Changes in properties of polyamide netting materials exposed to different environments

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Changes in properties of polyamide netting materials exposed to different environments

Quality of a material and its durability in different environmental condition are two major factors influence the selection of material for fishing gears. A knowledge on the loss of properties is very useful for taking preventive measure. Present study aimed to find the changes in the properties of polyamide monofilament yarns and multifilament twines exposed to three different environments for a period of 90 days. Significant reduction in both breaking strength (P<0.05) and weight (P<0.05) was recorded in the test samples exposed to soil, water & weathering condition. The multifilament twines had more loss in breaking strength and weight than monofilament yarns in all three environments.

Polyamide is one of the most important synthetic fibre used for the fabrication of fishing gear. The efficiency of a fishing gear depends, to a very great extent, on the materials used for its construction. In the past natural materials were mainly used in fishing gears. Polyamide (PA) became the first synthetic material to replace cotton/hemp in India for the construction of fishing gear and its indigenous production was started in 1962. PA is available as multifilament twisted and monofilament single yarn for netting purpose. Previous studies showed the necessitates of frequent replacement of webbing of polyamide monofilament of diameter as thin as 0.16 mm as this lasts only for 6-9 months.

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