Film blowing machine 1.HDPE, LDPE, LLDPE, EVA plastic ... products, and daily necessities.2.Features: (a)adopt cylinder filtering-net device. (b) Center filling with spiral ... to the lies, such as length counting device, vertical cutting device, and film spreading roller. (d)high ... refining;HB260~290,nitrogen treatment on the surface.Cylinder: 38CrMoALA, thermal refining;HB260~290,nitrogen treatment on ...