long-term usage meaning in Chinese

长期使用

When change the component of adhesive its shear strength increased from 39 . 3 mpa to 53 . 5 mpa at room temperature and it have long - term usage at 180 with 25 mpa and can be served at 230 in short period . the addition of liquid rubber resulted in a 300 % increase in the peeling strength . the addition of polymer ether imide led to a 260 % increase in the peeling strength , a 15 % increase in shear strength and a 10 increase in tg ( tg = 195 . 54 )
研究结果表明： bmi dds e ? 51 tde ? 85组成的胶粘剂体系的室温剪切强度为39 . 3mpa ，当改变环氧树脂的含量时，剪切强度提高到53 . 5mpa ；用无规羧基液体丁腈橡胶改性环氧树脂胶粘剂时室温剥离强度提高3 . 0倍；用聚醚酰亚胺改性环氧树脂胶粘剂，室温剪切强度最高可达45 . 2mpa ，剥离强度提高2 . 6倍，玻璃化转变温度tg = 195 . 54 ，比未增韧体系提高10以上；碳纤维耐磨材料与同步器圆锥环的粘接实验结果表明，胶粘剂的使用工艺性能良好，满足室温剪切强度30mpa和180剪切强度12 . 5mpa的技术要求。