Ukuhlukaniswa kwe-Polyethylene
Ukuhlukaniswa kwe-polyethylene
I-Polyethylene ihlukaniswe nge-polyethylene ephezulu (i-HDPE), i-polyethylene ephansi (i-LDPE) kanye ne-linear low density polyethylene (LLDPE) ngokusho kwendlela ye-polymerization, isisindo samangqamuzana kanye nesakhiwo seketango.
LDPE
Izakhiwo: ayinambitheki, ayinaphunga, ayinabo ubuthi, indawo engacacile, izinhlayiya ze-waxy ezimhlophe ezimhlophe, ukuminyana cishe ngu-0.920 g/cm3, indawo encibilikayo 130℃～145℃. Ayincibiliki emanzini, incibilika kancane kuma-hydrocarbon, njll. Ingakwazi ukumelana nokuguguleka kwama-asidi amaningi nama-alkali, imunca amanzi aphansi, isengagcina ukuguquguquka emazingeni okushisa aphansi, futhi inokufakwa ugesi okuphezulu.
Inqubo Yokukhiqiza:
Kukhona ikakhulukazi izinhlobo ezimbili zendlela yeshubhu yomfutho ophezulu kanye nendlela yeketela. Ukuze unciphise izinga lokushisa lokusabela nokucindezela, isakhi senqubo ye-tubularralI-ly yamukela isiqalisi sezinga lokushisa eliphansi le-high-activity ukuze siqalise uhlelo lwe-polymerization, i-ethylene ehlanzekile kakhulu isetshenziswa njengento eyinhloko eluhlaza, i-propylene, i-propane, njll. isetshenziswa njengezilungisi zokuminyana. I-polymerization yenziwa ngaphansi kwezimo ze-330 ° C kanye ne-150-300MPa. I-polymer encibilikisiwe eqala i-polymerization ku-reactor kufanele ipholiswe futhi ihlukaniswe ngomfutho ophezulu, ukucindezela okuphakathi nokucindezela okuphansi. Ngemuva kokuhlukana, ithunyelwa endaweni yokungena ye-compressor ephezulu ye-high-pressure (30 MPa), kuyilapho igesi ejikelezayo enengcindezi ephansi ipholile futhi ihlukaniswe futhi ithunyelwe ku-compressor ye-low-pressure (0.5 MPa) ukuze igaywe kabusha, kuyilapho i-polyethylene encibilikisiwe. ithunyelwa kugranulator ngemva kokwehlukana komfutho ophezulu kanye nomfutho ophansi. Ukuze uthole i-granulation emanzini, ngesikhathi se-granulation, amabhizinisi angangeza izithasiselo ezifanele ngokuya ngezinkambu ezihlukene zohlelo lokusebenza, futhi ama-granules ayapakishwa futhi athunyelwe.
Sebenzisa:
Izindlela zokucubungula ezifana nokubunjwa komjovo, ukubunjwa kwe-extrusion, nokubunjwa kokushaywa kungasetshenziswa. Isetshenziswa kakhulu njenge-agricultural ifilimu, ifilimu yokupakisha yezimboni, ifilimu yokupakisha imithi nokudla, izingxenye zemishini, izidingo zansuku zonke, izinto zokwakha, izintambo, ukuvala amakhebula, ukunamathela kanye nephepha lokwenziwa.
LLDPE
Izakhiwo: Ngenxa yokuthi izakhiwo zamangqamuzana e-LLDPE ne-LDPE ngokusobala zihlukile, izakhiwo nazo zihlukile. Uma kuqhathaniswa ne-LDPE, i-LLDPE inokumelana okuhle kakhulu nokucindezeleka kwemvelo kanye nokufakwa kukagesi, ukumelana nokushisa okuphezulu, ukumelana nomthelela kanye nokumelana nokubhoboza.
Inqubo Yokukhiqiza:
I-LLDPE resin ikhiqizwa ikakhulukazi imishini ye-polyethylene egcwele ukuminyana, futhi izinqubo zokukhiqiza ezimele inqubo ye-Innovene kanye nenqubo ye-Unipol ye-UCC.
Sebenzisa:
Ngokubumba umjovo, i-extrusion, i- blow molding nezinye izindlela zokubumba, ukukhiqizwa kwamafilimu, izidingo zansuku zonke, amapayipi, izintambo nezintambo, njll.
I-HDPE
Izakhiwo: Natural, izinhlayiya eziyisilinda noma ze-oblate, izinhlayiya ezibushelelezi, usayizi wezinhlayiyana kufanele ube ngu-2 mm ~ 5 mm kunoma iyiphi indlela, kungabikho ukungcola kwemishini, i-thermoplastic. Impushana iyimpushana emhlophe, futhi umkhiqizo ofanelekayo uvunyelwe ukuba nophuzi kancane umbala. Ayincibiliki ezincibilikisini ezivamile ekamelweni lokushisa, kodwa ingakhukhumala kuma-aliphatic hydrocarbons, ama-hydrocarbon anephunga elimnandi nama-halogenated hydrocarbons lapho ithintwa isikhathi eside, futhi incibilika kancane ku-toluene ne-acetic acid emazingeni okushisa angaphezu kuka-70 °C. I-oxidation kwenzeka lapho kushisa emoyeni nangaphansi kwethonya lokukhanya kwelanga. Imelana nokuguguleka kwe-asidi ne-alkali. Inomunca amanzi aphansi, isengakwazi ukugcina ukuguquguquka kwezinga lokushisa eliphansi, futhi inokushisa okuphezulu kagesi.
Inqubo Yokukhiqiza:
Izinqubo ezimbili zokukhiqiza zamukelwa: indlela yesigaba segesi kanye nendlela ye-slurry.
Sebenzisa:
Ukusebenzisa ukubunjwa komjovo, ukubunjwa kokushaywa, ukubunjwa kwe-extrusion, i-rotomolding nezinye izindlela zokubumba ukukhiqiza imikhiqizo yefilimu, izidingo zansuku zonke kanye nokusetshenziswa kwezimboni zobukhulu obuhlukahlukene beziqukathi ezingenalutho, amapayipi, amateyipu e-calendering nokubopha amateyipu okupakisha, izintambo, amanetha okudoba kanye nemicu ephothiwe, Intambo nekhebula njll.
Ukuhlukaniswa kwe-Polyethylene