Qingdao Tongsan Plastic Machinery co.,;td have been develop the PP hollow corrugated sheet making machine since 2015,now we have the machines for the PP hollow grid plate  width from 1220 mm to 2450 mm and thickness from 1.5 mm to 12 mm.We have different model production line,such as the 1400 type PP hollow sheet extrusion machine,1860 type PP corrugated sheet production line,2300 type PP hollow corrugated board making machine,2600 type plastic hollow grid panel making machine,and for each model,we have the co-extrusion type for customer choose.The co-extrusion type can use 20%-60% filler match for reduce the cost,so our customer can product the cost competitiveness sheet with good quality.Our machine have the advantage of high output,easy operation,high precision,good products with smooth surface straight rib.