Ko te rapa hangai tētahi o ngā rauemi hangai matua e toru, ā, e whakamahia whānuitia ana i roto i ngā āhuatanga maha o te ahumahi, te parepare whenua, te kawe waka me te oranga o ia rā. Ko te rapa hangai mahi-teitei me te whai hua he rauemi matua matatau e tika ana mō te whanaketanga o te ao hou, ā, he rauemi rautaki nui hoki mō te whenua.
Ko ngā rauemi rapa hanga motuhake e pā ana ki ngā rauemi rapa he rerekē i ngā rauemi rapa whānui, ā, he āhuatanga motuhake anō hoki pērā i te ātete ki te pāmahana teitei me te pāmahana iti, te ātete ki te koroheketanga, te ātete ki te tango i ngā matū, me te ātete ki ngā matū, ko te nuinga ko te rapa nitrile hauwai (HNBR), te vulcanizate thermoplastic (TPV), te rapa silicone, te rapa fluorine, te rapa fluorosilicone, te rapa acrylate, me ētahi atu. Nā ōna āhuatanga motuhake, kua noho ngā rauemi rapa motuhake hei rauemi matua e tika ana mō te whakawhanaketanga o ngā rautaki ā-motu nui me ngā mara hou pērā i te rererangi, te ahumahi tiaki whenua me te hōia, ngā mōhiohio hiko, te pūngao, te taiao, me te moana.
1. Rapa nitrile hauwai (HNBR)
Ko te rapa nitrile hauwai he rauemi rapa tino mākū i whiwhi mā te hauwai i ngā waeine butadiene i runga i te mekameka rapa nitrile hei whakapai ake i te ātete wera me te ātete tawhito o te rapa nitrile butadiene (NBR). , ko tōna āhuatanga matua he taea te whakamahi mō te wā roa i te 150 ℃, ā, ka taea tonu te pupuri i ngā āhuatanga ā-tinana me te ā-mīhini teitei i te pāmahana teitei, ka taea te whakatutuki i ngā whakaritenga motuhake o te ātete pāmahana teitei me te ātete matū o ngā rauemi i roto i te motuka, te rererangi, te mara hinu me ētahi atu mara. Ko ngā whakaritenga, e whakamahia whānuitia ana, pērā i ngā hiri hinu motuka, ngā wāhanga pūnaha wahie, ngā whitiki tuku motuka, ngā pouaka pupuri keri me ngā piston mō te paru, ngā roera rapa tā me te kakahu, ngā hiri rererangi, ngā rauemi mimiti ru, me ētahi atu.
2. Te Whakarewatanga Whakawera Kirihou (TPV)
Ko ngā whakamomona werawera kirihou, e whakarāpopototia ana ko ngā TPV, he akomanga motuhake o ngā elastomer werawera kirihou e hangaia ana mā te "whakamomona hihiri" o ngā ranunga kore e taea te whakaranu o ngā kirihou werawera me ngā elastomer, arā, ko te kōwhiringa o te wāhanga elastomer i te wā e whakaranua ana te rewa me te hononga whakawhiti irahiko kirihou werawera. Ko te whakamomona i te wāhanga rapa i te aroaro o te kaihoko whakawhiti (tērā pea he peroxides, diamines, whakatere whanariki, me ētahi atu) i te wā e whakaranua ana te rewa me ngā kirihou werawera ka hua ake he matrix thermoplastic whakamomona hihiri tonu e titoa ana e te rapa whakawhiti kua marara. Ko ngā matūriki i roto i te wāhanga, te whakamomona hihiri ka hua ake te pikinga o te matotoru rapa, e whakatairanga ana i te hurihanga wāhanga me te whakarato i te āhua maha-wāhanga i roto i te TPV. He rite te mahi a te TPV ki te rapa whakatakoto werawera me te tere tukatuka o ngā kirihou werawera, e whakaatuhia ana i roto i te ōwehenga mahi/utu teitei, te hoahoa ngāwari, te taumaha mama, te whānuitanga pāmahana whakahaere whānui, te tukatuka ngāwari, te kounga hua me te pumau o te taha me te hangarua, e whakamahia whānuitia ana i roto i ngā wāhanga motuka, te hanga hiko, ngā hiri me ētahi atu mara.
3. Rapa silicone
He momo rapa hanga motuhake te rapa silicone, he mea hanga mai i te polysiloxane raina i konatunatua ki ngā whakakī whakakaha, ngā whakakī mahi me ngā tāpiringa, ā, i muri i te whakamomona i raro i ngā āhuatanga whakamahana me te pēhanga ka huri hei elastomer rite ki te whatunga. He tino pai tōna ātete ki te pāmahana teitei me te iti, te ātete ki te rangi, te ātete ki te ozone, te ātete ki te pewa, te whakamarumaru hiko, te ātete ki te makuku, te urunga hau teitei me te koretake o te tinana. He whānuitia ōna tono i roto i ngā ahumahi hou, hikohiko me te hiko, te motuka, te hanga, te hauora, te tiaki whaiaro me ētahi atu mara, ā, kua waiho hei rauemi mahi-teitei matatau e kore e taea te whakakapi i roto i te rererangi, te ahumahi tiaki me te hōia, te hanga atamai me ētahi atu mara.
4. Rapa kōwhai
Ko te rapa fluorine e pā ana ki tētahi rauemi rapa kei roto he fluorine kei roto ngā ngota fluorine i runga i ngā ngota waro o te mekameka matua, o ngā mekameka taha rānei. Ko ōna āhuatanga motuhake ka whakatauhia e ngā āhuatanga hanganga o ngā ngota fluorine. Ka taea te whakamahi i te rapa fluorine i te 250°C mō te wā roa, ā, ka taea e te pāmahana ratonga mōrahi te eke ki te 300°C, ko te pāmahana ratonga rohe o te EPDM tuku iho me te rapa butyl he 150°C anake. Haunga te ātete pāmahana teitei, he tino pai te ātete hinu, te ātete matū, te ātete waikawa me te kawakore o te rapa fluoro, ā, ko tōna mahi whānui te mea pai rawa atu i roto i ngā rauemi elastomer rapa katoa. Ko te nuinga o te wā ka whakamahia mō te ātete hinu o ngā rōkete, ngā pere, ngā waka rererangi, ngā kaipuke, ngā motuka me ētahi atu waka. Ko ngā mara motuhake pēnei i te hiri me ngā paipa ātete hinu he rauemi matua nui mō te ōhanga ā-motu me ngā ahumahi tiaki ā-motu me te hōia.
5. Rapa Acrylate (ACM)
Ko te rapa acrylate (ACM) he elastomer i whiwhihia mā te copolymerization o te acrylate hei monomer matua. Ko tōna mekameka matua he mekameka waro kua kukū, ā, ko ōna rōpū taha he rōpū ester polar. Nā tōna hanganga motuhake, he maha ngā āhuatanga pai, pērā i te ātete wera, te ātete koroheketanga, te ātete hinu, te ātete ozone, te ātete UV, me ētahi atu, ko ōna āhuatanga miihini me ngā āhuatanga tukatuka he pai ake i te rapa fluororubber me te silicone, ā, he tino pai tōna ātete wera, te ātete koroheketanga me te ātete hinu. i roto i te rapa nitrile. He whānuitia te whakamahinga o te ACM i roto i ngā taiao pāmahana teitei me te ātete hinu, ā, kua noho hei rauemi hiri i whakawhanakehia me te whakatairangahia e te umanga motuka i ngā tau tata nei.
Wā tuku: Hepetema-27-2022
