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 ye-synthetic fiber, enokumelana nobushushu obuphezulu, i-asidi kunye nokumelana ne-alkali., Ubunzima bokukhanya, amandla aphezulu kunye nezinye izinto ezilungileyo, zisetyenziswe ngokubanzi kwizixhobo zokukhusela i-bullet-proof, 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 nekhabhoni 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 esingqongileyo. 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 kwiibhulethi zesantya 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.