Kawm txog ultra-high molecular hnyav polyethylene hauv ib feeb
"Ib tug choj txuas peb qhov chaw, thiab lub ntuj moat dhau los ua txoj kev taug kev" yog hais txog tus choj Hong Kong-Zhuhai-Macao. Raws li tus choj, lub qhov thiab cov kob dag, nws muaj qhov ntev tshaj plaws nyob rau hauv lub ntiaj teb, qhov ntev tshaj plaws steel qauv choj lub cev, thiab qhov ntev tshaj plaws underwater immersed tube qhov. Tus choj hla hiav txwv, tom qab nws, tau sau cov haujlwm nyuaj ntawm ntau txhiab tus neeg ua haujlwm R&D Suav.
tab sis koj paub dab tsi?
Txhawm rau ua kom tiav qhov kawg sib koom ua ke ntawm subsea qhov av ntawm Hong Kong-Zhuhai-Macau Choj, steel qauv pob zeb prefabricated qhov hnyav txog 6,000 tons tau hoisted, thiab cov cables siv tau tsim los ntawm 140,{ {5}} kev ua haujlwm siab polyethylene fibers.
Dab tsi yog Ultra High Molecular Nyhav Polyethylene?
Ultra-high molecular hnyav polyethylene (UHMWPE luv luv) yog polyethylene nrog lub luj molecular ntau tshaj 1 lab. Nws yog tiam thib peb ntawm kev ua tau zoo fibers tom qab carbon fiber / aramid fiber ntau thiab belongs rau thermoplastic engineering yas.
Raws li ib yam ntawm engineering yas nrog kev ua tau zoo heev, nyob rau hauv thaum ntxov theem ntawm txoj kev loj hlob, nws yog tsuas yog siv nyob rau hauv papermaking, textile thiab lwm yam kev lag luam sectors. Nyob rau hauv xyoo tas los no, nrog kev nce qib ntawm kev siv thev naus laus zis, cov txheej txheem ua tau zoo dua thiab zoo dua, thiab daim ntawv thov teb tau txuas ntxiv mus.
Qhov zoo ntawm UHMWPE
Txawm hais tias cov qauv molecular kev npaj ntawm ultra-high molecular hnyav polyethylene yog tib yam li ntawm cov polyethylene zoo tib yam, vim nws cov txheeb ze molecular loj heev, nws muaj ntau yam zoo heev uas tsis tshua muaj polyethylene tsis muaj.
(1) Kev hnav zoo heev. Kev hnav tsis kam ntawm ultra-siab molecular hnyav polyethylene yeeb nkab yog 4-7 zaug siab dua li cov kav hlau zoo tib yam, thiab 27.3 npaug ntawm cov hlau tsis muaj steel.
(2) Tsawg coefficient ntawm kev sib txhuam thiab tsis siv neeg lubrication. Nyob rau hauv ib puag ncig hnyav thiab qhov chaw uas muaj cov xuab zeb ntau, cov yeeb nkab ultra-high molecular hnyav polyethylene tuaj yeem txav mus los kom ntseeg tau tias cov khoom ua haujlwm cuam tshuam yuav tsis raug puas tsuaj los ntawm kev hnav thiab tsim kua muag.
(3) Non-toxic thiab tasteless. Ultra-high molecular yuag polyethylene yog ib qho khoom siv zoo nkauj uas muaj ntawv pov thawj los ntawm lub xeev. Nws yog ib yam tshiab ntawm ib puag ncig tus phooj ywg cov khoom uas tsis yog-tshuaj lom, tasteless, anti-fouling thiab tiv thaiv npauj.
(4) Qhov saum npoo yog non-adhesive thiab tsis scale. Vim nws tsis tshua muaj coefficient ntawm kev sib txhuam thiab tsis-polarity, UHMWPE muaj cov khoom tsis-adhesion.
(5) Tsawg kub tsis kam. Ultra-high molecular hnyav polyethylene kav tuaj yeem khaws cia ntawm -269 degree thiab 80 degree rau lub sijhawm ntev. Vim hais tias muaj ob peb unsaturated molecules nyob rau hauv lub molecular saw thiab siab stability, lub aging ceev yog tshwj xeeb tshaj yog qeeb.
(6) Tshuaj tiv thaiv kev ua haujlwm. Ultra-high molecular hnyav polyethylene muaj cov tshuaj tiv thaiv zoo heev, thiab ntau cov xov xwm corrosive thiab cov kuab tshuaj organic tsis muaj kev pab rau nws nyob rau hauv ib qho kub thiab txias ntau yam.
Yog li ntawd, ultra-high molecular hnyav polyethylene yog cov yas engineering nrog cov kev ua tau zoo tshaj plaws ntawm cov yas engineering, thiab ultra-siab molecular hnyav polyethylene tseem muaj kev cuam tshuam lub zog ntawm -40 degree , thiab tuaj yeem siv tau ntawm {{3. }} degree.
Moulding thiab ua ntawm Ultra High Molecular Nyhav Polyethylene
1. Kev siv tshuab dav dav
(1) Nias thiab sintering
Nias thiab sintering yog txoj kev ua haujlwm tseem ceeb tshaj plaws ntawm UHMWPE, tab sis qhov ua tau zoo ntawm kev nias thiab sintering yog qhov tsawg heev, thiab nws muaj oxidation thiab degradation.
(2) extrusion molding
Extrusion molding khoom feem ntau suav nrog ib leeg-ntsia hlau extruder thiab ntxaib-ntsia hlau extruder. Twin-screw extrusion feem ntau siv co-rotating ntsia hlau extruders.
(3) Txhaj tshuaj molding
(4) Tshuab molding
Thaum ultra-high molecular hnyav polyethylene yog ua tiav, thaum cov khoom yog extruded los ntawm cov tuag, nws yuav shrink rau ib tug npaum li cas ntawm elastic rov qab, thiab yuav luag tsis muaj sag yuav tshwm sim, yog li nws tsim tau tej yam kev mob rau tshuab moulding ntawm loj ntim.
2. Kev siv tshuab tshwj xeeb
(1) Jelly spinning
(2) Lubrication extrusion
