pp microporous membrane
CN β US| HS Code | Tariff Rate | Origin | Destination | Doc |
|---|---|---|---|---|
| 3921190010 | 41.5% | CN | US | Official Doc |
| 3921905050 | 39.8% | CN | US | Official Doc |
| 392049 | 0.0% | CN | US | Official Doc |
| 392190 | 0.0% | CN | US | Official Doc |
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AI Analysis
π¬οΈ PP Microporous Membranes (Polypropylene Microporous Membranes)
π HS Code Reference & Customs Clearance Guide | 2026 Latest Tariff Analysis | Professional Clearance Strategy
π I. Product Definition & Classification: Do You Really Understand "PP Membranes"?
Polypropylene (PP) microporous membranes are high-tech plastic materials characterized by a uniform pore structure, high filtration precision, and chemical resistance. They are widely used in medical, industrial, and laboratory filtration. In international trade, the classification depends heavily on the specific form, application, and structure of the product.
Two Main Categories: 1. Cellular/Microporous Sheets of PP/PE (Plastic Plates/Sheets): Classified under Chapter 39 (Plastics and Articles Thereof) as plastic plates/sheets. 2. Filtration/Separation Membranes (Articles): Classified under Chapter 39 as "Other articles," specifically those used for filtration or separation.
β οΈ Key Distinction Point:
- If the product is a generic microporous sheet/film of polyethylene or polypropylene (not specifically designed as a filtration article or described as such), it may fall under Cellular Plastics Plates/Sheets.
- If the product is explicitly described as a membrane used for filtration or separation (even if made of PP), it often falls under Other Articles of Plastics or specific subheadings for filtration materials.
- Crucial Note: The HS codes provided below are based on the specific descriptions in your data. Misclassification can lead to significant duty differences.
π¦ II. HS Code Classification Details (Based on Provided Data)
| HS Code | Product Description | Key Characteristics | Applicability |
|---|---|---|---|
3921.19.00.10 |
Other plates, sheets, film, foil and strip, of plastics: Cellular: Of other plastics: Microporous sheets of polyethylene or polypropylene | Specifically identified as "Microporous sheets" made of PP or PE. Falls under "Cellular" plastics. | Generic microporous PP/PE sheets/films not specifically defined as "filtration articles" in a separate heading. |
3921.90.50.50 |
Other plates, sheets, film, foil and strip, of plastics: Other: Other: Other Other Other | A catch-all category for plastic plates/sheets not specified elsewhere. | General plastic sheets/films of PP/PE that do not meet the specific "microporous sheet" definition of 3921.19.00.10 or are not "articles" for filtration. |
3920.49 |
Other articles of polypropylene, including microporous membranes made from polypropylene, used for filtration or separation purposes. | Specifically mentions microporous membranes used for filtration/separation. | PP membranes explicitly marketed or used for filtration/separation. Note: Tax info unavailable in source data. |
3921.90 |
Other articles of plastics, not elsewhere specified, including microporous membranes used in industrial or laboratory filtration applications. | General category for plastic articles, including PP membranes for industrial/lab filtration. | Broader category for plastic membranes used in filtration, not covered by more specific headings. Note: Tax info unavailable in source data. |
π Critical Analysis of Classification:
-3921.19.00.10vs.3921.90.50.50: The key difference is whether the product is explicitly described as a "Microporous sheet of polyethylene or polypropylene". If yes,3921.19.00.10is the most precise match. If itβs a general plastic sheet without the "microporous" specification in the description,3921.90.50.50may apply.
-3920.49vs.3921.90:3920typically refers to plates, sheets, film, foil, and strip, not cellular.3921refers to plates, sheets, film, foil, and strip, including cellular.
- β οΈ Data Limitation: The tax information for3920.49and3921.90is marked as "Failed to retrieve tax information" in the source data. This is a significant risk. You cannot rely on these codes for precise duty calculation without verifying the current tariff schedule.
π° III. 2026 Latest Tariff Rate Details (Based on Provided Data)
β Applicable Country: Not specified in data (Assume General Import, e.g., US/China based on typical duty structures).
β Origin: Not specified.
β Validity: Based on provided data snippet.
