fishing bait

Abstract

To provide a fishing bait in which the components of the bait material are easily released to the outside. [Solution] The fishing bait (1) comprises a first substrate (10) whose main component is polyvinyl alcohol and which has a first main surface (100) and a second main surface (110) opposite the first main surface (100), and a second substrate (20) which is bonded to the second main surface (110) of the first substrate (10) and which has a bait material as its main component and contains polyvinyl alcohol.

Description

[Technical Field]

[0001] The present invention relates to a fishing bait, and more particularly to a flat fishing bait. [Background technology]

[0002] Conventionally, fish feed has been known which is characterized by comprising an outer layer constructed by heat gelling of protein and / or starch and an inner layer made of a composition containing nutritional components, the essential ingredients of which are fish meal and oils and fats, and in which the oil and fat in the inner layer is oil and fat containing fish oil and hardened oil having a melting point of 50°C or higher (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-65565 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional feeds described in Patent Document 1 and the like, a composition containing nutritional components is present in the inner layer, and the inner layer is covered with an outer layer, making it difficult for the nutritional components to be released to the outside.

[0005] Therefore, an object of the present invention is to provide a fishing bait that allows the components of the bait to be easily released to the outside. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a flat fishing bait, comprising a first substrate containing polyvinyl alcohol. On one side, Feeding material and Polyvinyl alcohol Lu Containing second substrate and when a tensile test is carried out using a rheometer under the conditions of a tensile speed of 300 mm / min and an extension of the fishing bait of 25 mm, the overlapping surfaces are bonded without peeling, The surface of the second substrate opposite to the surface bonded to the first substrate is exposed to the outside. are Fishing bait is provided. [Effects of the Invention]

[0007] According to the fishing bait of the present invention, it is possible to provide a fishing bait in which the components of the bait material are easily released to the outside. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a schematic diagram of a fishing bait according to an embodiment of the present invention. [Figure 2] FIG. 10 is a schematic diagram of a fishing bait according to another example of the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] [Embodiment Mode] <Bait 1 Overview> The fishing bait 1 according to this embodiment has a generally flat plate shape and is constructed with a laminated structure including a layer that primarily holds a fishhook or the like and a layer that is partially exposed and primarily releases bait components to the outside. To prevent fish bait attached to a fishhook from immediately dispersing in the water when the bait is dropped into the water, the bait components have traditionally been covered with a specific material so that the bait components are on the inside. However, this type of construction makes it difficult for the bait materials to disperse in the water. On the other hand, simply exposing the bait components to the outside to facilitate dispersal in the water makes it difficult to attach to a fishhook because the bait components are difficult to solidify. Furthermore, the bait materials disperse immediately in the water when dropped into the water, making them unusable as fishing bait. The inventors therefore conducted extensive research into the structure and composition of a fishing bait that is not only easily attached to a fishhook or the like but also allows the bait materials to continue dispersing in the water over a certain period of time when dropped into the water, and as a result, came up with the idea for the fishing bait according to this embodiment.

[0010] That is, the fishing bait 1 of this embodiment is composed of a first substrate having polyvinyl alcohol as its main component and having a first main surface and a second main surface opposite to the first main surface, and a second substrate joined to the second main surface of the first substrate, having a bait material as its main component and containing polyvinyl alcohol.

[0011] In the fishing bait 1 having such a configuration, the first substrate is primarily composed of a polymeric material that easily maintains its shape even in water, so it maintains its structure even when a fishhook or other object is pierced through the first substrate. Meanwhile, the second substrate is flat and primarily composed of a bait material, with one side bonded to one side of the first substrate, so that one side of the second substrate is not exposed to water, while the other side is. Furthermore, since the second substrate is composed of the same material as the first substrate, one side of the first substrate and one side of the second substrate are inseparably bonded (i.e., fused) together. Furthermore, since the second substrate contains the same material as the first substrate and contains the bait material as a primary component to the extent that it maintains its shape as a substrate when layered, it maintains its shape in the same way as the first substrate. As a result, when the fishing bait 1 is cast into water, the bait material diffuses into the water from the other side of the second substrate, allowing the overall shape of the fishing bait 1 to be maintained in water. Therefore, according to the fishing bait 1, since the bait material components continue to diffuse into the water while remaining properly attached to the fishing hook for a predetermined time after being cast into the water, good fishing results can be expected.

