Technology Characteristics of multi-layer co extruded barrier film

Multi layer co extrusion barrier film is generally produced using a multi-layer co extrusion blow molding process or tape casting process. Multi layer co extrusion has excellent barrier performance, mechanical properties, tensile forming performance, and heat sealing performance, and does not require additional compounding during the processing, nor does it involve printing ink, adhesives, and additive residues. Therefore, it is a relatively green and environmentally friendly technology Cost advantages in food packaging technology and processes.

Multi layer co extrusion barrier film refers to the process of using more than three extruders to melt and extrude resin raw materials with different functions, such as polyethylene, polypropylene, nylon, ethylene vinyl alcohol copolymer, etc., and then converging at the multi layer co extrusion die head through their respective flow channels. After being blown or cast into a mold, the film is cooled and compounded together to obtain a multi layer co extrusion film. This method combines and designs the advantages of different resins to produce films with comprehensive performance and meet different packaging needs.

Characteristics of multi-layer co extruded barrier film

Advantages of concentrating multiple materials

The multi-layer co extruded barrier film structure can combine materials with different properties according to needs, making it have multiple properties at the same time. For example, for heat sealing and packaging machinery, if the film needs to have good mechanical processing performance, MDPE or HDPE materials are used in multi-layer structures to improve the strength and stiffness of the film, ensuring good mechanical processing performance. On the inner layer, metallocene (HAO) polyethylene materials with good heat sealing performance are used to make the film have good heat sealing performance and mechanical performance, better meeting packaging needs, In order to meet different barrier needs, PA, EVOH, PVDC, etc. can be selected to meet different barrier needs of the film.

cost control

The multi-layer co extrusion barrier film technology is a one-step forming process for multi-layer co extrusion, which does not require traditional post-processing processes such as composite and coating. It can effectively reduce raw material costs and production processes, not only saving production costs, but also achieving the feasibility of thinning in film thickness control.

Thin film structure adjustment can be achieved as needed

Produce various structures of film, suitable for different packaging needs. Through structural design, various materials are combined in different combinations to fully utilize the characteristics of different raw materials. Different structural layer designs can also be carried out according to the needs of different packaging purposes. Moreover, the more co extruded layers there are, the more flexible the structure can be designed. Currently, the multi-layer co extruded film structure that has been applied in the market has reached a maximum of 11 layers.

Due to the flexible design of multi-layer co extrusion structure, high barrier film, medium barrier film, and low barrier film processing can be achieved. We also produce barrier films of different colors based on the placement of different color masterbatches.

Wide range of use

Multi layer co extruded film materials are suitable for all soft packaging fields. Including food, daily chemicals, beverages, pharmaceuticals, electronic products, protective films, etc.