JP4331880B2 - Three-dimensional network and method for producing the same - Google Patents

Description

【００２６】
（実施例７） 実施例１の金型と同じ山谷の深さだが、三角柱の方向が９０゜異なる図５Ｃの金型１５を用い、実施例１と同様にして作成し、図６に例示する傾斜地緑化用の網状体１３を得た。該網状体は、金型の山で進行方向に面する部分の網状物２２は密に積層され、反対側の部分２１は大部分のフィラメントが一気に谷を下る様な模様で、網状物２２に比べかなり疎な網状物２１を形成しており、図７に示す様に、角度４５゜に傾斜したベニア板の上に、疎な網状物２１を上側として網状体１３を設置し、これに庭の土を大まかに砕いて移植ごてを用いて充填したところ、容易に図７に例示する様な土の充填ができた。実際には、土壌に草花の種を混ぜ、この土をもう少し減らして充填すれば、ビルなどの屋上緑化に都合良く供すことができると考える。
【００２７】
【発明の効果】
本発明の１つは、立体網状体の断面が、三角形が横に繋がったプリーツ形状で、その１辺を立体網状体の上下面と仮想する、三角形状がしっかりと固定されて耐圧性を向上させたものであるが、該網状体の内部は網状物の壁で構成されており、該網状物は熱可塑性樹脂のフィラメントで構成されているため、嵩高で、通気性と通水性に優れており、空隙率が極めて大きいため軽量で、施工場所に運びかつ施工するに便利であり、従来のものより強度が向上しているため、従来品よりきつい使用条件に耐え得ることができるため、より汎用できる植生用土木資材とできる。また、もう１つの、土壌の保持性を目的とした網状体１３は、前記した網状体では土壌の充填が困難であった網状物の内部に土壌の充填が容易であり、かつ、内部に閉鎖的な空洞がなく、未充填の部分の発生が抑制されているため、同じ厚みの網状体でも、土壌の保持量が従来より大幅に増やすことができるので、ビルの屋上緑化資材として好適である。また該立体網状体を構成する連続フィラメントを可撓性ネットで補強することにより、立体網状体の引張強度や耐圧強度の向上、さらには立体網状態同士の係合や持ち運び性を付与することができる。
【図面の簡単な説明】
【図１】 本発明の耐圧性が向上した網状体の製造装置の概略図である。
【図２】 図１Ａの上部から見た拡大図である。
【図３】 本発明の耐圧性が向上した網状体の一実施形態を示す斜視図である。
【図４】 本発明の折り曲げと巻取りを可能とした一実施形態図である。
【図５】 金型の例 Ａ：実施例１に使用する例 Ｂ：実施例２に使用する例
Ｃ：実施例５に使用する例 Ｄ：比較例に使用する例
Ｃ：実施例８に使用する例 Ｄ：比較例に使用する例
【図６】 実施例５の網状体の一実施形態を示す斜視図である。
【図７】 本発明の充填性を目的とした網状体の実施形態を示す斜視図である。
【図８】 連続フィラメントが可撓性ネットで絡ってなる可撓性ネットで補強された立体網状体を説明するための斜視図である。
【符号の説明】
１ 連続フィラメント
２ 紡糸口金
３ 連続フィラメントが金型の上で融着接着した網状物
４、１４、１５、１６ 金型
５、１３ 本発明の立体網状体
６ 圧着ロール
７、８ ガイドロール
２１ 連続フィラメントが疎の壁
２２ 連続フィラメントが密の壁
２３ 充填された土壌
２４ ベースのベニア板
２５ 可撓性ネット[0001]
BACKGROUND OF THE INVENTION
The present invention is a drainage material that can apply earth pressure and is always subjected to compressive stress in the thick direction, and can quickly discharge diverted water, such as a drainage material at the bottom of a waste disposal site and a separation wall drainage material of a tunnel. Therefore, it is possible to cope with civil engineering materials that are required to have higher compressive stress than conventional drainage materials. Of course, soil preservation in conventional civil engineering foundation materials and tree planting works, soil runoff prevention and ground in slope strengthening construction and revetment construction In the civil engineering field such as prevention of spillage, and in the field where a larger volume is required, the assembly member of the three-dimensional network structure that is assembled by bending or bonding the three-dimensional network body, and a large gap such as a bed pad The present invention relates to a three-dimensional network that can be applied to the bedding field where cushioning is required.
