Collapsible Corrugated Plastic Box is made of polypropylene (PP) corrugated plastic. 
Collapsible Corrugated Plastic Box is a brand name of corrugated plastic.Collapsible Corrugated Plastic Box is extruded,twinwall,fluted polypropylene that can have a wide variety of additives to make it suitable for specific purposes, options include a flame retardant, UV resistant,and Anti-Static additives.As colour is added to the base polymer any variation of color can be produced.Fully recyclable,chemically inert with a neutral PH corrugated plastic sheet is resistant to most oils, solvents and water making it ideal for a wide range of uses. 
http://www.cartonplastic.com