As an important coating equipment, the film coating machine plays a key role in the production of BOPP (biaxially oriented polypropylene film). This article will discuss the material property changes during the BOPP coating process, especially the performance research on BOPP-AR (acrylic resin) composite materials, and introduce the application of film coating machines in the coating process.
1. Surface morphology of BOPP-AR composite materials
There may be surface cracks in BOPP-AR composite materials. This is mainly due to the fact that the ARs are close to each other during the evaporation of water. Due to the different shrinkage forces with the BOPP surface, internal stress is generated inside the AR and cracks appear on the surface. To solve this problem, T-CNP (nanocellulose) was introduced as an additive. It was observed that the cracks disappeared and the surface was smooth, indicating that the addition of T-CNP improved the surface morphology.
2. Research on the performance and mechanism of composite materials
Through research on the BOPP-T-MCC/AR composite material, it was found that the surface of the composite material was closely combined with the T-MCC/AR composite material after corona treatment. Observation of the cross-sectional view shows that during the evaporation of water in the composite material, AR molecules and T-MCC are close to each other, forming a relatively dense and uniform film, which increases the surface energy.
3. Application of film coating machine in coating process
As a device for preparing films of different thicknesses, the wire rod coating machine can coat the film by winding the gaps between stainless steel wires of different diameters on a steel rod of a certain diameter. During the coating process, the coating material must have good fluidity and leveling properties to ensure that it can be quickly filled and fully leveled when the wire rod slides, forming a smooth and continuous film with uniform thickness.
The coating machine plays a vital role in the BOPP coating process. Through the introduction of additives, such as T-CNP, the surface morphology of the composite material can be improved and its performance can be improved. As a flexible coating equipment, the wire Bar Coater is suitable for the preparation of films of different thicknesses and has significant advantages in improving production efficiency. An in-depth study of material property changes during the coating process will help to better understand the application of Film Applicators and their impact on composite material properties.
