直接測(ce)數(shu)法是(shi)憑借照(zhao)布鏡或織(zhi)物密度分(fen)析鏡來(lai)完(wan)成(cheng)。織(zhi)物密度分(fen)析鏡的刻度尺長(chang)度為5cm,在(zai)分(fen)析鏡頭下(xia)面,一(yi)塊長(chang)條形玻璃片上(shang)刻有(you)一(yi)條紅線(xian), 尼龍(long)纖(xian)維(wei)強度高達700牛(niu)/(毫(hao)米·層),耐(nai)水,抗(kang)腐蝕,耐(nai)彎曲疲(pi)勞;但彈(dan)(dan)性伸(shen)長(chang)較大。聚酯纖(xian)維(wei)性能與尼龍(long)纖(xian)維(wei)相近(jin),而使(shi)用時彈(dan)(dan)性伸(shen)長(chang)僅為尼龍(long)纖(xian)維(wei)的一(yi)半,是(shi)一(yi)種有(you)發展前(qian)途(tu)...