CN107868395A - 树脂电刷及其制备方法 - Google Patents

树脂电刷及其制备方法 Download PDF

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CN107868395A
CN107868395A CN201610857208.4A CN201610857208A CN107868395A CN 107868395 A CN107868395 A CN 107868395A CN 201610857208 A CN201610857208 A CN 201610857208A CN 107868395 A CN107868395 A CN 107868395A
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resin
brush
phenolic resin
weight part
inorganic insulating
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盖浩然
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Qingdao Dong Hao Software Technology Co Ltd
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Abstract

本发明涉及一种树脂电刷及其制备方法,由有机绝缘材料酚醛树脂作为粘合剂,配以无机绝缘材料和导电材料制成,所述酚醛树脂重量份比为30‑40,所述无机绝缘材料重量份比为5‑20,所述导电材料重量份比为40‑65,所述酚醛树脂选用的是热固性和苯胺型的线性大分子结构树脂,经过高温处理后可形成立体的网状结构。本发明同时公布了一种树脂电刷的制备方法,通过电刷材料的品种、配比、颗粒度大小、加工过程中的分散均匀性和加工过程中的方法等技术方案的实施,解决了电位器对电刷的要求必须同时满足外观尺寸、电阻、抗磨系数、抗压强度、平滑系数、碰撞和震动等多项指标的要求,提高了产品的可靠性。

Description

树脂电刷及其制备方法
技术领域
本发明涉及一种电刷及其制备方法,尤其涉及一种树脂电刷及其制备方法。
背景技术
目前电位器产品,尤其涉及航空航天、武器装备等对专用的有机实心电位器、玻璃釉电位器有着非常严格的技术要求,调整电位器的输出电压信号必须非常准确可靠,其技术要求和电位器的电刷紧密相关,所以电位器对电刷的要求必须同时满足外观尺寸、电阻、抗磨系数、抗压强度、平滑系数、碰撞和震动等多项指标的要求。由于指标当中相互影响很大,多项指标要同时达到要求非常困难,比如说电刷本身电阻越小越好,但是电阻小了,强度就受影响变低了。电刷材料的品种、配比、颗粒度大小、加工过程中的分散均匀性和加工过程中的方法等均对技术指标有着影响,解决问题的关键就是能够解决同时满足各项技术指标要求的方案:即材料的优选,配方比的优选和工艺过程的优选等。
发明内容
为解决现有技术中存在的问题,本发明提供了一种树脂电刷及其制备方法,使用有机绝缘材料做粘合剂,选用的是热固性的酚醛树脂,而且使用苯胺型的,它是线性大分子结构,经过高温处理后可形成立体的网状结构而变成不溶不熔,这种材料有优良的电气性能和耐温性,高强度等。在电刷中,用这种材料形成的骨架中可以填充各种需要的无机绝缘材料或导电材料进去,就可以改变电刷的各种性能,极大地提高了产品的可靠性。
本发明所采用的技术方案如下:
一种树脂电刷,由有机绝缘材料酚醛树脂作为粘合剂,配以无机绝缘材料和导电材料制成,所述酚醛树脂重量份比为30-40,所述无机绝缘材料重量份比为5-20,所述导电材料重量份比为40-65。
作为优选,所述酚醛树脂选用的是热固性和苯胺型的线性大分子结构树脂,经过高温处理后可形成立体的网状结构。
作为优选,所述无机绝缘材料为三氧化二铝、二氧化硅和硬质碳酸镁的混合物。
作为优选,所述导电材料为石墨和超导炭黑的混合物。
一种树脂电刷的制备方法,包括以下步骤:
步骤一:将苯胺改型的大分子酚醛树脂加工成细面,颗粒≥500目;
步骤二:将酚醛树脂和无机绝缘材料、导电材料按比例充分干混均匀;
步骤三:按重量比1∶1加入适量有机溶剂进行湿混两小时,变成半固体状态;
步骤四:放入研磨机中进行研磨,颗粒度≤5μ;
步骤五:将研磨好的半固体状态的料放入辊轧机中辊轧;
步骤六:将辊轧好的料在破碎机上加工成颗粒,再在分选筛机进行分选,分选出的颗粒在60-150目之间;
步骤七:将分选的颗粒在自动压机上压制成电刷样品,高温烘烤后测出收缩系数,按收缩系数设计模具,加工产品。
作为优选,步骤三中的有机溶剂为丙酮。
作为优选,步骤五中的辊轧机滚筒要加热到80℃,使其溶剂充分挥发掉。
作为优选,:步骤七中高温烘烤温度为200±5℃,时间为2小时。
本发明的有益效果是:通过电刷材料的品种、配比、颗粒度大小、加工过程中的分散均匀性和加工过程中的方法等技术方案的实施,解决了电位器对电刷的要求必须同时满足外观尺寸、电阻、抗磨系数、抗压强度、平滑系数、碰撞和震动等多项指标的要求。
具体实施方式
以下通过优选实施例对本发明作进一步的详细说明:
首先将苯胺改性的大分子的酚醛树脂(重量份比为30-40),加工成细面(≥500目),然后再和无机绝缘材料包括三氧化二铝、二氧化硅和硬质碳酸镁的混合物(重量份比为5-20),以及导电材料包括石墨和超导炭黑的混合物(重量份比为40-65)按比例放入密闭的高速混料机中,使各种材料在密闭的容器空间内飞起来进行充分的混合均匀。然后将干混均匀的料放入混料机,按重量比1∶1加入有机溶剂(例如丙酮)进行湿混两小时,变成半固体状态,再放入研磨机中研磨15遍后取出,颗粒度≤5μ;将研磨好的半固体状态的料放入辊轧机中辊轧,滚筒要加热到80度左右,辊轧15遍左右后,使其溶剂充分挥发掉。
将辊轧好的料在破碎机上加工成颗粒,再在分选筛机上分选出60-150目之间颗粒备用。然后将料在自动压机上压制成电刷样品,烘烤后测出收缩系数,按收缩系数设计出模具,再出正式产品,产品要在高温下充分烘烤,温度可设定在200±5℃,时间为2小时,使其中的高分子材料结成完整的网状结构,其电刷就变成不溶不熔低电阻高强度的产品,模拟真实使用状态下检测各项指标。

