Yeyiphi eNgcono, iKevlar Fiber okanye iPE Fiber kwiMaterial?

Okokuqala, nika isifundo intshayelelo emfutshane ye-aramid kunye ne-PE.

Izixhobo zefayibha zeAramid iAramid, ekwaziwa ngokuba yiKevlar (igama lekhemikhali yiphthalamide) yazalwa ekupheleni kweminyaka yoo-1960.Luhlobo olutsha lwe-high-tech fiber synthetic fiber, enokumelana nobushushu obuphezulu, i-asidi kunye nokumelana ne-alkali., Ubunzima bokukhanya, amandla aphezulu kunye nezinye izinto ezilungileyo, zisetyenziswe ngokubanzi kwizixhobo zokukhusela, ukwakhiwa kunye nezixhobo zombane kunye nezinye. amasimi.

Kodwa i-aramid ineentsilelo ezimbini ezibulalayo:
1) Iya kuthotywa xa idibana nemitha ye-ultraviolet;kulula ukwenza i-hydrolyze, nokuba igcinwe kwindawo eyomileyo, iya kutsala umswakama emoyeni kwaye ngokuthe ngcembe i-hydrolyze.
Ngoko ke, i-aramid bulletproof inserts kunye ne-bulletproof vests ayifanelekanga ukusetyenziswa kwexesha elide kwi-ultraviolet eqinile kunye neendawo ezinomswakama, eziza kunciphisa kakhulu ukusebenza kwazo kokukhusela kunye nobomi benkonzo.Ukongeza, uzinzo olulambathayo kunye nobomi obufutshane be-aramid bukwanciphisa usetyenziso olongezelelweyo lwe-aramid kwintsimi ye-bulletproof.
Ixabiso le-aramid ekumgangatho ophezulu nalo liphezulu kunelo le-PE, elinokuba ngama-30% ukuya kwi-50% ngaphezulu.Okwangoku, iimveliso ze-bulletproof ezisebenzisa i-aramid ziye zehla kancinci kwaye zaqala ukutshintshwa ziimveliso zePE bulletproof.Ngaphandle kokuba kwindawo ekhethekileyo okanye ineemfuno ezikhethekileyo, ezifana nobushushu obuphezulu boMbindi Mpuma, kucetyiswa ukuba kusetyenziswe izixhobo ze-PE eziphathekayo.

1. I-PE ekhankanywe ngaphambili kwizixhobo zefayibha ze-PE ngokwenene ibhekisa kwi-UHMW-PE, eyi-ultra-high molecular weight polyethylene.Yifiber esebenza ngokuphezulu eyaphuhliswa ekuqaleni kweminyaka yoo-1980, kwaye ibizwa ngokuba lihlabathi namhlanje kunye ne-carbon fiber kunye ne-aramid.Iintsinga ezintathu ezikumgangatho ophezulu.Iingxowa zeplastiki ezisetyenziswa kubomi bethu bemihla ngemihla ngokwenene ziyimveliso ye-polyethylene, enozinzo oluphezulu kwaye kunzima kakhulu ukuthoba, nto leyo ebangela ungcoliseko olumandla lwendalo.Kodwa kanye ngenxa yolu phawu kuye kwaba yinto efanelekileyo yokwenza isikrweqe somzimba.Ukongeza, ineempawu zokumelana nobushushu obuphantsi, ukuxhathisa kwe-UV, kunye nokumelana namanzi.
Ngokubhekiselele ekukhuseleni kwiibhulethi eziphantsi kwesantya, i-UHMW-PE ye-fiber ye-ballistic resistance imalunga ne-30% ephezulu kune-fiber aramid;
Ngokubhekiselele ekukhuseleni kwi-bullets yesantya esiphezulu, amandla okukhusela i-bulletproof ye-UHMW-PE fiber yi-1.5 ukuya kwi-2 amaxesha e-aramid fiber, ngoko i-PE okwangoku ibonwa njengeyona nto iphezulu ye-bulletproof.

Nangona kunjalo, i-UHMW-PE ineziphene ezithile: ukumelana nobushushu obuphezulu kungaphantsi kakhulu kunoko kwe-aramid.Ubushushu bokusetyenziswa kweemveliso ze-bulletproof ze-UHMWPE kufuneka zilawulwe ngaphakathi kwe-80 ° C (enokuthi ihlangabezane neemfuno zobushushu bomzimba womntu kunye nezixhobo - ukumelana nobushushu obungama-55 ° C).Emva kokuba lo bushushu bugqithisiwe, ukusebenza kwayo kuya kuhla ngokukhawuleza, kwaye xa izinga lokushisa lifikelela kwi-150 ° C okanye ngaphezulu, liya kunyibilika.Iimveliso ze-aramid bulletproof zisengagcina isakhiwo esizinzileyo kunye nokusebenza kakuhle kokhuseleko kwindawo yobushushu obuphezulu obungama-200 ℃.Ngoko ke, iimveliso ze-PE bulletproof azifanelekanga ukusetyenziswa kwiindawo eziphezulu zokushisa.
Ukongeza, ukuxhathisa kwe-PE akulunganga njengaleyo ye-aramid, kwaye izixhobo ezisebenzisa i-PE ziya konakala kancinci xa ziphantsi koxinzelelo oluqhubekayo.Ke ngoko, izixhobo ezinje ngeehelmethi ezinemilo entsonkothileyo kwaye zifuna ukumelana noxinzelelo ixesha elide azinakwenziwa ngePE.
Ukongeza kwezi mpawu, ixabiso le-PE liphantsi kakhulu kune-aramid njengoko kuchaziwe ngaphambili.
Ngokubanzi, i-PE kunye ne-aramid zinezibonelelo zazo kunye nokungalunganga.Nangona kunjalo, isetyenziswa ngokubanzi kule mihla ukusebenzisa i-PE njengomaleko wokuthintela iimbumbulu.Kuseyimfuneko ukuba ukhethe isixhobo sokuthintela iimbumbulu esikufaneleyo ngokwemeko yakho yokwenyani.