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ISO 1805
ISO 1805
The ISO 1805 is a standard that dictates a method to measure the value of the breaking force and knot breaking force of netting yarns for fishing nets between countries. Fishing nets have to endure extreme weather conditions with yarns being constantly pulled, carried along with water currents, exposed to abrasion, and repeatedly loaded. The durability and performance of the fishing net are directly affected by the strength of the netting yarn used for weaving. Specified by ISO 1805, the standardized tensile testing procedures enable manufacturers and testing laboratories to determine the pull force on knotted or unknotted yarns until it breaks. The standard provides a test method that will allow testing of netting materials with the same method and compare different types of yarns.
Significance
In the fishing industry and netting industry, ISO 1805 is significant as it provides a way to ascertain the mechanical strength of the netting yarns prior to use in the manufacture of the netting. The introduction of the knots might result in stress concentration points, which can introduce a weakness in the yarn structure and potentially impact overall net performance. Together, breaking force and knot breaking force can give an insight into the real-life performance of the material. The standard is useful for quality control, choice of materials, development of products, and verification of performance. The results could be beneficial to manufacturers in determining what yarns are appropriate for particular uses as well as in ensuring that the same quality of fine net can be manufactured. Scope ISO 1805 covers the determination of breaking force and knot breaking force of netting yarns intended for fishing nets and related netting applications. This standard outlines the method of preparing samples, conducting tests, and evaluating results for measuring tensile strength. It is applicable for yarn manufacturers, fishing net manufacturers, test houses, and quality control staff in the development and assessment of netting materials.