Glass Fiber Liner

Published: June 26, 2020 | Last updated: July 5, 2023

What Does Glass Fiber Liner Mean?

Glass fiber liner is a composite material, the main component is made of very fine glass fibers saturated in polyester resin. It is cured-in-place using ultraviolet (UV) curing for a strong, long-lasting application.

Glass fibers combined with thin felt layers have shown to have the best mechanical properties and yields between four to nine times higher values than the minimum flexural modulus value specified in the American Society for Testing and Materials (ASTM) F1216.

Glass fiber liner is also known as fiberglass liner or glass-reinforced plastic/ polyester (GRP) liner.


Trenchlesspedia Explains Glass Fiber Liner

Glass fiber liner for cured-in-place pipe (CIPP) was mainly developed for ultraviolet light cure as UV light has limited wave penetration. Glass fibers mixed with traditional CIPP liners can reduce the thickness of the CIPP liner by 30%. When combined with unsaturated polyester resins, these fibers show high structural strength; even when mixed with traditional CIPP liners.

The liner is produced in a plant where consistent manufacturing quality is ensured. The liners have glass layers with a series of foils and barriers forming a dual-sided fully encapsulated liner.

UV cured CIPP is considered to be at least 3 times stronger than other available CIPP products and have a greater service life, up to 80 years. It is considered strong enough to hold as a viable pipe even if the outer host pipe has completely deteriorated.

For the installation of these liners, the impregnated liner is pulled into the pipe through manholes or entry pits using a winch and the pull-in-place method. Video inspection is undertaken to ensure that there are no wrinkles in the liner. A UV light train is then pulled through the pipe to cure it.



Fiberglass Liner

Glass-reinforced Plastic/ Polyester (GRP) Liner

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