Flat long object, method for manufacturing the same, and apparatus for manufacturing the same

Abstract

To provide a flat long body in which a plurality of long bodies (cables, tubes or the like) are arranged in parallel, and to provide a method and an apparatus for manufacturing the same.SOLUTION: A step S1 of preparing a plurality of long bodies, a step S2 of arranging the long bodies in parallel in a state of being in contact with each other, a step S3 of preparing a first sheet and a second sheet for laminating the long bodies, a step S2 of arranging the first sheet and the second sheet in a state of sandwiching the plurality of long bodies arranged in parallel in the long body arranging step (S4), a step S5 of preparing a press machine, A step S6 of pressing with a press machine in a heated state, The first sheet and the second sheet are bonded to each other in a state in which the plurality of cables disposed in parallel are interposed between the first sheet and the second sheet, and the first sheet and the second sheet are bonded to the cables by heat melting of the adhesive layers of the cables.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a flat elongated body in which a plurality of elongated bodies (for example, cables, tubes, etc.) are arranged in parallel, a manufacturing method thereof, and a manufacturing apparatus thereof. [Background technology]

[0002] For example, in the operating parts of electronic devices, flat cables formed by arranging elongated members in parallel and fixing their ends are widely used. For example, there is the following prior art.

[0003] This flat cable consists of multiple cables with circular cross sections arranged in parallel with gaps between them, which are sandwiched between two sheets and laminated together. However, this type of flat cable increases the overall width of the flat cable due to the gaps between the multiple cables, which has hindered the space-saving efforts of recent years. Summary of the Invention [Problem to be solved by the invention]

[0004] In view of the above circumstances, the invention described in the claims of this application has an object to provide a flat elongated body that achieves further space saving. [Means for solving the problem]

[0005] In order to achieve the above object, the method for manufacturing a flat elongated body of the present invention includes a elongated body preparation step of preparing a plurality of elongated bodies each coated with a first adhesive layer and having a radius satisfying the relationship d1≦dn, and a elongated body arrangement step of arranging the plurality of elongated bodies in parallel without any gaps between them. The method includes a lamination preparation step of preparing a first laminate layer and a second laminate layer for laminating the plurality of elongated bodies; a laminate layer arrangement step of arranging the first laminate layer and the second laminate layer so as to sandwich the plurality of elongated bodies arranged in parallel; a press preparation step of preparing a press in which a number of compression grooves corresponding to the number of the plurality of elongated bodies are formed; and a heating and compression step of compressing the plurality of elongated bodies, the first laminate layer, and the second laminate layer arranged in the laminate layer arrangement step with the heated press, wherein the depth direction lengths (L1 to Ln) of the compression grooves of the press are smaller than the radii (d1 to dn) of the corresponding elongated bodies.

[0006] The method for producing a flat elongated body of the present invention is characterized in that the press is a compression roll.

[0007] Furthermore, the method for producing a flat elongated body of the present invention is characterized in that the first and / or second laminate layer further has a second adhesive layer on the side of the elongated bodies.

[0008] The method for producing a flat elongated body of the present invention is characterized in that in the rolling step, the plurality of elongated bodies are compressed so as to be flattened in the width direction.

[0009] Furthermore, the method for manufacturing a flat elongated body of the present invention is characterized in that the depth-wise length (L1 to Ln) of the compression groove of the press is at least 1% or more smaller than the corresponding radius (d1 to dn) of the elongated body.

[0010] In addition, the flat elongated body of the present invention includes a plurality of elongated bodies that are arranged in parallel without gaps and each covered with a first adhesive layer that is independent of each other, and a laminate layer that collectively covers the plurality of elongated bodies. The thickness T1 of the first adhesive layer on the line connecting the centers of the cross-sections of two adjacent elongated bodies and the thickness T2 of the first adhesive layer in a first direction perpendicular to the center of the cross-section of the elongated body satisfy T1 < T2.

[0011] Furthermore, the method for manufacturing the flat elongated body of the present invention includes a plurality of elongated bodies that are arranged in parallel without gaps and each covered with a first adhesive layer that is independent of each other, and a laminate layer made of a porous material that collectively covers the plurality of elongated bodies. The porosity P1 of the first region of the laminate layer in a first direction perpendicular to the center of the cross-section of the elongated body and the porosity P2 of the second region along a second direction horizontal to the center of the elongated body satisfy P1 < P2.

