PVC pipes, made from polyvinyl chloride, are a versatile and widely used type of plastic piping. Their popularity stems from their durability, resistance to corrosion and chemicals, low cost, and ease of installation. PVC pipes are primarily used for transporting water and wastewater in residential, commercial, and industrial settings. They come in various sizes and strengths, designated by different schedules that relate to wall thickness. Due to their non-biodegradable nature, there's growing interest in recycling and more sustainable alternatives in the industry. Nonetheless, their efficiency in plumbing, irrigation, and construction applications makes them an indispensable part of modern infrastructure.

An alternative to polypropylene, widely used in various industries due to its versatility and recyclability, is Polylactic Acid (PLA). PLA is derived from renewable resources like corn starch or sugar cane, making it biodegradable and an environmentally friendly option. This bioplastic is popular in packaging, disposable tableware, and even 3D printing. Although its thermal resistance and strength are generally lower than polypropylene, advancements in compounding PLA with other materials are improving its properties. For applications where biodegradability and the use of renewable resources are priorities, PLA represents a promising alternative. However, its suitability varies depending on the specific requirements of the application, like heat resistance or structural strength, so its adoption should be considered accordingly.

Polypropylene is known for its low surface energy, making it challenging for ordinary paints to adhere. For optimal results, use paints specifically formulated for plastics or polypropylene surfaces. These are usually solvent-based or acrylic-based paints that can bond better with polypropylene. A critical step before painting is to prime the surface with a primer designed for plastics. This helps in creating an adhesive layer for the paint to stick to. Brands like Krylon and Rust-Oleum offer spray paints and primers suitable for polypropylene and other plastics, ensuring durability and a smooth finish. Always follow the instructions for best results and consider testing on a small area first.