All films made from thermoplastics share a common problem: special production techniques must be used to achieve a uniform thickness. Unlike extruded tubes and sheets, extruded films can have large variations in thickness if special steps are not used. Even now, the quality of the films produced in

With the rapid development of the plastics industry, plastics machinery has also evolved significantly, and at the same time, there are various plastic film preparation processes followed by continuous upgrading, today to understand the development process of co-extrusion class barrier composite fil

1. Shrinkage phenomenonThe viscoelastic behaviour of the polymer melt when the film is calendered with a T-die head causes(i) problems such as the shrinkage phenomenon, where the width of the film narrows;② the problem of stretchability of the film, which is the phenomenon of material surging or bre

Plastic film, especially BOPP and other biaxially oriented film, there is an obvious molecular orientation, in a state of stress concentration, when there is no cut, it is difficult to tear, but once there is a cut, it can be more convenient to tear, so a large number of applications in the market,

Co-base barrier laminate films are barrier films produced by a co-extrusion lamination process. The co-extrusion lamination process is a molding method in which two or more different plastics are molten and plasticized by two or more extruders, respectively, into a pair of dies, and the paper cups a