He aha ngā āhuatanga o te Polyvinyl Chloride (PVC)?

Ko ētahi o ngā āhuatanga tino nui o te Polyvinyl Chloride (PVC) ko:

1. Kiato:He tino mātotoru te PVC ki te whakaritea ki te nuinga o ngā kirihou (tata ki te 1.4 te taumaha motuhake)
2. Ōhanga:He māmā noa te hoko mai i te PVC, ā, he iti hoki te utu.
3. Te pakeketanga:He pai te tūranga o te PVC mārō mō tōna pakeketanga me tōna roa.
4. Kaha:He tino kaha te kaha o te PVC pakari.

He rauemi "thermoplastic" (he rerekē ki te "thermoset") te Polyvinyl Chloride, e pā ana ki te āhua o te urupare a te kirihou ki te wera. Ka wai ngā rauemi thermoplastic i tō rātou ira rewa (he awhe mō te PVC i waenga i te 100 nekehanga Celsius tino iti me ngā uara teitei ake pērā i te 260 nekehanga Celsius i runga i ngā tāpiringa). Ko tētahi āhuatanga matua whai hua mō ngā thermoplastic ko te taea te whakamahana ki tō rātou ira rewa, te whakamatao, me te whakamahana anō me te kore e tino pirau. Engari i te tahuna, ka taea e ngā thermoplastic pērā i te polypropylene te waimeha kia ngāwari te werohanga i a rātou, kātahi ka hangarua. He rerekē, ka taea anake te whakamahana i ngā kirihou thermoset kotahi (i te nuinga o te wā i te tukanga werohanga). Mā te whakamahana tuatahi ka whakatōngia ngā rauemi thermoset (he rite ki te epoxy 2-wāhanga), ka puta he huringa matū e kore e taea te huri. Mena ka ngana koe ki te whakamahana i te kirihou thermoset ki te pāmahana teitei mō te wā tuarua, ka tahuna noa iho. Nā tēnei āhuatanga ka kore e pai ngā rauemi thermoset mō te hangarua.

He whānuitia ngā whakamahinga me ngā painga o te PVC puta noa i ngā ahumahi maha, i roto i ōna āhua pakari me ōna āhua ngāwari. Ina koa, he tino matotoru te PVC pakari mō te kirihou, ā, he tino mārō, he tino kaha hoki. He ngāwari hoki te wātea me te ohanga, ā, i te whakakotahitanga me ngā āhuatanga roa o te nuinga o ngā kirihou, he mea ngāwari ki te whiriwhiri mō ngā whakamahinga ahumahi maha pērā i te hanga.

He tino pakari te PVC, ā, he mama hoki, he mea ātaahua mō te hanga whare, te mahi paipa, me ētahi atu mahi ahumahi. Hei tāpiri, nā te nui o te haukini i roto i tēnei rauemi, ka ātete ki te ahi, koia tētahi atu take i rongonui ai i roto i ngā momo ahumahi.