Flexible knitted reinforcement

Flexible knitted reinforcement for complex shapes Syncoflex (from Syncoglas), provides a regular strength distribution across the whole surface (virtually equal values in all directions). The reinforcement has many holes allowing quick and thorough wetting out. 

The flexible, tubular hner of a CIPP is typically made of polyester fabric that is a needled, woven or knitted reinforced fibre sheet using carbon, glass or aramid fibres or a combination of both. Depending on its application, the hner is coated with an impervious film such as polyethylene for the transport of drinking water or polyester for gas pipes. Other coatings include urethane and polyvinyl chloride (PVC). The final smooth surface reduces the surface friction and provides an additional corrosion barrier for the pipe. Liner tube sizes range from 100 to 2500 mm in diameter with... 

In addition to being available as continuous filaments and staple fibers in mats, fiberglass textiles are also available as biaxial, triaxial, knitted and three dimensional braided patterns. Many different resin matrices are in use but the emphasis in this chapter will be on unsaturated polyester and epoxy resins. While the strength and stiffness are controlled primarily by the reinforcements, the resinous matrix contributes to thermal conductivity and flexibility. The ultimate properties of these composites are based on a harmonious contribution of both the continuous and discontinuous phases. 

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