High-temperature-resistant grinding sheet and preparation method thereof

By introducing a modified polyimide resin matrix, nano-isolator and high-melting-point metal powder into the grinding sheet, combined with a multi-stage hot pressing curing process, an inert coating and fiber-reinforced structure are formed, which solves the problem of failure of the bonding layer of the grinding sheet in a high-temperature environment and achieves high-strength and long-life grinding performance.

CN120645144APending Publication Date: 2025-09-16ZHENJIANG TIANZHAO GRINDING APP CO LTD
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Patent Information

Application Number
CN202510511339.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-23
Publication Date
2025-09-16

AI Technical Summary

Technical Problem

Existing grinding discs are prone to failure of the bonding layer due to the microscopic chemical reaction between metal fillers and resin binders in high temperature environments, resulting in abrasive shedding, peeling or embrittlement of the bonding layer, affecting the processing quality and service life, and it is difficult to maintain a stable structure and sharpness under multiple complex factors.

Method used

High-melting-point metal powder, nano-scale interface isolation agent, high-temperature resistant abrasive and functional additives are introduced into the modified polyimide resin matrix. Through a multi-stage hot pressing curing process, an inert coating is formed to block chemical reactions. The high thermal conductivity metal powder is combined with a fiber-reinforced structure to improve the overall toughness and heat resistance.

Benefits of technology

It achieves high-strength and long-life grinding performance in an environment of 300-500°C, maintains the stability of the grinding sheet under high-speed rotation and thermal shock conditions, and improves the safety and economy of high-temperature grinding.

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Abstract

The invention discloses a high-temperature-resistant grinding sheet and a preparation method thereof, and relates to the technical field of high-temperature-resistant grinding sheets, high-melting-point metal powder, a nanoscale interface separant, a high-temperature-resistant grinding material and a functional additive are introduced into a modified polyimide resin matrix, and a multi-section hot-pressing curing process is adopted, so that the high-temperature-resistant grinding sheet is prepared. And high-strength and long-service-life grinding under the environment of 300-500 DEG C is realized. The nano separant can generate an inert coating on the surface of a metal filler in situ at a high temperature, so that a micro-chemical reaction between a resin degradation product and active metal is blocked, and the stripping and carbonization risks of a bonding layer are remarkably reduced; meanwhile, the high-thermal-conductivity metal powder and the fiber reinforced structure can synergistically disperse friction heat and improve the overall toughness, early falling of the abrasive and structural cracking are avoided, and excellent performance can still be kept under the conditions of multiple thermal shock and high-speed rotation.
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