JPH03244334A - Fishing-line - Google Patents

Abstract

PURPOSE:To obtain a fishing-line having improved tensile strength, shock resistance, abrasion resistance, resistance to sunlight and resistance to seawater by using a synthetic fiber filament having a fineness of 0.5-20 d, a tensile strength of >=15 g/d, a knot strength of >=10 g/d and an initial modulus of >=500 g/d and composed of an ultrahigh-molecular weight polyethylene having a weight-average molecular weight of >=500,000. CONSTITUTION:A filament of an ultrahigh-molecular weight polyethylene having a weight-average molecular weight of >=500,000 is used as the synthetic fiber filament for a fishing-line obtained by knitting a number of synthetic fiber filaments. The fineness of the filament is preferably 0.5-20 d. The filament is required to have a tensile strength of >=15 g/d, a knot strength of >=10 g/d and an initial modulus of >=500 g/d.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a fishing line suitable for rock fishing.

(Prior Art) In recent years, a fishing method called swim fishing has become widespread and popular as a type of rock fishing.

This taste fishing involves attaching live fish such as white mackerel to a fishing hook and letting it flow over several hundred meters offshore from the shore to catch yellowfin tuna, dogtooth tuna, yellowfin tuna, Japanese yellowtail tuna, yellowfin tuna, yellowtail tuna, swordfish, etc., which are migrating in the middle or upper layers of the ocean. It is a fishing method for catching large fish, and the fishing line has traditionally been made of wire, as well as twisted yarn or braided cord with a thickness of 1000 to several thousand deniers, consisting of many synthetic fiber filaments such as nylon fibers, polyester fibers, and aramid fibers. It was used.

(Problem to be solved by the invention) The important thing in this swimming fishing is to make the active part of the fish swim vigorously for a long time, so the fishing line must be flexible, light, and have good tensile strength, knot strength, and impact resistance. It also needed to have high abrasion resistance, and be thin enough to fit on a reel even if it was several hundred meters long or more.

However, traditional wire binding yarn has a high tensile strength,
Although it had high knot strength, impact resistance, and abrasion resistance, it was unsuitable because it lacked flexibility and was heavy. In addition, fishing lines made of general-purpose synthetic fibers such as nylon and polyester are superior to those made from wire in terms of flexibility and lightness, and in particular, fishing lines made from braided cord are superior to those made from twisted yarn in terms of flexibility. However, it is still insufficient to keep active fish swimming vigorously for long periods of time, and it lacks tensile strength, knot strength, and impact resistance, making the fishing line easy to break when the target fish bites the bait. When the fishing line was made thicker to prevent this, there was a problem that it could not fit on the reel. In addition, fishing line made of aramid fiber,
Although it has slightly better tensile strength, knot strength, and impact resistance than the general-purpose synthetic fibers such as nylon and polyester mentioned above, it has inferior abrasion resistance, and after the target fish bites the bait, it is There was a problem that if you ran into a rocky area, your fishing line would get scraped by the edges of the rocky area and get cut. In addition, this aramid fiber fishing line has low weather resistance, sunlight resistance (UV resistance), and water resistance (seawater resistance), has a short lifespan as a fishing line, is insufficiently flexible, and has a specific gravity similar to that of nylon. 1.45, which is larger than that of polyester and polyester, causes the fishing line to sink into the sea, which, combined with the lack of flexibility mentioned above, prevents the free movement of fish in the active part and makes them tired.

This invention has excellent tensile strength, knot strength, impact resistance, and abrasion resistance, and these properties do not deteriorate even in seawater, allowing the diameter of the fishing line to be made thinner. To provide a braided fishing line suitable for use in bait fishing, which has excellent sunlight resistance (ultraviolet resistance) and water resistance (seawater resistance).

(Means for Solving the Problems) In order to solve the above problems, in the present invention, in a fishing line formed by braiding a large number of synthetic fiber filaments, the weight average molecular weight of the synthetic fiber filaments is 500,000 or more, preferably 100,000 or more. A filament made of ultra-high molecular weight polyethylene of 10,000 or more is used. The fineness of this filament is suitably 0.5 to 20 d, particularly preferably 1 to 5 d. Further, the necessary tensile strength is 15 g/d or more, and particularly preferably 20 g/d or more. Further, the knot strength is required to be 10 g/d or more, and particularly preferably 15 g/d or more. In addition, the required initial elastic modulus is 500 g/
d or more, particularly preferably 800 g/d or more.