[0012] In addition, the flat elongated body of the present invention includes a plurality of elongated bodies that are arranged in parallel without gaps and each covered with a first adhesive layer that is independent of each other, and a laminate layer that collectively covers the plurality of elongated bodies. At least one first elongated body among the plurality of elongated bodies has an elliptical cross-section due to compression. The first elongated body has a flatness ratio f (when the long axis is S1 and the short axis is S2, f = (S1 - S2 / S1)) of 0.01 or more.

Brief Description of the Drawings

[0013] [Figure 1] It is a diagram showing an outline of the manufacturing process of the flat elongated body. [Figure 2] It is a diagram showing the elongated body preparation process. [Figure 3] It is a diagram showing the elongated body arrangement process. [Figure 4] It is a diagram for explaining the laminate layer arrangement process. [Figure 5] It is a diagram for explaining the press preparation process. [Figure 6] FIG. 10 is a diagram illustrating the structure of a compression groove of a press machine. [Figure 7] FIG. 2 is a diagram illustrating a heating and compression step. [Figure 8] FIG. 2 is a diagram showing the configuration of a manufacturing device for a flat elongated body. [Figure 9] FIG. 2 is an exploded view of the main configuration of the manufacturing apparatus. [Figure 10] FIG. [Figure 11] FIG. 2 is a perspective view showing a flat elongated body. [Figure 12] FIG. 2 is a cross-sectional view of a flat elongated body. [Figure 13] FIG. 2 is a cross-sectional view showing the configuration of a main part. [Figure 14] This is a photograph in place of a drawing. DETAILED DESCRIPTION OF THE INVENTION

[0014] (Technical idea of ​​the present invention) Next, the technical concept of the present invention will be explained. The present invention discloses a technique not found in the prior art in which "long bodies each provided with an adhesive layer are arranged in parallel without any gaps, and then laminated while being flattened."

[0015] The present invention may be modified in various ways and may have various forms, and embodiments will be described in detail herein. However, this is not intended to limit the present invention to the specific disclosed forms, but rather to include all modifications, equivalents, and alternatives falling within the scope of the technical spirit and technology of the present invention. Similar reference numerals are used throughout the drawings to refer to similar components. Terms such as "first," "second," etc. may be used to describe various components, but these components should not be limited by these terms. These terms are used only to distinguish one component from another. The terms used in this application are used solely to describe specific embodiments and are not intended to limit the present invention. The singular expressions include the plural expressions unless the context clearly dictates otherwise. In this application, terms such as "comprise," "comprise," and "are" are intended to specify the presence of a feature, numeral, step, operation, element, component, or combination thereof described in the specification, but should not be understood to preclude the presence or addition of one or more other features, numerals, steps, operations, elements, components, or combinations thereof.

[0016] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms as defined in commonly used dictionaries should be interpreted to have a meaning consistent with the meaning they have in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this application.

[0017] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The same reference numerals refer to the same components regardless of the drawings. Duplicate descriptions will be omitted in the embodiments. Although the following describes embodiments and examples thereof, the present invention is not limited to these and may be any other invention as long as it is based on the above technical idea.

[0018] (Method of manufacturing a flat elongated body) First Embodiment An example of a method for manufacturing a flat, elongated body according to an embodiment of the present invention will now be described. An outline of the manufacturing flow for a flat, elongated body is shown in Figure 1. The manufacturing flow for a flat, elongated body can be broadly divided into a group of steps for preparing and arranging the elongated body (S1 to S2 in the figure), steps for preparing and arranging a laminate layer (S3 to S4), a step for preparing a press (S5), and a step for heating and compressing the elongated body and laminate layer in the press (S6). The number of times and embodiments of each step are not limited to those described below, and each step may be divided into multiple steps or combined with other steps before or after the step, as long as the technical significance of each step is not lost.

