Aluminum is often chosen for its lightweight nature and good thermal conductivity. This means that aluminum PET moulds can achieve uniform temperature distribution, which is important during the injection process. The quick cooling of PET moulds made from aluminum can cause faster production cycles. However, while aluminum is cost-effective and easy to machine, it may not provide the same longevity as steel moulds, especially under conditions of heavy use. This can affect the production of pet food containers, where consistency and durability are key for maintaining food safety.