Consequently the spandex fiber at the middle is wrapped with two levels of polyester or nylon fibers that improve durability and resilience, making it ideal for substantial-efficiency apps. Drawing: The fibers are then stretched to improve their toughness and elasticity. This process, called drawing, aligns the polymer chains inside the https://rubbercoveredyarn71470.affiliatblogger.com/83878858/the-best-side-of-rubber-covered-yarn