20mm Food grade PP Wall Sheet Hollow Board corrosion resistance

PP boards, known for their durability, chemical resistance, and versatility, have gained traction in the construction industry as a cost-effective and functional alternative to traditional materials like wood, metal, or glass. In general, this material offers a practical, cost-efficient solution for specific construction needs, particularly where corrosion resistance, lightweight design, and ease of handling are prioritized.

When PP boards (polypropylene boards) are used for building moisture-proofing, they achieve long-term protection through excellent chemical stability and extremely low water absorption. With a dense molecular structure, their water absorption rate at room temperature is only 0.01%-0.03%, far lower than that of wood (12%-18%) and ordinary plastic boards (0.5%-1%). They will not expand or deform due to moisture absorption or water contact, making them suitable for humid environments such as kitchens, bathrooms, and basements. Additionally, PP boards are acid and alkali resistant, salt spray resistant, and have a smooth surface that prevents mold growth, eliminating the need for additional anti-corrosion and anti-mildew treatments and reducing maintenance costs. Meanwhile, with a density of approximately 0.91g/cm³ (only 1/8 that of steel), PP boards are lightweight and can be joined by welding, bonding, or snap-fitting. The joints form a continuous waterproof barrier, avoiding the moisture-proof failure of traditional moisture-proof materials (such as moisture-proof paper and asphalt membranes) caused by joint cracking. Moreover, food-grade PP boards contain no formaldehyde or volatile harmful substances, allowing them to be directly used for moisture-proofing the base layers of interior walls and floors in residences, schools, hospitals, and other spaces with high environmental requirements.​