Co-extrusion tubular film co-extrusion flat film film

The co-based barrier composite film refers to the barrier film produced by the co-extrusion composite process. The co-extrusion composite process is to put two or more different plastics through two or more extruders, respectively melt and plasticize the various plastics, and feed them into a pair of die heads. Paper cup composite film a molding method.

According to different processes and equipment, there are two types of co-extrusion compounding: co-extrusion tubular film method and co-extrusion flat film method.

Co-extrusion tube film method, also known as co-extrusion blown film forming method (or co-extrusion inflation method). This method uses an annular die (circular die) and adopts the blown film forming process to form a film. The product can be a cylindrical composite film. When producing large-scale products, sometimes the cylindrical film After being cut, it is rolled up in the shape of a flat film. The main advantages of this method are that the price of equipment is relatively cheap, and the mobility of product replacement is strong; the product is cylindrical, and the seam stitching operation can be reduced during bag making, which is convenient for bag making; there is no need for edge trimming during the production process, and the finished product The yield is higher. It is also possible to adjust the performance of the product to a certain extent through the setting and adjustment of process parameters such as inflation ratio and stretch ratio during the production process, so as to obtain better physical properties in the longitudinal and transverse directions or longitudinal, Products with large differences in performance in the horizontal direction.

The fundamental difference between the co-extrusion composite process and other composite processes is that it does not prepare the base film (intermediate product), and directly produces a multilayer composite film from plastic particles. In today's industrial production, other commonly used composite processes for producing composite flexible packaging, such as dry suture, solvent-free composite, etc., must process all composite materials and items into film-like substrates, and then glue them together. Laying together, extrusion, coating and other composite methods must also process part of the composite material into a film-like substrate. Therefore, co-extrusion compounding has a series of outstanding advantages such as short process route, low energy consumption, low production cost, and strong environmental adaptability. It is generally considered to be a clean production process that should be vigorously promoted. Therefore, co-extrusion The composite process is one of the preferred processes for the production of barrier flexible packaging materials. 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 efficiency, environmental protection and safety, and is more popular in the market. www.susumino.com Multi-layer co-extrusion high barrier film equipment.

Nanjing Sumino Precision Machinery Co., Ltd. has a professional cast film production line. The company's main cast film production lines include: TPU hot melt adhesive film production line, CPP/CPE cast film production line, EVA solar energy packaging film production line, PE hygienic and breathable Film production line, PVDF cast film production line, PP three-dimensional film production line, medical blood purification film production line, multi-layer co-extruded barrier film production line, LLDPE stretch film production line, etc.