Towels make us a necessity in daily life. We have all encountered this problem. It is that the towel will harden after a long time, and why will the towel harden? Many people may be confused. Next, Xiaobian will come to answer for everyone why the towel will harden?
A soft towel, after a long time, will become dry and hard. What is going on? In our domestic water, there are many kinds of minerals, including calcium, magnesium and salt. The water is called hard water. Tap water, river water and well water are all natural hard water. The main component of the soap for face washing, when dissolved in water, combines with calcium and magnesium to form a water-insoluble precipitate. Over time, these deposits will accumulate a little bit in the middle of the fiber, making the towel dry and hard. Washing clothes with hard water for a long time, white shirts will turn yellow and hard, which is also the reason. Put a hard towel into alkaline water or vinegar water to make the sediment fall off and the towel will soften again.
Most of the towels are woven from cotton threads. The twist of the yarn (in other words, the number of turns of the cotton fiber) is different, the fastness is different, the fastness of the twist is large, but the softness of the water-absorbing song is low, and the water absorption is good, soft and comfortable, but easy to fall. hair. Therefore, after a period of time, the cotton fiber will be lost, and the hard scalp will be left after the hair is lost. Towels usually have to change one for two to two months. The high-quality towel yarn has long fiber length and good fastness, and the hair loss is light. When it is hard, it is inevitable, but it will be much slower. Generally, flawless towels and printed towels are more likely to be hardened, while towels woven with high-twisted yarns are not as soft as innocent or weak towels, but the rate of hardening is much slower, and jacquard towels are also used than printed towels. The time is much longer.
After reading the above explanation, I believe that you should have an answer to the question of why the towel will harden!
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