Millboard Felt Paper
Thick, dense felted paperboard known as millboard, used for insulating panels, bookbinding, and gaskets. HTS 4805.50.00.00 covers this uncoated felt paperboard in sheets or rolls, produced by felting wood or rag fibers without chemical coatings. Typically 500-1000 g/m² with high compressive strength.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made mainly from bagasse, bamboo, or cereal straw
Non-wood pulp bases classify under 4803 for other unbleached paperboard.
If molded or pressed into specific gasket/filter shapes
Further worked into articles falls under 4823 for paperboard molds.
If cigarette paper versions in thin felt form
Specialty thin felts for smoking classify under 4813.
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
• Submit fiber content analysis (wood/rag percentages) to distinguish from pressed board under 4803; mislabeling causes delays
• For gasket end-use, provide specs showing no impregnation, preventing shift to 4811 or rubber composites
• Ensure no embossing or printing, as chapter notes direct printed felts to chapter 49 if motifs are primary
Related Products under HTS 4805.50.00.00
Asphalt Saturated Felt Paperboard
Dense felt paperboard saturated with asphalt, used primarily as underlayment in roofing applications to provide waterproofing and protection. It falls under HTS 4805.50.00.00 as felt paperboard, which is a type of uncoated paperboard formed by compressing fibers into a felted structure without further processing beyond note 3 specifications. Typically weighs over 200 g/m² and supplied in rolls for construction use.
Roofing Tar Paper Felt
Heavyweight felt paper impregnated with tar or bitumen for use as a moisture barrier in roofing systems under shingles. Classified under HTS 4805.50.00.00 as uncoated felt paper in rolls, meeting the felted fiber structure without additional processing. Common grammage 100-300 g/m² with high tear resistance.
Bookbinding Grayboard Felt
Recycled fiber felt paperboard, gray in color, used as rigid covers and spines in bookbinding. Classified in HTS 4805.50.00.00 as uncoated felt paperboard sheets, typically 800-1200 g/m², chipboard-style but distinctly felted.
Acoustic Ceiling Tile Felt Paper
Felted paperboard base layer for acoustic ceiling tiles, providing sound absorption before final surfacing. HTS 4805.50.00.00 for uncoated felt paperboard in sheets, 300-500 g/m², fibrous structure traps sound waves.
Rag Felt Paperboard
Traditional felt paperboard made from cotton rag fibers, used for artists' supports and premium gaskets. Under HTS 4805.50.00.00 as specialty uncoated felt paperboard sheets, prized for purity and texture.
Insulating Felt Paperboard
Low-density felt paperboard designed for thermal and acoustic insulation in building walls and machinery. Under HTS 4805.50.00.00 as uncoated felt paperboard, featuring interlaced fibers for air-trapping properties, supplied in rolls over 150 g/m².