Kev cuam tshuam ntawm VA cov ntsiab lus ntawm EVA kub-melt nplaum rau kev ua haujlwm thiab kev siv

EVA (tseem hu ua E / VAC lossis E / VAC), lub npe scientific: ethylene-vinyl acetate copolymer (tseem hu ua ethylene-vinyl acetate copolymer) yog tau los ntawm copolymerizing ethylene (E) thiab vinyl acetate (VA).

Kub yaj nplaum nplaum nrog EVAresin raws li lub ntsiab tivthaiv, vim hais tias nws tsis muaj hnyav, tsis muaj kuab paug ib puag ncig thiab muaj kev ruaj ntseg siab, yog heev haum rau tsis siv neeg sib dhos kab ntau lawm, yog li nws yog dav siv nyob rau hauv: phau ntawv khi, rooj tog zaum banding, tsheb thiab tsev neeg los ua ke. ntawm cov khoom siv hluav taws xob, khau-ua, cov ntaub pua plag thiab hlau tiv thaiv corrosion txheej, number case, nra, lub raj mis, thiab lwm yam., yog li kuv lub teb chaws kev lag luam txhua xyoo tau nce ntxiv.

Yog li yuav ua li cas los tsim EVA kub yaj nplaum haum rau txhua qhov chaw ntawm lub neej? Thawj qhov xwm txheej yog saib VA cov ntsiab lus.

vinyl acetate VA cov ntsiab lus dav dav yog li 5% -40%. EVA muaj elasticity zoo thiab yoog raws, zoo kub tsis tshua muaj kev cuam tshuam, thiab tuaj yeem siv rau hauv qhov txias thiab kub kub rho tawm 20-40 degrees; zoo tshav kub sealing kev ua tau zoo thiab tsawg melting point.

Qhov ceev ntawm EVA kuj tau txiav txim siab los ntawm qib VA cov ntsiab lus. Qhov siab dua ntawm VA cov ntsiab lus, qhov ze ntawm cov resin yog roj hmab, yog li nws cov hardness yuav qis dua li ntawm cov khoom qub. Tsis tas li ntawd, qhov sib txawv ntawm VA cov ntsiab lus kuj txiav txim siab seb cov khoom yuav tsum ua li cas. Yog tias VA cov ntsiab lus qis dua 5%, nws tuaj yeem siv los ua ib qho cable. Yog li feem ntau, thaum VA cov ntsiab lus nyob rau hauv thaj tsam ntawm 10% ~ 20%, nws yog cov khoom siv yas, thiab thaum cov ntsiab lus VA siab tshaj 30%, nws yog cov khoom siv elastic.