High - qhov ceev polyethylene (HDPE) yog siv dav hauv cov tshuaj, kev tsim kho tau, thiab cov tshuaj zoo heev, thiab lub teeb ua haujlwm tsis kam, thiab lub teeb ua haujlwm tsis kam, thiab lub teeb ua haujlwm tsis kam, thiab lub teeb ua haujlwm tsis kam, thiab lub teeb ci. Txawm li cas los xij, cov xwm txheej sib txawv tam sim no sib txawv ntawm cov ntaub ntawv kev ua tau zoo rau kev ua kom tau zoo rau kev ua kom zoo thiab thiav. Cov kab lus no ntsuas cov tswv yim xaiv ntawm peb: Cov khoom siv yooj yim, cov khoom tseem ceeb tsis muaj tseeb, thiab cov ntaub ntawv raug cai raug.
Cov Khoom Yooj Yim thiab Cov Qauv Ntawm Cov Qauv Ntawm Cov Khoom HDPE
HDPE yog lub crystalline resin nrog densely ntim molecular packing molecular charets thiab lub ntom ntom ntom los ntawm 0.941 rau 0.965 g / cm³. Raws li cov sib txawv hauv cov txheej txheem ntau lawm, cov khoom HDPE HDPE ntau ntawm kev ua lag luam tuaj yeem ua rau hauv extruded thiab compression {{}} moulded hom. Tus qub muaj cov kev niaj hnub ua kom zoo dua qub (thev taus ± 0.5 hli) thiab haum rau cov khoom siv precision precision. Cov tom kawg muaj ntau dua kev cuam tshuam lub zog (tsis tshua muaj kev cuam tshuam lub zog loj dua los yog sib npaug rau 20 kj / m²) thiab yog qhov tsim nyog rau cov ntawv thov kev thauj khoom.
Hais txog kev ua yeeb yam yooj yim, siab - Cov ntawv HDPE zoo yuav tsum ua kom tau raws li cov hauv qab no cov ntsuas:
1. Tshuaj lom neeg tiv thaiv: inert kom muaj zog acids xws li sulfuric acid thiab nitric acid ntawm ntau dua 80%, nrog rau cov organic cov kuab tshuaj.
2. Kev ntxhov siab ib puag ncig tawg pleb
3. Cua sov deflect kub: Tsis pub tsawg tshaj 50℃hauv qab load ntawm 1.8 MPA, kom muaj kev ruaj khov nyob rau hauv kev ua haujlwm ib txwm muaj.
Kev xaiv hauv paus rau cov kev ua tau tseem ceeb
(1) cov cuab yeej kho tshuab txuam hauv paus ntsiab lus
Rau cov ntawv thov raug kaw hnyav lossis ntau zaus (xws li cov khoom siv me me), cov khoom coj tsis kam yog qhov tseem ceeb. Los ntawm kev ntxiv 2% {- 5% ultra- Siab} Cov Khoom Siv Kom Loj (UHMWPE (UH -0.12 cmÃ) Rau cov ntawv thov txhawb nqa (xws li cov kws zov me nyuam nyob ib ntus), cov qib siab muaj zog nrog lub zog tensile ntau dua los yog sib npaug nrog 800 MPA yuav tsum raug xaiv.
(2) ib puag ncig kev hloov kho cov kev daws teeb meem
Nyob rau hauv ntev -}} sij hawm siv sab nraum zoov siv, UV Laus yog thawj hom tsis ua tiav. HDPE nplooj ntawv tau hloov kho nrog 2% -3% cov ntsiab lus dub tuaj yeem txhim kho huab cua tiv thaiv los ntawm 3-5 zaug (QV nrawm<3 after 500 hours). For applications involving contact with food or pharmaceutical media, sanitary-grade resins that comply with FDA 21 CFR 177.1520 must be selected to ensure heavy metal migration is less than 0.1 ppm.
(3) ua kev sib raug zoo
Thaum koom nrog cov ntawv txheeb tshuab siv thermal vuam, nws raug nquahu kom xaiv qib nruab nrab nrog tus nqi npau npau (MFR) ntawm 0.1 {} 0.3 g / 10 min. Qhov no ua kom muaj zog ob lub zog (shear lub zog ntau dua los yog sib luag rau 85% ntawm niam txiv cov khoom) thaum zam kev weld deformation tshwm sim los ntawm kev ua kom muaj floformation ntau dhau. Rau cnc txiav, ib qib dawb-txiav nrog MFR> 0.5 G / 10 min raug pom zoo kom txo qis cov cuab yeej hnav.
Cov Khoom Siv Cov Khoom Siv Rau Cov Ntawv Teev Npe Raug Raug
(1) Tshuaj tiv thaiv kev tiv thaiv kev tiv thaiv corrosion
Rau cov ntawv thov tank ntawm kev tawm tswv yim rau cov xov xwm hydrochloric acid thiab sodium hydroxide, ib 15% iav fiber cuam tshuam nrog cov khoom siv HDPE ntxiv. Nws cov tub ntxhais hluas tus modulus tuaj yeem ncav cuag 1200 mpa thaum tswj cov tshuaj zoo heev (tsis muaj kev mob siab tom qab siv 50% NAOH daws rau ib xyoos).
(2) kev tiv thaiv tshuab
Rau lub tshuab cov lus qhia kev tiv thaiv, ib qho precision - cov ntawv nyeem nrog 0.8 μm thiab kev sib luag ntawm ntug dej D 60-70 yog nyiam. Qhov no zoo thaiv cov hlau nti hlau cuam tshuam thiab tiv thaiv kev hnav ntau dhau ntawm kev coj cov nqaj hlau.
(3) Cov chaw tiv thaiv ib puag ncig
Rau cov dej phwj kev kho tsob ntoo npog tshuab, lub teeb ceev ceev ntawm 0.7 G / cm³ muaj peev xwm txo lub peev xwm txaus (sib luag rau 1.5 T / M²).
Kev xaiv cov khoom siv rau HDPE ntawv yog qhov tseem ceeb txheej txheem ntawm cov khoom siv uas muaj txiaj ntsig zoo nrog kev siv tau. Hauv kev xyaum ua lag luam, ntau yam, xws li kev xav txog kev ua haujlwm, thiab kev ntseeg tau ntawm txoj kev xaiv tau raug xaiv los ntawm kev sim ua qauv. Nrog kev taug kev hauv kev sib xyaw ua ke thiab hloov kho cov kev hloov kho, customized daim ntawv kev daws teeb meem yog tsav nws cov ntawv thov hauv cov ntawv thov ntau dua. This requires materials engineers to continuously deepen their understanding of the mechanisms linking the material's microstructure and macroscopic properties.
