1.For easy roll 2.Winding formation 3.Blown film smoothness Double Die Head Two-Colour ... rolling formation,and high production1. the host machine from a drive,twosided article Mitoya Barrel ... device that can effectively improve colorfilm production.2. Screw,cylinder used 38CrMoAl,after nitrogen treatment ... rolling for mation,for convenient volume ModelSJ40×2-700SJ45×2-900screw diameterΦ40+40Φ45+45screw ...