abrasive, and particularly relates to a preparation process of sharp ceramic abrasive cloth for louver disc. The technical points are as follows: S1, pretreatment of the base body; S2, unwinding treatment of the base body; S3, continuous roll coating of the base body surface with a bottom glue layer; S4, sand implantation on the bottom glue layer and pre-drying; S5, continuous roll coating of the bottom glue layer with a glue layer and drying; S6, solidification after hot winding; S7, kneading and humidification treatment; S8, continuous roll coating of the base body with a functional coating and drying; S9, normal temperature winding; S10, inspection and winding separation; wherein, the pretreatment of the base body is to immerse the base material in a urea-formaldehyde-phenol-formaldehyde-polyvinyl alcohol-latex-coupling agent modified water solution resin, and then heat to 150-250 DEG C for drying and solidification, and then directly cool to below 90 DEG C. The abrasive cloth provided by the present application has higher grinding efficiency and sharper grinding, and the manufacturing process of the abrasive cloth is stable and reliable.

Description

Technical Field

[0001] This invention relates to the field of coated abrasive technology, specifically to a preparation process for a sharp ceramic abrasive cloth for louvered discs. Background Technology

[0002] Currently, power tools such as angle grinders are convenient and efficient, and are widely used in workpiece processing. The general-purpose louvered discs on the market are usually made of brown corundum and high-temperature calcined abrasives. Although they are used in large quantities, they are not efficient enough for hard-to-grind metals such as stainless steel, and the base cloth has poor tear resistance, so the louvered discs need to be replaced frequently during grinding.

[0003] In view of the defects of the existing louvered discs, the inventor, based on years of rich experience and professional knowledge in this field, combined with theoretical analysis and research and innovation, has developed a preparation process for a sharp ceramic abrasive cloth for louvered discs. Summary of the Invention

[0004] The purpose of this invention is to develop a manufacturing process for a sharp ceramic abrasive cloth for louvered discs, employing a high-fiber-content cloth base and corresponding brittleness treatment technology: using a cloth base with ≥50% chemical fiber content and 200-350 g / m³. 2 The substrate, after resin infiltration treatment, high temperature treatment at 150-250℃ and rapid cooling process, can obtain a matrix with high adhesion performance. The abrasive cloth made from this matrix has good brittleness and cutting performance.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0006] The present invention provides a manufacturing process for a sharp ceramic abrasive cloth for louvered discs, comprising the following steps:

[0007] S1. Pretreatment of the substrate;

[0008] S2. Unwind and print the substrate.

[0009] S3. Continuously roll-coat the base layer onto the substrate surface;

[0010] S4. Apply sand to the base layer and pre-dry;

[0011] S5. Continuous roller coating and drying;

[0012] S6. Cured after hot winding;

[0013] S7. Kneading and moisturizing treatment;

[0014] S8. Continuous roll coating of functional coating, followed by drying;

[0015] S9. After being wound at room temperature;

[0016] S10, Inspection and Division;

[0017] The pretreatment of the substrate involves immersing the substrate in a urea-formaldehyde-phenol-polyvinyl alcohol-latex-coupling agent modified aqueous solution resin, heating it to 150-250℃ for drying and curing, and then directly cooling it to below 90℃.

[0018] In this invention, high-temperature treatment at 150–250°C and rapid cooling process can improve the crystal structure of chemical fibers, increase strength and enhance brittleness, and combined with resin penetration treatment, ensure the corresponding bonding performance.

[0019] Furthermore, the matrix uses a base material with a chemical fiber content of ≥50% and a specific gravity of 200-350 g / m³. 2 .

[0020] Furthermore, based on parts by weight, the urea-formaldehyde-phenol-polyvinyl alcohol-latex-coupling agent modified water-soluble resin comprises the following components: 8-10 parts of water-soluble urea-formaldehyde resin, 10-15 parts of water-soluble phenol-formaldehyde resin, 5-8 parts of polyvinyl alcohol, 10-15 parts of latex, 3-5 parts of coupling agent, and 20-40 parts of polyacrylic acid resin.

[0021] Furthermore, the adhesives for the primer and the topcoat, calculated by weight, include the following components: 5-20 parts of waterborne epoxy resin, 60-80 parts of water-soluble phenolic resin, 0.5-1 part of silicone defoamer, 3-5 parts of polyether polymeric surfactant, and 15-60 parts of filler.

[0022] Furthermore, the abrasive is one or a mixture of any of the following: ceramic alumina, zirconium corundum, calcined alumina, silicon carbonitride, or ceramic alumina, wherein it contains at least ceramic alumina.

[0023] Furthermore, the material of the functional coating, calculated by weight, includes the following components: 0.1 to 5 parts wetting agent, 0.1 to 5 parts dispersant, 2 to 3 parts pigment, 5 to 30 parts solvent, 20 to 80 parts lubricating filler, 5 to 20 parts ceramic powder, 0.2 to 0.5 parts defoamer, and 20 to 70 parts adhesive.

