What is the difference between polyester and spandex?

The difference between polyester and spandex:

1. Strength: The short fiber strength of polyester is 2.6-5.7 cN/dtex, and the high-strength fiber is 5.6-8.0 cN/dtex. Due to its high strength, it is widely used for ropes and fishing nets. On the tool. In comparison, the strength of spandex is very poor, so polyester is the best in terms of strength.

2. Elasticity: The elasticity of polyester is close to that of wool. When it is stretched to nearly 5 to 6 percent, it can be fully recovered. The flexibility of spandex is better than that of polyester. Spandex can be stretched 5 to 7 times longer than the original length, and its elasticity is widely used on elastic pants. Spandex is more elastic.

3, heat resistance: polyester can resist exposure, can be exposed to sunlight for a thousand hours. The spandex is generally heat resistant.

4. Hygroscopicity: The internal molecular structure of polyester is closely arranged and lacks a hydrophilic group, so the moisture regain is low and the hygroscopicity is poor. The same is true for spandex, and the hygroscopicity is also very poor.

5. Others: Spandex has good light resistance and is resistant to acid, alkali and abrasion. Polyester is resistant to light, abrasion and corrosion, but hot alkali can decompose polyester.

Polyester:

Characteristics: Polyester is an artificial fiber, has the characteristics of artificial fiber, high strength, and is resistant to pressure and heat. It can remain at 60% to 70% when exposed to sunlight for a thousand hours, but The fabric made of polyester has poor hygroscopicity.

Uses: Because polyester is artificial fiber, it can be blended with cotton, hemp and wool to make various fabrics. Because of its high pressure resistance and resistance to exposure, it can be made into fishing nets, ropes, tire cords, etc. in the industry, and can also be used as an insulating material.

Spandex:

Characteristics: Spandex is the same as polyester, but it is also artificial fiber, but the biggest difference with polyester is that spandex is not resistant to pressure. The common point with polyester is that it is poor in hygroscopicity. Spandex has its unique characteristics, its elasticity is very good, professional tests show that spandex can be 5 to 7 times longer than the original length, while being light and wear resistant.

Uses: Spandex is best known for its elasticity. With its elasticity, it is widely used in underwear, underwear, tights, casual wear and sportswear. It is also used in the medical field: bandages are also made of spandex.