JP2000201574A - Jig head using biodegradable plastic resin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jig head having a sinker using such a biodegradable plastic resin as to sustainably exhibit its excellent performance during serviceable period, be biodegraded in the natural world after discarded, and be eventually converted to soil organic components or carbon dioxide and water so as not to be persistent and accumulated in the environment. SOLUTION: This jig head using a biodegradable plastic resin is characterized by that, the biodegradable plastic resin is mixed with a high-specific gravity metal such as tungsten with a specific gravity higher than that of lead to form a sinker 2, which, in turn, is mounted with a fishhook 1 and an eye.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a jig head using a biodegradable plastic resin, and more particularly to a jig head using a biodegradable plastic resin which eliminates lead damage and is eventually degraded by microorganisms in nature. Related to a jig head used for lure fishing.

[0002]

2. Description of the Related Art In a conventional jig head of this type, lead or an alloy of lead and tin which is easy to process has been used for a weight. However, harmful substances eluted into the sea of the lead or remained in the fish body, leading to the recognition of lead harm, leading to the suppression of the use of lead. Since then, various alternatives to lead have been researched and developed. As one of the research and development, there is one in which a weight is formed of a high specific gravity component mixed resin obtained by mixing tungsten powder with a nylon resin. However, a weight made of a high-specific-gravity component resin in which tungsten powder is mixed with such a nylon resin fully demonstrates the function of its weight, and is excellent in workability and physical performance. Since the molecular weight nylon resin is not decomposed by microorganisms, any material that has been cut off and brought into the sea due to a broken thread, or that has become intolerable and dumped in the sea will become garbage and contaminate the ocean, and eventually the global environment. Pollution.

[0003]

Therefore, while enduring use, it continuously exhibits excellent performance, and after it is no longer usable and discarded, it is decomposed by microorganisms in the natural world and finally decomposed. It is a first object of the present invention to provide a jig head having a weight using a biodegradable plastic resin which becomes an organic component of soil or carbon dioxide and water and does not remain or accumulate in the environment. A second object of the present invention is to provide a jig head having a weight using a biodegradable plastic resin having physical properties and processability not inferior to conventional plastic resins, while having degradability by microorganisms. I do.

[0004]

According to the present invention, a weight 2 is formed by mixing a high specific gravity metal such as tungsten having a higher specific gravity than lead and a biodegradable plastic resin, and a fishing hook 1 is connected to the weight. A jig head using a biodegradable plastic resin, wherein an eye portion is provided on the weight.

[0005]

The weight 2 has a base made of a mixture of tungsten powder having a higher specific gravity than lead and a biodegradable plastic resin, and the base of the hook 1 and the legs of the eye fittings are embedded in the weight by a mold. It is formed by molding in such a state. This eye fitting can be formed integrally with the hook 1, or can be formed as a separate member from the hook 1. further,
The eye (eyeball portion) can protrude from the surface of the weight (see FIG. 2), or can be buried in the weight without protruding from the surface of the weight. In addition, as shown in FIG. 1, the weight may be provided with a through hole 3 so that the eye fitting is not used. The weight 2 configured in this way can be made heavier than the specific gravity of a 100% lead weight, but the specific gravity changes the distribution of the amount of high specific gravity tungsten and the amount of biodegradable plastic resin. Can be adjusted by The biodegradable plastic resin must be degradable by microorganisms and have physical properties and processability comparable to those of conventional plastic resins. The biodegradable plastic resin composed of the polymer produced by the microorganism according to claim 2 includes biopolyester. Among them, the copolyester is a biopolysynthesis of the copolyester in the body of the microorganism by culturing the microbe in a fermenter, and then treating it with an organic solvent to take out the copolyester from the microbial cells and pelletize it. To be produced. Here, the ICI thus produced by fermentation is
Use the Bio Pole. Such a biopolyester is decomposed by microorganisms in the natural world and has a thermoplastic property that it is melted at around 180 ° C. in addition to being biodegradable into carbon dioxide and water. Other biodegradable plastic resins composed of macromolecules produced by microorganisms include microbial polysaccharides such as curdlan and pullulan, bacterial cellulose, and polyamino acids. Claim 3
Among the biodegradable plastic resins composed of natural polymers described above, there are those utilizing cereal starch. In this method, dry starch is kneaded into low-density polyethylene together with a small amount of autoxidizer, and is produced as master batch pellets of an intermediate material. This masterbatch contains 40% by weight of starch. Other biodegradable plastic resins composed of natural polymers include chitin-chitosan, marine polysaccharides, and cellulose. The biodegradable plastic resin composed of the polymer produced by the chemical synthesis according to claim 4 includes aliphatic polyester polylactic acid and polyglycolic acid. The polylactic acid or polyglycolic acid is produced by chemically dehydrating lactic acid or glycolic acid. The polylactic acid or polyglycolic acid produced in this way is hydrolyzed into lactic acid or glycolic acid by the action of an acid or an alkali in a living body, and excreted out of the body by metabolism. Other biodegradable plastic resins composed of polymers produced by chemical synthesis include polycaprolactone, an aliphatic polyester similar to polylactic acid and polyglycolic acid, polyurethane resins, polyamide resins, polyvinyl alcohol, polyether, and the like.