[0024] Furthermore, the wetting agent is any one of sulfonated oil, polyethylene oxide alkyl ether, or sorbitan fatty acid ester.

[0025] Furthermore, the ceramic powder is any one or a mixture of several of zirconium corundum, silicon carbide, silicon nitride, chromium nitride, or chromium carbide, with a particle size <500 nm.

[0026] Furthermore, timed heat dissipation is employed in step S7. This invention controls the color consistency and vibrancy of the product before and after the inner and outer rolls through a process of "continuous roller coating, programmed temperature control, hot winding, and timed heat dissipation," while also providing excellent high-temperature resistance and wear resistance in applications.

[0027] Furthermore, in step S7: a combination of 90° kneading and two 45° kneading processes is used in mechanical kneading, wherein the water content is ≤20g / m³. 2 After mechanical kneading, the curl degree is ≤35mm.

[0028] In summary, the present invention has the following beneficial effects:

[0029] This invention provides a ceramic abrasive cloth product with higher grinding efficiency and sharper grinding for louvered disc applications. The invention studies and experiments on the base cloth and its brittle treatment process, ceramic abrasive, heating and heat dissipation process for functional coating and colored appearance, thickness detection and evaluation methods, etc., to ensure that the manufacturing process of the abrasive cloth is stable and reliable, and that its application performance can meet the goals of increasing the life of louvered discs, reducing replacement frequency and waste. Detailed Implementation

[0030] To further illustrate the technical means and effects adopted by the present invention to achieve the intended purpose, the specific implementation method, features and effects of the preparation process of a sharp ceramic abrasive cloth for louvered discs proposed according to the present invention are described in detail below.

[0031] Example 1

[0032] The preparation process of the sharp ceramic abrasive cloth for louvered discs provided in this embodiment includes the following process steps:

[0033] S1. Pre-treat the matrix by immersing it in resin and then drying it continuously at 250°C, followed by direct cooling to 70°C and holding for 3 hours.

[0034] S2. Unwind the substrate;

[0035] S3. Continuously roll-coat the base layer onto the substrate surface;

[0036] S4. Apply ceramic alumina as abrasive to the base adhesive layer, then apply sand and pre-dry.

[0037] S5. Continuous roller coating and drying at 80℃ for 30 minutes;

[0038] S6. Cured after hot winding;

[0039] S7. The mechanical kneading process combines 90° kneading with two 45° kneading operations, with a water content ≤20g / m³. 2After mechanical kneading, the curl degree is ≤35mm;

[0040] S8, continuous roller functional coating, pre-dry at 60℃ for 10 min;

[0041] S9. After being wound at room temperature;

[0042] S10, Inspection and Division.

[0043] The matrix uses a base material with a chemical fiber content of ≥50% and a specific gravity of 280g / m³. 2 .

[0044] The resin, by weight, is a urea-formaldehyde-phenol-polyvinyl alcohol-latex-coupling agent modified water-soluble resin, comprising the following components by weight: 10 parts water-soluble urea-formaldehyde resin, 15 parts water-soluble phenol-formaldehyde resin, 8 parts polyvinyl alcohol, 15 parts latex, 5 parts coupling agent, and 40 parts polyacrylic acid resin.

[0045] The adhesives for the base layer and the top layer, by weight, include the following components: 20 parts water-based epoxy resin, 60 parts water-soluble phenolic resin, 0.5 parts silicone defoamer, 3 parts polyether polymeric surfactant, and 25 parts filler.

[0046] The material of the functional coating, by weight, includes the following components: 5 parts sulfonated oil, 0.5 parts dispersant, 3 parts pigment, 30 parts solvent, 20 parts lubricating filler, 20 parts ceramic powder, 0.5 parts defoamer, and 40 parts adhesive.

[0047] Example 2

[0048] The preparation process of the sharp ceramic abrasive cloth for louvered discs provided in this embodiment includes the following process steps:

[0049] S1. Pre-treat the matrix by immersing it in resin and then drying it continuously at 250°C, followed by direct cooling to 85°C and holding for 3 hours.

[0050] S2. Unwind the substrate;

[0051] S3. Continuously roll-coat the base layer onto the substrate surface;

[0052] S4. Apply ceramic alumina as abrasive to the base adhesive layer, then apply sand and pre-dry.

[0053] S5. Continuous roller coating and drying at 80℃ for 30 minutes;

[0054] S6. Cured after hot winding;

[0055] S7. The mechanical kneading process combines 90° kneading with two 45° kneading operations, with a water content ≤20g / m³. 2 After mechanical kneading, the curl degree is ≤35mm;

[0056] S8, continuous roller functional coating, pre-dry at 60℃ for 10 min;

[0057] S9. After being wound at room temperature;

[0058] S10, Inspection and Division.

