iindaba

1.Izixhobo zefayibha zeAramid

Igama elipheleleyo le-aramid fiber yintsinga yepolyamide enevumba elimnandi.Yipolymer ehambelanayo eyenziwe ngamaqela anevumba elimnandi kunye namaqela e-amide.Ineempawu ezibalaseleyo zoomatshini, ubume bekhemikhali obuzinzile, iipropathi ezifanelekileyo zoomatshini, amandla aphezulu kunye nemodulus ephezulu., ukumelana nobushushu obuphezulu, ukuxhathisa kwe-asidi kunye ne-alkali, ubunzima obulula, ukuxhathisa ukunxiba kunye nezinye iimpawu ezintle.Isetyenziswe ngokubanzi kwiinkalo ezifana nezixhobo zokukhusela i-bulletproof, i-aerospace, ukwakhiwa kunye nezixhobo zombane.

Nangona kunjalo, i-aramid fiber nayo ineengxaki ezimbini ezinkulu

(1) Ifayibha yeAramid inokunganyangeki kwe-UV.Imitha ye-Ultraviolet (ukukhanya kwelanga) ibangela ukuthotywa kwemicu ye-aramid.Ngoko ke, kufuneka kubekho uluhlu olukhuselayo, olunokuthi lube yi-topcoat okanye uluhlu lwezinto eziphathekayo, umzekelo, imicu ye-aramid ivame ukuvalelwa kwindawo yokukhusela.

(2) I-fiber ye-Aramid ine-hygroscopicity ephezulu (ukuya kwi-6% yobunzima bayo), ngoko ke izinto ezidibeneyo ze-aramid fibre kufuneka zikhuselwe ngokufanelekileyo, ezifana ne-topcoats zivame ukusetyenziselwa ukunciphisa i-hygroscopicity.Ukongezelela, ukusetyenziswa kweentlobo ezithile ze-aramid kunciphisa ukufunxa kwamanzi kwi-composite xa evezwe emanzini, njenge-Kevlar 149 okanye i-Armos.

2.PE izixhobo zefayibha

I-PE eneneni ibhekisa kwi-UHMW-PE, eyi-polyethylene ephezulu kakhulu yemolekyuli.Ludidi oluphezulu olusebenza ngendalo oluphuhliswe ekuqaleni kweminyaka yoo-1980.Kunye ne-carbon fiber kunye ne-aramid, yaziwa njengeentsinga ezintathu eziphambili zetekhnoloji ephezulu kwihlabathi namhlanje.Inozinzo oluphezulu kakhulu kwaye kunzima kakhulu ukuthoba, nto leyo ebangela ungcoliseko olumandla lwemo engqongileyo.Kodwa ngokuchanekileyo ngenxa yolu phawu luba yinto efanelekileyo yokwenza isikrweqe somzimba.Ukongeza, iyamelana nobushushu obuphantsi, ukukhanya kwe-UV, kunye namanzi.

Ngokumalunga nokuthintela iibhulethi eziphantsi kwesantya, ukusebenza kwe-bulletproof ye-PE fiber malunga ne-30% ephezulu kune-aramid;ngokubhekiselele ekukhuseleni iibhulethi ezikhawulezayo, ukusebenza kwe-PE fiber yi-1.5 ukuya kwii-2 amaxesha e-aramid.Kunokuthiwa ukusilela kwefayibha ye-aramid ibe luncedo kwifiber ye-PE, kwaye iingenelo zefiber ye-aramid ziye zaba ngcono kwifiber ye-PE.Ke ngoko, yinto engenakuphepheka ye-PE fiber ukuba ithathe indawo ye-aramid kwindawo yokhuseleko.

Ewe kunjalo, i-PE fiber nayo ineziphene.Inqanaba layo lokumelana nobushushu lingaphantsi kakhulu kunefiber ye-aramid.Ukushisa kokusetyenziswa kweemveliso ze-PE zokukhusela i-fiber ngaphakathi kwe-70 ° C (enokuthi ihlangabezane neemfuno zomzimba womntu kunye nezixhobo, oko kukuthi, imfuno yokumelana nokushisa kwe-55 ° C).Ngaphandle kolu bushushu, ukusebenza kwehla ngokukhawuleza.Xa izinga lokushisa lidlula i-150 ° C, i-PE fiber iya kunyibilika, kwaye i-aramid fiber I-fiber isenako ukugcina iimpawu zokukhusela ezikhuselekileyo kwindawo ye-200 ° C, kwaye ayinyibiliki okanye idibanise kwi-500 ° C;xa udibana namaqondo okushisa aphezulu ngaphezu kwe-900 ° C, iya kuba yikhabhoni ngokuthe ngqo ukwenza umaleko wokushisa ubushushu.Ezi azifumaneki kwiimveliso ze-PE zokukhusela ifayibha kwaye ziye zaba ziinzuzo ezizodwa zeemveliso ze-aramid.