Ultra-high molecular hnyav polyethylene (UHMW-PE) cwj pwm
Ultra-siab molecular hnyav polyethylene (UHMW-PE) yog ib hom tshiab engineering yas nrog zoo heev hnav tsis kam, cuam tshuam tsis kam, nws tus kheej lubricating, corrosion kuj, thiab kub tsis kam ntawm cov yas uas twb muaj lawm. Nws yog hu ua" zoo kawg nkaus yas". Vim lub siab viscosity, zoo tib yam ntsia hlau-type processing txoj kev yuav siv tsis tau. Tau ntev, nws tau txwv rau txoj kev nias thiab sintering los tsim cov khoom yooj yim xws li daim hlau, thiab cov khoom siv tau zoo kuj tsawg. Impact-resistant thiab corrosion-resistant qhov chaw yuav tsum vam khom rau cov txheej txheem extrusion molding. Lub extrusion molding ntawm UHMW-PE yog tseem nyob rau hauv txoj kev loj hlob theem nyob rau hauv Tuam Tshoj. Ntau qhov kev lag luam cia siab tias yuav tsim cov khoom UHMW-PE thiab cov khoom uas lawv xav tau.
I. OverviewUltra-high molecular hnyav polyethylene (UHMW-PE) feem ntau yog hais txog cov qauv linear polyethylene nrog viscosity nruab nrab molecular hnyav ntawm ntau tshaj 1.5 lab (zoo tib yam polyethylene muaj qhov hnyav molecular ntawm tsuas yog 20,000 txog 300,000). Vim nws qhov hnyav molecular, nws muaj kev cuam tshuam tsis zoo, cuam tshuam, thiab Corrosion, tsis tshua muaj kub tsis kam, nws tus kheej lubricating, cuam tshuam lub zog nqus, huv thiab tsis muaj tshuaj lom, thiab lwm yam, nws yog hu ua" amazing yas" hauv Tebchaws Europe thiab Amelikas. Nws tau maj mam siv rau ntau qhov chaw xws li textile, papermaking, ntim, tsheb thauj mus los, machinery, tshuaj lom neeg kev lag luam, mining, roj av, kev ua liaj ua teb, kev tsim kho, hluav taws xob, khoom noj khoom haus, kev kho mob, kis las thiab tub yees technology. kev ua tau zoo thiab kev ua tiav UHMW-PE muaj qhov zoo hauv qab no: (1) Hnav tsis kam, 4 npaug siab dua nylon 66 (PA-66) thiab polytetrafluoroethylene (PTFE), 7-10 npaug siab dua carbon steel thiab stainless hlau. (2) Qhov cuam tshuam lub zog ntawm cov yas yog 5 npaug ntawm ABS, thiab nws tuaj yeem tswj tau ntawm qhov kub ntawm cov kua nitrogen (-196 ° C), uas yog qhov tshwj xeeb uas lwm yam yas tsis muaj. (3) Cov tshuaj tiv thaiv zoo heev. Ntxiv rau qhov muaj zog oxidizing acid, nws tuaj yeem tiv taus ntau yam corrosive media (acid, alkali, ntsev) thiab cov organic media (tshwj tsis yog cov kuab tshuaj naphthalene) hauv qhov kub thiab txias ntau yam. Nws tuaj yeem muab tso rau hauv 80 cov kuab tshuaj organic ntawm 20 ° C thiab 80 ° C. Tom qab 30 hnub ntawm kev lag luam, tsis muaj qhov txawv txav, thiab yuav luag tsis muaj kev hloov pauv ntawm lwm yam khoom ntawm lub cev. (4) Qhov cuam tshuam lub zog nqus yog siab, thiab txo suab nrov yog qhov zoo. (5) Nws yog huv huv thiab tsis muaj tshuaj lom, raws li cov qauv ntawm Japanese Health Association, thiab tau pom zoo los ntawm US Food and Drug