Importing polycarbonate sheet from China fails on documents and tolerance control, not on unit price. A first-time importer ordered a full container of 6 mm clear polycarbonate from an agent, paid 30 per cent deposit, and received 41 pallets of sheet that measured 5.6 mm at the edges and carried no UV statement. The saving on the unit price disappeared in one claim.
Buying polycarbonate sheet from China is a normal sourcing decision. What makes it fail is treating a commodity product as if grade and thickness were guaranteed by the price.
Documents for polycarbonate sheet from China
A factory controls the extrusion line, the UV co-extrusion and the thickness tolerance. A trader controls neither and buys from whichever line is available that week. An agent controls nothing and adds a margin.
For a repeat programme, buy from a factory that will name the line and hold the grade. For a one-off trial, a trader can be adequate if the documents are complete, but the risk of grade substitution is higher.
The four documents to request before a deposit
- Grade data sheet naming the UV method, the impact grade and the thickness tolerance band.
- A test report or yellow card reference for flame retardant grades, if applicable.
- A packing specification with pallet dimensions, interleaving and edge protection.
- A proforma invoice that states Incoterm, port, lead time and the tolerance in writing.
Sample first, then a trial order, then a container
A sample proves appearance and grade. A trial order of ten to twenty panels proves cutting, packing and the supplier ability to hit a thickness band across a batch. A container proves logistics. Skipping the middle step is the most common way importers discover a tolerance problem at full scale.
Measure the trial panels at nine points each, not at the edge. Polycarbonate sheet is often slightly thinner at the edge after trimming, and an edge measurement flatters a loose tolerance.
Payment structure that keeps leverage
A 30/70 structure is normal. A 100 per cent advance to a new supplier is not. Where the order is large, a 30 per cent deposit, 60 per cent against the bill of lading and 10 per cent after arrival inspection keeps the final inspection meaningful.
Keep the inspection clause in the proforma invoice. A clause that says quality to be confirmed on arrival, with photos and measurements required before the balance, changes how the goods are packed.
Loading, film and the damage that happens in transit
Polycarbonate should travel vertically or in a well-supported stack with interleaving, and the protective film should stay on until installation. Film that has been on the sheet through a hot container for six weeks can become difficult to remove, and removal takes adhesive with it.
Ask for the loading plan with photographs before the container is sealed. A supplier who photographs the load is a supplier who expects to be checked.
The import side, including duty, HS code and customs documents, is covered in the polycarbonate sheet import guide; the backing and film questions in export packing and shipping.
Red flags that repeat
A price far below the market with no grade stated, a data sheet with no thickness reference, a supplier who cannot name the UV method, and a refusal to photograph the load. Any two of those together justify walking away.
River People extrudes and supplies polycarbonate sheet with the grade, UV method and tolerance written on the proforma invoice, and photographs each load before sealing.
Send the specification, annual volume and destination port to oversales@rpplexiglass.com and we will quote as a polycarbonate sheet China supplier with grade documents and a loading plan included.
Frequently Asked Questions
How do I verify a polycarbonate sheet China supplier?
Ask for the grade data sheet naming the UV method and tolerance, a trial order measured at nine points per panel, and photographs of the load before the container is sealed.
What is a normal deposit for a container order?
Thirty per cent deposit with the balance against the bill of lading is common. Retaining a final ten per cent until arrival inspection gives the inspection clause real weight.
Why is the sheet thinner than ordered?
Because the tolerance band was never written into the contract. Polycarbonate is often supplied at the low end of a wide band; specify the minimum acceptable thickness and measure at nine points on arrival.