Sourcing polyvinyl butyral resin from China

Duty on polyvinyl butyral resin

Read from the UK Trade Tariff on 6 November 2026, heading 3905 covers vinyl polymers in primary forms. Polyvinyl butyral under 3905 99 90 81 and other primary-form grades potentially falling under 3905 99 90 99 carry 0% duty from China. Neither line records anti-dumping or countervailing duty. The repeated residual code in the table identifies different buying forms, rather than separate tariff lines.

The named resin line also records an autonomous suspension at 0.00 %. Its footnote excludes mixtures, preparations and products made up of different components containing the resin. Both relevant lines attach import and export waste controls. For recovered material from China, ask your customs broker to confirm the waste classification and applicable shipment requirements before dispatch; do the same before exporting rejected material.

Match the composition and physical form to the commodity code. The named line specifies hydroxyl content by weight from 17,5 % to 20 % and median particle size greater than 0,6 mm. Obtain supporting batch results rather than relying on a supplier's code. For related polymers, see the wider vinyl polymer guide.

Specify hydroxyl content and solution behaviour

State whether the resin is for a coating, adhesive or interlayer manufacturing process. Agree hydroxyl content, residual acetate content, solution viscosity, moisture, particle-size distribution and colour. Define the solvent, concentration and temperature used for viscosity testing so that factory and arrival results are comparable.

Ask the factory to identify plasticisers, stabilisers and other additives, and distinguish virgin resin from recovered material. Trial the proposed grade in your own formulation and retain an approved sample. Buying resin for interlayer manufacture calls for a resin specification and process trial, rather than acceptance of a finished interlayer sample alone.

Confirm with HSE whether polymers are exempt from UK REACH registration and whether monomer registration requirements or thresholds apply to your material. Everyone in the supply chain must ensure chemicals are correctly labelled and packaged before sale. A safety data sheet is required when a hazardous chemical is supplied for workplace use.

Worked duty example

Illustrative example, not a quote: Illustrative order: 20 tonnes of other polyvinyl butyral resin in sealed bags under 3905 99 90 99, invoiced at £18,000 free on board, with £2,500 of freight and insurance to the UK. The customs value is £20,500. Duty at 0% is £0. Import VAT at 20% is charged on the customs value plus duty, £20,500, so it is £4,100. 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 the bag label, resin grade, batch number and analysis certificate; verify declared hydroxyl and residual acetate content.

Viscosity: test arrival samples using the agreed solvent and method, and compare dissolution behaviour with the approved sample.

Moisture and contamination: measure moisture and inspect for damp clumps, foreign particles, discolouration and insoluble residue.

Packing: check seals, inner liners and pallet condition; photograph wet or damaged bags and keep samples traceable to each batch. Set the sampling brief using our inspection guide.

What goes wrong

A substitute grade can carry the same resin name while producing different viscosity or dissolution behaviour. Damp bags, contamination and undeclared additives can also upset the buyer's formulation. Hold affected batches apart, compare them with retained samples and request a documented investigation before using the material.

Recovered resin needs particular attention to composition, contamination and waste status. Waste shipment requirements depend on the material and route; confirm the requirements for dispatch, transit and destination countries. Do not arrange a return shipment solely on the basis of the original resin commodity code.

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.