1. Polypropylene Corrugated Sheet
Polypropylene Corrugated Sheet is produced by melted PP and hot pressed. There are upper wall and lower wall, and partition in between. It resists compression, and is impact-proof, water/grease-proof, and heat resistant. It applies multi-color, weighs light but born heavy. PP is hydrocarbon, there’s no toxic when burns, suitable for recycle and conform to environmental perseverance.
 2. Special sheet/ABA sheet
There are three parts of Polypropylene Corrugated Sheet: upper wall, partition and lower wall. The traditional production cannot use different material for the three parts. After improvement, the new technology can divide the sheet into three parts, using different material or additives, thus, produce A-B-A or A-B-C sheet.