Fiber processing method for mesh purse seine nets

Abstract

The invention provides a processing method of fibers for a grid type purse net fishing net. The processing method is characterized by comprising the following steps: pre-mixing UHMWPE (Ultrahigh Molecular Weight Polyethylene) powder, silicone powder, nano silicon dioxide, HDPE (High-density Polyethylene) powder, a nano titanium dioxide silver-loaded antibacterial agent, an antioxidant B225, hydroxystearic acid, nano-grade diatomite, nano-grade white carbon black, nano-grade wollastonite and an ethylene-vinyl acetate copolymer, which are weighed according to a formula, and pouring the mixture into a high-speed kneading pot and carrying out high-speed kneading to obtain a UHMWPE modified material; fusing and extruding the UHMWPE modified material through a double-screw-rod extruder; fusing and extruding an extruded product from a spinneret hole through a metering pump which is additionally arranged on a double-screw-rod outlet; cooling, pre-stretching and hotly setting extruded freshly formed filaments and winding a fiber bundle through a fiber winding machine which utilizes a torque motor; dividing the fiber bundle into fibers through a fiber dividing machine, so as to obtain the fibers for the grid type purse net fishing net.

Description

technical field [0001] The present invention relates to fibers for mesh fences. Background technique [0002] In this technical field, the grid-style seine refers to a breeding seine that is arranged in a grid and mainly breeds fish, shrimp, shellfish, ducks, geese and other organisms, such as a grid-shaped grid, a grid-shaped grid, and a zigzag grid. Seines in the form of nets, etc., successful cases such as the grid-shaped seines designed by Shi Jiangao, a researcher at the East China Sea Fisheries Research Institute, and the grid-shaped seines in the field. In the production of mesh seine nets, due to fouling organisms, the exchange of water inside and outside the mesh seine nets is not smooth, which further leads to frequent occurrence of fish diseases in farmed fish and a decline in the quality of raised fish. Farmers complain about this, and people can only use Cleaning, changing nets and other methods are used to maintain and utilize grid seine nets; however, the str...

AI Technical Summary

Problems solved by technology

The nets involved in this technical field are large (areas up to more than 10 mu), and the production and operation conditions are harsh (water depth and waves are large), which are far from technical fields such as net cages, plastics, textiles, and offshore fishing. Therefore, the monofilaments in the above fields , multifilament, pipe, profile, film, and split film production methods cannot produce a kind of fiber for mesh purse seine

In the prior art, polyethylene fiber is produced by using 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 produced polyethylene fiber have no antibacterial and antifouling functions and low breaking strength (The breaking strength of the existing polyethylene fiber is only 5.2cN / dtex), which leads to the occurrence of severe adhesion of fouling organisms in the production of mesh seine nets, and the occurrence of broken fish in mesh seine nets under severe operating conditions such as typhoons Avoiding accidents, polyethylene fibers in the prior art have low breaking strength and lack of antibacterial and antifouling functions, so it is difficult to adapt to the needs of modern fishery production. People urgently need processing and production with good roundness and high breaking strength (breaking strength greater than 7.5cN / dtex) , high elongation at break (elongation at break greater than 9%), and antibacterial and antifouling functions (can effectively prevent the attachment of seawater and freshwater fouling organisms) is a mesh-style seine fiber

In this field, HDPE resin raw materials, traditional melt spinning technology and equipment cannot produce the above-mentioned fiber for mesh seine nets, and ultra-high molecular weight polyethylene (abbreviated as UHMWPE) has too much molecular weight, high melt viscosity, and processing flow. Therefore, it is difficult to directly spin with traditional melt spinning technology and equipment. Therefore, a kind of fiber for mesh seine netting has become a long-term unresolved technical problem in this field.