What factors affect the melting point of thermoplastic polyurethane TPU materials, and how is it measured?

The melting point of thermoplastic polyurethane refers to the temperature at which the material transitions from a solid to a molten state, expressed in degrees Celsius ℃. Several factors influence the melting point of thermoplastic polyurethane materials:

• Hard segment content: Higher hard segment content results in a higher melting point.
• Molecular weight: For materials with the same hard segment content, a higher molecular weight leads to a higher melting point.
• Hard segment composition: Different raw materials in the hard segment can cause variations in the melting point.

The melting point is tested under constant pressure by measuring the temperature at which thermoplastic polyurethane transitions from a solid to a molten state. This measurement reflects the thermodynamic performance of the material.

Understanding these factors helps manufacturers select the right thermoplastic polyurethane for applications such as hot melt adhesive films, ensuring optimal performance in both processing and end-use conditions.