[0019] (Long body preparation process: S1) First, a plurality of elongated bodies are prepared. The elongated bodies may be cables, tubes, or any other linear bodies extending in the longitudinal direction. When cables are used, various types of cables may be selected, such as single-wire cables, coaxial cables, and composite cables. These may be the same or a combination of the above. Each of the plurality of elongated bodies has an adhesive layer formed on the outermost layer. In this embodiment, the material of the adhesive layer is, for example, polyurethane, but is not limited to this. Examples include thermosetting resins such as polyester resin and polyesterimide resin, as well as epoxy resin, acrylic resin, ethylene-vinyl alcohol copolymer (EVA), polyvinyl acetal resin [e.g., polyvinyl formal, polyvinyl butyral (PVB), modified PVB, etc.], vinyl chloride resin, hot melt adhesive, sealant film, etc. In this embodiment, as shown in FIG. 2, six elongated bodies 100 each having an adhesive layer 110 formed thereon are prepared.

[0020] In this embodiment, cables of the same diameter are prepared, but this is not limited to this, and multiple long bodies with radii satisfying the relationship d1≦dn, i.e., multiple cables of different sizes, may be prepared.

[0021] (Long body placement process: S2) Next, the plurality of elongated bodies 100 prepared as described above are arranged in parallel in the horizontal direction as shown in Fig. 3. At this time, the elongated bodies 100 are arranged in contact with each other without leaving any gaps between them.

[0022] (Laminate layer preparation process: S3) Next, a first sheet 120 and a second sheet 130 are prepared for laminating the plurality of elongated bodies 100. The first sheet 120 and the second sheet 130 are sheet-like and have a size greater than at least the overall width and length of the plurality of elongated bodies arranged in parallel, and in this embodiment are made of, for example, stretched polytetrafluoroethylene, but are not limited to this and any material can be selected within the scope of the present invention. In addition, in this embodiment, the thickness of each of the first sheet 120 and the second sheet 130 is 0.4 mm, but this is not limiting and sheets of different thicknesses may be used.

[0023] (Laminate layer arrangement) Next, the first sheet 120 and the second sheet 130 prepared above are arranged in a state in which the plurality of elongated bodies 100 arranged in parallel in the elongated body arrangement step (S2) are sandwiched between them (see FIG. 4).

[0024] (Press machine preparation process) Next, a press is prepared. The press may be any press capable of heating, and in this embodiment, as shown in Fig. 5, a block-shaped mold is used that can press the first sheet 120 and the second sheet 130 together. As shown in Figure 5, the press machine in this embodiment is composed of a pair of a first (upper) press machine 140 and a second (lower) press machine 150, and each of these first (upper) press machine 140 and second (lower) press machine 150 has first compressed grooves 140G and second compressed grooves 150G formed on the surface that clamps the multiple cables 100 and the first and second sheets 120, 130, in numbers corresponding to the number of long bodies prepared.

[0025] In this embodiment, a block-shaped mold capable of pressing all at once is used, but the present invention is not limited to this, and a metal compression roll may also be used.

[0026] FIG. 6 is a diagram illustrating the structure of the compression grooves of the presses. This figure illustrates the side of the presses (first press 140 and second press 150). As shown in the figure, compression grooves 140G and 150G are formed in the first press 140 and second press 150, respectively. These compression grooves 140G and 150G have semicircular cross-sectional shapes extending in the longitudinal direction of the presses.

[0027] The presses 140 and 150 are formed so that the thicknesses (T2a, T2b) of the boundaries 140b and 150b of adjacent positioning grooves are smaller than the thicknesses (T1a, T1b) of the edge portions 140a and 150a at both ends. The depth lengths (L1, L2) of the compressed grooves 140G and 150G refer to the distance from the deepest point P1 to the line connecting the edges of the presses at both ends (the dashed line in the figure). The depth lengths (L1, L2) of the compressed grooves are formed so as to be smaller than the radius (d1) of the corresponding elongated body.

[0028] (heating and compression process)

[0029] Next, the plurality of cables 100 and the first and second sheets 120, 130 prepared and arranged by the above-described process are pressed in the first and second presses 140, 150 in a heated state using a heat source (not shown).

[0030] Through the above process, the first and second sheets 120, 130 are bonded together while sandwiching the parallel-arranged cables 100. Furthermore, the first and second sheets 120, 130 are bonded to the cables 100 by heating and melting the adhesive layers 110 of the cables 100.

[0031] Furthermore, the depth direction length (L1, l2) of the compression groove is formed to be smaller than the radius (d1) of the corresponding elongated body, so that the cable is flattened in the horizontal direction (left and right direction in Figure 7).

