Sourcing bicomponent polyester fibres from China

Zero duty, with composition checks

Read from the UK Trade Tariff on 1 October 2026, heading 5503 covers synthetic staple fibres not carded, combed or otherwise processed for spinning. The relevant supplied lines carry 0% duty for goods from China, with no listed anti-dumping or countervailing duties, suspensions or attached import controls. See the wider polyester staple fibre guide.

The table repeats the polyester line for alternative constructions. The separate polyethylene-encapsulated polyester-core line applies only to its full tariff specification, including linear density, cut length, elongation and tenacity. A polyester core alone does not establish the polyester code. Ask your broker to check the complete polymer composition and supplied processing state using our commodity code guide.

Specify the core, sheath and bonding behaviour

Name the polymer in each component, their proportions and whether the structure is core-and-sheath or side-by-side. Distinguish an all-polyester construction from a polyethylene sheath around a polyester core. Agree linear density, cut length, crimp, finish, colour, tenacity, elongation, moisture and recycled content, with acceptance tolerances recorded against an approved sample.

For thermal bonding, agree the sheath melting behaviour and trial the fibre in your intended blend and heating process. Check bond strength, loft retention and shrinkage after cooling. For domestic upholstered furniture filling, confirm applicable fire-safety and ignitability-testing requirements with Trading Standards; obtain a report covering the supplied fibre for any agreed testing. Agree the testing scope through testing and certification.

Worked duty example

Illustrative example, not a quote: Trial consignment of all-polyester bicomponent staple fibres, illustrative only under 5503 20 00 00, invoiced at £3,000 free on board, with £1,200 of freight and insurance to the UK. The customs value is £4,200. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £4,200, so it is £840. 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

Composition: check component identities and proportions against the approved specification and confirm that batch documents describe the actual construction.

Bonding: check melting behaviour, bond strength and loft after a trial using your intended blend and heating conditions.

Fibre consistency: sample across bales for linear density, cut length, crimp, finish and contamination; check opening and carding behaviour.

Arrival: check bale identity, wrapping, net weight, moisture, odour and recovery after opening. Keep samples linked to each batch; see quality inspection explained.

What goes wrong

A changed sheath polymer or uneven component distribution can alter bonding behaviour. Fibre may remain loosely bonded or collapse during heating. Excess finish, inconsistent cut length and clumps can disrupt opening and carding. Approve a process trial before accepting a substitute grade.

Damp bales, colour specks and foreign fibres can make otherwise usable fibre unsuitable for the intended product. A report for another grade does not establish the performance of the supplied batch. Keep disputed bales separate and compare retained samples, batch records and trial results before using them.

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.