Shock absorption and vibration damping, lightweight and portable, easy to process and shape, surface-friendly, and safe.

Sponge cardboard (also known as foam cardboard or sponge paper card) is a three-layer composite material: the outer layer consists of paper (providing a surface suitable for writing and printing), while the middle layer is a foam core, bonded together with environmentally friendly adhesive. This structure combines the ease of processing offered by paper with the cushioning properties of foam. Its key characteristics are as follows: Cushioning and shock absorption + lightweight and portable: The foam core delivers excellent cushioning by dispersing impact forces. It is lighter than traditional foam or cardboard, making it ideal for packaging fragile items such as glass and electronics, thereby reducing shipping costs. Additionally, its clean-cut edges prevent scratches on packaged goods. Easy to process and shape: can be cut by hand, scissors, or die-cutting machines; complex shapes (such as petals and 3D models) are achieved without tearing. Maintains shape well after embossing or layering. Supports customization of matte, glossy, and textured finishes. The outer paper layer is printable and writable.