Can polyester hot melt wire still be hot melted in a humid environment?

Can polyester hot melt wire still be hot melted in a humid environment?

As an important thermal bonding material, polyester hot melt wire is widely used in various fields. However, many people have doubts about its hot melt performance in a humid environment. This article will explore the hot melt performance of polyester hot melt wire in a humid environment to help you better understand and use this material.

Basic characteristics of polyester hot melt wire
Polyester hot melt wire is a low-melting polyester fiber with the following basic characteristics:
Low melting point: The initial melting point is usually between 110-140°C and can be customized.
Strong adhesion: It can quickly melt and bond to other materials at high temperatures, and form a stable bond after cooling.
High strength: It exhibits high tensile strength and wear resistance, and can withstand greater external pressure and friction.
Good washability: The hot melt bonding process combined with other fibers makes the product have good washability and is not easy to fall off or deform during washing.
Environmentally friendly and sustainable: The waste generated during the production process can be recycled and reused to reduce the impact on the environment.

Effect of humid environment on polyester hot melt yarn
In a humid environment, the hot melt performance of polyester hot melt yarn may be affected to a certain extent. The specific performance is as follows:
Poor hygroscopicity: The hygroscopicity of polyester hot melt yarn is poor. Under standard environment, its moisture regain is low, usually around 0.4%. This allows it to maintain good dryness in a humid environment.
Changes in hot melt performance: Although polyester hot melt yarn can still be hot melted in a humid environment, its hot melt performance may decrease. The presence of moisture may affect its melting speed and bonding strength. In a high humidity environment, the melting temperature of the hot melt yarn may increase slightly, and the bonding effect may not be as ideal as in a dry environment.

Experimental data and case analysis
According to relevant experimental data, the hot melt performance of polyester hot melt yarn in a humid environment changes as follows:
Melting temperature: In an environment with a relative humidity of 60%, the melting temperature of polyester hot melt yarn is slightly higher than that in a dry environment, but it is still within a controllable range.
Adhesion strength: In a humid environment, the bonding strength of polyester hot melt yarn will decrease, but it can still meet the needs of most application scenarios.

How to use polyester hot melt in a humid environment
In order to better use polyester hot melt in a humid environment, the following measures can be taken:
Control humidity: Try to use polyester hot melt in a relatively dry environment to avoid the influence of high humidity on hot melt performance.
Increase temperature: When used in a humid environment, the hot melt temperature can be appropriately increased to ensure that the hot melt can be fully melted and bonded.
Strengthen protection: During use, some protective measures can be taken, such as wrapping with waterproof materials, etc., to reduce the influence of moisture on the hot melt.

Conclusion
Polyester hot melt can still be hot melted in a humid environment, but its hot melt performance may be affected to a certain extent. By taking appropriate measures, such as controlling humidity, increasing temperature and strengthening protection, the influence of humid environment on the hot melt performance of polyester hot melt can be effectively reduced, ensuring its normal use in various environments.