This in‑depth 2026 guide profiles ten leading PVC free foam board manufacturers in China and explains how to evaluate suppliers on certification, capacity, QC and OEM support. It highlights Shanghai Gokai’s flexible, R&D‑driven service for SMEs, outlines hidden sourcing risks like density downgrading and fake certificates, and provides a practical buyer’s checklist covering sampling, verification and logistics to help procurement managers build stable, compliant long‑term partnerships.