[0002]
[Prior art]
In the waste disposal site, the bottom surface is formed with a water-blocking structure to prevent groundwater contamination due to water leakage, and the surface drainage material that collects and drains sewage flowing away from the waste layer is used at the top, Filaments disclosed in Japanese Patent Publication No. 58-9186 and Japanese Patent Laid-Open No. 11-247060 are fused and integrated into the surface drainage material, and the entire surface drainage material has an uneven shape and has a certain thickness. A pine-like three-dimensional mesh body is used, and the water spilled from the back of the tunnel or concrete retaining wall found in Japanese Patent Laid-Open No. 5-118196 using this three-dimensional network body is drained. Since the drainage material is made of plastic and light in weight, construction is easy and frequently used.
[0003]
Moreover, as a water-impervious structure of the above-mentioned waste disposal site, it is simpler to use a rubber sheet or a plastic sheet as a water-stopping material, compared to a rigid construction method such as cementing, which has been conventionally performed. There is a problem that the sheet breaks and water leaks, and attempts are made to improve them.When impermeable membranes are arranged on the top and bottom and drainage material is provided in the middle layer, Water-impervious agent is injected to perfect the water-impervious structure, water-impervious material sandwiched between double liner construction drainage material that doubles as a check and repair of the water-impervious structure, and can be handled as the water-impervious structure In order to facilitate the use of a three-dimensional network with large voids as in the present invention, a device for spraying a water-stopping material on the three-dimensional network with a substance that easily swells with water, such as bentonite, is disclosed in JP-A-6-341124. Publication, JP-A-5-10 No. 8 and Japanese Patent Laid-Open No. 4-146319 are disclosed, and furthermore, a water stop is assumed in the case where a portion where the water stop effect is reduced to cause water leakage is generated. However, in any case, it has been desired that the three-dimensional network is more pressure resistant.
[0004]
In addition, a wide variety of construction methods have been proposed in order to maintain a more natural environment by filling soil and sand into civil engineering materials and maintaining a more natural environment. However, the customer soil vegetation method, in which three-dimensional nets are attached to the inclined surface and fixed, and the soil containing the seeds is sprayed, is widely used because of its excellent workability and economy. ing. And in order to hold | maintain more customer land, the bulky three-dimensional network body has been desired.
[0005]
[Problems to be solved by the invention]
The above-mentioned filaments disclosed in Japanese Patent Publication No. 58-9186 and Japanese Patent Laid-Open No. 11-247060 are fused and integrated to form an overall concavo-convex shape with a certain thickness. Conventionally, the three-dimensional network has been used for greening work by covering the soil, so there is no need to strengthen the compression resistance particularly in the thickness direction, and the above-mentioned earth pressure is applied and the compressive stress is always in the thickness direction. In the development of drainage materials that require quick discharge of hanging water, the amount of filaments was initially increased, and a more dense mesh was used, but in terms of cost, product weight, and product Therefore, there is a need for a three-dimensional network that is lighter, has a higher porosity, and a higher compressive stress than conventional drainage materials. Also, the conventional three-dimensional network is required to be lighter if the conventional function can be maintained.
[0006]
In addition, energy saving effects that can reduce cooling costs by covering with soil and natural appearance by planting vegetation are attracting attention, and greening of buildings has attracted attention, and various greening materials have been developed. However, there was no vegetation base material with excellent soil retention enough to handle steep slopes. Further, there is a demand for a three-dimensional network having a higher bulk and rigidity, such as an artificial floating island that greens floating lake water on the lake surface and purifies the lake water with vegetated plants.
[0007]
The purpose of the present invention is for applications in which compressive stress is always applied in the thickness direction due to earth pressure, compressive stress is greater than conventional drainage materials, thickness decrease is small even under high load, and high porosity is maintained. 3D network body and its cylindrical body that can quickly discharge the turbulent water, and 3D network body that has the same compressive strength and reduced the amount of filaments to improve soil filling, Conventionally, these three-dimensional network bodies are bonded and assembled as a bulky and rigid network body, and materials such as a three-dimensional network structure having a thickness of several tens of centimeters, which was impossible with a conventional three-dimensional network body, are used in civil engineering. It is to be provided as a material.
[0008]
[Means for Solving the Problems]
Observe the compression behavior of a conventional mesh body, and the more walls made of a mesh-like material with the filaments fused and bonded, the higher the compressive stress and the triangle the wall has one ridgeline When it is restricted that the two sides of the shape and the side corresponding to the ridge line is fixed and spread by a flat body such as a nonwoven fabric, the resistance to compression in the thickness direction is found to be large and these are described in detail. The present invention has been studied.
