Polyester yarn is a synthetic fiber with the following advantages and disadvantages:

advantage:

1. High strength: Polyester yarn has higher strength than natural fibers and has good stretchability and wear resistance, making textiles more durable.

2. Good durability: Polyester yarn has the characteristics of light resistance, corrosion resistance and wear resistance, is not easy to deform and age, and has a long service life.

3. Anti-pilling: The polyester fabric has a smooth surface, is not easy to pill, and is not afraid of mold.

4. Quick drying: Polyester yarn has low hygroscopicity, and the accumulated moisture evaporates quickly, making the textile easier to dry.

5. Easy maintenance: Textiles made of polyester yarn do not require special care, are washable and heat-resistant, and are easy to clean and maintain.

shortcoming:

1. Non-breathable: Polyester yarn is relatively non-breathable and prone to stuffiness, so it is not suitable for long-term wear in high-temperature environments.

2. Static electricity generation: Polyester yarn is easy to accumulate electricity and easily generate static electricity, causing discomfort to the wearer.

3. Low hygroscopicity: Polyester yarn has poor hygroscopicity and cannot absorb and release moisture as quickly as natural fibers, which can easily cause discomfort to the wearer.

4. Impact on the environment: Polyester yarn is a synthetic fiber. Its production process requires a large amount of energy and chemical substances, and it is not easy to degrade, which has a certain impact on the environment.

To sum up, polyester yarn has advantages in strength, durability, wrinkle resistance, etc., but has some shortcomings in breathability, moisture absorption and environmental friendliness. However, many companies are currently improving the shortcomings of polyester yarn through blending and special processes. When using polyester yarn products, their advantages and disadvantages need to be considered on a case-by-case basis to meet needs and preferences.