Braided composition and method for producing the same

Abstract

To provide a braided cord-like composition having design properties and a low-cost braided cord-like composition that does not give a sense of incongruity by suppressing visibility and is capable of attracting attention. The braided cord-like composition is colored with a plurality of color samples of the same color having irregular lengths.

Description

[Technical Field]

[0001] The present invention relates to a braided cord-like composition, mainly for fishing lines, that is suitable for use in outdoor activities other than fishing, and a method for producing the same. More specifically, the present invention relates to a braided cord-like composition with a design feature, and a low-cost braided cord-like composition that does not create a sense of incongruity by suppressing visibility and is capable of attracting attention, and a method for producing the same. [Background technology]

[0002] Monofilament, a single filament, is often used for fishing lines for leisure and commercial fishing. Monofilament has a smooth surface and low frictional resistance caused by rubbing against the guide, allowing for accurate casting of bait and other lures. Monofilament lines also have the advantage of excellent water-shedding properties because they do not retain water. Furthermore, they are easy to handle because they do not become fuzzy at cut ends. However, monofilament lines generally have high rigidity, and as they become thicker, they do not have the flexibility required for fishing lines. In particular, high-strength ultra-high molecular weight polyethylene fibers are difficult to manufacture and, due to their extremely high rigidity, are difficult to wind onto a reel.

[0003] On the other hand, so-called multifilament fishing lines, which are made by braiding or twisting multiple thin filaments, are also used. This multifilament fishing line has the advantage that flexible fishing lines of any thickness can be obtained by setting the number and thickness of the combined filaments.

[0004] In addition, fishing lines with various colors are sold so that anglers can choose the line that best suits their fishing situation. In particular, fishing lines with multiple colors are useful when you want to sink lures or bait hooks deep into the water, at a specified depth where you think there will be a lot of fish. Also, the different colored markings at regular intervals are useful for detecting when a fish has struck, as a guide for winding the fishing line onto the reel spool, and for various other purposes.

[0005] Incidentally, fish are not colorblind; some species are said to be able to distinguish between colors, while others are not. This is because the types and numbers of cone cells, which are responsible for color recognition, differ among fish species. In other words, the degree of development of cone cells, which are responsible for color recognition, and rod cells, which respond to differences in light intensity and distinguish brightness, differ among fish species, resulting in some fish being able to distinguish between colors and others being unable to do so. It is said that many fish living in coastal areas have increased numbers of cone cells and are therefore able to distinguish between colors. Meanwhile, fish living in the deep sea, where light is less abundant, are said to have increased numbers of rod cells and are more likely to develop the ability to grasp the contours of other fish based on light and darkness rather than the ability to distinguish between colors. In other words, depending on the environment in which they live and the abilities necessary for survival, fish living in environments where it is advantageous to be able to distinguish between colors have evolved to develop color vision (the ability to distinguish between colors), while fish living in environments where it is not necessary to be able to distinguish between colors have evolved to be more sensitive to light and dark than to color vision.

[0006] For example, it is said that sea bass, mullet, rockfish, greenling, sea bream, sea bream, goby, parrotfish, and flounder can distinguish between different colors, while filefish, yellowtail, and sharks cannot. It is said that different fish species have colors they prefer, colors that increase activity, colors that warn off fish, colors that attract fish, and colors that scare fish away. However, fishing environments, including fishing spots, are not always the same, and the optimal conditions for catching fish vary depending on the fishing season, the tides of the day, the turbidity of the water, and other factors. For example, fluorescent and phosphorescent fishing gear are often used for night fishing. However, depending not only on the color of the fishing line but also on the fishing spot and the conditions at the time, the same light intensity can sometimes attract fish and sometimes warn them off.

[0007] As such, it is true that catches are affected by various conditions, but as long as there are fish species that can distinguish between different colors, it can be said that coloring fishing line is preferable to increase catches.

[0008] Incidentally, Patent Document 1, an example of a prior document of this type, describes a fishing line made of a monofilament obtained by melt-spinning a polyvinylidene fluoride resin, which has strength properties of a tensile strength of 600 to 760 MPa and a knot strength of 475 to 550 MPa, and the surface roughness of the monofilament is in the range of 2.5 μm to 7.5 μm, and the total light transmittance measured with a turbidity meter is 90% or less, and the monofilament has colored and uncolored portions alternately arranged at regular intervals along its length. However, the fishing line described in Patent Document 1 has colored and non-colored sections alternately arranged at regular intervals along its length, which may alert fish that can distinguish between different colors.Furthermore, the alternating colored and non-colored sections arranged at regular intervals along its length may attract too much attention and create a sense of incongruity.

[0009] Furthermore, Patent Document 2 describes a fishing line, as shown in Figure 17, which comprises a core thread (101) that is colored with a predetermined coloring agent and colored in different colors at predetermined lengths, and outer layer threads (102) made of transparent or translucent filaments that are arranged around the core thread (101) in a manner that prevents contact between the core thread (101) and other objects, with gaps (103) formed between the outer layer threads (102). However, the color of the core line (101) of the fishing line described in Patent Document 2 varies for each predetermined length, which may warn off fish that can distinguish between different colors. Also, the color of the core line (101) varies for each predetermined length, which may attract too much attention and cause discomfort.

