Granular, whether or not filled or compounded (see statistical note 1 to this chapter)
Polymers of vinyl chloride or of other halogenated olefins, in primary forms: > Fluoropolymers: > Polytetrafluoroethylene (PTFE) > Granular, whether or not filled or compounded (see statistical note 1 to this chapter)
Duty Rate (from China)
Except as provided in headings 9903.88.12, 9903.88.17, 9903.88.20, 9903.88.54, 9903.88.59, 9903.88.61, 9903.88.63, 9903.88.66, 9903.88.67, 9903.88.68, 9903.88.69, or 9903.88.70, articles the product of China, as provided for in U.S. note 20(c) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(d)
Articles the product of any country, as provided for in subdivision (aa)(ii) of U.S. note 2 to this subchapter
Products classified 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.
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.
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.
Molybdenum Disulfide Filled PTFE Granules
Granular PTFE with 5% MoS2 filler for low-friction bearings and bushings, compliant with Chapter 39 polymer notes. HTS 3904.61.00.10 for compounded granular primary form. Tribological enhancement for dry lubrication.
Reprocessed Granular PTFE from Virgin Stock
Granular PTFE reprocessed from virgin off-spec material, meeting 95%+ monomer purity for non-critical uses. Still primary form under HTS 3904.61.00.10. Cost-effective for gaskets and non-food contact parts.
Ceramic-Filled Granular PTFE for Valves
Granular PTFE with 20% ceramic filler for abrasion-resistant valve seats, PTFE base polymer dominant. HTS 3904.61.00.10 granular filled fluoropolymer. High hardness for flow control applications.