Static mixers vary in mixing performance and pressure drop (back pressure) depending on the dimensions, number of elements and the mixer design.
Use a static mixer with an adequate number of mixer elements and the lowest backpressure to minimize off ratio dispensing. Talk to your adhesive supplier as mixer design requirements vary depending on the adhesive flow properties.
Partially blocked static mixers or cartridge outlets can also have a negative effect on the cure.
Check for crystallized or cured adhesive at the outlet before re-attaching a new tip to a previously used cartridge.
