Ko te moata whakamahana wera EPS he rauemi whakamahana wera māmā e whakaranua ana ki te here kore-waro, te here waro, te ranunga tāpiri, te ranunga me te konganuku māmā i roto i tētahi ōwehenga. I roto i ngā rangahau me te whakamahinga o nāianei o te moata whakamahana matūriki EPS, he nui te awe o te paura rapa ka taea te hangarua ki te mahi a te moata, ā, he nui te ōwehenga o te utu, nō reira kua noho tonu hei arotahi. Ko te mahi here o te pūnaha whakamahana pakitara waho o te moata whakamahana matūriki EPS e ahu mai ana i te here polymer, ā, ko tōna wāhanga he vinyl acetate/ethylene copolymer te nuinga. Ka taea te whakamaroke i tēnei momo polymer emulsion kia whiwhi ai i te paura rapa ka taea te hangarua. Nā te whakarite tika o te paura rapa ka taea te hangarua i roto i te hanganga, te kawe watea me te rokiroki watea, kua noho te paura wetewete mō ngā polymer hei ia whanaketanga nā te mea he whakarite tika, he kawe watea me te rokiroki watea. Ko te mahi a te moata whakamahana matūriki EPS e whakawhirinaki ana ki te momo me te nui o te polymer e whakamahia ana. He pai ake ngā āhuatanga o te paura rapa ethylene-vinyl acetate (EVA) he nui te ihirangi ethylene me te iti o te uara Tg (pāmahana whakawhiti karāhe) e pā ana ki te kaha pānga, te kaha here me te ātete wai.
Ko te arotautanga o te mahi a te paura rapa ka taea te whakamarara anō i runga i te moata nā te mea he moata ngota teitei te paura polymer me ngā rōpū porotaka. Ina whakaranua te RDP ki ngā matūriki EPS, ka piri te wāhanga kore-porotaka i roto i te mekameka matua o te paura polymer ki te mata kore-porotaka o te EPS. Kei waho ngā rōpū porotaka i roto i te polymer i runga i te mata o ngā matūriki EPS, ka huri ngā matūriki EPS mai i te hydrophobic ki te hydrophilic. Nā te whakarerekētanga o te mata o ngā matūriki EPS e te paura polymer, ka whakatauhia te raruraru he ngāwari te tūtaki ki te wai o ngā matūriki EPS. He raruraru nui, he mānu, o te wehewehe moata. I tēnei wā, i te tāpiri i te sima me te whakaoho, ka piri ngā rōpū porotaka i runga i te mata o ngā matūriki EPS ki ngā matūriki sima ka hono tata, ka whakapai ake i te mahi o te moata whakamahana EPS. Ka kitea tēnei i roto i te meka he ngāwari te whakamakuku o ngā matūriki EPS e te paru sima, ā, ka tino pai ake te kaha here i waenga i ngā mea e rua.
I muri i te hanganga o te emulsion me te paura rapa ka taea te whakamarara hei kiriata, ka taea e rātou te hanga i te kaha kume me te kaha here teitei ake i runga i ngā rauemi rerekē. Ka whakamahia hei hononga tuarua i roto i te moata hei whakakotahi me te hononga kore-waro sima, sima me te polymer. Ka whakamahia te kaha e rite ana, ka whakapai ake i te mahi a te moata. Mā te tirotiro i te hanganga moroiti o te rauemi hiato polymer-sima, e whakaarohia ana mā te tāpiri i te paura rapa ka taea te whakamarara ka taea te hanga i te kiriata polymer hei wāhanga o te pakitara poka, ka hanga i te moata hei katoa mā te kaha o roto, ka whakapai ake i te kaha o roto o te moata. Te kaha o te polymer, nā reira ka whakanui ake i te ahotea rahunga o te moata me te whakanui ake i te taumahatanga mutunga. Hei ako i te mahi roa o te paura rapa ka taea te whakamarara i roto i te moata, i tirohia mā te karu hiko matawai, i muri i te 10 tau, kāore te hanganga moroiti o te polymer i roto i te moata i rerekē, e mau tonu ana te hononga pumau, te kaha piko me te kaha pēhi me te pai o te Hydrophobic. Mā te whakamahi i te paura rapa ka taea te whakamarara anō hei kaupapa rangahau, i tirotirohia te tikanga hanga o te kaha o te here o te taera, ā, i kitea i muri i te whakamaroketanga o te pūmua hei kiriata, ka hanga e te kiriata pūmua he hononga ngāwari i waenga i te moata me te taera i tetahi taha, ā, i tetahi atu taha, ka whakanui ake ngā pūmua i roto i te moata i te nui o te hau o te moata, ka pā ki te papatahi me te mākū o te mata, ā, i te wā o te tukanga whakatakoto, ka whai pānga pai hoki ngā pūmua ki te tukanga whakamakuku me te whakahekenga o te sima. Ko ngā piripiri, ka āwhina katoa ēnei ki te whakanui ake i te kaha o te here.
Mā te tāpiri i te paura rapa ka taea te whakamarara anō ki te moata ka taea te whakapai ake i te kaha o te piri ki ētahi atu rauemi, nā te mea ka uru te wāhanga wai o te paura polymer hydrophilic me te sima whakatārewatanga ki roto i ngā pūwero me ngā capillaries o te matrix, ko te paura rapa ka uru ki roto i ngā pūwero me roto i te capillaries. Ka hangaia te kiriata o roto, ka piri pūmau ki te mata o te papa, kia pai ai te kaha o te piri i waenga i te rauemi kua whakapirihia me te papa.
Wā tuku: Pipiri-16-2023