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SITCSection 6
U.S. exports of uncoated semichemical fluting paper (corrugating medium), in rolls or sheets (SITC 64151) totaled $37.9M in July 2026.
Importers of Uncoated Semichemical Fluting Paper (Corrugating Medium), in Rolls or Sheets paid $326K in duties in July 2026 — an effective duty rate of 10% on $3.2M in dutiable value, based on actual customs collections rather than the published tariff schedule. Uncoated Semichemical Fluting Paper (Corrugating Medium), in Rolls or Sheets imports of $25.9M in July 2026 ran 14% above the year-to-date monthly average of $22.8M.
Last updated: July 2026 dataSemichemical fluting paper — also called corrugating medium — is the fluted inner layer of corrugated board, produced by a semichemical pulping process that retains more hemicellulose than full chemical pulping, giving the sheet the stiffness and compressibility needed to form and hold a flute profile. Its performance is measured by the Concora Medium Test (CMT), which quantifies flat crush resistance and is a standard specification in corrugated board procurement contracts. Demand for this grade tracks directly with corrugated packaging output, making it sensitive to e-commerce volumes, consumer goods production, and agricultural shipping seasons.
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1.9K shipments/mo
The Concora Medium Test (CMT) measures the flat crush resistance of a fluted paper sample and is the primary quality benchmark for corrugating medium. A higher CMT value indicates better stacking strength in the finished corrugated box. Buyers typically specify minimum CMT values in purchase contracts, and importers should ensure mill test reports confirm compliance with the agreed specification.
Semichemical pulping — typically the neutral sulfite semichemical (NSSC) process — partially delignifies wood chips while retaining hemicellulose, producing a stiff, dense sheet well-suited to flute formation. This process distinguishes semichemical fluting from recycled-fiber medium (OCC-based) and from fully chemical kraft grades, and is a key criterion for classification under SITC 64151.
ImportsExports
Imports
$25.9MYoY · Pro
Exports
$37.9MYoY · Pro
12-mo low · imports
YoY · ProThrough July 2026. Source: U.S. Census Bureau.
Exports · July 2026
destination
Canada and Mexico together take 61% 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.
Supplier Network
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