That is, according to the present invention, a reticulate body having a thickness of several millimeters is continuously formed in a pleated shape in a cross section in the thickness direction, in which a large number of continuous filaments are overlapped in a reticulate shape and fused and bonded at their intersections. By forming a three-dimensional network having an apparent thickness of several centimeters in which a large number of ridges and grooves are alternately formed, and a large gap is formed by the irregularities of the network, a three-dimensional network having an apparent thickness of several centimeters is formed. The number of walls per unit surface area and the area of the wall can be overwhelmingly higher than the three-dimensional network that has no plan for unevenness in the thickness direction of the body and has not been considered to increase the wall of the network connecting the upper and lower surfaces. These walls can exert a great resistance against the compressive stress in the thickness direction of the three-dimensional network. In addition, the present inventors previously proposed a three-dimensional network having a triangular cross-section with a thickness cross section by pasting a nonwoven fabric or the like on at least one side of the pleated three-dimensional network, but as a result of further investigation, In the case of a sample of about A4 size, if at least one surface is not fixed with a nonwoven fabric or the like, the pleat ridge line slides due to compression from the thickness direction and the pleat spreads, and does not show a great compression resistance, but at least 50 cm □ of the present invention. Even if a three-dimensional net is sandwiched between upper and lower plywood and placed on the top, the pleat ridgeline slips and the pleat spreads are not seen in the center. It is a construction with a large width, and it is reconfirmed that even if the nonwoven fabric is not pasted on at least one side, the same effect as the three-dimensional network with the nonwoven fabric pasted is exhibited. It was was.
[0009]
More specifically, it is essential to minimize the area of the mesh that occupies the upper and lower surfaces of the three-dimensional network, and maximize the area of the wall that connects the upper and lower surfaces of the mesh with the filaments fused and bonded. If the distance between the upper and lower surfaces is as small as possible, that is, the number of pleat creases is increased, and the mesh weight of the reticular body and the fiber diameter thereof are within the appropriate ranges described later, the compression resistance in the thickness direction and the overall rigidity are further exhibited. it can.
[0010]
Specifically, a large number of continuous filaments made of a thermoplastic synthetic resin having a thickness of 0.1 to 1.5 mm are overlapped in a net shape, and are fused and bonded at their intersections, and the substantial thickness is 0.00. 1 to 4 mm of a net-like body is formed, the net-like body is pleated in a cross section in the thickness direction, and a plurality of ridges and grooves continuously in one direction are alternately arranged in an orderly manner, The present invention relates to a three-dimensional network having an apparent thickness of 4 to 50 mm, which has a mat shape in which large voids are formed by unevenness.
[0011]
Further, the three-dimensional network of the present invention is more rigid in structure than the conventional three-dimensional network, and is inconvenient to wind or fold. Therefore, it is advantageous to provide a fold part and / or a groove part that easily crosses the ridges in the direction in which the ridges extend so that the folds can be wound or folded.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples. FIG. 1 shows a schematic side view of an apparatus for manufacturing a three-dimensional network 5 having a large number of pleat cross sections according to the present invention. FIG. 2 is an enlarged view seen from the upper part of FIG. 1A.
[0013]
The form of the mesh body according to the present invention is, for example, as shown in FIGS. 3 and 4, and the mesh body has a shape in which a triangular prism is laid down from a spinneret 2 for melt spinning. It is discharged onto the mold 4 and overlapped in a net shape to melt and bond the intersections, and is pressed against the upper surface of the mold by the pressure roller 6 to further press-bond the fusion bonded net on the convex portion of the mold. Then, shaping the three-dimensional network and reinforcing the upper end of the heel part to form a three-dimensional network having a pleated cross section in the thickness direction, and forming large gaps by triangular prism-shaped irregularities in the lower part of the three-dimensional network and the upper part of the groove A mat-like net 5 is provided.
[0014]
In the pressure resistance improvement application which is one form of the present invention, the pressure resistance is obtained by receiving the compressive force in the thickness direction by the triangular cross-sectional structure in which the surface layer of the three-dimensional network body is assumed to be one side in orderly arranged in parallel. In addition, the triangular cross-sectional structure that contributes to the pressure resistance by arranging the triangular cross-sectional structure in a pleated form in the horizontal direction in order to maximize the pressure resistance strength as a whole Can be greatly improved. For the purpose of improving pressure resistance, it is better that the two sides, which are the hypotenuses of the triangular cross-sectional structure formed by the pleats of the mesh body 5, have higher compressive strength, and the pleats exemplified in the mold 14 or 4 are mechanical machines. Use of a mold that can form a net-like material arranged in the traveling direction is advantageous because each pleat hypotenuse can be a uniform net-like material.
