He maha ngā tikanga tautuhi rapa noa

1. Te ātete ki te whakamātautau taumaha waenga

Ka taea te whakamātautau i te hua kua oti, te ruku ki roto i tētahi, i ētahi rānei rauemi kua tīpakohia, te paunatia i muri i tētahi pāmahana me tētahi wā kua whakaritea, ā, ka taea te whakatau i te momo rauemi i runga i te tere huringa taumaha me te tere huringa pakeke.

Hei tauira, ki te rumakina ki te hinu 100 nekehanga mō ngā hāora 24, ka iti te rerekētanga o te kounga me te pakeke o te NBR, te rapa fluorine, te ECO, me te CR, engari ka nui ake te taumaha o te NR, EPDM, me te SBR, ā, ka nui ake te rerekētanga o te pakeke, ā, ka kitea te whānui o te rōrahi.

2. Whakamātautau koroheketanga hau wera

Tangohia ngā tauira mai i ngā hua kua oti, ka whakanohoia ki roto i te pouaka pakeke mō te rā kotahi, ka mātakitaki i te āhuatanga i muri i te pakeketanga. Ka taea te whakanui haere i te pakeketanga āta haere. Hei tauira, ka pakarukaru te CR, te NR, me te SBR i te 150 nekehanga, ko te NBR EPDM kei te mau tonu te pīngore. Ina piki te pāmahana ki te 180 nekehanga, ka pakarukaru te NBR noa; ā, ka pakarukaru anō hoki te HNBR i te 230 nekehanga, ā, he pai tonu te pīngore o te rapa fluorine me te silicone.

3. Tikanga tahunga

Tangohia he tauira iti ka tahuna ki te rangi. Mātakihia te āhuatanga.

I te nuinga o te wā, kāore he ahi i roto i te rapa fluorine, te CR, me te CSM, ā, ahakoa kei te mura te mura, he iti ake i te NR me te EPDM whānui. Ae, ki te tirohia pai tātou, he nui ngā kōrero e homai ana e te āhua o te mura, te tae, me te kakara. Hei tauira, ina whakakotahihia te NBR/PVC ki te kāpia, ina he pūtake ahi, ka pupuhi te ahi, ā, ka rite ki te wai. Me mōhio ko ētahi wā ka tineia anō hoki te kāpia ārai mura engari kāore he halogen i te ahi, me whakamārama anō tēnei mā ētahi atu huarahi.

4. Te ine i te taumaha motuhake

Whakamahia he tauine hiko, he pauna tātari rānei, he tika ki te 0.01 karamu, me tētahi karāhe wai me tētahi makawe.

I te nuinga o te wā, ko te rapa fluorine te mea tino kaha te taumaha, neke atu i te 1.8, ā, ko te nuinga o ngā hua CR ECO he nui ake i te 1.3. Ka taea te whakaaro ki ēnei kāpia.

5. Tikanga pāmahana iti

Tangohia he tauira mai i te hua kua oti, ka whakamahia he huka maroke me te waipiro hei hanga i tētahi taiao e tika ana mō te waikura. Tukua te tauira ki roto i tētahi taiao pāmahana iti mō te 2-5 meneti, ka rongo i te ngawari me te pakeke i te pāmahana kua tohua. Hei tauira, i te -40 nekehanga, ka whakatauritea te kiripaka me te rapa fluorine e rite ana te pāmahana teitei me te ātete hinu, ā, ka ngawari ake te kiripaka.