PP hollow board for double-wall, in the middle stud support section to form a rectangular or square lattice, stud was parallel structure, it said hollow board, is a new type of environmentally friendly packaging materials, use process does not produce dust, and the use of long life, recyclable, there is a gradual trend instead of paper corrugated board, plastic hollow board less supplies, low cost, light weight, the processing of hollow boxes, anti-static turnover box, plastic box, etc. use at all industry.