Yarn on Yarn Abrasion Resistance

Depending on the nature of the working environment, the abrasive wear of concrete floor slabs can range from scratching or scuffing to impact and local crushing. To assess abrasion resistance it is, therefore, necessary to have a versatile apparatus. Abrasion & Wear  Testing. When abrasion is the predominant factor causing deterioration of your materials, testing will give you data to compare materials or coatings and can help you predict the life time of a material or coating. Abrasion testing is used to test the abrasive resistance of solid materials. Interyarn abrasion has been determined to be a principal cause of failure and of short service life of large synthetic fibre ropes during tension and bend cycling. The YoY abrasion test is used to determine the quality of finish applied on yarns to enhance abrasion resistance, especially in wet conditions. It is also used to compare the relative abrasion resistance of various yarns. The test measures abrasion cycles to failure on interwrapped yarn at various applied tensions. The yarn is interwrapped in contact with itself between three pulleys, as shown in Figure 1. For wet testing the interwrapped yarn is immersed in water. The yarn is then drawn back and forth under tension until it fails. A number of tests are conducted at each of several applied tensions. The abrasion test is now described in ASTM D-6611, “Standard Test Method for Wet and Dry Yarn-on-Yarn Abrasion Resistance” and in Cordage Institute (CI) 1503 “Test Method for Yarn-on-Yarn Abrasion, Wet and Dry”. It is the basis for CI 2009P “Performance Requirements for Marine Grade Polyester Yarn for Fiber Rope”.