Fiber Sizing Compounds
The Right Sizing Starts With the Right Chemistry
Sizing is the difference between fiber and finished performance. Our formulations bond, protect, and prepare glass, carbon, and aramid fiber for the resin systems they're built to reinforce.
From film-forming polymers to coupling agents, every Phlex sizing compound is engineered to match your process line and end-use requirements.
The material utilizes repurposed carbon fibers and is produced in Lake City, South Carolina.
Not Sure Which Sizing Fits Your Resin System?
That's where our team comes in.
Phlex offers sizing for unique resin systems including PA66, PEEK, PEKK and epoxy, backed by expertise to help you choose the right size for your resin system.
Rather than navigating the available chemistries on your own, talk to us about the resin system you're working with and explore which Phlexsize option aligns with your needs.
Explore the Phlexsize Offering
| Product | Chemistry | Properties |
|---|---|---|
| U-361 | Polyurethane Dispersion | 60% solids; no free isocyanates; excellent for carbon, glass and basalt fibers |
| ES-55 | Epoxy Dispersion | High-MW epoxy dispersion ideal for carbon fiber; broad thermoplastic compatibility |
| WBP-35S | Phenoxy Dispersion | High-MW phenoxy resin for glass and basalt fibers; strong thermoplastic compatibility |
| UPW-36 | UPR Dispersion | 36% solids UPR dispersion engineered for thermoset composites; excellent wet-out in styrene and epoxy |
| LS-01 | Lubricant | Nonionic polymer lubricant that reduces friction, fuzz and breakage; dual solubility |
| WBP-35XL | Self-Crosslinking Phenoxy | Self-reacting phenoxy dispersion for improved cross-link density and multi-resin compatibility |
| ES-55XL | Self-Crosslinking Epoxy | High-MW epoxy with enhanced cross-linking for advanced composite systems |
| WBP-25HP | Modified Polymer | Designed for polypropylene and olefinic matrices; improves fiber bond strength |
| WBP-35PK | High-Temp Phenoxy | Engineered for high Tg and high-heat composite and coating applications |
Let's Find the Right Fit
With different fibers, resin systems and composite requirements to consider, choosing a sizing compound can be highly specific to what you're working with.
Tell our team about your resin system and what you're looking for. We can help you explore the available Phlexsize Carbon Fiber Sizing options and identify the sizing that fits your needs.
Frequently asked questions
The best sizing depends on the fiber type, resin chemistry, processing conditions, and desired composite performance. PhlexTek offers polyurethane, epoxy, phenoxy, polyester, self-crosslinking, high-temperature, lubricant, and modified-polymer technologies, and can help match the appropriate sizing chemistry to your specific application.er?
Do you have more question?
If you have more questions, feel free to reach out to us anytime!
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