Other technology of CO extrusion packaging film

(1) The heat seal layer and the composite layer are divided into two groups, one group uses the more suitable price polymer to replace the higher price polymer, so as to reduce the cost of the film and maintain the strength of the film. The other group uses functional polymers that meet their functional requirements. The concept of multilayer is used to make more economical composite films. For example, comparing two kinds of 1KB thin films, the material cost of five layer structure film is higher than that of seven layer structure film in 1990.

 

 

Co extrusion packaging film

 

 

 

(2) The properties of PA coextruded films with more layers can be improved. For example, the use of an additional adhesive layer can improve the barrier performance of the film by increasing the water vapor barrier effect of the film. At the same time, another advantage of the film is that it can make the film softer, feel better and have good crack resistance.

 

 

 

(3) The stress warping resistance of PA coextruded films with more layers can be improved. At the same time, it can meet the needs of secondary processing such as bag making.

 

 

 

(4) It integrates other functions of dry-type composite film except inner printing, making the composite process simple, composite structure more flexible, functions more diversified, cost significantly reduced, more safety, more in line with the requirements of health and environmental protection, social and economic benefits are more significant. With the continuous progress of high molecular synthesis technology, new polymers with unique physical and mechanical properties can be widely used Widely used to meet the needs of packaging. The function and structure of multilayer coextrusion composite substrate film will be more flexible and economical. Through the application and improvement of molding equipment and technology, combined with the unique and effective design of composite structure, the pursuit and thinking mode of film manufacturers on the diversification of packaging functions, rationalization of packaging structure and maximization of packaging benefits will have a revolutionary role.