The towel becomes "stone" and what happened?

February 11, 2020

Caller content: I have a question. Every time I buy a towel, I pick it all in cotton, but every time I buy a new towel, it doesn't take long. After drying, it becomes very hard. It is straight and dry. When I used the towel, it felt a little slippery, didn't absorb water, and was quickly scrapped. What exactly is going on?

The reporter consulted the teachers of several schools for this purpose. It was learned that the towel became "stone" and it was a compound of high-grade fatty acids or higher fatty acids that were insoluble in water. There were two reasons for this: the first one, Ms. Zou The family wiped the sweat on the face and body with a dry towel, and when the cleaning was not timely, there would be a sour sweat smell on the towel. After washing several times, the towel became very hard to dry. Sweat leaves sweat on the towel. After the soap is cleaned, the sweat will chemically react with the main ingredients of the soap, which in turn will produce higher fatty acids. Another possibility is that the tap water used by Ms. Zou is relatively high in iron, calcium, magnesium and other minerals. When washed with soap, it will produce higher fatty acid compounds. To solve this problem, you can soak the towel with hot water, choose a synthetic detergent such as detergent or detergent, and the towel will restore water absorption.

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