聚丁烯树脂增韧剂
CN → US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3913905000 | 41.5% | CN | US | Official Doc |
| 3913901000 | 35.0% | CN | US | Official Doc |
| 3901909000 | 41.5% | CN | US | Official Doc |
| 3901901000 | 35.0% | CN | US | Official Doc |
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AI Analysis
🧪 Polybutene Resin Toughening Agent (聚丁烯树脂增韧剂)
🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Level Clearance Strategy
📌 I. Product Definition & Classification: What Exactly is "Polybutene Resin Toughening Agent"?
The "Polybutene Resin Toughening Agent" is a high-performance polymer additive used primarily to improve the impact resistance, flexibility, and toughness of plastic materials (such as PP, PE, or PVC). In international trade, its classification depends heavily on its chemical structure (specifically the monomer unit) and physical state.
Key Distinction: - If it is a derivative of Natural Polymers/Terpene-like structures: It may fall under Chapter 39, Heading 3913 (Modified Natural Polymers). - If it is considered an Olefin Polymer (Ethylene-based logic): Customs authorities often apply a "material logic inference" to classify it under Chapter 39, Heading 3901 (Ethylene Polymers) if the specific sub-heading for "other olefin polymers" is ambiguous or if the product shares structural similarities with ethylene-based elastomers.
⚠️ Critical Classification Point:
- If viewed as a modified natural polymer/terpene derivative → 3913.90.50.00 / 3913.90.10.00
- If viewed as an olefin/ethylene-based polymer logic → 3901.90.90.00 / 3901.90.10.00
📦 II. HS Code Classification Details (Based on Provided Data)
Based on the specific logic provided in the data source, here are the four potential HS Codes and their corresponding rationales:
| HS Code | Product Description | Classification Logic (Rationale) |
|---|---|---|
3913.90.50.00 |
Other Modified Natural Polymers | Logic: Polyterpene elastomers are categorized as high polymers. They fit the material scope of "Natural Polymers and Modified Natural Polymers" under HS 3913.90.50.00. |
3913.90.10.00 |
Modified Natural Polymers (Primary Form) | Logic: The product is a chemical derivative of natural rubber (polyterpene class has a chemical structure homologous to natural rubber). It meets the material attribute of "primary form" under HS 3913.90.10.00. |
3901.90.90.00 |
Other Ethylene Polymers (Miscellaneous) | Logic: The term "Polyterpene" in the product name belongs to the polymer category. There is no conflict with the material logic of "Ethylene Polymers" in the code. It fits the "Other" category inference for this heading. |
3901.90.10.00 |
Ethylene Polymers (Primary Form/Chemical Additive) | Logic: The material "Polybutene Resin Elastomer" fits the elastomer attributes related to "Ethylene Polymers" under HS 3901.90.10.00. The form is classified as a chemical raw material/additive. |
🔍 Key Insight:
- The classification hinges on whether customs views the product as a "Terpene/Natural Derivative" (3913) or an "Olefin/Ethylene Logic Polymer" (3901).
- Both 3913 and 3901 codes in the data share similar total tax structures due to the heavy additional tariffs.
💰 III. 2026 Latest Tariff Rate Details (Including Additional Taxes)
✅ Applicable Country: USA (US)
✅ Origin: China (CN)
✅ Effective Date: 2025/2026 (Post-Trade War Tariffs)
🎯 1. 3913.90.50.00 & 3901.90.90.00 —— Modified Natural Polymers / Other Ethylene Polymers
| Item | Detail |
|---|---|
| Base Tariff | 6.5% (Ad Valorem) |
| Section 301 Additional Tariff | +25.0% (USITC Footnote 9903.88.01 / China Trade Act) |
| IEEPA Additional Tariff | +10.0% (针对中国/香港产品, International Emergency Economic Powers Act) |
| Total Tax Rate | 41.5% |
| Tax Calculation | CIF Value × 41.5% |
| De Minimis Exemption | ❌ Not Eligible (Due to 301 & IEEPA tariffs) |
| Legal Basis Path | Base Tariff → USITC:3913/3901 → FOOTNOTE:301 → IEEPA:9903.01.24 |
📌 Explanation:
- Base (6.5%): Standard MFN tariff for these polymer categories.
- 301 Tariff (25%): Applies to Chinese-made chemical products and polymers.
- IEEPA (10%): Additional punitive tariff on Chinese imports.
- Total (41.5%): This is a high-cost entry barrier. Precision in classification is vital to avoid misclassification penalties.
🎯 2. 3913.90.10.00 & 3901.90.10.00 —— Primary Form Modified Polymers / Ethylene Elastomers
| Item | Detail |
|---|---|
| Base Tariff | 0.0% |
| Section 301 Additional Tariff | +25.0% |
| IEEPA Additional Tariff | +10.0% |
| Total Tax Rate | 35.0% |
| Tax Calculation | CIF Value × 35.0% |
| De Minimis Exemption | ❌ Not Eligible |
| Legal Basis Path | Base Tariff (0%) → USITC:3913/3901 → FOOTNOTE:301 → IEEPA:9903.01.24 |
📌 Note:
- Although the base tariff is 0%, the additional tariffs (25% + 10%) bring the total to 35%.
- This is 6.5% cheaper than the previous category.
- Classification as "Primary Form" or "Elastomer" can yield this saving, but technical justification is required.
