Sourcing LCP resin pellets from China

Duty on liquid crystal polymer pellets

Read from the UK Trade Tariff on 30 September 2026, heading 3907 covers specified resins in primary forms. Its thermoplastic liquid crystal aromatic polyester copolymer line, 3907 99 05 00, carries 0% duty for goods from China. The supplied tariff record lists no anti-dumping or countervailing measure and no suspension for this line.

The tariff attaches import and export waste controls. For a China-to-England shipment of waste subject to notification controls, the exporter must apply to the Chinese competent authority for consent. Confirm the applicable waste route and requirements with your customs broker before shipping; do not treat a description such as recycled pellets as resolving waste status.

The table shows buying specifications within the same tariff line. Confirm the polymer chemistry and complete formulation against the commodity code, particularly for reinforced compounds or blends. See the wider resin guide for other products within the heading.

Specify the polymer and moulding behaviour

Name the actual producer and grade, aromatic polyester chemistry, virgin or recycled status, reinforcement type and content, colour and intended process. Agree moisture, flow, mechanical and thermal acceptance criteria with test methods and specimen preparation. Record the supplier's drying and processing instructions, rather than transferring settings from another resin.

For thin connector housings, trial filling, weld lines, dimensional stability and warpage in your own mould. For parts exposed to soldering heat, agree a trial using the intended assembly process. Request a batch certificate of analysis and retain an approved sample.

Ask HSE to confirm the UK REACH registration position for the polymer, its monomers and other substances it contains, including whether any exemption or existing supply-chain registration applies. Ask for a written compliance position covering the exact formulation, including additives.

Worked duty example

Illustrative example, not a quote: Illustrative production trial consignment of liquid crystal polymer resin pellets under 3907 99 05 00, invoiced at £18,000 free on board, with £2,000 of freight and insurance to the UK. The customs value is £20,000. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £20,000, so it is £4,000. 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 labels to the order and certificate of analysis; investigate substituted grades.

Composition: compare reinforcement and additive declarations with the approved formulation; use independent analysis where identity or filler content is disputed.

Pellets and packing: check for mixed colours, black specks, excessive fines, damaged liners and broken seals; retain samples from the delivered batches.

Processing: dry and mould samples using the agreed procedure, then compare filling, warpage and part dimensions with the approved trial. Arrange quality inspection around these checks.

What goes wrong

A material sold as an equivalent can fill the mould differently or produce weaker weld lines. Changes in reinforcement, flow behaviour or recycled content can alter shrinkage and warpage. A satisfactory pellet appearance does not establish that the finished connector will survive assembly.

Keep the producer's grade and formulation fixed in the purchase specification. Investigate unexpected processing behaviour before releasing the batch, and compare the delivered material with retained samples rather than relying only on a generic data sheet.

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.