Structural foam is a type of plastic molding process that creates a product with a cellular structure. This means that the final product has a series of small, interconnected air pockets within it, which helps to reduce the weight of the product while maintaining its strength and durability. Structural foam molding is commonly used to create large parts or components, such as automotive parts, furniture, and appliances. The process involves injecting a molten plastic material mixed with a foaming agent into a mold, where it solidifies and cools into the desired shape. The resulting product has a high strength-to-weight ratio, making it an attractive option for applications where both strength and weight are important factors.