The hot melt process of low melting point polyester blended yarn has a significant impact on its performance. The hot-melt process involves heating blended yarns to melt and bond low-melting polyester to varying degrees, thereby changing the properties of the yarns. The following are the key points of the impact of hot melt process on the performance of low melting point polyester blended yarn:
1. Effect of heating temperature:
Heating temperature has a significant impact on the tensile properties of blended yarns. As the heating temperature increases, the breaking strength of the yarn initially increases and then decreases, while the elongation at break gradually decreases as the temperature increases.
2. Effect of heating time:
Heating time has no significant effect on the stretchability and abrasion resistance of hot-melt yarn.
3. Preferred hot melt process:
Research shows that the optimal hot melt process is a heating temperature of 150°C and a heating time of 60 seconds.
4. Heat treatment process:
After heat treatment, the breaking strength of the yarn is overall improved, the elongation at break is reduced, the hairiness is reduced, and the friction coefficient is reduced. The preferred heat treatment process is a heat treatment temperature of 160°C and a heat treatment time of 3 minutes.
5. Comprehensive improvement of yarn properties:
Through reasonable hot-melt technology, size-free weaving of polyester-cotton yarn can be achieved, which improves the breaking strength and wear resistance of the yarn and gives the yarn better performance.
6. envirnmental factor:
Polyester and low-melting point polyester have poor hygroscopicity and are prone to static electricity during the production process. Antistatic treatment is required before use.
7. The importance of process flow:
In the production process of blended yarn, the uniform mixing of raw materials is very critical, which affects the physical and mechanical properties of the yarn and the appearance of the fabric.
8. Key points of production control:
In order to prevent foreign fibers from being mixed in and raw materials to be wetted out, production conditions need to be strictly controlled, such as maintaining low temperature and low speed production to ensure yarn quality.
9. Heat setting principle:
The principle of polyester heat setting involves changes in the supramolecular structure of the fiber. The heat setting process has an impact on the mechanical and physical properties and dyeing properties of the fabric.
Through these research results, it can be seen that the hot melt process plays an important role in improving the properties of low melting point polyester blended yarn, especially in improving breaking strength and abrasion resistance. At the same time, the temperature and time of heat treatment need to be precisely controlled to obtain optimal yarn performance.
