Hanyoyi da dama na gano roba da aka saba amfani da su

1. Juriya ga gwajin ƙara nauyi na matsakaici

Ana iya ɗaukar samfurin da aka gama, a jiƙa shi a cikin wani abu ko da dama da aka zaɓa, a auna shi bayan wani takamaiman zafin jiki da lokaci, kuma ana iya fahimtar nau'in kayan gwargwadon canjin nauyi da ƙimar canjin tauri.

Misali, a nutsar da shi a cikin mai mai digiri 100 na tsawon awanni 24, NBR, robar fluorine, ECO, CR suna da ƙaramin canji a inganci da tauri, yayin da NR, EPDM, SBR sun ninka nauyi fiye da ninki biyu kuma suna canzawa sosai a tauri, kuma faɗaɗar girma a bayyane take.

2. Gwajin tsufar iska mai zafi

Ɗauki samfura daga kayayyakin da aka gama, a saka su a cikin akwatin tsufa na kwana ɗaya, sannan a lura da abin da ke faruwa bayan tsufa. Ana iya ƙara tsufa a hankali a hankali. Misali, CR, NR, da SBR za su yi rauni a digiri 150, yayin da NBR EPDM har yanzu yana da laushi. Lokacin da zafin jiki ya tashi zuwa digiri 180, NBR na yau da kullun zai yi rauni; kuma HNBR zai yi rauni a digiri 230, kuma robar fluorine da silicone har yanzu suna da kyakkyawan sassauci.

3. Hanyar ƙonewa

Ɗauki ƙaramin samfuri ka ƙona shi a iska. Ka lura da abin da ke faruwa.

Gabaɗaya dai, robar fluorine, CR, da CSM ba su da wuta, kuma ko da harshen wuta yana ƙonewa, ya fi ƙanƙanta fiye da NR da EPDM na gabaɗaya. Tabbas, idan muka duba da kyau, yanayin ƙonewa, launi, da ƙamshi suma suna ba mu bayanai da yawa. Misali, idan aka haɗa NBR/PVC da manne, idan akwai tushen wuta, wutar tana fashewa kuma tana kama da ruwa. Ya kamata a lura cewa wani lokacin manne mai hana harshen wuta amma mara halogen shi ma zai kashe kansa daga wutar, wanda ya kamata a ƙara yin la'akari da shi ta wasu hanyoyi.

4. Auna takamaiman nauyi

Yi amfani da ma'aunin lantarki ko ma'aunin nazari, daidai gwargwado zuwa gram 0.01, da gilashin ruwa da gashi.

Gabaɗaya dai, robar fluorine tana da mafi girman nauyi, sama da 1.8, kuma yawancin samfuran CR ECO suna da babban rabo sama da 1.3. Ana iya la'akari da waɗannan manne.

5. Hanyar ƙarancin zafin jiki

Ɗauki samfurin samfurin da aka gama sannan a yi amfani da busasshen kankara da barasa don ƙirƙirar yanayi mai kyau na cryogenic. Jiƙa samfurin a cikin yanayin zafi mai ƙarancin zafi na minti 2-5, a ji laushi da tauri a zafin da aka zaɓa. Misali, a -40 digiri, ana kwatanta gel silica da robar fluorine iri ɗaya da zafin jiki mai ƙarfi da juriya ga mai, kuma gel silica yana da laushi.