1. Kusefa kushanda zvakanaka.Iko kusefa kwekapfupi fiber gumbeze sefa zvinhu kwakakwira kupfuura iyo refu fiber jira sefa zvinhu.Paunenge uchichenesa guruva, zvitete zvesefa zvinhu zvinonyanya kukuvadza iyo yekutanga guruva layer pane gobvu sefa zvinhu, zvichikonzera kudzikira kwekuita kusefa.

2. Dzvinyiriro inodonha.Kurasikirwa kwekumanikidzwa kwesefa zvinhu kunofanirwa kuderedzwa zvakanyanya sezvinobvira.Kazhinji, kudonhedzwa kwekudzvanywa kwesefa midhiya imwe odha yehukuru idiki pane iyo kana paine guruva layer, uye inogona kutofuratirwa.

3. Kushivirira guruva.Iyo guruva simba inoenderana neporosity uye kupera kweiyo sefa zvinhu, iyo inosarudza nguva yekuchenesa uye nekudaro inokanganisa hupenyu hwebasa resefa zvinhu.Kazhinji, zvinokurudzirwa kufunga nezve kushandisa sefa midhiya ine yakakwira guruva, senge inonzwa sefa midhiya.

4. Kufema.Inotsanangurwa sechiyero cheiyo chaiyo vhoriyamu yekuyerera mwero weflue gasi kunzvimbo yejira resefa, inozivikanwawo seyero yejira regesi.Musiyano wekumanikidza wekugadzirisa kupinza kwemhepo munyika yedu ndeye 127Pa.Mhepo permeability kazhinji inoreva kupindirana kwemhepo kwezvinhu zvakachena sefa.Pese pazvinogoneka, sefa midhiya ine yakakwira permeability inofanirwa kusarudzwa kudzivirira kuwedzera kwekudonha kwekumanikidza.

5. Kuramba kwekushisa.Ndicho chinhu chikuru pakusarudza sefa midhiya - yakakwirira-tembiricha inodzivirira sefa midhiya inogona kudzoreredza kupisa simba uye kuchengetedza simba.Uye inogona kurerutsa michina yekutonhodza.

6. Mechanical performance.Iyo sefa zvinhu zvinofanirwa kuve nemabhenefiti senge kuramba kuvharika, kukotama, uye kupfeka, kunyanya kupfeka kuramba, iyo inotaridza hupenyu hwesevhisi hwesefa zvinhu.