1.Tanthauzo la ulusi wa aramid
Aramid fiber ndi dzina lophatikizana la ulusi wonunkhira wa polyamide.
2.Kupanga ma aramid fibers
Aramid CHIKWANGWANI molingana ndi kapangidwe ka maselo akhoza kugawidwa mu mitundu itatu: para-onunkhira polyamide CHIKWANGWANI, inter-onunkhira polyamide CHIKWANGWANI, onunkhira polyamide copolymer CHIKWANGWANI. Pakati pawo, para-aromatics polyamide ulusi amagawidwa mu polyphenylamide (poly-p-aminobenzoyl) ulusi, poly-benzenedicarboxamide terephthalamide ulusi, inter-position benzodicarbonyl terephthalamide ulusi amagawidwa mu poly-m-tolyl terephthalamide ulusi, poly-N, Nm-tolyl-bis-(isobenzamide) terephthalamide fibers.
3.Makhalidwe a aramid fibers
1. Zabwino zamakina
Interposition aramid ndi polima wosinthika, kusweka mphamvu kuposa poliyesitala wamba, thonje, nayiloni, etc., elongation ndi yokulirapo, yofewa kukhudza, yabwino spinnability, akhoza kupangidwa mosiyanasiyana slenderness, kutalika kwa ulusi lalifupi ndi ulusi, ambiri nsalu. makina opangidwa ndi ulusi wosiyanasiyana amawerengera nsalu, nsalu zopanda nsalu, akamaliza, kuti akwaniritse zofunikira za madera osiyanasiyana a zovala zotetezera.
2. Wabwino lawi ndi kutentha kukana
The limiting oxygen index (LOI) ya m-aramid ndi 28, kotero simapitiriza kuyaka ikachoka pamoto. Makhalidwe oletsa malawi a m-aramid amatsimikiziridwa ndi kapangidwe kake kake, ndikupangitsa kuti ikhale chingwe choletsa moto chomwe sichimatsitsa kapena kutaya mphamvu yake yoletsa kuyatsa ndi nthawi kapena kuchapa. M-aramid ndi yokhazikika pa kutentha ndipo ingagwiritsidwe ntchito mosalekeza pa 205 ° C ndipo imakhala ndi mphamvu zambiri pa kutentha kuposa 205 ° C. M-aramid imakhala ndi kutentha kwakukulu kowola ndipo simasungunuka kapena kudontha pa kutentha kwakukulu, koma imayamba kutenthedwa ndi kutentha kuposa 370 ° C.
3. Khola mankhwala katundu
Kuphatikiza pa ma asidi amphamvu ndi maziko, aramid samakhudzidwa kwenikweni ndi zosungunulira za organic ndi mafuta. Mphamvu yonyowa ya aramid imakhala yofanana ndi mphamvu youma. Kukhazikika kwa nthunzi wamadzi wodzaza ndikwabwino kuposa ulusi wina wachilengedwe.
Aramid imakhudzidwa kwambiri ndi kuwala kwa UV. Ngati padzuwa kwa nthawi yayitali, imataya mphamvu zambiri ndipo iyenera kutetezedwa ndi wosanjikiza woteteza. Chotetezera ichi chiyenera kulepheretsa kuwonongeka kwa mafupa a aramid kuchokera ku kuwala kwa UV.
4. Kukana kwa radiation
Kukana kwa radiation kwa interposition aramids ndikwabwino kwambiri. Mwachitsanzo, pansi pa 1.72x108rad/s ya r-radiation, mphamvu imakhalabe yosasintha.
5. Kukhalitsa
Pambuyo pakutsuka 100, kung'ambika kwa nsalu za m-aramid kumatha kufikira kupitilira 85% ya mphamvu zawo zoyambirira. Kutentha kwa ma para-aramid ndikokwera kwambiri kuposa kwa inter-aramid, ndikugwiritsa ntchito mosalekeza kutentha kwa -196 ° C mpaka 204 ° C ndipo palibe kuwola kapena kusungunuka pa 560 ° C. Chikhalidwe chofunikira kwambiri cha para-aramid ndi mphamvu yake yayikulu komanso modulus yayikulu, mphamvu zake zimaposa 25g / dan, zomwe ndi 5 ~ 6 nthawi zachitsulo chapamwamba kwambiri, 3 nthawi zagalasi zagalasi ndi nthawi 2 zaulusi wamphamvu wa nayiloni wamafakitale. ; modulus yake ndi 2 ~ 3 nthawi zachitsulo chapamwamba kwambiri kapena ulusi wagalasi ndi nthawi 10 za ulusi wamphamvu wa nayiloni wamafakitale. Mapangidwe apadera amtundu wa aramid zamkati, omwe amapezedwa ndi ma fibrillation a pamwamba pa ma aramid fibers, amawongolera kwambiri kugwirana kwa pawiri ndipo chifukwa chake ndi abwino ngati chiwongolero cholimbikitsira pamikangano ndi kusindikiza zinthu. Aramid Pulp Hexagonal Special Fiber I Aramid 1414 Zamkati, wopepuka wachikasu wonyezimira, wonyezimira, wokhala ndi ma plume ambiri, mphamvu yayikulu, kukhazikika kwabwino, kusakhazikika, kutentha kwambiri, kusamva dzimbiri, kulimba, kutsika pang'ono, kukana bwino kwa abrasion, malo akulu , kugwirizana kwabwino ndi zipangizo zina, kulimbikitsa zinthu ndi kubwerera kwa chinyezi cha 8%, kutalika kwa 2-2.5mm ndi pamwamba pa 8m2 / g. Amagwiritsidwa ntchito ngati chowonjezera cha gasket chokhala ndi mphamvu yabwino komanso yosindikiza, ndipo sichivulaza thanzi la anthu ndi chilengedwe, ndipo chingagwiritsidwe ntchito kusindikiza m'madzi, mafuta, zachilendo ndi zapakati mphamvu za asidi ndi alkali media. Zatsimikiziridwa kuti mphamvu ya mankhwalawa ndi yofanana ndi 50-60% ya asbestos fiber reinforced products pamene zosakwana 10% za slurry zimawonjezeredwa. Amagwiritsidwa ntchito kulimbitsa mikangano ndi kusindikiza zida ndi zinthu zina zopangidwa, ndipo chitha kugwiritsidwa ntchito ngati njira ina ya asibesitosi pazomata zomata, pepala losagwira kutentha kwambiri komanso zida zophatikizika.
Nthawi yotumiza: Aug-01-2022