Analysis of temperature sensitivity of PVC film
PVC film is a thermoplastic material, which means that its physical state changes with temperature. Specifically, PVC molecular chains show high activity within a certain temperature range, which makes the film easy to shape during processing, but also means that the temperature must be carefully controlled during storage to prevent unnecessary morphological changes.

Risks in high temperature environment: When PVC film is exposed to an environment higher than the recommended storage temperature, the molecular chain activity intensifies, causing the film to soften. Long-term high temperature exposure may even cause the film to deform or even melt, which not only destroys the appearance and structural integrity of the film, but also seriously weakens its physical properties such as tensile strength, tear strength and weather resistance. In addition, high temperature may accelerate the migration and volatilization of additives in PVC (such as plasticizers and stabilizers), further shortening the service life of the film.
Challenges in low temperature environment: In contrast to high temperature, too low storage temperature will slow down the activity of PVC molecular chains, causing the film to become brittle and hard. This embrittlement phenomenon makes the film more prone to cracking, especially when subjected to external forces. Low temperature storage may also cause the accumulation of internal stress in the film. Once the temperature rises, the release of these stresses may cause cracks or deformation on the surface of the film, affecting its application effect.
Ideal storage temperature range
Given the sensitivity of PVC film to temperature, it is crucial to ensure that it is stored under suitable temperature conditions. Generally speaking, the ideal storage temperature should be maintained at around 20°C, which is a temperature point at which the performance of PVC film is relatively stable. In actual operation, it is best not to let the storage temperature exceed 30°C, because even short-term high temperature exposure may cause irreversible damage to the film. At the same time, in order to maximize the service life of the film and maintain its optimal performance, the storage temperature should be kept below 25°C.

Storage practice recommendations
Temperature monitoring: Install temperature sensors in the warehouse or space where PVC film is stored, and check and record them regularly to ensure that the temperature is always maintained within the recommended range.
Ventilation and humidity control: In addition to temperature, humidity is also an important factor affecting the storage quality of PVC film. Maintain proper ventilation to avoid excessive humidity that causes the film to become damp and moldy or promotes microbial growth.
Packaging and isolation: Use moisture-proof and dust-proof packaging materials to seal the film to reduce the direct impact of external environmental factors (such as temperature changes and ultraviolet radiation). At the same time, different batches of film should be properly isolated to avoid damage caused by mutual squeezing.
Regular inspection: Regularly inspect the stored PVC film to promptly detect and handle any abnormal conditions, such as damaged packaging, abnormal temperature fluctuations, etc.
Training and education: Provide professional training to personnel responsible for film storage management to improve their temperature control awareness and emergency response capabilities.