Nhanganyaya EVA Hot Melt Adhesive

EVA hot melt adhesive inonyungudutsa{{0}isina, mvura-isina, 100% yakasimba, fusible polymer. Iyo yakasimba patembiricha yekamuri uye inonyunguduka kuita inoyerera, viscous mvura inonamira kana ichipisa kune imwe nhanho. Mushure mekunyunguduka, iine ruvara rwebrown, inopenya kana kudzima-chena. Chinhu chikuru cheanopisa anonyungudika adhesive, iyo yekutanga resin, ndeye copolymer ye ethylene uye vinyl acetate pasi pekumanikidzwa kwakanyanya, yakasanganiswa ne tackifiers, viscosity modifiers, antioxidants, nezvimwe, kugadzira iyo inopisa inonyungudika inonamatira.

EVA ipurasitiki zvinhu zvinoumbwa ne ethylene (E) uye vinyl acetate (VA). Chiyero chemakemikari maviri aya anogona kugadziriswa kuti asangane nezvinodiwa zvakasiyana zvekushandisa. Iyo yakakwira vinyl acetate (VA yemukati) yemukati inoguma nekuvandudzwa pachena, kupfava, uye kuoma.

Ethylene-vinyl acetate copolymer (inozivikanwawo seethylene-vinyl acetate copolymer) inowanikwa necopolymerizing ethylene (E) uye vinyl acetate (VA). Zita rayo rechirungu rinonzi Ethylene Viny Acetate, rakadimburirwa seEVA kana E/VAC. Nzira dzepolymerization dzinosanganisira yakakwirira-kudzvanywa kwepolymerization (yemapurasitiki), solution polymerization (PVC processing aids), emulsion polymerization (adhesives), uye suspension polymerization. Emulsion polymerization inoshandiswa pavinyl acetate (VA) zviri pamusoro kupfuura 30%, ukuwo high-pressure bulk polymerization inoshandiswa kune yakaderera VA zvinyorwa. EVA ine huwandu hwakawanda hwekushandisa.

Kazhinji, EVA ine vinyl acetate yemukati pazasi 5% inonyanya kushandiswa kwemafirimu, LDPE modifiers kune waya netambo, uye adhesives; EVA ine vinyl acetate ye5% -10% inoshandiswa kune elastic mafirimu; EVA ine vinyl acetate inokwana 20% -28% inonyanya kushandiswa kune inopisa kunyunguduka adhesives uye coating zvigadzirwa; uye EVA ine vinyl acetate yemukati ye5% -45% inonyanya kushandiswa kumafirimu (kusanganisira mafirimu ekurima) nemashiti, majekiseni akaumbwa uye akaumbwa, zvigadzirwa zvine furo, uye inopisa inonyunguduka inonamatira. Inoshandiswa zvakanyanya muhupfu hweshangu zvinhu, anoshanda greenhouse mafirimu, kurongedza molds, inopisa inonyunguduka inonamatira, waya netambo, uye matoyi.