An epoxy system for wet filament wound pressure vessel

The aim of this study was to develop an epoxy material, being suitable as matrix system for the case of inner pressure vessels with polyethylene as inner lining for water treatment with wet filament winding technique. For this purpose, a new kind of epoxy curing agent was synthesized in our lab. The examinations of viscosity, mechanical properties, pot life, curing behavior, fatigue resistance and blast strength of the epoxy system were performed. The results showed that the epoxy system has longer gel time (≥4h) and lower viscosity (≤1.0Pas) at room temperature, and it can gel and cure at lower temperature. So, the composite vessel has good mechanical properties and fatigue properties, higher blast strength, low cost, and the higher strength conversion rate of cycle fiber reaches as high as 79.8%. The experimental results proved that the epoxy composite system was very suitable for use in the equipment for water treatment.