[0010] Furthermore, Patent Document 3 describes a tapered fishing line, as shown in Figure 18, which comprises a tapered portion (112), a thick wire portion (113) that continues from the larger diameter side of the tapered portion (112) and has the same diameter as the maximum diameter of the tapered portion (112), and a thin wire portion (111) that continues from the smaller diameter side of the tapered portion (112) and has the same diameter as the minimum diameter (114) of the tapered portion (112), in which a first colored portion (115) serving as an identification portion is provided in the thick wire portion (113) within a predetermined range starting from the boundary portion (116) between the tapered portion (112) and the thick wire portion (113), and a second colored portion (117) of a different color from the first colored portion (115) is provided in the tapered portion (112) within a predetermined range starting from the boundary portion (116). However, the first and second colored portions described in Patent Document 3 are merely for visually recognizing the boundary between the tapered portion (112) and the thick line portion (113).

[0011] Patent Document 4 describes a method for producing fishing line colored side by side in two or more camouflage colors in the longitudinal direction by supplying multiple lots of thermoplastic synthetic resin raw material having amino and / or carboxyl groups at its terminals, blending each of the lots with one or a combination of two or more end-capping agents selected from the group consisting of end-capping agents dyeable with basic dyes, end-capping agents easily dyeable with acid dyes, and end-capping agents resistant to acid dyes, and granulating each of the resulting resin blends by melt extrusion to prepare granular or powdered resin raw material whose end groups have been chemically modified with the end-capping agent; kneading a blend of two or more resin raw materials selected from the above resin raw materials and then melt-spinning the blend to produce a yarn; and then immersing the yarn in a dye bath containing, in one or more tanks, multiple dyes of different colors selected from acid dyes and basic dyes. Thus, in order to obtain the camouflage colored fishing line described in Patent Document 4, extremely complicated processes must be carried out, resulting in a significant increase in costs. [Prior art documents] [Patent documents]

[0012] [Patent Document 1] Japanese Patent Application Laid-Open No. 2012-100551 [Patent Document 2] International Publication No. 2007 / 083511 Pamphlet [Patent Document 3] Japanese Patent Application Laid-Open No. 2005-328713 [Patent Document 4] Japanese Patent Application Laid-Open No. 2002-345378 Summary of the Invention [Problem to be solved by the invention]

[0013] In view of the above problems, an object of the present invention is to provide a braided cord-like composition with a design feature, a low-cost braided cord-like composition that does not give an unpleasant feeling by suppressing visibility and yet is capable of attracting attention, and a method for producing the same. [Means for solving the problem]

[0014] To achieve the above object, the first invention of the present application is a braided cord-like composition characterized by being colored with a plurality of irregularly-lengthed samples of the same color.

[0015] The second invention of the present application is characterized in that, in the first invention of the present application, the coloring is a camouflage color.

[0016] The third invention of the present application is characterized in that, in the second invention of the present application, the hue difference, saturation difference, and brightness difference between adjacent camouflage colors, as determined by the visual comparison method for surface colors of JIS Z8723:2000, are within the evaluation grades of 0 to 3. The visual comparison method for surface colors, JIS Z8723:2000, is a Japanese Industrial Standard based on ISO / DIS 3668, "Paints and vanishes—Visual comparison of the color of paints," published in 1996. It is a Japanese Industrial Standard that translates the corresponding international standard, without modifying the technical content. It involves visually comparing a sample color with a reference standard color under daylight or under a standard light source in a color comparison booth. Color difference components consist of hue, saturation, and lightness, and the evaluation scale is divided into six levels, from 0 to 5, with 0 representing an imperceptible difference, 1 representing a very slight, barely perceptible difference, 2 representing a slight, but clearly perceptible difference, 3 representing a moderate, but clearly perceptible difference, 4 representing a very significant difference, and 5 representing an extreme difference.

[0017] The fourth invention of the present application is characterized in that in the third invention, the braided cord-like composition is a fishing line.

[0018] The fifth invention of the present application is a method for producing the braided cord-like composition of the first, second or third invention of the present application by letterpress printing, characterized in that the transfer roller has convex portions having micropores.

[0019] The sixth invention of the present application is a method for producing the fishing line of the fourth invention of the present application by letterpress printing, characterized in that the transfer roller has convex portions with micropores. [Effects of the Invention]

[0020] According to the first invention of the present application, a braided cord-like composition with a design feature can be provided. According to the second invention of the present application, a low-cost braided cord-like composition that does not create a sense of incongruity by suppressing visibility and yet attracts attention can be provided. According to the third invention of the present application, camouflage colors can be skillfully displayed. According to the fourth invention of the present application, the use of camouflage-colored fishing line can significantly reduce fish wariness, allowing anglers to achieve excellent catches by appropriately selecting the fish species and fishing grounds they are targeting. According to the fifth invention of the present application, an optimal method for producing a braided cord-like composition can be provided. According to the sixth invention of the present application, an optimal method for producing a fishing line can be provided.

