U.S. exports of Uncoated Kraft Paper & Paperboard, Not Elsewhere Specified, 225 g/m² or Over (SITC 64148) totaled $10.7M in August 2026.
Importers of Uncoated Kraft Paper & Paperboard, Not Elsewhere Specified, 225 g/m² or Over paid $360K in duties in August 2026, an average duty rate of 5.07% — duty actually collected as a share of the imports that cleared customs, not the published tariff schedule. Uncoated Kraft Paper & Paperboard, Not Elsewhere Specified, 225 g/m² or Over imports of $7.1M in August 2026 ran 12% above the year-to-date monthly average of $6.4M.
Last updated: August 2026 dataAt 225 g/m² and above, uncoated NES kraft paperboard enters territory more commonly associated with rigid packaging substrates — grades in this range are used for solid fiber boxes, heavy-duty industrial wrapping, and as liner board in multi-ply constructions where stiffness and puncture resistance are priorities. The weight threshold places this product at the heavier end of the kraft paper family, and classification here requires clear documentation that the product is not a more specifically described grade such as testliner or fluting. Canada is a significant supplier of heavier kraft paperboard grades to the US market, given its integrated forest-products industry.
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472 import shipments a month
Testliner and other containerboard grades have specific definitions tied to their intended use in corrugated box construction and their recycled-fiber content. Uncoated NES kraft at 225 g/m² or over that is made from virgin kraft pulp and not specifically designed as a corrugated liner would fall under 64148, while recycled-fiber or specifically defined containerboard grades are classified elsewhere. Mill specification sheets and fiber composition data help establish the correct heading.
Heavy uncoated kraft paperboard in this weight range is used for solid fiber shipping containers, heavy industrial wrapping, protective interleaving for metal coils and glass, and as a structural ply in laminated board constructions. Its high basis weight provides the rigidity and burst strength needed for demanding industrial packaging applications.
Basic heading 213 of 766 in section 6
Basic heading 64148 · $10.7M of $13.0B
Exports · August 2026
destination
Mexico and Canada together take 74% of it.
customs district
Census does not publish district detail for this classification system.
origin
Census does not publish state detail for this classification system.
entry
Census does not publish port detail for this classification system.
ImportsExports
Imports
$7.1MYoY · free account
Exports
$10.7MYoY · free account
12-mo low · imports
Low · free accountOver the twelve months to August 2026, the U.S. imported $71.0M of Uncoated Kraft Paper & Paperboard, Not Elsewhere Specified, 225 g/m² or Over and exported $141.8M.
Through August 2026. Source: U.S. Census Bureau.
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