Polyphenylene Ether Resin
Polyphenylene ether (PPE) resin is a high-performance engineering thermoplastic in primary pellet form, consisting of repeating ether linkages from 2,6-dimethylphenol. The polyether content exceeds 95% by weight, qualifying it as 'other polyethers' under this tariff item. PPE is used in automotive, electronics, and industrial applications for its dimensional stability and heat resistance.
Import Duty Rates by Country of Origin
| Origin Country | MFN Tariff | Surtaxes | Total Effective Rate |
|---|---|---|---|
| 🇨🇳China | Free | — | Free |
| 🇲🇽Mexico | Free | — | Free |
| 🇺🇸United States | Free | — | Free |
| 🇩🇪Germany | Free | — | Free |
| 🇯🇵Japan | Free | — | Free |
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If the PPE is blended with other polymers
Polymer blends are classified based on the predominant monomer unit, which may not be a polyether.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right tariff item — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Confirm the PPE is not blended with polystyrene or other polymers, as blends may be classified elsewhere
• Provide a datasheet showing the polymer is a homopolymer or copolymer with >95% ether content
• Ensure the pellets are not considered 'waste' under chapter note 7
Related Products under Tariff item 3907.29.00
Polybutylene Ether Pellets
Polybutylene ether pellets are aliphatic polyethers derived from 1,4-butanediol, presented in primary form as pellets. They consist of repeating ether linkages with over 95% polyether content by weight, qualifying as 'other polyethers' under this tariff item. These pellets are used in hot-melt adhesives and flexible packaging applications.
Polyether Block Amide Pellets
Polyether block amide (PEBA) pellets are thermoplastic elastomers in primary granular form, composed of polyether segments that contribute over 95% by weight to the polymer chain. The polyether blocks provide flexibility, while the amide blocks offer strength, making them suitable for sportswear, medical tubing, and automotive components. They are classified as 'other polyethers' because the polyether component predominates.
Polyetherimide Resin Granules
Polyetherimide (PEI) resin granules, such as Ultem, are aromatic polyethers in primary form, featuring imide-ether structures. The polyether monomer units contribute over 95% by weight, qualifying them as 'other polyethers' under this tariff item. PEI is used in aerospace, high-temperature electrical, and medical applications due to its thermal stability and mechanical strength.
Polyoxypropylene Glycol Industrial Grade
Industrial-grade polyoxypropylene glycol (PPG) is a liquid polyether in primary form, with propylene oxide-derived ether linkages comprising over 95% by weight. It is used as a raw material in polyurethane foams, coatings, and sealants. The product is classified as 'other polyethers' because it is not a polyether polyol specifically named elsewhere.
Polysulfone Pellets USP Grade
USP-grade polysulfone pellets are high-purity polyethers in primary form, with diphenyl sulfone ether linkages exceeding 95% polymer content. They are used in medical devices, food contact applications, and water filtration systems due to their biocompatibility and chemical resistance. The product is classified as 'other polyethers' under this tariff item.
Polytetramethylene Ether Glycol (PTMEG)
Polytetramethylene ether glycol (PTMEG) is a liquid polyether polyol in primary form, with tetrahydrofuran-derived ether units comprising over 95% by weight. It is a key intermediate for spandex, polyurethane elastomers, and copolyester ethers. The product is classified as 'other polyethers' because it is not specifically named in other headings.