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Knowledge about polyester

Views: 0     Author: Site Editor     Publish Time: 2022-05-27      Origin: Site Inquire

From the perspective of the molecular composition of polyester, it is composed of short aliphatic hydrocarbon chains, ester groups, benzene rings, and terminal alcohol hydroxyl groups. In addition to the existence of two terminal alcohol hydroxyl groups, there are no other polar groups in the polyester fiber, so the hydrophilicity of polyester fiber is extremely poor. Polyester molecules contain about 46% ester groups, which can be hydrolyzed and pyrolyzed when the temperature is above 200 °C, and saponified in case of strong alkali, which reduces the degree of polymerization. influences.

 

Characteristics of polyester

High strength, good elasticity, heat resistance, heat insulation, abrasion resistance, corrosion resistance are relatively good, but dyeing and hygroscopicity are relatively poor, but the color fastness is good, not easy to fade. Because there is no specific dyeing group on the polyester molecular chain, and the polarity is small, it is difficult to dye, and the dyeability is poor, and the dye molecules are not easy to enter the fiber; it is sultry to wear, and it is easy to carry static electricity and stain dust, which affects Aesthetics and comfort. However, it is very easy to dry after washing, and the wet strength hardly decreases, and it does not deform. It has good wash and wear performance.

There are many types of polyester fiber fabrics. In addition to weaving pure polyester fabrics, there are many products that are blended or interwoven with various textile fibers, which make up for the shortcomings of pure polyester fabrics and exert better wearing performance. Polyester fabrics are developing towards the naturalization of synthetic fibers such as wool-like, silk-like, linen-like, and deerskin-like fibers.

 

The advantages of polyester-cotton blends

Contrast effect of polyester-cotton blended fabric and pure cotton fabric:

Strength and elongation (polyester-cotton blend > pure cotton);

Abrasion resistance (polyester-cotton blend > pure cotton);

Pilling (polyester-cotton blend < pure cotton).

Polyester-cotton blended fabrics are prone to pilling, mainly because cotton fabrics have low fiber strength and poor abrasion resistance, and the hairballs or pellets formed on the surface of the fabric are quickly worn off; while chemical fibers and their blended fabrics are due to the small cohesion between fibers, The fiber has high strength and good elongation ability, especially good resistance to bending fatigue, torsional fatigue and wear resistance, so the fiber is easy to slip out of the surface of the fabric, and it is not easy to fall off quickly once a small ball is formed on the surface; wrinkle resistance ( Polyester-cotton blend > pure cotton); moisture permeability (polyester-cotton blend < pure cotton); breathability (polyester-cotton blend > pure cotton).

 

Advantages of polyester and linen blends

In the past, linen textiles had high yarn density and could only be used to weave medium and low-grade products. They were only suitable for outerwear and decorative fabrics, which did not reflect the unique advantages of linen textiles such as moisture absorption, good moisture release, and coolness. Now we use polyester fiber and flax fiber to produce high-grade linen blended products suitable for summer inner and outer clothes. What are the characteristics of polyester and linen blended fabrics?

 1. cool to the touch

The blending ratio of flax fiber is 35%-40%, and the coverage rate of flax fiber on the appearance of the yarn is high. Therefore, when the human skin contacts the polyester/linen low-tex fabric, the heat on the surface of the human body will be quickly dissipated, thereby making people cool. a feeling of.

 

 2. Lightweight and brightly dyed fabric

The yarn is relatively fine, generally below 20tex (above 50 public counts), and can be interwoven into ultra-thin fabrics alone or with pure or blended yarns of other textile fibers. The product is of high grade, dyed and printed brightly, beautifully and gorgeously. The fabric is famous for its coolness, transparency, thinness and coolness.

 

3. Good wrinkle resistance

Due to the fiber characteristics, it can not only use the advantages of good wrinkle resistance of polyester to improve the shortcomings of linen fiber fabrics that are easy to wrinkle and not brightly dyed, but also use the advantages of linen fiber to improve moisture absorption and moisture release. The shortcomings of poor polyester fabrics and uncomfortable wearing .

 

4. Comfortable to wear and good washability

The blending ratio of polyester and linen yarn and fabric is moderate, the fabric is soft to the touch, easy to wash, easy to dry, and has good plasticity. Inner and outerwear fabrics.


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