CN108441128A - 一种电子变压器专用绝缘胶带基材及其制备方法 - Google Patents
一种电子变压器专用绝缘胶带基材及其制备方法 Download PDFInfo
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- 239000000853 adhesive Substances 0.000 title claims abstract description 39
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 39
- 238000002955 isolation Methods 0.000 title claims abstract description 39
- 238000002360 preparation method Methods 0.000 title claims description 12
- 239000000835 fiber Substances 0.000 claims abstract description 61
- 239000010902 straw Substances 0.000 claims abstract description 54
- 241000209140 Triticum Species 0.000 claims abstract description 47
- 235000021307 Triticum Nutrition 0.000 claims abstract description 47
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000012760 heat stabilizer Substances 0.000 claims abstract description 33
- 239000004014 plasticizer Substances 0.000 claims abstract description 33
- 239000004642 Polyimide Substances 0.000 claims abstract description 31
- 229920005549 butyl rubber Polymers 0.000 claims abstract description 31
- 229920001721 polyimide Polymers 0.000 claims abstract description 31
- 229920002367 Polyisobutene Polymers 0.000 claims abstract description 30
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 26
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 26
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 26
- 229920002545 silicone oil Polymers 0.000 claims abstract description 26
- 239000008117 stearic acid Substances 0.000 claims abstract description 26
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 claims abstract description 26
- 229960001763 zinc sulfate Drugs 0.000 claims abstract description 26
- 229910000368 zinc sulfate Inorganic materials 0.000 claims abstract description 26
- 229910021389 graphene Inorganic materials 0.000 claims abstract description 24
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000002994 raw material Substances 0.000 claims abstract description 21
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 18
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 18
- VTYYLEPIZMXCLO-UHFFFAOYSA-L calcium carbonate Substances [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 17