[0012] <Details of Bait 1> Fig. 1 shows an outline of the structure of an example of a fishing bait according to this embodiment. Specifically, Fig. 1(a) shows an outline of an example of a plan view (upper side of Fig. 1(a)) and a side view (lower side of Fig. 1(a)) of the fishing bait 1, and Fig. 1(b) shows an outline of a virtual circumscribing circle of the fishing bait 1 in a plan view of the fishing bait 1.

[0013] (Bait 1 composition) As shown in Figure 1(a), the fishing bait 1 comprises a first substrate 10 and a second substrate 20 bonded to one side of the first substrate 10. The first substrate 10 and the second substrate 20 are bonded to each other at a bonding region 30. The fishing bait 1 is in the form of a flat plate or thin plate, and is configured to have a predetermined shape in plan view.

[0014] (Shape and size of fishing bait 1) The shape and size of the fishing bait 1 are not particularly limited as long as it is flat or thin. However, the shape and / or size may be adjusted as appropriate depending on the species of fish being caught. The shape of the fishing bait 1 may be any of a variety of shapes that can form an imaginary circumscribing circle 5 in a plan view, as shown in FIG. 1(b). For example, the shape of the fishing bait 1 may be rectangular, triangular (equilateral triangle, right triangle, isosceles triangle, etc.), elliptical, trapezoidal, star-shaped, polygonal, or irregular. The size of the fishing bait 1 is also not particularly limited. For example, if the fishing bait 1 is in the shape of a right triangle, it may have a base of approximately 2.5 cm, a height of approximately 13 cm, and a thickness of approximately 1.2 cm.

[0015] (1st base material 10) The shape of the first substrate 10 is the same as that of the fishing bait 1 described above. Furthermore, the size of the first substrate 10 is the same as that of the fishing bait 1 described above, except for the thickness. There are no particular limitations on the thickness of the first substrate 10, but it may be the same thickness as or thinner than the thickness of the second substrate 20 described below, and may be, for example, about 4 mm.

[0016] The main component of the gelling agent of the first substrate 10 is polyvinyl alcohol, and the first substrate 10 has a first main surface 100 and a second main surface 110 opposite to the first main surface 100. In this specification, "mainly composed of polyvinyl alcohol (or a water-soluble polymer)" means that the proportion (content) of polyvinyl alcohol in the first substrate 10 exceeds 3 wt % with respect to the total weight of the first substrate 10.

[0017] In this embodiment, the concentration of polyvinyl alcohol in the first substrate 10 is preferably 3 wt% or more and less than 20 wt%, and more preferably 8 wt% or more and less than 15 wt%, from the viewpoint of improving the hook retention of the fishing bait 1. Note that, in addition to polyvinyl alcohol, the first substrate 10 may also contain approximately 3 wt% or more and 10 wt% or less of a specific alcohol (propylene glycol and / or glycerin, etc.) from the viewpoint of improving moisture retention and physical properties. Furthermore, the first substrate 10 may contain, in addition to polyvinyl alcohol, a water-soluble polymer selected from the group consisting of xanthan gum, locust bean gum, carrageenan, guar gum, sodium alginate, gellan gum, psyllium seed gum, agar, etc.

[0018] (2nd base material 20) The shape of the second substrate 20 is the same as the shape of the fishing bait 1 described above. Furthermore, the size of the second substrate 20 is the same as the size of the fishing bait 1 described above, except for the thickness. There are no particular limitations on the thickness of the second substrate 20, but it may be the same thickness as or thicker than the first substrate 10, for example, about 8 mm.

[0019] The second substrate 20 is composed primarily of a feed material and contains polyvinyl alcohol, and has a first main surface 200 and a second main surface 210 opposite to the first main surface 200. The second main surface 210 of the second substrate 20 is bonded to the second main surface 110 of the first substrate 10. The surface of the second substrate 20 opposite to the side bonded to the first substrate 10 (i.e., the first main surface 200) is configured to be exposed to the outside. In this specification, "composed primarily of a feed material" means that the proportion (content) of the feed material (or feed material components) in the second substrate 20 exceeds 30 wt% with respect to the total weight of the second substrate 20.

[0020] The bait material contained in the second substrate 20 can be determined appropriately depending on the species of fish to be caught. For example, the bait material may contain at least one bait material selected from the group consisting of animals and plants generally used as fishing bait (animals and plants for fishing bait) and aquatic organisms.