Administration (FDA) thiab US Department of Agriculture (USDA). Nws tuaj yeem siv los tiv tauj cov zaub mov thiab tshuaj thiab tuaj yeem cog rau hauv tib neeg lub cev. (6) Tsis tshua muaj kev sib txhuam coefficient thiab nplua nuj tus kheej-lubricity. Nyob rau hauv dej lubrication tej yam kev mob, nws dynamic kev sib txhuam coefficient yog ib nrab qis dua PA-66 thiab polyoxymethylene (POM). Nyob rau hauv lub teb ntawm tribology, nws yog soj ntsuam raws li ib tug kev sib txhuam cov ntaub ntawv nrog" zoo tagnrho nqi / kev ua tau zoo". (7) Tsis muaj adhesion, lub peev xwm tiv thaiv adhesion yog sib npaug rau Teflon. (8) Qhov kub thiab txias tsis kam, thiab tseem muaj qee qhov kev sib tw ntawm cov kua helium kub (-269 ℃). (9) Kev tiv thaiv dej zoo heev, kev nqus dej tsuas yog 1% ntawm nylon. (10) Qhov ceev ntawm engineering plastics yog nruab nrab thiab me me, tsuas yog 1/8 ntawm cov hlau. (11) Tus nqi qis ntawm engineering plastics. Txij li thaum ua lag luam ntawm UHMW-PE resin nyob rau hauv lub lig 1950s, nws noj tau tuav ib tug nruam kev loj hlob momentum. Lub ntiaj teb qhov nruab nrab kev loj hlob txhua xyoo yog 8.5% ua ntej xyoo 1980 thiab 16% tom qab xyoo 1980. Tag nrho cov peev txheej ntawm UHMW-PE hauv ntiaj teb yog 80kt / xyoo, thiab lub peev xwm ntawm UHMW-PE hauv kuv lub tebchaws yog 10kt / xyoo. Txawm li cas los xij, vim yog lub siab yaj viscosity (yuav luag tsis muaj fluidity) ntawm UHMW-PE, qhov sib cuam tshuam nias thiab sintering txoj kev tau siv los tsim cov phaj thiab qee qhov yooj yim rau lub sijhawm ntev, thiab kev ua haujlwm ntau lawm kuj tsawg, uas txwv. Daim ntawv thov ntawm UHMW-PE. Ntawm ntau tshaj 200 hom UHMW-PE cov khoom uas tau siv nyob rau hauv tsev thiab txawv teb chaws, feem ntau ntawm lawv yog cov khoom uas tsis tu ncua tsis tu ncua hla ntu. Tsuas yog los ntawm kev siv cov txheej txheem extrusion molding zoo tuaj yeem ua kom muaj kev lag luam loj loj tuaj yeem pom tau.In 1999, UHMW-PE ua tshuab tau suav nrog hauv" Cov Lus Qhia rau Kev Txhim Kho Tseem Ceeb ntawm High-Tech Industrialization Key Fields" sib koom ua ke los ntawm Ministry of Science thiab Technology thiab Development Planning Commission, uas muab kev txhawb nqa thiab kev siv ntawm UHMW-PE extrusion molding tshuab thiab nws cov khoom muaj lub sijhawm zoo. Lub tuam txhab nthuav qhia cov cuab yeej tshwj xeeb ultra-siab molecular hnyav extrusion khoom, tshwj xeeb hauv kev tsim cov khoom siv ultra-high molecular hnyav polyethylene hnav-tiv taus qhov chaw. Kev ua haujlwm tshwj xeeb: Ultra-siab molecular hnyav polyethylene raw cov ntaub ntawv (molecular hnyav raws li cov neeg siv khoom xav tau) ~~ Ntxiv cov khoom tshwj xeeb extrusion rau cua sov ~ Nkag mus rau cov pwm customized kom tiav ~~ Extrusion qhov khoob ~~ Cov khoom tiav tiav yog ua tiav los ntawm chaw ua haujlwm raws li daim duab kos.