直接(jie)測(ce)數法是憑借照布鏡(jing)或織物密度(du)(du)(du)分(fen)析鏡(jing)來完成。織物密度(du)(du)(du)分(fen)析鏡(jing)的刻(ke)度(du)(du)(du)尺長(chang)度(du)(du)(du)為(wei)(wei)5cm,在分(fen)析鏡(jing)頭下面,一塊長(chang)條形(xing)玻(bo)璃(li)片上(shang)刻(ke)有一條紅線(xian), 尼龍纖(xian)維(wei)強度(du)(du)(du)高(gao)達700牛/(毫米·層),耐水,抗腐蝕(shi),耐彎曲(qu)疲(pi)勞;但(dan)彈性伸(shen)(shen)長(chang)較大(da)。聚酯纖(xian)維(wei)性能與尼龍纖(xian)維(wei)相近(jin),而使用時彈性伸(shen)(shen)長(chang)僅為(wei)(wei)尼龍纖(xian)維(wei)的一半,是一種(zhong)有發展前途...