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- 150000001875 compounds Chemical class 0.000 claims description 15
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 14
- 238000013329 compounding Methods 0.000 claims description 14
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- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 10
- 229910052791 calcium Inorganic materials 0.000 claims description 10
- 239000011575 calcium Substances 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 9
- 239000002105 nanoparticle Substances 0.000 claims description 9
- 239000001736 Calcium glycerylphosphate Substances 0.000 claims description 8
- UHHRFSOMMCWGSO-UHFFFAOYSA-L calcium glycerophosphate Chemical compound [Ca+2].OCC(CO)OP([O-])([O-])=O UHHRFSOMMCWGSO-UHFFFAOYSA-L 0.000 claims description 8
- 229940095618 calcium glycerophosphate Drugs 0.000 claims description 8
- 235000019299 calcium glycerylphosphate Nutrition 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- ZPEJZWGMHAKWNL-UHFFFAOYSA-L zinc;oxalate Chemical compound [Zn+2].[O-]C(=O)C([O-])=O ZPEJZWGMHAKWNL-UHFFFAOYSA-L 0.000 claims description 8
- VSGNNIFQASZAOI-UHFFFAOYSA-L calcium acetate Chemical class [Ca+2].CC([O-])=O.CC([O-])=O VSGNNIFQASZAOI-UHFFFAOYSA-L 0.000 claims description 7
- 235000011092 calcium acetate Nutrition 0.000 claims description 7
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- 150000001336 alkenes Chemical class 0.000 claims 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims 1
- -1 graphite alkene Chemical class 0.000 claims 1
- 239000007800 oxidant agent Substances 0.000 claims 1
- 230000001590 oxidative effect Effects 0.000 claims 1
- 229910052760 oxygen Inorganic materials 0.000 claims 1
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- 239000012752 auxiliary agent Substances 0.000 abstract description 6
- 229910001385 heavy metal Inorganic materials 0.000 abstract description 6
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 239000005038 ethylene vinyl acetate Substances 0.000 abstract description 3
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 abstract description 3
