Mazgu ghakwamba gha EVA Hot Melt

EVA kutentha kusungunuka kumatira ni vyakusungunuka-wambura, maji -wambura, 100% wakukhora, fusible polymer. Iwo ukukhora para ukutenthema mu chipinda ndipo ukusungunuka na kuŵa nga ni maji ghakusunkhunyika, ghakukhozga para ŵawutenthemeska kufika pa mlingo unyake. Pamanyuma pa kusungunuka, ni chinthu cha bulawuni wakupepuka, chakuwonekera panji chambura -chituŵa. Chigaŵa chikuru cha vyakumatira vyakusungunuka vyakotcha, resini yakwamba, ni copolymer ya ethylene na vinyl acetate pasi pa nkhongono yikuru, pamoza na vyakukhozga, vyakusintha viscosity, vyakukhozga thupi, na vinyake, kuti vipangiske vyakumatira vyakusungunuka vyakotcha.

EVA ni chinthu cha pulasitiki icho chikupangika na ethylene (E) na vinyl acetate (VA). Chiŵelengero cha makemikolo ghaŵiri agha chingasinthika kuti chikolerane na ivyo vikukhumbikwa pakugwiriskira nchito mwakupambanapambana. Vinyl acetate (VA content) yinandi yikupangiska kuti vinthu viwoneke makora, viŵe vyakufewa, ndiposo viŵe vyakukhora.

Ethylene - vinyl acetate copolymer (yo yikumanyikwaso kuti ethylene - vinyl acetate copolymer) yikusangika mwa kuphatikizga ethylene (E) na vinyl acetate (VA). Zina lake la Chingelezi ni Ethylene Viny Acetate, ilo likufupikizgika kuti EVA panji E / VAC. Nthowa zakupangira polymerization zikusazgapo kupanga polymerization yakukwana (ya mapulasitiki), kupanga polymerization ya yankho (vyakovwira pakupanga PVC), kupanga polymerization ya emulsion (vyakumatira), na polymerization yakuyimika. Emulsion polymerization yikugwiriskirika nchito pa vinyl acetate (VA) iyo yili na vinthu vyakujumpha 30%, apo polymerization ya pamwamba - yakupanikizgika yinandi yikugwiriskirika nchito pa VA iyo yili pasi. EVA ili na mitundu yakupambanapambana ya mapulogalamu.

Kanandi, EVA iyo yili na vinyl acetate iyo yili pasi pa 5% yikugwiriskirika nchito comene pa mafilimu, vyakusintha vya LDPE pa mawaya na makhebo, na vyakumatira; EVA iyo yili na vinyl acetate ya 5%-10% yikugwiriskirika nchito pa mafilimu ghakukhozga; EVA iyo yili na vinyl acetate ya 20%-28% yikugwiriskirika nchito comene pa vyakumati vyakusungunuka vyakotcha na vyakuvwara vyakuvwara; ndipo EVA iyo yili na vinyl acetate ya 5%-45% yikugwiriskirika nchito comene pa mafilimu (kusazgapo mafilimu gha ulimi) na ma sheet, vinthu vyakupangika na jekeseni na kupangika, vinthu vyakupangika na thovu, na vyakumati vyakusungunuka vyakotcha. Iwo ŵakugwiliskira ntchito chomene pa vinthu vyakupangira nsapato zakupangika na thovu, mafilimu ghakugwira ntchito gha greenhouse, nkhungu zakupakira, vyakumatira vyakusungunuka vyakotcha, mawaya na makhebo, na vyakuseŵereska.