WO2014097603A1 - Method for manufacturing metal net and metal net - Google Patents

Method for manufacturing metal net and metal net Download PDF

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Publication number
WO2014097603A1
WO2014097603A1 PCT/JP2013/007378 JP2013007378W WO2014097603A1 WO 2014097603 A1 WO2014097603 A1 WO 2014097603A1 JP 2013007378 W JP2013007378 W JP 2013007378W WO 2014097603 A1 WO2014097603 A1 WO 2014097603A1
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Prior art keywords
wire
metal
auxiliary
knitting
auxiliary wire
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PCT/JP2013/007378
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French (fr)
Japanese (ja)
Inventor
康洋 野田
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株式会社ベスト
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Publication of WO2014097603A1 publication Critical patent/WO2014097603A1/en

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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/14—Other fabrics or articles characterised primarily by the use of particular thread materials
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/22—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes specially adapted for knitting goods of particular configuration
    • D04B1/225—Elongated tubular articles of small diameter, e.g. coverings or reinforcements for cables or hoses
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/42—Circular knitting machines with independently-movable needles specially adapted for producing goods of particular configuration
    • D04B9/44—Circular knitting machines with independently-movable needles specially adapted for producing goods of particular configuration elongated tubular articles of small diameter, e.g. coverings for cables
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2101/00—Inorganic fibres
    • D10B2101/20—Metallic fibres
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2403/00—Details of fabric structure established in the fabric forming process
    • D10B2403/01—Surface features
    • D10B2403/011—Dissimilar front and back faces
    • D10B2403/0114—Dissimilar front and back faces with one or more yarns appearing predominantly on one face, e.g. plated or paralleled yarns

Definitions

  • the present invention relates to a method for producing a metal mesh obtained by knit knitting a metal wire and a metal mesh.
  • metal wires used in the production of metal mesh include metals made of copper alloys such as stainless steel wires, iron wires, copper-nickel alloys (white copper), copper-nickel-zinc alloys (white), brass, and beryllium copper.
  • Such metal nets are used in a wide range of applications by taking advantage of elements such as flexibility, stretchability, cushioning properties, and filterability in addition to the original characteristics of the metal. Specifically, for example, it is used by being compressed as a buffer material disposed around an exhaust pipe connected to the engine, or a spherical joint of an exhaust pipe connected to the engine as shown in Patent Document 1 below.
  • Patent Document 1 There are known uses in which the seal body is compressed to be used for manufacturing, or compressed and used to manufacture an inflator for an automobile airbag as shown in Patent Document 2 below.
  • Patent Document 3 for example, as shown in FIG. 11, a cylindrical metal net formed by knitting a titanium wire is formed into a predetermined shape, and the formed metal net is obtained.
  • a cell-inducing material obtained by pressing since cells are formed in the voids of the knitted titanium wire, a material excellent in integration with a living body can be obtained, and an artificial tooth root, an artificial joint, a bone It is disclosed that it can be used as a medical material for filling, skin terminals and the like.
  • the object of the present invention is to provide a method capable of stably producing a metal net even when the above-described problem, that is, a metal wire that is easily cut or a metal wire having a thin wire diameter is used.
  • a high tension is applied to the metal wire when forming a loop in the knitting operation.
  • the metal wire 1 is captured by the knitting needle 5 having the hook 5a, as shown in FIG. 12, in order to form a new loop in the previously formed loop. Thereafter, there is a step of forming a loop by bending. In such a process, the metal wire 1 receives a high tension by being pulled by the hook 5 a of the knitting needle 5.
  • the inventors of the present invention have come up with the present invention by studying earnestly that the cutting of the metal wire may be suppressed by reducing the burden on the metal wire during knitting.
  • one aspect of the present invention is a method of forming a mesh body by knitting a metal wire and an auxiliary wire made of a selectively removable material along the metal wire, And a step of selectively removing the auxiliary wire.
  • a method of manufacturing a metal net by placing an auxiliary wire to be removed later on the metal wire, the burden on the metal wire can be reduced in the process of forming a loop when knitting the knit. Can do.
  • the metal wire can be prevented from being cut.
  • the auxiliary wire is removed to stably produce a metal net while maintaining high productivity even when a metal wire that is easily cut or a metal wire with a thin wire diameter is used. be able to. Further, as a secondary effect, the friction between the metal surfaces of the knitting needle and the metal wire is reduced, so that wear of the knitting needle is suppressed, and as a result, the life of the knitting needle is prolonged.
  • the step of selectively removing the auxiliary wire is preferably a step of removing the auxiliary wire with a treatment liquid that selectively dissolves or decomposes only the auxiliary wire without removing the metal wire.
  • a treatment liquid that selectively dissolves or decomposes only the auxiliary wire without removing the metal wire.
  • water-soluble resin fibers such as water-soluble polyvinyl alcohol are used as auxiliary wires, and such water-soluble resin fibers are selectively dissolved and removed using water, preferably hot water. Is preferred.
  • a method in which an alkali-degradable fiber such as polyester is used as the auxiliary wire and the alkali-degradable fiber is selectively decomposed and removed by treatment in an alkaline aqueous solution is also preferable.
  • a method may be used in which fibers dissolved in a predetermined organic solvent are used as auxiliary wires, and such fibers are removed by dissolving in an organic solvent.
  • step of selectively removing the auxiliary wire there is a method of removing only the auxiliary wire by burning and burning the fibers as the auxiliary wire.
  • the method for producing a metal net as described above exhibits particularly excellent effects when using a metal wire that is easily cut, such as a titanium wire or an aluminum wire.
  • the auxiliary wire is a fiber including a plurality of monofilaments called multifilament or yarn
  • the multifilament is unraveled in the knitting process, and the monofilament is arranged so as to cover the periphery of the metal wire evenly. Will come to be.
  • the periphery of the metal wire is protected to further suppress the influence of friction, and the removal efficiency is improved by making the filament into a monofilament.
  • the tension applied to the metal wire can be reduced by sufficiently dispersing the tension in the auxiliary wire in the knitting process. As a result, cutting of the metal wire can be suppressed.
  • Another aspect of the present invention is a method of forming a mesh body by knitting a coated metal wire having at least a part of the outer periphery covered with an auxiliary material that can be selectively removed, and an auxiliary material from the mesh body. And a step of selectively removing the metal net.
  • a metal mesh obtained by knitting a titanium wire or an aluminum wire that has not been obtained by the conventional technique and the diameter of the wire is 40. It is possible to obtain a metal net having a diameter of 2 to 6 mm and a width of 1 to 5 mm and a mean number of cut parts per 100 cm 2 is 2 or less.
  • a metal net can be stably produced even when a metal wire that is easily cut or a metal wire having a thin wire diameter is used.
  • FIG. 1 is an explanatory view for explaining knitting by a circular knitting machine 100 for knitting a cylindrical net in the first embodiment.
