Kuwunika kwa Nsalu:

Nsalu iyi imatha kukumana ndi GB/T standard, ISO standard, JIS standard, US standard.Nsalu zonse zidzawunikiridwa 100 peresenti musanatumize malinga ndi American four point system standard.

Za nsalu yotchinga madzi

Nsalu zopanda madzi nthawi zambiri sizinyowetsa zikamavala pakagwa mvula koma sizimapereka chitetezo chokwanira ku mvula.Mosiyana ndi nsalu zopanda madzi, nsalu zotchingira madzi zimakhala ndi pores otseguka zomwe zimapangitsa kuti zizitha kulowa mpweya, mpweya wamadzi, ndi madzi amadzimadzi (pamphamvu ya hydrostatic).Pofuna kupeza nsalu yopanda madzi, chinthu cha hydrophobic chimagwiritsidwa ntchito pamtunda wa fiber.Chifukwa cha njirayi, nsaluyo imakhalabe ndi porous yomwe imalola mpweya ndi nthunzi wamadzi kudutsa.Choyipa chake ndi chakuti nyengo yovuta kwambiri nsaluyo imatuluka.
Ubwino wa nsalu za hydrophobic ndikupuma bwino, komabe, amapereka chitetezo chochepa kumadzi.Nsalu zopanda madzi zimagwiritsidwa ntchito makamaka popanga zovala zachizoloŵezi kapena ngati chovala chakunja cha zovala zopanda madzi.Hydrophobicity imatha kukhala yokhazikika (chifukwa chogwiritsa ntchito zothamangitsira madzi, DWR) kapena kwakanthawi.