Preparation method and application of aramid insulation paper

The invention discloses a preparation method and application of aramid insulation paper, aramid fibrid is subjected to repulping and defibering treatment, a CTI additive containing metal elements is added, then wet forming is carried out to prepare the aramid insulation paper, the CTI additive containing the metal elements is subjected to wet grinding, weak acid is added to adjust the pH to 3-4, then the pH is adjusted to be neutral with alkali liquor, and the aramid insulation paper is obtained. The aramid insulation paper prepared by using the treated CTI additive can greatly improve the breakdown strength and the tracking index of the aramid insulation paper, prevents failure caused by breakdown and surface electric etching, and ensures the application of the aramid insulation paper as an insulating material in a new energy automobile motor. 本发明公开一种芳纶绝缘纸的制备方法及其应用，将芳纶沉析纤维经碎浆和疏解处理加入含金属元素的CTI添加剂后湿法成型制备得到芳纶绝缘纸，其中含金属元素的CTI添加剂经过湿式研磨后加入弱酸调节pH至3～4，然后用碱液调节pH至中性后得到，利用处理后的CTI添加剂制备得到的芳纶绝缘纸能大幅提升了其击穿强度、漏电起痕指数，防止因被击穿和表面被