[0015]
Moreover, winding in the pleat flow direction as shown in FIG. 1 can be achieved by using the mold 4 of FIG. 5B and forming the mesh body 5 with a cut as illustrated in FIG. By using such a mold, a large number of consecutive saddles arranged in order and in parallel in one direction are intermittently traversed in the same direction, and / or An easily bent portion that is a groove portion may be formed. Moreover, it can be a three-dimensional network that can be folded and / or rolled up with the easily bent portion as a fulcrum. In order to bend or wind up, it is preferable that the numerous ridges arranged in an orderly manner and the easily bent portions are orthogonal to each other. In addition, using such folding and winding performance, at least 5 or more pleats are used as a set, and the ridges or grooves are cut along the flow direction of the ridge, and the ridge side is bent inside and rounded. In addition, it is possible to form a cylindrical three-dimensional network body characterized by being able to drain a large amount of water in the flow direction of the basket by fixing it with a linear object such as a string or a metal wire.
[0016]
A mesh body 13 illustrated in FIG. 6 of another embodiment of the present invention can be made by using a triangular prism mold perpendicular to the moving direction of the machine, such as C in FIG. 5, and as illustrated in FIG. The mesh body 13 is installed on an inclined surface and used as a soil retaining material that is covered with the soil 23 and greened, and the two sides of the mesh body of the triangular cross-sectional structure are the sides where the density of the continuous filament is sparse and the dense side When the mold 15 engraved with a shape in which a triangular prism is laid in the lateral direction with respect to the traveling direction illustrated in FIG. 5C is used as the mesh body, Since the continuous filament is mainly deposited on the surface of the mold 15 facing the traveling direction of the triangular prism and the other surface has a phenomenon of less deposition than the former, it can be easily made. In addition, in order to press and press the mesh body with the pressure roller 6, a triangular cross-section bridge extending in the traveling direction is arranged at least at the two ends of the engraving portion of the mold, or the laid triangular column is arranged with respect to the machine width direction. It is preferable that at least two places on the upper surface of the mold are always in contact with the pressure roller 6 by giving a slight angle. Further, in the mold used in the present invention, it is preferable that the upper surface and the bottom surface of the mold are parallel because of the use of the pressure roll 6, and the upper surfaces of the convex portions of the mold are all on the same plane.
[0017]
The mold 4 engraved with the shape of the triangular prism used in the present invention has a cross section in which the bottom surface of the mold is one side and the ridge line formed by the vertices sandwiched between equal sides is the projecting top surface of the mold. Is an isosceles triangle, and an equilateral triangle is particularly preferable. However, an unequal triangle may be used as long as the distance between the protruding top surface and the bottom surface is the same. In addition, for the convenience of hitting the net-like body with the pressure roller 6 for pressure bonding, if the ridgeline is sharp, a portion with insufficient pressure-bonding property with the plane body is likely to occur, and the plane body may be damaged. The ridge line is preferably chamfered by cutting an obtuse angle or the upper part, and the interval between the triangular prisms should be 3 mm or more, preferably 5 mm at the bottom of the mold. The continuous filament is discharged to these chamfered molds. Thus, when the net-like body of the present invention is prepared, the upper end and the bottom portion have an appropriate round shape, and the appearance-like and pleated-like cross-sections can be triangular. When the pleat angle of the three-dimensional network having a pleated cross section formed in this way is approximately 60 degrees, a three-dimensional network having excellent pressure resistance can be obtained.
[0018]
The material used for the continuous filament of the present invention is a thermoplastic resin such as a polyester such as polypropylene, polyethylene, polyethylene terephthalate, and a polyamide such as nylon 6, and these copolymers are more preferable in order to reinforce flexibility. Polymer blends and polymer alloys are also preferred.
[0019]
The thickness of the continuous filament of the present invention is preferably 0.1 to 1.5 mm from the viewpoint of strength and rigidity, and if it is thicker than 1.5 mm, it is difficult to form the mesh of the present invention, and if it is thinner than 0.1 mm, it becomes rigid. This is not preferable because problems are likely to occur.
