直(zhi)接測數法(fa)是憑借照布鏡(jing)或織物(wu)密度(du)(du)(du)分(fen)析(xi)鏡(jing)來(lai)完成。織物(wu)密度(du)(du)(du)分(fen)析(xi)鏡(jing)的刻度(du)(du)(du)尺長度(du)(du)(du)為5cm,在分(fen)析(xi)鏡(jing)頭下(xia)面,一塊長條形玻璃片(pian)上刻有一條紅(hong)線, 維(wei)尼綸纖(xian)維(wei)強度(du)(du)(du)達200牛(niu)/(毫(hao)米·層),彈性伸長比尼龍(long)纖(xian)維(wei)小(xiao),易與橡膠(jiao)粘(zhan)合,耐(nai)熱性能好,但(dan)濕態時強度(du)(du)(du)要降低10~25%,僅(jin)在中國、日(ri)本(ben)等少(shao)數國家應用(yong)。在編織帶芯時...