There are two key reasons why PVC foam boards are widely used in the building materials industry:

　　First, PVC boasts four unique properties: water resistance, fire resistance, antistatic performance, and ease of molding. Second, PVC is characterized by low capital investment and high production output. So why does PVC possess these two major advantages? Let’s turn to its manufacturing process to find the answer, as explained by a PVC foam board manufacturer.

　　Exceptional performance

　　How does PVC film differ from ordinary adhesive film? Ordinary adhesive film is applied directly to the surface of the board using glue at room temperature, so after one or two years it tends to peel off. In contrast, PVC film is bonded to the board’s surface under high temperature—typically around 110°C—using a specialized vacuum laminating machine, making it much more resistant to peeling.

　　Although PVC film for trailer covers boasts excellent quality assurance, some may argue that, as a chemical product, PVC cannot compare with natural materials: it inevitably carries toxicity and off-odors and can still harm the environment. In fact, this is not the case. German-produced PVC film is made from specially refined raw materials in which all harmful substances have been completely removed; consequently, PVC is entirely non-toxic and odorless, posing no irritation to human skin or respiratory system. For individuals allergic to wood or paint, furniture and kitchenware packaged with PVC film are highly suitable. By using PVC film as a decorative covering, manufacturers can significantly increase their use of medium-density fiberboard, particleboard, plywood, and fiberboard while reducing the amount of solid wood required, thereby lessening deforestation and environmental damage. From this perspective, PVC film makes a substantial contribution to ecological conservation.

　　The use of PVC foam boards once sparked considerable controversy in Western countries, with many seeking to replace PVC with various alternative materials. However, it has since been proven that PVC’s performance is in no way inferior to these alternatives, while its cost is lower. Experts’ research has shown that, in many industries, abandoning PVC would entail substantial additional expenses—specifically, billions of Deutsche marks in extra costs. For individual consumers, this would translate into a significant financial burden. Take windows with PVC as the surface material, for example: if such windows were instead made with ordinary wood, the mere costs of cleaning and maintenance would skyrocket. In a small town in the United Kingdom, where wooden windows have been used for the past two decades, a study was conducted on the cleaning and maintenance expenses of these windows and compared them with those of PVC windows. The results revealed that the cleaning costs for ordinary wooden windows are twice as high as those for PVC windows.

　　Strict processes

　　The production process for PVC is not complicated; a typical production line generally consists of a calender, a printing unit, a back-coating machine, and a cutting unit. The core operation involves direct agitation by the calender, rotation of the rollers, and high-temperature calendaring to produce a film only 0.3 to 0.7 mm thick. Simultaneously, the printing unit applies decorative patterns to the front surface of the film, while the back-coating machine applies a layer of backing coating to the reverse side. This backing coating should not be underestimated—it is a critical factor in ensuring the superior performance of PVC film. Made from special materials, it functions as a high-energy adhesion promoter; thanks to this coating, the PVC film adheres tightly to medium-density fiberboard or other substrates, remaining bonded for ten to fifteen years without delamination. By contrast, the primary challenge with conventional laminated films is their tendency to peel off. Moreover, because the entire manufacturing process for electric bicycles is carried out at elevated temperatures—up to 220°C inside the calender—the resulting PVC film exhibits excellent light resistance and fire retardancy, further guaranteeing its high quality. Of course, this places stringent demands on the production equipment; a complete production line typically costs around 39 million Deutsche marks, equivalent to approximately RMB 160 million. On the other hand, the PVC film production process itself is relatively simple, and the machinery boasts high throughput. Thus, viewed holistically, PVC is essentially a low-investment, high-yield product.