Bronze-Filled Granular PTFE Compound
Granular PTFE compounded with 40% bronze powder for high load-bearing seals and thrust washers, PTFE predominant per weight rules. HTS 3904.61.00.10 for filled granular fluoropolymers in primary form. Aerospace and oilfield applications.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If halogenated olefin copolymer base
Blends with polystyrene or other olefins shift to 3903 if not >95% PTFE per note (a).
If predominantly bronze metal composite
High metal content may classify as Chapter 74 copper articles over plastics.
If extruded into rigid tubes
Post-processing into profiles moves from primary granules to Chapter 39 plates/sheets/tubes.
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Import Tips & Compliance
• Declare metal content accurately for anti-dumping checks; ensure no metal powder separation in transit
• Common issue: reclassification if bronze > polymer weight
Related Products under HTS 3904.61.00.10
Granular Polytetrafluoroethylene (PTFE) Resin
Pure granular PTFE resin, consisting of polytetrafluoroethylene polymer with monomer units contributing over 95% by weight, used as a base material for molding high-performance parts. Classified under HTS 3904.61.00.10 as granular PTFE in primary form, not chemically modified or blended beyond the polymer series criteria. Ideal for compression molding into bearings, seals, and valve components.
Glass-Filled Granular PTFE Compound
Granular PTFE compounded with 15-25% glass fiber for enhanced mechanical strength, where PTFE remains the predominant polymer (>95% monomer content). Falls under HTS 3904.61.00.10 as filled granular fluoropolymer in primary form per statistical note 1. Commonly used in injection molding for pump housings and electrical insulators.
Carbon-Filled Granular PTFE for Bearings
Granular PTFE filled with carbon powder (10-15%) to improve wear resistance and conductivity, maintaining >95% PTFE monomer content. HTS 3904.61.00.10 covers this compounded granular form for primary processing into self-lubricating bearings. Used in automotive and aerospace applications.
Virgin Granular PTFE Fine Grade
Unfilled fine granular PTFE resin (particle size 30-50 microns) for precision molding, pure polymer meeting 95%+ monomer rule. Classified in HTS 3904.61.00.10 as granular primary form fluoropolymer. Suited for chemical-resistant linings and wire coatings.
PTFE Granules for Medical Grade Applications
USP Class VI compliant granular PTFE, unfilled and biocompatible for molding medical device components like implants. Meets HTS 3904.61.00.10 as pure granular primary fluoropolymer. Sterilizable and low extractables.
High Molecular Weight Granular PTFE
Granular PTFE with ultra-high molecular weight for ram extrusion into rods and tubes, virgin resin form. Classified under 3904.61.00.10 for granular PTFE primary polymers. Used in skiving stock for tapes and liners.