Study on the suitability of polyketone monofilament material for fishing

Polyketone (POK) material is an engineering plastic copolymerized by carbon monoxide and olefins (ethylene, propylene). It has good tensile properties and excellent impact resistance, and is expected to become a new fishery material. In order to explore the suitability of POK monofilament materials for fishing, the thermal properties, dynamic mechanical properties, creep properties, mechanical properties and wear resistance of POK monofilament were comprehensively tested and analyzed by differential scanning calorimeter, dynamic mechanical properties analyzer, universal tensile testing machine, abrasion tester and other equipment. The results showed that: the crystallinity of POK monofilament is 38. 44%,the melting temperature is 200. 8 °C, and the use environment temperature can reach 150 °C. Compared with the UHMWPE monofilament and polyamide (PA) monofilament of the same diameter,the modulus of POK monofilament is the largest (118. 04 MPa) at the same temperature, and it also has a better mechanical modulus at low temperature (0-20 °C). The creep test shows that the tensile strain of POK monofilament is about 9%. The advantage of POK monofilament in the long effect of rope net is obviously higher than that of UHMWPE monofilament and PA monofilament. In the knotting state, the knot breaking load of POK monofilament is higher than UHMWPE monofilament and PA monofilament of the same diameter in both dry (3. 96 daN) and wet (4. 02 daN) conditions. In addition, the wear resistance of POK monofilament is excellent. Under the same friction conditions, the rate of retention strength of POK monofilament in the dry (wet) state is 58. 38% (60. 90%), which is also higher than that of UHMWPE monofilament and PA monofilament with the same diameter. Research shows that compared with UHMWPE monofilament and PA monofilament of the same diameter, POK monofilament has abrasion resistance, high temperature resistance, high modulus, low creep, high nodular strength, and its comprehensive performance and adaptability are good,which provides theoretical and technical support for the development and industrial application of POK monofilament rope netting for fishing. With the far-reaching sea cage aquaculture, large fence aquaculture, Antarctic krill fishery and tuna seine fishery development of modern fishery, fishing fiber should possess wear resistance, anti-pollution function, degradation performance, creep resistance. In order to meet the high-quality development needs of modern fisheries, through further technical research and development, it is expected to develop new modified POK monofilament materials with antifouling function,degradation function and high strength performance in the future. Therefore, POK monofilament has a broad application prospect in fisheries, and can be used as fiber materials in fields such as deep sea cage, breeding fence, and ocean fishing gear. However, there is a long way to go and further research is needed.