High-Density Insulation Pressboard
Uncoated pressboard sheets >225 g/m², high density 1.25 g/cm³, for switchgear insulation and panel boards in power distribution. Fits 4805.93.20.00 as pressboard in rolls/sheets, no additional working.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If sulfite wrapping paper specs with >40% sulfite fibers and burst index ≥1.47
Sulfite process dominance with wrapping qualities classifies under 4805.30.
If density >0.8 g/cm³ but made from wood, not paper pulp
Medium/high density fiberboard from Chapter 44 if not qualifying as paperboard.
If printed with pictorial representations as primary feature
Chapter note excludes printed motifs dominant over utility, moving to Chapter 49.
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Import Tips & Compliance
• Obtain supplier's ISO 9001 cert for consistent quality; customs audits fiber process compliance
• Avoid varnish or oil impregnation pre-import, as it shifts to 4811 or 4823
• Document non-perforated status; Jacquard-type perforations go to 4823 per chapter note
Related Products under HTS 4805.93.20.00
Transformer Pressboard
High-density pressboard weighing over 225 g/m², made from compressed wood fibers, used as insulation in oil-immersed electrical transformers. It falls under HTS 4805.93.20.00 as uncoated pressboard, not further worked beyond note 3 specifications, in sheets for electrical applications.
Virgin Pulp Pressboard
100% virgin softwood pulp pressboard, 400 g/m² sheets for high-strength electrical applications. Classed in 4805.93.20.00 as other uncoated pressboard over specified weight.
Electrical Presspahn Board
Presspahn is a specialized pressboard from 100% sulfate wood pulp, density 1.0-1.2 g/cm³, over 225 g/m², in sheets for dielectric insulation in high-voltage equipment. Classified under 4805.93.20.00 as uncoated pressboard meeting chapter note 3, ideal for motors and generators.
Density Pressboard Grade A
Grade A density pressboard, 225-500 g/m², compressed to 1.1 g/cm³ min, uncoated sheets for battery separators and electrical insulation. HTS 4805.93.20.00 covers this as 'other' pressboard not further processed per note 3.
Sulfate Process Pressboard Sheets
Pressboard from chemical sulfate pulp, 300 g/m², machine-pressed sheets for marine electrical panels. HTS 4805.93.20.00 for other uncoated pressboard ≥225 g/m², aligning with kraft-like strength.
Battery Separator Pressboard
Specialty pressboard >225 g/m² for lead-acid battery separators, high purity sulfate pulp, uncoated. Under 4805.93.20.00 as pressboard not further worked, essential for industrial batteries.