[0032] As described above, according to this embodiment, the pair of presses 140, 150 are provided with a plurality of compression grooves 140G, 150G into which each cable 100 fits, thereby preventing the cables 100 from shifting position during thermocompression bonding and stabilizing the arrangement of the cables 100. Furthermore, the pair of presses 140, 150 not only heat and melt the adhesive layer 110 of the cable 100 to bond the first and second sheets 140, 150 to the cable 100, but also flatten the cable 100 horizontally, pressing adjacent cables 100 against each other, thereby allowing the adjacent cables 100 to be bonded to each other by their respective adhesive layers 110.

[0033] (Method of manufacturing a flat elongated body) First Embodiment FIG. 8 is a diagram showing the configuration of a manufacturing apparatus for a flat elongated body according to the first embodiment, which is related technology to the present invention; FIG. 9 is an exploded view of the configuration of the manufacturing apparatus; and FIG. 10 is a diagram showing the configuration of the main parts.

[0034] This flat elongated body manufacturing apparatus is a manufacturing apparatus for a flat cable 7 including a plurality of linear bodies 1 arranged in parallel with no gaps between them and two strip-shaped films 3, 5 that sandwich the plurality of linear bodies 1, and includes as a component a pair of first thermocompression rollers 11, 13 as shown in Fig. 1. As shown in Fig. 9, each of the plurality of linear bodies 1 has a round cross section and an adhesive layer 2 formed on the outermost layer.

[0035] As shown in Fig. 8, a pair of first thermocompression rollers 11, 13 sandwich and heat the films 3, 5 and multiple linear bodies 1 supplied from film rolls 21, 22 and a conductor drum (not shown) located upstream in the conveyance direction A, thereby heating and applying pressure to heat and melt the adhesive layer of the linear body 1 and bonding the films 3, 5 and the linear body 1 together as shown in Fig. 5. Here, the films 3, 5 are supplied to the first thermocompression rollers 11, 13 with the linear body 1 sandwiched between them from above and below. In this embodiment, both first thermocompression rollers 11, 13 are provided with a heat source (not shown).

[0036] The outer peripheries of the pair of first thermocompression rollers 11, 13 are provided with a plurality of positioning grooves 23, 24, each having a semicircular cross section extending in the circumferential direction, into which each linear body 1 fits at positions corresponding to the linear body 1 during thermocompression bonding, in a manner corresponding to the spacing (arrangement pitch) of the linear bodies 1. The first thermocompression rollers 11, 13 are made of metal.

[0037] The depth lengths (L3, L4) of the positioning grooves 23 are formed to be smaller than the radius (d1) of the corresponding filament 1. FIG. 10 is a diagram illustrating the depth lengths (L1, L2) of the positioning grooves 23, 24. As shown in the figure, the first thermocompression rollers 11, 13 are formed so that the diameters (D2a, D2b) of the boundaries 11a, 11b of adjacent positioning grooves are smaller than the diameters (D1a, D1b) of the end edges 11a, 13a. The depth lengths (L11, L13) of the positioning grooves 23, 24 refer to the distances from the deepest portions P111, P13 to the lines connecting the end edges 11a, 11b, 13a, 13b of the first thermocompression rollers 11, 13.

[0038] With this configuration, as shown in Figure 8, the first thermocompression rollers 11, 13 are configured so that a plurality of linear bodies 1 supplied in parallel from the upstream side in the conveying direction A are fitted into and positioned in the positioning grooves 23, 24 of the lower first thermocompression rollers 11, 13, and are then fixed to the films 3, 5. At this time, the depth direction lengths (D1a, D1b) of the positioning grooves 23, 24 are smaller than the radius (d1) of the corresponding elongated bodies, so the cables are crushed so as to be flattened in the horizontal direction.

[0039] As described above, according to this embodiment, the first thermocompression rollers 11, 13 of the pair that are positioned on the linear body 1 side during thermocompression bonding are provided with multiple positioning grooves 23, 24 into which the linear body 1 fits, thereby preventing misalignment of the linear body 1 during thermocompression bonding and stabilizing the arrangement of the linear body 1. Furthermore, the pair of first thermocompression rollers 11, 13 not only heat and melt the adhesive layer of the linear body 1 to bond the films 3, 5 to the linear body 1, but also flatten the linear body 1 horizontally, pressing adjacent linear bodies 1 against each other, thereby bonding adjacent linear bodies 1 to each other via their respective adhesive layers 2.

