What Determines the Hardness of Coated Webbing

What Determines the Hardness of Coated Webbing

Coated webbing is increasingly prevalent in our everyday lives, found in items such as laptop bags, gaiters, woven chairs, trendy backpacks, and various luggage and outdoor products.

Depending on their application, we utilize coated webbing with varying levels of hardness. For instance, bag straps tend to be softer, while bundling straps for domestic automobiles require a firmer texture. This raises an important question: why do some coated webbings feel hard while others are soft? The answer lies in two primary factors.

 Raw Material

The hardness of coated webbing is largely influenced by the raw materials used in its construction. The three common materials for the coating layer are TPU, PVC, and silicone. Each material exhibits different hardness levels; generally, PVC and silicone are softer compared to TPU. Thus, coated webbing made from TPU will be harder than those made from PVC or silicone.

Moreover, even within the same material category, variations in hardness exist. For example, popular TPU formulations for coated webbing come in hardness ratings of 60A, 70A, 80A, and 85A-lower numbers indicate a softer texture.

Inner Webbing

The characteristics of the inner webbing also play a crucial role in determining the hardness of the coated webbing. Two key factors influence this: thickness and density. Thicker inner webbing results in a firmer overall structure. Additionally, the density of the webbing matters; inner webbings made from polyester or nylon that are tightly braided will yield a stronger and harder product. The closer the threads interlace, the greater the hardness.

The choice of material for the inner webbing is also significant. Typically, nylon webbing is harder than polyester when other conditions remain constant.

 Conclusion

In summary, both the materials used for the coating layer and the inner webbing significantly impact the hardness of coated webbing.

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