[0059] The matrix uses a base material with a chemical fiber content of ≥50% and a specific gravity of 350g / m³. 2 .

[0060] The resin, by weight, is a urea-formaldehyde-phenol-polyvinyl alcohol-latex-coupling agent modified water-soluble resin, comprising the following components by weight: 10 parts water-soluble urea-formaldehyde resin, 15 parts water-soluble phenol-formaldehyde resin, 8 parts polyvinyl alcohol, 15 parts latex, 5 parts coupling agent, and 30 parts polyacrylic acid resin.

[0061] The adhesives for the base layer and the top layer, by weight, include the following components: 80 parts water-soluble phenolic resin, 10 parts water-based epoxy resin, 30 parts filler, 5 parts polyether polymeric surfactant, and 1 part silicone defoamer.

[0062] The materials for the functional coating, calculated by weight, include the following components: 5 parts polyoxyethylene alkyl ether, 5 parts dispersant, 2 parts pigment, 10 parts solvent, 20 parts lubricating filler, 15 parts ceramic powder, 0.2 parts defoamer, and 35 parts adhesive.

[0063] Example 3

[0064] The preparation process of the sharp ceramic abrasive cloth for louvered discs provided in this embodiment includes the following process steps:

[0065] S1. Pre-treat the matrix by immersing it in resin and then drying it continuously at 250°C, followed by direct cooling to 65°C and holding for 3 hours.

[0066] S2. Unwind the substrate;

[0067] S3. Continuously roll-coat the base layer onto the substrate surface;

[0068] S4. Apply ceramic alumina as abrasive to the base adhesive layer, then apply sand and pre-dry.

[0069] S5. Continuous roller coating and drying at 80℃ for 30 minutes;

[0070] S6. Cured after hot winding;

[0071] S7. The mechanical kneading process combines 90° kneading with two 45° kneading operations, with a water content ≤20g / m³. 2 After mechanical kneading, the curl degree is ≤35mm;

[0072] S8, continuous roller functional coating, pre-dry at 60℃ for 10 min;

[0073] S9. After being wound at room temperature;

[0074] S10, Inspection and Division.

[0075] The matrix uses a base material with a chemical fiber content of ≥70% and a specific gravity of 350g / m³. 2 .

[0076] The resin, by weight, is a urea-formaldehyde-phenol-polyvinyl alcohol-latex-coupling agent modified water-soluble resin, comprising the following components by weight: 10 parts water-soluble urea-formaldehyde resin, 12 parts water-soluble phenol-formaldehyde resin, 6 parts polyvinyl alcohol, 11 parts latex, 3 parts coupling agent, and 25 parts polyacrylic acid resin.

[0077] The adhesives for the base layer and the top layer, by weight, include the following components: 72 parts water-soluble phenolic resin, 15 parts water-based epoxy resin, 25 parts filler, 5 parts polyether polymeric surfactant, and 0.5 parts silicone defoamer.

[0078] The materials for the functional coating, calculated by weight, include the following components: 5 parts sorbitan fatty acid ester, 2 parts dispersant, 3 parts pigment, 20 parts solvent, 43 parts lubricating filler, 18 parts ceramic powder, 0.4 parts defoamer, and 65 parts adhesive.

[0079] Comparative Example 1

[0080] The preparation process of the sharp ceramic abrasive cloth for louvered discs provided in this embodiment includes the following process steps:

[0081] S1. Pre-treat the matrix by immersing it in resin and then removing it and drying it continuously at 250°C.

[0082] S2. Unwind the substrate;

[0083] S3. Continuously roll-coat the base layer onto the substrate surface;

[0084] S4. Apply ceramic alumina as abrasive to the base adhesive layer, then apply sand and pre-dry.

[0085] S5. Continuous roller coating and drying at 80℃ for 30 minutes;

[0086] S6. Cured after hot winding;

[0087] S7. The mechanical kneading process combines 90° kneading with two 45° kneading operations, with a water content ≤20g / m³. 2 After mechanical kneading, the curl degree is ≤35mm;

[0088] S8, continuous roller functional coating, pre-dry at 60℃ for 10 min;

[0089] S9. After being wound at room temperature;

[0090] S10, Inspection and Division.

[0091] The matrix uses a base material with a chemical fiber content of ≥50% and a specific gravity of 280g / m³. 2 .

[0092] The resin, by weight, is a urea-formaldehyde-phenol-polyvinyl alcohol-latex-coupling agent modified water-soluble resin, comprising the following components by weight: 10 parts water-soluble urea-formaldehyde resin, 15 parts water-soluble phenol-formaldehyde resin, 8 parts polyvinyl alcohol, 15 parts latex, 5 parts coupling agent, and 40 parts polyacrylic acid resin.

