Introduction
China has become one of the world’s largest carbon fiber producers. For overseas buyers, sourcing carbon fiber and its composites (prepreg, fabric, tow) from China offers both cost advantages and access to rapidly expanding capacity. However, carbon fiber grades are complex and prepreg demands strict cold-chain logistics. Buyers must define technical specs, quality documents, and delivery terms before ordering. This guide walks overseas procurement teams through the key steps and common pitfalls of buying carbon fiber from China.
1. Know the Product Forms
- Carbon fiber tow/roving: classified by tow size — 1K, 3K, 6K, 12K, 24K (K = thousand filaments).
- Carbon fiber fabric: plain, twill, or satin weave; common areal weights 200/300/400 gsm.
- Carbon fiber prepreg: resin-impregnated semi-product that must be frozen at -18°C; distinguished by resin system (epoxy, BMI, phenolic) and cure temperature.
2. Define Critical Specs Up Front
- Strength grades: T300 (standard modulus), T700 (intermediate), T800 (high strength), T1000 (ultra high).
- Tensile strength & modulus: specify GPa values and test standard (e.g., ISO 10618).
- Prepreg parameters: resin content (e.g., 35±3%), cure temperature (120°C/180°C), gel time, shelf life.
- Width & roll length: fabric often 1000/1270 mm; prepreg commonly 300/600 mm.
3. Understand China’s Industry Clusters
- Jilin: major base for precursor and carbonization capacity.
- Jiangsu & Shandong: concentrated prepreg and composite manufacturers.
- Shanghai & Yangtze Delta: mature high-end composite and aerospace supply chain.
4. MOQ and Lead Time
- Fabric & tow: MOQ typically tens to hundreds of kg; standard items 2–4 weeks.
- Prepreg: higher MOQ due to formulation; lead time 4–8 weeks; allow extra time for cold-chain prep.
5. Don’t Skip Quality Documents
- Each batch ships with COA and MTC.
- Aerospace/medical use may require supplier certifications such as AS9100, NADCAP (as qualification references).
- Third-party test reports (e.g., SGS) help acceptance.
6. Cold-Chain Logistics for Prepreg
- Prepreg must be shipped frozen at -18°C with dry ice, complying with IATA temperature-controlled rules.
- Ensure cold storage at destination to avoid thawing that degrades resin.
7. Payment and Trade Terms
- Common: T/T deposit + balance, or L/C at sight.
- Incoterms: new buyers use CIF/CFR (seller arranges freight); switch to FOB once familiar.
8. Customs & Compliance
- Carbon fiber products often fall under HS 6815.99; confirm destination duty and certifications.
- Watch dual-use and export-control updates; high-grade aerospace material may be restricted.
9. Common Pitfalls for Overseas Buyers
- Quoting only grade name without measured parameters → inconsistent batches.
- Ignoring prepreg cold chain → material arrives thawed/degraded.
- Using generic trade terms for temperature-sensitive goods → unclear logistics responsibility.
- No agreed acceptance standard or re-inspection right → hard to prove disputes.
10. Pre-Order Checklist
- [ ] Form (tow/fabric/prepreg) and grade
- [ ] Strength grade and measured parameters (with test standard)
- [ ] Areal weight / width / roll length
- [ ] Prepreg resin system, cure temp, shelf life
- [ ] Quality docs (COA/MTC/third-party report)
- [ ] Cold-chain & packaging plan
- [ ] Payment & trade terms
- [ ] Acceptance & re-inspection clause
Conclusion
Sourcing carbon fiber from China comes down to “specs first, documents complete, cold chain right.” Writing technical specs and quality documents into the contract protects delivery quality better than price comparison alone.
Leave a Reply