Which material is most likely to stretch under heavy load?

Nylon is known for its significant elasticity and ability to stretch under heavy loads. This synthetic polymer has a high tensile strength, which allows it to stretch considerably before breaking, making it ideal for applications where flexibility and strength are necessary. Nylon's molecular structure offers a degree of elasticity that means it can accommodate heavy loads without permanent deformation, which is a key characteristic for various uses, including ropes, straps, and other load-bearing materials.

In contrast, while polypropylene is lightweight and resistant to abrasion, it does not possess the same level of elasticity as nylon. Manila rope, made from natural fibers, has good strength but tends to be less flexible and can be prone to deterioration under excessive strain. Similarly, hemp, another natural fiber, is strong yet does not stretch significantly under load compared to synthetic alternatives. Therefore, nylon stands out as the material most likely to stretch under heavy load due to its inherent elastic properties.