Method for making netting twine for euphausiasuperba resource development

Abstract

A method for making netting twine for euphausiasuperba resource development is characterized in that MMWPE resin, PP resin, EPDM resin and white oil or turpentine auxiliaries are mixed and evenly stirred by a stirrer to obtain blended MMWPE / PP / EPDM granules; the blended MMWPE / PP / EPDM granules are melted and extruded by a single screw extruder, melted and extruded spun filaments are cooled by low-temperature water in a cooling water tank and pre-drafted by a first drafting roller, pre-drafted filaments are subjected to hot drafting through a first drafting water bath and a second drafting roller for the first time and subjected to hot drafting through a second drafting water bath and a third drafting roller for the second time, blended and modified monofilament tows are taken up through a filament take-up machine making use of a torque motor, and bobbin-packaged monofilaments are twisted into one Z-twist single yarn, wherein each tow of the bobbin-packaged monofilaments contains ten blended and modified monofilaments; four Z-twist single yarns are primarily twisted into one S-twist strand; finally, three S-twist strands are twisted into the Z-twist netting twine.

Description

technical field [0001] The invention relates to a network cable for Antarctic krill resource development and a manufacturing method thereof. Background technique [0002] Antarctic krill is a type of krill that lives in the waters of Antarctica in the Southern Ocean and is a key species of the Antarctic ecosystem; Antarctic krill are shrimp-like invertebrates that live in colonies. The Antarctic krill fishery promotes the development of Antarctic krill resources and plays an active role in the rational use of Antarctic krill resources for human beings. Polyethylene wire is a trawling gear material currently used in the development and utilization of Antarctic krill resources, and its performance is related to the success or failure of Antarctic krill resources development and utilization. Ordinary polyethylene network cables pose potential safety hazards to Antarctic krill trawls in low-temperature and harsh operating environments. Along with the development of Antarctic k...

AI Technical Summary

Problems solved by technology

The monofilaments used in the development and utilization of the existing Antarctic krill resources are mainly ordinary polyethylene monofilaments, and the thread making process is single; and polyethylene monofilaments are used as the basic structural unit of polyethylene network cables. High-density polyethylene (HDPE) raw material drawing production of ethylene, the standard index of breaking strength of polyethylene monofilament is 5.2cN / dtex

The low breaking strength and knot strength of polyethylene monofilaments not only lead to relatively low breaking strength of polyethylene network cables, but also lead to poor safety and adaptability of trawl nets for the development and utilization of Antarctic krill resources. Therefore, the existing Antarctic krill resources development It is difficult to adapt to the rapid development of Antarctic krill fishery by using network cables. People urgently need new network cables for the development of Antarctic krill resources and their production methods, so as to produce new materials for network cables with high breaking strength and good adaptability for the development and utilization of Antarctic krill resources.

In the field of prior art, there is no Antarctica made of medium molecular weight polyethylene resin (referred to as MMWPE resin), polypropylene resin (referred to as PP resin), and ethylene-propylene-diene rubber (abbreviated as EPDM resin) as raw materials and made by special wire drawing and twisting processes. Krill resource development and utilization network cable, therefore, the solution to the problem of Antarctic krill resource development network cable and its production method has become a long-standing unresolved technical problem in this technical field