What is a polyester cotton blend?
Polyester / cotton blended fabric is a kind of fabric developed in the early 1960s in China. It has the characteristics of straightness, smoothness, quick drying, durability, etc., is deeply loved by consumers.
Polyester cotton fabric refers to the fabric mixed with polyester fiber cotton fiber, which only highlights the style of polyester, but also has the advantages of cotton fabric.
Properties of polyester fiber
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As a new type of differential fiber material, polyester fiber has the characteristics of high strength, large modulus, small elongation good dimensional stability. The fiber is soft in texture, good in cohesion, soft in luster has certain core warming effect.
Polyester has poor hygroscopicity, its moisture regain rate is only about 0.4% in general atmosphere. Therefore, pure polyester fabric is stuffy hot to wear, but its fabric is easy to wash dry, so it has the reputation of "wash wear". Polyester has high modulus, next to hemp fiber, excellent elasticity, so the fabric is crisp, wrinkle resistant, stable in size good in shape retention.
Polyester has excellent wear resistance, which is next to nylon, but it is easy to pick up pilling, the pilling is easy to fall off.
Performance characteristics of cotton fiber
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The cross section of cotton fiber is irregular waist circle, with a middle cavity; the longitudinal end is a closed tubular cell, the middle is thick, the two ends are thin, natural crimp is the unique morphological characteristics of cotton fiber.
Cotton fiber is alkali resistant, acid resistant has strong absorption. The moisture regain of cotton fiber in standard state is 7% ~ 8%, the ratio of wet strength to dry strength is 1.1 ~ 1.15.
The strength of cotton fiber was affected when treated at 10 ℃ for 8h. Cotton fiber decomposes at 150 ℃ burns at 320 ℃.
The specific resistance of cotton fiber is low, so it is easy to produce static electricity in the process of processing using.
Advantages of cotton polyester blend
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It only highlights the style of polyester cotton, but also has the advantages of cotton fabric. Under dry wet conditions, it has good elasticity wear resistance, stable size, small shrinkage, has the characteristics of straight, easy to crease, easy to wash fast dry.
Moreover, it is glossy, smooth crisp to touch, with a certain degree of elasticity. After hand rubbing, the crease is obvious the recovery is fast.
However, the disadvantages of the same inherited chemical fiber: the place the friction is easy to pilling pilling. Polyester cotton blended fabric feels thick, soft comfortable to wear. It will deform, fold shrink after washing.
Let's take a look at the comparison between polyester cotton blend pure cotton
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Note: fabric (plain weave)
Strength elongation (polyester cotton blend > pure cotton)
Wear resistance (polyester cotton blend > pure cotton)
Pilling pilling (T / C blend < pure cotton)
T / C blended fabric is easy to pilling, mainly because of the low strength wear resistance of cotton fabric, the wool balls pellets formed on the surface of the fabric are quickly worn off;
However, the chemical fiber its blended fabric are easy to slide out of the fabric surface due to the small cohesion, high strength good elongation, especially the bending fatigue, torsion fatigue wear resistance. Once a small ball is formed on the surface, it is easy to fall off.
Moisture permeability (T / C blend < pure cotton)
Air permeability (polyester cotton blend > pure cotton)
How to judge the composition proportion of polyester cotton blended fabric quickly
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Observe appearance
As we all know, polyester is a kind of chemical fiber with a smoother surface larger reflective surface than cotton. Therefore, the surface of polyester cloth is smooth has a luster of chemical fiber. Comparatively speaking, the cotton cloth is relatively matte, the polyester cloth the cotton cloth are relatively easy to separate.
The yarn of polyester cotton blended fabric is made of polyester staple fiber cotton. One of the purposes is to make this kind of polyester cotton fabric have a cotton like appearance, which is difficult to judge if it is true false.
Hand feel difference
Polyester fabric is smooth, straight cold, while cotton fabric is soft easy to fold warm. As the same as above, polyester cotton short fiber blended fabric with high cotton content is difficult to judge accurately by hand alone.
Calculate the proportion of ingredients by specifications
We have learned how to calculate the theoretical weight formula of T / C shuttle weaving before. If the fabric is t / C weft T / C weft, we can calculate the theoretical proportion of T / C cotton composition through the formula.
Combustion method
1： The smoke produced by the burning of non dyed cotton cloth is blue smoke white smoke, while polyester cloth is black smoke. The polyester cotton blended fabric is black smoke with black flying flocs. The higher the polyester content, the darker the smoke, the less flying flocs.
2： Smell: the smell of cotton cloth is burning paper, the smell of polyester cloth is pungent burning glue, the smell of polyester cotton blended cloth is pungent burning glue.
3、 Burning speed state: the cotton cloth is flammable, it will continue to be accompanied with hidden sparks after extinguishment. The polyester cloth is difficult to burn, there is no spark after extinguishment.
Polyester cotton blended fabric is between the two, the more bright sparks appear during combustion, the larger the area, the longer the latent burning time of Mars after extinction, the more cotton there is.
