Dispensing two-part adhesive formulations easily and conveniently is a considerable challenge. Two-part packages such as double-barrelled syringes are a traditional approach, but they are inherently unsealed, and can suffer from sticking of pistons and variation in mixing ratios. Pressure packs using bag-on-valve (BOV) technology are popular for some single-component pastes (especially cosmetics), but could this approach be extended to two-component
While working at Loctite, I was the lead inventor on work (later patented
) showing that using modified valve pedestals and a static mixing actuator indeed enables BOV technology to be applied to two bags rather than just one. The result is a dispenser that is convenient and novel, as well as providing effective sealing of the components.