St Paul, Minnesota – New two-part polyurethane adhesives from HB Fuller Co. for spiral wound membrane bonding — UR3577 and UR3577LV — have been certified by NSF International as meeting NSF to NSF/ANSI Standard 61 – Drinking Water System Components – Health Effects.
These adhesives have also been tested and certified by NSF to NSF/ANSI 61, Annex G and comply with California's Health & Safety Code Section 116875 (commonly known as AB1953) and Vermont Act 193.
Adhesive producer HB Fuller says customers can be confident that the new NSF certified adhesives have been tested and meet this important criterion for filter manufacturing
The group claims to have been a leading supplier for spiral wound membrane bonding for liquid filtration applications for more than 20 years.
As a result, "UR3577 products incorporate years of filtration innovation experience into the formulations that are designed to reduce leak test failures in spiral wound membrane bonding," the company said.
The LV type is a low viscosity version that HB Fuller says "gravity feeds very well for equipment that requires this set up." Both versions have a 1:1 mix ratio and can be used for most water filtration spiral wound membrane applications including reverse osmosis, nano-filtration, and ultrafiltration.