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Preparation method of compound grinding sheet

A technology for grinding sheets and preparation steps, which is applied in the direction of grinding/polishing equipment, abrasive materials, grinding devices, etc., can solve the problems of poor wear resistance and short service life of abrasive sheets, and achieve sharp abrasive grains, strong wear resistance, The effect of high hardness

Inactive Publication Date: 2019-06-21
CHANGZHOU OPTICAL MATERIAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Technical problem to be solved by the present invention: Aiming at the problems of poor wear resistance and short service life of existing abrasive sheets, a preparation method of composite abrasive sheets is provided

Method used

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  • Preparation method of compound grinding sheet

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Embodiment Construction

[0036] In terms of parts by weight, weigh 40-50 parts of aluminum sulfate hydrate, 10-20 parts of urea, 1-3 parts of polyvinyl alcohol, and 60-80 parts of deionized water, and add aluminum sulfate hydrate into deionized water. Stir at a speed of 100~150r / min for 10~15min to obtain aluminum sulfate solution, add polyvinyl alcohol to the aluminum sulfate solution, stir at a speed of 200~300r / min for 30~40min in a water bath at 85~95°C, keep warm, and mix solution, slowly add urea into the mixed solution, and stir at 300~400r / min in a water bath at 85~95°C for 1~2h to obtain a dispersion, put the dispersion in a centrifuge and centrifuge at a speed of 4000~5000r / min Separation for 5-10 minutes, remove the lower solid layer, wash with deionized water for 3-5 times, dry at 120-160°C for 1-2h to obtain the precursor, and calcinate the precursor at 1200-1300°C for 1-2h to obtain Alumina ceramic powder, according to parts by weight, weigh 50~60 parts of alumina ceramic powder, 20~30 p...

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Abstract

The invention relates to a preparation method of a compound grinding sheet, and belongs to the technical field of grinding materials. According to the preparation method disclosed by the invention, the compound grinding sheet is prepared by taking polyurethane modified silicon resin as a material; in the organic silicon resin, a silicon oxygen bond is taken as a main chain, and each of silicon atoms is also connected with an organic group; when the organic silicon resin is heated, a side chain and the organic groups connected onto the silicon atoms can be removed under the action of heat to form a more stable and more heat-resistant silicon oxygen bond, and thereby, good heat stability is given to the compound grinding sheet; in a polyurethane molecule, polyether polyol or polyester polyolis taken as soft segments; the soft segment structures are irregularly curled together to form a continuous phase region; ester bonds or urea bonds are taken as hard segments; the hard segment structures are arranged together to form hard segment domains; the hard segment domains are dispersed in the continuous phase region one by one to form a structure of microphase separation; and the structure of microphase separation is a specific structure in the polyurethane molecule, so that polyurethane has excellent abrasion performance, and the abrasion performance of the compound grinding sheet can be effectively improved.

Description

technical field [0001] The invention relates to a preparation method of a composite abrasive sheet, belonging to the technical field of abrasive materials. Background technique [0002] Abrasive sheet refers to the use of ultra-precision coating technology to uniformly disperse selected micron or nano-sized grinding powder (diamond, silicon carbide, aluminum oxide, silicon oxide, cerium oxide, etc.) The surface of the base material is then processed by a high-precision cutting process. Abrasive sheets are used in a wide range of fields, such as optical communications, micro-motors, and hard disks. For example, the steel paper sand disc currently used in the market, the steel paper sand disc is also called a steel paper grinding disc, a high-speed grinding disc, and a grinding disc. Disc coated abrasives. It has high tensile strength and strong wear resistance. It can be installed on electric or pneumatic angle grinders to derust, deburr, paint and weld various surfaces of...

Claims

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Application Information

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IPC IPC(8): B24D3/00B24D3/28B24D18/00C04B35/10C04B35/622
Inventor 谭辉展
Owner CHANGZHOU OPTICAL MATERIAL
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