涤纶纺黏针刺土工布均大于涤纶短纤维针刺土工布

( 1) 纵横向断(duan)裂强度: 涤纶纺黏针(zhen)刺土工布(bu)均大于(yu)涤纶短纤(xian)维针(zhen)刺土工布(bu)，数值上前者(zhe)(zhe)约(yue)是(shi)后者(zhe)(zhe)的 2 倍(bei)。

( 2) 纵(zong)向断(duan)裂伸长率: 面密(mi)(mi)度(du)低于(yu) 200 g /m2时，涤(di)纶纺黏针刺(ci)土工布 ＞ 涤(di)纶短纤(xian)维针刺(ci)土工布; 面密(mi)(mi)度(du)大于(yu) 200 g /m2、小(xiao)于(yu) 400 g/m2时，涤(di)纶

纺黏针刺(ci)土工(gong)布(bu) ＜ 涤纶(lun)短(duan)纤(xian)维针刺(ci)土工(gong)布(bu)。

( 3) 横向(xiang)断裂伸(shen)(shen)(shen)长(zhang)率(lv): 面密度(du)低于(yu)约(yue) 150 g /m2时，涤纶(lun)(lun)纺(fang)(fang)黏(nian)针(zhen)(zhen)(zhen)(zhen)刺(ci)(ci)土(tu)工(gong)(gong)布(bu)(bu)(bu) ＞ 涤纶(lun)(lun)短(duan)纤(xian)(xian)(xian)(xian)维(wei)(wei)(wei)针(zhen)(zhen)(zhen)(zhen)刺(ci)(ci)土(tu)工(gong)(gong)布(bu)(bu)(bu); 面密度(du)大(da)(da)于(yu) 150 g /m2、小于(yu) 400 g/m2时，涤纶(lun)(lun)纺(fang)(fang)黏(nian)针(zhen)(zhen)(zhen)(zhen)刺(ci)(ci)土(tu)工(gong)(gong)布(bu)(bu)(bu) ＜ 涤纶(lun)(lun)短(duan)纤(xian)(xian)(xian)(xian)维(wei)(wei)(wei)针(zhen)(zhen)(zhen)(zhen)刺(ci)(ci)土(tu)工(gong)(gong)布(bu)(bu)(bu)。涤纶(lun)(lun)纺(fang)(fang)黏(nian)针(zhen)(zhen)(zhen)(zhen)刺(ci)(ci)土(tu)工(gong)(gong)布(bu)(bu)(bu)的(de)拉伸(shen)(shen)(shen)断裂强(qiang)度(du)大(da)(da)于(yu)涤纶(lun)(lun)短(duan)纤(xian)(xian)(xian)(xian)维(wei)(wei)(wei)针(zhen)(zhen)(zhen)(zhen)刺(ci)(ci)土(tu)工(gong)(gong)布(bu)(bu)(bu)是因为单纤(xian)(xian)(xian)(xian)维(wei)(wei)(wei)的(de)强(qiang)力起到(dao)了(le)主要作(zuo)用。涤纶(lun)(lun)纺(fang)(fang)黏(nian)针(zhen)(zhen)(zhen)(zhen)刺(ci)(ci)土(tu)工(gong)(gong)布(bu)(bu)(bu)的(de)纤(xian)(xian)(xian)(xian)维(wei)(wei)(wei)是由管(guan)式气(qi)流牵伸(shen)(shen)(shen)装(zhuang)置牵伸(shen)(shen)(shen)而(er)成，纺(fang)(fang)丝(si)速度(du)达(da)到(dao)5 000 m/min，单丝(si)性能类似于(yu)化纤(xian)(xian)(xian)(xian)纺(fang)(fang)丝(si)中的(de)全拉伸(shen)(shen)(shen)丝(si)，因而(er)其强(qiang)力较高。同时，由于(yu)涤纶(lun)(lun)纺(fang)(fang)黏(nian)针(zhen)(zhen)(zhen)(zhen)刺(ci)(ci)土(tu)工(gong)(gong)布(bu)(bu)(bu)中的(de)纤(xian)(xian)(xian)(xian)维(wei)(wei)(wei)是长(zhang)丝(si)，在受到(dao)外界(jie)拉伸(shen)(shen)(shen)时，单纤(xian)(xian)(xian)(xian)维(wei)(wei)(wei)强(qiang)力的(de)贡献较短(duan)纤(xian)(xian)(xian)(xian)维(wei)(wei)(wei)大(da)(da)，且相互间的(de)缠结接触(chu)以及摩擦(ca)力大(da)(da)，从而(er)使得涤纶(lun)(lun)纺(fang)(fang)黏(nian)针(zhen)(zhen)(zhen)(zhen)刺(ci)(ci)土(tu)工(gong)(gong)布(bu)(bu)(bu)的(de)拉伸(shen)(shen)(shen)强(qiang)力大(da)(da)于(yu)短(duan)纤(xian)(xian)(xian)(xian)维(wei)(wei)(wei)针(zhen)(zhen)(zhen)(zhen)刺(ci)(ci)土(tu)工(gong)(gong)布(bu)(bu)(bu)。

在面(mian)密(mi)度(du)较(jiao)低时，涤(di)纶(lun)纺(fang)黏(nian)针刺土(tu)(tu)(tu)工布(bu)(bu)的(de)尺寸稳定性较(jiao)差，伸长率较(jiao)涤(di)纶(lun)短纤(xian)维(wei)(wei)针刺土(tu)(tu)(tu)工布(bu)(bu)大(da);而(er)面(mian)密(mi)度(du)高(gao)时，涤(di)纶(lun)短纤(xian)维(wei)(wei)针刺土(tu)(tu)(tu)工布(bu)(bu)的(de)伸长率比涤(di)纶(lun)纺(fang)黏(nian)针刺土(tu)(tu)(tu)工布(bu)(bu)大(da)。主要(yao)原(yuan)因是面(mian)密(mi)度(du)低时，土(tu)(tu)(tu)工布(bu)(bu)厚度(du)小(xiao)，加(jia)之长丝刚(gang)度(du)较(jiao)大(da)，其纤(xian)维(wei)(wei)间的(de)抱(bao)合较(jiao)短纤(xian)维(wei)(wei)之间的(de)抱(bao)合困难; 随着面(mian)密(mi)度(du)的(de)增(zeng)加(jia)，土(tu)(tu)(tu)工布(bu)(bu)厚度(du)增(zeng)大(da)，纤(xian)维(wei)(wei)之间的(de)接(jie)触增(zeng)多，长丝与(yu)周围纤(xian)维(wei)(wei)有(you)更多的(de)缠(chan)结和抱(bao)合。