Kev tshuaj xyuas cov khoom siv raw ntawm HDPE ob chav phab ntsa tshuab
Kev tshuaj xyuas cov khoom siv raw ntawm HDPE ob chav phab ntsa tshuab,
HDPE resin rau ob phab ntsa hauv qab, Yuav ua li cas xaiv HDPE resin rau ob phab ntsa hauv qab,
Cov kev cai dav dav rau cov khoom ntawm polyethylene (PE) muaj xws li melt flow rate (MFR), density, flexure elastic modulus thiab oxidation induction time (OIT), cuam tshuam lub zog, thiab lwm yam. Cov khoom kuaj kuj suav nrog tensile zog, elongation ntawm tawg, tshauv. , volatiles thiab lwm yam oxidation induction lub sij hawm txiav txim lub sij hawm ntawm oxidation puas.Rau lub tshuab nqus tsev uas xav tau 50 xyoo ntawm kev siv, kev tswj cov oxidation induction lub sij hawm ntawm raw cov ntaub ntawv yog tus yuam sij los xyuas kom meej lub neej kev pab cuam ntawm 50 xyoo.Nws tau hais meej meej nyob rau hauv GB / T19472.1-2004 tias lub sijhawm oxidation induction ntawm cov khoom siv raw ntawm bellows yuav tsum yog ≥20min (200 ℃).
Lub elastic modulus ntawm HDPE resin muaj kev cuam tshuam zoo rau lub nplhaib nruj.Cov ntaub ntawv uas muaj siab elastic modulus tuaj yeem txhim kho lub nplhaib nruj ntawm cov khoom, tab sis kuj txuag cov ntaub ntawv raw thiab txo cov nqi raws li qhov ua tau kom lub nplhaib nruj.Yog li hauv kev tsim cov HDPE ob chav phab ntsa, cov khoom siv raw yuav tsum muaj cov qauv siab ntawm elasticity.Qhov luaj li cas ntawm cov dej ntws tau qhia txog qhov loj ntawm molecular hnyav.Feem ntau hais lus, cov khoom siv nrog cov dej ntws ntau dua yog qhov tsim nyog rau kev ua thiab kev tsim, thiab tuaj yeem txhim kho kev tsim khoom.Txawm li cas los xij, nws tsis tuaj yeem loj dhau, uas muaj kev cuam tshuam ntau dua ntawm lub nplhaib nruj.Nyob rau tib lub sijhawm, nws yuav tsum muaj qhov ntom ntom ntom thiab kev ua haujlwm zoo thiab cov khoom siv tau hloov tau.
HDPE yeeb nkab qib muaj dav lossis bimodal faib ntawm molecular hnyav.Nws muaj zog creep kuj thiab zoo sib npaug ntawm rigidity thiab toughness.Nws yog ruaj heev thiab muaj tsawg sag thaum ua tiav.Cov kav dej uas tsim los ntawm cov khoom siv no muaj lub zog zoo, rigidity thiab kev cuam tshuam tsis zoo thiab cov cuab yeej zoo ntawm SCG thiab RCP.
Cov resin yuav tsum tau muab khaws cia rau hauv ib qho chaw qhuav, qhuav warehouse thiab deb ntawm hluav taws thiab tshav ntuj ncaj qha.Nws yuav tsum tsis txhob muab tso rau hauv qhov qhib cua.Thaum lub sij hawm kev thauj mus los, cov khoom yuav tsum tsis txhob raug tshav ntuj los yog nag thiab yuav tsum tsis txhob raug thauj nrog xuab zeb, av, seem hlau, thee lossis iav.Kev thauj mus los ua ke nrog cov tshuaj lom, corrosive thiab flammable yog nruj me ntsis txwv.
Daim ntawv thov
HDPE yeeb nkab qib tuaj yeem siv rau hauv kev tsim cov kav dej siab, xws li cov kav dej siab, cov kav dej roj thiab lwm cov kav dej.Nws kuj tseem siv tau los ua cov kav dej tsis muaj zog xws li ob-phab ntsa corrugated kav, hollow-wall winding kav, silicon-core kav, kav dej ua liaj ua teb thiab aluminiumplastics compound pipes.Tsis tas li ntawd, los ntawm reactive extrusion (silane cross-linking), nws tuaj yeem siv los ua cov kav dej sib txuas polyethylene (PEX) rau kev muab dej txias thiab dej kub.