  • FIG. 2 is a partially enlarged schematic view showing the stitches of the net body 9 in which the metal wire 1 and the auxiliary wire 2 are overlapped and knitted.
  • FIG. 3 is a schematic diagram showing a state in which the monofilament 2a is arranged by unraveling the auxiliary wire 2 which is a multifilament around the metal wire 1.
  • FIG. 4 is a partially enlarged schematic view showing the stitches of the metal net 10 obtained by removing the auxiliary wire 2.
  • FIG. 5 is an explanatory diagram for explaining knitting by the circular knitting machine 110 for knitting a cylindrical net in the second embodiment.
  • FIG. 6 is a partially enlarged schematic view showing the stitches of the net 19 formed by knitting the coated metal wire 11.
  • FIG. 7 is a partially enlarged schematic view showing the stitches of the metal net 20 obtained by removing the auxiliary material 12.
  • FIG. 8 is a photograph of the metal mesh of the titanium wire obtained in the example.
  • FIG. 9 is a photograph of the metal mesh of the titanium wire obtained in Comparative Example 1.
  • FIG. 10 is a photograph of the metal mesh of the titanium wire obtained in Comparative Example 2.
  • FIG. 11 is a schematic view of a metal net formed by knitting a metal wire into a cylindrical shape.
  • FIG. 12 is an explanatory diagram for explaining a state in which the hook 5a of the knitting needle 5 captures the metal wire 1 in the knitting process.
  • FIG. 1 is a schematic diagram for explaining a state in which a cylindrical net body 9 is knitted using a circular knitting machine 100 along with an auxiliary wire 2 made of a selectively removable material on a metal wire 1. It is.
  • the circular knitting machine 100 includes a guide 3 for bundling the metal wire 1 and the auxiliary wire 2, a yarn path support 4, a knitting needle 5, and the like that rotate around the rotation axis while taking a bundle of the metal wire 1 and the auxiliary wire 2.
  • a cylindrical knitting needle mount 6 for attaching book knitting needles 5 at substantially equal intervals along the circumference, and a cam for rotating each knitting needle 5 up or down by pushing the lower end of each knitting needle 5 by rotating around a rotation axis. 7.
  • a circular turntable 8 that rotates in one direction around the rotation axis by a motor (not shown) is provided.
  • the yarn guide column 4 and the cam 7 are supported by a turntable 8 and rotate around the rotation axis of the turntable 8 in synchronization with the turntable 8.
  • the knitting needle 5 has a hook 5a for capturing the metal wire 1 and a latch 5b for separating the metal wire at the tip thereof.
  • the yarn path support 4 and the cam 7 are supported by the turntable 8 and are rotated in synchronization with one direction.
  • the metal wire 1 and the auxiliary wire 2 bundled by the guide 3 are continuously drawn while the yarn path support 4 rotates.
  • each knitting needle 5 attached to the knitting needle mounting base 6 is pushed at the lower end by the cam 7 and repeats an ascending motion or a descending motion at a constant cycle.
  • the raised knitting needle 5 captures the bundled metal wire 1 and auxiliary wire 2 with the hook 5a.
  • the metal wire 1 and the auxiliary wire 2 captured by the hook 5a are bent so as to form a loop by the operation of the descending knitting needle 5.
  • the formed loop is passed through a previously formed front loop, and then the latch 5b is opened by the operation of the rising knitting needle 5 so that the loop is detached from the knitting needle 5.
  • the formed metal net 9 is pulled in the direction indicated by the down arrow in FIG.
  • a cylindrical metal net 9 having a net structure in which the metal wire 1 and the auxiliary wire are overlapped and knitted as shown in FIG. 2 is formed.
  • the type of the metal wire 1 is not particularly limited. Specific examples thereof include, for example, a titanium-based wire made of titanium or a titanium alloy; an aluminum-based wire made of aluminum or an aluminum alloy; a stainless steel wire; an iron wire; a copper-nickel alloy (white copper), a copper -Wires of copper alloys such as nickel-zinc alloy (white), brass, beryllium copper; metal wires such as nickel-based metal wires such as inconel alloy (registered trademark).
  • the wire diameter of the metal wire is not particularly limited. For example, a wire having a wire diameter of 10 to 1000 ⁇ m, more preferably 40 to 600 ⁇ m, particularly 50 to 200 ⁇ m is preferably used. Among these, the effects of the present invention are particularly prominent when a titanium-based wire or an aluminum-based wire having a wire diameter of 50 to 200 ⁇ m is used.
  • the auxiliary wire 2 is a wire that can be selectively removed while leaving the metal wire 1 by means of dissolution, decomposition, combustion, etc. in the step of removing the auxiliary wire described later after knitting.
  • auxiliary wires include, for example, water-soluble resin fibers such as water-soluble polyvinyl alcohol that can be removed with water, preferably hot water, and polyesters such as polyethylene terephthalate fibers that can be decomposed in an alkaline aqueous solution.
  • examples thereof include fibers of alkali-degradable resins such as fibers, fibers containing various resins that are dissolved in a predetermined organic solvent, and synthetic fibers and natural fibers such as acrylic fibers that are burned off by burning.
  • a fiber of a water-soluble resin such as water-soluble polyvinyl alcohol because it can be easily removed in hot water.
  • a water-soluble resin such as water-soluble polyvinyl alcohol
  • examples of the water-soluble polyvinyl alcohol fiber include trade name SOLBRON manufactured by Nichibi Corporation, and trade name mint bar manufactured by Kuraray Co., Ltd.
  • the auxiliary wire may be in the form of a strand made of single yarn fibers, or may be called a multifilament or yarn obtained by twisting a plurality of monofilaments into a composite.
  • the monofilament 2a formed by unraveling the multifilament in the knitting process is formed around the metal wire 1 as shown in FIG. It may be knitted in a form that is uniformly distributed.
  • the multifilament is twisted by the rotary motion in the knit knitting process, so that it is easily unraveled.
  • the burden due to friction with the knitting needle is further reduced by protecting a large area of the metal wire by the monofilament.
  • the contact area with the solvent or decomposing agent is increased by unraveling into monofilaments in the knitting process. This improves the dissolution rate and decomposition rate.
  • the wire diameter of the auxiliary wire is not particularly limited. Specifically, for example, a wire having a fineness of 30 to 1000 dtex, more preferably 100 to 700 dtex is preferably used.
  • the number of monofilaments (F) is preferably 9 to 200F, more preferably 50 to 200F, for example.
  • a wire material such as 31 dtex / 9F to 660 dtex / 200F is preferably used.
  • the tensile breaking strength of the auxiliary wire is higher than the tensile breaking strength of the metal wire, specifically, 1.1 times or more, further 1.5 times or more, particularly 2 times or more. preferable.
  • the tension applied to the metal wire can be reduced by dispersing the tension applied in the knitting process in the auxiliary wire. As a result, cutting of the metal wire is more sufficiently suppressed.
