Relentless Pursuit of Cleaning and Hygiene Technologies for Detergents

Fabric Care

A biofilm is a complex of bacteria and extracellular polymeric substances (EPS) containing polysaccharides and proteins that the bacteria secrete (Figure 1).

Observation with a confocal laser microscope. In an image of biofilms formed on textile, EPS (polysaccharides) is shown in blue, stained bacteria are shown in green and red, and the textile is shown in white. The biofilm is a complex of bacteria enclosed in extracellular polymeric substances (or EPS) made of polysaccharides, proteins, and other substances the bacteria secrete.

Figure 1

It is known that biofilms are present on towels and other kinds of fabric, and are related to odors and dullness that washing with antibacterial or disinfectant detergents cannot remove. Biofilms are difficult to remove by ordinary washing, by using a bleaching agent, or by boiling or heating by other means.
Kao has previously developed various technologies for inhibiting or removing biofilms, but found difficulty in removing biofilms that could not be eliminated completely and have subsequently built up and expanded.

Endeavoring to solve this problem, Kao focused on the structure of EPS in biofilms and developed a cleaning technology to remove EPS by combining Bio IOS®, an anionic surfactant developed in house, and a certain other surfactant. This new cleaning system loosens the structure of EPS and allows the surfactants to penetrate into biofilms and thoroughly wash the fabric, removing biofilms much better than before.

You will find this technology for removing biofilms highly effective in removing odors and dullness that washing could not do before. And we will keep contributing to more pleasant living by striving to solve concerns about washing.

Effect of removing biofilms on actually used clothing. Three images are shown, comparing the effect of removing biofilms among no washing, a conventional formulation, and a formulation using the new technology. Stained bacteria are shown in green, EPS (polysaccharides) is shown in blue, and the textile is shown in white. While the effect of the conventional formulation is almost the same as no washing, the formulation using the new technology has reduced both bacteria and EPS.

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