[0006]

Embodiment 1 In this embodiment, a biodegradable plastic resin composed of a polymer produced by the microorganism according to claim 2 is:
A biopole manufactured by ICI Co., Ltd., which is produced by fermenting a copolymerized polyester taken out of the cells of a microorganism as pellets, is used. The mixing ratio of the biopole and the tungsten powder having a higher specific gravity than lead differs depending on the final specific gravity of the weight 2, but the biopole is 5-2 to 5 in weight ratio.
Forming is performed by a normal forming process with 0% and 95-80% tungsten. The mixing of the biopole and the tungsten is performed by a high-speed rotating machine so that the materials having different specific gravities are uniformly mixed. The melting temperature of the mixture must be at least 180 ° C. At the time of the forming process, as shown in FIG.
The jig head is formed by molding such that the two legs 4 "of the hook 4 are embedded. The base end of the hook 1 is formed in an annular shape, and the two legs 4" of the eye fitting 4 are received therein. Strengthen the fixation. Although the eye protrudes from the surface of the weight 2, it can be buried therein. As shown in FIG. 1, the weight 2 is not used and the through hole 3 is not used.
Can also be formed. Furthermore, it is also possible to bend the base end portion of the fishing hook 1 and configure that portion as the eye fitting 4.

[0007]

Example 2 In this example, as a biodegradable plastic resin composed of a natural polymer, corn dried starch powder was kneaded with a small amount of autoxidizer into low-density polyethylene by a high-speed mixer, and an intermediate raw material of uniform material was obtained. Used in the form of pellets as a masterbatch. This masterbatch contains 40% by weight of starch. In mixing this master batch with tungsten powder having a higher specific gravity than lead, the master batch is added so that the weight 2 contains 10 to 15% starch. The masterbatch is stable up to 230 ° C and must be processed at a lower temperature. Other configurations, operations, and effects are the same as those of the first embodiment.

[0008]

Embodiment 3 In this embodiment, aliphatic polyester polylactic acid or polyglycolic acid is used as a biodegradable plastic resin composed of a polymer produced by chemical synthesis. The polylactic acid is produced by chemically dehydrating a lactic acid produced by fermenting sugar glucose with lactic acid bacteria. Polyglycolic acid is produced by chemically reacting glycolic acid with a dehydration polycondensation reaction. The mixing ratio of the polylactic acid or polyglycolic acid powder and the tungsten powder having a higher specific gravity than lead differs depending on the final desired specific gravity of the weight 2, but the weight ratio of the polylactic acid or polyglycolic acid powder is Forming is performed by a normal forming process with 5 to 20% and tungsten being 95 to 80%. Mixing of polylactic acid or polyglycolic acid and tungsten is performed by a high-speed rotating machine to make the mixing of materials having a difference in specific gravity uniform. Polyglycolic acid is 23
Since the crystal melting temperature is as high as 0 to 240 ° C., the melting temperature of the mixture is at least higher. Polylactic acid or polyglycolic acid is glycolic acid, DL lactic acid,
By combining the monomer of L-lactic acid, materials from amorphous to crystalline can be freely chemically synthesized from rubbery soft materials to hard materials, so that they are more useful as raw materials.
Other configurations, operations, and effects are the same as those of the first embodiment.

[0009]

The present invention is a jig head characterized in that the weight is made of a mixture of a high specific gravity metal such as tungsten having a higher specific gravity than lead and a biodegradable plastic resin. Exhibits its performance continuously, and after disposal, it is decomposed by microorganisms in the natural world and eventually becomes organic components of soil and carbon dioxide and water, and does not remain and accumulate in the environment, especially Has the effect of contributing to the problem of marine pollution. The biodegradable plastic resin used in the present invention has a decomposability by microorganisms and can be sufficiently molded in a conventional molding step, and has an effect of having strength and processability not inferior to conventional plastic resins. In this way, lead damage is eliminated, and a plastic resin that is not permanently decomposed as in the past is not required, thereby contributing to environmental pollution and waste problems.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a jig head using the biodegradable plastic resin of the present invention, wherein a weight has a through hole without using an eye fitting.

FIG. 2 is a cross-sectional view of another jig head using the biodegradable plastic resin of the present invention, in which a weight uses an eye fitting that is a separate member from a fishing hook, and an eye protrudes from the surface of the weight. I have.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Fishing hook 2 Weight 3 Through-hole 4 Eye fitting 4 'Eye 4 "Leg

Claims (4)

[Claims] 1. A weight 2 comprising a mixture of a high specific gravity metal such as tungsten having a higher specific gravity than lead and a biodegradable plastic resin.
A jig head using a biodegradable plastic resin, wherein a fishing hook 1 is coupled to the weight and an eye is provided on the weight. 2. The jig head using a biodegradable plastic resin according to claim 1, wherein the biodegradable plastic resin is composed of a polymer produced by microorganisms. 3. The jig head according to claim 1, wherein the biodegradable plastic resin is made of a natural polymer. 4. The jig head using a biodegradable plastic resin according to claim 1, wherein the biodegradable plastic resin is composed of a polymer produced by chemical synthesis.