  • This step is performed by appropriately selecting a method capable of selectively removing only the auxiliary wire 2 without removing the metal wire 1 according to the type of the auxiliary wire 2.
  • a method of immersing the net 9 in a solution that dissolves or decomposes the auxiliary wire 2 can be used.
  • auxiliary wire 2 is a fiber of water-soluble polyvinyl alcohol
  • a method of dissolving and removing the auxiliary wire 2 by immersing the net 9 in water, preferably hot water can be mentioned.
  • the water temperature and treatment time are appropriately selected according to the dissolution rate and solubility of the water-soluble polyvinyl alcohol.
  • hot water 50 ° C. or higher, more preferably 70 ° C. or higher, particularly 90 ° C. or higher.
  • the dissolution removal treatment improves the dissolution efficiency by immersing the mesh body 9 in water and irradiating the mesh body 9 with ultrasonic waves, shaking, or stirring as necessary. You may perform such a process.
  • auxiliary wire 2 when the auxiliary wire 2 is a fiber containing an alkali-decomposable resin such as polyester, a method of dissolving and removing the auxiliary wire 2 by immersing the net 9 in an alkaline aqueous solution, particularly preferably a hot alkaline aqueous solution, can be mentioned. It is done.
  • auxiliary wire 2 when the auxiliary wire 2 is a fiber such as an acrylic fiber that is burned down by burning, a method of heat-treating the mesh body 9 in a heating furnace or the like so that only the auxiliary wire 2 is burned off can be mentioned. .
  • the metal wire 1 as shown in FIG. A cylindrical metal net 10 having a knitted net structure is formed.
  • the load and frictional force applied to the metal wire 1 in the knitting process are distributed to the auxiliary wire 2, so that the knitting is performed while suppressing the cutting of the metal wire 1. It can be performed.
  • the metal net 10 made of the knitted metal wire 1 can be stably obtained. It is done.
  • the metal mesh can be stably produced with high productivity while suppressing the cutting of the metal wire even when a metal wire that is easily cut or a metal wire having a thin wire diameter is used. Can be manufactured.
  • the mesh opening is not particularly limited, but the effect of the present invention is particularly remarkable when a metal mesh with a small opening such as 2 to 6 mm in the vertical direction and 1 to 5 mm in the horizontal direction is produced. .
  • a metal net having a knitted loop loop length of 2 to 6 mm and a width of 1 to 5 mm was obtained.
  • network of 2nd embodiment is a metal net manufacturing method of 1st embodiment.
  • a cylindrical net 19 is formed using a coated metal wire 11 formed by covering the surface of the wire 1 with an auxiliary material 12 that can be selectively removed.
  • symbol shown in 1st embodiment shows a similar element.
  • FIG. 5 illustrates a state in which a cylindrical net 19 made of the coated metal wire 11 formed by coating the metal wire 1 with the selectively removable auxiliary material 12 is knitted using the circular knitting machine 110. It is a schematic explanatory drawing for doing.
  • the coated metal wire 11 is formed by covering the metal wire 1 with the auxiliary material 12.
  • the circular knitting machine 110 is the same as the circular knitting machine 100 of the first embodiment. Instead of bundling the metal wire 1 and the auxiliary wire 2 with the guide 3 and sending them to the yarn path strut 4, the coated metal wire 11 is applied to the yarn path strut 4.
  • the configuration is the same as that of the circular knitting machine 100 except that a configuration for direct feeding is adopted.
  • the covered metal wire 11 is taken up by the rotating yarn path support 4. Then, a continuous loop-like stitch is formed in the same manner as in the first embodiment. Then, the coated metal wire 11 is knitted in the same manner as in the first embodiment. By such a process, a net 19 knitted with the coated metal wire 11 as shown in FIG. 6 is formed.
  • the coated metal wire 11 is a dissimilar material formed by coating the periphery of the metal wire 1 with an auxiliary material 12 that can be selectively removed as shown in the enlarged schematic view of FIG.
  • This is a composite wire.
  • the metal wire 1 used for forming the coated metal wire 11 include those described in the first embodiment.
  • the auxiliary material 12 a material that can be selectively removed while leaving the metal wire 1 by means of dissolution, decomposition, combustion, and the like in a later-described step after knitting is used without particular limitation.
  • Such materials include, for example, water-soluble resins such as water-soluble polyvinyl alcohol as described above, and organic solvent solubility that can be easily dissolved in organic solvents such as polyvinyl chloride and uncrosslinked acrylic resins. Examples thereof include resins and various waxes that can be easily melted and removed by heating.
  • the auxiliary material 12 is selectively removed from the net 19 formed by knitting as described above.
  • This step is performed by appropriately selecting a method capable of selectively removing only the auxiliary material 12 without removing the metal wire 1 according to the type of the auxiliary material 12.
  • a method of treating the net 19 with a liquid that dissolves or decomposes the auxiliary material 12 can be mentioned.
  • auxiliary material 12 is water-soluble polyvinyl alcohol
  • a method of dissolving and removing the auxiliary material 12 by immersing the net 19 in water, preferably hot water can be mentioned.
  • the water temperature and treatment time are appropriately selected according to the dissolution rate and solubility of the water-soluble polyvinyl alcohol.
  • hot water it is preferable to use hot water of 50 ° C. or higher, more preferably 70 ° C. or higher, particularly 90 ° C. or higher.
  • the dissolution removal treatment improves the dissolution efficiency by immersing the mesh body 9 in water and irradiating the mesh body 9 with ultrasonic waves, shaking, or stirring as necessary. You may perform such a process.
  • the auxiliary material 12 is an organic solvent-soluble resin that can be easily dissolved in an organic solvent such as polyvinyl chloride or an uncrosslinked acrylic resin
  • the auxiliary material 12 is obtained by immersing the net 19 in the organic solvent. Is a method of dissolving and removing the above.
  • the auxiliary material 12 is a wax or the like that is melted and removed by heating
  • the auxiliary material 12 is selectively removed from the mesh body 19 as shown in FIG. 6 to form a metal net 20 as shown in FIG. Is done.
  • a load such as a tension applied to the metal wire 1 in the knitting process is distributed to the auxiliary material 12, so that the knitting is performed while suppressing the cutting of the metal wire 1. It can be performed.
  • the metal net 20 made of the knitted metal wire 1 is obtained.
  • Comparative Example 2 A titanium net was produced in the same manner as in Comparative Example 1 except that the knitting was performed at an extremely slow knitting speed such as 4.0 seconds / rotation which was not industrially practical instead of knitting at 1.5 seconds / rotation. .
  • an extremely slow knitting speed such as 4.0 seconds / rotation which was not industrially practical instead of knitting at 1.5 seconds / rotation.
  • cutting of the titanium wire was suppressed and some metal nets were formed.
