Iyini impahla ye-EVA? Ukuhlaziywa okuphelele kwezici kanye nokusetshenziswa kwezinto ze-EVA
I-EVA iyinto evamile futhi esetshenziswa kabanzi embonini yamakhemikhali, iyini i-EVA? Kulesi sihloko, sizokwethula ngokuningiliziwe izici eziyisisekelo ze-EVA, inqubo yokukhiqiza kanye nokusetshenziswa kwayo ezimbonini ezihlukene ukukusiza ukuthi uqonde kangcono le nto esebenza ngezinto eziningi.
Okokuqala, incazelo eyisisekelo kanye nokwakheka kwe-Eva
I-EVA (i-ethylene vinyl acetate copolymer) iyimpahla ye-polymer eyenziwe nge-copolymerization ye-ethylene ne-vinyl acetate (VA). Isakhiwo salo samakhemikhali sinquma ukuguquguquka kwayo okuhle kakhulu, ukumelana kwamakhemikhali kanye nephuzu eliphansi lokuncibilika.Izici ze-EVA zingashintshwa ngokushintsha okuqukethwe kwe-vinyl acetate, okuqukethwe okuphezulu, okungcono ukuguquguquka kwezinto ezibonakalayo, kodwa amandla omshini ayancipha.
Okwesibili, inqubo yokukhiqiza ye-Eva
Ukukhiqizwa kwe-EVA ikakhulukazi nge-high-pressure polymerisation reaction. Enqubweni ye-polymerisation, i-ethylene ne-vinyl acetate ekushiseni okuphezulu nokucindezela okuphezulu ngokusebenzisa i-copolymerization ye-radical free radical, ukwakheka kwamanani ahlukene e-VA EVA resin. Ukulungiswa kwenqubo yokukhiqiza kungathinta ukusebenza kwempahla, isibonelo, okuqukethwe okuphezulu kwe-vinyl acetate kungathuthukisa ukucaca nokuthambile kwe-EVA, i-EVA resin ingacutshungulwa ngokuqhubekayo ibe yifilimu, ishidi noma izinto ze-foam, ezisetshenziswa ezinhlobonhlobo zezicelo zezimboni.
Okwesithathu, izici eziyinhloko zezinto ze-Eva
Impahla ye-EVA isetshenziswa kabanzi ngenxa yezakhiwo zayo ezihlukile zomzimba namakhemikhali. Inokuguquguquka okuhle nokunwebeka, ngisho nasemazingeni okushisa aphansi ingahlala ithambile.I-EVA inokumelana nomthelela omuhle kakhulu nokumelana nokuhuzuka, okuyenza ibe nesidingo sokuqina nokuvikelwa kokusetshenziswa kokusebenza okuhle kakhulu.Impahla ye-EVA nayo inokumelana okuhle emisebeni ye-ultraviolet nokumelana namakhemikhali, okwenza ifanelekele ukusetshenziswa ngaphandle.
Okwesine, izindawo zokusetshenziswa kwezinto ze-Eva
Ngemva kokuqonda ukuthi i-EVA impahla iyini, ake sibheke izindawo zayo eziyinhloko zokusetshenziswa, impahla ye-EVA isetshenziswa kabanzi ekwenzeni izicathulo, ikakhulukazi ekukhiqizeni amasoli nama-midsoles, ngenxa yokusebenza kwayo okuhle kokugoba kanye nezici ezingasindi ziyathandwa, i-EVA iphinde isetshenziswe embonini yokupakisha, eyenziwe ngegwebu elivikelayo noma ifilimu, esetshenziswa emikhiqizweni ye-elekthronikhi ekhuphukayo, futhi kancane kancane i-EVA isetshenziselwa ukupakishwa kwezokwelapha embonini yezokwelapha! I-EVA futhi kancane kancane ikhulisa ukusetshenziswa kwayo embonini yezokwelapha, ikakhulukazi esetshenziselwa ukwenza izikhwama zokumnika kanye nokupakishwa kwemithi.
Okwesihlanu, intuthuko yesikhathi esizayo yezinto zokwakha ze-EVA
Ngokuthuthukiswa kokuqwashisa ngemvelo, izinto ze-EVA nazo zisendleleni yentuthuko esimeme. Ucwaningo lwempahla ye-EVA ewohlokayo selusebenza ngokugcwele, ikusasa lingase lethule izinto ze-EVA ezinobungani kwemvelo ukuze kuhlangatshezwane nezidingo zezindawo ezahlukene. Ngokuthuthuka kwesayensi nobuchwepheshe, ukusebenza kwezinto ze-EVA kulindeleke ukuthi kuthuthukiswe futhi, kuvuleke ezinye izimo zokufaka izicelo.
Isiphetho
I-EVA iyinto esebenza kahle kakhulu kanye nezinhlobonhlobo zezinhlelo zokusebenza. Ngesethulo salesi sihloko, kufanele ube nokuqonda okujulile ngodaba lokuthi “yini impahla ye-EVA”. Kungakhathaliseki ukuthi ekuphileni kwansuku zonke, imikhiqizo yezimboni, noma izinsiza zezokwelapha, izinto ze-EVA zidlala indima ebalulekile. Ngokuzayo, ngokuqhubeka kobuchwepheshe kanye nezidingo zokuvikelwa kwemvelo, ukusetshenziswa kwezinto ze-EVA kuzoba amathemba abanzi.