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What are the characteristics of polyester fiber?


What are the characteristics of polyester fiber

Polyester fiber is a common textile material, which has the advantages of high strength, good elasticity, heat resistance, abrasion resistance, and light resistance, but also has the disadvantages of poor solvent resistance, dyeability, and poor hygroscopicity. When we buy clothes, we sometimes find that there are two kinds of polyester fiber and polyester fiber. Many friends do not understand the difference between the two. In fact, polyester is another name for polyester fiber. There is not much difference between the two. In fact, It's the same thing. Let's take a look at polyester fiber together! The characteristics of polyester fiber

1. High strength

The short fiber strength is 2.6-5.7cN/dtex, and the high-strength fiber is 5.6-8.0cN/dtex. Due to its low hygroscopicity, its wet strength is essentially the same as its dry strength. The impact strength is 4 times higher than that of nylon and 20 times higher than that of viscose fiber.

2. Good elasticity

The elasticity is close to that of wool, and when it is stretched by 5% to 6%, it can be almost completely recovered. The wrinkle resistance exceeds other fibers, that is, the fabric does not wrinkle and has good dimensional stability. The modulus of elasticity is 22-141cN/dtex, which is 2-3 times higher than nylon. .Polyester fabric has high strength and elastic recovery ability, so it is durable, wrinkle-resistant and non-ironing.

3. Strong heat resistance

Polyester is made by melt-spinning method, and the formed fiber can be heated and melted again, which belongs to thermoplastic fiber. The melting point of polyester is relatively high, and the specific heat capacity and thermal conductivity are small, so the heat resistance and heat insulation of polyester fiber are higher. It is the best among synthetic fibers.

4. Good thermoplasticity, poor melting resistance

Due to its smooth surface and tight internal molecular arrangement, polyester is the most heat-resistant fabric among synthetic fabrics. It is thermoplastic and can be made into pleated skirts with long-lasting pleats. At the same time, polyester fabric has poor melting resistance, and it is easy to form holes when encountering soot and sparks. Therefore, try to avoid contact with cigarette butts, sparks, etc. when wearing.

5. Good wear resistance

Abrasion resistance is second only to nylon with the best abrasion resistance, better than other natural fibers and synthetic fibers.

6. Good light fastness

Lightfastness is second only to acrylic. The light fastness of polyester fabric is better, except that it is worse than acrylic fiber, and its light fastness is better than natural fiber fabric. Especially behind glass the light fastness is very good, almost on par with acrylic.

7. Corrosion resistance

Resistant to bleaches, oxidants, hydrocarbons, ketones, petroleum products and inorganic acids. Dilute alkali resistance, not afraid of mildew, but hot alkali can make it decompose. It also has strong acid and alkali resistance and UV resistance.

8. Poor dyeability, but good color fastness, 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, the dyeability is poor, and the dye molecules are not easy to enter the fiber.

9. Poor hygroscopicity

It feels stuffy when worn, and polyester fiber is easy to be charged with static electricity and stained with dust, which affects the appearance and comfort. However, it is very easy to dry after washing, and the wet strength hardly decreases, does not deform, and has good washability and wearability.