How much is the shrinkage rate of pure cotton fabrics? […]
How much is the shrinkage rate of pure cotton fabrics?
What is the normal shrinkage rate of cotton fabrics? Clothing made of pure cotton fabrics may shrink after washing. It is said that it may be because some pure cotton clothes have been shrunk before leaving the factory. Such pure cotton clothes will not shrink again after they are bought and washed. Understanding the shrinkage rate of different fabrics can provide us with a reference for buying clothes.
1. What is the shrinkage rate of fabric?
The shrinkage of fabric refers to the percentage of fabric shrinkage after washing or immersion in water.
The smallest shrinkage is synthetic fibers and blended textiles, followed by wool, linen, and cotton fabrics in the middle, silk fabrics shrink more, and the largest shrinkage is viscose, rayon, and artificial wool fabrics.
2. The shrinkage rate of the fabric can generally be divided into:
① Natural shrinkage. Natural shrinkage refers to the natural shrinkage of the fabric after ironing or relaxation of the fabric in mass production;
② Washing shrinkage, washing shrinkage refers to the shrinkage of the garment after washing.
The correct method of testing the shrinkage rate of the fabric should be the same as the washing type of the bulk garment. If the garment is not washed, the fabric can be measured with a steaming iron.
3. The shrinkage rate of general fabrics:
Chemical fiber 4%-8%;
Cotton polyester 3.5%--5.5%;
3% for natural white cloth;
Wool blue cloth is 3-4%;
Poplin is 3-4.5%;
Floral cloth is 3-3.5%;
Card gabardine is 4-5.5;
4% for twill;
The whistle is 3-4%;
Labor cloth is 10%;
Rayon is 10%.
4. What are the factors that affect the shrinkage rate?
① Different fabric materials have different shrinkage rates. Generally speaking, for fibers with high moisture absorption, after being immersed in water, the fiber expands, its diameter increases, its length decreases, and its shrinkage rate is large. If the water absorption rate of some viscose fibers is as high as 13%, while the synthetic fiber fabric has poor moisture absorption, its shrinkage rate is small.
② The density of the fabric is different, and the shrinkage rate is also different. If the density in the warp and weft directions is similar, the shrinkage rate in the warp and weft directions is also close. Fabrics with a high warp density will shrink in the warp direction. Conversely, fabrics with a weft density greater than the warp density will shrink in the weft direction.
③ Different fabric yarn counts have different shrinkage rates. The shrinkage rate of fabrics with thick yarn counts is large, and the shrinkage rate of fabrics with fine yarn counts is small.
④ The fabric production process is different, and the shrinkage rate is also different. Generally speaking, in the process of weaving, dyeing and finishing the fabric, the fiber has to be stretched many times, and the processing time is long. The shrinkage rate of the fabric with greater applied tension is greater, and vice versa.
Pure cotton clothing will shrink. The specific shrinkage rate is related to the pre-shrinkage treatment process of the fabric production plant. Different processes have different shrinkage rates for finished garments.
Under normal circumstances, garment manufacturers will pre-shrink the fabric before it is made into garments (including steam pre-shrinking, etc.) to eliminate the potential for fabric shrinkage in advance. After pre-shrinking, the fabric will generally not shrink too much.