Polyamide Modified Board
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3921190090 | 41.5% | CN | US | Official Doc |
| 3921905050 | 39.8% | CN | US | Official Doc |
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AI Analysis
π‘οΈ Polyamide Modified Board (Engineering Plastic Sheets)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Level Clearance Strategy
π I. Product Definition & Classification: Do You Truly Understand "Polyamide Modified Board"?
Polyamide (PA), commonly known as Nylon, is a high-performance engineering plastic. When modified (reinforced with glass fiber, carbon fiber, or other additives), it becomes a rigid, durable, and chemical-resistant board or sheet. In international trade, its classification depends heavily on its physical structure (cellular vs. non-cellular) and chemical composition.
For Polyamide Modified Boards, there are two primary classification paths based on the provided data:
1. Cellular Polyamide Boards:
- If the board has a foamed/porous structure (lightweight, insulating properties).
- Note: Standard solid engineering boards are usually NOT cellular.
2. Non-Cellular (Solid) Polyamide Boards:
- If the board is solid, dense, and rigid (standard industrial sheets, machined parts, or raw stock).
- This is the most common classification for standard "Modified Polyamide Boards" used in machinery, automotive, or electrical applications.
β οΈ Key Distinction Point:
- If the product has a foamed/airy core β It is "Cellular" β HS 3921.19.00.90
- If the product is solid/dense β It is "Other" β HS 3921.90.50.50
π¦ II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)
| HS Code | Product Description | Applicable Scenario | Structure Type |
|---|---|---|---|
3921.19.00.90 |
Cellular plates, sheets, film, foil, and strip of plastics: Other plastics (including Polyamide/PA) | Lightweight insulation boards, foamed PA sheets, acoustic panels | β Cellular (Foamed) |
3921.90.50.50 |
Other plates, sheets, film, foil, and strip of plastics: Other: Other: Other (General Non-Cellular Plastics) | Solid Nylon sheets, Glass-fiber reinforced PA boards, standard engineering plastic plates | β Non-Cellular (Solid) |
π Important Reminder:
- Most standard "Polyamide Modified Boards" (e.g., PA6-GF30, PA66) are solid and do not have a cellular structure. Therefore, they typically fall under3921.90.50.50.
- Do not classify solid PA boards as3921.19.00.90unless they are explicitly foamed/porous. Misclassification leads to incorrect tax calculations.
π° III. 2026 Latest Tariff Rate Details (Including Surtaxes & Policy Add-ons)
β Applicable Country: United States (US)
β Country of Origin: China (CN)
β Effective Date: From November 10, 2025 (including subsequent imports)
π― 1. 3921.19.00.90 ββ Cellular Plastic Sheets (Of Other Plastics)
| Item | Content |
|---|---|
| Basic Tariff Rate | 0.0% (ad valorem) |
| Surtax (Section 301) | 0.0% |
| Total Tax Rate | 0.0% |
| Tax Calculation | CIF Value Γ 0% = $0 |
| De Minimis Exemption | β Not Applicable (Even if 0%, documentation is required) |
| Legal Basis Path | HTSUS:3921.19.00.90 |
π Explanation:
- Zero Tariff: This category currently has no basic tariff and no Section 301 surtax.
- Advantage: If your product is genuinely cellular (foamed PA), this is a highly advantageous classification with 0% duty.
- Caution: You must provide proof of cellular structure (e.g., density test, cross-section photos) to support this classification.
π― 2. 3921.90.50.50 ββ Other Non-Cellular Plastic Sheets (General)
| Item | Content |
|---|---|
| Basic Tariff Rate | 4.8% (ad valorem) |
| Surtax (Section 301) | +25.0% |
| Total Tax Rate | 29.8% |
| Tax Calculation | CIF Value Γ 29.8% |
| De Minimis Exemption | β Not Eligible (High tariff rate exceeds de minimis thresholds) |
| Legal Basis Path | HTSUS:3921.90.50.50 β Section 301 Footnote |
π Note:
- This is the standard classification for solid Polyamide (Nylon) boards.
- Total Duty: 29.8% is significant and must be factored into your cost structure.
- Even though the base tariff (4.8%) is moderate, the 25% Section 301 surtax dominates the cost.
π οΈ IV. Customs Clearance Practical Advice (Real-World Pitfall Avoidance Guide)
β 1. Preparation Checklist (All Required)
| Material | Mandatory | Description |
|---|---|---|
| β Technical Data Sheet (TDS) | βοΈ | Must specify material type (e.g., PA6, PA66), additives (GF, CF), and density (to prove cellular vs. solid) |
| β Cross-Section Photos | βοΈ | Crucial to prove if the board is solid or foamed/cellular |
| β Product Photos | βοΈ | Clear images of the board, labeling, and packaging |
| β Commercial Invoice | βοΈ | Describe as "Polyamide Sheet" or "Nylon Board," specify "Solid" or "Cellular" |
| β Packing List | βοΈ | Detail weight and dimensions |
| β Origin Certificate (CO) | βοΈ | Required to confirm country of origin (China) for surtax application |
β 2. Declaration Tips (Key Mantras)
π₯ "Solid is Standard, Cellular is Special, Proof is Key, Tax Varies!"
