I-HDPE ephindwe kabili yodonga lwamapayipi kathayela impahla eluhlaza
I-HDPE ephindwe kabili yodonga lwamapayipi kathayela impahla eluhlaza,
I-HDPE yokukhiqizwa kwamapayipi kathayela odongeni oluphindwe kabili, Iluphi uhlobo lwe-HDPE resin esetshenziselwa ipayipi likathayela odongeni oluphindwe kabili,
I-HDPE ephindwe kabili yodonga lwamapayipi kathayela impahla eluhlaza
1. Ukwakheka kwezinto zokusetshenziswa: Izinto zokusetshenziswa ze-PE double-wall bellows ngokuvamile zakhiwe nge-polyethylene, izinto eziyinhloko ezithuthukisiwe nezimibalabala.Uma impahla eluhlaza imanzi, ukuze kuthuthukiswe ukusebenza kahle kokukhiqiza, i-defoamer efanelekile ingangezwa.
2, izidingo zokusebenza zezinto zokusetshenziswa: indlela yokukhiqiza izindleko eziphansi, izinga eliphezulu lokuvuthela, kuncike kakhulu ekukhethweni kwezinto zokusetshenziswa kanye nokuqoqwa kwefomula.
Izidingo ezijwayelekile zokusebenza kwe-polyethylene (PE) zifaka izinga lokuncibilika kokuncibilika (MFR), isikhathi sokungeniswa kwe-oxidation (OIT) kanye nokuminyana.Usayizi wezinga lokuncibilika lokugeleza ubonisa usayizi wesisindo samangqamuzana.Ngokuvamile, izinto ezinezinga eliphezulu lokuncibilika kokugeleza kulungele ukucutshungulwa kanye nokwakheka, futhi zingathuthukisa
ukusebenza kahle kokukhiqiza.Nokho, ayikwazi ukuba nkulu kakhulu, okunomthelela omkhulu ekuqineni kwendandatho.Kuyafaneleka ukukhetha phakathi kuka-0.8-1.5g/10min(190℃, 5kg).Isikhathi sokungeniswa kwe-oxidation sinquma isikhathi somonakalo we-oxidation.Ngokuvuthela okudinga iminyaka engu-50 yokusetshenziswa, ukulawula isikhathi sokungeniswa kwe-oxidation sezinto zokusetshenziswa kuyisihluthulelo sokuqinisekisa impilo yesevisi yeminyaka engama-50.Kubekwe ngokucacile ku-GB/T19472.1-2004 ukuthi isikhathi sokungeniswa kwe-oxidation sempahla eluhlaza ye-bellows kufanele sibe ≥20min (200℃).Nge-polyethylene ephakathi nendawo ephezulu, izakhiwo zayo zingashintshwa ngokushintsha ukuminyana.Ngoba siyazi ukuthi i-polyethylene ene-density ephansi ingandisa isikhathi sayo sokuhluleka esiqinile.
Ibanga lepayipi le-HDPE linokusabalalisa okubanzi noma okubili kwesisindo samangqamuzana.Inokumelana okuqinile kwe-creep kanye nebhalansi enhle yokuqina nokuqina.Ihlala isikhathi eside futhi ine-sag ephansi uma icutshungulwa.Amapayipi akhiqizwa kusetshenziswa le resin anamandla amahle, ukuqina kanye nokumelana nomthelela kanye nempahla enhle kakhulu ye-SCG ne-RCP..
I-resin kufanele igcinwe endaweni yokugcina impahla, eyomile futhi kude nomlilo kanye nelanga eliqondile.Akufanele inqwabelane endaweni evulekile.Ngesikhathi sokuthutha, izinto ezisetshenziswayo akufanele zichayeke elangeni elinamandla noma imvula futhi akufanele zihanjiswe kanye nesihlabathi, inhlabathi, izinsimbi ezilahliwe, amalahle noma ingilazi.Ukuhamba nezinto ezinobuthi, ezonakalisayo nezivuthayo akuvunyelwe ngokuphelele.
Isicelo
Ibanga lepayipi le-HDPE lingasetshenziswa ekukhiqizeni amapayipi okucindezela, njengamapayipi amanzi anomfutho, amapayipi egesi kaphethiloli kanye namanye amapayipi ezimboni.Ingase futhi isetshenziselwe ukwenza amapayipi angacindezeli njengamapayipi kathayela anodonga oluphindwe kabili, amapayipi anodonga oluyizigodi, amapayipi e-silicon-core, amapayipi okunisela ezolimo namapayipi ayinhlanganisela ye-aluminiumplastics.Ukwengeza, ngokusebenzisa i-extrusion esebenzayo (i-silane cross-linking), ingasetshenziselwa ukukhiqiza amapayipi e-polyethylene axhunyiwe (PEX) ukuze ahlinzeke ngamanzi abandayo nashisayo.