[0021] Fishing lines are an easily available item and are increasingly being used in outdoor activities such as camping and airsoft games, and there is a growing demand for lines with various functions suited to scenes other than fishing, particularly those with elaborate designs and those with reduced visibility so as not to cause discomfort. In this regard, the braided cord-like compositions of the first and second inventions of the present application can meet such demands. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is a perspective view showing a state in which a fishing line according to an embodiment of the present invention is attached to a reel and is being unwound from the reel. [Figure 2] FIG. 2 is an enlarged plan view showing a portion in the longitudinal direction of a braided cord-like composition according to one embodiment of the present invention. [Figure 3] FIG. 3 is an enlarged plan view showing a portion in the longitudinal direction of a braided cord-like composition according to another embodiment of the present invention. [Figure 4] FIG. 4 is an enlarged plan view showing a portion in the longitudinal direction of a braided cord-like composition according to yet another embodiment of the present invention. [Figure 5] FIG. 5 is an enlarged plan view showing a portion in the longitudinal direction of a braided cord-like composition according to yet another embodiment of the present invention. [Figure 6] 6(a) to 6(d) are diagrams for explaining marginal zones in letterpress printing. [Figure 7] FIG. 7(a) is a diagram showing a rotary type printing method used in letterpress printing, and FIG. 7(b) is a diagram showing a platen type printing method used in letterpress printing. [Figure 8] FIG. 8 is a diagram showing the schematic mechanism of a semi-rotary relief printing press. [Figure 9] FIG. 9(a) is a diagram showing the schematic mechanism of a satellite type rotary printing press, and FIG. 9(b) is a diagram showing the schematic mechanism of a stack type rotary printing press. [Figure 10] FIG. 10 is a diagram showing the general mechanism of an intermittent rotary printing press. [Figure 11] FIG. 11 is a diagram showing the schematic mechanism of a flexographic printing press. [Figure 12] 12(a) and 12(b) are cross-sectional views showing an example of a printing relief plate. [Figure 13] 13(a) and 13(b) are plan views showing examples of halftone dots. [Figure 14] FIG. 14 is a diagram illustrating a method for performing relief printing using a relief printing apparatus according to an embodiment of the present invention. [Figure 15] Figure 15 shows an example of numerous tiny holes formed in the convex portions of a convex pattern area of ​​a printing relief plate, and Figure 15(b) shows an enlarged view of the case where the numerous tiny holes formed in the convex portions of the convex pattern area indicated by the arrows in Figure 15(a) are circular in shape and have the same diameter. [Figure 16] Figure 16 shows another example of numerous tiny holes formed in the convex portions of the convex pattern area of ​​a printing relief plate. Figure 16(b) shows an enlarged view of the case where the shapes of the numerous tiny holes formed in the convex portions of the convex pattern area indicated by the arrows in Figure 16(a) consist of multiple shapes, and the maximum diameters of the multiple shapes of holes vary. [Figure 17] FIG. 17 is an enlarged schematic diagram of the main part of the fishing line described in Patent Document 2. [Figure 18] FIG. 18 is a schematic diagram of the fishing line described in Patent Document 3. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments of the present invention will be described in detail.

[0024] Fig. 1 is a perspective view showing a state in which fishing line 2 of one embodiment of the present invention is attached to reel 1 and is being unwound from reel 1. The braided composition of the present invention is colored with a plurality of irregularly-lengthed samples of the same color, and the coloring may be camouflage colors. Fig. 2 is an enlarged plan view showing a portion in the longitudinal direction of a braided composition of one embodiment of the present invention, Fig. 3 is an enlarged plan view showing a portion in the longitudinal direction of a braided composition of another embodiment of the present invention, Fig. 4 is an enlarged plan view showing a portion in the longitudinal direction of a braided composition of yet another embodiment of the present invention, and Fig. 5 is an enlarged plan view showing a portion in the longitudinal direction of a braided composition of yet another embodiment of the present invention.

[0025] If the darkest colored portion is designated as A, the portion lighter in color than A is designated as B, the portion lighter in color than B is designated as C, and the uncolored portion is designated as D, in FIG. 2, on both sides of A, there is a change from A to B, then from B to C, and then from C to D. In FIG. 3, there is a change from A to the right, then B and C, and then C and D, and then ... C, and then C, and then D, and then D, and then D, and then D, and then D, and then C, and then C, and then C, and then D, are shown. These are merely examples of embodiments of the present invention, and countless color combinations are possible. In order to provide a braided cord-like composition that does not cause discomfort by suppressing visibility and yet is capable of attracting attention, it is preferable that the hue difference, saturation difference, and brightness difference between adjacent colors, that is, in the case of Figure 2, between A and B, B and C, or C and D, according to the visual comparison method for surface colors of JIS Z8723:2000, be within an evaluation grade of 0 to 3. Of course, the lengths of A, B, C, and D are arbitrary, and the user of the braided cord-like composition of the present invention can select each length as needed.

[0026] The braided cord-like composition of the present invention preferably uses a multifilament yarn in which the individual filaments are bonded to one another and integrated as the braiding constituent yarn, and is braided by combining a plurality of the above-mentioned braiding constituent yarns in such a way that their relative positions and / or their relative positions can be displaced.