- 150000005846 sugar alcohols Polymers 0.000 description 6
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical compound CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
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- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- LCJHLOJKAAQLQW-UHFFFAOYSA-N acetic acid;ethane Chemical compound CC.CC(O)=O LCJHLOJKAAQLQW-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
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- 150000002736 metal compounds Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 235000012222 talc Nutrition 0.000 description 1
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Abstract
本发明公开了一种电子变压器专用绝缘胶带基材,包括如下重量份的原料:聚酸亚胺20~30份、乙烯‑乙酸乙烯酯共聚物18~32份、丁基橡胶5~9份、聚异丁烯9~14份、纳米碳酸钙3~6份、超细滑石粉3~7份、改性麦秆纤维3~6份、硫酸锌2~4份、甲基硅油2~5份、氧化石墨烯1~3份、硬脂酸1~3份、热稳定剂2~4份、抗氧化剂1.7~2.4份、增塑剂0.9~1.8份。所述电子变压器专用绝缘胶带基材采用聚酸亚胺、乙烯‑乙酸乙烯酯共聚物、丁基橡胶、聚异丁烯作为主要原料,并添加其他助剂,原料和助剂间相互协同作用,制备出的产品热稳定性好,还能避免使用重金属造成的环境污染的问题。
Description
技术领域
本发明属于电子变压器技术领域,具体涉及一种电子变压器专用绝缘胶带基材及其制备方法。
背景技术
PVC因其优良的柔韧性和从形性,且价格低廉,而成为绝缘胶带最常用的一种基材。但PVC的缺点在于的热稳定性较差,在使用过程中会产生变色、热降解等劣化现象,现有通常是加入某些重金属或重金属化合物,如含铅或含镉的化合物作为PVC的热稳定性,这些重金属对环境造成严重污染。
发明内容
本发明提供了一种电子变压器专用绝缘胶带基材及其制备方法,解决了上述背景技术中的问题,所述电子变压器专用绝缘胶带基材采用聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶、聚异丁烯作为主要原料,并添加其他助剂,原料和助剂间相互协同作用,制备出的产品热稳定性好,还能避免使用重金属造成的环境污染的问题。
为了解决现有技术存在的问题,采用如下技术方案:
一种电子变压器专用绝缘胶带基材,包括如下重量份的原料:聚酸亚胺20~30份、乙烯-乙酸乙烯酯共聚物18~32份、丁基橡胶5~9份、聚异丁烯9~14份、纳米碳酸钙3~6份、超细滑石粉3~7份、改性麦秆纤维3~6份、硫酸锌2~4份、甲基硅油2~5份、氧化石墨烯1~3份、硬脂酸1~3份、热稳定剂2~4份、抗氧化剂1.7~2.4份、增塑剂0.9~1.8份。
优选的,所述电子变压器专用绝缘胶带基材,包括如下重量份的原料:聚酸亚胺22~29份、乙烯-乙酸乙烯酯共聚物20~25份、丁基橡胶6~8份、聚异丁烯10~13份、纳米碳酸钙4~5份、超细滑石粉4~6份、改性麦秆纤维4~5份、硫酸锌2.3~3.6份、甲基硅油3~4份、氧化石墨烯1.5~2.4份、硬脂酸1.7~2.8份、热稳定剂2.5~3.5份、抗氧化剂1.9~2.2份、增塑剂1~1.4份。
优选的,所述电子变压器专用绝缘胶带基材,包括如下重量份的原料:聚酸亚胺28份、乙烯-乙酸乙烯酯共聚物23份、丁基橡胶7份、聚异丁烯12份、纳米碳酸钙4.6份、超细滑石粉5份、改性麦秆纤维4.3份、硫酸锌2.9份、甲基硅油3.4份、氧化石墨烯2份、硬脂酸2.1份、热稳定剂2.9份、抗氧化剂2份、增塑剂1.2份。
优选的,改性麦秆纤维的制备方法如下:
(1)将麦秆用质量分数15%氢氧化钠浸泡1.5小时,预处理温度为110℃,然后在60℃下脱水烘干,再放入磨粉机中磨成纤维,经过筛分处理后得到20~60目颗粒,然后在烘箱110℃温度条件下,进行24小时干燥处理,得麦秆纤维;
(2)最后再将80份麦秆纤维、4份硬醋酸钙和4份纳米氧化铝加入球磨机,在转速为110r/min下搅拌15分钟,得到改性纤维。
优选的,所述热稳定剂为甘油磷酸钙与草酸锌的混合物。
优选的,所述增塑剂为多元醇类。
