Sourcing PEKK resin from China

PEKK resin duty and classification

Read from the UK Trade Tariff on 1 October 2026, heading 3911 covers specified resins and other polymers in primary forms. For PEKK, investigate 3911 90 19 90, the residual line for other condensation or rearrangement polymerisation products. The supplied description does not name PEKK. The table shows purchasing forms against this candidate code, rather than separate tariff lines. See the wider PEEK resin guide.

The supplied lines all carry 0% duty for goods from China, with no anti-dumping or countervailing measures and no suspensions recorded. The candidate line attaches import and export waste controls. Waste shipment controls apply only to material classed as waste. For notified waste imports into England, the exporter applies in the dispatch country and shipment awaits the relevant authorities' consent. Confirm the control route for any waste material with your customs broker before shipping.

Give your broker the polymer identity, composition, additives and physical form, then confirm the commodity code. Confirm with HSE the UK REACH registration requirements or exemptions applicable to the polymer, monomers and reactants, taking account of composition and planned annual quantities. Obtain constituent information before ordering. The worked order values are illustrative; see import duty and VAT for the calculation method.

Specify PEKK chemistry and processing behaviour

Write polyetherketoneketone in the specification, rather than accepting a generic polyaryletherketone description. Name the producer and grade, intended process, unfilled or compounded composition, colour and permitted recycled content. Request the terephthalic and isophthalic unit ratio, thermal analysis, melt viscosity with its test conditions, moisture specification and drying instructions.

For powder, agree particle-size distribution, particle shape, flow behaviour and permitted agglomeration. For pellets, agree dimensions and fines limits. Match crystallisation behaviour and processing instructions to your moulding, printing or composite process. Approve a trial using the intended equipment and retain the accepted sample.

Ask for constituent information and a safety data sheet. Ask HSE to confirm any chemical classification and safety data sheet requirements relevant to dust and residual solvents. Review the UK REACH importer guide and use testing and certification support when the supplier's evidence does not answer your intended-use questions.

Worked duty example

Illustrative example, not a quote: Illustrative order: 40 kg of unfilled PEKK pellets; values are illustrative under 3911 90 19 90, invoiced at £3,000 free on board, with £1,500 of freight and insurance to the UK. The customs value is £4,500. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £4,500, so it is £900. With no duty, the only import tax is the VAT, which a VAT-registered importer can usually reclaim. The import duty and VAT guide explains each step.

Inspection checklist

Identity: match producer, grade and batch references across packaging, the purchase order and certificate of analysis; investigate unexplained changes.

Processing: compare thermal analysis and melt viscosity with the approved specification, using the same test conditions; trial a retained batch sample.

Physical condition: inspect powder for clumps and foreign particles, or pellets for fines and mixed material; check moisture against the agreed method.

Packing: check sealed liners, bag damage, batch separation and storage instructions on arrival. Record findings using the quality inspection guide.

What goes wrong

A supplier may offer a different polymer or a different PEKK grade as an equivalent. Changes in composition, crystallisation behaviour or melt viscosity can invalidate an approved processing setup. A generic datasheet does not show whether the delivered batch matches the trial material.

Powder agglomeration, contamination, moisture or undocumented reused material can disrupt processing. Hold suspect batches apart from accepted stock and resolve discrepancies before production. Agree batch acceptance evidence and change approval with the producer through factory verification.

Cambridge China Bridge sources these products for UK businesses, checking the factory and the documents before shipment. See factory verification. For repeat volumes, see container programmes.