[0021] In this embodiment, the concentration of the bait material in the second substrate 20 is preferably 30 wt% or more and less than 90 wt% from the viewpoint of facilitating diffusion of the bait material in water while maintaining the shape of the second substrate 20 even when the bait material is contained. The concentration of polyvinyl alcohol in the second substrate 20 is preferably 0.5 wt% or more and less than 10 wt%, and more preferably 1 wt% or more and less than 5 wt%, from the viewpoint of maintaining the shape of the second substrate 20 in the fishing bait 1. Like the first substrate 10, the second substrate 20 may also contain, in addition to polyvinyl alcohol, approximately 3 wt% or more and 10 wt% or less of a predetermined alcohol, and may also contain, in addition to polyvinyl alcohol, a water-soluble polymer selected from the group consisting of xanthan gum, locust bean gum, carrageenan, guar gum, sodium alginate, gellan gum, psyllium seed gum, agar, and the like.

[0022] (Joint area 30) Here, polyvinyl alcohol, which is the main component of the first substrate 10, and polyvinyl alcohol of the second substrate 20 are the same material. Structures made of polyvinyl alcohol are easily bonded and fused to each other. Therefore, the first substrate 10 and the second substrate 20 are bonded / fused at the bonding region 30, and the first substrate 10 and the second substrate 20 become an inseparable unit. In other words, the second main surface 110 of the first substrate 10 and the second main surface 210 of the second substrate 20 are bonded to each other and become an inseparable unit at the bonding region 30. This is because the polyvinyl alcohol of the first substrate 10 and the polyvinyl alcohol of the second substrate 20 are bonded to each other at the bonding region 30 by hydrogen bonding or the like. As a result, the first substrate 10 and the second substrate 20 are bonded to each other and become an inseparable unit at the bonding region 30.

[0023] (Polyvinyl alcohol) There are no particular limitations on the polyvinyl alcohol used for the first substrate 10 and the second substrate 20, but from the viewpoint of providing good hook retention properties to the fishing bait 1, for example, the average degree of polymerization calculated by the viscosity method is preferably 300 or more, more preferably 2,500 or more, and even more preferably 4,000 or more, and from the viewpoint of providing a predetermined flexibility, etc., the average degree of polymerization is preferably 4,500 or less, more preferably 4,000 or less, and even more preferably 3,300 or less.

[0024] There are no particular limitations on the degree of saponification of polyvinyl alcohol, but from the viewpoint of allowing the fishing bait 1 to exhibit a predetermined flexibility, etc., it is preferably 70 mol % or more, more preferably 90 mol % or more, and even more preferably 95 mol % or more.

[0025] (Relationship between the diameter of the circumscribed circle of triangular bait 1 in a plan view and the thickness of bait 1) The fishing bait 1 according to this embodiment can have various shapes, such as a square or a polygon. For example, the fishing bait 1 may be triangular (triangular) in plan view, as shown in FIG. 1(a). In the triangular fishing bait 1 according to this embodiment, in order to strengthen the bond between the first substrate 10 and the second substrate 20 and prevent the second substrate 20 from peeling off from the first substrate 10, as shown in FIG. 1(b), the ratio t / D of the total thickness t of the first substrate 10 and the second substrate 20 to the diameter D of the circumscribing circle 5 of the first substrate 10 (or the fishing bait 1 or the second substrate 20) in plan view of the first substrate 10 (or the fishing bait 1 or the second substrate 20) is preferably less than 1, and also preferably 0.5 or less. When the ratio t / D satisfies this relationship, peeling off between the first substrate 10 and the second substrate 20 can be prevented when the fishing bait 1 is cast into water and a fish bites the fishing bait 1.

[0026] 2, in this embodiment, when the shape of the first substrate 10 in a plan view is polygonal (FIG. 2 shows an example of a heptagon with a depression), as long as it is possible to form a virtual circle including at least two vertices selected from the multiple vertices of the first substrate 10, for example, not all vertices of the polygonal first substrate 10 need to be on the circumference of the virtual circle (in the example of FIG. 2, a virtual circle (virtual circle 7) is formed by vertices 60 and 62, and vertices other than vertices 60 and 62 are not located on virtual circle 7). In this case, L is the distance between two points where the length of the line segment is longest, among the multiple vertices of the first substrate 10 located on the circumference of the virtual circle and / or two points selected from the intersections of the multiple vertices of the first substrate 10 and the virtual circle with the sides of the first substrate 10 (i.e., the sides of the polygon). As an example, in Figure 2, vertices 60 and 62 of the first substrate 10 are located on an imaginary circle 7, and intersections 70, 72, 74, and 76 are located where the imaginary circle 7 intersects with the sides of the first substrate 10. Therefore, in Figure 2, the distance between vertex 62 and intersection 70, where the length of the line segment is longest, is distance L. The ratio t / L of the total thickness t of the first substrate 10 and the second substrate 20 to distance L is preferably less than 1, and also preferably 0.5 or less. By satisfying this relationship for ratio t / L, peeling between the first substrate 10 and the second substrate 20 can be prevented when the fishing bait 1 is thrown into water and a fish bites the bait 1.

