What Does Ultraviolet Light Curing System Mean?
An ultraviolet (UV) light curing system consists of special equipment such as a light train and supporting equipment to cure resin-coated liners used for trenchless rehabilitation of sewers. Other equipment in the UV curing system includes a truck with a conveyor unit and a telescoping boom winch to pull the liner into place, equipment to inflate the resin-impregnated tube with air, and a CCTV camera for pre-cure inspection.
The curing takes place with the help of a photochemical process that utilizes high-intensity UV light to quickly dry resin-coated cured-in-place (CIPP) liners. UV light curing is considered to give superior results than heat and steam curing.
Trenchlesspedia Explains Ultraviolet Light Curing System
Different types of fabrics are used in the CIPP industry such as polyester fabric, and glass fabric. Polyester fabric has high surface tension and optimally absorbs resin. Glass fabric is preferred where curing is done using UV light. The liner is manufactured in a manufacturing 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 three 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.
The light train that does the curing also provides a real-time video that enables installers to provide a good fit. It also encapsulates and locks the styrene into place during the curing process preventing its release into the air or groundwater.