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.

Unplasticized or uPVC is a rigid, chemically resistant form of PVC (polyvinyl chloride) popular in construction, particularly for window frames and doors. Unlike plasticized PVC, it doesn’t include softening agents, making it more durable and resistant to environmental degradation. uPVC is favored for its low maintenance, as it does not warp, rot, or require painting, and its thermal efficiency, which can lower heating costs. It also boasts excellent sustainability credentials, being recyclable. However, its production and disposal raise environmental concerns due to toxic chemicals potentially released. Despite this, uPVC's benefits make it a commonly chosen material in the eco-friendly building sector.

The cost of 10 feet of PVC pipe can vary significantly depending on factors like diameter, thickness (schedule), and location. As a rough estimate, for standard schedule 40 PVC pipe, prices can range from $5 to $20 for 10 feet. Thinner-walled pipes (schedule 20) might be cheaper, while thicker-walled (schedule 80) will be more expensive. For home improvement and minor irrigation projects, a 1/2 inch to 2-inch diameter pipe is often used, falling somewhere within this price range. Prices are subject to change based on supplier pricing adjustments and regional cost variations. For the most current pricing, it's best to check with local hardware stores or online suppliers.