The reason why pure cotton is pure cotton is because the cotton content is relatively high. Generally, the cotton content is about 75%, even if it is pure cotton. So what is black cotton? The reason why black cotton is black cotton is not because of cotton black, but because of the black heart! What are the characteristics of pure cotton and black cotton? What are the benefits of pure cotton, what harm does black cotton have? How to distinguish cotton and black cotton?
Cotton fabrics
Pure cotton cotton fabric is a good explanation, which is a textile made from cotton. Cotton with a cotton content of more than 95% is a four-piece cotton set. The cotton fabric is strong and resistant to folding and has good waterproof performance. The underwear made of this fabric is not easy to be folded and sweating will not cause The clothes are glued to the body, and the four-piece suit can make the skin breathable when the weather is hot, making people feel comfortable.
Advantages of cotton fabrics:
1 hygroscopicity:
Cotton fiber has good hygroscopicity. Under normal conditions, the four-piece fiber can absorb water into the surrounding atmosphere, and its moisture content is 8-10%, so it contacts human skin and makes people feel soft without stiff. If the humidity of the cotton cloth increases and the ambient temperature is high, the water content in the fiber will all evaporate and dissipate. The four-piece sleeve keeps the fabric in a water-balanced state, making people feel comfortable.
2 moisture retention:
Because cotton fiber is a poor conductor of heat and electricity, the thermal conductivity of bedding is extremely low, and because cotton fiber itself has porosity and high elasticity, a large amount of air can be accumulated between fibers, and air is a poor conductor of heat and electricity, so The cotton fiber textiles have good moisture retention, and the bedding products in cotton fabrics make people feel warm.
3 heat resistance:
The cotton fabric has good heat resistance. When the temperature is below 110 °C, the bedding will only cause the water on the fabric to evaporate without damaging the fiber. Therefore, the cotton fabric is worn at normal temperature, and the washing and dyeing have no effect on the fabric. This pair improves the washability and durability of cotton fabrics.
4 alkali resistance:
The resistance of cotton fiber to alkali is higher. The bedding of cotton fiber in the alkali solution does not cause damage to the fiber. This property is beneficial to the washing of the pollution after disinfection, disinfection and impurity removal, and also dyeing the cotton textile. Printing and various processing, wedding supplies to produce more new varieties of cotton.
5 Hygienic:
Cotton fiber is a natural fiber, its main component is cellulose, wedding supplies also have a small amount of waxy substances and nitrogen and pectin. The cotton fabric has been inspected and practiced in many aspects. The fabric is in contact with the skin without any stimulation, and has no negative effect. It is beneficial to the human body for a long time and has good sanitary performance.
Black heart cotton
"Black Heart Cotton" is a common name for inferior floc fiber products. Generally, the fiber products for household use (quilts, quilts, pillows, cotton clothes, etc.) do not meet the requirements of Articles 4.1 and 4.2 of the national standard GB18383-2007, and can be regarded as inferior household fiber products. "Black Heart Cotton" has the characteristics of white, dull, non-smooth, and odor-treating. Long-term users may cause itching and difficulty breathing.
Black cotton is a poor quality fiber product with the following characteristics:
1, white and dull.
2, feel no stretch.
3, not smooth, easy to stick clothing.
4. The broken fibers of both hands are broken and the fiber strength is extremely low.
5, there is chemical bleaching treatment has odor.
The bleached "black heart cotton" is extremely harmful to the human body. It not only destroys the waxy layer of the cotton fiber epidermis, but also absorbs a large amount of chemical substances in the fiber cavity and cell wall. Direct contact with the human body can cause symptoms such as itching, difficulty in breathing, and long-term use can cause illness.
Editor in charge: Xu Yuehua
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