Geometric Configuration
Geometric specification defines the physical shape, height and frequency of the waves in the corrugated medium of a paperboard sheet. Flute profile geometry dictates the vertical compression strength and the cushioning properties of the finished container. Common designations like A, B, C and E flutes refer to standardized dimensions established by the industry.
Dimensions Management
Dimensions are characterized by the take-up factor, which is the ratio of the length of the medium to the length of the finished board. Larger flutes provide excellent vertical stacking strength and insulation but create a coarser surface for printing. Smaller profiles offer a smoother exterior and better resistance to crushing from the side.
Combining different profiles into double-wall board allows for a balance of these performance traits.
Profile Selection
Selection of the profile depends on the weight of the product and the requirements of the retail shelf. High-end graphics usually require the fine surface provided by F or G flutes to minimize the washboarding effect during the printing process. Heavy appliances require the thick walls of A or C flutes to absorb energy during handling.
Precision in the corrugating rolls ensures that the geometry remains consistent across the entire width of the web. Modern converters use laser-measurement systems to verify flute heights during the production run.