[0027] Here, the above-mentioned "bonding" includes bonding via a substance other than the filaments, such as an adhesive, as well as so-called self-fusion bonding, in which the filaments themselves melt and bond to each other. Furthermore, the above-mentioned "being able to change the relative position and / or relative posture" means that the relative positions and postures of the braiding yarns to each other can be changed, and includes not only cases where the braiding yarns are not bonded to each other, but also cases where the braiding yarns are bonded to such an extent that they can be easily separated by simple kneading, for example, when they are partially bonded to each other or when they are bonded with weak adhesive strength.

[0028] In the multifilament yarn that is the yarn for making the above-mentioned braid, the filaments are bonded together and integrated, so the filaments do not easily come apart at the cut point. Also, because the filaments are bonded together, the integrated filament yarn will not easily break even if it rubs against another object such as a rock corner. On the other hand, the above-mentioned braiding yarns are combined and woven so that their relative positions and relative postures can be changed, so the rigidity of the braiding yarn is prevented from becoming excessively high, and the braiding yarn has excellent flexibility that allows it to be easily handled, for example, as a fishing line.

[0029] The multifilament yarn constituting the braiding component yarn is not limited to a specific aggregate structure, and the number of aggregated filaments and the thickness of each filament are not limited to specific values, as long as the multifilament yarn is formed by bonding multiple filaments together. For example, the filaments may be parallel to each other, twisted, or braided.

[0030] The filaments may be bonded to one another by any means. For example, the filaments in the multifilament yarn may be self-fused by heating. In this case, there is no need to add an adhesive or adhesive resin, which is preferable because the tensile strength and other properties of the braiding yarn relative to its thickness and weight can be maintained at a high level. The filaments in the multifilament yarn may also be bonded to one another via a thermal adhesive resin or adhesive. In this case, the filaments are firmly bonded to one another via the thermal adhesive resin or adhesive, which is preferable because the multifilament yarn is reliably integrated.

[0031] The filaments are not limited to any particular material, and their physical properties, such as tensile strength, are not limited to any particular values. However, when used as fishing line, it is preferable for them to have excellent tensile strength, and specifically, it is preferable for the filaments to have a tensile strength of 20 g / dtex or more. Specific examples of filaments with such excellent tensile strength include filaments containing so-called ultra-high molecular weight polyethylene, which has a molecular weight of about 200,000 or more, more preferably about 600,000 or more.

[0032] The filaments constituting the multifilament yarn are not limited to any particular material, and examples include filaments made of thermoplastic resins such as polyamide resins, polyester resins, fluorine-containing resins, and polyolefin resins. Among these filaments, it is preferable to use high-strength filaments having a tensile strength of about 20 g / dtex or more, preferably about 25 to 50 g / dtex, and more preferably about 30 to 40 g / dtex. Specific examples of such high-strength filaments include ultra-high molecular weight polyethylene filaments, wholly aromatic polyamide filaments, heterocyclic high-performance filaments, and wholly aromatic polyester filaments. Among these, so-called ultra-high molecular weight polyethylene filaments, having a molecular weight of about 200,000 or more, preferably about 600,000 or more, are preferably used.

[0033] The filaments may contain various known additives, such as pigments, dyes, stabilizers, plasticizers, and lubricants, within the scope of the present invention, and may also contain metal particles or the like to adjust the specific gravity and sedimentation rate.

[0034] The multifilament yarn is composed of a plurality of the filaments. The plurality of filaments may be simply aligned, twisted, or braided. The multifilament yarn may be composed of filaments of the same material, or may be a combination of filaments of different materials. For example, it may be combined with metal fibers.

[0035] The above filaments and multifilament yarns are not limited to those with a specific thickness. For example, by assembling about 5 to 1600 filaments of about 0.3 to 10 dtex, a multifilament yarn of about 5 to 1600 dtex can be used.

[0036] The braided cord composition of the present invention can be produced by combining at least three or more, e.g., four, eight, twelve, or sixteen, braiding yarns, each of which is an integrated multifilament yarn, as the braiding yarn. The braiding yarns are arranged in a manner that allows for relative position and orientation changes. While the braiding method is not particularly limited, it is typically performed using a braiding machine (braiding machine). In this case, the braid may be formed using only the individual braiding yarns, or a core yarn may be placed in the center and surrounded by the aforementioned braiding yarns. The core yarn may be any thread, including monofilament yarns, multifilament yarns, and the integrated multifilament yarns described above. In addition, inorganic fibers such as glass fibers and metal fibers may be used, either alone or in combination.

[0037] When the above-mentioned braiding yarn is used as a fishing line, for example, a specific position in the length direction may be repeatedly rubbed against a rock corner or the like in a direction perpendicular to the length direction. On the other hand, the above-mentioned braiding yarn is usually easily cut when rubbed against another object in a direction perpendicular to the length direction. For this reason, the more inclined the above-mentioned braiding yarn is with respect to the length direction of the braiding yarn, the less likely the braiding yarn is to be cut when rubbed against another object, and the abrasion resistance of the braiding yarn can be improved, which is preferable. Therefore, the pitch number for braiding the above-mentioned braiding yarn varies depending on the thickness of the braiding yarn and is not limited to a specific value, but is preferably about 5 to 50 pitches / inch, and more preferably 20 to 40 pitches / inch.

[0038] The braided composition or fishing line of the present invention can be produced by letterpress printing.