| Scenario | Correct Declaration | Wrong Practice |
|---|---|---|
| Solid Nylon Board (Standard) | 3921.90.50.50 (29.8%) |
Misdeclare as Cellular β Audit Risk & Back Tax |
| Foamed PA Board (Insulation) | 3921.19.00.90 (0.0%) |
Misdeclare as Solid β Overpay 29.8% |
| Mixed Packaging | Declare separately by structure | Combine solid and cellular in one line β Confusion & Delay |
β 3. Special Situations Handling
| Situation | Handling Advice |
|---|---|
| Glass-Fiber Reinforced PA | Still 3921.90.50.50 (Solid). Reinforcement does not change "cellular" status. |
| Custom Shapes/Cuts | If cut to shape but still solid, 3921.90.50.50. Do not split into "parts" unless they are finished articles. |
| Sample vs. Bulk | Both are subject to tariffs. Ensure documentation matches. |
| Origin Proof | Since origin is China, 25% surtax applies to 3921.90.50.50. No exemption available under current rules. |
π V. Global Market Comparison (2026 Latest)
| Country/Region | Recommended HS Code | Tariff | Certification | Note |
|---|---|---|---|---|
| πΊπΈ USA | 3921.90.50.50 (Solid) |
29.8% | - | High tariff due to Section 301 |
| πΊπΈ USA | 3921.19.00.90 (Cellular) |
0.0% | - | Only if genuinely foamed |
| π¨π³ China | 3921.90.50.50 |
5.0% | RoHS | Low base tariff |
| πͺπΊ EU | 3921.90.00 |
5.3% | REACH | No US-style surtax |
| π¦πΊ Australia | 3921.90.00 |
5.0% | - | Competitive market |
π Conclusion:
- USA is the most expensive market for solid polyamide boards due to the 29.8% total duty.
- Cellular products enjoy 0% duty in the USA, offering a huge cost advantage if applicable.
- EU and China have moderate, predictable tariffs (~5%) without aggressive surtaxes.
π VI. Common Errors & Pitfall Guide (Lessons Learned)
β Error 1: Declaring solid PA boards as "Cellular" to avoid 25% surtax
π Consequence: Customs audit, penalty, and back-taxes of 29.8% + fines.
Proof Needed: Density test reports or cross-section photos.
β Error 2: Ignoring the "Modified" aspect in description
π Consequence: Vague description leads to customs inquiry or reclassification.
Correct Description: "Polyamide 6, Glass Fiber Reinforced, Solid Board"
β Error 3: Assuming all "Plastic Sheets" are the same
π Consequence: Misclassification between 3921.19 (Cellular) and 3921.90 (Non-Cellular) results in tax errors.
β Correct Practice:
"Solid Polyamide Board, PA6-GF30, Black, 5mm Thickness, Non-Cellular, For Industrial Use"
π― VII. Conclusion: Precise Classification Saves Money!
π― Remember the Mantra:
πΉ "Cellular = 0% Tax, Solid = 29.8% Tax."
πΉ "Prove your structure: Photos & Density Tests are your Best Friends."
πΉ "Don't guess the HS Code, let the physical properties decide."
π Pro Tip:
If you can modify your product design to include a lightweight cellular structure (foaming process) without compromising application requirements, you could save 29.8% in duty in the US market. However, this must be a genuine structural change, not just a labeling trick.
π£ Immediate Action:
π Contact a licensed customs broker + Provide Cross-Section Photos + Apply for Advance Ruling if uncertain.
π Clear your Polyamide Boards smoothly, save costs, and boost your profit margins!
β¨ Professional Clearance Starts with Accurate Classification!
πΌ Every percentage point of tax matters in global trade!
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About HS Code Classification
The Harmonized System (HS) is an internationally standardized nomenclature developed by the World Customs Organization (WCO) to classify traded products. Over 200 countries use the HS system as the basis for customs tariffs, trade statistics, and import/export regulations.
Each HS code follows a hierarchical structure:
- Chapter (2 digits) β Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) β More specific grouping within the chapter
- Subheading (6 digits) β Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) β Country-specific extensions for further classification, such as US HTSUS 10-digit codes
Correct HS code classification is essential for smooth customs clearance, accurate duty payment, and compliance with trade regulations. Misclassification can lead to customs delays, overpayment of duties, or penalties.
When importing from CN to US, the applicable tariff rates may include:
- Most-Favored-Nation (MFN) rate β The standard duty rate applied to WTO members
- General rate β Applied to countries without trade agreements
- Trade remedy duties β Additional tariffs such as Section 301 (anti-dumping), Section 232 (national security), or countervailing duties
The information provided on this page is for reference purposes only. For official classification, please consult with your local customs authority or a licensed customs broker.