Recently more consumers hang and dry their laundries indoor for various reasons. Under these slow drying conditions malodor was sometimes generated. Gas chromatography analysis showed the odorants were composed of medium-chain alcohols, medium-chain aldehydes, ketones, fatty acids, N-compounds and S-compounds. Especially, medium-chain fatty acids were confirmed to make up a characteristic and striking sweaty and sour odor. The malodor is supposed to be formed from sebum and soils by oxidative degradation as well as by metabolism of microorganisms. This study shows that a laundry detergent with an enzyme possessing high protease as well as bacteriolytic activity can prevent washed clothes from malodor generation during such a prolonged drying.
Some of proteases are added in detergent compounds for removing soil effectively. We focused our attention on bacteriolytic activity of detergent proteases, and found out the superior protease. Its bacteriolytic activity proved to be enhanced with alkaline and calcium binding agents. We thought that it remove microorganisms on garments as well as soil and prevent these microbial metabolism like malodor generation.
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