Which type of ventilators do newer containers generally have?

Newer containers typically utilize plastic ventilators for several reasons. Plastic is lightweight and resistant to corrosion, making it an ideal choice for shipping containers that may face various environmental conditions during transit. Unlike metal, plastic does not rust, which can be a significant advantage for maintaining the container's integrity and appearance over time.

Additionally, plastic ventilators tend to provide adequate airflow without adding excessive weight to the container, which is essential for maintaining the quality of the goods inside, especially when transporting perishable items. Furthermore, modern plastic materials can be designed to meet specific airflow requirements and can be manufactured efficiently, allowing for consistent quality in production.

While older containers may have featured ventilators made of steel, aluminum, or even wood, the trend has shifted towards plastic due to its benefits in durability and functionality in different shipping scenarios. This evolution reflects advancements in materials science and a growing understanding of the requirements for container durability and climate management.