[0040] (Flat elongated body) First Embodiment FIG. 11 is a perspective view of a flat, elongated body according to a first embodiment of the present invention, which is related art to the present invention, FIG. 12 is a cross-sectional view of the flat, elongated body, and FIG. 13 is a diagram showing the configuration of the main parts of the flat, elongated body.

[0041] As shown in Figures 11 to 13, the flat elongated body of the first embodiment comprises a plurality of filaments 200, adhesive layers 210 that individually cover these filaments 200, and laminate layers 230, 240 that collectively cover the plurality of elongated bodies with the adhesive layers 210 covering them.

[0042] The filament 200 may be a cable, a tube, or any other long body extending in the longitudinal direction, and when a cable is used, various cables can be selected, such as a single-wire cable, a coaxial cable, or a composite cable, and these may be the same or a combination of the above. In this embodiment, the multiple filaments are six cables 200 arranged in parallel, each cable being made up of a conductor and a coating layer (not shown).

[0043] Adhesive layer 210 covers the outer periphery of cable 210 and is made of polyurethane in this embodiment. Note that the material of adhesive layer 210 is not limited to this, and examples include thermosetting resins such as polyester resin and polyesterimide resin, as well as epoxy resin, acrylic resin, ethylene-vinyl alcohol copolymer (EVA), polyvinyl acetal resin [for example, polyvinyl formal, polyvinyl butyral (PVB), modified PVB, etc.], vinyl chloride resin, hot melt adhesive, sealant film, etc.

[0044] The laminate layers 230 and 240 are bonded together from above and below in FIG. 12, sandwiching the parallel-arranged cables 200 so as to entirely cover the cables 200 coated with the adhesive layer 210 . Here, the laminate layers 230 and 240 are made of sheet-shaped EPTFE (expanded polytetrafluoroethylene). However, the material of the laminate layers 230 and 240 is not limited to this, and any material can be selected within the scope of the spirit of the present invention.

[0045] 13 is a diagram showing the main configuration of this embodiment, and as shown in the figure, the thickness of the adhesive layer 210 varies depending on the coated location. Specifically, in the cross-sectional view shown in the figure, the thickness (T210a) of the adhesive layer 210 in the vertical direction (up-down direction) from the center of the cable 200 and the thickness (T210b) of the adhesive layer 210 in the horizontal direction (left-right direction) from the center of the cable are such that T210a>T210b.

[0046] As means for constituting the difference in the thickness of the above-described adhesive layer 210, there are various ones. In the present embodiment, by using the above-described manufacturing method and manufacturing apparatus, the cable 200 is flattened by the pressing of the press, and the adjacent cables 200, 200 approach each other so as to press against each other, whereby the adhesive layer is adhered in a crushed state. On the other hand, the thickness (T210a) of the adhesive layer 200 in the vertical direction (up and down direction) from the center of the cable 200 is restored to a constant thickness when the pressing of the press is released. Therefore, the state of thickness T210a > T210b is achieved.

[0047] According to such a configuration, compared with the case where the thicknesses T210a and T210b are the same, the interval between the adjacent cables 200 can be made closer, and the overall width of the flat long body can be made smaller. Therefore, space saving can be realized.

[0048] Also, as another embodiment, it may have the following constituent elements. A plurality of long bodies arranged in parallel without an interval and each covered with a first adhesive layer independent of each other, A laminate layer made of a porous material and covering the plurality of long bodies together, A flat long body, characterized in that the porosity P1 of the first region of the laminate layer in the first direction perpendicular to the center of the cross section of the long body and the porosity P2 of the second region along the second direction horizontal from the center of the long body satisfy P1 < P2.

[0049] Furthermore, as another embodiment, it may have the following constituent elements. A plurality of long bodies arranged in parallel without an interval and each covered with a first adhesive layer independent of each other, A laminate layer covering the plurality of long bodies together, A flat long body, characterized in that at least one first long body among the plurality of long bodies has an elliptical cross section by compression.

