Umugqa Wokukhipha Ipayipi Lokushisa Le-HDPE
Ipharamitha Eyinhloko Yobuchwepheshe
Ukusebenza kanye nezici
Umugqa wokukhiqiza ipayipi lokufaka umoya uklanywe ngesikhunta sepayipi lokufaka umoya esikhethekile se-PE, ingcindezi yokukhipha umoya izinzile, futhi ubukhulu bepayipi elinodonga oluncane buyafana. Ijubane lokukhipha umoya liyashesha, umphumela wohlobo oluvunguziwe uthuthuke kakhulu, indawo ikhanya kakhulu, futhi ukuzenzekela kokusebenza kuphezulu.
Ipayipi le-HDPE liyipayipi lepulasitiki eliguquguqukayo elenziwe nge-thermoplastic high-density polyethylene esetshenziswa kabanzi ekudlulisweni koketshezi oluyingozi kanye negesi. Muva nje, amapayipi e-HDPE athole ukusetshenziswa kwawo okukhulu ekuthwaleni amanzi aphuzwayo, imfucuza eyingozi, amagesi ahlukahlukene, udaka, amanzi omlilo, amanzi esiphepho, njll. Isibopho esinamandla sama-molecule sezinto zamapayipi e-HDPE siyasiza ekusetshenzisweni kwamapayipi anomfutho ophezulu. Amapayipi e-polyethylene anomlando omude futhi ovelele wenkonzo yegesi, uwoyela, izimayini, amanzi, kanye neminye imboni. Ngenxa yesisindo sawo esiphansi kanye nokumelana nokugqwala okuphezulu, imboni yamapayipi e-HDPE ikhula kakhulu. Ngonyaka ka-1953, uKarl Ziegler no-Erhard Holzkamp bathola i-polyethene ephezulu (HDPE). Amapayipi e-HDPE angasebenza ngendlela eyanelisayo ebangeni lokushisa elibanzi elisuka ku--2200 F kuya ku-+1800 F. Kodwa-ke, ukusetshenziswa kwamapayipi e-HDPE akukhuthazwa lapho izinga lokushisa loketshezi lidlula u-1220 F (500 C).
Amapayipi e-HDPE enziwa ngokwenziwa kwe-polymerization ye-ethylene, umkhiqizo ophuma ku-oyela. Izithasiselo ezahlukahlukene (iziqinisi, izigcwalisi, amapulasitiki, izithambisi, izinto zokugcoba, izinto zokufaka imibala, izinto ezivimbela ilangabi, izinto zokuqhuma, izinto zokuxhumanisa, izithasiselo ezibolayo ze-ultraviolet, njll.) zengezwa ukukhiqiza ipayipi lokugcina le-HDPE kanye nezingxenye. Ubude bepayipi le-HDPE benziwa ngokushisa i-resin ye-HDPE. Bese ikhishwa ngedayi, enquma ububanzi bepayipi. Ubukhulu bodonga lwepayipi bunqunywa inhlanganisela yosayizi wedayi, isivinini sesikulufu, kanye nesivinini setrekta yokudonsa. Ngokuvamile, umnyama wekhabhoni ongu-3-5% ufakwa ku-HDPE ukuze uyenze imelane ne-UV, okuguqula amapayipi e-HDPE abe mnyama ngombala. Kunezinye izinhlobo zemibala ezitholakalayo kodwa ngokuvamile azisetshenziswa njalo. Ipayipi le-HDPE elinombala noma elinemigqa ngokuvamile liyizinto ezimnyama ezingu-90-95%, lapho kunikezwa khona umugqa onemibala ku-5% wobuso bangaphandle.