[0039] [Toppan Printing] Relief printing is a method in which ink is applied to the protruding parts of a plate (convex parts) and then transferred to the printed material. Relief printing requires the creation of a plate. The parts of the plate that have the printed design are protruding, and the non-printing parts are recessed. Ink is applied to the protruding parts, and the ink is transferred by pressing the protruding parts against the printed material. Because ink is placed on the ridges of the plate and transferred to the printed material by applying pressure, it is possible to print designs with strong, sharp outlines.

[0040] As shown in Figure 6(a), in order to transfer the ink 13 adhering to the raised portion 12 of the plate 11 to the printing material 14, as shown in Figure 6(b), when the ink 13 adhering to the raised portion 12 is pressed against the printing material 14, as shown in Figure 6(c), the ink in portion 13a is pushed outward, the ink in portion 13b becomes slightly darker, and the ink in the inner portion becomes slightly insufficient.As a result, as shown in Figure 6(d), a dark ink outline 13c called the marginal zone is created, and the ink in the inner portion 13d of the dark outline 13c is slightly insufficient, so this marginal zone 13c gives a sharp impression via the transition region 13e between 13c and 13d.

[0041] On the other hand, intaglio printing is the exact opposite of letterpress printing: the area to be printed is carved out, ink is collected in the recessed area (depressed area), and the ink is transferred by pressing the collected ink onto the material to be printed. Intaglio printing, the depth of the grooves in the recessed area is used to express shades of light and dark, which has the disadvantage that the pattern is prone to bleeding.

[0042] In principle, letterpress printing can be divided into the rotary type shown in Figure 7(a) and the platen type shown in Figure 7(b). As shown in Figure 7(a), the rotary type is a method in which ink 24 adhering to the outer surface of a rotating ink roller 23 is transferred to the raised portion 22 on the entire circumference of a rotating plate cylinder 21, and the ink 24 is then transferred to a printing material 26 sandwiched between the rotating plate cylinder 21 and a rotating impression cylinder 25.

[0043] As shown in Figure 7(b), the flat pressure type involves applying ink 29 to the raised portion 28 of a printing plate 27, and then transferring the ink 29 to the printing material 31 by a pressure plate 30 moving up and down, which applies strong pressure to the printing material 31 sandwiched between the printing plate 27 and the pressure plate 30.

[0044] Relief printing presses include flatbed relief printing presses, semi-rotary relief printing presses, rotary printing presses, intermittent rotary printing presses, and flexographic printing presses.

[0045] [Flat-press relief printing machine] The printing method of a flat pressure letterpress printing press is the flat pressure type shown in Figure 7(b), and in the actual machine, ultraviolet lamps for drying or hardening the ink transferred to the printing material are installed at appropriate locations in the direction of travel of the printing material. The features of this method are as follows: The machine is designed to be compact, allowing for space-saving installation. Plate replacement is easy to perform. The printing speed is slower than that of a rotary printing press, making it suitable for small- to medium-lot production of a wide variety of products. The ability to apply high printing pressure gives the design strength and produces a clear printing effect.

[0046] [Relief press semi-rotary printing press] The printing method of a semi-rotary relief printing press is the rotary type shown in Figure 7(a). As shown in Figure 8, the printing plate is a cylindrical cylinder 41, which moves back and forth in a direction perpendicular to the direction of movement of the printing material 42 to be printed. This method is also called the circular pressure method. Aside from changing the printing plate from a flat plate to a cylinder, other features are almost identical to those of a flat-press relief printing press. In Figure 8, 43 is the platen and 44 is the ultraviolet lamp. The advantages of this method are as follows: The machine is designed compactly, allowing for space-saving installation; Plate replacement is easy; The printing speed is slower than that of a rotary printing press, making it suitable for small- to medium-lot production of a wide variety of products; The printing surface is subjected to linear pressure (width 10 mm or less), which allows for good plate release, making it better suited to solid printing than flat-press relief printing.

[0047] [Rotary printing press] The printing method of a rotary press is the rotary type shown in Figure 7(a). This type of press was developed to handle large-volume printing, and the plate and impression cylinders rotate in accordance with the flow of printing material. The mechanism shown in Figure 9(a) is called a satellite type, while the mechanism shown in Figure 9(b) is called a stack type. The satellite type shown in Figure 9(a) has multiple pairs of plate cylinders 52a and ink rollers 53a, plate cylinders 52b and ink rollers 53b, plate cylinders 52c and ink rollers 53c, and plate cylinders 52d and ink rollers 53d arranged around an impression cylinder 51. Ink adhering to each ink roller is transferred to a printing material 54, which is sandwiched between the rotating plate cylinders and the rotating impression cylinder 51 and moves in the direction indicated by the arrow along the outer periphery of the impression cylinder 51. Reference numerals 55a, 55b, 55c, and 55d are ultraviolet lamps. The stack type shown in Figure 9(b) differs from the satellite type in that it has multiple impression cylinders. Instead, multiple pairs of impression cylinders 56a, plate cylinder 57a, and ink roller 58a are arranged along the direction of the printing material movement: impression cylinder 56b, plate cylinder 57b, and ink roller 58b; impression cylinder 56c, plate cylinder 57c, and ink roller 58c; and impression cylinder 56d, plate cylinder 57d, and ink roller 58d. The ink on each ink roller is transferred to the printing material 59, which is sandwiched between the rotating plate cylinders and the rotating impression cylinders and moves in the direction indicated by the arrow. Reference numerals 60a, 60b, 60c, and 60d are ultraviolet lamps. Rotary printing presses are widely used for color printing, including photographic printing, due to their high printing speed and high accuracy. This type has the following features: Fast printing speed, making it suitable for large-lot production; Excellent print reproducibility for photographic materials; The ability to install four or more color printing units allows for multicolor printing.