[0050] Another embodiment may include the following components. The first elongated body is a flat elongated body having a flattening ratio f (wherein f=(S1-S2 / S1) where S1 is the major axis and S2 is the minor axis) of 0.01 or more.

[0051] Another embodiment may include the following components. a plurality of linear bodies arranged in parallel and independent of each other; a first adhesive layer covering each of the plurality of filaments; A flat elongated body, characterized by comprising a second adhesive layer that covers at least two of the plurality of filaments from the outside of the first adhesive layer.

[0052] Another embodiment may include the following components. A flat, elongated body, characterized in that adjacent first and second filaments of the plurality of filaments each have an adhesive portion where they are adhered to each other by the first adhesive layer.

[0053] Another embodiment may include the following components. The second adhesive layer covers the plurality of filaments except for the adhesive portion.

[0054] Another embodiment may include the following components. A flat elongated body further comprising a covering layer that covers the second adhesive layer.

[0055] Another embodiment may include the following components. a plurality of linear bodies arranged in parallel and independent of each other; a first adhesive layer covering each of the plurality of filaments; A flat elongated body, characterized by comprising a second adhesive layer covering at least two of the plurality of filaments from a first direction.

[0056] Another embodiment may include the following components. A flat, elongated body, characterized in that adjacent first and second filaments of the plurality of filaments each have an adhesive portion where they are adhered to each other by the first adhesive layer.

[0057] Another embodiment may include the following components. The flat elongated body is characterized in that the second adhesive layer covers the plurality of filaments except for the adhesive portion.

[0058] Another embodiment may include the following components. A flat elongated body further comprising a covering layer that covers the second adhesive layer.

[0059] Another embodiment may include the following components. a plurality of linear bodies arranged in parallel and independent of each other; a first adhesive layer covering each of the plurality of filaments; A flat, elongated body characterized in that at least two of the plurality of filaments are provided with a covering layer that covers the outside.

[0060] Another embodiment may include the following components. A flat, elongated body, characterized in that adjacent first and second filaments of the plurality of filaments each have an adhesive portion where they are adhered to each other by the first adhesive layer.

[0061] Another embodiment may include the following components. The flat elongated body is characterized in that the second adhesive layer covers the plurality of filaments except for the adhesive portion.

[0062] Another embodiment may include the following components. A flat elongated body further comprising a covering layer that covers the second adhesive layer.

[0063] Another embodiment may include the following components. a plurality of linear bodies arranged in parallel and independent of each other; a first adhesive layer covering each of the plurality of filaments; a second adhesive layer that covers at least two of the plurality of filaments from the outside of the first adhesive layer; adjacent filaments have first adhesive portions bonded to each other by the first adhesive layer; The second adhesive layer covers the plurality of filaments in a state where a void portion is formed around the first adhesive portion.

[0064] Another embodiment may include the following components. the second adhesive layer comprises an upper adhesive layer and a lower adhesive layer; A flat, elongated body, wherein the gap is formed by the upper adhesive layer and / or the lower adhesive layer.

Claims

1. a step of preparing a plurality of elongated bodies each coated with a first adhesive layer and having a radius satisfying the relationship d1≦dn; a long body arranging step of arranging the plurality of long bodies in parallel without any gaps; a lamination preparation step of preparing a first laminate layer and a second laminate layer for laminating the plurality of elongated bodies; a laminate layer arranging step of arranging the first laminate layer and the second laminate layer so as to sandwich the plurality of elongated bodies arranged in parallel; a press machine preparation step of preparing a press machine having compression grooves formed in a number corresponding to the number of the plurality of elongated bodies; a heating and compressing step of compressing the plurality of elongated bodies, the first laminate layer, and the second laminate layer arranged in the laminate layer arrangement step by the heated press; A method for manufacturing a flat elongated body, characterized in that the depth direction lengths (L1 to Ln) of the compression grooves of the press are smaller than the radii (d1 to dn) of the corresponding elongated bodies.

2. The method for manufacturing a flat elongated body according to claim 1 , wherein the press is a compression roll.

3. The method for manufacturing a flat elongated body according to claim 1 , wherein the first and / or second laminate layer further has a second adhesive layer on the side of the plurality of elongated bodies.

4. The method for producing a flat elongated body according to claim 1 , wherein in the rolling step, the plurality of elongated bodies are compressed so as to be flattened in the width direction.

