Kei a koe te mōhio ki tēheaLinear low density polyethyleneko? I tēnei wā, e kī ana he nui me te rorohiko, engari kaua e whakamā, he whakamāramatanga hira e tū mai nei! Te kaihoko ko te mea mārama, āe, ko Yuezheng te kāwanatanga e hanga nei i tēnei materiale e pātata ana ki ngā mahi katoa i ō tātou wā. Ko tēnei tuhinga ka awhina koe ki te mōhio ki te LLDPE—hei aha ia, ko ngā take e toru e taea ana te whakapā, kei hea ia i roto i ngā mea e whakamahi ana koe i ngā rā o tō ao, me pēhea rānei te hanga i aua i ō māra.
Tētahi o ngā plastikita e whiwhi ana te whakaaro mō ngā mahi o tēnā rā, he linear low density polyethylene resin, rānei ko te LLDPE. E whai pūtake ana ngā LLDPE i te hanga o ngā hua rerekē pērā i ngā kaihakari, ngā kete, me ngā kāri. He mea whakamārama tōna ingoa 'linear' nō te mea he tūpato ngā whatu iti nei - e mōhiotia ana hei molekūra - kei roto i tētahi rārangi toru. Nā reira, ka rongo koe i a tangata kē e kōrero ana ki te LLDPE, nā tētahi āhuatanga waea tēnei e whakaputa mai ana i tētahi mea waea i waenganui i ngā momo plastiki tuatahi. Hei tauira, kāore te LLDPE i te mea pai rawa atu i te HDPE (high density polyethylene) me te low density polyethylene, LDPE. Ko te LLDPE he mea roa, he mea kaha, he mea pātata, nā reira e hiahia ana ki te whakamahi i a ia i runga i ngā tūmomo.
Ko te LLDPE he mea nui rawa atu i ngā āhuatanga, arā, ko tēnei he mea hērahi me te kina mōhuhu. Ko tēnei e hīnā ana he mea ka taea te whakapūmau me te whakawhitinga ki te āhua o te mea e hiahia ana kia mau ai, ki te kore e pātata atu i te rereke. Whakaarohia te whakaputu mai i tētahi koha me te whiuwhiu poroporo; ko tēnei tō te mahi a te LLDPE! Ka taea e ia te whakauru i ngā mea katoa, mai i ngā papaaka ki ngā whare. He mea nui anō hoki te LLDPE, ka tiakina e ia ngā taonga i roto. Hei tauira, kāore ia i te māku ki te whakamahue, ā, ka taea e ia te tahuri i ngā momo rongoā ki te kore e whakarereke. Nā tēnei kei te pai rawa te LLDPE i te tiaki i ngā hua.
He nui ngā painga o te whakamahi i te LLDPE mo te whakapakoko i waenganui i ngā whenua, pērā i te kākano, te karā, me ērā atu whakahaere. Ki runga i tērā, ko tētahi o ngā hiranga matua he mea hauhunga iti te LLDPE. Ko tēnei e hīnā ana he mea kāore i te whāiti i te mana o te huaruaro i ngā hua e tuku nei, ka whakaiti haere i ngā utu whakatuku. Ka whakaiti hoki ngā hua iti i te wā e tatauranga ana, ka whakangungu atu i te hiahia ki te māngai motokā i te wā o te tuku, e pai ake ana tēnei hei whakamana i te taiao.
Kāore te LLDPE e iti ki te tākai, e whakamahia whānuitia ana ki ētahi atu tono maha. I roto i te ahuwhenua, hei tauira, ka taea te hanga i nga papa o te roto e pupuri ana i te wai me nga taupoki o te whare kakara e tiaki ana i nga huawhenua mai i nga waahanga. Ka whakamahia i roto i te geosynthetics, ina koa i roto i nga geomembranes me nga geotextiles i roto i te waahi tuku, te taiepa, me etahi atu kaupapa hanga nui. LLDPE i roto i te tono hauora Ko te whakamahinga nui o te LLDPE e whakamahia ana i roto i te rongoā ko te hanga i nga miihini whakakorenga, putea, me nga ngongo. Hei tauira, ka whakamahia e te rāngai waka te LLDPE hei hanga i ngā ipu wahie, i ngā papa tatau, tae noa ki ngā whitiki haumaru, he mea nui katoa ēnei ki tō haumaru.
I mea nei ko te aha tēnei LLDPE me te āheinga mā tātou ki te whakamahi, tēnā me tūmari atu tātou ki te whakaaetanga i tēnei! Ka whakamahia te mōhiotanga o te polymerization hei hanga i te LLDPE. Ko tēnei he kupu matatika e hīkohia ana he mea kua karangahia ai ko te hā o te ethylene hei whai wāhi i ngā waehanga nui me te wehewehe. Ka hanga tēnei kaupapa he takotoranga roa o ngā molekūra e hanga ai i te materia o te pākete. Ka taea e tēnei polymer ki te tuhituhi hei whata rānei, ki te hanga i ētahi āhua atu, pērā i ngā pereki hei whakamahia i muri iho.
Nō reira ka whakamahia tātou he mea kī tēnei ko te extrusion hei hanga i te LLDPE ki te āhua tika. E hīkohia ana he mea kāore i mōhio ko te LLDPE, ka uhi, ka tohu mai i runga i tētahi kawe ki te hanga i te āhua pai. Ki wātea, ka taka anō tātou i te LLDPE ki ētahi whenua atu hei whakapakari i ana āhuatanga. Pērā i te mea ka hanga tātou iho, ka tāpiri tātou i te kiriwhara, ka mahia e tātou he pai ake rānei, he whakawhanaunga rānei, he whakanuiake rānei i te ahua.
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