聚酯电子元件箔

⚡ Polyester Capacitor Foil (聚酯电容器箔)

🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Transit Strategy 📌 I. Product Definition: What exactly is "Polyester Capacitor Foil"?

Polyester Capacitor Foil is a specialized high-performance metal material used primarily in the manufacturing of capacitors for electronic devices. It is not just "foil," but a critical component requiring precise thickness and surface treatment.

In international trade, the classification hinges on one key question: Is it in a basic raw form, or has it been processed into a finished plastic/film product?

• Scenario A: Basic Form (Chemical/Polymers) If the foil is considered a "primary form" of polyester (polymers), it falls under Chapter 39 (Plastics and Articles Thereof), specifically Heading 3907. This applies when the material is defined by its chemical composition as a basic polyester intermediate.

• Scenario B: Finished Article (Plastic Sheets/Foils) If the foil is treated, cut, or processed into a specific form factor (like a film or sheet) ready for use in capacitor assembly, it may fall under Heading 3921 (Other Plates, Sheets, Film, Foil, and Strip, of Plastics).

⚠️ Key Distinction Point: - If the product is identified as a polymer intermediate in its basic state → 3907.99.50 - If the product is identified as a plastic film/foil article → 3921.19.00

📦 II. HS Code Classification Details (2026 Latest Authorized Reference)

Based on the provided data, the following HS Codes are applicable to Polyester Capacitor Foil. Note that multiple codes may apply depending on the specific physical state and customs interpretation of "basic form" vs. "finished foil."

| HS Code | Product Description (from Data) | Key Characteristics | Tax Classification Logic | |--------|----------|--------------------------| | 3921.19.00.90 | Polyester Capacitor Foil: Form is foil, material is polyester. Belongs to "Other plastic-made" categories. | Treated as a plastic foil/film article. | Classified under "Other plates, sheets, film..." of Chapter 39. | | 3907.99.50.10 | Polyester Capacitor Foil: Material is polyester, form is foil. Meets characteristics of "Polyester basic primary forms". | Treated as a chemical/polymer intermediate. | Classified under "Other polyesters, in primary forms" in Chapter 39. | | 3907.99.50.50 | Polyester Capacitor Foil: Material is polyester, form is foil. Belongs to "Other polyester intermediate forms". | Treated as an intermediate polymer product. | Classified under "Other polyesters, other forms" in Chapter 39. | | 3921.19.00.90 | Polyester Capacitor Foil: Form is foil, material is polyester. Belongs to "Other plastic film/foil". | Treated as a plastic film/foil article. | Repeated entry for "Other plastic film/foil" under Chapter 39. | | 3907.99.50.10 | Polyester Capacitor Foil: Material is polyester, form is foil. Meets characteristics of "Polyester basic form features". | Treated as a chemical/polymer intermediate. | Repeated entry for "Primary form" under Chapter 39. |

🔍 Key Reminder: - The Total Tax Rate is 41.5% for ALL listed HS Codes. - The difference between 3907 (Polymer/Chemical) and 3921 (Plastic Product) often depends on thickness, width, and specific processing history. - Do not mix classifications: If you classify a finished foil as a "primary polymer" incorrectly, customs may reclassify it, causing delays.

💰 III. 2026 Tariff Rate Breakdown (Detailed Tax Components)

✅ Applicable Country: United States (US) ✅ Origin: China (CN) ✅ Total Effective Tariff Rate: 41.5%

For ALL the HS Codes listed above (3921.19.00.90, 3907.99.50.10, 3907.99.50.50), the tax structure is identical:

🎯 1. Tax Composition Details

📌 Explanation: - 6.5% Base: This is the standard WTO-bound rate for these plastic/polyester items. - 25.0% Section 301: This is the significant trade war tariff. It applies to almost all Chinese-manufactured polyester films/foils. - 10% Section 122: An additional layer of protectionist tariff. - Cumulative Effect: You pay 41.5% on the CIF (Cost, Insurance, and Freight) value. This is a HIGH cost burden.

📉 2. Tax Calculation Example

If you import $10,000 USD worth of Polyester Capacitor Foil (FOB) + $500 Freight + $100 Insurance = $10,600 CIF:

• Total Duty Payable: $10,600 × 41.5% = $4,399 USD
• Effective Cost Increase: Your landed cost increases by nearly 42%.

⚠️ Critical Note: - There is no de minimis exemption for these goods from China if the total value exceeds the threshold (currently $800, but often scrutinized for Section 301 goods). - Voluntary Exclusion Programs: Historically, some polyester films had exclusions, but they are highly specific and often expire. Check current USITC exclusion lists.

🛠️ IV. Customs Clearance Practical Advice (Avoid Pitfalls)

✅ 1. Documentation Checklist (Non-Negotiable)

✅ 2. Classification Strategy: 3907 vs. 3921

🔥 Pro Tip: - Consistency is Key: Ensure your invoice description matches the HS Code classification. - Avoid "Generic Terms": Do not just write "Foil." Write "Polyester (PET) Capacitor Foil, 12 micron, 500mm width." - Labeling: Clearly mark packages with "Made in China" to avoid origin fraud accusations.

✅ 3. Special Circumstances

🌍 V. Global Market Comparison (2026 Outlook)

📌 Strategic Insight: - The US market is extremely expensive for Chinese-origin polyester foils due to the 35% combined additional tariffs (25% + 10%). - Consider supply chain diversification: Sourcing from Vietnam, India, or Mexico may reduce total landed cost despite higher base prices, if US tariffs can be avoided.

📌 VI. Common Errors & Pitfalls (Lessons Learned)

❌ Error 1: Classifying as "Aluminum Foil" (7607) 👉 Result: If it's actually polyester-backed, this is fraud. Penalties include 100% duty reversal + fines.

❌ Error 2: Ignoring Section 122 Tariff 👉 Result: Under-declaring by 10%. Customs will audit, leading to back taxes + interest.

❌ Error 3: Vague Description "Plastic Foil" 👉 Result: Customs may classify under the highest duty rate within the chapter (often 3921.90 which might have higher base rates).

✅ Correct Declaration:

"Polyester Capacitor Foil, PET Material, 15 Micron, 1 Meter Width, Roll Form, Origin: China, HS Code: 3907.99.50.10"

🎯 VII. Conclusion: Professional Clearance = Cost Savings

🎯 Key Takeaway:

🔹 Polyester Capacitor Foil from China → USA = 41.5% Total Tariff. 🔹 HS Code Choice (3907 vs 3921) matters for compliance, but NOT for rate (both are 41.5%). 🔹 Documentation must be precise to avoid delays.

📌 Pro Tip:

If your volume is high, consider applying for an Exclude Number (if available) or explore Free Trade Agreements (if sourced from a non-China country).

📣 Immediate Action:

📞 Contact your Customs Broker with the product specs. 📄 Prepare Detailed Technical Data Sheets. 💰 Factor in the 41.5% cost in your pricing model.

✨ Precision Classification, Predictable Costs! 💼 Every percent saved is pure profit.