10. Aluminum strengthen Jiangsu Jiangsu import and export turnover box hollow board hoardings retardant hollow board hollow board hoarding box PP hollow board is the use of environmentally friendly synthetic raw materials, extrusion and compression molding made of plastic sheet, with tasteless, anti-moisture, corrosion resistance, light weight, look gorgeous, rich and pure color, and has a bending, anti-aging, tensile, compressive and tear strength properties, according to user needs to produce a thickness of 2-8mm, width ≤2000mm the length of any given ordinary hollow sheet, anti-static hollow plate, hollow conductive plate and flame hollow sheet