Ultra siab molecular hnyav polyethylene cable (UHMWPE, hereinafter hu ua PE), los yog hu ua "Dyneema", tsuas yog ib tug khoom npe trademark lub tuam txhab DSM. Txawm li cas los xij, nws lub koob npe nrov yog siab heev, yog li cov khoom siv no suav nrog hu ua "Dyneema" los ntawm ntau tus neeg. Feem ntau ntawm cov ntaub ntawv PE siv hauv cov khoom siv hauv tsev tsis yog DSM cov khoom. Cov khoom siv no muaj kev paub tab ntau lawm hauv Suav teb, thiab qhov zoo ntawm ultra-siab molecular hnyav polyethylene cables hauv peb lub teb chaws yog twb zoo heev. Txawm Petzl feem ntau xaiv cov khoom siv PE pheej yig dua es tsis txhob siv cov khoom dyneema. Nws cov xim yog feem ntau dawb huv, nrog ib tug me me ntawm siab modulus polyethylene khoom nyob rau hauv daj / dub.
Aramid hlua, peb feem ntau hnov txog Kevlar hlua vim nws cov khoom lag luam yog "Kevlar Kevlar", uas yog cov khoom ntawm DuPont. Kuj tseem muaj cov khoom zoo sib xws hu ua "liquid crystal polymer" (LCP), uas muaj cov khoom zoo sib xws rau aramid. Lawv cov xim feem ntau yog daj.
Ultra siab molecular hnyav polyethylene cables muaj lub zog siab thiab cov tshuaj tiv thaiv zoo, thiab feem ntau siv rau hauv marine thiab mooring daim ntaub ntawv; Aramid ropes tiv taus qhov kub thiab txias thiab feem ntau siv hauv kev tua hluav taws.
Ob qho khoom siv saum toj no kuj tau siv dav hauv kev tsim cov khoom siv mos mos vim lawv lub zog siab. Tau kawg, kuj tseem muaj ntau qhov sib txawv ntawm lawv cov khoom siv, xws li cov ntsiab lus qis ntawm high modulus polyethylene, uas tsuas yog nyob ib ncig ntawm 145 degrees Celsius, tab sis nws qhov tshwj xeeb lub ntiajteb txawj nqus yog sib dua li dej, yog li nws tuaj yeem ntab saum npoo dej. Thiab aramid tuaj yeem tiv taus qhov kub thiab txias, nrog rau qhov kub thiab txias ntawm 450 degrees Celsius.
Qhov sib txawv ntawm kev ua haujlwmntawm ultra-high molecular hnyav polyethylene ropes thiab aramid ropes:
Ceev: Ultra siab: 0.97 (tuaj yeem ntab hauv dej); Qhov Loj: 1.4
Scalability: Ultra siab: Tsawg heev; Aramid: Tsawg heev.
Kev sib txhuam coefficient: ultra-siab: tsawg heev; Aramid: Tsawg.
Tus nqi nqus dej: ultra-siab: tsawg heev; Aramid: Feem ntau.
UV tsis kam: ultra-siab: zoo heev; Aramid: Tsis zoo.
Kev siv zog: Ultra siab: siab heev; Aramid: siab heev.
Melting point (degree): Ultra siab: 145; Qhov siab: 450.
Nyob rau hauv lub tshav pob ntawm cov khoom tiv thaiv tus kheej, ropes ua los ntawm ultra-siab molecular hnyav polyethylene thiab aramid cov ntaub ntawv yog feem ntau technical auxiliary ropes nrog diameters xws li5mm txog 8.5mm. Cov hlua pabcuam no muaj lub zog siab tab sis tsis tshua muaj ductility, lossis tuaj yeem sib xyaw ntxiv rau qee yam ntxwv.
Rau ultra-high molecular hnyav polyethylene, vim li cas vim li cas cov khoom no tsis haum raws li txoj hlua ua haujlwm rau pem hauv ntej yog vimnws qhov qis melting point thiab tsis tshua muaj kev sib txhuam coefficient.
Rau cov ntaub ntawv aramid, muaj qhov tseeb me me ntawm cov hlua ua haujlwm siab ua tiav ntawm aramid ntawm kev ua lag luam (vim yoglawv kub tsis kam, ntau yog siv nyob rau hauv hluav taws thiab tub ceev xwm ib puag ncig), thiab lawv ductility kuj tsawg heev. Txawm li cas los xij, cov ntaub ntawv aramid yogrhiab heev rau ultraviolet hluav taws xob, thiab tej zaum tom qab ob los yog peb lub hlis ntawm kev siv, hluav taws xob ultraviolet tuaj yeem ua rau txoj hlua ntawm daim tawv nqaij ua hmoov. Tsis tas li ntawd, qee cov aramid fibers yog rhiab heev rau kev khoov ntau zaus thiab ntev deliquescence, uas tuaj yeem ua rau txo qis hauv lawv lub zog.
Nyob rau hauv cov nqe lus ntawm ductility, ultra-high molecular hnyav polyethylene cables thiab aramid cables muaj tsis tshua muaj ductility, uas ua rau ib tug tseem ceeb teeb meem ntawm tsis tshua muaj peev xwm nqus cov quab yuam. Qhov kev pheej hmoo tseem ceeb tshwm sim thaum lub sijhawm tshawb nrhiav lub qhov tsua yog qhov cuam tshuam loj heev uas tsim los ntawm kev ua haujlwm luv luv lossis tsis ua haujlwm ntawm cov ntsiab lus nruab nrab ntawm cov thauj tog rau nkoj. Yog li cov hlua txoj kab uas hla tsawg tsis haum rau feem coob ntawm cov neeg thiab ib puag ncig, thiab yog tias siv dav, lawv tuaj yeem ua rau muaj xwm txheej.
Ntxiv mus, tus nqi ntawm ultra-siab molecular hnyav polyethylene thiab aramid cov ntaub ntawv yog ntau dua li nylon thiab polyester, yog li lawv cov nqi-zoo li cov hlua ua haujlwm siab heev kuj tseem tsawg heev.
Kev yuav khoom ultra-high molecular hnyav polyethylene ropes thiab aramid ropes, thov koj xav tiv tauj peb.