Cotton has good hygroscopicity, high moisture retention, good heat resistance, strong alkali resistance and good hygiene. These are the reasons why you are willing to buy cotton bedding. As for what you are concerned about, will the cotton shrink? The answer is yes. But do you know why cotton shrinks?
1: Cotton material
Pure cotton fabric is made of Composed of plant fibers, when the fabric is soaked, water molecules will enter the interior of the cotton fiber, causing the fiber to swell. When the weft (or warp) direction of the fabric swells and becomes thicker, the fabric will shrink, so the time it takes to soak in water The longer it is, the greater the shrinkage will be. Of course, this is only relative and will not shrink endlessly.
Two: Textile processing
Pure cotton fabrics in textile dyeing During the finishing process, the fibers are stretched by a certain external force. After finishing, this stretching will temporarily be in a “stable” state. When washed in water, the moisture will gradually weaken the connection between fiber molecules, reduce the friction on the fiber surface, destroy the temporary “stable” state, and the fiber will return to or approach its original equilibrium state. Generally speaking, during the weaving, dyeing and finishing process, it needs to be stretched many times. The fabric with greater tension will have a greater shrinkage, and vice versa.
Three: Yarn weaving of fabrics
Everyone should know the complete The yarn weaves of cotton bedding can be roughly divided into 1288*68, 130*70/13372/40 satin/60 satin/80 satin, etc. The higher the yarn weave, the more high-end the fabric, and the processing of the fabric is also different (such as pre-shrunk Treatment or steam pre-shrinking, etc., to eliminate the potential for fabric shrinkage in advance. After pre-shrinking, the fabric will generally not shrink significantly).
Four: Classification of fabrics
Commonly used cotton bedding It can be roughly divided into four types: ordinary cotton four-piece set, combed cotton four-piece set, mercerized cotton four-piece set, and brushed four-piece set. The ordinary shrinkage rate can only depend on personal luck. Generally speaking, good manufacturers You can rest assured about the product. Generally, combed cotton and mercerized cotton have been processed before leaving the factory, and the problems are not big. Regarding sanding, I can only say that the cheaper the product, the greater the shrinkage. Why is the same thing cheaper? Insufficient size and reduced post-processing steps.
Five: Shrinkage rate of cotton
For pure cotton fabric products, the national standard shrinkage rate is: less than or equal to 5% (that is, 100cm fabric is normal to 95cm after washing). Pure cotton bedding must be stretched when it is about to dry after washing. Stretch. Once the quilt cover is dry, stretching is useless. If your quilt cover is really much larger than the quilt core, shrinking it is useless. A general pure cotton quilt cover shrinks to 10cm, which is a standard 200*230 quilt cover. The shrunk size is 190*220cm.
6: Correct washing and maintenance of cotton
Washability is not allowed Use hot water, and the water temperature should be controlled below 35°C. Do not soak it in detergent for a long time, do not iron at a temperature higher than 120°C, do not expose it to the sun, and do not dry it in the dryer. Proper washing and drying should be done in a cool place and laid flat or on a stick-type drying rack. It is best to wash by hand.
Conclusion
Objectively speaking, there are more or less pure cotton fabrics. To solve the problem of shrinkage and fading, the key is post-processing. Therefore, general home textile fabrics have been preshrunk. However, pre-shrinking does not mean that it will not shrink, but it means that the shrinkage rate is controlled within the national standard 3%-4%%. </p
