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Liner used for pipe rehabilitation has advanced beyond the basic polyester felt. Over time the Cured In Place Pipe method had a demand for liners to provide additional characteristics beyond traditional felt. Layered hybrid felts using fiberglass and polyester began to be used to meet this need. The cost of raw materials for the three main constituents used in CIPP are polyester, fiberglass and resin and each has experienced significant price increases. During this same time, many municipalities are experiencing an increase in the number of rehabilitation projects for aging underground infrastructure. Balancing the give and take between low priced materials and engineering requirements is a challenge.

The distinctive qualities of homogenously blended hybrid felt removes bulky layers creating a thinner liner without sacrificing strength characteristics. Third party testing and cost analysis revealed reduced resin usage while maintaining comparable strength of homogenously blended hybrid felt over traditional felt. Homogenously blended hybrid felt works with all forms of CIPP cure methods, UV, steam, and hot water and readily accepts common coatings for seamed and sealed tubes.

In the future homogenously blended hybrid felt could include green sustainability using recovered glass from decommissioned wind blades. Read more about the expanding capabilities of liners for pipe rehabilitation projects.