He matū pūmua tūturu te rapa māori, ko te polyisoprene te wāhanga matua. Ko tōna tauira ngota ko (C5H8)n. 91% ki te 94% o ōna wāhanga he warowaihā rapa (polyisoprene), ā, ko te toenga he pūmua, he matū kore-rapa pērā i te waikawa ngako, te pungarehu, te huka, me ētahi atu. Ko te rapa māori te rapa whānui e whakamahia whānuitia ana.
Rapa whakakotahi: Ko te tikanga o te rapa whakakotahi ko te nui o te rapa maori he 95%-99.5%, ā, ka tāpirihia he iti noa o te waikawa stearic, te rapa styrene-butadiene, te rapa butadiene, te rapa isoprene, te waikura konutea, te pango waro, te peptizer rānei. Rapa whakakotahi kua parakoretia.
Ingoa Hainamana: rapa hangai
Ingoa Pākehā: rapa hangai
Whakamāramatanga: He rauemi tino pīngore me te āhua hurihuri ka taea te huri i runga i ngā matū pūmua hangai.
●Te whakarōpūtanga o te rapa
E toru ngā wāhanga matua o te rapa: te rapa māori, te rapa matū, me te rapa hangai.
Ko te rapa māori me te rapa whakakotahi ngā momo matua e kawemai ana mātou i tēnei wā; ko te rapa hangai e pā ana ki ngā mea i tangohia mai i te hinu, nō reira kāore mātou e whakaaro ki tēnei i tēnei wā.
Ko te rapa māori (rapa māori) e pā ana ki te rapa i hangaia mai i ngā tipu whakaputa rapa māori. Ka hangaia te rapa whakakotahi mā te whakaranu i te rapa māori me te iti o te rapa hangai me ētahi hua matū.
● Rapa tūturu
E ai ki ngā tukanga hanga rerekē, ka wehea te rapa māori ki te rapa paerewa me te rapa rau paowa. Ko te rapa paerewa he rapa paerewa. Hei tauira, ko te rapa paerewa o Haina ko te rapa paerewa o Haina, e whakarapopototia ana ko SCR, ā, he rite tonu ki te SVR, STR, SMR me ētahi atu.
He rerekē anō ngā momo kāpia paerewa, pērā i te SVR3L, SVR 5, SVR10, SVR20, SVR 50… me ētahi atu; e ai ki te rahi o te tau, ka nui ake te tau, ka kino ake te kounga; ka iti ake te tau, ka pai ake te kounga (ko te mea nui hei wehewehe i te pai me te kino ko te pungarehu me te nui o te paru o te hua, ka iti ake te pungarehu, ka pai ake te kounga).
Ko te kāpia pepa auahi he Ribbed Smoked Sheet, e pā ana ki tētahi wahi rapa auahi angiangi, e whakarāpopototia ana ko RSS. He rerekē tēnei whakarāpopototanga i te kāpia paerewa, ā, kāore i whakarōpūtia i runga i te wāhi i hangaia ai, ā, he rite tonu te kīanga i ngā wāhi rerekē o te hanga.
He rerekē anō ngā momo kāpia pepa auahi, RSS1, RSS2, RSS3, RSS4, RSS5, rite tonu, ko te RSS1 te kounga pai rawa atu, ko te RSS5 te kounga kino rawa atu.
● Rapa whakakotahi
Ka hangaia mā te whakaranu me te whakamahine i te rapa maori me te iti o te rapa hangai me ētahi hua matū. Ko te tauira rapa matū e whakamahia whānuitia ana ko tēnei, pērā i te rapa matū o Mareia SMR Compounded Rubber 97% SMR 20 (rapa paerewa o Mareia) + 2.5% SBR (rapa styrene butadiene, he rapa hangai) + 0.5% waikawa stearic acid).
Ko te rapa matū ka whakawhirinaki ki te rapa maori e hanga ana i tōna wāhanga matua. Ka kiia ko te rapa matū. E ai ki runga ake nei, ko te wāhanga matua ko te SMR 20, nō reira ka kiia ko te rapa paerewa Nama 20 o Mareia; kei reira anō te rapa pepa auahi me te rapa paerewa.
Wā tuku: Whiringa-ā-rangi 17-2021
