The four major problems that occur when printing BOPP film

1. Adhesive edges and film breakage.

BOPP film is known for its relatively low tear resistance, which makes it vulnerable to damage during production and transportation. Any damage to the cross-section can lead to adhesive edges or even film breakage. To prevent this, careful handling and proper packaging are essential throughout the entire supply chain. This ensures that the film remains intact and maintains its quality for end-use applications.

2. Poor print color quality.

During the biaxial stretching process, if the local thickness of BOPP is not properly controlled, it can result in a "lotus edge" effect. This unevenness can cause misalignment of the mark line during printing, leading to poor registration and overprint issues. As a result, the printed image may appear blurred or distorted, affecting the overall visual appeal and quality of the final product.

3. Low corona treatment value on the substrate surface.

To ensure good adhesion of inks and strong peel strength after lamination, the surface of BOPP must undergo corona treatment. The surface tension should be above 38 dyne. If the corona value is too low, the ink may not adhere properly, leading to smudging or peeling. In such cases, the film is unsuitable for printing or laminating and should be rejected to avoid quality issues.

4. Poor antistatic performance.

BOPP films tend to accumulate static electricity easily, especially in dry environments. This static charge can cause problems during the printing process, such as "lost spots," "burrs," and "empty edges" in the printed image. These defects not only affect the appearance but also reduce the overall quality and reliability of the printed material. To mitigate this, anti-static agents or ionizers are often used during production and printing to control static buildup and improve print consistency.