Qhov txawv ntawm aramid webbing (xws li, Kevlar®) thiab UHMWPE webbing (xws li, Dyneema®, Spectra®) tuaj yeem ua tiav los ntawm kev sib xyaw ua ke ntawm qhov yooj yim ntawm - qhov chaw sim thiab kev kuaj xyuas cov kws tshaj lij. Hauv qab no yog cov tswv yim, kauj ruam-los ntawm- cov lus qhia kauj ruam nrog cov ntaub ntawv ua tau zoo kom ntseeg tau tias muaj kev sib txawv:
Visual & Tactile Observation (Kev ntsuam xyuas ua ntej)
Qhov no yog txoj kev sib txawv ceev tshaj plaws, leveraging cov yam ntxwv ntawm cov khoom siv ntawm ob fibers:
|
Feature |
Aramid Webbing |
UHMWPE Webbing |
|---|---|---|
|
Xim |
Feem ntau golden daj los yog brownish (natural xim ntawm para-aramid). Kev cai- dyed ntau yam khaws cov xim daj daj ntawm cov tub ntxhais fiber ntau. |
Ib txwm dawb, lub teeb grey, los yog translucent. Dyeable rau ntau yam xim, tab sis cov khoom siv hauv paus tsis muaj xim daj thiab qhia tau hais tias lub suab tsis zoo. |
|
Texture & Handfeel |
Nyuaj thiab ruaj, nrog me ntsis glossy nto. Nws resists dabtsi yog khoov nyob rau hauv lub teeb siab thiab tsis yooj yim wrinkle; nws xav tias "rigid" thaum pinched. |
Mos, du, thiab matte. Nta ntawm qhov sib txawv slippery / waxy kov (zoo ib yam li paraffin) thiab yog pliable heev, folding yooj yim yam tsis tau khaws cov creases. |
|
Hla -section |
Tightly woven nrog ntom, uniform fiber ntau; qhov txiav ntug zoo nkaus li zoo thiab compact. |
Fibers yog finer thiab kuj xoob qauv; qhov txiav ntug qhia tau hais tias me ntsis fluffy kev ntxhib los mos vim qhov qis - ntom fiber ntau. |
Buoyancy Test (Yooj yim & Tsis yog-Kev puas tsuaj)
Ib qho tshwj xeeb uas tsis yog -kev puas tsuaj raws li qhov sib txawv ntawm qhov sib txawv ntawm qhov sib txawv- zoo tagnrho rau ntawm - qhov chaw tshawb xyuas ceev:
- Aramid webbing: ntom=1.44–1.45 g/cm³ (siab dua dej). Nws sai sai thaum muab tso rau hauv dej.
- UHMWPE webbing: ntom=0.97 g/cm³ (qis dua dej). Nws floats tsis tu ncua ntawm cov dej saum npoo av, txawm tias thaum tag nrho submerged thiab ces tso tawm.
combustion Test (Intuitive Confirmation, Safe Ib puag ncig yuav tsum tau)
Qhov kev ntseeg siab tshaj plaws ntawm - txoj hauv kev, raws li ob cov ntaub ntawv muaj cov cwj pwm sib txawv hauv kev sib txawv (thermoset vs. thermoplastic):
Aramid Webbing (Thermoset, Nplaim-Retardant)
1. Tsis ignite yooj yim; nws shrinks thiab chars thaum raug cov nplaim taws tab sis tsis yaj los yog poob.
2. Kub hnyiab nrog me me ntawm cov pa luam yeeb dub thiab emits ib tug txawv aromatic/cellulose-zoo li tsw (zoo li cov ntaub plaub kub kub).
3. Tawm nkig, ntxeem tau dub tshauv uas crumbles yooj yim thaum kov; cov tshauv khaws cov qub duab ntawm lub webbing fragment.
4. tuaj yeem tiv taus luv luv - lub sij hawm raug rau 420℃yam tsis muaj melting; decomposes ntawm ~ 560 degree.
UHMWPE Webbing (Thermoplastic, Flammable)
1. Melts ua ntej thaum rhuab (lub ntsiab lus melting: 130-136 degree) ua ntej igniting, ua kom pom tseeb molten drips (kev pheej hmoo ntawm scalding).
2. Kub hnyiab nrog ib tug xiav - taws daj daj thiab emits ib waxy/paraffin- zoo li tsw (raws li kub polyethylene yas).
3. Tshem tawm qhov seem tsawg kawg nkaus -xws li cov hmoov tshauv dawb me me lossis tsis muaj tshauv; cov molten residue solidifies rau hauv ib qho nyuaj, waxy hlaws.
4. Poob kev ntseeg siab tshaj 85 degree; melts tag nrho ntawm 150℃lossis siab dua.
Daim ntawv thov Scenario Clues
Cov ntsiab lus ntawm daim ntawv thov feem ntau cuam tshuam cov yam ntxwv ntawm cov khoom, pab kev sib txawv tsis ncaj:
- Aramid webbing: Dominates siab- kub / nplaim hluav taws- cov xwm txheej tiv taus- cov khoom siv hluav taws kub, cov hlua hluav taws xob rwb thaiv tsev, cov khoom siv dav hlau, thiab siab - qhov kub thiab txias ntawm cov khoom siv (qhov kub tiv taus txog 420℃yog qhov tseem ceeb).
- UHMWPE webbing: Siv nyob rau hauv lub teeb yuag, siab - daim ntaub ntawv toughness- ballistic vests/helmets, marine mooring ropes, nce toj harnesses, tactical load- bearings bets, and extreme-cov khoom txias (xws li, polar research gear).