Joint squeezing die head, parameter of flow path, excellent design by computer applies to joint squeezing and compound for various materials. Die head and cooling wind ring rotate and rolling up of film are even and smooth. Change of package, applying to blow film with different specifications. Always fitting various functional parts on the spot, such as corona treating machine, device of drawing side in and so on . Suitable raw materials: ldpe, hepe, lldpe, eva, polymer of pp ion body. Suitable film blowing structure 16t