Originally Posted by
MattK
Specifically on RSBTRs website, the phrase "15x stronger the steel" is specifically refering to the Dyneema ripstop within the cuben fiber laminate. The poleyester it is sandwiched between is not as strong as steel. Additionally, it is important to note that the "15x stronger" metric applies only to tensile strength, not compression, shear, etc. It makes sense that this would be the metric, as tarps, flys, bags, etc, most often are subject to tension when used in the field.
Abrasion resistance is an important factor as well, however. In this case, if you compare similar weighted silicone impregnated nylon/polyester of comparable weights, cuben fiber is generally as abrasion resistant if not more than its more conventional counterparts, in addition to having a much higher tensile strength and tear resistance. For instance, classic silnylon is about 1.4osy. Cuben fiber of the 1.4osy variety is incredibly strong and very very abrasion resistant. A lot of thru hikers use this type of cuben for their backpack material with good success.
That said, RSBTR and other vendors continue close the gap with new fabrics and coatings.
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