It can produce h-type and m-type hollow boards with thickness of 1.2mm-- 13mm and maximum width of 2500mm,as well as hollow boards with special  functions such as degradable,anti-static, conductive, flame retardant and aging resistance. In many fields, it can be used as a substitute for cardboard, wood, density board and metal plate, and has the characteristics of waterproof, moisture-proof, corrosion resistance and bending resistance.It has incomparable advantages.