[0048] [Intermittent rotary printing press] The printing method of the intermittent rotary press is the rotary type shown in Figure 7(a), and this press overcomes the drawback of rotary presses, namely the need to adjust the printing pitch (cylinder diameter and gear replacement), by feeding the printing material in reverse. As shown in Figure 10, multiple sets of impression cylinder 61a, plate cylinder 62a, and ink roller 63a, and impression cylinder 61b, plate cylinder 62b, and ink roller 63b are arranged along the direction of movement of the printing material 66, and further, nip roller 64a and vacuum roller 65a, and nip roller 64b and vacuum roller 65b are arranged on both sides of these impression cylinder, plate cylinder, and ink roller. 67a and 67b are ultraviolet lamps. Then, with nip rollers 64a and 64b open, the ink adhering to each ink roller is transferred to the printing material 66, which is sandwiched between the rotating plate cylinders and the rotating impression cylinders and moving to the right, and then the printing material 66 is sandwiched between the combination of nip roller 64a and vacuum roller 65a on the left side and the combination of nip roller 64b and vacuum roller 65b on the right side, stopping the feed of the printing material 66. Next, with nip rollers 64a and 64b open again, the ink adhering to each ink roller is transferred to the printing material 66, which is sandwiched between the rotating plate cylinders and the rotating impression cylinders and moving to the left, and then the printing material 66 is sandwiched between the combination of nip roller 64a and vacuum roller 65a on the left side and the combination of nip roller 64b and vacuum roller 65b on the right side, stopping the feed of the printing material 66. This operation is repeated. The features of this method are as follows: Excellent suitability for solid printing and print reproducibility. Short printing setup time and little printing material waste. Although the printing speed is slower than that of a rotary printing press, it is easy to work with and can handle small lots and a wide variety of products. The printing pitch is adjusted by reversing the printing material, so there is no need to replace cylinders or gears (low initial investment). Because the printing material is reversed and printing always starts from a fixed position, ghosting is less likely to occur.

[0049] [Flexographic printing machine] The printing method of a flexographic press is the rotary type shown in Figure 7(a). As shown in Figure 11, ink 72 from an ink pan 71 is transferred to the cells (countless tiny depressions engraved on the surface) of an anilox roll 73. Any excess ink adhering to the surface of the anilox roll 73 is scraped off by a thin blade called a doctor blade 74, and only the ink remaining in the cells is transferred to a raised portion (printing plate) 76 on a rubber or synthetic resin printing cylinder 75. The ink transferred to the printing plate 76 is then transferred (printed) onto the printing material 78 sandwiched between the printing cylinder 77. This method has the following features: It allows for high-speed printing and is easy to work with. It can achieve high solid print density. Various conditions can be easily quantified, making it suitable for standardization. It is less likely to produce ghosting on the printing material.

[0050] [Printing relief] Braided cord-like compositions having patterns such as those shown in FIGS. 2 to 5 can be obtained by relief printing using printing relief plates such as those shown in FIGS. 12(a) and 12(b). The printing relief plate of FIG. 12(a) has a convex pattern region 82a consisting of a plurality of convex portions formed on a substrate 81, while the printing relief plate of FIG. 12(b) has a convex pattern region 82b consisting of a plurality of convex portions formed on the substrate 81. In FIG. 12(a), the convex pattern region 82a is formed by a plurality of convex portions formed continuously on the substrate 81. In FIG. 12(b), the convex pattern region 82b is formed by a plurality of convex portions that are separated and independently formed on the substrate 81. Either the printing relief plate of FIG. 12(a) or FIG. 12(b) may be used in the present invention. If necessary, a layer for imparting water resistance, oil resistance, water repellency, adhesiveness, or the like may be added between the convex pattern region 82a or 82b and the substrate 81.

[0051] The substrate 81 only needs to have the mechanical strength to withstand printing, and can be made of known synthetic resins such as polyethylene, polystyrene, polybutadiene, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyamide, polyethersulfone, polyethylene terephthalate, polyethylene naphthalate, polyethersulfone, polyvinyl alcohol, known metals such as iron, copper, and aluminum, or laminates thereof.

[0052] A material that maintains high dimensional stability is desirable for the substrate 81. Therefore, a metal is preferably used as the material used for the substrate 81. Examples of metals that can be used for the substrate 81 include iron, aluminum, copper, zinc, nickel, titanium, chromium, gold, silver, and alloys and laminates thereof, but in particular, steel substrates and aluminum substrates that contain iron as a main component are preferably used in terms of workability and economy.