The ultra-high molecular weight polyethylene filament used in this invention is disclosed in JP-A-55-14245 and JP-A-5510.
It is a high-strength, high-modulus filament manufactured by the method described in JP-A No. 7506, JP-A-55-5228, and JP-A-59-130313. And this filament has a total fineness of 50 to 200
Focused to 0 denier, heated if necessary,
It is heat-set or subjected to surface treatments such as oiling and coating, and then braided to form two-strand, three-strand, etc. round braids and core braids.

(Function) The physical properties of the ultra-high molecular weight polyethylene filament used in this invention are compared with those of nylon, polyester and aramid fibers as shown in Table 1 below. However, NY in the table is nylon 6, Es is polyester, and Ke
y represents aramid fiber, and oy represents ultra-high molecular weight polyethylene fiber.

Table 1 As shown in Table 1 above, ultra-high molecular weight polyethylene fiber has the highest tensile strength, knot strength, hook strength, and initial elastic modulus compared to other fibers, and has the highest impact resistance and It has better abrasion resistance than conventional aramid fibers, second only to general-purpose fibers such as nylon and polyester, and has extremely good sunlight resistance and seawater resistance. Therefore, by focusing, heating, or WAlling a large number of the above filaments, the tensile strength is 10 to 50 g/d, and the knot strength is 1.
0~40g/d Initial elastic modulus 300~1200g/
d. A fishing line with an elongation of 2 to 10% is obtained. The tensile strength, knot strength, and impact resistance of this fishing line are extremely superior compared to other fibers, allowing the fishing line to be made thinner when fishing for the same size of fish, making it more durable than other fishing lines. You can store a long fishing line on the reel, expand the action range of active fish, and improve fishing results.

Furthermore, this fishing line has a specific gravity of less than 1, floats on water, and is extremely flexible, as evidenced by its high knot strength.

Therefore, it does not interfere with the swimming of the fish in the active part, allowing them to migrate for a long time.

(Example) A multifilament yarn of 1,500 denier and 1,460 filament made of ultra-high molecular weight polyethylene with a weight average molecular weight of 2 million was spun by the method described in JP-A-55-14245, and three of these yarns were used. A three-strand fishing line (Example) with a total fineness of 4500 denier was produced. In addition, a fishing line of a comparative example was manufactured in the same manner as in the above example except that aramid fiber was used.

The fishing lines of the above examples and comparative examples each had a length of 80 mm.
A fishing line of 0 m was prepared, a fishing hook was attached to one end of each line, and a black mackerel was hung on the hook as an active part, and the fishing line was allowed to swim from the shore to the offshore for 3 hours to compare the performance of the above two types of fishing line. The results are shown in Table 2 below. The lifespan of the active parts was tested in sea areas where there were no target fish.

(Blank below) Table 2 Example Comparative example Thickness of fishing line (m) 1.4 1.4 Tensile strength (kg) 139 91 Weight (g
/m) 1. 1 1.6 Number of thread breakages
02 Fishing result of yellowfin horse mackerel (fish) 41 Lifespan of active part (hours) 3.5 1 (Effects of the invention) This invention has excellent tensile strength, impact resistance, abrasion resistance, sunlight resistance, seawater resistance, and The fishing line has high knot strength, has a specific gravity smaller than that of water, and is made by twisting or braiding a large number of ultra-high molecular weight polyethylene filaments with a fineness of 1 to 5 deniers, making it thinner than conventional fishing lines. You can catch big fish, and you can keep active fish swimming over a wide range for long periods of time, which increases your fishing results.

Claims (1)

[Scope of Claims] [1] A fishing line formed by braiding a large number of synthetic fiber filaments, wherein the synthetic fiber filaments are made of ultra-high molecular weight polyethylene with a weight average molecular weight of 500,000 or more, have a fineness of 0.5 to 20 d, and have a tensile strength. A fishing line characterized by being a filament having a knot strength of 15 g/d or more, a knot strength of 10 g/d or more, and an initial elastic modulus of 500 g/d or more.