汽车安全气囊用电点火药电感度研究  

Study on Inductance Degree of Electric Ignition Powder in Automobile Airbag

作　　者：程秀莲[1] 许赵伟 CHENG Xiulian;XU Zhaowei(College of Equipment Engineering,Shenyang Ligong University,Liaoning Shenyang,110159;Shaanxi Qinghua Vehicle Safety Systems Co.,Ltd,Shaanxi Xi'an,710025)

机构地区：[1]沈阳理工大学装备工程学院,辽宁沈阳110159 [2]陕西庆华汽车安全系统有限公司,陕西西安710025

出　　处：《爆破器材》2022年第3期14-20,共7页Explosive Materials

摘　　要：用电点火管的0.01%发火电流I_(0.01%)和99.99%发火电流I_(99.99%)表征汽车安全气囊用电点火药的电感度。研究了共沉淀物中苦味酸钾(KP)与高氯酸钾(KClO_(4))质量比对电点火管1.2 A、2 ms和0.4 A、10 s发火性能的影响。实验结果表明,KP与KClO_(4)质量比为4.0:6.0的共沉淀物,满足美国汽车行业USCAR—28标准规定的电点火管的功能指标。筛选了氟橡胶为电点火药的黏合剂,石墨为电点火药的惰性添加剂,并通过升降法测试了优化配方的电感度,I_(0.01%)=0.458 A、I_(99.99%)=0.851 A,满足电点火管的安全性和可靠性指标。共沉淀物中KP与KClO_(4)质量比为4.0:6.0,外加质量分数3%的氟橡胶和适量石墨,可制备一种能满足汽车安全气囊用电点火管安全性和可靠性要求的电点火药。The inductance of electric ignition powder for automobile airbag was indicated by 0.01%ignition current I_(0.01%)and 99.99%ignition current I_(99.99%)of electric ignition tube.The effect of the mass ratio of potassium picrate(KP)to potassium perchlorate(KClO_(4))in coprecipitation on the ignition performance of electric ignition tube at 1.2 A,2 ms and 0.4 A,10 s was studied.The results show that mass ratio of KP to KClO_(4) in the coprecipitation is 4.0:6.0,which meets the functional index of electric ignition tube specified in USCAR—28 standard of automobile industry in American.Fluororubber was selected as the binder of electric ignition powder and graphite as the inert additive of electric ignition powder.Inductance degree of the optimized formula was tested by lifting method,indicating I_(0.01%)=0.458 A and I_(99.99%)=0.851 A,which meets the safety and reliability indexes of electric ignition tube.When the mass ratio of KP to KClO_(4) in the coprecipitation is 4.0:6.0,add 3%(mass fraction)fluororubber and an appropriate amount of graphite,and it is an electric ignition powder that meets the safety and reliable performance of the electric ignition tube in automobile airbag.

关 键 词：苦味酸钾 高氯酸钾 电点火管 升降法 电感度 

分 类 号：TD235.22[矿业工程—矿井建设]