🛠️ IV. Customs Clearance Practical Advice (Pitfall Avoidance Guide)
✅ 1. Preparation Checklist (Essential Documents)
| Document | Required | Description |
|---|---|---|
| ✅ Technical Data Sheet (TDS) | ✔️ | Must clearly state chemical composition, monomer type, and molecular weight. |
| ✅ MSDS (SDS) | ✔️ | Safety Data Sheet to confirm it is a chemical additive, not a finished plastic product. |
| ✅ Product Photos | ✔️ | Clear images of packaging, labels, and the product form (pellets, powder, liquid). |
| ✅ Commercial Invoice | ✔️ | Must describe the product accurately (e.g., "Polybutene Resin Toughening Agent, Chemical Additive"). |
| ✅ Origin Certificate | ✔️ | To prove Chinese origin (and thus subject to additional tariffs). |
| ✅ Classification Justification Letter | ✔️ | Explain why it fits either 3913 (Natural Derivative) or 3901 (Polymer Logic). |
✅ 2. Declaration Strategy (Key Mnemonic)
🔥 "Check the Monomer, Confirm the Base, 3913 or 3901, Avoid the Trap!"
| Scenario | Correct Declaration | Incorrect Practice |
|---|---|---|
| Chemical Additive for Plastics | 3913.90 or 3901.90 |
Misclassify as "Plastic Parts" → Higher duties or rejection |
| Polyterpene Structure | 3913.90 (Natural Derivative Logic) |
Classify as 3901 without justification → Risk of audit |
| Ethylene-like Elastomer | 3901.90 (Polymer Logic) |
Classify as 3913 without evidence → Risk of audit |
| Finished Plastic Article | Wrong Chapter (39 vs 40/38) | Declare as "Toughening Agent" when it's a finished part → Severe Penalty |
✅ 3. Special Considerations
| Situation | Handling Advice |
|---|---|
| Dual-Use Chemicals | Ensure the product does not fall under Bisphenol A or other restricted substances. |
| Trade War Impact | With 35%-41.5% total tax, profit margins are squeezed. Consider supply chain diversification or tariff engineering. |
| Pre-Ruling | Highly recommended to apply for an Advance Ruling from US CBP to fix the HS Code before shipment. |
| Compliance Check | Verify if the product is subject to Section 232 or other sanctions (unlikely for polymers, but always check). |
🌍 V. Global Market Comparison (2026)
| Country/Region | Recommended HS Code | Estimated Duty (China Origin) | Certification Requirements | Notes |
|---|---|---|---|---|
| 🇺🇸 USA | 3913.90.50 / 3901.90 |
35% - 41.5% | No specific FDA (unless food contact) | High Tariff Risk |
| 🇨🇳 China | 3913.90 / 3901.90 |
5% - 6.5% | GB Standards | Base duty applies, no US surcharges |
| 🇪🇺 EU | 3913.90 / 3901.90 |
0% - 6.5% | REACH Registration | REACH Compliance is Critical |
| 🇦🇺 Australia | 3913.90 / 3901.90 |
5% - 10% | No specific | Free Trade Agreement may apply |
📌 Conclusion:
- USA is the most challenging market due to Section 301 + IEEPA tariffs.
- EU requires REACH registration for chemical substances, which is a major compliance hurdle.
- China and Australia offer more favorable base rates.
📌 VI. Common Errors & Pitfalls (Lessons Learned)
❌ Error 1: Classifying as "Plastic Parts" (HS 3926)
👉 Consequence: Wrong classification, potential penalties, and delay. Toughening agents are chemical additives, not parts.
❌ Error 2: Ignoring the "IEEPA 10%"
👉 Consequence: Underpaying tax by 10%. CBP audits often catch this.
❌ Error 3: Misclassifying "Natural Polymer" vs. "Synthetic"
👉 Consequence: If declared as 3913 but lacks natural origin proof, CBP may reclassify to 3901 or 3907.
❌ Error 4: Using vague descriptions like "Plastic Additive"
👉 Consequence: CBP will request more information, delaying clearance by weeks.
✅ Correct Practice:
"Polybutene Resin Toughening Agent, Chemical Polymer Additive, for Plastic Modification, Model XYZ, MSDS Attached"
🎯 VII. Conclusion: Professional Classification, Cost Control, Efficiency!
🎯 Remember the Rules:
🔹 "Polymer Logic: 3913 for Natural Derivatives, 3901 for Olefin/Ethylene Logic."
🔹 "Total Tax: 35% (Base 0%) or 41.5% (Base 6.5%). Plan accordingly!"
🔹 "Documentation is Key: TDS, MSDS, and Clear Description prevent delays."
📌 Tips:
- If your product is critical for cost, consider Advance Ruling to lock in the HS Code.
- For EU exports, ensure REACH compliance is met before shipping.
- For US exports, factor in the 35-41.5% tariff in your pricing strategy.
📣 Immediate Action:
📞 Consult a Customs Broker + Provide TDS + Apply for Advance Ruling
🚀 Ensure smooth clearance, cost control, and compliance!
✨ Professional Classification Starts with Precision!
💼 Your Cost Efficiency Deserves Exact Calculation!
Customer Reviews
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) — Broad category of goods (e.g., Chapter 84: Machinery and Mechanical Appliances)
- Heading (4 digits) — More specific grouping within the chapter
- Subheading (6 digits) — Internationally standardized breakdown, used by all WCO member countries
- National subdivisions (8-10 digits) — 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 — The standard duty rate applied to WTO members
- General rate — Applied to countries without trade agreements
- Trade remedy duties — 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.