Yes, polyester yarn will melt when exposed to high temperatures. Polyester is a synthetic fiber made from petroleum-based materials, and its melting point typically ranges between 250°C to 260°C (482°F to 500°F). When heated to this temperature, polyester fibers will soften and eventually melt, which can cause the yarn to lose its shape and structure.
This melting characteristic is important to consider in applications where the material may be exposed to high heat, such as in industrial or outdoor environments. However, the ability to melt is also an advantage in processes like heat sealing or hot melt yarn applications, where heat is used to bond fibers or create durable finishes.
Care should be taken to avoid ironing polyester at high settings or exposing it to open flames, as the yarn may melt or become damaged.