[0020]
Further, the basis weight of the three-dimensional network according to the present invention depends on the use, but is generally in the range of 100 to 3000 g / m ^2. There is preferably 150~1500g / m ^2, depending on its thickness when the intended retention of soil, 200~1500g / m ² is preferred.
[0021]
The thickness of the three-dimensional network of the present invention is preferably 4 to 40 mm when the pressure resistance is intended to be strengthened, and 20 to 50 mm is preferably used for the purpose of retaining the soil. If the thickness exceeds 50 mm, the continuous filament comes into contact with the mold and is cooled and difficult to reach, resulting in irregularity.
[0022]
Further, in the present invention, the continuous filaments constituting the three-dimensional network are entangled with a flexible net in order to improve the shape stability and tensile strength of the three-dimensional network, and to provide mutual engagement and portability. A three-dimensional network reinforced with a flexible net is preferable. The flexible net used to reinforce the three-dimensional net is a woven net such as a fishing net with a mesh size of 15 to 50 mm □, a cold raft using a split yarn, a yarn such as a multi- or monofilament, woven in the vertical and horizontal directions. For example, a fishing net made of polyethylene terephthalate is particularly preferable in terms of strength reinforcement. Although the three-dimensional network reinforced with the net is not shown in the figure, the net is arranged and laminated on the mold of the manufacturing apparatus illustrated in FIG. Can be a three-dimensional network reinforced with a flexible net in which continuous filaments constituting the three-dimensional network are entangled with a flexible net.
[0023]
(Operation) The three-dimensional network of the present invention is composed of continuous filaments, and since liquids such as water can easily drain through the network and drain, it is suitable as a bottom drainage material for waste disposal sites. Since the solid content such as can be filtered with this filament and the outflow of the solid content can be suppressed, it is optimal as a civil engineering material for vegetation filling soil. Further, by reinforcing the continuous filament constituting the three-dimensional network body with a flexible net, it is possible to improve the tensile strength and pressure resistance of the three-dimensional network body, and to provide engagement and portability between the three-dimensional network states. it can.
[0024]
【Example】
Next, the effects of the present invention will be specifically described with reference to examples and comparative examples.
(Examples 1-6, Comparative Examples 1-2) The net | network body of this invention can be efficiently manufactured by using the metal mold | die 4 and 14 of FIG. 5A or B for the apparatus illustrated in FIG. A melt of an ethylene-propylene copolymer having a melting point of 140 ° C. and a melt flow rate of 18 g / 10 min is applied to a fiber having a fiber diameter of 0.7 mm from a spinneret 2 in which a large number of spinning nozzles having a pore diameter of 0.6 mm are arranged. The continuous filament 1 is spun, suspended on a mold engraved with a shape in which a triangular prism moving at a constant speed is laid down, overlapped in a net shape, and the intersection is fused and bonded to form a net 3 The mesh body on the mold was pressed and bonded with the roll 6 to obtain the three-dimensional mesh bodies of Examples 1 to 6 illustrated in FIGS. 3 and 4. Comparative Examples 1 and 2 were prepared in the same manner as in Examples 2 and 3 using a mold 16 that has been conventionally used by the Company illustrated in FIG. 5D. Table 1 shows the compression performance of these examples and comparative examples.
[0025]
[Table 1]

[0026]
(Example 7) The same depth of the valley as the mold of Example 1, but the direction of the triangular prism is 90 ° different from that of FIG. A net 13 for sloped greening was obtained. The reticulate body 22 is densely laminated with the reed portion 22 facing the direction of travel at the crest of the mold, and the opposite portion 21 has a pattern in which most of the filaments go down the valley at once. Compared with the veneer plate inclined at an angle of 45 °, the net body 13 is installed on the veneer plate inclined at an angle of 45 ° with the sparse net body 21 as the upper side, as shown in FIG. When the soil was roughly crushed and filled with a transplanting iron, the soil was easily filled as illustrated in FIG. In reality, if we mix grass seeds in the soil and fill it with a little less soil, we can conveniently use it for greening rooftops such as buildings.