[0027] (Bonding strength between first substrate 10 and second substrate 20) The bond between the first substrate 10 and the second substrate 20 is sufficient can be verified by the presence or absence of peeling during a tensile test using a rheometer. The fishing bait 1 is cut into squares measuring 1 cm on each side in plan view, and a fishhook is inserted into the first substrate 10 of the cut fishing bait 1 at a predetermined position, and a fishhook is also inserted into the second substrate 20 at a predetermined position. One end of the fishing line attached to the fishhook on the first substrate 10 side and one end of the fishing line attached to the fishhook on the second substrate 20 side are then fixed to connection points on the rheometer, and a tensile test is performed at a predetermined tensile speed. By confirming that the bonded portion does not peel off and the second substrate 20 tears from the needle-inserted portion, it can be confirmed whether the bond strength is sufficient.

[0028] (Elasticity of the first substrate 10 and the second substrate) The first substrate 10 and the second substrate 20 according to this embodiment are both solidified bodies. That is, from the viewpoint of making it easier to attach a fishhook to the fishing bait 1 and ensuring that its shape is sufficiently maintained in water, the gel strength (jelly strength) of the first substrate 10 measured with a rheometer is quantified as the breaking strength (N) or maximum stress (N) in a compression test, and is preferably 13 (N) or more, more preferably 17 (N) or more. Similarly, the gel strength of the second substrate 20 measured with a rheometer is preferably 4 (N) or more, more preferably 5 (N) or more. In this embodiment, the gel strength of the first substrate 10 is preferably greater than the gel strength of the second substrate 20, and the difference between the gel strengths of the first substrate 10 and the second substrate 20 is preferably 9 (N) or more, and more preferably 50 (N) or less.

[0029] <Effects of the embodiment> The fishing bait 1 according to this embodiment has a first substrate 10 made primarily of polyvinyl alcohol and a second substrate 20 made primarily of a bait material and containing polyvinyl alcohol, which allows it to maintain a layered shape, bonded at a predetermined surface. Therefore, when the fishing bait 1 is dropped into water, the bait material components can be easily diffused into the water from the surface of the second substrate 20 that is not bonded to the first substrate 10. Furthermore, since both the first substrate 10 and the second substrate 20 in the fishing bait 1 contain polyvinyl alcohol, the first substrate 10 and the second substrate 20 are bonded together inseparably at a predetermined surface. Therefore, when the fishing bait 1 is dropped into water or when a fish bites it, the second substrate 20 can be prevented from peeling off from the first substrate 10. Experimental Example

[0030] The present invention will be explained in more detail below by way of experimental examples. It goes without saying that the experimental examples are merely illustrative and should not be construed as limiting.

[0031] (Experimental Example 1) A sample for Experimental Example 1, triangular in plan view, with a base of 2.5 cm and a height of 13 cm, was prepared as follows. Specifically, predetermined amounts of polyvinyl alcohol and water were mixed and heated to melt, followed by the addition of propylene glycol and xanthan gum dispersed in glycerin. The mixture was then reheated, frozen (to -23°C), and thawed to prepare a first substrate 10 with a polyvinyl alcohol concentration of 9.0 wt% (thickness: 4 mm). Similarly, a separately prepared first substrate 10 was combined with bait (minced sardines) to prepare a second substrate 20 with a bait concentration of 66.6 wt% and a polyvinyl alcohol concentration of 3.0 wt% (thickness: 8 mm). Next, one side of the second substrate 20 was overcoated on one side of the first substrate 10 to bond the second substrate 20 to the first substrate 10, thereby obtaining a fishing bait sample for Experimental Example 1.

