What is Coroplast Made Of? The Science Behind PP Corrugated Plastic

When selecting materials for your business, understanding the composition of your substrates is key. Coroplast is a high-quality corrugated plastic manufactured from Polypropylene (PP) resin. As a thermoplastic polymer, it is 100% recyclable, making it an eco-friendly and sustainable choice for temporary signage and industrial packaging.

The Manufacturing Process

During the extrusion process, the PP resin is melted and formed into a continuous board featuring a hollow, fluted interior. This "twin-wall" structure provides an exceptional strength-to-weight ratio, ensuring the material is both lightweight and remarkably durable.

The Science of High-Quality Signage

Not all corrugated plastic sheets are created equal. To ensure premium performance and longevity, professional-grade Coroplast incorporates two critical enhancements:

• UV Stabilizers: These chemical additives protect the board from degradation caused by solar radiation, preventing the plastic from becoming brittle or yellowing over time.

• Corona Treatment: This essential surface modification increases the "surface energy" (measured in dynes) of the plastic. Without proper Corona treatment, inks and adhesives would fail to bond, causing your graphics to peel or flake off.

Why Choose Our Material?

Our factory specializes in high-dyne Coroplast materials, engineered specifically for high-speed UV digital and screen printing. By mastering the science of Polypropylene, we ensure that every sheet provides a superior canvas for your industrial and advertising applications.