Knotted net for marine fishery

Abstract

Disclosed is a knotted net for marine fishery. The knotted net for marine fishery is characterized in that UHMWPE powder, HDPE powder, a silver-supported nano-silica antimicrobial agent, hydroxystearic acid, silicone powder, an antioxidant B225, nanoscale white carbon black, an antioxidant aid DLTP, a vinyl-vinyl acetate copolymer, nanoscale diatomite and turpentine are premixed and then poured into a high-speed kneading pot to be subjected to high-speed kneading, and a modified UHMWPE composite is obtained; the modified UHMWPE composite is subjected to melt extrusion through a twin-screw extruder, extrudate is subjected to melt extrusion from spinneret orifices through a metering pump additionally arranged at a twin-screw outlet, extruded spun filaments are cooled and pre-drafted, the pre-drafted filaments are subjected to heat setting, and then melt-spun filament bundles are taken up through a filament take-up machine of a torque motor; the melt-spun filament bundles are subjected to primary twisting through a stranding machine, and then Z-twisting-direction strands are obtained; every three Z-twisting-direction strands are processed into an S-twisting-direction three-strand net line with the twisting pitch of 24 mm through a three-strand rope twisting machine, and the three-strand net lines are knitted into the knotted net for marine fishery through a single-hook netting machine.

Description

technical field [0001] The invention relates to a marine fishery knotted net in the technical field of marine biological resource development and utilization. Background technique [0002] Marine fishery is one of the important contents of the marine industry, including the development and utilization of marine biological resources such as pelagic fishing fishery and ultra-large pastoral purse seine aquaculture. In this technical field, the mesh made of mesh wire is called knotted mesh; people refer to melt-spun monofilament as melt-spun filament for short. The development of marine fishery depends on factors such as the comprehensive strength of the country and region, the degree of industrialization, domestic and foreign markets, the level of public consumption, and the level of the marine industry (such as the level of netting and its wire technology). With the development of marine fishery, people have put forward higher requirements for the comprehensive performance of...

AI Technical Summary

Problems solved by technology

In the field of prior art, silk for weaving nets generally uses a single high-density polyethylene resin (hereinafter referred to as HDPE resin) as a raw material, and is processed and produced by a traditional melt-spinning process, which makes the performance of the melt-spun yarn and the knotted net product after processing Poor (for example, the breaking strength index of qualified wire for weaving nets in the existing field is only 5.2cN / dtex, and the mesh breaking strength index of 120-strand polyethylene knotted net is only 1440N), and it is easy to break fish in the net under harsh sea conditions Accidents are lost, the existing technical field has poor comprehensive properties such as the strength and wear resistance of knotting nets and weaving wires, and is difficult to adapt to the development requirements of modern marine fisheries. People need good production safety and moderate prices (prices are lower than Polyamide mesh), high breaking strength, good wear resistance, high-performance knotted net for marine fishery with certain antibacterial and antifouling effects

In this technical field, HDPE resin raw materials, traditional melt spinning and weaving techniques cannot produce the above-mentioned knotted nets for marine fisheries, and ultra-high molecular weight polyethylene (UHMWPE) has extremely poor processing fluidity. Therefore, a useful net for marine fisheries Netting has become a long-term unresolved technical problem in this technical field