Kukula kwa nsalu zopanda nsalu

Nsalu zosalukidwaamapangidwa ndi ulusi wolunjika kapena mwachisawawa.Ndi mbadwo watsopano wa zipangizo zotetezera zachilengedwe, zomwe zimakhala zotetezedwa ndi chinyezi, zopumira, zosinthika, zopepuka, zosayaka, zosavuta kuwola, zopanda poizoni komanso zosakwiyitsa, zolemera mumtundu, zotsika mtengo, zowonongeka, ndi zina zotero. Mwachitsanzo, ma polypropylene (pp material) granules amagwiritsidwa ntchito kwambiri ngati zida zopangira, zomwe zimapangidwa ndi njira imodzi yosalekeza ya kutentha kwambiri kusungunuka, kupota, kuyala, kukanikiza kotentha ndi kukulunga.Amatchedwa nsalu chifukwa cha maonekedwe ake komanso zinthu zina.
Pakali pano, ulusi wopangidwa ndi anthu umalamulirabe kupanga nsalu zopanda nsalu, ndipo izi sizidzasintha kwambiri mpaka 2007. 63% ya ulusi womwe umagwiritsidwa ntchito munsalu zopanda nsalukupanga padziko lonse ndi polypropylene, 23% ndi poliyesitala, 8% ndi viscose, 2% ndi akiliriki CHIKWANGWANI, 1.5% polyamide, ndipo otsala 3% ndi ulusi wina.
M'zaka zaposachedwapa, ntchito yansalu zosalukidwamuzinthu zoyamwitsa zaukhondo, zida zamankhwala, magalimoto oyendera, ndi zovala za nsapato zakula kwambiri.
Kukula kwamalonda kwa ulusi wopangidwa ndi anthu komanso kagwiritsidwe ntchito kaukadaulo kansalu zosalukidwa: Chifukwa cha kukhazikitsidwa kwa mapangano azachuma padziko lonse lapansi, malonda a ma microfibers, ulusi wophatikizika, ulusi wosawonongeka ndi mitundu yatsopano ya ulusi wa polyester wakula.Izi zimakhudza kwambiri nsalu zopanda nsalu, koma zimakhala ndi zotsatira zochepa pa zovala ndi nsalu zoluka.Kusintha kwa nsalu ndi zinthu zina: Izi zikuphatikizapo nsalu zosalukidwa, nsalu zoluka, mafilimu apulasitiki, thovu la polyurea, zamkati zamatabwa, zikopa, ndi zina zotero. Izi zimatsimikiziridwa ndi mtengo ndi zofunikira za ntchito.Kukhazikitsidwa kwa njira zatsopano zopangira ndalama zambiri komanso zogwira mtima: kugwiritsa ntchito nsalu zatsopano zopanda nsalu zopangidwa ndi ma polima, komanso kukhazikitsidwa kwa ulusi wapadera ndi zowonjezera zosapanga nsalu.

Zingwe zazikulu zitatu zomwe zimagwiritsidwa ntchito popanga nsalu zopanda nsalu ndi ulusi wa polypropylene (62% ya zonse), ulusi wa polyester (24% wa onse) ndi ulusi wa viscose (8% ya onse).Kuyambira 1970 mpaka 1985, viscose fiber idagwiritsidwa ntchito kwambiri popanga zinthu zopanda nsalu.Komabe, m'zaka zaposachedwa za 5, kugwiritsa ntchito ulusi wa polypropylene ndi ulusi wa poliyesitala wayamba kulamulira m'munda wazinthu zamayamwidwe aukhondo ndi nsalu zamankhwala.Pamsika woyambirira wopanga nsalu zopanda nsalu, kugwiritsidwa ntchito kwa nayiloni kumakhala kwakukulu kwambiri.Kuyambira 1998, kugwiritsidwa ntchito kwa acrylic fiber kwakula, makamaka pakupanga zikopa zopanga.