Unbleached Kraft Linerboard 300 gsm
Unbleached kraft paperboard in rolls, weighing 300 g/m², made from at least 80% sulfate process wood fibers, used as the outer liner for corrugated boxes. It meets kraftliner specifications with high Mullen bursting strength suitable for heavy-duty packaging. Classified under 4804.51.00.00 as uncoated kraft paperboard over 225 g/m², unbleached, not qualifying as newprint under 4802/4803.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If in rolls and meets specific Mullen bursting strength table for kraftliner
Qualifies as kraftliner under 4804.11 if weight >115 g/m² with minimum burst strength, shifting from general 'other kraft'.
If bleached
Bleaching changes classification to bleached kraft paperboard under 4804.61, altering duty rates.
If coated on one or both sides
Coating moves it to paperboard, coated on one/both sides, in 4810, excluding uncoated kraft.
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Import Tips & Compliance
• Verify fiber composition exceeds 80% sulfate/soda wood fibers via lab testing to confirm kraft status and avoid reclassification
• Provide mill test certificates showing weight ≥225 g/m² and unbleached status; common pitfall is misdeclaring bleached variants
• Ensure documentation distinguishes from heading 4802/4803 newprint base paper to prevent duty adjustments
Related Products under HTS 4804.51.00.00
Unbleached Heavy Kraft Paperboard Sheets 250 gsm
Uncoated unbleached kraft paperboard in sheets, 250 g/m², produced via sulfate process for industrial packaging and void fillers. High strength from wood fibers makes it ideal for protective inserts. Falls under 4804.51.00.00 as other uncoated kraft paperboard ≥225 g/m², unbleached.
Unbleached Kraft Testliner 225 gsm Rolls
Unbleached uncoated kraft paperboard rolls at 225 g/m², used as inner liner for corrugated fiberboard boxes. Made predominantly from sulfate wood pulp for burst resistance. HTS 4804.51.00.00 covers this as other unbleached kraft ≥225 g/m².
Industrial Unbleached Kraft Board 400 gsm
Heavy unbleached kraft paperboard, 400 g/m² in sheets, for machinery padding and heavy packaging. Sulfate process ensures strength without coating. Under 4804.51.00.00 as uncoated, unbleached kraft >225 g/m².
Unbleached Kraft Packaging Paperboard 275 gsm
Uncoated unbleached kraft paperboard rolls, 275 g/m², for manufacturing rigid boxes and inserts. High tensile strength from chemical sulfate pulp. Fits 4804.51.00.00: other kraft ≥225 g/m², unbleached.
Unbleached Sulfate Kraft Liner 350 gsm Sheets
Sheets of unbleached kraft paperboard, 350 g/m², sulfate process, for top liner in shipping containers. Uncoated for recyclability. HTS 4804.51.00.00 for unbleached other kraft ≥225 g/m².
Heavy Duty Unbleached Kraft Board 500 gsm Rolls
Extra heavy unbleached uncoated kraft paperboard rolls, 500 g/m², for pallet separators and industrial mats. Sulfate fibers provide superior durability. Classified in 4804.51.00.00 as kraft >225 g/m².