[0032] Similarly to Experimental Example 1, samples according to Experimental Examples 2 and 3, in which the polyvinyl alcohol concentrations of the first substrate 10 and the second substrate 20 were changed, and Comparative Example A were also prepared. Specifically, the polyvinyl alcohol concentration of the first substrate 10 of the sample according to Experimental Example 2 was 8.5 wt%, and the polyvinyl alcohol concentration of the second substrate 20 was 2.8 wt%. The polyvinyl alcohol concentration of the first substrate 10 of the sample according to Experimental Example 3 was 8.0 wt%, and the polyvinyl alcohol concentration of the second substrate 20 was 2.6 wt%. The polyvinyl alcohol concentration of the first substrate 10 of the sample according to Comparative Example A was 8.5 wt%, and the polyvinyl alcohol concentration of the second substrate 20 was 2.8 wt%. However, the sample according to Comparative Example A has a configuration in which the first substrate is bonded to both sides of the second substrate, and is therefore structurally different from the samples according to Experimental Examples 1 to 3. Furthermore, as a comparative sample (comparison product B) for the tensile test, a sample was prepared in which the polyvinyl alcohol constituting the first substrate 10 was replaced with an agar material (prepared with an agar material concentration of 1 wt %).

[0033] <Tensile test> A fishhook (manufactured by Hayabusa Corporation, product name Kyogi Kisu No. 7) was inserted into the center of the first substrate 10 of the sample according to Experimental Example 1, and another fishhook (manufactured by Hayabusa Corporation, product name Kyogi Kisu No. 7) was inserted into the center of the second substrate 20. One end of the fishing line attached to the fishhook on the first substrate 10 side and one end of the fishing line attached to the fishhook on the second substrate 20 side were fixed to the mounting portion of a rheometer (manufactured by Sun Scientific Corporation, Rheometer CR-500DX), and a tensile test was performed under conditions of a tensile speed of 300 mm / min and a sample elongation of 25 mm. Similar tensile tests were also performed on the samples according to Experimental Examples 2 and 3, and the comparative samples (Comparative Products A and B).

[0034] <Gel strength test> The gel strength of the first substrate 10 and the second substrate 20 of the sample according to Experimental Example 1 was measured as follows.

[0035] The gel strength of the first substrate 10 sample according to Experimental Example 1 was measured using a rheometer (Rheometer CR-500DX manufactured by Sun Scientific Co., Ltd.) under the following conditions. ·Measurement speed: 60mm / min 10mm diameter cylindrical plunger Maximum load: 100N ·Environmental temperature: 22.6℃

[0036] The gel strength was also measured in the same manner for the second substrate 20 of the sample according to Experimental Example 1. The gel strength was also measured in the same manner for the samples according to Experimental Examples 2 and 3. The gel strengths of the first substrate 10 and the second substrate 20 of Comparative Product A and Comparative Product B were measured. Here, for Comparative Product B, the gel strength of the first substrate 10 made of an agar material was measured.

[0037] <Measurement of the concentration of bait dispersed in water> A sample according to Experimental Example 2 was dropped into water, and the change in the bait concentration in the water before and after the sample was dropped was measured. Specifically, the entire sample according to Experimental Example 2, in which 8 g of a sheet of the second substrate 20 (equivalent to 5.336 g of bait) was bonded to one side of a 4 g sheet of the first substrate 10, was dropped into 0.4 L of 3.4% salt water at 21.7°C, allowed to stand for 2 minutes, and then the sample was recovered. The bait concentration in the water after the sample was dropped was confirmed by measuring the amount of amino acids. (Note that the amount of amino acids in the water before the sample was dropped was 0.0 g / 1 g of water.) The bait concentration after the sample was left to stand in the salt water for 5 minutes was also measured. The bait concentration in the salt water after the sample was left to stand for 2 minutes and 5 minutes was also measured for a comparative sample (Comparative Product A).

[0038] The sample of Experimental Example 2 described above has a structure in which an 8g sheet of the second substrate is bonded to one side of a 4g sheet of the first substrate, and is therefore dropped into water with one side of the second substrate exposed. On the other hand, for the comparative sample (Comparative Product A), the first substrate is bonded and molded to both sides of the second substrate so that neither flat surface of the second substrate is exposed to water. In other words, in Comparative Product A, the second substrate is sandwiched between two first substrates. Therefore, only the side surfaces of the second substrate of Comparative Product A are exposed to water, and Comparative Product A has a structure that makes it less likely for the bait material to diffuse into water than the sample of Experimental Example 2. In other words, when the fishing bait 1 corresponding to the sample of Experimental Example 2 is dropped into water, the bait material is more likely to diffuse into water from the other side of the second substrate (the side not bonded to the first substrate). Furthermore, because one side of the second substrate is bonded to the first substrate, the first substrate supports the second substrate, allowing the fishing bait 1 to maintain its overall shape in water.

