... G Series Three layer Co-extrusion Rotary Die Film Blowing Machine,three layer rotary die film blowing machine.film blowing Name:3SJ-G ... in the thickness ackaging films, film has goog insulation,for instance holding temperature,antihumid,antivreeze,antivreeze,anti-raim,anti- ... insulation oxygen,oil trsistive,and so used for light and heavy-duty packaging,for example fresh fruits,meat-feeding ,salt ...