Polyvinyl chloride (PVC) is a widely used plastic, familiar for its application in products like pipes, cables, and flooring. Concerns about its carcinogenicity mainly relate to its production and disposal process rather than the PVC material itself. During manufacturing and incineration, PVC can release dioxins, which are potent carcinogens. Additionally, plasticizers like phthalates, added to make PVC flexible, have been under scrutiny for their potential health impacts. However, the finished PVC product in its stable form generally poses minimal risk in everyday use. Regulatory bodies monitor and regulate the levels of these additives to ensure safety. While direct evidence of PVC causing cancer in humans through contact or use is limited, it's crucial to handle PVC waste responsibly to minimize environmental and health risks.

Diapers are typically made from a combination of polyethylene and polypropylene. Polyethylene is often used in the outer lining of the diaper to provide a liquid-resistant barrier, ensuring that moisture is retained within the diaper and does not leak out. On the other hand, polypropylene is commonly used in the inner layer that touches the baby's skin because of its soft texture and its ability to wick moisture away from the skin, helping to keep the area dry and comfortable. Additionally, these materials are chosen for their durability and flexibility, ensuring the diaper can withstand movement without breaking or losing shape. Given the need for diapers to be both absorbent and skin-friendly, manufacturers utilize the unique properties of both polyethylene and polypropylene to meet these requirements effectively.