[0039] The amino acid content was specifically measured as follows. First, 0.4 L of 3.4% salt water was placed in each of four beakers (beakers 1 to 4). Next, the sample of Experimental Example 2 was placed in the first beaker so that it was completely immersed, and left to stand for 2 minutes. The sample of Comparative Product A was placed in the second beaker so that it was completely immersed, and left to stand for 2 minutes. Next, the sample of Experimental Example 2 after standing in the first beaker for 2 minutes and the sample of Comparative Product A after standing in the second beaker for 2 minutes were each removed. The sample of Experimental Example 2 removed from the first beaker was then placed in the third beaker so that it was completely immersed, and left to stand for 3 minutes before being removed. Similarly, the sample of Comparative Product A removed from the second beaker was placed in the fourth beaker so that it was completely immersed, and left to stand for 3 minutes before being removed. Thereafter, the amino acid concentrations in the brine were measured in the first beaker (sample of Experimental Example 2 was allowed to stand for 2 minutes), the second beaker (sample of Comparative Product A was allowed to stand for 2 minutes), the third beaker (sample of Experimental Example 2 was allowed to stand for 3 minutes), and the fourth beaker (sample of Comparative Product A was allowed to stand for 3 minutes). The amino acid concentrations were measured using a Prominence amino acid analysis system manufactured by Shimadzu Corporation.

[0040] The experimental examples and the measurement results are shown in Table 1. The gel strength of the first base material 10 of the comparative product B indicates the gel strength of the first base material 10 containing 1% agar material.

[0041] [Table 1]

[0042] The measurement results of the concentration of the bait material diffused in the water are shown in Table 2. In Table 2, the measured values ​​of the amino acid content after 5 minutes of standing in Experimental Example 2 and Comparative Product A are the sum of the measured values ​​after 2 minutes of standing and the measured values ​​after 3 minutes of standing.

[0043] [Table 2]

[0044] In Table 2, the amount of amino acids in water is expressed as the mass (g) per gram of water. Additionally, Asp refers to aspartic acid, Thr refers to threonine, Ser refers to serine, Asn refers to asparagine, Glu refers to glutamic acid, Gln refers to glutamine, Pro refers to proline, Gly refers to glycine, Ala refers to alanine, Val refers to valine, (Cys)2 refers to cystine, Met refers to methionine, Ile refers to isoleucine, Leu refers to leucine, Tyr refers to tyrosine, Phe refers to phenylalanine, Trp refers to tryptophan, His refers to histidine, Lys refers to lysine, Arg refers to arginine, and Taurine refers to taurine. The ratio of the amount of elution from Comparative Product A was calculated by dividing the amount of amino acids in water in Experimental Example 2 by the amount of amino acids in water in Comparative Product A.

[0045] As can be seen from Table 1, in the sample of Experimental Example 1, the second substrate was observed to tear from the needle puncture site during the tensile test without peeling of the bonded portion. The bond strength at that time was 18.6 N. Here, the gel strength of the first substrate 10 of the sample of Experimental Example 1 was 52.7 N, and the gel strength of the second substrate 20 was 10.1 N, indicating that the first substrate 10 and the second substrate 20 were firmly bonded and that both the first substrate 10 and the second substrate 20 were coagulated. Furthermore, as can be seen from Table 2, the sample of Experimental Example 2 was more likely to disperse the bait into water when dropped into water than the comparative sample (Comparative Product A), as shown by measuring the amino acid content in the water after dropping the sample. Specifically, regardless of whether the standing time was 2 minutes or 5 minutes, the amount of amino acids that diffused into water from the sample of Experimental Example 2 was approximately four times the amount of amino acids that diffused into water from Comparative Product A. Furthermore, in the tensile test of the sample according to Experimental Example 2, it was observed that the second substrate tore without peeling at the bonded portion. The bond strength at that time was 15.1 N. Here, the gel strength of the first substrate 10 of the sample according to Experimental Example 2 was 32.6 N, and the gel strength of the second substrate 20 was 7.8 N, which similarly indicated that the first substrate 10 and the second substrate 20 were firmly bonded and that both the first substrate 10 and the second substrate 20 were solidified bodies. Furthermore, the sample according to Experimental Example 3 also showed results similar to those of Experimental Example 2. Note that in the tensile test, the bonded portion of the bonded product with the agar material prepared as a comparative example (Comparative Product B) peeled off, making it impossible to measure the bond strength.

