The PP hollow sheet is light-weight, high-strength, odorless, pressure-resistant, corrosion-resistant, low-temperature resistant, moisture-proof, waterproof, anti-leakage, shock-proof, sound insulation (cold), heat preservation, and bright colors. It is a recent development new type of hollow board home and abroad, with the advantages of economical and practical, it is an ideal product that replaces wood, steel and paper with plastic. After processing with a special process formula, it can produce plastic hollow boards with properties of anti-static, flame-retardant, anti-ultraviolet, etc.