  • the knitting was stopped.
  • an average of 10 or more cut portions of titanium wire per 100 cm 2 was observed.
  • the present invention provides a titanium mesh used as a medical material, a wire mesh for producing a shock absorber disposed around an exhaust pipe compressed and connected to an engine, and a sealing body for a spherical joint. It can be applied to the production of wire meshes and wire meshes used in the production of automobile airbag inflators.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Of Fabric (AREA)
  • Filtering Materials (AREA)

Abstract

The present invention relates to a method for manufacturing a metal net, the method comprising the following: a step for forming a net body, that is a composite of a metal wire and an auxiliary wire, by plain-knitting the metal wire and the auxiliary wire that is formed along the metal wire and made from a material such as water-soluble polyvinyl alcohol which can be removed selectively; and a step for selectively removing the auxiliary wire from the net body.

Description

金属網の製造方法及び金属網Metal mesh manufacturing method and metal mesh
　本発明は、金属線材をメリヤス編みして得られる金属網の製造方法及び金属網に関する。 The present invention relates to a method for producing a metal mesh obtained by knit knitting a metal wire and a metal mesh.
　従来、金属線材をメリヤス編みして形成される金属網、またはワイヤーメッシュとも称される製品が知られている。金属網の製造に用いられる金属線材としては、例えば、ステンレス鋼線、鉄線、銅－ニッケル合金（白銅），銅－ニッケル－亜鉛合金（洋白），黄銅，ベリリウム銅等の銅合金からなる金属線材；インコネル（登録商標）等のニッケル系金属からなる金属線材；チタニウムやチタニウム合金等のチタニウム系金属からなる金属線材、アルミニウムやアルミニウム合金からなる金属線材等が挙げられる。 Conventionally, a product called a metal mesh formed by knitting a metal wire or a wire mesh is known. Examples of metal wires used in the production of metal mesh include metals made of copper alloys such as stainless steel wires, iron wires, copper-nickel alloys (white copper), copper-nickel-zinc alloys (white), brass, and beryllium copper. Wire material; Metal wire material made of nickel metal such as Inconel (registered trademark); Metal wire material made of titanium metal such as titanium or titanium alloy; Metal wire material made of aluminum or aluminum alloy.
　このような金属網は、その金属本来の特徴と併せて、その柔軟性、伸縮性、クッション性、濾過性等の要素を活かして幅広い用途に用いられている。具体的には、例えば、エンジンに接続された排気管周りに配設される緩衝材として圧縮されて用いられたり、下記特許文献１に示すような、エンジンに接続された排気管の球面継手のシール体を製造するために圧縮されて用いられたり、下記特許文献２に示すような、自動車のエアバックのインフレータを製造するために圧縮されて用いられたりするような用途が知られている。 Such metal nets are used in a wide range of applications by taking advantage of elements such as flexibility, stretchability, cushioning properties, and filterability in addition to the original characteristics of the metal. Specifically, for example, it is used by being compressed as a buffer material disposed around an exhaust pipe connected to the engine, or a spherical joint of an exhaust pipe connected to the engine as shown in Patent Document 1 below. There are known uses in which the seal body is compressed to be used for manufacturing, or compressed and used to manufacture an inflator for an automobile airbag as shown in Patent Document 2 below.
　また、例えば、下記特許文献３は、例えば図１１に示すような、チタニウム製線材をメリヤス編みして形成された円筒状の金属網状体を所定の形状に成形し、成形された金属網状体をプレスして得られる細胞誘導材料を開示する。そして、このような細胞誘導材料によれば、メリヤス編みされたチタニウム製線材の空隙に細胞が形成されるために、生体との一体性に優れた材料が得られ、人工歯根、人工関節、骨補填、皮膚端子等の医療材料として用いられることが開示されている。 Further, for example, in Patent Document 3 below, for example, as shown in FIG. 11, a cylindrical metal net formed by knitting a titanium wire is formed into a predetermined shape, and the formed metal net is obtained. Disclosed is a cell-inducing material obtained by pressing. According to such a cell-inducing material, since cells are formed in the voids of the knitted titanium wire, a material excellent in integration with a living body can be obtained, and an artificial tooth root, an artificial joint, a bone It is disclosed that it can be used as a medical material for filling, skin terminals and the like.
ＷＯ２００７／０１８１７３号パンフレットWO2007 / 018173 pamphlet 特開平１１－１９７４２２号公報JP-A-11-197422 特開２０１１－２２９７６１号公報JP 2011-229761 A
　従来、広く用いられている、ステンレス鋼線、鉄線、銅合金等からなる比較的粘りの強い金属線材を用いてメリヤス編みの工程により金属網を形成する場合、線径の細い金属線材を用いた場合であっても生産性良く安定的に金属網を形成することができていた。一方、例えば、チタニウム系線材やアルミニウム系線材のような比較的硬い金属線材や、線径の細い金属線材を用いて金属網を形成しようとした場合、例えば、図９で示すように、網構造を形成できなかったり、図１０で示すように、金属線材が切断してループが形成されない部分ができてしまったりすることがあった。このような問題は、編成速度を低下させることにより、多少改善される場合もあるが、編成速度を低下させることは工業的な生産の観点から好ましくなく、また、金属線材の種類によっては編成速度を著しく低下させても殆ど問題が改善されないこともあった。 Conventionally, when forming a metal net by a knit process using a relatively tenacious metal wire made of stainless steel wire, iron wire, copper alloy, etc., a metal wire with a thin wire diameter was used. Even in this case, the metal net could be stably formed with good productivity. On the other hand, for example, when a metal net is formed using a relatively hard metal wire such as a titanium-based wire or an aluminum-based wire, or a metal wire having a small wire diameter, for example, as shown in FIG. 10 could not be formed, or as shown in FIG. 10, the metal wire was cut and a portion where no loop was formed was sometimes formed. Such problems may be somewhat improved by lowering the knitting speed, but lowering the knitting speed is not preferable from the viewpoint of industrial production, and depending on the type of metal wire, the knitting speed In some cases, the problem is hardly improved even if the value is significantly reduced.
　本発明は、上述したような問題、すなわち、切れやすい金属線材や線径の細い金属線材を用いた場合であっても、金属網を安定的に製造できる方法を提供することを目的とする。 The object of the present invention is to provide a method capable of stably producing a metal net even when the above-described problem, that is, a metal wire that is easily cut or a metal wire having a thin wire diameter is used.
