Taw qhia rau EVA Kub Melt Adhesive

EVA kub yaj nplaum nplaum yog ib qho hnyav -dawb, dej-dawb, 100% khoom, fusible polymer. Nws yog khoom nyob rau hauv chav tsev kub thiab melts mus rau hauv ib tug flowable, viscous kua nplaum thaum rhuab mus rau ib tug tej degree. Tom qab melting, nws yog lub teeb xim av, translucent los yog tawm - cov khoom dawb. Cov khoom tseem ceeb ntawm cov nplaum nplaum kub, cov khoom siv yooj yim, yog copolymer ntawm ethylene thiab vinyl acetate nyob rau hauv kev kub siab, ua ke nrog tackifiers, viscosity modifiers, antioxidants, thiab lwm yam, los tsim cov kub yaj nplaum.

EVA yog cov khoom yas uas muaj ethylene (E) thiab vinyl acetate (VA). Qhov piv ntawm ob cov tshuaj no tuaj yeem hloov kho kom tau raws li kev thov sib txawv. Cov ntsiab lus ntau dua vinyl acetate (VA cov ntsiab lus) ua rau txhim kho pob tshab, softness, thiab toughness.

Ethylene-vinyl acetate copolymer (tseem hu ua ethylene-vinyl acetate copolymer) yog tau los ntawm copolymerizing ethylene (E) thiab vinyl acetate (VA). Nws lub npe Askiv yog Ethylene Viny Acetate, abbreviated li EVA lossis E / VAC. Cov txheej txheem polymerization muaj xws li siab - siab ntau polymerization (rau cov yas), kua polymerization (PVC ua pab), emulsion polymerization (adhesives), thiab suspension polymerization. Emulsion polymerization yog siv rau vinyl acetate (VA) cov ntsiab lus siab dua 30%, thaum siab - siab bulk polymerization yog siv rau cov ntsiab lus VA qis. EVA muaj ntau yam kev siv.

Feem ntau, EVA nrog vinyl acetate cov ntsiab lus hauv qab 5% feem ntau yog siv rau cov yeeb yaj kiab, LDPE modifiers rau cov xov hlau thiab cables, thiab cov nplaum nplaum; EVA nrog vinyl acetate cov ntsiab lus ntawm 5% -10% yog siv rau cov yeeb yaj kiab elastic; EVA nrog vinyl acetate cov ntsiab lus ntawm 20% -28% feem ntau yog siv rau kub yaj nplaum nplaum thiab txheej khoom; thiab EVA nrog vinyl acetate cov ntsiab lus ntawm 5% -45% feem ntau yog siv rau cov yeeb yaj kiab (nrog rau cov yeeb yaj kiab ua liaj ua teb) thiab cov nplooj ntawv, cov khoom siv tshuaj molded thiab molded, cov khoom foamed, thiab cov nplaum kub yaj. Nws yog dav siv hauv cov ntaub ntawv khau foamed, ua haujlwm hauv tsev xog paj zaj duab xis, ntim pwm, kub yaj nplaum nplaum, xov hlau thiab cables, thiab cov khoom ua si.