一种制备所述电子变压器专用绝缘胶带基材的方法,包括如下步骤:
(1)按上述配方称取聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶、聚异丁烯、纳米碳酸钙、超细滑石粉、改性麦秆纤维、硫酸锌、甲基硅油、氧化石墨烯、硬脂酸、热稳定剂、抗氧化剂、增塑剂,备用;
(2)将聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶及聚异丁烯一起置于混炼机中,加热至93~98℃,混炼15~25分钟,得混炼混合物;
(3)向混炼混合物中依次加入硬脂酸、硫酸锌、甲基硅油,保持50~60℃,密炼5~10分钟,然后加入纳米碳酸钙、超细滑石粉、改性麦秆纤维、氧化石墨烯、热稳定剂、抗氧化剂及增塑剂混炼3~6分钟,即得混炼胶;
(4)将步骤(3)所得的混炼胶置于三辊压延机中压片,冷却至常温,即得所述电子变压器专用绝缘胶带基材。
优选的,所述步骤(4)中压延机的温度为90~100℃。
本发明与现有技术相比,其具有以下有益效果:
本发明所述的电子变压器专用绝缘胶带基材采用聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶、聚异丁烯作为主要原料,并添加其他助剂,原料和助剂间相互协同作用,制备出的产品热稳定性好,还能避免使用重金属造成的环境污染的问题,具体如下:
(1)本发明所述的电子变压器专用绝缘胶带基材原料添加聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶及聚异丁烯作为原料,聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶及聚异丁烯相互融合,制备出的产品耐水、耐湿性佳;耐臭氧、耐化学药品、耐候性佳;耐老化可长期保存, 其产品绝缘性能好;
(2)本发明所述的电子变压器专用绝缘胶带基材原料中添加了甘油磷酸钙与草酸锌的混合物作为热稳定剂,有效提高产品的热稳定性;
(3)本发明所述的电子变压器专用绝缘胶带基材生产工艺参数控制,保证产品的成品特性和优异的性能状态。
具体实施方式
下面结合具体实施例,进一步阐述本发明。这些实施例仅用于说明本发明而不用于限制本发明的范围。
实施例1
本实施例涉及一种电子变压器专用绝缘胶带基材,包括如下重量份的原料:聚酸亚胺20份、乙烯-乙酸乙烯酯共聚物18份、丁基橡胶5份、聚异丁烯9份、纳米碳酸钙3份、超细滑石粉3份、改性麦秆纤维3份、硫酸锌2份、甲基硅油2份、氧化石墨烯1份、硬脂酸1份、热稳定剂2份、抗氧化剂1.7份、增塑剂0.9份。
其中,改性麦秆纤维的制备方法如下:
(1)将麦秆用质量分数15%氢氧化钠浸泡1.5小时,预处理温度为110℃,然后在60℃下脱水烘干,再放入磨粉机中磨成纤维,经过筛分处理后得到20~60目颗粒,然后在烘箱110℃温度条件下,进行24小时干燥处理,得麦秆纤维;
(2)最后再将80份麦秆纤维、4份硬醋酸钙和4份纳米氧化铝加入球磨机,在转速为110r/min下搅拌15分钟,得到改性纤维。
其中,所述热稳定剂为甘油磷酸钙与草酸锌的混合物。
其中,所述增塑剂为多元醇类。
一种制备所述电子变压器专用绝缘胶带基材的方法,包括如下步骤:
(1)按上述配方称取聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶、聚异丁烯、纳米碳酸钙、超细滑石粉、改性麦秆纤维、硫酸锌、甲基硅油、氧化石墨烯、硬脂酸、热稳定剂、抗氧化剂、增塑剂,备用;
(2)将聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶及聚异丁烯一起置于混炼机中,加热至93℃,混炼15分钟,得混炼混合物;
(3)向混炼混合物中依次加入硬脂酸、硫酸锌、甲基硅油,保持50℃,密炼5分钟,然后加入纳米碳酸钙、超细滑石粉、改性麦秆纤维、氧化石墨烯、热稳定剂、抗氧化剂及增塑剂混炼3分钟,即得混炼胶;
(4)将步骤(3)所得的混炼胶置于三辊压延机中压片,冷却至常温,即得所述电子变压器专用绝缘胶带基材。
其中,所述步骤(4)中压延机的温度为90℃。
实施例2
本实施例涉及一种电子变压器专用绝缘胶带基材,包括如下重量份的原料:聚酸亚胺30份、乙烯-乙酸乙烯酯共聚物32份、丁基橡胶9份、聚异丁烯14份、纳米碳酸钙6份、超细滑石粉7份、改性麦秆纤维6份、硫酸锌4份、甲基硅油5份、氧化石墨烯3份、硬脂酸3份、热稳定剂4份、抗氧化剂2.4份、增塑剂1.8份。
其中,改性麦秆纤维的制备方法如下:
(1)将麦秆用质量分数15%氢氧化钠浸泡1.5小时,预处理温度为110℃,然后在60℃下脱水烘干,再放入磨粉机中磨成纤维,经过筛分处理后得到20~60目颗粒,然后在烘箱110℃温度条件下,进行24小时干燥处理,得麦秆纤维;
(2)最后再将80份麦秆纤维、4份硬醋酸钙和4份纳米氧化铝加入球磨机,在转速为110r/min下搅拌15分钟,得到改性纤维。
其中,所述热稳定剂为甘油磷酸钙与草酸锌的混合物。
其中,所述增塑剂为多元醇类。
