Umhloli we-air permeability wenzelwe kwaye wenziwa kwiphepha le-samente, isikhwama sephepha, i-cable paper, ikopi yephepha kunye nephepha lokucoca i-industrial, njl. 10-2 ~ 1 × 102um / (pa.s), kungekhona iphepha kunye nomhlaba omkhulu orhabaxa.
Okokuthi, phantsi kweemeko ezichaziweyo, ixesha leyunithi kunye nokwahlukana koxinzelelo lweyunithi, indawo yeyunithi yephepha ngomyinge wokuhamba komoya. Iindidi ezininzi zephepha, ezifana nephepha le-samente, isikhwama sephepha, i-cable paper, ikopi yephepha kunye nephepha lokucoca i-industrial, kufuneka lilinganise ukufikeleleka kwayo, esi sixhobo siyilwe kwaye senzelwe zonke iintlobo zephepha. Esi sixhobo silungele ukunyanzeliswa komoya phakathi kwe-1 × 10-2 ~ 1 × 102um / (pa. S), ayifanelekanga kumphezulu wephepha elikhulu elirhabaxa.
Imitha yokuphefumula ihambelana ne-QB / T1667-98 "Iphepha kunye nekhadibhodi yokuphefumula iTester", i-GB / T458-1989 "Iphepha kunye nekhadibhodi yokumisela ukuphefumula ukuphefumula Indlela" (Schobol). I-Iso1924/2-1985 QB/T1670-92 kunye neminye imigangatho efanelekileyo.
Thumela umyalezo wakho kuthi:
Ixesha lokuposa: Feb-23-2022
