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 are laminated.



According to the process, the different equipment, co-extrusion composite have co-extrusion tube film method and co-extrusion flat film method two categories.



Co-extrusion tube film method, also known as co-extrusion blown into the film method (or co-extrusion blowing method). This method uses a circular mouth die (circular tube-shaped mouth die) and uses a blowing process to form the film, the product can be a barrel-shaped composite film, when producing large-size products, sometimes also in the film-making process will be cut by the barrel film, in the form of a flat film roll. The main advantage of this method is that the equipment is cheaper and more mobile to replace the product; the product is in the form of a tube, which reduces the middle seam stitching operation when making bags, making bags convenient; the production process does not need to cut the edges, less furnace material, the finished product yield is higher. It is also possible to adjust the performance of the product to a certain extent during the production process by setting and adjusting the blowing ratio, stretching ratio and other process parameters to produce products with a better balance of physical properties in the vertical and horizontal directions or products with large differences in properties in the vertical and horizontal directions.



The fundamental difference between the co-extrusion lamination process and other lamination processes is that it does not involve the preparation of a base film (intermediate product), but rather the production of a multilayer laminated film directly from plastic particles. In today's industrial production, more commonly used in the production of other composite flexible packaging composite process, such as dry stitching, solvent-free composite, etc., must be all composite materials, matters processed into a film-like substrate, and then bonding methods to laminate them together, extrusion, coating and other composite methods, must also be part of the composite material to achieve processing into a film-like substrate. Therefore, co-extrusion compounding has a short process route, less energy consumption, low production costs, environmental protection and a series of outstanding advantages, is generally considered to be a clean production process should be vigorously promoted, so co-extrusion compounding process is one of the first choice of barrier flexible packaging materials production process. The multi-layer co-extrusion high barrier film production line developed by Nanjing Sumino Seiko Machinery Co., Ltd. has the advantages of low cost, high efficacy, environmental protection and safety, and is more popular in the market. www.susumino.com



Nanjing Sumino Precision Machinery Co., Ltd. has professional cast film production lines, the company's main cast film manufacturing lines are: TPU hot melt film production line, CPP/CPE cast film production line, EVA solar encapsulation film production line, PE hygiene breathable film production line, PVDF cast film production line, PP three-dimensional film production line, medical blood purification film production line, multi-layer co-extrusion barrier film production line, LLDPE winding film production line, etc.