　金属線材をメリヤス編みして金属網を形成する場合、編成動作においてループを形成する際に金属線材に高いテンションが掛かる。例えば、金属線材のメリヤス編みの工程においては、予め形成されたループに新たなループを形成させてくぐらせるために、図１２に示すように、フック５ａを有する編み針５で金属線材１を捕捉した後、折り曲げてループを形成させるような工程がある。このような工程においては、金属線材１は、編み針５のフック５ａに引っ張られることにより、高いテンションを受ける。本発明者らは、上述したような金属線材の切断は、このようなメリヤス編みの工程において、金属線材に高いテンションが掛かったり、金属線材１とフック５ａとの金属表面同士が摩擦したり、金属線材１がフック５ａに捕捉されて折り曲げられる際に急激な曲げによる応力の集中等を受けること等を原因とするのではないかと考えた。そして、メリヤス編みの際に金属線材に掛かる負担を低減させることにより、金属線材の切断が抑制されるのではないかと考え、鋭意検討することにより本発明に想到するに至った。 When forming a metal net by knitting a metal wire, a high tension is applied to the metal wire when forming a loop in the knitting operation. For example, in the knitting process of the metal wire, the metal wire 1 is captured by the knitting needle 5 having the hook 5a, as shown in FIG. 12, in order to form a new loop in the previously formed loop. Thereafter, there is a step of forming a loop by bending. In such a process, the metal wire 1 receives a high tension by being pulled by the hook 5 a of the knitting needle 5. The inventors cut the metal wire as described above, in such a knitting process, a high tension is applied to the metal wire, the metal surfaces of the metal wire 1 and the hook 5a are rubbed with each other, It was thought that it might be caused by stress concentration due to sudden bending when the metal wire 1 was caught by the hook 5a and bent. The inventors of the present invention have come up with the present invention by studying earnestly that the cutting of the metal wire may be suppressed by reducing the burden on the metal wire during knitting.
　すなわち、本発明の一局面は、金属線材と、該金属線材に沿わせた選択的に除去可能な材料からなる補助線材と、をメリヤス編みすることにより網体を形成する工程と、網体から補助線材を選択的に除去する工程と、を備える金属網の製造方法である。このような金属網の製造方法によれば、金属線材に後に除去される補助線材を沿わせていることにより、メリヤス編みする際のループを形成する工程等において金属線材に掛かる負担を低減させることができる。その結果、切れやすい金属材料からなる線材や線径の細い線材を用いても、金属線材が切れることを抑制できる。そして、メリヤス編みの後、補助線材を除去することにより、切れやすい金属線材や線径の細い金属線材を用いた場合であっても、高い生産性を維持しながら金属網を安定的に生産することができる。また、副次的な効果としては編み針と金属線材との金属表面同士の摩擦が低減されることにより、編み針の摩耗が抑制され、その結果、編み針の寿命も長くなるという効果もある。 That is, one aspect of the present invention is a method of forming a mesh body by knitting a metal wire and an auxiliary wire made of a selectively removable material along the metal wire, And a step of selectively removing the auxiliary wire. According to such a method of manufacturing a metal net, by placing an auxiliary wire to be removed later on the metal wire, the burden on the metal wire can be reduced in the process of forming a loop when knitting the knit. Can do. As a result, even when a wire made of a metal material that is easily cut or a wire with a thin wire diameter is used, the metal wire can be prevented from being cut. Then, after the knitting, the auxiliary wire is removed to stably produce a metal net while maintaining high productivity even when a metal wire that is easily cut or a metal wire with a thin wire diameter is used. be able to. Further, as a secondary effect, the friction between the metal surfaces of the knitting needle and the metal wire is reduced, so that wear of the knitting needle is suppressed, and as a result, the life of the knitting needle is prolonged.
　上記補助線材を選択的に除去する工程は、金属線材を除去せずに補助線材のみを選択的に溶解又は分解する処理液により、補助線材を除去する工程であることが好ましい。具体的には、例えば、水溶性ポリビニルアルコール等の水溶性樹脂の繊維を補助線材として用い、このような水溶性樹脂の繊維を、水、好ましくは熱水を用いて選択的に溶解除去するような方法が好ましい。または、補助線材としてポリエステル等のアルカリ分解性の繊維を用い、このようなアルカリ分解性の繊維をアルカリ性水溶液中で処理することにより選択的に分解除去するような方法も好ましい。さらには、所定の有機溶剤に溶解する繊維を補助線材として用い、このような繊維を有機溶剤に溶解させることにより除去するような方法であってもよい。 The step of selectively removing the auxiliary wire is preferably a step of removing the auxiliary wire with a treatment liquid that selectively dissolves or decomposes only the auxiliary wire without removing the metal wire. Specifically, for example, water-soluble resin fibers such as water-soluble polyvinyl alcohol are used as auxiliary wires, and such water-soluble resin fibers are selectively dissolved and removed using water, preferably hot water. Is preferred. Alternatively, a method in which an alkali-degradable fiber such as polyester is used as the auxiliary wire and the alkali-degradable fiber is selectively decomposed and removed by treatment in an alkaline aqueous solution is also preferable. Furthermore, a method may be used in which fibers dissolved in a predetermined organic solvent are used as auxiliary wires, and such fibers are removed by dissolving in an organic solvent.
　また、上記補助線材を選択的に除去する工程の別の例としては、補助線材である繊維を燃焼させて焼失させることにより補助線材のみを除去する方法も挙げられる。 Further, as another example of the step of selectively removing the auxiliary wire, there is a method of removing only the auxiliary wire by burning and burning the fibers as the auxiliary wire.
　上述したような金属網の製造方法は、チタニウム系線材やアルミニウム系線材のような切れやすい金属線材を用いる場合に、とくに優れた効果を発揮する。 The method for producing a metal net as described above exhibits particularly excellent effects when using a metal wire that is easily cut, such as a titanium wire or an aluminum wire.
　また、補助線材がマルチフィラメントまたはヤーンと呼ばれるような複数のモノフィラメントを含む繊維である場合には、メリヤス編み工程においてマルチフィラメントが解きほぐされて、モノフィラメントが金属線材の周囲を偏りなく覆うように配されるようになる。この場合には、金属線材の周囲が保護されることにより、摩擦による影響がさらに抑制されるとともに、モノフィラメント化して細線化することにより除去効率が向上する点から好ましい。 In addition, when the auxiliary wire is a fiber including a plurality of monofilaments called multifilament or yarn, the multifilament is unraveled in the knitting process, and the monofilament is arranged so as to cover the periphery of the metal wire evenly. Will come to be. In this case, it is preferable in that the periphery of the metal wire is protected to further suppress the influence of friction, and the removal efficiency is improved by making the filament into a monofilament.
　また、補助線材の引張破断強度が金属線材の引張破断強度よりも高い場合には、メリヤス編みの工程において、テンションを補助線材に充分に分散させることにより、金属線材に掛かるテンションを低減することができ、その結果、金属線材の切断を抑制することができる。 Further, when the tensile breaking strength of the auxiliary wire is higher than the tensile breaking strength of the metal wire, the tension applied to the metal wire can be reduced by sufficiently dispersing the tension in the auxiliary wire in the knitting process. As a result, cutting of the metal wire can be suppressed.