[0093] The adhesives for the base layer and the top layer, by weight, include the following components: 20 parts water-based epoxy resin, 60 parts water-soluble phenolic resin, 0.5 parts silicone defoamer, 3 parts polyether polymeric surfactant, and 25 parts filler.

[0094] The material of the functional coating, by weight, includes the following components: 5 parts sulfonated oil, 0.5 parts dispersant, 3 parts pigment, 30 parts solvent, 20 parts lubricating filler, 20 parts ceramic powder, 0.5 parts defoamer, and 40 parts adhesive.

[0095] Performance testing

[0096] The test results of the above embodiments and comparative examples are shown in Table 1 below.

[0097] Table 1. Performance test results of each embodiment.

[0098] project Example 1 Example 2 Example 3 Comparative Example 1 Radial breaking strength N / 5cm 1458 1453 1447 892 Latitudinal fracture strength N / 5cm 652 661 645 386 Radial elongation at break / % 15.4 14.2 13.7 23.2 latitudinal breaking elongation / % 19.8 21.3 18.9 32.5

[0099] A comparison of the data from Example 1 and Comparative Example 1 shows that the matrix material provided by the present invention can achieve a matrix with high adhesion performance, and the abrasive cloth made from this matrix has good brittleness and cutting performance.

[0100] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been shown above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A manufacturing process for a sharp ceramic abrasive cloth for louvered discs, characterized in that, The following steps are included: S1. Pretreatment of the substrate; S2. Unwind and print the substrate. S3. Continuously roll-coat the base layer onto the substrate surface; S4. Apply sand to the base layer and pre-dry; S5. Continuous roller coating and drying; S6. Cured after hot winding; S7. Kneading and moisturizing treatment; S8. Continuous roll coating of functional coating, followed by drying; S9. After being wound at room temperature; S10, Inspection and Division; The pretreatment of the substrate involves immersing the substrate in a urea-formaldehyde-phenol-polyvinyl alcohol-latex-coupling agent modified water-soluble resin, heating it to 150~250℃ for drying and curing, and then directly cooling it to below 90℃. The matrix is ​​made of a base material with a chemical fiber content of ≥50% and a specific gravity of 200~350g / m³. 2 ; The urea-formaldehyde-phenol-polyvinyl alcohol-latex-coupling agent modified water-soluble resin comprises the following components in parts by weight: 8-10 parts of water-soluble urea-formaldehyde resin, 10-15 parts of water-soluble phenol-formaldehyde resin, 5-8 parts of polyvinyl alcohol, 10-15 parts of latex, 3-5 parts of coupling agent, and 20-40 parts of polyacrylic acid resin.

2. The preparation process of a sharp ceramic abrasive cloth for louvered discs according to claim 1, characterized in that, The adhesives for the base layer and the top layer, by weight, include the following components: 5-20 parts of waterborne epoxy resin, 60-80 parts of water-soluble phenolic resin, 0.5-1 part of silicone defoamer, 3-5 parts of polyether polymeric surfactant, and 15-60 parts of filler.

3. The preparation process of a sharp ceramic abrasive cloth for louvered discs according to claim 1, characterized in that, In step S4, the abrasive used for planting sand on the base layer is one or a mixture of several of ceramic alumina, zirconium corundum, calcined alumina, silicon carbonitride, or ceramic alumina, wherein it contains at least ceramic alumina.

4. The preparation process of a sharp ceramic abrasive cloth for louvered discs according to claim 1, characterized in that, The material of the functional coating, calculated by weight, includes the following components: 0.1-5 parts wetting agent, 0.1-5 parts dispersant, 2-3 parts pigment, 5-30 parts solvent, 20-80 parts lubricating filler, 5-20 parts ceramic powder, 0.2-0.5 parts defoamer, and 20-70 parts adhesive.

5. The preparation process of a sharp ceramic abrasive cloth for louvered discs according to claim 4, characterized in that, The wetting agent is any one of sulfonated oil, polyethylene oxide alkyl ether, or sorbitol fatty acid ester.

6. The preparation process of a sharp ceramic abrasive cloth for louvered discs according to claim 4, characterized in that, The ceramic powder is any one or a mixture of several of zirconium corundum, silicon carbide, silicon nitride, chromium nitride, or chromium carbide, with a particle size of <500nm.

7. The preparation process of a sharp ceramic abrasive cloth for louvered discs according to claim 4, characterized in that, In step S7, timed heat dissipation is used.

8. The preparation process of a sharp ceramic abrasive cloth for louvered discs according to claim 7, characterized in that, In step S7: a combination of 90° kneading and two 45° kneading operations is used in mechanical kneading, wherein the water content is ≤20g / m³. 2 After mechanical kneading, the curl degree is ≤35mm.