How Biaxially Oriented Polypropylene Film Achieves Excellent Transparency and Gloss?

1. Production process of Biaxially Oriented Polypropylene Film
Biaxially Oriented Polypropylene Film is manufactured through a biaxial stretching process. In the production process, polypropylene resin is first made into a film substrate through co-extrusion technology. The substrate is then stretched longitudinally and transversely so that the film's molecular chains are oriented in both directions. The biaxial stretching process not only significantly enhances the mechanical properties of the film, but also makes the surface of the film smoother, thus improving the gloss and transparency.

During the stretching process, the molecular structure of the film changes, and the polypropylene molecular chains are effectively arranged along the longitudinal and transverse directions. Such molecular orientation helps improve the film's transparency because the arrangement of molecules reduces the scattering of light, allowing more light to penetrate the film, producing a clear visual effect. At the same time, the oriented molecular structure also reduces the internal stress of the film, making the surface of the film smoother and further enhancing its gloss.

2. Molecular structure and transparency
The transparency of Biaxially Oriented Polypropylene Film is mainly affected by its molecular structure. During the biaxial stretching process, the directional arrangement of polypropylene molecular chains gives the film a more uniform structure. This molecular arrangement reduces uneven areas in the film, thereby reducing light scattering and absorption and improving the film's light transmittance. At the same time, since biaxial stretching can increase the crystallinity of the film, the film becomes clearer to a certain extent, allowing the packaging contents to be better displayed.

In addition, the transparency of Biaxially Oriented Polypropylene Film is closely related to its surface flatness. During the production process, the surface of the film is stretched at high temperature, and the molecular chains are elongated and evenly arranged, making the surface of the film smoother. This smooth surface effectively reduces surface roughness, thereby enhancing light reflection, resulting in higher gloss and transparency.

3. Surface treatment and gloss
In addition to the molecular structure and stretching process, the glossiness of Biaxially Oriented Polypropylene Film is also closely related to its surface treatment. During the production process, the surface of the BOPP film can be further processed by coating or corona treatment. Through the application of surface coatings, the smoothness of the film can be enhanced, thereby increasing its reflectivity and thereby increasing gloss.

4. Equipment and technical support
In the production of high-quality Biaxially Oriented Polypropylene Film, the equipment used also plays a vital role. The company is equipped with 6 German Bruckner film production lines. These production lines use advanced technology and precise control systems to ensure that the film achieves precise stretching effects and uniform molecular arrangement during the production process. The German Bruckner production line enjoys a high reputation in the industry, and its excellent performance ensures that the transparency and gloss of BOPP films can always be maintained at a high level.

5. Customized production and application
The transparency and gloss of Biaxially Oriented Polypropylene Film are one of the key factors for its success in the packaging field. Since the company can customize production according to customer needs, including film thickness, width and surface coating, customers can obtain BOPP films that better meet their product packaging needs. Whether used for food packaging, cosmetic packaging, or for labeling and printing, BOPP films can provide ideal visual effects and make products more attractive on the shelf.