xov xwm

1.Aramid cov khoom siv fiber ntau

Lub npe tag nrho ntawm aramid fiber yog aromatic polyamide fiber.Nws yog linear polymer tsim los ntawm cov pab pawg muaj ntxhiab thiab amide pawg.Nws muaj cov khoom siv zoo heev, cov qauv tshuaj lom neeg ruaj khov, zoo tagnrho cov khoom siv, lub zog ultra-siab thiab siab modulus., kub tsis kam, acid thiab alkali tsis kam, lub teeb yuag, hnav tsis kam thiab lwm yam khoom zoo heev.Nws tau siv dav hauv kev lag luam xws li cov khoom siv tiv thaiv mos txwv, aerospace, kev tsim kho thiab cov khoom siv hluav taws xob.

Txawm li cas los xij, aramid fiber kuj muaj ob qhov tsis zoo

(1) Aramid fiber ntau tsis zoo UV tsis kam.Ultraviolet hluav taws xob (hnub ci) ua rau degradation ntawm aramid fibers.Yog li ntawd, yuav tsum muaj cov txheej txheem tiv thaiv, uas tuaj yeem yog lub tsho sab saum toj lossis txheej txheej ntawm cov khoom siv, piv txwv li, aramid threads feem ntau yog nyob rau hauv ib txheej tiv thaiv.

(2) Aramid fiber ntau muaj hygroscopicity siab (txog 6% ntawm nws qhov hnyav), yog li aramid fiber ntau cov ntaub ntawv yuav tsum tau tiv thaiv kom zoo, xws li topcoats feem ntau yog siv los txo hygroscopicity.Tsis tas li ntawd, kev siv qee hom aramid txo cov dej nqus ntawm cov khoom sib xyaw thaum nws raug dej, xws li Kevlar 149 lossis Armos.

2.PE khoom siv fiber ntau

PE tiag tiag yog hais txog UHMW-PE, uas yog ultra-siab molecular hnyav polyethylene.Nws yog ib qho kev ua tau zoo organic fiber ntau tsim nyob rau hauv thaum ntxov 1980s.Ua ke nrog carbon fiber thiab aramid, nws yog lub npe hu ua peb loj high-tech fibers nyob rau hauv lub ntiaj teb no niaj hnub no.Nws muaj kev ruaj ntseg ultra-siab thiab yog qhov nyuaj heev rau degrade, ua rau muaj kuab paug ib puag ncig loj.Tab sis nws yog precisely vim hais tias ntawm no tus yam ntxwv uas nws ua ib tug zoo tagnrho cov ntaub ntawv rau ua lub cev armor.Tsis tas li ntawd, nws tiv taus qhov kub thiab txias, UV teeb, thiab dej.

Nyob rau hauv cov nqe lus ntawm kev tiv thaiv cov mos txwv ceev ceev, cov mos txwv kev ua tau zoo ntawm PE fiber ntau yog li ntawm 30% siab dua li ntawm aramid;nyob rau hauv cov nqe lus ntawm kev tiv thaiv cov mos txwv kub ceev, kev ua tau zoo ntawm PE fiber ntau yog 1.5 mus rau 2 npaug ntawm aramid.Nws tuaj yeem hais tias qhov tsis txaus ntawm aramid fiber ntau tau dhau los ua qhov zoo ntawm PE fiber ntau, thiab qhov zoo ntawm aramid fiber ntau tau ua zoo dua ntawm PE fiber.Yog li ntawd, nws yog ib qho kev tsis pom zoo rau PE fiber ntau los hloov aramid hauv kev tiv thaiv.

Tau kawg, PE fiber kuj muaj qhov tsis zoo.Nws qhov ntsuas kub tsis kam yog qhov qis dua rau aramid fiber ntau.Kev siv kub ntawm PE fiber ntau tiv thaiv cov khoom yog nyob rau hauv 70 ° C (uas tuaj yeem ua tau raws li qhov xav tau ntawm tib neeg lub cev thiab cov khoom siv, uas yog, qhov kub thiab txias yuav tsum tau ua ntawm 55 ° C).Tshaj li qhov ntsuas kub no, kev ua haujlwm poob qis sai.Thaum qhov kub siab tshaj 150 ° C, PE fiber ntau yuav yaj, thiab aramid fiber ntau tseem tuaj yeem tuav cov khoom tiv thaiv zoo hauv ib puag ncig ntawm 200 ° C, thiab tsis yaj lossis decompose ntawm 500 ° C;Thaum ntsib qhov kub siab tshaj 900 ° C, nws yuav raug carbonized ncaj qha los tsim cov txheej txheem cua sov.Cov no tsis muaj nyob rau hauv PE fiber tiv thaiv cov khoom thiab tau dhau los ua qhov zoo ntawm cov khoom aramid.