Key Difference – UHMW vs HDPE
UHMW thiab HDPE yog cov thermoplastic polymers uas muaj qhov zoo sib xws. Qhov sib txawv tseem ceeb ntawm UHMW thiab HDPE yog tias UHMW muaj cov hlua polymer ntev nrog cov hnyav molecular hnyav heev thaum HDPE muaj qhov sib piv siab-rau-qhov sib piv.
UHMW stands rau Ultra High Molecular Nyhav polyethylene. Nws kuj tau hais los ntawm UHMWPE. Lub sij hawm HDPE sawv cev rau High Density Polyethylene.
UHMW yog dab tsi?
UHMW yog ultra-siab molecular hnyav polyethylene. Nws yog ib hom thermoplastic polymer. Cov khoom siv polymer no muaj cov hlua hlau ntev heev uas muaj qhov hnyav molecular (kwv yees li 5-9 lab amu). Yog li ntawd, UHMW muaj qhov siab tshaj plaws molecular ceev. Txawm li cas los xij, qhov pom ntawm qhov sib xyaw no yog qhov txawv ntawm HDPE.
Properties of UHMW
Cov khoom tseem ceeb ntawm UHMW muaj raws li hauv qab no.
- Nws yog cov khoom tawv.
- muaj kev cuam tshuam lub zog
- High zawv zawg muaj peev xwm
- Crack resistance
- Nws tsis yog nplaum heev
- Cov tshuaj tsis muaj tshuaj lom, thiab muaj kev nyab xeeb.
- YNws tsis nqus dej.
Txhua cov saw hlau polymer hauv UHMW ntev heev, thiab lawv ua raws tib txoj kev. Txhua lub saw hlau yog sib txuas nrog lwm cov saw hlau nyob ib puag ncig ntawm Van der Waal rog. Qhov no ua rau tag nrho cov qauv tawv heev.
UHMW yog tsim los ntawm polymerization ntawm monomer, ethylene. Lub polymerization ntawm ethylene tsim cov khoom siv polyethylene. Cov qauv ntawm UHMW yog qhov txawv ntawm HDPE vim yog txoj kev tsim khoom. UHMW yog tsim nyob rau hauv lub xub ntiag ntawm metallocene catalyst (HDPE yog tsim nyob rau hauv lub xub ntiag ntawm Ziegler-Natta catalyst).
Daim duab 1: Lub Hlwb Stainless Hlau Hloov los ntawm UHMW
Applications of UHMW
- Kev tsim lub hnub qub log
- Screws
- Rollers
- Gears
- Sliding daim hlau
YHDPE yog dab tsi?
HDPE yog qhov ntom ntom polyethylene. Nws yog cov khoom siv thermoplastic polymer. Cov khoom no muaj qhov ntom ntom ntom thaum piv rau lwm hom polyethylene. Qhov ceev ntawm HDPE yog muab raws li 0.95 g / cm3 Vim tias qib ntawm cov saw hlau polymer hauv cov khoom no tsawg heev, cov saw hlau polymer tau ntim nruj heev. Qhov no ua rau HDPE kuj nyuaj thiab muab kev tiv thaiv siab. HDPE tuaj yeem ua haujlwm nyob rau hauv qhov kub ntawm 120 ° C yam tsis muaj kev phom sij. Qhov no ua rau HDPE autoclavable.
Daim duab 02: Lub cim Resin Code rau HDPE
YProperties of HDPE
Cov khoom tseem ceeb ntawm HDPE suav nrog,
- Nyob nyuaj
- High impact resistant
- Autoclavable
- Opaque lossis translucent tsos
- siab zog-rau-qhov sib piv
- Lub yuag
- Tsis muaj lossis tsawg dua cov kua dej
- Tshuaj tiv thaiv
HDPE yog ib qho ntawm cov ntaub ntawv yas uas yooj yim rau rov siv dua. Cov khoom no txiav txim siab cov ntawv thov ntawm HDPE.
Daim ntawv thov ntawm HDPE
Qee daim ntawv thov tseem ceeb suav nrog hauv qab no.
- Siv ua ntim rau ntau cov kua sib xyaw xws li mis nyuj thiab khaws cov tshuaj xws li cawv.
- Tau tsim cov hnab yas khw
- Trays
- pib fittings
- HDPE kuj tseem siv rau cov laug cam
Dab tsi yog qhov zoo sib xws ntawm UHMW thiab HDPE?
- UHMW thiab HDPE yog ua los ntawm ethylene monomers.
- Ob leeg yog cov thermoplastic polymers.
- Ob leeg muaj qhov sib txawv tsis txawv.
Qhov txawv ntawm UHMW thiab HDPE yog dab tsi?
UHMW vs HDPE |
|
| UHMW yog ultra-siab molecular hnyav polyethylene. | HDPE yog qhov ntom ntom polyethylene. |
| qauv | |
| UHMW muaj cov hlua polymer ntev heev. | HDPE muaj luv luv polymer chains piv rau UHMW. |
| Molecular Nyhav ntawm Polymer Chains | |
| Cov saw hlau polymer ntawm UHMW muaj qhov hnyav heev molecular. | Cov saw hlau polymer ntawm HDPE muaj qhov hnyav molecular piv rau UHMW. |
| Production | |
| UHMW yog tsim nyob rau hauv lub xub ntiag ntawm metallocene catalyst. | HDPE yog tsim nyob rau hauv lub xub ntiag ntawm Ziegler-Natta catalyst. |
| UHMW tsis nqus dej (zero absorption). | HDPE tuaj yeem nqus dej me ntsis. |
Summary – UHMW vs HDPE
Ob leeg UHMW thiab HDPE yog ua los ntawm ethylene monomers ntawm polymerization. Qhov sib txawv tseem ceeb ntawm UHMW thiab HDPE yog tias UHMW muaj cov hlua polymer ntev nrog cov hnyav molecular hnyav heev thaum HDPE muaj qhov sib piv siab-rau-qhov sib piv.
