He tino pūmau te kapia PVC i puta mai i te whakapūhuitanga nā te iti o te pumau wera me te matotoru rewa. Me whakarerekē i mua i te tukatuka hei hua kua oti. Ka taea te whakapai ake/whakarerekē i ōna āhuatanga mā te tāpiri i ētahi tāpiri, pērā i ngā whakaū wera, ngā whakaū UV, ngā kaiwhakapai kirihou, ngā whakarerekē pānga, ngā whakakī, ngā aukati mura, ngā tae, me ētahi atu.
Ko te kōwhiringa o ēnei tāpiringa hei whakarei ake i ngā āhuatanga o te pūmua ka whakawhirinaki ki te whakaritenga o te whakamahinga whakamutunga. Hei tauira:
1. Ka whakamahia ngā kirihou (Phthalates, Adipates, Trimellitate, me ētahi atu) hei whakangawari i te mahi rheological me te mahi miihini (te pakari, te kaha) o ngā hua vinyl mā te whakaara ake i te pāmahana. Ko ngā āhuatanga e pā ana ki te kōwhiringa o ngā kirihou mō te polymer vinyl ko: Hototahi polymer; iti te Hurihuri; utu.
2. He tino iti te pumau o te PVC i te wera, ā, ka āwhina ngā mea whakaū ki te ārai i te pirau o te polymer i te wā e tukatukahia ana, e whakaatuhia ana rānei ki te mārama. Ina werahia, ka tīmatahia e ngā matū vinyl he tauhohenga tango-hauora tere-ake, ā, ka whakakorea e ēnei mea whakaū te HCl i hangaia, ka whakapai ake i te roa o te ora o te polymer. Ko ngā mea hei whakaaro i te wā e whiriwhiri ana i te mea whakaū wera ko: ngā whakaritenga hangarau; te Whakaaetanga ture; te utu.
3. He maha ngā take e tāpirihia ai ngā whakakī ki ngā matū PVC. I ēnei rā, ka taea e te whakakī te noho hei tāpiri mahi tūturu mā te tuku uara i roto i ngā huarahi hou me ngā huarahi whakamere i te utu hanga iti rawa. Ka āwhina rātou ki te: whakanui ake i te pakari me te kaha, whakapai ake i te mahi pānga, tāpiri tae, opacity me te kawe hiko me te maha atu.
Ko te konupūmā kāponāte, te hauhā titanium, te uku kua whakapūkaratia, te karāhe, te talc me ētahi atu, he momo whakakī noa e whakamahia ana i roto i te PVC.
4. Ka whakamahia ngā hinu whakahinuhinu o waho hei āwhina i te rere maeneene o te PVC rewa i roto i ngā taputapu tukatuka. Ko ngā hinu whakahinuhinu o roto ia ka whakaiti i te matotoru o te rewa, ka ārai i te wera nui, ā, ka whakarite kia pai te tae o te hua.
5. Ka tāpirihia ētahi atu tāpiringa pēnei i ngā āwhina tukatuka, ngā whakarerekētanga pānga, hei whakarei ake i ngā āhuatanga ā-pūkaha me te mata o te PVC.
Wā tuku: Hakihea-13-2022