In the market, four-hole cotton, seven-hole cotton, and nine-hole cotton pillows were smashed. This bedding is light, soft, feels good, and warm, attracting many customers. People can not help asking issued at the same time to buy: there is such a "hole" in "cotton" in the end what is "cotton"? In fact, what we call porous cotton is not what we often call natural growing white cotton. It is essentially a polyester fiber product. The "hole" of porous cotton refers to the section of polyester fiber which is observed under a high magnification microscope. The number of holes in its fiber section is usually referred to as four holes, seven holes and nine holes. What effect does the number of holes have on material properties? In general, because air is stored in the cavity, the higher and more the number of holes, the greater the amount of air. The better the air content in the insulation layer, the better the air permeability and heat preservation. The more air is filled in the cavity, the more channels are compressed and rebounded, and the more the bulkiness can be increased. Therefore, the greater the number of holes in the fiber, the better the air permeability, warmth and bulkiness of the fiber, and the softer it is. Therefore, there is "hole" that can be used for winter warmth, and it can be used as summer air conditioning. Although porous cotton is well-founded, it does not mean that more holes are better. Holes and more porosity. Correspondingly, the thickness of the hole wall is increased, occupying a certain amount of space and quality, so that the ability to absorb heat is enhanced, and the ability to isolate heat is weakened. Based on the above analysis and the calculation of the voidage, we can say that the more holes are better, the better is that there are usually seven holes and eight holes. Too many holes have increased surface area, heat transfer is fast, and the firmness is reduced. 　　 Soft Microfiber Cloth,Microfiber Cleaning Cloth,Custom Microfiber Cloths,Premium Microfiber Towels Wujiang Rongchao Silk Co., Ltd , https://www.wujiangrongchao.com
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