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product, but howitwas achieved is still to be kept secret. “It is a patented basic structure and I think itwill be awhile beforewe see similar products on themarket.” said Nicklas. To ensure quality, the product has been BASTA registered. A BASTA registered product is a guarantee for a safe and non-toxic choice ofmaterials in the buildingmaterialsmarket, in Sweden.


Thiswould seemto indicate that in the European market the lion’s share of CIPP installations is nowcompleted using UV light cured lining techniques. The UK is someway behindwith just around 37%of its CIPPmarket being UV light cure-based. These figures do not take account of anymarket share for LED or other systems installations.


Today there are several companiesmarketing light cure lining systems andmaterials.What follows is a look at some but not all of these.


MATERIAL CHANGES


Formuch of the life of CIPP as a technique there has been a drive to find the best linermaterials and resins. Today there arematerials ranging fromneedle felt through glass fibre towoven liners that often are selected because they are the cheapest or the preferred liner of the installer (or they have yet to find anything better).


As far as the resins go there has a variety of options butmost of the ones used until recently have all offered the same down-side, that of styrene odour during curing.With polyester being themain source of resin basematerials, this has led tomany complaints fromboth users and localswhilst the lining operations take place simply due to the smell.


Lately howeverwithmany authorities and governments providing guidelines and legislation that requires the removal of these noxious substances fromthe environment, there has been a drive towards reformulated resins that do awaywith the styrene base using an epoxy base.


One such example thatwas recently announced as about to hit themarket is fromInPipe in Sweden. Inpipe Freeliner as it is known is claimed to be theworld’s first fiberglass reinforced liner that is free fromboth styrene and Bisphenol A, another chemical that is on the removal list.


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“Inpipe linersmanufactured to date, use a styrene-based polyester. However, there is a polyester on themarket that is free fromstyrene butwhich is based on Bisphenol A. The new polyester thatwill be used for the Inpipe Freeliner is free fromboth styrene and Bisphenol A. This is the next step in Inpipe’s environmental thinking and something that has been requested by themarket for a long time. Inpipe Freeliner will be an important cornerstone of our expansion plan.” said Nicklas Björnvind, CEO of InPipe.


With the newInpipe Freeliner product, Nicklas expects to significantly strengthen Inpipe’s market share saying: “For a long time such an environmentally-friendly liner has been requested by both installers and stakeholders being as styrene is a priority risk reduction substance and Bisphenol A is a phase-out substance.With Inpipe Freeliner,wewill be able to help our customers fulfil this.”


The fact that themarket can nowbe offered a styrene and Bisphenol A-free liner is the fruit of a focused environmentalmindset formany years. “There are products that are styrene free on the market, butwhere the styrene has been replaced by Bisphenol A. Until now, there have been no linerswithout these substances, but that iswhat we are going to launch.” said Nicklas. “Inpipe Freelinerwill function aswith previous products in terms of fields of application and installation. Wewillmake sure that everyonewhowants to buy can do so.We are not going to exclude anyone.”


The installation itself is completed in the same way as previous liners and curing is achieved with UV light. “The product is tested and designed for 50+ years of strength. The only difference frombefore is if the installer cuts or handles the liner in anyway, this product basically smells nothing.” said Nicklas.


Inpipe’s supplier of polyester is behind the new | June 2021 | www.draintraderltd.com


“BASTA has three criteria; Basta, Beta and Risk Assessed. Our newliner falls into the Basta category. Thismeans that the product has the highest environmental class you can have. Environmental thinking has been the driving factor for Inpipe for a long time. First by reducing carbon dioxide emissions, as shaft-freemethods do, then byworkingwith UV curing that uses a small amount of energy for a short time.” said Nicklas. “This is the next step. I thinkwe owe it to future generations to think aboutwhatwe use and howwe treat our environment.”


Inpipe Freelinerwill be available as a standard liner for ordinary round pipes, but also as Flexliner for pipeswith varying dimensions. “All installers on themarketwill be offered the product.We primarily look at the Nordicmarket, which is our primary homemarket. But our customers are all over Europe and theywill also be offered the same product aswe complywith local regulations in individual countries.” commented Nicklas. Inpipe’s ambition, according to Nicklas is to continue to grow.


LIGHT CURE AVAILABILITY


Whilst UV curing systems have been around for many years as indicated previously, the past few years have seen a significant push towards smallermor portable systems that care aimed at the smaller diameter end of themarket and the smaller contractor,wheremore traditional curing techniques still proliferate butwhere the need formarket change is becoming evermore apparent.


What follows is a selection of the systems, large and small that are currently available to the market.


BKP Berolina – The Berolina-Liner Systemis a cost-effective and efficientmethod for sewer pipe rehabilitation. Time-consuming excavation work can be avoided and the disruption to infrastructure isminor and short-term. Compared with othermethods energy consumption is reduced significantly thanks to optimised production, transportation and installation conditions. Since 1997, BKP has successfully produced UV light-curing and glass fibre reinforced tube liners.


Different liner types are available tomeetmost requirements for sewers in need of rehabilitation including:


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