UHMWPE vs. Aramid: Ndeipi Fiber Inoshanda Zvikuru Yaunoda Chaizvoizvo?

Munyika yezvinhu zvemhando yepamusoro, mazita maviri ndiwo anonyanya kutaurwa pese panodiwa simba, kugara kwenguva refu, uye dziviriro:Polyethylene ine huremu hwakanyanya (UHMWPE)uyeAramid (inowanzozivikanwa nemazita emhando dzakadai seKevlar® kana Twaron®). Zvese izvi mabasa anoshamisa einjiniya, asi hazvichinjiki. Kusarudza chisiri icho chauri kushandisa kunogona kutungamira mukukundikana nekukurumidza kana kuti pamitengo isingakoshi.

At Huidun UHMWPE, isu tine hunyanzvi mukusundira miganhu yetekinoroji yefiber yepolyethylene. Zvisinei, tinotenda mukupa vatengi vedu mukana wakajeka wekuti zvinhu izvi zvinoungana sei. Mugwaro rino, tichanyatsoongorora hunhu hwehunyanzvi, zvakanakira, uye zvipingamupinyi zvefiber dzese kuti tikubatsire kuita sarudzo yekutenga neruzivo.

Kuti tinzwisise mashandiro adzo, tinofanira kutarisa DNA yadzo yemamorekuru. UHMWPE ipolyolefin yakagadzirwa nemaketani marefu kwazvo epolyethylene. Maketani aya anonamirana nenzira imwe chete, zvichigadzira chinhu uko masimba epakati pemamorekuru anowedzera, zvichikonzera fiber yakasimba zvikuru asi yakareruka zvakakwana kuti iyangarare pamusoro pemvura.

Asi Aramid, kune rumwe rutivi, ipolyamide inonhuhwirira yakagadzirwa. Maumbirwo ayo emamorekuru ane mhete dzakasimba dzakabatana nehydrogen bonds dzakasimba. Izvi zvinoita kuti Aramid isanyanya kupiswa nekupisa nemakemikari, asi inoita kuti ive nehuremu hwakanyanya kupfuura polyethylene.

Kana purojekiti yako ichida simba rakawanda kwazvo nehukuru hwakaderera,UHMWPE ndiyo yakakunda zviri pachenaInonyanya kuonekwa sefayibha yakasimba kwazvo pasi rose zvichienderana nehuremu—yakasimba kanenge ka15 kupfuura simbi uye yakasimba zvakanyanya kupfuura fayibha dzeAramid.

Nekuti UHMWPE ine huwandu husingasviki 1.0 g/cm³, inoyangarara. Izvi zvinoita kuti ive ndiyo nzira yakanakisisa yekushandisa mugungwa, senge tambo dzekunamatira mugungwa rakadzika uye tambo dzekudhonza. Aramid, kunyangwe yakasimba, inorema ne40% uye inonyura mumvura. Kune maindasitiri akadai sendege kana zvombo zvemunhu uko gramu yega yega inoverengwa, kuchengetedza huremu kunopihwa neUHMWPE fibers kubva kuHuidun kunogona kuchinja zvakanyanya.

Chitsitsinho cheUHMWPE chinonzi Achilles inokonzerwa nekunzwa kwayo kupisa. Sezvo iri thermoplastic, UHMWPE inotanga kupfava inosvika 80°C kusvika 100°C uye inonyunguduka pa144°C kusvika 152°C. Izvi zvinoderedza kushandiswa kwayo munzvimbo dzine tembiricha yakakwira inogara iripo, senge zvishandiso zvekudzima moto kana mabhandi emaindasitiri ane friction yakakwira.

Aramid ndiyo mambo asingapokane wekudzivirira kupisa. Hainyungudike; panzvimbo pezvo, inoshanduka kuita kabhoni pakupisa kunodarika 400°C. Kana kushandiswa kwako kuchisanganisira murazvo wakananga, kukweshana kwekupisa kwakanyanya, kana nzvimbo dzinopisa zvakanyanya, Aramid ingangove sarudzo iri nani. Zvisinei, kune akawanda mashandisirwo ekunze, ehunyanzvi, uye emaindasitiri uko tembiricha dziri mukati mehuwandu hwakajairwa, mashandiro eUHMWPE anoramba ari nani.

Mumamiriro ezvinhu chaiwo, zvinhu zvakatipoteredza zvinowanzo sarudza hupenyu hwechinhu. Apa ndipo panodiwaUHMWPE inobudirirazvakanyanya kupfuura Aramid:

Pakudzivirira bhora uye magiya asingacheki, zvese zvinoshandiswa zvakanyanya, asi zvinopa "manzwiro" akasiyana uye mashandiro akasiyana. UHMWPE ine coefficient yakaderera yekukweshana, izvo zvinoita kuti inzwe "yakapfava". Izvi zvinoita kuti ishande zvakanaka pakutsvedza panzvimbo dzinokwesha, zvichiita kuti tambo nemabhegi ebasa zvisanyanya kupfekwa.

Mukushandiswa kwe ballistic (senge ma vest asingapindi mabara), UHMWPE inowanzo shandiswa nekuda kwekugona kwayo kuparadzira simba nekukurumidza kuburikidza ne fiber network, ichipa dziviriro yakanaka kubva kuzvidimbu zvinomhanya zvakanyanya ukuwo iri nyore kutakura kune anoipfeka. Aramid ichiri kukosheswa nekuda kwekuoma kwayo uye kuramba kwayo kubhoorwa, asi maitiro eindasitiri ari kufambira mberi kune UHMWPE-based composites yezvishandiso zvemazuva ano, zvakareruka.