stretch ratio meaning in English
拉伸比
运条比
Examples
- By optimizing and controlling the technology conditions of grey yam linear density , spinning speed , stretching temperature , stretching ratio , tension - setting and shrink - setting , the polyester staple with shrinkage rate over 20 % was successfully developed with normal polyester chip
通过对原丝线密度、纺丝速度、拉伸温度、拉伸倍率、紧张热定型及松弛热定型等工艺条件的优化和控制，采用常规聚酯切片成功开发出收缩率在20 %以上的涤纶短纤维。 - Physics capability such as density , conduct and mechanics capability such as tensile strength , hardness and stretch ratio were tested during technical course . photograph analysis and empa analysis were carried out . the influence factor on materials physics and mechanics capability were investigated , which induced by powders synthesis technique , pressure and sinter temperature
在制备铜基复合材料的工艺过程中，对材料进行密度、电导率等物理性能和抗拉强度、布氏硬度、延伸率等力学性能的测试，进行金相分析和empa分析，研究了粉末合成工艺、压制压强、烧结温度等对材料物理、力学性能的影响，探索了材料密度、布氏硬度、电导率、抗拉强度、延伸率等之间的关系。 - Hot stretching ratio ( hsr ) was maintained at 3 . 96 , cb content was changed . the results indicate that when the cb content increases , the room temperature resistivity of composites decreases . at the cb content of 12phr , the room temperature resistivity of blends sharply reduces , and composites change from insulator to conductor , the value is entitled the percolation threshold ; at the cb content of 20phr , the room temperature resistivity of composites achieves 10 ~ ( 2 ) cm
结果表明:随炭黑含量增加，复合材料的体积电阻率降低，当炭黑含量达到12phr ( phr指每一百份树脂中所含填充物的重量份数)左右时，复合材料的体积电阻率急剧下降，此时一复合材料由绝缘体向导体转变，这个值被称为逾渗阀值;当炭黑含量到20phr时，复合材料的体积电阻率达到1 。 - In this investigation carbon black - filled electrical conductive composites of poly ( ethylene terephthalate ) / polyethylene were first prepared through the single - screw melt - blended extrusion , then drawing , followed by the quenching and subsequent press molding . the relationships among the influencing factors including composition , hot stretching ratio and compatibilizer , morphology and properties of composites were systematically investigated . positive temperature coefficients effect and crystallization behaviors of composites were preliminarily analyzed
本文拟采用单螺杆熔融共混挤出?热拉伸?淬冷的新的成型方法制备炭黑填充的pet pe复合导电材料，热拉伸的目的是使材料的分散相( pet相)在加工过程中原位形成纤维，而炭黑基本分散在纤维中或纤维的表面上，使炭黑粒子间间距减小，形成更多的导电通路，从而提高材料的导电性能，同时保持或提高材料的力学性能。