Introduction of PVC protective film calendered biaxially oriented film
Oct 24, 2022
In the production of PVC calendered biaxially oriented film, defects such as excessive shrinkage, uneven film thickness, and many perforations are often encountered. How to overcome the above defects is the key to ensure product quality, reduce production costs and improve the competitiveness of enterprises. Several problems and corresponding countermeasures that should be paid attention to in the production of calendered biaxially oriented film are introduced.
The PVC calendering process remains the best and most economical process for film production, and recent developments in this field have greatly expanded its range of applications. Various PVC films are still the most popular products, such as geomembrane, greenhouse film, light box film, water bed film, grain fumigation film. Although biaxially oriented film is mainly produced on a large scale with imported production lines, its production technology, that is, biaxially oriented film technology, China has independent intellectual property rights. In other words, the Chinese are using their own technology and using imported production lines to produce various biaxially oriented film products. Since the production lines introduced by various manufacturers are different, and the products are also different, the methods for solving product quality problems are also different. The difference between the production of calendered biaxially oriented film and the production of ordinary calendered film lies in the subsequent biaxial stretching process. Therefore, the requirements for the environment, the formulation of materials, and the control of the process are very different.
