Coated abrasive tool and production method thereof

A technology of coating abrasives and abrasives, which is applied in the direction of grinding/polishing equipment, abrasives, grinding devices, etc., and can solve the problems of short service life and fast wear

Active Publication Date: 2015-09-09
清远市百优研磨材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although cloth-based abrasives have certain advantages, they wear out quickly during use and have a short service life

Method used

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  • Coated abrasive tool and production method thereof
  • Coated abrasive tool and production method thereof
  • Coated abrasive tool and production method thereof

Examples

Experimental program
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preparation example Construction

[0056] In the present invention, the binder preferably includes 40-60 parts of modified polyamide, more preferably 45-55 parts. In the present invention, described modified polyamide is preferably nitrile modified polyamide, and the preparation method of described modified polyamide preferably comprises the following steps:

[0057] Pre-vulcanized butyronitrile and polyamide with an amine value of 250 mg KOH / g to 350 mg KOH / g are grafted to obtain a modified polyamide;

[0058] The number average molecular weight of the polyamide is 800-1600.

[0059] The present invention has no special requirements on the specific method for obtaining the presulfurized nitrile butyronitrile, and the presulfurization method of butyronitrile known to those skilled in the art can be used. In an embodiment of the present invention, the pre-vulcanization of the nitrile rubber is specifically: adding 2wt% of sulfur vulcanizing agent, 0.5wt% of activator ZnO, 1.5wt% of accelerator benzothiazole sulf...

Embodiment 1

[0096] Mix 90 parts of polyurethane resin with an elastic modulus of 30, 80 parts of N,N dimethylformamide solvent, 20 parts of wood flour, 0.1 part of defoamer and 0.1 part of leveling agent to obtain a mixed solution.

[0097] The obtained mixed solution was dispersed on a high-speed disperser at a speed of 1000 rpm for 20 minutes; then the dispersed mixed solution was defoamed by a vacuum machine.

[0098] Coat the above-mentioned mixed solution after degassing on the TC cloth base with a fluffed fabric density of 60*120, and the coating amount is 180g / m 2 , the fluff coverage area of ​​the cloth base is 85% of the total area of ​​the cloth base, and the fluff length is about 2mm.

[0099] The cloth base coated with the mixed solution is placed in clear water to form a phase-separated film to obtain a porous film.

[0100] Add 2wt% of sulfur vulcanizing agent, 0.5wt% of activator ZnO, 1.5wt% of accelerator benzothiazole sulfide and 5wt% of solvent nitropropane to nitrile r...

Embodiment 2

[0107] Mix 100 parts of polyurethane resin with an elastic modulus of 50, 100 parts of N,N dimethylformamide solvent, 30 parts of wood flour, 1 part of defoamer and 1 part of leveling agent to obtain a mixed solution.

[0108] The obtained mixed solution was dispersed on a high-speed disperser at a speed of 1200 rpm for 40 minutes. Then the dispersed mixed solution is defoamed by a vacuum machine.

[0109] Coat the above-mentioned defoamed mixed solution on the TC cloth base with a fluffed fabric density of 70*130, and the coating amount is 240g / m 2 , the fluff covering area of ​​the cloth base is 90% of the total area of ​​the cloth base, and the fluff length is about 2mm.

[0110] The cloth base coated with the mixed solution is placed in clear water to form a phase-separated film to obtain a porous film.

[0111] Add 2wt% of sulfur vulcanizing agent, 0.5wt% of activator ZnO, 1.5wt% of accelerator benzothiazole sulfide and 5wt% of solvent nitropropane to nitrile rubber, st...

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Abstract

The invention provides a coated abrasive tool comprising a base material layer, binding agent and an abrasive material. The coated abrasive tool is characterized in that the base material layer is a porous film; the porous film is obtained by applying a mixed solution of polyurethane resin, wood powder, defoaming agent, flatting agent and N, N-dimethylformamide to the surface of a fluffy cloth base and subjecting the cloth base to phase splitting and film forming in coagulating bath. The coated abrasive tool has the advantages that the coated abrasive tool wears slowly during use, service life is long, flex resistance, flexibility, elasticity and tensile strength are high and precision production requirements can be met.

Description

technical field [0001] The invention relates to the technical field of abrasive tools, in particular to a coated abrasive and a preparation method thereof. Background technique [0002] Coated abrasives refer to abrasives that use adhesives to adhere abrasives to flexible substrates, and are called universal abrasive tools. Coated abrasives are mainly used in the grinding, polishing, wire drawing and other processes of various metal and non-metal workpieces to improve the surface treatment quality of the workpiece. Coated abrasives not only have a wide processing range and high grinding efficiency, but also can achieve high dimensional accuracy and low surface roughness. [0003] The three major elements of coated abrasives are abrasive, binder and matrix. Abrasives are responsible for grinding workpieces, and their softness, hardness, and particle size can show different surface effects, such as the thickness of lines and the size of smoothness. The binder is responsible...

Claims

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Application Information

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IPC IPC(8): B24D11/00B24D18/00
CPCB24D11/001B24D11/02
Inventor 薛建成周建飞陈海峰薛建洪
Owner 清远市百优研磨材料有限公司
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