直(zhi)接測數法是(shi)憑借照布鏡或(huo)織物密(mi)度(du)(du)分析鏡來完成。織物密(mi)度(du)(du)分析鏡的刻(ke)度(du)(du)尺長(chang)(chang)度(du)(du)為(wei)5cm,在分析鏡頭下面,一塊長(chang)(chang)條形(xing)玻璃片上刻(ke)有一條紅線(xian), 尼龍纖(xian)維(wei)強度(du)(du)高達700牛/(毫(hao)米·層),耐水,抗(kang)腐(fu)蝕,耐彎(wan)曲疲(pi)勞;但彈(dan)性伸長(chang)(chang)較大(da)。聚酯纖(xian)維(wei)性能與尼龍纖(xian)維(wei)相近,而使(shi)用(yong)時彈(dan)性伸長(chang)(chang)僅為(wei)尼龍纖(xian)維(wei)的一半,是(shi)一種(zhong)有發展(zhan)前途...