Method for making round wire for processing grouper breeding net

Abstract

Disclosed is a fabrication method for round filaments for producing grouper culture nets. Auxiliaries, high-density polyethylene (HDPE) resins, metallocene linear low density polyethylene (LLDPE) resins, a stirring machine, a single-screw extruder, a twice-drawing electrical heating drawing machine, a filament winding machine and a filament split machine. The method is characterized in that the auxiliary adding amount is 0.36% to 0.47% of the weight of the HDPE resins, the HDPE resin melt index should meet 0.8 grams / 10minutes to 1.3 grams / 10minutes, and the metallocene LLDPE resin adding amount is 14.3% to 15.7% of the weight of the HDPE resins. The auxiliaries, the HDPE resins and the metallocene LLDPE resins are mixed and stirred uniformly to obtain HDPE / metallocene LLDPE resin mixtures which are fused extruded through the single-screw extruder, the fused extruded primary filaments are cooled and pre-drawn, the pre-drawn filaments are subjected to twice thermal drawing and are wound into round filament beams after un-oiled through high-pressure air flows. The round filament beams are split into round filaments for producing grouper culture nets by the filament split machine.

Description

technical field [0001] The invention relates to the manufacture of round wire for processing grouper breeding nets in the technical field of grouper breeding. Background technique [0002] For aquaculture net cages, grouper breeding nets generally refer to the wire ropes installed on the netting of the grouper breeding cages, and are divided into Horizontal mesh and vertical mesh. Round monofilament is generally referred to as round filament, as people refer to circular polyethylene monofilament as polyethylene round filament; round filament is one of the main fiber materials for the processing of existing grouper cage culture mesh. Based on the fact that the grouper has sharp teeth and will bite the mesh during breeding, compared with ordinary polyethylene round wire in other technical fields, the round wire for mesh processing in this technical field should have high breaking strength and wear resistance. Special properties such as good anti-bite property are not only di...

AI Technical Summary

Problems solved by technology

Based on the fact that the grouper has sharp teeth and will bite the mesh during breeding, compared with ordinary polyethylene round wire in other technical fields, the round wire for mesh processing in this technical field should have high breaking strength and wear resistance. Special properties such as good anti-bite property are not only directly related to the success of the grouper aquaculture industry, but also indirectly related to the breaking strength of the grouper aquaculture net and the safety of its facilities. Process the applicable round silk that meets the above requirements, but the round silk for the processing of grouper breeding nets in the prior art generally takes a single high-density polyethylene resin as raw material and adopts a hot water spinning process for processing, because of the conventional spinning process, Cause its breaking strength to be low (standard index is 5.90g / D), thereby can further influence grouper breeding net class breaking strength and facility safety, so, prior art field adopts as raw material with single high-density polyethylene resin The ordinary polyethylene round yarn processed by hot water spinning process is relatively poor in performance and aquaculture adaptability, and it is difficult to meet the needs of modern grouper aquaculture industry

With the development of the grouper aquaculture industry in China, there is an urgent need for a large number of special new-type round wires with high breaking strength and better wear resistance and anti-bite properties for grouper breeding nets. There is no round yarn for processing grouper breeding nets produced by special modified spinning technology. Therefore, the solution to the problem of round yarns for grouper breeding net processing has become a long-term unresolved technology in the field of grouper breeding technology. problem