　また、本発明の他の一局面は、選択的に除去可能な補助材料で少なくとも外周の一部分が被覆された被覆金属線材をメリヤス編みすることにより網体を形成する工程と、網体から補助材料を選択的に除去する工程と、を備える金属網の製造方法である。 Another aspect of the present invention is a method of forming a mesh body by knitting a coated metal wire having at least a part of the outer periphery covered with an auxiliary material that can be selectively removed, and an auxiliary material from the mesh body. And a step of selectively removing the metal net.
　また、上述したような金属網の製造方法によれば、従来の技術では得られなかった、チタニウム系線材又はアルミニウム系線材をメリヤス編みして得られた金属網であって、線材の直径は４０～２００μｍであり、メリヤス編みの縦目２～６ｍｍ、横目１～５ｍｍであり、１００ｃｍ2あたりの切断部の数が平均２個以下であるような金属網を得ることができる。 In addition, according to the method for manufacturing a metal mesh as described above, a metal mesh obtained by knitting a titanium wire or an aluminum wire that has not been obtained by the conventional technique, and the diameter of the wire is 40. It is possible to obtain a metal net having a diameter of 2 to 6 mm and a width of 1 to 5 mm and a mean number of cut parts per 100 cm 2 is 2 or less.
　本発明の金属網の製造方法によれば、切れやすい金属線材や、線径の細い金属線材を用いた場合であっても、金属網を安定的に生産することができる。 According to the method for producing a metal net of the present invention, a metal net can be stably produced even when a metal wire that is easily cut or a metal wire having a thin wire diameter is used.
図１は第一実施形態における、筒状の網を編む丸編機１００によるメリヤス編みを説明する説明図である。FIG. 1 is an explanatory view for explaining knitting by a circular knitting machine 100 for knitting a cylindrical net in the first embodiment. 図２は金属線材１と補助線材２とが重ねられて編み込まれた網体９の編み目を示す部分拡大模式図である。FIG. 2 is a partially enlarged schematic view showing the stitches of the net body 9 in which the metal wire 1 and the auxiliary wire 2 are overlapped and knitted. 図３は金属線材１の周囲にマルチフィラメントである補助線材２が解きほぐれてモノフィラメント２ａが配されたときの様子を示す模式図である。FIG. 3 is a schematic diagram showing a state in which the monofilament 2a is arranged by unraveling the auxiliary wire 2 which is a multifilament around the metal wire 1. 図４は補助線材２を除去して得られた金属網１０の編み目を示す部分拡大模式図である。FIG. 4 is a partially enlarged schematic view showing the stitches of the metal net 10 obtained by removing the auxiliary wire 2. 図５は第二実施形態における、筒状の網を編む丸編機１１０によるメリヤス編みを説明する説明図である。FIG. 5 is an explanatory diagram for explaining knitting by the circular knitting machine 110 for knitting a cylindrical net in the second embodiment. 図６は被覆金属線材１１を編んで形成した網１９の編み目を示す部分拡大模式図である。FIG. 6 is a partially enlarged schematic view showing the stitches of the net 19 formed by knitting the coated metal wire 11. 図７は補助材料１２を除去して得られた金属網２０の編み目を示す部分拡大模式図である。FIG. 7 is a partially enlarged schematic view showing the stitches of the metal net 20 obtained by removing the auxiliary material 12. 図８は実施例で得られたチタニウム線材の金属網の写真である。FIG. 8 is a photograph of the metal mesh of the titanium wire obtained in the example. 図９は比較例１で得られたチタニウム線材の金属網の写真である。FIG. 9 is a photograph of the metal mesh of the titanium wire obtained in Comparative Example 1. 図１０は比較例２で得られたチタニウム線材の金属網の写真である。FIG. 10 is a photograph of the metal mesh of the titanium wire obtained in Comparative Example 2. 図１１は金属線材を筒状にメリヤス編みして形成された金属網の模式図である。FIG. 11 is a schematic view of a metal net formed by knitting a metal wire into a cylindrical shape. 図１２はメリヤス編みの工程において、編み針５のフック５ａが金属線材１を捕捉するときの様子を説明するための説明図である。FIG. 12 is an explanatory diagram for explaining a state in which the hook 5a of the knitting needle 5 captures the metal wire 1 in the knitting process.
　［第一実施形態］
　本発明に係る金属網の製造方法の一実施形態を図面を参照しながら説明する。なお、本実施形態の金属網の製造方法としては、その代表例として丸編機を用いる場合について詳しく説明する。なお、本発明は丸編機を用いる場合に限られず、たて編機やよこ編機を用いたり、手編み方法のような、編み針を用いて金属線材のループを形成し、予め形成されているループにくぐらせて次の編み目を形成することを繰り返して網を編むような編み方であれば、編み方は特に限定されない。 [First embodiment]
An embodiment of a metal net manufacturing method according to the present invention will be described with reference to the drawings. As a representative example of the method for manufacturing a metal net of this embodiment, a case where a circular knitting machine is used will be described in detail. The present invention is not limited to the case of using a circular knitting machine, but a metal wire loop is formed in advance using a knitting needle, such as a vertical knitting machine or a weft knitting machine, or a hand knitting method. The method of knitting is not particularly limited as long as the net is knitted by repeating the formation of the next stitch through the loop.
　図１は、丸編機１００を用いて、金属線材１に、選択的に除去可能な材料からなる補助線材２を沿わせて筒状の網体９を編むときの様子を説明ための模式図である。丸編機１００は、金属線材１と補助線材２とを束ねるためのガイド３、金属線材１と補助線材２との束を引き取りながら回転軸を中心として回転する糸道支柱４、編み針５、複数本の編み針５を円周に沿って略等間隔で取り付ける円筒状の編み針取付台６、回転軸を中心として回転することにより各編み針５の下端を押して各編み針５を上昇運動または下降運動させるカム７、図略のモータにより回転軸を中心として一方向に回転する円形の回転台８を備える。糸道支柱４及びカム７は回転台８に支持されており、回転台８の回転軸を中心として、回転台８と同期して回転する。また、図１に拡大図として示したように、編み針５はその先端に、金属線材１を捕捉するためのフック５ａと、金属線材を離脱させるための、べら５ｂとを有する。 FIG. 1 is a schematic diagram for explaining a state in which a cylindrical net body 9 is knitted using a circular knitting machine 100 along with an auxiliary wire 2 made of a selectively removable material on a metal wire 1. It is. The circular knitting machine 100 includes a guide 3 for bundling the metal wire 1 and the auxiliary wire 2, a yarn path support 4, a knitting needle 5, and the like that rotate around the rotation axis while taking a bundle of the metal wire 1 and the auxiliary wire 2. A cylindrical knitting needle mount 6 for attaching book knitting needles 5 at substantially equal intervals along the circumference, and a cam for rotating each knitting needle 5 up or down by pushing the lower end of each knitting needle 5 by rotating around a rotation axis. 7. A circular turntable 8 that rotates in one direction around the rotation axis by a motor (not shown) is provided. The yarn guide column 4 and the cam 7 are supported by a turntable 8 and rotate around the rotation axis of the turntable 8 in synchronization with the turntable 8. As shown in an enlarged view in FIG. 1, the knitting needle 5 has a hook 5a for capturing the metal wire 1 and a latch 5b for separating the metal wire at the tip thereof.
