The production process of PVC decorative film mainly includes the following steps:
Raw Material Preparation: Based on product performance requirements, select qualified PVC resin, plasticizer, stabilizer, pigments, and other raw materials. These raw materials need to be pre-treated to ensure they are dry and clean, preventing moisture, contamination, and cross-contamination.
Ingredient Batching and Mixing: Accurately weigh all raw materials according to the formula ratio and mix them thoroughly in a mixer to ensure consistent component distribution. During batching and mixing, temperature and time must be carefully controlled to avoid clumping or uneven mixing.
Melt Extrusion: The mixed PVC material is fed into an extruder for melt extrusion under high temperature and pressure. The temperature and pressure inside the extruder need to be adjusted according to different PVC formulas to ensure the material is fully melted and uniformly mixed. During melt extrusion, the quality and flow rate of the material need to be controlled to ensure the normal operation of subsequent processes.
Calendar and Cooling: The melt-extruded PVC material is processed by a calender to form a film. During calendering, parameters such as temperature, speed, and tension need to be controlled to ensure the thickness and uniformity of the film. Meanwhile, to prevent the film from deforming or sticking at high temperatures, a cooling process is required to quickly set the film's shape.
Traction and Winding: After calendering and cooling, the PVC film needs to be drawn and wound for subsequent processing and use. During the drawing process, speed and tension must be carefully controlled to ensure the flatness and uniformity of the film.
Surface Treatment: The film surface is cleaned and sanded to improve adhesion and printability. If needed, a transparent or printed coating can be applied to enhance the decorative effect and protective properties.
Inspection and Packaging: The produced PVC decorative film undergoes quality inspection, including checks on thickness, width, length, and appearance. Qualified products are packaged for storage and transportation.
