TPU Coated Webbing Adhesive

Question:

When coatinig TPU on webbing, do you use any adhesive?

Answer:

When coating thermoplastic polyurethane (TPU) on webbing, the use of adhesives depends on the desired bonding method and the materials involved.

Adhesive Options for TPU Coating

1. **Heat Welding**: TPU can be heat welded to itself, which is often the preferred method. This process involves applying heat to fuse the TPU coating directly to another TPU surface, creating a strong bond without the need for additional adhesives. The optimal temperature for this process is around 200 °C (approximately 400 °F) 

2. **Hot Melt Adhesives**: In cases where TPU needs to be bonded to other materials or fabrics, hot melt adhesives can be employed. For example, TPU elastic non-woven fabrics often come with hot melt adhesive dots that facilitate bonding to other fabrics. This method retains the softness of the material while ensuring effective adhesion.

3. **Specialized Adhesives**: For specific applications, such as waterproof bonding, products like Aquaseal or Stormsure are recommended. These adhesives are designed to work with TPU and provide flexibility and durability, although they may not bond as effectively to non-TPU surfaces.

4. **TPU Hot Melt Adhesive Films**: These films can be used to bond various materials and are advantageous due to their high adhesion and environmental compatibility. They require heating to activate the adhesive properties.

Conclusion

In summary, while TPU can be bonded effectively through heat welding, adhesives such as hot melt adhesives or specialized products may be necessary when working with different materials or for specific applications.

The choice of method will depend on the materials involved and the intended use of the coated webbing.