一种制备所述电子变压器专用绝缘胶带基材的方法,包括如下步骤:
(1)按上述配方称取聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶、聚异丁烯、纳米碳酸钙、超细滑石粉、改性麦秆纤维、硫酸锌、甲基硅油、氧化石墨烯、硬脂酸、热稳定剂、抗氧化剂、增塑剂,备用;
(2)将聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶及聚异丁烯一起置于混炼机中,加热至98℃,混炼25分钟,得混炼混合物;
(3)向混炼混合物中依次加入硬脂酸、硫酸锌、甲基硅油,保持60℃,密炼10分钟,然后加入纳米碳酸钙、超细滑石粉、改性麦秆纤维、氧化石墨烯、热稳定剂、抗氧化剂及增塑剂混炼6分钟,即得混炼胶;
(4)将步骤(3)所得的混炼胶置于三辊压延机中压片,冷却至常温,即得所述电子变压器专用绝缘胶带基材。
其中,所述步骤(4)中压延机的温度为100℃。
实施例3
本实施例涉及一种电子变压器专用绝缘胶带基材,包括如下重量份的原料:聚酸亚胺22份、乙烯-乙酸乙烯酯共聚物20份、丁基橡胶6份、聚异丁烯10份、纳米碳酸钙4份、超细滑石粉4份、改性麦秆纤维4份、硫酸锌2.3份、甲基硅油3份、氧化石墨烯1.5份、硬脂酸1.7份、热稳定剂2.5份、抗氧化剂1.9份、增塑剂1份。
其中,改性麦秆纤维的制备方法如下:
(1)将麦秆用质量分数15%氢氧化钠浸泡1.5小时,预处理温度为110℃,然后在60℃下脱水烘干,再放入磨粉机中磨成纤维,经过筛分处理后得到20~60目颗粒,然后在烘箱110℃温度条件下,进行24小时干燥处理,得麦秆纤维;
(2)最后再将80份麦秆纤维、4份硬醋酸钙和4份纳米氧化铝加入球磨机,在转速为110r/min下搅拌15分钟,得到改性纤维。
其中,所述热稳定剂为甘油磷酸钙与草酸锌的混合物。
其中,所述增塑剂为多元醇类。
一种制备所述电子变压器专用绝缘胶带基材的方法,包括如下步骤:
(1)按上述配方称取聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶、聚异丁烯、纳米碳酸钙、超细滑石粉、改性麦秆纤维、硫酸锌、甲基硅油、氧化石墨烯、硬脂酸、热稳定剂、抗氧化剂、增塑剂,备用;
(2)将聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶及聚异丁烯一起置于混炼机中,加热至94℃,混炼18分钟,得混炼混合物;
(3)向混炼混合物中依次加入硬脂酸、硫酸锌、甲基硅油,保持52℃,密炼6分钟,然后加入纳米碳酸钙、超细滑石粉、改性麦秆纤维、氧化石墨烯、热稳定剂、抗氧化剂及增塑剂混炼4分钟,即得混炼胶;
(4)将步骤(3)所得的混炼胶置于三辊压延机中压片,冷却至常温,即得所述电子变压器专用绝缘胶带基材。
其中,所述步骤(4)中压延机的温度为92℃。
实施例4
本实施例涉及一种电子变压器专用绝缘胶带基材,包括如下重量份的原料:聚酸亚胺29份、乙烯-乙酸乙烯酯共聚物25份、丁基橡胶8份、聚异丁烯13份、纳米碳酸钙5份、超细滑石粉6份、改性麦秆纤维5份、硫酸锌3.6份、甲基硅油4份、氧化石墨烯2.4份、硬脂酸2.8份、热稳定剂3.5份、抗氧化剂2.2份、增塑剂1.4份。
其中,改性麦秆纤维的制备方法如下:
(1)将麦秆用质量分数15%氢氧化钠浸泡1.5小时,预处理温度为110℃,然后在60℃下脱水烘干,再放入磨粉机中磨成纤维,经过筛分处理后得到20~60目颗粒,然后在烘箱110℃温度条件下,进行24小时干燥处理,得麦秆纤维;
(2)最后再将80份麦秆纤维、4份硬醋酸钙和4份纳米氧化铝加入球磨机,在转速为110r/min下搅拌15分钟,得到改性纤维。
其中,所述热稳定剂为甘油磷酸钙与草酸锌的混合物。
其中,所述增塑剂为多元醇类。
一种制备所述电子变压器专用绝缘胶带基材的方法,包括如下步骤:
(1)按上述配方称取聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶、聚异丁烯、纳米碳酸钙、超细滑石粉、改性麦秆纤维、硫酸锌、甲基硅油、氧化石墨烯、硬脂酸、热稳定剂、抗氧化剂、增塑剂,备用;
(2)将聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶及聚异丁烯一起置于混炼机中,加热至95℃,混炼20分钟,得混炼混合物;
(3)向混炼混合物中依次加入硬脂酸、硫酸锌、甲基硅油,保持55℃,密炼7分钟,然后加入纳米碳酸钙、超细滑石粉、改性麦秆纤维、氧化石墨烯、热稳定剂、抗氧化剂及增塑剂混炼4分钟,即得混炼胶;
(4)将步骤(3)所得的混炼胶置于三辊压延机中压片,冷却至常温,即得所述电子变压器专用绝缘胶带基材。
其中,所述步骤(4)中压延机的温度为5℃。
实施例5
本实施例涉及一种电子变压器专用绝缘胶带基材,包括如下重量份的原料:聚酸亚胺28份、乙烯-乙酸乙烯酯共聚物23份、丁基橡胶7份、聚异丁烯12份、纳米碳酸钙4.6份、超细滑石粉5份、改性麦秆纤维4.3份、硫酸锌2.9份、甲基硅油3.4份、氧化石墨烯2份、硬脂酸2.1份、热稳定剂2.9份、抗氧化剂2份、增塑剂1.2份。
