Quik-Coating Resin Mixing

“A competitor told me that your coating system can’t work as it does not employ a static mixer to mix the 2 parts of resin. He also said there would be no reason to weigh the resin before application and after as the resin is pre-mixed before applying. Do you have an answer or is he correct?”

No he’s not correct. Here’s the reason why. There are two ways to mix any components. One is active mixing and the other is static mixing. Here’s the difference between the two methods. Active mixers blend 2 or more components of a material by stirring the components you are trying to mix. Static mixing involves taking the components and pushing them through a non-moving mixer or static mixer indicating that the mixer is fixed and doesn’t move.

Whoever told you this was not schooled in mixing. If you think about it, how many painters mix paint by pushing the paint through a static mixer or do they stir it with drill and mixing bits or a paint shaker which again is an active mixer. For those of you who perform CIPP lateral lining, I’m betting that near 100% of you use active mixers. In other words, a drill and mixing bit stirring a 5 gallon pail of resin to mix the components together. I’ve performed this method for over 20 years and properly executed have over 1,000,000 of liner in the ground that was mixed that way. In those 20+ years I’ve never had a failure provided I’ve followed the manufacturers recommendation of mixing.

Our coating process uses the same active mixing as described in the mixing bit scenario with the difference being we’re using a brush spinning at a high speed to mix the materials. This method is much more efficient in applying coating than pre-mixing the resin through a static mixer. Once you mix the resin, any mixed resin must be used or disposed of if not used for the application. In the case of pushing the mixed resin down a single tube, any resin left in the tube that transports it to a delivery point must be tossed. That means the cost of the tube as well as the cost of the resin becomes a cost to the process. If you patch a pipe that requires 10’ of repair with 6 coats of resin, you would throw away 6 sets of hoses and all of the resin left in the hoses from each application.

In regard to the weighing process of the resin used before and after, without weighing how much you apply by weighing before application and after means you’re guessing at the amount of resin you’ve applied. If the design thickness calls for 3mm of resin, you won’t know unless you measure the actual amount applied. In the case of pre-mixing, you’d have to weigh the empty tubes, weigh the tubes you throw away with resin in them and then deduct the new resin weight from the amount of resin you mixed to start with. A much more complicated and costly solution to figuring out how much you’ve applied.

Finally, the is a standard IGC 351-18 prescribing the methodology of coating sanitary sewer pipe. If the material has not passed the testing for the standard, you are applying a material not designed for the problem you are trying to fix if it’s a sanitary sewer. For more information contact us at 888-354-6464 or info@pipeliningsupply.com

The WWETT Show is speeding toward us quickly. If you are attending, be sure to register. John Heisler will be presenting this year the AIPPR coating process as the standard set by IAPMO in the UPC. Booth 6722

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Pipe Lining Supply is pleased to offer a fully customizable drain cleaning, coating & lateral lining MICROSHOP on wheels!

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