[0053] The polymer that is one component of the resin that forms the convex portions of convex pattern region 82a or 82b can be selected from one or more types of rubber such as nitrile rubber, silicone rubber, isoprene rubber, styrene butadiene rubber, butadiene rubber, chloroprene rubber, butyl rubber, acrylonitrile rubber, ethylene propylene rubber, and urethane rubber, as well as synthetic resins such as polyethylene, polystyrene, polybutadiene, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyamide, polyurethane, polyethersulfone, polyethylene terephthalate, polyethylene naphthalate, polyethersulfone, and polyvinyl alcohol, copolymers thereof, and natural polymers such as cellulose. However, when applying a coating liquid such as an organic light-emitting material, fluorine-based resins such as fluorine-based elastomers, polytetrafluoroethylene, polyvinylidene fluoride, polyvinylidene hexafluoride, and copolymers thereof are desirable from the standpoint of solvent resistance to organic solvents.

[0054] [Dot] The shades of color in letterpress printing are expressed by a collection of small dots called "halftone dots." Darker areas can be expressed by packing the dots closely together, and lighter areas can be expressed by spreading the dots apart. In other words, the shade of color can be adjusted by changing the size and density of the dots. For example, Figure 13(a) shows a halftone dot density (the ratio of ink to the area of ​​space) of 20%, while Figure 13(b) shows a halftone dot density (the ratio of ink to the area of ​​space) of 80%. The unit used to express halftone dot density is screen ruling (lines per inch: lpi).

[0055] [Relief printing method] The braided cord composition or fishing line of the present invention can be produced using any of the letterpress printing machines described in paragraphs 0045 to 0049, including flat-press letterpress printing machines, semi-rotary letterpress printing machines, rotary printing machines, intermittent rotary printing machines, and flexographic printing machines. For example, a letterpress printing apparatus having a schematic configuration as shown in FIG. 14 can be used. The letterpress printing apparatus shown in FIG. 14 has an ink tank (not shown), an anilox roll 91, and a plate cylinder 93 to which a resin letterpress 92 is attached. The raised pattern area (see 82a or 82b in FIG. 12) on the resin letterpress 92 can be formed by photolithography, laser ablation, or cutting. The ink tank contains a predetermined ink diluted with a solvent. The anilox roll 91 is configured to rotate in contact with the ink contained in the ink tank and the plate cylinder 93.

[0056] As the anilox roll 91 rotates, ink supplied from an ink tank is held uniformly on the surface of the anilox roll 91, and then transferred with a uniform film thickness to the convex portions of the convex pattern area (see 82a or 82b in FIG. 12) of a resin relief plate 92 attached to a plate cylinder 93. Furthermore, the printing material 94 (braided composition) on the stage 95 is moved to an appropriate printing start position, and while the convex pattern area (see 82a or 82b in FIG. 12) of the resin relief plate 92 comes into contact with the printing material 94 in accordance with the rotation of the plate cylinder 93, a pattern is formed at a predetermined position on the printing material 94 on the stage 95, and the predetermined ink is transferred to the printing material 94.

[0057] In order to provide a braided cord-like composition having a pattern as shown in Figures 2 to 5, the following conditions must be met. A predetermined image is formed by transferring printing ink, which has unique rheological properties, from the protruding portions of the protruding pattern region of the plate cylinder 93 to the material to be printed. In order to instantly attach and transfer the printing ink, which is a viscoelastic material, to the material to be printed under strong pressure, allowing the ink to penetrate into the material to form the pattern as shown in Figures 2 to 5, the surface pressure when the protruding portions of the protruding pattern region of the plate cylinder are brought into contact with the material to be printed, the application time of this surface pressure, the viscosity of the printing ink, and the shape and size of the minute pores formed in the protruding portions of the protruding pattern region are particularly important.

[0058] That is, the surface pressure when the convex portions of the convex pattern area of ​​the plate cylinder are brought into contact with the printing material is preferably 0.1 MPa to 600 MPa, more preferably 10 MPa to 300 MPa, and even more preferably 20 MPa to 200 MPa. The time for applying the surface pressure is preferably 0.01 to 60 seconds, more preferably 0.05 to 10 seconds, and even more preferably 0.1 to 3 seconds. The viscosity of the printing ink is preferably 0.01 to 1000 mPa·s, more preferably 0.5 to 500 mPa·s, and even more preferably 1 to 400 mPa·s. Numerous minute holes are formed in the convex portions of the convex pattern region. The hole shape may be one selected from various shapes such as circle, ellipse, rectangle, rhombus, trapezoid, square, isosceles trapezoid, right-angled trapezoid, and parallelogram. The hole size may be the same, or it is preferable to have a plurality of shapes, such as two, three, or four different shapes, with various hole sizes. The hole size is preferably 0.1 to 500 μm, more preferably 1 to 300 μm, and even more preferably 10 to 200 μm. The hole size here refers to the maximum diameter of the various shapes exemplified above (e.g., diameter for a circle, length of the major axis for an ellipse, length of the long side for a rectangle, length of the longer diagonal for a rhombus, length of the longer diagonal for a trapezoid, length of one side for a square, length of the diagonal for an isosceles trapezoid, length of the longer diagonal for a right-angled trapezoid, and length of the longer diagonal for a parallelogram). The hole depth may be approximately the same as the maximum hole diameter. Furthermore, in order to avoid creating an unnatural feeling, it is preferable that the number of minute holes formed in one convex portion in the convex pattern region is not too large; for example, it can be about 10 to 100 per square centimeter.

