干膜

🛡️ Dry Film & Specialty Protective Films (干膜保护壳/特种干膜)

🌐 HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy 📌 I. Product Definition & Classification: What Exactly is "Dry Film"?

In international trade, "Dry Film" (干膜) is a broad term that can refer to photopolymer dry film (used in PCB manufacturing), protective polyester/polypropylene films, or specialty chemical coatings. The HS Code classification heavily depends on the material composition (plastic vs. chemical derivative) and the form (sheet, roll, or specific coating).

Misclassification often leads to significant duty differences due to US Trade Act Section 301 and IEEPA tariffs.

⚠️ Key Distinction Point:
- If the product is primarily a plastic sheet/film (e.g., PET, PP, PE protective films) → It falls under Chapter 39 (Plastics).
- If the product involves chemically modified cellulose derivatives or specific chemical films not covered under standard plastics → It may fall under 3920.79 or other subheadings, triggering higher base duties.
- Crucial: For US imports from China, almost all plastic films are subject to significant additional tariffs.

📦 II. HS Code Classification Details (2026 Latest Tariff Authority Comparison)

Based on the provided data for "Dry Film/Protective Film", here are the three most likely classifications based on material and form:

🔍 Critical Reminder:
- 3921 vs 3920: 3921 is generally for "Other Plates, Sheets, Film..." where the primary material is plastic. 3920.79 is often for "Other Plastics" or "Cellulose Derivatives" with higher base duties.
- Form Matters: If it is a thin, flexible film, 3921.90.40.10 is often preferred. If it is a thicker sheet or "shell," 3921.90.50.10 may apply.
- Chemical Content: If the film has significant chemical modifications (e.g., coated with specific polymers/chemicals beyond standard plastic), Customs may lean toward 3920.79.10.00, which carries a higher base duty.

💰 III. 2026 Latest Tariff Rate Breakdown (Including Surcharge & Policy Add-ons)

✅ Applicable Country: United States (US)
✅ Origin: China (CN)
✅ Effective Time: 2025/2026 (Ongoing)

🎯 1. 3921.90.50.10 —— Dry Film Protective Shell / Specialty Dry Film (Plastic)

📌 Explanation:
- Base Duty (4.8%): Standard MFN rate for "Other plates, sheets, film..."
- Section 301 (25%): Additional tariff on Chinese plastic goods.
- IEEPA (10%): Additional tariff under International Emergency Economic Powers Act.
- Total: 39.8%. This is a high-cost category. No small parcel exemption applies.

🎯 2. 3921.90.40.10 —— Dry Film / Specialty Film (Thin Film/Plastic)

📌 Note:
- Slightly lower base duty (4.2%) than 3921.90.50.10 (4.8%).
- Often used for thinner, more flexible films or "catch-all" plastic films.
- Total: 39.2%. Still a significant cost driver.

🎯 3. 3920.79.10.00 —— Specialty Dry Film (Chemically Modified)

📌 Warning:
- This classification carries the highest base duty (6.2%).
- Applied when the film is not a standard plastic but involves chemical derivatives (e.g., modified cellulose, specific chemical coatings).
- Total: 41.2%. Avoid this code if possible unless the product truly fits the chemical definition.

🛠️ IV. Customs Clearance Practical Advice (Real-World Pitfall Avoidance)

✅ 1. Documentation Checklist (Non-Negotiable)

✅ 2. Declaration Tips (Key Mnemonics)

🔥 "Material First, Form Second, Code Right, Cost Light!"

✅ 3. Special Case Handling

🌍 V. Global Market Comparison (2026 Latest)

📌 Conclusion:
- USA is the most costly market for plastic/chemical films due to 39.2% - 41.2% total duty.
- EU/UK/AU are relatively stable, focusing on environmental (REACH/RoHS) compliance rather than high tariffs.
- Strategy: If exporting to the US, consider supply chain diversification (e.g., produce in Vietnam/Mexico) to avoid Section 301/IEEPA tariffs.

📌 VI. Common Errors & Pitfalls (Lessons Learned)

❌ Error 1: Declaring "Chemical Film" as "Plastic Film"
👉 Consequence: Customs may audit and reclassify to 3920.79.10.00 → Higher duty (41.2%) + penalties.

❌ Error 2: Ignoring "Chemical Modification"
👉 Consequence: If the film is chemically treated, claiming it's pure plastic is fraud. Audit risk.

❌ Error 3: Assuming De Minimis Applies
👉 Consequence: Small shipments (<$800) from China DO NOT qualify for de minimis if subject to Section 301/IEEPA. Full duty applies.

✅ Correct Practice:

"Protective Dry Film, 0.05mm PET, for Industrial Use, Non-Chemical Coated" → 3921.90.40.10
"Specialty Chemically Modified Film, 0.2mm, for PCB" → 3920.79.10.00

🎯 VII. Conclusion: Professional Declaration, Cost Efficiency!

🎯 Remember the Key:

🔹 "Plastic Film = 3921 (39.2-39.8%)"; "Chemical Film = 3920 (41.2%)"
🔹 "No De Minimis for China in US"; "Material Matters!"

📌 Pro Tip:

• If your dry film is standard plastic, aim for 3921.90.40.10 (lower base duty).
• If it is chemically complex, ensure MSDS is ready for 3920.79.10.00.
• Pre-clearance is highly recommended for bulk shipments to the US.

📣 Act Now:

📞 Contact a licensed customs broker to confirm the exact material composition and HS Code.
🚀 Save costs by getting the code right from day one!

✨ Precision in Classification Saves Thousands!
💼 Your Supply Chain Profit Depends on This!