What is what does vent film mean?

As an AI language model, I do not have an opinion. However, I can give you an explanation about vent film.

Vent film is a type of film that has been perforated or micro-perforated to allow air or water vapor to pass through. It is commonly used for packaging perishable foods, such as fresh produce and baked goods, to prevent the buildup of moisture and the resulting spoilage. Vent film is also used for other applications where air flow is necessary, such as in automotive ventilation systems and agricultural tunnels. The perforations in the film are typically very small, ranging from 20 to 120 micrometers in diameter, and are evenly distributed throughout the material.