imikhiqizo

Ukuhlaziywa kwezakhiwo zezinto ezingavuthiwe ze-HDPE double wall bellows,
I-HDPE resin yezimbongolo ezinodonga oluphindwe kabili, indlela yokukhetha i-HDPE resin yezinsimbi ezimbili zodonga,

Izidingo ezijwayelekile zezakhiwo ze-polyethylene (PE) zifaka izinga lokuncibilika kokuncibilika (MFR), ukuminyana, i-flexure elastic modulus kanye nesikhathi sokungeniswa kwe-oxidation (OIT), amandla omthelela, njll. Izinto zokuhlola zihlanganisa amandla aqinile, ubude ngesikhathi sekhefu, umlotha. , ama-volatiles kanye nezinye isikhathi sokungeniswa kwe-oxidation sinquma isikhathi sokulimala kwe-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℃).

I-elastic modulus ye-HDPE resin inomthelela omkhulu ekuqineni kwendandatho.Izinto ezinemodulus enwebekayo ephezulu zingathuthukisa ukuqina kwendandatho yemikhiqizo, kodwa futhi zonge izinto ezingavuthiwe futhi zinciphise izindleko ngaphansi kwesisekelo sokuqinisekisa ukuqina kwendandatho.Ngakho-ke ekukhiqizeni izinsimbi ze-HDPE ezinodonga oluphindwe kabili, impahla eluhlaza esetshenzisiwe kufanele ibe ne-modulus ephezulu yokunwebeka.Usayizi wezinga lokuncibilika lokugeleza ubonisa usayizi wesisindo samangqamuzana.Ngokuvamile, impahla enezinga eliphezulu lokuncibilika kokugeleza kulungele ukucutshungulwa kanye nokwakheka, futhi ingathuthukisa ukusebenza kahle kokukhiqiza.Nokho, ayikwazi ukuba nkulu kakhulu, okunomthelela omkhulu ekuqineni kwendandatho.Ngesikhathi esifanayo, kufanele ibe nokuminyana okuphezulu nokusebenza kahle kokucubungula kanye nokuvumelana nezimo zemishini.

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.