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Polypropylene Microporous Separator Film

A microporous polypropylene sheet used as battery separators, featuring interconnected pores for electrolyte flow. Classified in HTS 3921.19.0010 due to its cellular microporous structure of polypropylene film, meeting the 'other plastics' cellular category.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China6.5%+35.0%41.5%
🇲🇽Mexico6.5%+10.0%16.5%
🇨🇦Canada6.5%+10.0%16.5%
🇩🇪Germany6.5%+10.0%16.5%
🇯🇵Japan6.5%+10.0%16.5%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

3921.19.00Same rate: 41.5%

If cellular but not microporous PE/PP

Other cellular plastic sheets excluding specifically named microporous PE/PP go to parent 3921.19.

3920.59Lower: 16.5% vs 41.5%

If non-cellular polypropylene film

Lacking microporous cellular structure, it falls under non-cellular vinyl chloride-free plastic sheets.

8547.90.00Lower: 39.6% vs 41.5%

If coated with insulating material and specifically for batteries

Certain battery separator assemblies with electrical insulation move to Chapter 85 insulating fittings.

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Import Tips & Compliance

• Include technical data sheets proving Gurley air permeability <500 sec/100cc and porosity 30-50% for proper 3921.19.0010 classification

• Ensure COO certification; many origins qualify for Free (AU,CA) but confirm via HTS special column

Related Products under HTS 3921.19.00.10

Microporous Polyethylene Breathable Film

This is a cellular microporous polyethylene film designed for breathable applications, allowing vapor transmission while blocking liquids. It falls under HTS 3921.19.0010 as it is a microporous sheet of polyethylene, classified as 'other plastics' cellular plates, sheets, film with microvoids formed during extrusion.

Housewrap Microporous Polypropylene Film

Microporous polypropylene breathable film used in construction housewrap for moisture vapor transmission. Falls under HTS 3921.19.0010 as cellular microporous sheet of polypropylene in the 'other plastics' category.

Microporous Polyethylene Roofing Underlayment Film

Breathable microporous PE film sheet serving as synthetic roofing underlayment, preventing moisture buildup. HTS 3921.19.0010 applies to its cellular microporous polyethylene construction as 'other plastics' sheets.

Battery Grade PP Microporous Membrane

High-purity microporous polypropylene membrane for lithium-ion battery separators with controlled pore distribution. Classified under HTS 3921.19.0010 for microporous polypropylene cellular film sheets.

Breathable PE Diaper Backing Film

Microporous polyethylene film used as soft, breathable backsheet in disposable diapers. HTS 3921.19.0010 covers this cellular microporous polyethylene sheet in the other plastics cellular series.

Surgical Drape Microporous PP Film

Microporous polypropylene film for sterile surgical drapes and gowns, providing bacterial barrier with breathability. Falls under HTS 3921.19.0010 as cellular microporous polypropylene sheet.