Yawancin thermoplastics za a iya busa samar da fim tare da gyare-gyaren gyare-gyare, busa fim ɗin filastik shine a matse a cikin bututu mai bakin ciki, sannan a buga da iska mai matsa lamba don busa filastik filastik, bayan sanyaya don kammala ƙirar samfuran membrane tubular, irin wannan aikin fim ɗin tsakanin. daidaitacce fim da shimfiɗa fim: ƙarfi ne mafi alhẽri daga mikewa fim, zafi sealing muni fiye da shimfiɗa fim.
Akwai nau'ikan fim da yawa da ake samarwa ta hanyar gyare-gyaren busa, kamarƘananan density polyethylene (LDPE), Linear polyethylene (LLDPE), polypropylene (PP), babban yawa polyethylene (HDPE), nailan (PA), ethylene ethylene acetate copolymer (EVA), da dai sauransu. .
1. Ya kamata a busa kayan albarkatun da aka zaɓa na fim ɗin nau'in nau'in resin polyethylene, wanda ya ƙunshi adadin da ya dace na smoothing wakili, don tabbatar da buɗe fim ɗin.
2 guduro barbashi narkewa index (MI) ba zai iya zama ma girma, narkewa index (MI) ne ma girma, da danko na zub da jini guduro ne ma kananan, da aiki kewayon kunkuntar, aiki yanayi ne da wuya a sarrafa, guduro film ne matalauta. ba sauƙin aiwatarwa cikin fim ba;Bugu da kari, index na melting (mi) ya yi yawa sosai, rarraba nauyin kwayar halittar kai tsaye rarraba polymer shi ne matalauta.Saboda haka, ya kamata a zabi narke index (MI) ne kananan, da kuma zumunta kwayoyin nauyi rarraba m guduro albarkatun kasa, don saduwa da yi da bukatun na fim, amma kuma don tabbatar da aiki halaye na guduro.Fim ɗin gyare-gyaren polyethylene gabaɗaya ana amfani dashi a cikin ma'aunin narkewa (MI) tsakanin 2 da 6g/10min polyethylene raw kayan.
Blow gyare-gyaren fim tsari ne wajen kamar haka:
Hopper loading abu plasticizing extrusion → busa gogayya → iska zoben sanyaya → herringlet splint → gogayya yi gogayya → corona magani → iska film winding
Lokacin aikawa: Agusta-15-2022