Once upon a time worked for a WW utility... The CIPP I have seen uses fiberglass liners saturated with ordinary "polyester"-type resin and inverted into the pipe by filling them with water, then cured by heating the water inside the lined pipe (not steam). The water doesn't directly contact resin, there is an impermeable bag/film which is what allows the liner to be wet with resin and then pressed into the pipe with water pressure inside. I suppose I am not quite clear what would be emitting airborne particulate polymers in this type of system in the first place or where from. I have heard of systems that inflate liners with steam, but how is steam even directly in contact with resin?
There are fumes, but that's mostly just styrene solvent/monomer evaporating from the resin while handling it. It's the same situation as any fiberglass work or composite that uses that type of resin system. If fumes from this resin are polymerizing into nanoparticles, then wouldn't this have bad ramifications for ALL fiberglass/polyester composite works, bondo, and tons of other products used all over the world doing the same during curing?
torukmakto4 t1_irh060a wrote
Reply to Widely used sewer pipe repair technology creates and emits nanoplastics into the air by ajwhelton
Once upon a time worked for a WW utility... The CIPP I have seen uses fiberglass liners saturated with ordinary "polyester"-type resin and inverted into the pipe by filling them with water, then cured by heating the water inside the lined pipe (not steam). The water doesn't directly contact resin, there is an impermeable bag/film which is what allows the liner to be wet with resin and then pressed into the pipe with water pressure inside. I suppose I am not quite clear what would be emitting airborne particulate polymers in this type of system in the first place or where from. I have heard of systems that inflate liners with steam, but how is steam even directly in contact with resin?
There are fumes, but that's mostly just styrene solvent/monomer evaporating from the resin while handling it. It's the same situation as any fiberglass work or composite that uses that type of resin system. If fumes from this resin are polymerizing into nanoparticles, then wouldn't this have bad ramifications for ALL fiberglass/polyester composite works, bondo, and tons of other products used all over the world doing the same during curing?