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There are several potential problems that can be encountered when using PVC film for panel:

Adhesion Issues: PVC film can have issues with adhesion, which can cause the film to peel or bubble up over time. This can occur due to improper surface preparation or insufficient bonding between the film and the substrate.

UV Degradation: PVC film can degrade over time when exposed to ultraviolet (UV) light, which can cause the film to yellow or become brittle. This is especially problematic in outdoor applications where the film is exposed to sunlight.

Temperature Sensitivity: PVC film can be sensitive to temperature changes, which can cause the film to expand or contract. This can lead to issues with wrinkling or delamination if the film is not properly installed or if the substrate is not stable enough.

Environmental Concerns: PVC film is made from a plastic material that can be harmful to the environment if not properly disposed of. Additionally, the manufacturing process for PVC can produce toxic byproducts that can be harmful to human health and the environment.

Fire Hazard: PVC film is a highly flammable material that can ignite easily and release toxic fumes when burned. This can be a safety concern in applications where the film is used in close proximity to heat sources or flames.

Overall, the use of PVC film for panel can be problematic due to issues with adhesion, UV degradation, temperature sensitivity, environmental concerns, and fire hazard. It is important to carefully consider these potential issues and take appropriate measures to minimize their impact when using PVC film in panel applications.