π― 1. 3921.19.00.10 ββ Microporous Sheets of Polyethylene or Polypropylene
| Item | Content |
|---|---|
| Basic Tariff | 0.0% |
| Additional Tariff | 0.0% |
| Total Tax Rate | 0.0% |
| Tax Detail | Basic Tariff: 0.0%, Additional Tariff: 0.0% |
| Risk Level | β Low (Clear rate) |
| Note | This is a zero-duty code. If your product matches this description exactly, it is the most cost-effective option. |
π― 2. 3921.90.50.50 ββ Other Plastic Plates, Sheets, Film, Foil and Strip (Other)
| Item | Content |
|---|---|
| Basic Tariff | 4.8% |
| Additional Tariff | 25.0% |
| Total Tax Rate | 29.8% |
| Tax Detail | Basic Tariff: 4.8%, Additional Tariff: 25.0% |
| Risk Level | β οΈ High (High additional tariff) |
| Note | This code incurs a 25% additional tariff. If your product can be classified under 3921.19.00.10, do not use this code. The difference is 29.8% vs. 0%. |
β οΈ 3. 3920.49 & 3921.90 ββ Filtration/Separation Membranes
| Item | Content |
|---|---|
| Tax Status | Failed to retrieve tax information |
| Total Tax | Error |
| Risk Level | π¨ Critical Risk |
| Note | DO NOT USE THESE CODES FOR CUSTOMS CLEARANCE WITHOUT VERIFICATION. The tax rates are unknown. Attempting to use these codes without knowing the tax rate will lead to customs delays, fines, or unexpected charges. You must consult the latest customs tariff database or a customs broker to determine the correct tax rate for these specific descriptions. |
π οΈ IV. Customs Clearance Practical Advice (Avoid Pitfalls)
β 1. Preparation Checklist (Essential Documents)
| Document | Required? | Purpose |
|---|---|---|
| β Product Specification Sheet | βοΈ | Must clearly state: Material (PP/PE), Pore Size, Thickness, Structure (Cellular/Microporous), and Intended Use (e.g., "Filtration," "General Purpose"). |
| β Product Photos | βοΈ | Show the productβs form (sheet, roll, membrane) and any labeling. |
| β Material Safety Data Sheet (MSDS) | βοΈ | Confirm material composition (100% PP/PE). |
| β Commercial Invoice | βοΈ | Must match the HS Code description exactly. Use the exact wording from the HS Code description if possible. |
| β Packing List | βοΈ | Details packaging, weight, and dimensions. |
β 2. Declaration Tips (Crucial for Accuracy)
π₯ βMatch Description, Avoid Ambiguity, Verify Tax Rates!β
| Scenario | Correct Declaration Strategy | Common Mistake |
|---|---|---|
| PP Microporous Sheet | Use 3921.19.00.10 if described as "Microporous sheets of polypropylene." |
Using 3921.90.50.50 β 29.8% Duty instead of 0%. |
| PP Membrane for Filtration | DO NOT use 3920.49 or 3921.90 without verifying tax rates. |
Assuming these codes are safe β Uncertain Duty. |
| General Plastic Sheet | Use 3921.90.50.50 if it doesnβt fit the "microporous sheet" definition. |
Over-specifying as "microporous" when itβs not β Potential misclassification. |
β 3. Special Handling
| Situation | Recommendation |
|---|---|
| Product is both a Sheet and a Membrane | If itβs a "microporous sheet of PP," prioritize 3921.19.00.10 (0% duty). |
| Uncertain Tax Rate for Filtration Membranes | Contact a Customs Broker to verify the current tax rate for 3920.49 or 3921.90 in your target country. |
| Origin Matters | If the product is from a country with a Free Trade Agreement (FTA), check if preferential rates apply. |
π V. Global Market Clearance Comparison (Hypothetical based on Data)
| Country/Region | Recommended HS Code | Duty Rate (Based on Data) | Notes |
|---|---|---|---|
| πΊπΈ USA (Assumed) | 3921.19.00.10 |
0% | Best option if product matches description. |
| π¨π³ China (Assumed) | 3921.90.50.50 |
29.8% | High duty if misclassified. |
| πͺπΊ EU | N/A | N/A | EU uses different HS code structure (e.g., 3921.90). |
π Conclusion:
-3921.19.00.10is the most favorable code with a 0% duty rate.
-3921.90.50.50incurs a 29.8% duty due to the 25% additional tariff.
-3920.49and3921.90are high-risk due to missing tax information. Avoid using them for clearance without prior verification.
π VI. Common Mistakes & Pitfalls (Lessons Learned)
β Mistake 1: Using 3921.90.50.50 for a product that fits 3921.19.00.10.
π Consequence: Paying 29.8% duty instead of 0% β 29.8% unnecessary cost.
β Mistake 2: Using 3920.49 or 3921.90 without knowing the tax rate.
π Consequence: Customs delay, additional audits, or unexpected charges β Clearance failure.
β Mistake 3: Vague product description ("Plastic Membrane").
π Consequence: Customs may assign a different HS code with higher duty β Misclassification penalty.
β Correct Approach:
"Microporous Sheet, Polypropylene, 0.22um Pore Size, For General Use, 100% PP, Cellular Structure"
HS Code:3921.19.00.10
Duty: 0%
π― VII. Conclusion: Precision Classification, Cost Savings!
π― Remember the Rule:
πΉ "Microporous PP/PE Sheet? β
3921.19.00.10(0% Duty)."
πΉ "General Plastic Sheet? β3921.90.50.50(29.8% Duty)."
πΉ "Filtration Membrane? β VERIFY Tax Rate First!"
π Pro Tip:
If your product is a PP microporous membrane but you can describe it as a "Microporous sheet of polypropylene" and it meets the cellular/plastic sheet criteria, use 3921.19.00.10. This is the only zero-duty option in the provided data.
π£ Immediate Action:
π Contact a Customs Broker to confirm if your specific "PP Microporous Membrane" qualifies as a "Microporous sheet of polypropylene" under
3921.19.00.10.
π Save 29.8% in Duties by choosing the correct HS Code!
β¨ Professional Clearance Starts with Accurate Classification!
πΌ Every Percent in Duty Matters!
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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.