The white pp hollow board is a new type of material that is widely used by extrusion molding. They are waterproof, moisture-proof, corrosion-resistant, and UV-resistant. Through corona treatment, the surface dyne value can reach 60, which enhances the surface adhesion. It has a longer service life outdoors and longer-lasting printed content. It is a common and widely used advertising material on the market. Especially European and American countries use more. Such as courtyards, parties, yard signs, decorations, road signs, election cards, Real estate signs, various types of publicity boards and so on.