Ko te Polyurethane (PU), te ingoa katoa o te polyurethane, he matū pūmua, i hangaia i te tau 1937 e Otto Bayer me ētahi atu. E rua ngā wāhanga matua o te Polyurethane: te polyester me te polyether. Ka taea te hanga hei kirihou polyurethane (ko te pahuka te nuinga), ngā muka polyurethane (e mōhiotia ana ko te spandex i Haina), te rapa polyurethane me ngā elastomers. He rauemi pūmua te Polyurethane e pai ana mō te whakamahi hei taupoki wira i roto i te hanga wira ahumahi.
Ko ngā painga matua o ngā wira polyurethane e whai ake nei:
Tuatahi, ko te mahi a te awhe whakarerekētanga
Ka taea te whakarerekē i ētahi tohu mahi ā-tinana, ā-mīhini hoki mā te whiriwhiri i ngā rauemi mata me ngā tātai, i roto i tētahi whānuitanga o ngā whakarerekētanga ngāwari, kia tutuki ai ngā whakaritenga ahurei a te kaiwhakamahi mō te mahi a te hua.
Tuarua, he ātete pai ki te pakū
I te aroaro o te wai, te hinu me ētahi atu āhuatanga mahi mākū, he maha ngā wā ka nui ake te ātete o ngā wīra polyurethane ki te kakahu i ngā rauemi rapa noa. He ātete ngā rauemi konganuku pērā i te maitai me ētahi atu mea mārō, engari kāore e tika ana kia ātete ki te kakahu!
Tuatoru, ngā tikanga tukatuka, te whānui o te whakamahinga
Ka taea te hanga i ngā elastomer polyurethane ki te rapa whānui mā te whakakirihou, te whakaranu me te whakamomona (MPU); ka taea hoki te hanga hei rapa wai, te ringihanga me te whakakirihou, te rehu rānei, te hiri me te whakakirihou porowhita (CPU); ka taea hoki te hanga hei rauemi kirikiri me ngā kirihou noa mā te werohanga, te whakaputa, te whakatārewatanga, te whakakirihou pupuhi me ētahi atu tukanga (CPU). Ko ngā wāhanga kua whakakirihoutia, kua werohia rānei, i roto i tētahi awhe pakeke, ka taea hoki te tapahi, te huri, te keri me ētahi atu tukatuka miihini.
Tuawhā, te ātete hinu, te ātete ozone, te ātete koroheketanga, te ātete irahiko, te ātete pāmahana iti, te tuku oro pai, te kaha piri kaha, te hototahitanga koiora pai rawa atu me te hototahi toto. Ko ēnei painga tonu te take e whakamahia whānuitia ai ngā elastomers polyurethane i roto i te ope taua, te rererangi, te oro, te koiora me ētahi atu mara.
Wā tuku: Oketopa-30-2023