關于(yu)紗線(xian)的(de)細度指標

　　1、英(ying)制(zhi)支(zhi)數(shu)(shu)（Ne）——在(zai)公定(ding)回潮率下，1磅重紗(sha)線長(chang)(chang)度的840碼(ma)的倍數(shu)(shu)，也就是(shi)說(shuo)1磅重紗(sha)線正(zheng)好840碼(ma)長(chang)(chang)，為(wei)(wei)(wei)1支(zhi)紗(sha)，1磅重紗(sha)線長(chang)(chang)度為(wei)(wei)(wei)21×840 碼(ma)長(chang)(chang)，紗(sha)線的細(xi)度為(wei)(wei)(wei)21支(zhi)，寫(xie)為(wei)(wei)(wei)21s 。英(ying)制(zhi)支(zhi)數(shu)(shu)是(shi)定(ding)重制(zhi)，因此支(zhi)數(shu)(shu)越(yue)大(da)紗(sha)線越(yue)細(xi)。英(ying)制(zhi)支(zhi)數(shu)(shu)不是(shi)我國(guo)當今法定(ding)的紗(sha)線細(xi)度指標，但在(zai)企業中仍然被廣泛的使用，尤其是(shi)棉型(xing)紡織行(xing)業。

　　2、公(gong)制(zhi)支(zhi)(zhi)數(shu)（Nm）——在公(gong)定回潮率(lv)下(xia)，1克(ke)(ke)重紗(sha)線(xian)(xian)長度(du)(du)的(de)(de)米倍(bei)數(shu)，也(ye)就(jiu)是說1克(ke)(ke)重紗(sha)線(xian)(xian)正好(hao)1米長，為1（公(gong)）支(zhi)(zhi)紗(sha)，1克(ke)(ke)重紗(sha)線(xian)(xian)長度(du)(du)為200米長，紗(sha)線(xian)(xian)的(de)(de)細(xi)度(du)(du)為200支(zhi)(zhi)。公(gong)制(zhi)支(zhi)(zhi)數(shu)也(ye)是定重制(zhi)，因此支(zhi)(zhi)數(shu)越大紗(sha)線(xian)(xian)越細(xi)。棉紡織毛紡織行業都有使用。

　　3、特克斯（Tex）數——又稱“號數”，是指1000米(mi)長(chang)紗線(xian)在公定回潮率下重(zhong)量(liang)的克數，它是定長(chang)制單位，克重(zhong)越大紗線(xian)越粗，常(chang)用來表示毛(mao)紗。

　　4、纖(xian)(xian)度(du)（D）——又稱“旦數(shu)(shu)”或(huo)（旦尼爾：denier），是指在公定回(hui)潮率下，9000米(mi)紗(sha)(sha)(sha)線(xian)(xian)(xian)或(huo)纖(xian)(xian)維所具有重(zhong)(zhong)(zhong)量(liang)(liang)的克(ke)數(shu)(shu)，它(ta)同樣是定長(chang)(chang)制單位，克(ke)重(zhong)(zhong)(zhong)越(yue)(yue)大紗(sha)(sha)(sha)線(xian)(xian)(xian)或(huo)纖(xian)(xian)維越(yue)(yue)粗，常用來(lai)表(biao)示(shi)化纖(xian)(xian)長(chang)(chang)絲(si)、真(zhen)絲(si)等。 由于纖(xian)(xian)維長(chang)(chang)絲(si)與紗(sha)(sha)(sha)線(xian)(xian)(xian)形(xing)狀不規(gui)則(ze)，且紗(sha)(sha)(sha)線(xian)(xian)(xian)表(biao)面有毛羽（伸出(chu)的纖(xian)(xian)維短毛），因此我們不能夠用直徑表(biao)示(shi)其細度(du)，所以紡織工作(zuo)者使(shi)用上述指標表(biao)示(shi)。紗(sha)(sha)(sha)線(xian)(xian)(xian)細度(du)指標計(ji)算公式與換(huan)(huan)算關(guan)(guan)系(xi) Ne=紗(sha)(sha)(sha)線(xian)(xian)(xian)長(chang)(chang)度(du)碼(ma)數(shu)(shu)/（840*紗(sha)(sha)(sha)線(xian)(xian)(xian)重(zhong)(zhong)(zhong)量(liang)(liang)磅數(shu)(shu)） Nm=纖(xian)(xian)維或(huo)紗(sha)(sha)(sha)線(xian)(xian)(xian)長(chang)(chang)度(du)米(mi)數(shu)(shu)/重(zhong)(zhong)(zhong)量(liang)(liang)克(ke)數(shu)(shu) Ntex=（1000*纖(xian)(xian)維或(huo)紗(sha)(sha)(sha)線(xian)(xian)(xian)重(zhong)(zhong)(zhong)量(liang)(liang)克(ke)數(shu)(shu)）/長(chang)(chang)度(du)米(mi)數(shu)(shu) Nden=（9000*纖(xian)(xian)維或(huo)紗(sha)(sha)(sha)線(xian)(xian)(xian)重(zhong)(zhong)(zhong)量(liang)(liang)克(ke)數(shu)(shu)）/長(chang)(chang)度(du)米(mi)數(shu)(shu) 換(huan)(huan)算關(guan)(guan)系(xi)：Nm=9000/Nden Ntex=1000/Nm Ntex=Nden/9 Ntex=583/Ne(棉(mian)型(xing)材(cai)料(liao))； Ntex=590.5/Ne（化纖(xian)(xian)）