其中,改性麦秆纤维的制备方法如下:
(1)将麦秆用质量分数15%氢氧化钠浸泡1.5小时,预处理温度为110℃,然后在60℃下脱水烘干,再放入磨粉机中磨成纤维,经过筛分处理后得到20~60目颗粒,然后在烘箱110℃温度条件下,进行24小时干燥处理,得麦秆纤维;
(2)最后再将80份麦秆纤维、4份硬醋酸钙和4份纳米氧化铝加入球磨机,在转速为110r/min下搅拌15分钟,得到改性纤维。
其中,所述热稳定剂为甘油磷酸钙与草酸锌的混合物。
其中,所述增塑剂为多元醇类。
一种制备所述电子变压器专用绝缘胶带基材的方法,包括如下步骤:
(1)按上述配方称取聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶、聚异丁烯、纳米碳酸钙、超细滑石粉、改性麦秆纤维、硫酸锌、甲基硅油、氧化石墨烯、硬脂酸、热稳定剂、抗氧化剂、增塑剂,备用;
(2)将聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶及聚异丁烯一起置于混炼机中,加热至97℃,混炼22分钟,得混炼混合物;
(3)向混炼混合物中依次加入硬脂酸、硫酸锌、甲基硅油,保持58℃,密炼9分钟,然后加入纳米碳酸钙、超细滑石粉、改性麦秆纤维、氧化石墨烯、热稳定剂、抗氧化剂及增塑剂混炼5分钟,即得混炼胶;
(4)将步骤(3)所得的混炼胶置于三辊压延机中压片,冷却至常温,即得所述电子变压器专用绝缘胶带基材。
其中,所述步骤(4)中压延机的温度为98℃。
以上对本发明的具体实施例进行了描述。需要理解的是,本发明并不局限于上述特定实施方式,本领域技术人员可以在权利要求的范围内做出各种变形或修改,这并不影响本发明的实质内容。
Claims (8)
1.一种电子变压器专用绝缘胶带基材,其特征在于,包括如下重量份的原料:聚酸亚胺20~30份、乙烯-乙酸乙烯酯共聚物18~32份、丁基橡胶5~9份、聚异丁烯9~14份、纳米碳酸钙3~6份、超细滑石粉3~7份、改性麦秆纤维3~6份、硫酸锌2~4份、甲基硅油2~5份、氧化石墨烯1~3份、硬脂酸1~3份、热稳定剂2~4份、抗氧化剂1.7~2.4份、增塑剂0.9~1.8份。
2.根据权利要求1所述的电子变压器专用绝缘胶带基材,其特征在于,包括如下重量份的原料:聚酸亚胺22~29份、乙烯-乙酸乙烯酯共聚物20~25份、丁基橡胶6~8份、聚异丁烯10~13份、纳米碳酸钙4~5份、超细滑石粉4~6份、改性麦秆纤维4~5份、硫酸锌2.3~3.6份、甲基硅油3~4份、氧化石墨烯1.5~2.4份、硬脂酸1.7~2.8份、热稳定剂2.5~3.5份、抗氧化剂1.9~2.2份、增塑剂1~1.4份。
3.根据权利要求1所述的电子变压器专用绝缘胶带基材,其特征在于,包括如下重量份的原料:聚酸亚胺28份、乙烯-乙酸乙烯酯共聚物23份、丁基橡胶7份、聚异丁烯12份、纳米碳酸钙4.6份、超细滑石粉5份、改性麦秆纤维4.3份、硫酸锌2.9份、甲基硅油3.4份、氧化石墨烯2份、硬脂酸2.1份、热稳定剂2.9份、抗氧化剂2份、增塑剂1.2份。
4.根据权利要求1所述的电子变压器专用绝缘胶带基材,其特征在于,改性麦秆纤维的制备方法如下:
(1)将麦秆用质量分数15%氢氧化钠浸泡1.5小时,预处理温度为110℃,然后在60℃下脱水烘干,再放入磨粉机中磨成纤维,经过筛分处理后得到20~60目颗粒,然后在烘箱110℃温度条件下,进行24小时干燥处理,得麦秆纤维;
(2)最后再将80份麦秆纤维、4份硬醋酸钙和4份纳米氧化铝加入球磨机,在转速为110r/min下搅拌15分钟,得到改性纤维。
5.根据权利要求1所述的电子变压器专用绝缘胶带基材,其特征在于,所述热稳定剂为甘油磷酸钙与草酸锌的混合物。
6.根据权利要求1所述的电子变压器专用绝缘胶带基材,其特征在于,所述增塑剂为多元醇类。
7.一种制备权利要求1~6任一项所述电子变压器专用绝缘胶带基材的方法,其特征在于,包括如下步骤:
(1)按上述配方称取聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶、聚异丁烯、纳米碳酸钙、超细滑石粉、改性麦秆纤维、硫酸锌、甲基硅油、氧化石墨烯、硬脂酸、热稳定剂、抗氧化剂、增塑剂,备用;
(2)将聚酸亚胺、乙烯-乙酸乙烯酯共聚物、丁基橡胶及聚异丁烯一起置于混炼机中,加热至93~98℃,混炼15~25分钟,得混炼混合物;
(3)向混炼混合物中依次加入硬脂酸、硫酸锌、甲基硅油,保持50~60℃,密炼5~10分钟,然后加入纳米碳酸钙、超细滑石粉、改性麦秆纤维、氧化石墨烯、热稳定剂、抗氧化剂及增塑剂混炼3~6分钟,即得混炼胶;
(4)将步骤(3)所得的混炼胶置于三辊压延机中压片,冷却至常温,即得所述电子变压器专用绝缘胶带基材。
8.根据权利要求7所述的制备方法,其特征在于,所述步骤(4)中压延机的温度为90~100℃。
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