Final answer:
Polyethylene is not recommended for EO sterilization because it has a low gas permeability compared to materials like Tyvek, polyester, and polypropylene that are suitable for the sterilization process.
Step-by-step explanation:
The packaging material that is NOT recommended for ethylene oxide (EO) sterilization among the options provided is polyethylene. EO sterilization requires materials that are permeable to gas and moisture. Polyethylene is commonly used in products such as plastic bags, bottles, toys, and piping, but it has a low gas permeability making it unsuitable for EO sterilization processes. In contrast, materials like Tyvek®, polyester, and polypropylene are more suitable because they allow EO gas to penetrate and exit, ensuring proper sterilization of the contents.