Iyo ugura ibintukunyerera n'ubundi bwoko bw'inkweto,nka sandali cyangwa clogs, kimwe mu bibazo bikunze kugaragaraibyoabantu Gicurasi kubaza ni hafiibikoresho-byumwihariko, EVA ni iki? EVA sole ninkweto yinkweto ninyungu nyinshi zituma iba ishingiro ryiza kuri slippers.Muri make, inkweto ya EVA ni inkweto ya plastike ishobora kuba yoroshye kandi yoroshye kuruta reberi.Ubu ni ubuso bwibyo aribyo byose nibyiza nibyiza bya EVA sumunwaers.
EVA, mu buryo bwa shimi, ni Ethylene-Vinyl Acetate, co-polymer ya elastike isa cyane na reberi kandi ikoreshwa no mubikorwa byo murugo n'inganda.EVA ifatwa nkibidukikije kuberako idakora't gukoresha chlorine mubikorwa byayo, kandi irashobora gukoreshwa mubicuruzwa nkibibuga by'imikino cyangwa matelo yinganda.Kuberako ikozwe n'abantu kandi inyamanswa, ikoreshwa mubirato bikomoka ku bimera.EVA itanga umusego, isoko (rebound), kandi irwanya gukomera no guturika.Irwanya kandi imirasire ya UV, ntabwo't ikurura amazi, kandi igahinduka mugihe cy'ubukonje, byose bituma bigira akamaro cyane mukwambara inkweto zo hanze.Byoroheje kandi byoroshye, EVA muburyo bwa tekiniki ni ifuro aho kuba reberi, kuko ikorwa mukwagura plastike no gufata imifuka ya gaze (umwuka) mubucucike butandukanye.Inkweto nyinshi ziruka kandi zisanzwehanzeinkweto zakozwe muri EVA.Mu myaka yashize, ibirango bike byahinduye PU (polyurethane) kugirango byubake birambahanzetekinoroji yonyine, cyane cyane mugupakira inkweto.Ariko EVA iracyagaragara ko yagaruye byinshi, mugihe igera mubuzima bwanyuma (compression) byihuse kuruta PU.Wowe'll reba ibirango byinshi biruka bikoresha ibintu byihariye bya reberi ivanze na EVA.Mugihe isoko yinkweto ikora rwose yahinduye udushya twa EVA midsole, ubu irakoreshwa cyane mubwoko bwose bwinkweto, harimo, niba atari cyane, sandali.EVA yonyine ntabwo itanga gusa kwisubiraho no kuryama hejuru, ahubwo irinda ibirenge ingaruka nkuko buri kirenge gikubita hasi.Kwisubiraho muri EVA bigufasha kuva kuri buri ntambwe.Ariko nkibintu byiza byose, EVA irarangira.Igihe kirenze, EVA izagabanya kandi irekure kugaruka kwayo, icyo gihe igomba gusimburwa.Ku nkweto yiruka, bisaba ibirometero 300 kugirango ugere aha.Ku zindi nkweto, Ibi bikunze kubaho kuri compresses, igatakaza imbaraga, kandi amaherezo igera aho igomba gusimburwa, akenshi nyuma yibirometero 300 kurukweto rwiruka.Ibi biratandukanye birumvikana nukuntu umukoresha aremereye, kugenda kwabo nibirometero bwoko bashira kurukweto.EVA midsoles mubisanzwe ni inshinge.Kugirango ugere kuramba, abakora inkweto benshi bakoresha compression-yakozwe na EVA midsoles.Muri ubu buryo, EVA ikandamizwa muburyo kugirango midsole-to-be ikore uruhu rwimbere.Ibi byongera ubuzima kuri midsole, imiterere ya torsional, kandi itanga uburyo bwo gushushanya nkamabara, ibishushanyo na logo.Ukoresheje EVA, abayikora barashobora kandi gukora ubunini butandukanye nubucucike, bakongeramo umusego mwinshi munsi yitsinda, igorofa ryoroshye hejuru yurwego rukomeye, nicyo bita“kohereza”kugirango wirinde kuvuga ikirenge mugihe cyo kugenda no kwiruka.Umunsi urangiye, menya gusa ko EVA aribwo buryo bworoshye, bworoshye hagati yo hejuru no hanze yinkweto zawe zibaho bikurinda kandi wongereho isoko rito ku ntambwe yawe.
Igihe cyo kohereza: Ukwakira-12-2021