[0027]
【The invention's effect】
One aspect of the present invention is that the cross-section of the three-dimensional network is a pleated shape in which triangles are connected horizontally, and one side of the three-dimensional network is virtually fixed to the upper and lower surfaces of the three-dimensional network. However, since the inside of the mesh body is composed of a network wall, and the mesh body is composed of filaments of thermoplastic resin, it is bulky and has excellent air permeability and water permeability. Because the porosity is extremely large, it is lightweight, convenient to carry and install to the construction site, and because it has improved strength compared to the conventional one, it can withstand harder usage conditions than the conventional one, so It can be a civil engineering material for vegetation that can be used for general purposes. In addition, another net 13 for soil retention is easy to fill the inside of the net, which was difficult to fill with the above-mentioned net, and closed inside. Since there are no typical cavities and the occurrence of unfilled parts is suppressed, the amount of soil retained can be significantly increased even with a net of the same thickness, making it suitable as a rooftop greening material for buildings. . Further, by reinforcing the continuous filament constituting the three-dimensional network body with a flexible net, it is possible to improve the tensile strength and pressure resistance of the three-dimensional network body, and to provide engagement and portability between the three-dimensional network states. it can.
[Brief description of the drawings]
FIG. 1 is a schematic view of an apparatus for producing a mesh body with improved pressure resistance according to the present invention.
FIG. 2 is an enlarged view seen from the top of FIG. 1A.
FIG. 3 is a perspective view showing an embodiment of a mesh body with improved pressure resistance according to the present invention.
FIG. 4 is an embodiment of the present invention that enables bending and winding.
5: Example of mold A: Example used in Example 1 B: Example used in Example 2 C: Example used in Example 5 D: Example used in Comparative Example C: Used in Example 8 Example D: Example used for Comparative Example FIG. 6 is a perspective view showing an embodiment of the mesh body of Example 5. FIG.
FIG. 7 is a perspective view showing an embodiment of a mesh body for the purpose of filling of the present invention.
FIG. 8 is a perspective view for explaining a three-dimensional network reinforced with a flexible net in which continuous filaments are entangled with a flexible net.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Continuous filament 2 Spinneret 3 Reticulated material 4,14,15,16 Die 5,13 in which continuous filament was fusion-bonded on the mold Solid body 6 of the present invention 6 Crimp roll 7, 8 Guide roll 21 Continuous filament Sparse wall 22 Dense wall 23 of continuous filaments Filled soil 24 Base veneer plate 25 Flexible net

Claims (7)

A large number of continuous filaments made of a thermoplastic synthetic resin and having a thickness of 0.1 to 1.5 mm are spun on a mold in which a plurality of shapes in which triangular prisms are laid are engraved. In addition, a continuous filament is superposed in a net shape, and is a net-like body integrated by fusion bonding at the intersection,
  The net thickness is 0.1 to 4 mm;
  In the mesh body, a plurality of ridges and groove portions that are linearly continuous in a direction parallel to and / or orthogonal to the traveling direction of the mold are alternately formed, and a large gap is formed by unevenness. It is formed into a three-dimensional network with a mat-shaped pleated cross-section,
  An apparent thickness of the three-dimensional network is 4 to 50 mm. A number of consecutive ridges arranged in order and parallel to one direction are intermittent in the same direction ,
The three-dimensional network body according to claim 1, wherein the groove portion that crosses the flange portion forms an easily bent portion .   3. The three-dimensional network body according to claim 2, wherein a number of ridges arranged in an orderly manner and an easily bent portion are orthogonal to each other. Continuous filaments are I fault the flexible net, three-dimensional net-like body according to claim 1, characterized in that a three-dimensional net-like body that is reinforced with a flexible net. The three-dimensional network according to any one of claims 1 to 4, wherein an angle of the pleat is 60 °.   The one of the pleat mountain (∧) and the other slope are different in the degree of mesh of the net-like material, and different ones of the degree of mesh are alternately arranged. A three-dimensional network according to any one of the above. A gold plate having a shape in which one surface of a triangular prism is on a plane, and the upper part of the ridge line where the triangular prism is not on the plane is cut and removed parallel to the plane, and the triangular prisms are regularly arranged on the plane at regular intervals. The mold is moved at a constant speed, and a large number of continuous filaments made of a thermoplastic synthetic resin having a thickness of 0.1 to 1.5 mm are spun on the mold, and the continuous filaments follow the mold. Overlaid in a net, fused and bonded at the intersection to form a net,
In the net-like body, a plurality of ridges and grooves that are linearly continuous in a direction parallel to and / or orthogonal to the traveling direction of the mold are alternately formed, and a large gap is formed by unevenness. A method for producing a three-dimensional network having a mat-shaped pleated cross-sectional structure .

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