　本実施形態においては、糸道支柱４及びカム７は回転台８に支持されて一方向に同期して回転している。メリヤス編みの工程においては、はじめに、ガイド３で束ねられた金属線材１及び補助線材２を、糸道支柱４が回転しながら連続して引き取る。そして、編み針取付台６に取り付けられた各編み針５はカム７により下端を押されてそれぞれ一定の周期で上昇運動または下降運動を繰り返す。そして上昇した編み針５は、束ねられた金属線材１と補助線材２とをフック５ａで捕捉する。フック５ａで捕捉された金属線材１と補助線材２は、下降する編み針５の動作により、ループを形成するように曲げられる。そして、形成されたループは、予め形成されている前ループにくぐらされ、その後、上昇する編み針５の動作によりべら５ｂを開放し、ループを編み針５から離脱させる。このような動作を繰り返すことにより、連続するループ状の編み目を形成していく。このようにして金属網が形成されていく。形成された金属網９は、図１の下矢印で示す方向に引きとられる。このような工程により、図２に示すような、金属線材１と補助線材とが重ねられて編み込まれたような網構造を有する筒状の金属網９が形成される。 In the present embodiment, the yarn path support 4 and the cam 7 are supported by the turntable 8 and are rotated in synchronization with one direction. In the knitting process, first, the metal wire 1 and the auxiliary wire 2 bundled by the guide 3 are continuously drawn while the yarn path support 4 rotates. Then, each knitting needle 5 attached to the knitting needle mounting base 6 is pushed at the lower end by the cam 7 and repeats an ascending motion or a descending motion at a constant cycle. The raised knitting needle 5 captures the bundled metal wire 1 and auxiliary wire 2 with the hook 5a. The metal wire 1 and the auxiliary wire 2 captured by the hook 5a are bent so as to form a loop by the operation of the descending knitting needle 5. Then, the formed loop is passed through a previously formed front loop, and then the latch 5b is opened by the operation of the rising knitting needle 5 so that the loop is detached from the knitting needle 5. By repeating such an operation, continuous loop stitches are formed. Thus, a metal net is formed. The formed metal net 9 is pulled in the direction indicated by the down arrow in FIG. By such a process, a cylindrical metal net 9 having a net structure in which the metal wire 1 and the auxiliary wire are overlapped and knitted as shown in FIG. 2 is formed.
　金属線材１の種類は特に限定されない。その具体例としては、例えば、チタニウム（titanium）又はチタニウム合金（titanium alloy）からなるチタニウム系線材；アルミニウム又はアルミニウム合金からなるアルミニウム系線材；ステンレス鋼線；鉄線；銅－ニッケル合金（白銅），銅－ニッケル－亜鉛合金（洋白），黄銅，ベリリウム銅等の銅合金の線材；インコネル合金（inconel alloy）（登録商標）等のニッケル系金属の線材等の金属線材が挙げられる。また、金属線材の線径は特に限定されないが、例えば、線径１０～１０００μｍ、さらには４０～６００μｍ、とくには、５０～２００μｍの線材が好ましく用いられる。これらの中では、５０～２００μｍの線径のチタニウム系線材やアルミニウム系線材を用いる場合に、本発明の効果が特に顕著に奏される。 The type of the metal wire 1 is not particularly limited. Specific examples thereof include, for example, a titanium-based wire made of titanium or a titanium alloy; an aluminum-based wire made of aluminum or an aluminum alloy; a stainless steel wire; an iron wire; a copper-nickel alloy (white copper), a copper -Wires of copper alloys such as nickel-zinc alloy (white), brass, beryllium copper; metal wires such as nickel-based metal wires such as inconel alloy (registered trademark). The wire diameter of the metal wire is not particularly limited. For example, a wire having a wire diameter of 10 to 1000 μm, more preferably 40 to 600 μm, particularly 50 to 200 μm is preferably used. Among these, the effects of the present invention are particularly prominent when a titanium-based wire or an aluminum-based wire having a wire diameter of 50 to 200 μm is used.
　一方、補助線材２としては、メリヤス編みの後、後述する補助線材を除去する工程で、溶解、分解、燃焼等の手段により、金属線材１を残したまま選択的に除去できる線材であれば特に限定なく用いられる。このような補助線材の具体例としては、例えば、水、好ましくは熱水で除去可能な水溶性ポリビニルアルコール等の水溶性樹脂の繊維や、アルカリ性水溶液中で分解可能なポリエチレンテレフタレート繊維のようなポリエステル繊維等のアルカリ分解性樹脂の繊維や、所定の有機溶剤に溶解する各種樹脂を含む繊維や、燃焼させることにより焼失するアクリル繊維等の合成繊維や天然繊維が挙げられる。これらの中では、熱水中で容易に除去できる点から、水溶性ポリビニルアルコール等の水溶性樹脂の繊維を用いることが特に好ましい。水溶性ポリビニルアルコールの繊維としては、例えば、（株）ニチビ製の商品名ソルブロンや、（株）クラレ製の商品名ミントバール等が挙げられる。なお、補助線材は単糸の繊維からなるストランド状のものであっても、複数のモノフィラメントを撚糸して複合化させたマルチフィラメント又はヤーンと称されるようなものであってもよい。 On the other hand, the auxiliary wire 2 is a wire that can be selectively removed while leaving the metal wire 1 by means of dissolution, decomposition, combustion, etc. in the step of removing the auxiliary wire described later after knitting. Used without limitation. Specific examples of such auxiliary wires include, for example, water-soluble resin fibers such as water-soluble polyvinyl alcohol that can be removed with water, preferably hot water, and polyesters such as polyethylene terephthalate fibers that can be decomposed in an alkaline aqueous solution. Examples thereof include fibers of alkali-degradable resins such as fibers, fibers containing various resins that are dissolved in a predetermined organic solvent, and synthetic fibers and natural fibers such as acrylic fibers that are burned off by burning. Among these, it is particularly preferable to use a fiber of a water-soluble resin such as water-soluble polyvinyl alcohol because it can be easily removed in hot water. Examples of the water-soluble polyvinyl alcohol fiber include trade name SOLBRON manufactured by Nichibi Corporation, and trade name mint bar manufactured by Kuraray Co., Ltd. The auxiliary wire may be in the form of a strand made of single yarn fibers, or may be called a multifilament or yarn obtained by twisting a plurality of monofilaments into a composite.
