Longitudinal cracking or splitting
Likely cause: Poor wet-out, excessive pull force or machining damage
Evidence: Cut-section review, visual acceptance standard and mechanical test
China FRP process guide
FRP pultrusion
Pultrusion continuously pulls aligned reinforcement through resin impregnation and a heated die to produce constant-cross-section FRP profiles. The method is efficient for structural angles, channels, beams, tubes, rods and cable-management sections, but properties are strongly directional and the approved laminate architecture must remain tied to the drawing.
When this process fits
- Constant-section structural profiles
- High longitudinal strength and stiffness
- Repeat production with stable tooling
- Corrosion-resistant platforms, ladders and supports
Process controls a buyer can audit
| Control field | Factory control | Buyer evidence |
|---|---|---|
| Reinforcement architecture | Roving, continuous mat, veil and local inserts by weight or placement | Approved laminate schedule and glass/resin content test |
| Resin system | Polyester, vinyl ester, epoxy or polyurethane with defined additives | Resin grade, batch traceability and cure evidence |
| Die and line settings | Temperature zones, pull speed and pull force | Recorded setup plus dimensional and cure checks |
| Secondary operations | Cutting, drilling, CNC, bonding and sealing | Drawing revision, edge treatment and hole inspection |
Common failure modes
Surface fiber exposure
Likely cause: Veil loss, resin starvation or die contamination
Evidence: Approved appearance sample and inspection photographs
Warp, twist or dimensional drift
Likely cause: Uneven cure, die wear or unsupported cooling
Evidence: Straightness/twist plan and sampled dimensional report
RFQ inputs before supplier matching
- 01Profile drawing and revision
- 02Design loads and controlling standard
- 03Resin/fire/UV/corrosion requirements
- 04Color and surface veil
- 05Cut/drill/CNC operations
- 06Order length, bundle and export packaging
Missing inputs should be recorded as deviations, not silently filled with a factory default.
Related product families
Pultruded FRP Profiles
Source standard and custom pultruded FRP structural profiles from Chinese manufacturers with published resin, reinforcement, tolerance and EN 13706 capability evidence.
Open product evidenceFRP Grating
Compare Chinese manufacturers of molded and pultruded FRP grating by resin system, panel geometry, fire performance, public company profile and production cluster.
Open product evidenceFRP Rebar
Find Chinese GFRP and BFRP rebar manufacturers by bar diameter, surface, tensile evidence, ACI 440 test basis, capacity and export readiness.
Open product evidenceMatch the process, then the factory.
Send the product definition and required evidence. GetFRP will return process-fit suppliers and identify open controls.
Submit controlled RFQ