Method for manufacturing fishing net

Patent metadata

Field	Value
Publication number	US-10808342-B2
Application number	US-201816033904-A
Country	US
Kind code	B2
Filing date	Jul 12, 2018
Priority date	Jul 14, 2017
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

Provided is a method for manufacturing a fishing net formed from a plastic net that can be handled by winding or folding although the net has plastic rigidity. The fishing net is manufactured by (1) a step of preparing a multifilament yarn formed by bundling a plurality of 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, (2) a step of preparing a yarn thread obtained by paralleling a plurality of the multifilament yarns, (3) a step of twisting or braiding four yarn threads 11, 12, 13, 14 to obtain a net constructed with strands 1 and intersections 2 , (4) a step of heat-treating the net under without pressure to melt the sheath component of the yarn threads 11, 12, 13, 14 constituting the strands 1 and the intersections 2 , followed by solidifying, thus obtaining a plastic net, and (5) a step of forming the fishing net using the plastic net.

First claim

What is claimed is:

1. 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.

2. The method according to claim 1 , wherein the polyolefin is polyethylene.

3. The method according to claim 1 , wherein the plurality of yarn threads are twisted when braided.

4. The method according to claim 1 , wherein the intersections are knotless.

Assignees

• Unitika Ltd

Inventors

• Andoh Hidehito
• Ikeda Kohei

Classifications

• A01K75/00 Primary

  Accessories for fishing nets; Details of fishing nets, e.g. structure · CPC title

• D02G3/04

  Blended or other yarns or threads containing components made from different materials · CPC title

• D01C1/02

  by chemical methods to obtain bast fibres · CPC title

• B29C66/4346

  Joining substantially flat articles for forming cross connections, e.g. for making X-shaped pieces · CPC title

• B29C66/05

  Particular design of joint configurations · CPC title