Abstract
Zeolite has been partly substituted for sodium tripolyphosphate (STPP) since 1980 and possibly over 85% of commercially available synthetic detergents have excluded STPP since the end of 1983.
In this study, the contribution of Zeolite to detergent washing capacity was studied to gain an understanding of anti-redeposition effects.
Anti-redeposition effects were studied by examining under various conditions the action of suds containing Fe2O3 on soiling polyester fabrics at different calcium ion concentrations.
The anti-redeposition effects of Zeolites were found to be rather low, compared to STPP or a binary system of STPP and Zeolite. The effects of Zeolite became gradually higher with an increase in sud concentration.
Anti-redeposition effects became more pronounced as the Ca binding capacity increased.
