Zoltek Introduces Low-Cost Solution for Winding CNG Tanks

Zoltek have introduced TowPreg, a pre-impregnated carbon fibre tow material specifically formulated for improved efficiency in filament winding compressed natural gas (CNG) tanks and other pressurised vessels.

The material construction of the new TowPreg reduces production costs for pressure vessel applications by pre-impregnating Panex 35 carbon fibre tow with a thermosetting Bisphenol A epoxy resin. The impregnated tow has been spooled at a consistent bandwith so it is ready to wind as soon as it is tied into the part.

Filament winders can expect greater fibre placement control due to increased tack of the TowPreg, leading to increased design freedom and more accurate burst pressure predictions. Other benefits include: faster winding speeds due to exceptional fibre placement control, eliminating resin bath limitations, cleaner operations, and eliminated resin waste. Additionally, the material may be stored at room temperature for up to three months, simplifying logistics and facility requirements.

Zoltek will initially focus on CNG Tanks as the primary application for this new material, however sporting goods, automotive structures, boat masts, and any filament wound composite part requiring low-temperature cure will benefit from its unique properties.

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