Elastic microporous film trawl net bag

Abstract

The invention discloses an elastic microporous film travel net bag which comprises an inner net bag and an outer net bag. The inner net bag and the outer net bag are identical in size, openings of theinner net bag and the outer net bag are woven together and connected with a tail-end opening of a netting of a trawl net, and dragging operation is performed by a fishing boat. The inner net bag is made of an elastic thin film material, and the surface of the inner net bag is uniformly distributed with small holes; when operation starts, the inner net bag is low in drainability, and water in theinner net bag is relatively full, so that sufficient unfolding of the inner net bag in working conditions is facilitated; when elastic thin films of the inner net bag bear high pressure, the surface of the inner net bag extends, the small holes expand, dragging force is reduced and gradually tends to balance, and effect of conventional net bags is realized to capture fishes. The outer net bag is alow-mesh netting and provides grid support to the inner net bag in an extending state, so that service life of the elastic thin film material is prolonged, and the inner net bag is uniformly stressedin grids of the outer net bag.

Description

technical field [0001] The invention relates to a trawl mesh bag, in particular to an elastic film trawl mesh bag with small holes, which belongs to the field of marine fishery. Background technique [0002] The working principle of trawling is that the ship drags the bag-type fishing net to fish in the sea area it passes through. The net bag is the net bag at the end of the trawl to collect the catch. In the trawl fishing operation, there are some shortcomings in the trawl using the traditional mesh bag, such as the truss hanging bag single bag trawl mentioned in the patent of CN103039407A and the parallel multi-group mentioned in the patent of CN103478089A For bag trawl, the whole top trawl net is connected by meshes of different sizes. The mesh size of the mesh part is the smallest, and the water permeability is high, which is not conducive to the full expansion of the mesh bag under working conditions. The invention provides an elastic small-pore film trawl mesh bag, wh...

AI Technical Summary

Problems solved by technology

In the trawl fishing operation, there are some shortcomings in the trawl using the traditional mesh bag, such as the truss hanging bag single bag trawl mentioned in the patent of CN103039407A and the parallel multi-group mentioned in the patent of CN103478089A For bag trawl, the whole top trawl net is connected by meshes of different sizes. The mesh size of the mesh part is the smallest, and the water permeability is high, which is not conducive to the full expansion of the mesh bag under working conditions.

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