5. The method for manufacturing a flat elongated body described in claim 1, characterized in that the depth-wise length (L1 to Ln) of the compression groove of the press is at least 1% or more smaller than the corresponding radius (d1 to dn) of the elongated body.

6. a plurality of elongated bodies arranged in parallel without any gaps and each coated with a first adhesive layer that is independent of one another; a laminate layer that collectively covers the plurality of elongated bodies, A flat elongated body, characterized in that T1, the thickness of the first adhesive layer on a line connecting the centers of the cross sections of two adjacent elongated bodies, and T2, the thickness of the first adhesive layer in a first direction perpendicular to the center of the cross section of the elongated body, are T1 < T2.

7. a plurality of elongated bodies arranged in parallel without any gaps and each coated with a first adhesive layer that is independent of one another; a laminate layer made of a porous material and covering the plurality of elongated bodies together; The porosity P1 of the first region of the laminate layer in the first direction perpendicular to the center of the cross-section of the long body and the porosity P2 of the second region along the second direction horizontal from the center of the long body satisfy P1 < P2, characterized in that it is a flat long body.

8. A plurality of long bodies arranged in parallel without intervals and each covered with a first adhesive layer independent of each other, and a laminate layer covering the plurality of long bodies together, where at least one first long body among the plurality of long bodies has an elliptical cross-section due to compression, characterized in that it is a flat long body.

9. The first long body has a flatness ratio f (when the long axis is S1 and the short axis is S2, f = (S1 - S2 / S1)) of 0.01 or more, characterized in that it is the flat long body according to claims 6 to 8.

10. A plurality of linear bodies arranged in parallel and independent of each other, a first adhesive layer covering each of the plurality of linear bodies, and a second adhesive layer covering the plurality of linear bodies from the outside of at least two or more first adhesive layers, characterized in that it is a flat long body.

11. The adjacent first linear body and second linear body of the plurality of linear bodies each have an adhesive portion adhered to each other by their respective first adhesive layers, characterized in that it is the flat long body according to claim 10.

12. The second adhesive layer covers the plurality of linear bodies except for the adhesive portions, characterized in that it is the flat long body according to claim 10.

13. It further comprises a covering layer covering the second adhesive layer, characterized in that it is the flat long body according to claim 10.

14. A plurality of linear bodies arranged in parallel and independent of each other, a first adhesive layer covering each of the plurality of linear bodies, and a second adhesive layer covering the plurality of linear bodies from the first direction for at least two or more, characterized in that it is a flat long body.

15. The adjacent first linear body and second linear body of the plurality of linear bodies each have an adhesive portion adhered to each other by their respective first adhesive layers, characterized in that it is the flat long body according to claim 14.

16. The second adhesive layer covers the plurality of linear bodies except for the adhesive portions, characterized in that it is the flat long body according to claim 14.

17. It further comprises a covering layer covering the second adhesive layer, characterized in that it is the flat long body according to claim 14.

18. a plurality of linear bodies arranged in parallel and independent of each other; a first adhesive layer covering each of the plurality of filaments; A flat, elongated body characterized in that at least two of the plurality of filaments are provided with a covering layer that covers the outside.

19. 19. The flat elongated body according to claim 18, wherein adjacent first and second filaments of the plurality of filaments each have an adhesive portion where the first adhesive layer adheres the first filament to the second filament.

20. 19. The flat elongated body according to claim 18, wherein the second adhesive layer covers the plurality of filaments except for the adhesive portion.

21. The flat elongated body according to claim 18, further comprising a covering layer that covers the second adhesive layer.

22. a plurality of linear bodies arranged in parallel and independent of each other; a first adhesive layer covering each of the plurality of filaments; a second adhesive layer that covers at least two of the plurality of filaments from the outside of the first adhesive layer; adjacent filaments have first adhesive portions bonded to each other by the first adhesive layer; The flat elongated body, wherein the second adhesive layer covers the plurality of filaments in a state in which a void portion is formed around the first adhesive portion.

23. the second adhesive layer comprises an upper adhesive layer and a lower adhesive layer; The flat elongated body according to claim 1 , wherein the gap is formed by the upper adhesive layer and / or the lower adhesive layer.

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