Choyamba, perekani phunzirolo mwachidule ku aramid ndi PE.
Zida za Aramid fiber Aramid, yemwe amadziwikanso kuti Kevlar (mankhwala dzina lake ndi phthalamide) anabadwa chakumapeto kwa zaka za m'ma 1960. Ndi mtundu watsopano waukadaulo wapamwamba wopanga, womwe uli ndi kukana kutentha kwambiri, asidi ndi kukana kwa alkali., Kulemera kopepuka, mphamvu yayikulu ndi zabwino zina, zakhala zikugwiritsidwa ntchito kwambiri pazida zodzitchinjiriza zachipolopolo, zomanga ndi zida zamagetsi ndi zina. minda.
Koma aramid ilinso ndi zolakwika ziwiri zowopsa:
1) Idzawonongeka ikakumana ndi kuwala kwa ultraviolet; ndizosavuta ku hydrolyze, ngakhale zitasungidwa pamalo owuma, zimayamwa chinyezi mumlengalenga ndipo pang'onopang'ono hydrolyze.
Chifukwa chake, zoyikapo za aramid bulletproof ndi zovala zoteteza zipolopolo sizoyenera kugwiritsidwa ntchito kwa nthawi yayitali m'malo amphamvu a ultraviolet ndi chinyezi, zomwe zingachepetse kwambiri chitetezo chawo komanso moyo wawo wautumiki. Kuphatikiza apo, kusakhazikika kosasunthika komanso moyo waufupi wa aramid kumachepetsanso kugwiritsa ntchito aramid pagawo la bulletproof.
Mtengo wa aramid wapamwamba kwambiri ndi wapamwamba kuposa wa PE, womwe ukhoza kukhala 30% mpaka 50% kuposa. Pakadali pano, zinthu zoteteza zipolopolo zogwiritsa ntchito aramid zatsika pang'onopang'ono ndipo zayamba kusinthidwa ndi zida za PE. Pokhapokha ngati ili pamalo apadera kapena ili ndi zofunikira zapadera, monga kutentha kwa Middle East, tikulimbikitsidwa kugwiritsa ntchito zipangizo za PE za bulletproof.
1. PE yotchulidwa kale mu PE fiber zida kwenikweni amatanthauza UHMW-PE, amene ali kopitilira muyeso-mkulu molekyulu kulemera polyethylene. Ndi organic fiber yogwira ntchito kwambiri yomwe idapangidwa kumayambiriro kwa zaka za m'ma 1980, ndipo imatchedwa dziko lero limodzi ndi mpweya wa carbon ndi aramid. Zingwe zitatu zapamwamba kwambiri. Matumba apulasitiki omwe amagwiritsidwa ntchito m'moyo wathu watsiku ndi tsiku ndi zinthu za polyethylene, zomwe zimakhala zokhazikika kwambiri ndipo zimakhala zovuta kuzitsitsa, zomwe zimayambitsa kuwonongeka kwa chilengedwe. Koma ndi chifukwa cha chikhalidwe ichi chomwe chakhala chinthu choyenera kupanga zida za thupi. Kuphatikiza apo, ili ndi mawonekedwe otsika kutentha, kukana kwa UV, komanso kukana madzi.
Pankhani yodzitetezera ku zipolopolo zothamanga kwambiri, UHMW-PE fiber ya ballistic resistance ndi pafupifupi 30% kuposa ya aramid fiber;
Pankhani yodzitetezera ku zipolopolo zothamanga kwambiri, mphamvu ya bulletproof ya UHMW-PE fiber ndi 1.5 mpaka 2 nthawi ya fiber aramid, kotero PE panopa imadziwika kuti ndipamwamba kwambiri.
Komabe, UHMW-PE ilinso ndi zofooka zina: kukana kwake kutentha kumakhala kochepa kwambiri kuposa kwa aramid. Kutentha kogwiritsidwa ntchito kwa zinthu zoteteza zipolopolo za UHMWPE kuyenera kuyendetsedwa mkati mwa 80 ° C (zomwe zimatha kukwaniritsa zofunikira za kutentha kwa thupi la munthu ndi zida - kukana kutentha kwa 55 ° C). Kutentha kumeneku kukadutsa, ntchito yake idzatsika mofulumira, ndipo kutentha kukafika 150 ° C kapena kupitirira, kumasungunuka. Zopangidwa ndi ma aramid bulletproof zimathabe kukhala zokhazikika komanso chitetezo chabwino m'malo otentha kwambiri a 200 ℃. Chifukwa chake, zinthu zopanda zipolopolo za PE sizoyenera kugwiritsidwa ntchito m'malo otentha kwambiri.
Kuphatikiza apo, kukana kwa PE sikwabwino ngati kwa aramid, ndipo zida zogwiritsa ntchito PE zimapunduka pang'onopang'ono zikakanikizidwa mosalekeza. Choncho, zipangizo monga zisoti zomwe zimakhala ndi mawonekedwe ovuta ndipo zimafunika kupirira kupanikizika kwa nthawi yaitali sizingapangidwe ndi PE.
Kuphatikiza pa izi, mtengo wa PE ndi wotsika kwambiri kuposa wa aramid monga tafotokozera kale.
Mwambiri, PE ndi aramid ali ndi zabwino ndi zoyipa zawo. Komabe, imagwiritsidwa ntchito kwambiri masiku ano kugwiritsa ntchito PE ngati wosanjikiza wosanjikiza zipolopolo. Ndikofunikirabe kusankha zida zoteteza zipolopolo zomwe zimakuyenererani malinga ndi momwe mulili.
Nthawi yotumiza: Aug-20-2021
