Patent ID: 7553807
Filing Date: 2009-06-30
Classification: C11D

Abstract:
1. A clothes washing method characterized by washing with a washing liquid obtained by dissolving in water a detergent composition that does not include a surface active agent, but includes, as a substantial active component for detergency, a washing component comprising: A) an alkaline inorganic salt selected from the group consisting of: B) an anti-soil redeposition component that prevents resoiling of hydrophilic fibers and hydrophobic fibers when coexisting with said inorganic salt, which is a water-soluble polymer substance of a non-ionic system including at least one species selected from the group consisting of an acetyl group, methoxy group, hydroxypropyl group, and poly-oxy propylene group as the hydrophobic group, and including a hydroxyl group as the hydrophilic group; wherein the detergent composition has a pH between 9.5 and 11, is dissolved in a concentration of 0.5 to 5 g/L to form the washing liquid, and through the existence of said anti-soil redeposition component, has surface tension of 58 dyne/cm or less.