[0046] Although the embodiments and experimental examples of the present invention have been described above, the embodiments and experimental examples described above do not limit the scope of the invention as claimed. It should be noted that not all of the combinations of features described in the embodiments and experimental examples are necessarily essential to the means for solving the problems of the invention.

[0047] The fishing bait according to this embodiment can also be referred to in the following appended claims, which should not be confused with the claims.

[0048] (Additional note 1) a first substrate containing a water-soluble polymer as a main component and having a first main surface and a second main surface opposite to the first main surface; a second substrate that is bonded to the second main surface of the first substrate and that contains a feed material as a main component and the water-soluble polymer; A fishing bait comprising: (Additional note 2) The fishing bait according to appended claim 1, wherein the water-soluble polymer that is the main component of the first substrate and the water-soluble polymer contained in the second substrate are made of the same material, thereby causing the first substrate and the second substrate to be inseparably bonded together. (Additional note 3) Item 2. The fishing bait according to Item 1, wherein the water-soluble polymer is polyvinyl alcohol. (Additional note 4) 4. The fishing bait according to claim 3, wherein the water-soluble polymer further comprises at least one or more of xanthan gum, locust bean gum, carrageenan, guar gum, sodium alginate, gellan gum, psyllium seed gum, agar, and the like. (Additional note 5) a first layer (needle-holding layer) containing polyvinyl alcohol as a main component and having a substantially triangular shape in a plan view; a second layer (feeding material layer, biting layer) containing polyvinyl alcohol and a feeding material as a main component, having a substantially triangular shape in a plan view, bonded to the main surface of the first layer, and having a surface opposite to the side bonded to the first layer exposed to the outside; A fishing bait comprising: [Explanation of symbols]

[0049] 1. Fishing bait 5 Circumscribed Circle 7 Virtual Circle 10 First base material 20 Second base material 30 Joint area 60, 62 Vertices 70, 72, 74, 76 intersection 100 First main surface 110 Second main surface 200 First main surface 210 Second main surface

Claims

1. A flat fishing bait, one surface of a first substrate containing polyvinyl alcohol is overlapped with one surface of a second substrate containing a bait material and polyvinyl alcohol, and the overlapping surfaces are bonded together without peeling when a tensile test is carried out using a rheometer under conditions of a tensile speed of 300 mm / min and an extension of the bait of 25 mm; a surface of the second substrate opposite to the surface bonded to the first substrate is exposed to the outside; The fishing bait, wherein the concentration of the polyvinyl alcohol in the first substrate is 3 wt % or more and less than 20 wt %, and the concentration of the polyvinyl alcohol in the second substrate is 0.5 wt % or more and less than 10 wt %.

2. The fishing bait according to claim 1, wherein the polyvinyl alcohol of the first substrate and the polyvinyl alcohol of the second substrate have a region where they are bonded to each other.

3. 2. The fishing bait according to claim 1, wherein the bait contains at least one bait material selected from the group consisting of aquatic organisms and animals and plants used as fishing bait.

4. a concentration of the polyvinyl alcohol in the first base material is 8 wt % or more; 2. The fishing bait of claim 1, wherein the second substrate contains more than 30 wt% of the bait material based on the total weight of the second substrate.

5. the first substrate has a gel strength of 13 (N) or more as measured by a rheometer; 2. The fishing bait according to claim 1, wherein the second base material has a gel strength of 4 (N) or more as measured by a rheometer.

6. The first base material has a triangular shape in a plan view, 2. The fishing bait according to claim 1, wherein a ratio t / D of a total thickness t of the thickness of the first substrate and the thickness of the second substrate to a diameter D of a circumscribing circle of the triangular first substrate in a plan view is less than 1.

7. the first base material is polygonal in plan view, 2. The fishing bait according to claim 1, wherein, of the line segments connecting two points selected from a plurality of vertices of the polygon located on an imaginary circle including at least two vertices of the polygon and an intersection point between the imaginary circle and the polygon, L is the distance between the two points at which the line segment has the longest length, and t / L is a ratio of the total thickness t of the thickness of the first base material and the thickness of the second base material to L, which is less than 1.

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