[0059] For example, if the shapes of the numerous tiny holes formed in the convex portions of the convex pattern region indicated by the arrows in Figure 15(a) are circular and the diameters of the circles are the same, it will be as shown in Figure 15(b), and if the shapes of the numerous tiny holes formed in the convex portions of the convex pattern region indicated by the arrows in Figure 16(a) are made up of a plurality of shapes and the maximum diameters of the holes of the plurality of shapes vary, it will be as shown in Figure 16(b). [Example]

[0060] Examples of the present invention will be described below, but they are not intended to limit the present invention in any way, and various changes and modifications can be made without departing from the technical scope of the present invention.

[0061] The multifilament yarn used was an ultra-high molecular weight polyethylene filament (specific gravity 0.98) Izanas (registered trademark, manufactured by Toyobo MC Co., Ltd.) 165 dtex / 140F (each filament corresponds to approximately 1.18 dtex) twisted to a twist coefficient of approximately 1.5. This multifilament yarn was fed into a heating furnace (not shown) at 140°C at a feed rate of 100 m / min and taken up at a take-up rate of 120 m / min, thereby stretching the multifilament yarn by approximately 1.2 times. The passage time through the furnace was set to 6 seconds or more, resulting in a multifilament yarn of approximately 138 dtex in which the individual filaments were firmly self-fused and integrated. Next, the above-mentioned integrated multifilament yarn was used as a braiding constituent yarn, and eight of these were used to braid at a pitch / inch using a braiding machine. The resulting braiding yarn had a density of 1160 dtex.

[0062] The braiding yarn having a diameter of 0.344 mm obtained as described above was printed using a relief printing apparatus as shown in Figure 14, and a printing relief plate having a raised pattern region as shown in Figure 12(a) (the minute holes formed in the raised region were circular with a diameter of 100 μm) was used. Three types of printing ink with viscosities of 1.5 mPa·s, 20 mPa·s, and 80 mPa·s were used to print the raised pattern region without printing ink, the raised pattern region with printing ink of viscosity 1.5 mPa·s, and the raised pattern region with printing ink of viscosity 20 mPa·s. The convex portions of the convex pattern region coated with printing ink, the convex portions of the convex pattern region coated with printing ink having a viscosity of 80 mPa s, the convex portions of the convex pattern region coated with printing ink having a viscosity of 20 mPa s, the convex portions of the convex pattern region coated with printing ink having a viscosity of 1.5 mPa s, and the convex portions of the convex pattern region not coated with printing ink were arranged adjacent to each other, and letterpress printing was performed at a surface pressure of 150 MPa for a surface pressure application time of 2 seconds, to obtain a braided cord-like composition having the pattern shown in Figure 2. That is, to obtain a braided cord-like composition having a pattern as shown in Figure 2, 3, 4, or 5, it is preferable to make the viscosity of the printing ink applied to adjacent convex portions in the convex pattern region different, or to have a convex portion to which printing ink is not applied adjacent to a convex portion to which printing ink is applied. The convex portions to which printing ink is applied may not only be adjacent to each other, but may also partially overlap each other. [Explanation of symbols]

[0063] 1 reel 2. Fishing line 11th edition 12 Convex part 13 Ink 14 Printing material 21 Printing cylinder 22 Convex part 23 Ink roller 24 ink 25 impression cylinder 26 Printing material 27 Print Edition 28 Convex part 29 Ink 30 Platen 31 Printing material 41 cylinders 42 Printing material 43 Platen 44 UV lamp 51 impression cylinder 52a, 52b, 52c, 52d plate cylinder 53a, 53b, 53c, 53d Ink 54a, 54b, 54c, 54d Printing material 55a, 55b, 55c, 55d Ultraviolet lamps 56a, 56b, 56c, 56d impression cylinder 57a, 57b, 57c, 57d plate cylinder 58a, 58b, 58c, 58d Ink rollers 59 Printing material 60a, 60b, 60c, 60d UV lamps 61a, 61b impression cylinders 62a, 62b plate cylinder 63a, 63b Ink rollers 64a, 64b Nip rollers 65a, 65b Vacuum rollers 66 Printing material 67a, 67b Ultraviolet lamp 71 Ink Pan 72 Ink 73 Anilox Roll 74 Doctor Blade 75 Printing cylinder 76 Convex part 77 impression cylinder 78 Printing material 81 Base material 82a, 82b Convex pattern area 91 Anilox Roll 92 Resin letterpress 93 Printing cylinder

Claims

1. A method for producing camouflage-colored fishing line of irregular lengths by letterpress printing, characterized in that a transfer roller has raised portions with numerous microscopic holes, each of which is formed so as to have a predetermined distance between it and other microscopic holes, and the viscosity of the printing ink applied to the raised portions is made different.

2. 2. The method according to claim 1, wherein the hue difference, saturation difference, and brightness difference between adjacent camouflage colors as determined by the visual comparison method for surface colors of JIS Z8723:2000 are in the range of evaluation grades 0 to 3.

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