The birth of printed film: a gorgeous transformation in the extruder

In the production journey of printed film, there is a particularly critical and magical link, that is, the gorgeous transformation of resin particles in the extruder. This process is not only a perfect fusion of science and technology, but also a vivid display of the charm of materials science.

As the core equipment on the printed film production line, the extruder has a complex and precise internal structure and is the key to completing the transformation from resin particles to film. From the moment the dried resin particles are fed into the extruder, a wonderful chemical and physical change begins.

Inside the extruder, high temperature and pressure become the catalyst for this transformation. As the screw rotates, the resin particles are gradually pushed to the heating zone. Here, the high temperature makes the molecular chains of the resin particles become active, the attraction between them weakens, and the particles gradually soften and melt into a viscous fluid. At the same time, the high pressure environment inside the extruder ensures the stability and continuity of the fluid during the transmission process.

The molten fluid moves slowly along the predetermined path under the push of the extruder screw. The ingenious design of the screw not only ensures the uniform flow of the fluid, but also further promotes the plasticization and mixing of the resin through shearing. As the fluid continues to move forward, it finally reaches the entrance of the mold.

As a key component that determines the shape and size of the film, the mold has a sophisticated and complex internal structure. When the molten fluid flows through the mold, the fine shaping effect of the mold begins to appear. Under the guidance of the mold, the fluid is evenly extruded and stretched into a continuous film. In this process, the thickness, width and surface finish of the film are precisely controlled.

As the molten fluid completely passes through the mold and is cooled and solidified, a continuous, flat and strong film is born. At this moment, the resin particles have completed a gorgeous transformation from solid to liquid and then to solid. They are no longer the scattered particles, but have become smooth, soft and tough printed film prototypes.

These nascent printed film prototypes will be sent to the warehouse for further processing or directly applied to various fields after subsequent traction, cutting, winding and other processes. Whether it is food packaging, pharmaceutical packaging or advertising materials production, printed films have won the favor of the market with their unique performance and broad application prospects.

With the continuous advancement of science and technology and the increasing requirements of people for environmental protection and sustainability, the production process of printed films is also constantly innovating and optimizing. In the future, we have reason to believe that printed films will show their unique charm and value in more fields and bring more convenience and beauty to human life.