How to choose high breaking tensile strength netting for fishing nets?

Net clothing is an important part of fishing gear, and its material, structure, specification and shape directly affect the production effect of fishing gear. Early nets were made of polyethylene (PE) monofilament, which was widely used in fishery production because of its low density, low cost, and good water filtration. With the development of modern fishery, ordinary synthetic fiber nets such as PE nets can no longer meet the production needs, so people began to develop and apply high-performance net materials to improve the strength, wear resistance, impact resistance and anti-corrosion properties of nets. Pollution performance etc. For example, high-density polyethylene (HDPE), which was first put into use, is widely used as a netting material because of its low density, abundant raw materials and low cost. However, with the emergence of other high-performance materials, coupled with the lack of HDPE in terms of mechanical properties, it is gradually replaced by new high-performance Fishing Net materials, and polyarylate fiber nets are one of them. Polyarylate fiber is a high-strength fiber, and its varieties include Vectran HT, Vectran HM, Vectran NT, etc. Vectran fiber has been used to make nets or fishing lines due to its high strength, good vibration absorption, and good shock resistance. Poly-p-phenylene terephthalamide (PPTA) fiber is also gradually used in the fishery field because of its excellent mechanical properties, which can greatly reduce the diameter of the net wire and the resistance of the net gear, and realize energy saving and consumption reduction in fishery production. There is also carbon fiber, which has superior performance and has been widely used in fields such as ropes and fishing rods, but it is not suitable for industrialized development in fishing nets. Ultra-high molecular weight polyethylene (UHMWPE) fiber is another new high-performance fiber material for fishing after Vectran fiber and carbon fiber, which can make nets have excellent comprehensive performance. Under the same breaking strength of UHMWPE fiber netting, the diameter of the net wire is 50% to 60% smaller than that of PE, and 40% to 50% smaller than that of nylon (PA). Therefore, the netting made of UHMWPE fiber can reduce the net It has water resistance, saves the energy consumption of the net gear operation and improves the wind and wave resistance performance of the net gear. Antifouling of net clothes is also an inevitable problem in the field of aquaculture. The innovative application of anti-fouling functional nets such as copper alloy nets has promoted the upgrading of anti-fouling technology for nets. Copper alloy material has good antibacterial and antifouling functions, and the high-performance netting made of it has good antifouling performance. Semi-rigid polyethylene terephthalate (PET) monofilament is also an environmentally friendly fish

The total impact energy absorbed by UHMWPE fiber is 2.6 times, 1.8 times and 3.6 times that of PPTA fiber, carbon fiber and glass fiber, respectively. Therefore, UHMWPE netting has good impact resistance. Although its impact resistance is better than other fishing net materials, for mariculture, the net clothing has been in the water for a long time, coupled with the influence of the environment, there are higher requirements for the impact resistance of the net clothing. Some scholars modify the impact resistance of materials by filling them. Ma et al. prepared composite fibers with excellent impact resistance by filling WS2 nanomaterials; Tong et al. also prepared composite fibers with excellent impact resistance by filling wollastonite fibers with 10% (mass fraction) surface modification.

In terms of marine aquaculture, because UHMWPE net material has high strength, good aging resistance, and can reduce water resistance, it has become the first choice for modern breeding facilities. Relevant researchers have verified that UHMWPE nets have good safety and anti-wave performance through application tests on UHMWPE nets. Under the same net specifications, UHMWPE nets have higher strength than ordinary nets; currently UHMWPE nets have been It is popularized and applied in multiplication and breeding facilities such as Telif fiber ultra-large deep-sea cages with a circumference of 200 m