Umhloli we-air permeability wenzelwe futhi wakhiwe ngephepha lesikhwama sikasimende, isikhwama sephepha, ikhebula lekhebula, iphepha lokukopisha kanye nephepha lokuhlunga lezimboni, njll., ukukala usayizi wokungena komoya, ithuluzi lifanele ukungena komoya phakathi kwe-1 × 10-2~1×102um/ (pa.s), hhayi okwephepha elinendawo enkulu emaholoholo.
Okusho ukuthi, ngaphansi kwezimo ezishiwo, isikhathi seyunithi kanye nomehluko wokucindezela kweyunithi, indawo yeyunithi yephepha ngokusebenzisa ukugeleza komoya okumaphakathi. Izinhlobo eziningi zephepha, njengephepha lesikhwama sikasimende, isikhwama sephepha, ikhebula lephepha, iphepha lokukopisha kanye nephepha lokuhlunga lezimboni, zidinga ukukala ukufinyeleleka kwalo, leli thuluzi lakhiwe futhi lenzelwe zonke izinhlobo zephepha. Leli thuluzi lifanele ukungena komoya phakathi kwe-1 × 10-2 ~ 1 × 102um/ (pa. S), alifaneleki ebusweni bephepha elikhulu elimaholoholo.
Imitha yokuphefumula ihambisana ne-QB/T1667-98 “I-Paper and cardboard breathability Tester”, GB/T458-1989 “Indlela yokunquma ukuphefumula kwephepha nekhadibhodi” (Schobol). I-Iso1924/2-1985 QB/T1670-92 namanye amazinga afanelekile.
Thumela umlayezo wakho kithi:
Isikhathi sokuthumela: Feb-23-2022
