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Preparation method of glue-free polishing sheet

A technique for polishing sheets and preparation steps, which is applied in the field of preparation of glue-free polishing sheets, which can solve problems such as aggregation into large particles, poor dispersion of abrasives, and influence on polishing effects, and achieve the effect of improving dispersibility and dispersing performance

Inactive Publication Date: 2020-05-05
常州万博金属构件厂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem mainly solved by the present invention is that the traditional polishing sheet uses resin glue to bond and wrap the abrasive. When polishing, the edges of the wedge-shaped or inclined-plane bare optical fiber section will scratch the resin glue that wraps the abrasive. It leads to the generation of residual glue, which affects the transmission of optical signals, and the dispersion of abrasives is poor. It is easy to gather large particles on the plastic film base belt and affect the polishing effect. A preparation method for glue-free polishing sheets is provided.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The silane coupling agent is: KH-550

[0031] Preparation of composite abrasives:

[0032] Put the bauxite ore in a pulverizer, put it in a planetary ball mill, and carry out wet grinding for 30 minutes with a water-to-material ratio of 1:3 to obtain a pre-abrasive material, and then put it in a vibrating ball mill to continue fine grinding with a power of 100kW After 40 minutes, the suspension was obtained, centrifuged at a speed of 2000r / min, and the lower layer of precipitate was taken out and dried in a vacuum oven with a set temperature of 70°C for 5 hours to obtain an ultrafine powder;

[0033] Disperse the above superfine powder with a sodium hydroxide solution with a mass fraction of 25%, and control the pH to 10.5 to obtain a causticizing dispersion. Put the causticizing dispersion in a stirring reactor and heat it up to 180°C. Under the condition of MPa high pressure, heat preservation and pressure for 2 hours to dissolve impurities, and after filtering out i...

Embodiment 2

[0040] The silane coupling agent is: KH-560

[0041] Preparation of composite abrasives:

[0042] Put the bauxite ore in a pulverizer, put it in a planetary ball mill, and carry out wet grinding for 32 minutes with a water-to-material ratio of 1:3 to obtain pre-abrasive materials, and then put it in a vibrating ball mill to continue fine grinding with a power of 120kW After 45 minutes, the suspension was obtained, centrifuged at a speed of 3000r / min, and the lower layer of precipitate was taken out and dried in a vacuum oven with a set temperature of 75°C for 5.5 hours to obtain an ultra-fine powder;

[0043] Disperse the above superfine powder with a sodium hydroxide solution with a mass fraction of 25%, and control the pH to 10.7 to obtain a causticizing dispersion. Put the causticizing dispersion in a stirring reactor and heat it up to 190°C. Under the condition of MPa high pressure, heat preservation and pressure for 2.5 hours to dissolve impurities, and after filtering o...

Embodiment 3

[0050] The silane coupling agent is: KH-570

[0051] Preparation of composite abrasives:

[0052] Put the bauxite ore in a pulverizer, put it in a planetary ball mill, and carry out wet grinding for 35 minutes with a water-to-material ratio of 1:3 to obtain pre-abrasive materials, and then put it in a vibrating ball mill to continue fine grinding with a power of 150kW After 50 minutes, the suspension was obtained, centrifuged at a speed of 4000r / min, and the lower layer of precipitate was taken out and dried in a vacuum oven with a set temperature of 80°C for 6 hours to obtain an ultrafine powder;

[0053] Disperse the above ultra-fine powder with a sodium hydroxide solution with a mass fraction of 25%, and control the pH to 10.8 to obtain a causticized dispersion. Put the causticized dispersion in a stirred reactor and heat it up to 200°C. Under the condition of MPa high pressure, heat preservation and pressure for 3 hours to dissolve impurities, and after filtering out impu...

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Abstract

The invention discloses a preparation method of a glue-free polishing sheet, and belongs to the technical field of grinding and polishing. A composite abrasive obtained by the invention is rich in sodium meta aluminate and sodium silicate, during the process of preparing a polishing sheet through ultrasonic oscillation reaction, the sodium meta aluminate consumes a large amount of acid in an acetic acid solution to generate aluminum ions, the pH value of the acid solution is improved, aluminum atoms generate, aluminum oxide crystal grains generate under the action of hydrogen peroxide, and spaced and uniformly dispersed abrasive crystal grains are formed on the surface of a PET belt base under the action of a silane coupling agent; a mixed monomer provided by the invention is compose of acrylic acid and maleic anhydride, and under the action of initiator ammonium persulfate, polycarboxylic acid substances with high hydrophilicity can be formed, the polycarboxylic acid substances play akey role in the high dispersion of abrasive during the oscillating reaction process, and are beneficial to improving the dispersion performance of silicon dioxide and aluminum oxide in a resin-free glue system, improving the dispersion of silicon dioxide crystal grains on the surface of a plastic film base belt, the abrasive on the polishing sheet has high dispersion, and the abrasive is not adhered by a resin adhesive.

Description

technical field [0001] The invention discloses a preparation method of a glue-free polishing sheet, which belongs to the technical field of grinding and polishing. Background technique [0002] The polishing sheet is made by mixing nano-scale silicon dioxide particles with high-efficiency adhesives, uniformly coating the surface of polyester film, drying and curing. Since the polishing original particles are fine and the particle size is smaller than the wavelength of visible light, they are evenly distributed to form a transparent or translucent polishing film. It is specially designed and developed for the final ultra-precision polishing of optical fiber connectors. After use, the end face of the connector has no scratches or defects, and the fiber height and reflection attenuation indicators have reached international standards. Just add pure water as a polishing medium when using. During the polishing process, the nano-coating of the polishing film will gradually relea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B24D18/00C08F220/06C08F222/06C09G1/02
CPCB24D18/00C08F220/06C09G1/02C08F222/06
Inventor 谭春容
Owner 常州万博金属构件厂
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