Method for manufacturing fishing net

A method for manufacturing a fishing net, the method comprising:

• preparing a multifilament yarn formed by bundling a plurality of polyester polyolefin-based core-sheath type composite filaments, in each of which a core component is made of polyethylene terephthalate and a sheath component is made of polyolefin, a mass ratio of the core component and the sheath component being core component sheath component=1 to 3:1;
• preparing a plurality of yarn threads, each yarn thread obtained by paralleling a plurality of the multifilament yarns;
• either twisting the plurality of yarn threads to obtain a net constructed with strands and intersections, or braiding the plurality of yarn threads to obtain a net constructed with strands and intersections:
• heat-treating the net without added pressure to melt the sheath component of the yarn threads constituting the strands and the intersections, followed by solidifying, thus obtaining a plastic net constructed with solidified strands and solidified intersections, in which the core component is existent as an initial fiber form in a matrix formed of the sheath component;
• and
• forming a fishing net using the plastic net.