Claims (5)

1.一种树脂电刷,由有机绝缘材料酚醛树脂作为粘合剂,配以无机绝缘材料和导电材料制成,所述酚醛树脂重量份比为30-40,所述无机绝缘材料重量份比为5-20,所述导电材料重量份比为40-65。
2.根据权利要求1所述的树脂电刷,其特征在于:所述酚醛树脂选用的是热固性和苯胺型的线性大分子结构树脂,经过高温处理后可形成立体的网状结构。
3.根据权利要求1所述的树脂电刷,其特征在于:所述无机绝缘材料为三氧化二铝、二氧化硅和硬质碳酸镁的混合物。
4.根据权利要求1所述的树脂电刷,其特征在于:所述导电材料为石墨和超导炭黑的混合物。
5.一种树脂电刷的制备方法,包括以下步骤:
步骤一:将苯胺改型的大分子酚醛树脂加工成细面,颗粒≥500目;
步骤二:将酚醛树脂和无机绝缘材料、导电材料按比例充分干混均匀;
步骤三:按重量比1∶1加入有机溶剂进行湿混两小时,变成半固体状态;
步骤四:放入研磨机中进行研磨,颗粒度≤5μ;
步骤五:将研磨好的半固体状态的料放入辊轧机中辊轧;
步骤六:将辊轧好的料在破碎机上加工成颗粒,再在分选筛机进行分选,分选出的颗粒在60-150目之间;
步骤七:将分选的颗粒在自动压机上压制成电刷样品,高温烘烤后测出收缩系数,按收缩系数设计模具,加工产品。
CN201610857208.4A 2016-09-27 2016-09-27 树脂电刷及其制备方法 Pending CN107868395A (zh)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109943015A (zh) * 2019-04-12 2019-06-28 平顶山正植科技有限公司 超特高压均压环用半导体材料及均压环生产工艺

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109943015A (zh) * 2019-04-12 2019-06-28 平顶山正植科技有限公司 超特高压均压环用半导体材料及均压环生产工艺

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Application publication date: 20180403