High-Burst Strength Core Board for Mailing Tubes
Uncoated paperboard exceeding 225 g/m² with superior burst resistance, supplied in rolls for spirally winding into protective mailing tubes. It fits HTS 4805.93.40.50 as dedicated tube and core board, not further worked beyond note 3 specs.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sack kraft specs met (60-115 g/m², burst index >=3.7)
Lighter weight and specific tensile/tear minima classify it as sack kraft, outside heavy core board.
If semichemical fluting with >=65% unbleached hardwood and CMT crush >1.8 N/g/m²
Corrugating medium specs take precedence if pulping process and crush resistance qualify.
If made from vegetable fibers like straw with CMT 30 >1.4 N/g/m² at >=130 g/m²
Straw pulp-based fluting paper under 4805.12 if meets crush test, diverging from generic core board.
Not sure which classification is right?
Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.
Import Tips & Compliance
• Include Mullen burst test results to prove suitability for tubes; ensure declaration specifies 'tube/core board' not generic; check for import quotas on certain paperboard
Related Products under HTS 4805.93.40.50
Kraft Tube Board for Paper Towel Cores
Uncoated kraft paperboard weighing over 225 g/m², specifically designed for manufacturing the cardboard cores inside paper towel rolls. It meets tube and core board specifications under HTS 4805.93.40.50 due to its high strength and suitability for winding into rigid cylindrical cores without further processing.
Recycled Coreboard for Toilet Paper Tubes
High-density recycled paperboard over 225 g/m², uncoated and in sheets or rolls, optimized for forming strong toilet paper inner cores. Classified under HTS 4805.93.40.50 as tube and core board due to its structural properties for core manufacturing without additional processing.
Chipboard for Yarn Bobbin Cores
Dense uncoated chipboard over 225 g/m² in sheets, used for producing rigid cores in textile yarn bobbins. HTS 4805.93.40.50 covers this as tube and core board due to its high grammage and structural role in industrial winding applications.
Industrial Roll Core Board for Film Winding
Heavy uncoated paperboard >225 g/m² designed for durable cores in plastic film and foil rolls used in manufacturing. Classified precisely as tube and core board in HTS 4805.93.40.50 for its uncoated state and core-forming properties.
Heavyweight Corestock for Tape Dispenser Cores
Uncoated heavyweight paperboard at 250 g/m²+ in rolls, tailored for cores in adhesive tape and label rolls. Falls under HTS 4805.93.40.50 as tube and core board, emphasizing its role in precision winding without further fabrication.
Sulfate Pulp Tube Board for Fabric Rolls
Uncoated sulfate pulp-based paperboard >225 g/m² for cores supporting heavy textile fabric rolls. HTS 4805.93.40.50 designates it as tube and core board for industrial textile applications.