... the film is extremely thin, biographyheat transfer coefficient, and fast drying. DWF Series belt dryer for the airtight class ... carton board, pulp film, coating, drying, and also applies to the drying of the sheet material and some special materials. StructurePrincipleBelt dryer, ... medicinal herbs, wooden products, plastic products, electronic components aging, curing. Wish to be friends with you!