What happens to polyester hot melt yarn in a humid environment?

What happens to polyester hot melt yarn in a humid environment?

Polyester hot melt yarn, as a functional fiber, is widely used in many fields due to its unique physical and chemical properties. However, when this material is exposed to a humid environment, its performance may be affected to a certain extent. This article will explore the changes that may occur in polyester hot melt yarn in a humid environment.

1. Changes in hygroscopic properties
The main component of polyester hot melt yarn is polyester polymer, which has a certain hygroscopicity
. In a humid environment, the ester bonds on the polyester molecular chain can absorb and release moisture, making polyester hot melt yarn have good wet feel and hygroscopicity. However, excessive moisture may cause the hygroscopicity of polyester hot melt yarn to reach saturation, thereby affecting its drying speed and overall drying performance.

2. Influence of strength and durability
Polyester hot melt yarn is known for its wear-resistant and durable properties
. In a humid environment, the strength of polyester hot melt yarn may be affected by the intrusion of moisture. Long-term exposure to moisture may cause the fiber to swell, which in turn affects its structural integrity and strength. In addition, moisture may also accelerate the oxidation process of polyester hot melt yarn, causing the material to turn yellow and reduce its quality.

3. Changes in dyeing properties
Polyester hot melt yarn has good dyeing properties and can be dyed into various bright colors.

However, in a humid environment, the stability of the dye may be affected. Moisture may promote the movement of dye molecules, resulting in color migration or fading. In addition, a humid environment may also affect the bonding strength of the dye to the fiber, thereby affecting the fastness of the dyeing.

4. Changes in bonding properties
An important feature of hot melt yarn is that it can melt at a certain temperature and has good bonding properties.

In a humid environment, the low melting point characteristics of polyester hot melt yarn may be affected. Moisture may cause unevenness in the melting process, affecting the bonding effect. In addition, moisture may also affect the melting temperature of the hot melt yarn, requiring a higher temperature to achieve the ideal bonding effect.

5. Ability to resist microbial erosion
In a humid environment, polyester hot melt yarn may face the risk of microbial erosion. Although polyester hot melt yarn is not easy to be eaten by insects, it is susceptible to erosion by microorganisms and mildew and deterioration.

Therefore, in a humid environment, polyester hot melt yarn needs to pay special attention to anti-moisture and anti-mildew measures.

6. Environmental protection and recycling
The environmental protection of polyester hot melt yarn lies in that it can be recycled and reused to reduce resource consumption and environmental pollution.

However, in a humid environment, the recycled material may be degraded due to moisture and microbial erosion, affecting its reuse value.

Conclusion
In summary, polyester hot melt yarn may face problems such as changes in moisture absorption, decreased strength and durability, changes in dyeing performance, changes in bonding performance, and decreased resistance to microbial erosion in a humid environment. Therefore, for the storage and use of polyester hot melt yarn, a humid environment should be avoided as much as possible to maintain its optimal performance and extend its service life. At the same time, take appropriate anti-moisture and anti-mildew measures to protect the material from the influence of a humid environment.