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HSChapter 55
U.S. imports of nylon & polyamide staple fibers, carded, combed or processed for spinning (HS 550610) totaled $4K in April 2026, traded with 3 countries.
Nylon & Polyamide Staple Fibers, Carded, Combed or Processed for Spinning imports of $4K in April 2026 ran 93% below the year-to-date monthly average of $58K.
Last updated: April 2026 dataNylon and other polyamide staple fibers that have been carded, combed, or otherwise prepared for spinning enter under a single US tariff line (5506100000), distinguishing them from unprocessed polyamide fibers in heading 5503. The carding or combing step aligns fibers for direct use in ring or open-end spinning systems, making this a more value-added intermediate than raw staple. Taiwan leads US supply, with China and Austria also among the notable sources.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
A polyamide staple fiber classifies under heading 5503 when it is in raw, unprocessed bulk form — not carded, combed, or otherwise prepared for spinning. Once it undergoes carding (aligning fibers into a web), combing (removing short fibers and further aligning), or equivalent mechanical processing that prepares it for direct spinning, it moves to heading 5506. The supplier's processing documentation or a technical description of the fiber's state at time of export is the key evidence for this distinction.
Nylon staple fibers from certain origins have historically attracted antidumping scrutiny in global markets, and importers sourcing from China should verify current CBP and USTR guidance for any applicable Section 301 measures on textile intermediates. Taiwan, as the leading US supplier, does not currently benefit from a US free trade agreement, so standard MFN duty rates apply. Consulting a licensed customs broker before placing orders from new origins is advisable given the evolving trade remedy landscape for synthetic fiber inputs.
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Monthly import values over time
| Country | Imports | Exports | Balance |
|---|---|---|---|
| NETHERLANDS | -- | $364K | +$364K |
| NEW ZEALAND | -- | $149K | +$149K |
| CHINA | $4K | $125K | +$121K |
| TURKEY | -- | $68K | +$68K |
| AUSTRALIA | -- | $30K | +$30K |
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 5506100000 | SYN STP FIB CRD CMB OR PRS SPNG NYL OR OTH PLYAMD | $4K | 40.01% | $2K |
SYN STP FIB CRD CMB OR PRS SPNG NYL OR OTH PLYAMD
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 5506100000 | SYN STP FIB CRD CMB OR PRS SPNG NYL OR OTH PLYAMD | $785K |
SYN STP FIB CRD CMB OR PRS SPNG NYL OR OTH PLYAMD
18.5K kg
SYN STP FIB NT CRD, CMB OR PRSD SPNG, OF POLYESTER
HS 550320
ARTIF STP FIB NT CRD, CMB OR PRSD SPNG, VIS RAYON
HS 550410
YRN N SW TH MM ST FIB RT SL SYN STP FIB >=85% S FB
HS 551110
STPL FIB ARAMIDS NOT CARD/COMBD/PRCSD FOR SPINNING
HS 550311
SYN STP FIB NT CRD, CMB OR PRSD SPNG, ACRY/MODACRY
HS 550330
SYN STP FIB NOT CARD, CMB OR PRSD SPNG, NESOI
HS 550390
| State | Imports | Exports | Balance |
|---|---|---|---|
| North Carolina | -- | $558K | +$558K |
| California | -- | $197K | +$197K |
| Michigan | -- | $12K | +$12K |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| CLEVELAND, OH | -- | $268K | +$268K |
| LOS ANGELES INTERNATIONAL AIRPORT, CA | -- | $188K | +$188K |
| ATLANTA, GA | -- | $167K | +$167K |