　なお、マルチフィラメントまたはヤーンからなる補助線材２を用いた場合には、図３に示したように、メリヤス編みの工程においてマルチフィラメントが解きほぐされて形成されたモノフィラメント２ａが金属線材１の周囲に万遍なく配分されるような形態で編み込まれることがある。とくに、丸編機を用いた場合には、メリヤス編みの工程においてマルチフィラメントが回転運動によりねじられるために、解きほぐされやすくなる。このような場合には、金属線材の広い面積がモノフィラメントにより保護されることにより、編み針との摩擦による負担がさらに低減される。また、後述する補助線材の選択的除去の効率が向上する点から好ましい。例えば、補助線材が溶剤に溶解されたり分解剤で分解されて除去されるような場合には、メリヤス編みの工程においてモノフィラメントに解きほぐされることにより、溶剤や分解剤との接触面積が大きくなることにより溶解速度や分解速度が向上する。 When the auxiliary wire 2 made of multifilament or yarn is used, the monofilament 2a formed by unraveling the multifilament in the knitting process is formed around the metal wire 1 as shown in FIG. It may be knitted in a form that is uniformly distributed. In particular, when a circular knitting machine is used, the multifilament is twisted by the rotary motion in the knit knitting process, so that it is easily unraveled. In such a case, the burden due to friction with the knitting needle is further reduced by protecting a large area of the metal wire by the monofilament. Moreover, it is preferable from the point which the efficiency of the selective removal of the auxiliary wire mentioned later improves. For example, when the auxiliary wire is dissolved in a solvent or decomposed and removed with a decomposing agent, the contact area with the solvent or decomposing agent is increased by unraveling into monofilaments in the knitting process. This improves the dissolution rate and decomposition rate.
　補助線材の線径は特に限定されない。具体的には、例えば、繊度が３０～１０００ｄｔｅｘ、さらには、１００～７００ｄｔｅｘの線材が好ましく用いられる。また、マルチフィラメントやヤーンを用いる場合には、モノフィラメントの本数（Ｆ）としては、例えば、９～２００Ｆ、さらには５０～２００Ｆの線材が好ましく用いられる。さらに、モノフィラメントの本数Ｆに対する繊度（ｄｔｅｘ／Ｆ（フィラメント数））としては、３１ｄｔｅｘ／９Ｆ～６６０ｄｔｅｘ／２００Ｆのような線材が好ましく用いられる。 The wire diameter of the auxiliary wire is not particularly limited. Specifically, for example, a wire having a fineness of 30 to 1000 dtex, more preferably 100 to 700 dtex is preferably used. When multifilaments or yarns are used, the number of monofilaments (F) is preferably 9 to 200F, more preferably 50 to 200F, for example. Further, as the fineness (dtex / F (number of filaments)) with respect to the number F of monofilaments, a wire material such as 31 dtex / 9F to 660 dtex / 200F is preferably used.
　また、補助線材の引張破断強度としては、金属線材の引張破断強度よりも高いこと、具体的には、１．１倍以上、さらには１．５倍以上、とくには２倍以上であることが好ましい。このような場合には、メリヤス編みの工程において掛かるテンションが補助線材に分散されることにより、金属線材に掛かるにテンションを低減することができ。その結果、金属線材の切断がより充分に抑制される。 Further, the tensile breaking strength of the auxiliary wire is higher than the tensile breaking strength of the metal wire, specifically, 1.1 times or more, further 1.5 times or more, particularly 2 times or more. preferable. In such a case, the tension applied to the metal wire can be reduced by dispersing the tension applied in the knitting process in the auxiliary wire. As a result, cutting of the metal wire is more sufficiently suppressed.
　次に、上述のようにしてメリヤス編みされて得られた、図２に示したような網体９から、補助線材２を選択的に除去する工程について説明する。本工程は、補助線材２の種類に応じて、金属線材１を除去せずに補助線材２のみを選択的に除去できる方法が適宜選択されて実施される。例えば、補助線材２が所定の液で溶解または分解される線材である場合、補助線材２を溶解または分解する液に網体９を浸漬処理するような方法が挙げられる。 Next, a process of selectively removing the auxiliary wire 2 from the net 9 shown in FIG. 2 obtained by knitting as described above will be described. This step is performed by appropriately selecting a method capable of selectively removing only the auxiliary wire 2 without removing the metal wire 1 according to the type of the auxiliary wire 2. For example, when the auxiliary wire 2 is a wire that is dissolved or decomposed with a predetermined liquid, a method of immersing the net 9 in a solution that dissolves or decomposes the auxiliary wire 2 can be used.
　例えば、補助線材２が水溶性ポリビニルアルコールの繊維である場合、網体９を水、好ましくは熱水に浸漬することにより補助線材２を溶解除去する方法が挙げられる。水温や処理時間は水溶性ポリビニルアルコールの溶解速度や溶解性に応じて適宜選択されるが、例えば、５０℃以上、さらには７０℃以上、とくには９０℃以上の熱水を用いることが好ましい。また、溶解除去の処理は、網体９を水に浸漬し、必要に応じて、網体９に超音波を照射したり、振盪したり、撹拌したりすること等により、溶解効率を向上させるような処理を施してもよい。 For example, when the auxiliary wire 2 is a fiber of water-soluble polyvinyl alcohol, a method of dissolving and removing the auxiliary wire 2 by immersing the net 9 in water, preferably hot water, can be mentioned. The water temperature and treatment time are appropriately selected according to the dissolution rate and solubility of the water-soluble polyvinyl alcohol. For example, it is preferable to use hot water of 50 ° C. or higher, more preferably 70 ° C. or higher, particularly 90 ° C. or higher. In addition, the dissolution removal treatment improves the dissolution efficiency by immersing the mesh body 9 in water and irradiating the mesh body 9 with ultrasonic waves, shaking, or stirring as necessary. You may perform such a process.
　また、例えば、補助線材２がポリエステル等のアルカリ分解性樹脂を含む繊維である場合、網体９をアルカリ性水溶液、特に好ましくは熱アルカリ性水溶液に浸漬することにより補助線材２を溶解除去する方法が挙げられる。さらに、補助線材２が燃焼させることにより焼失するアクリル繊維等の繊維である場合、網体９を加熱炉等に収容して補助線材２のみを焼失させるような条件で加熱処理する方法が挙げられる。 Further, for example, when the auxiliary wire 2 is a fiber containing an alkali-decomposable resin such as polyester, a method of dissolving and removing the auxiliary wire 2 by immersing the net 9 in an alkaline aqueous solution, particularly preferably a hot alkaline aqueous solution, can be mentioned. It is done. Furthermore, when the auxiliary wire 2 is a fiber such as an acrylic fiber that is burned down by burning, a method of heat-treating the mesh body 9 in a heating furnace or the like so that only the auxiliary wire 2 is burned off can be mentioned. .
　このような補助線材２を選択的に除去する工程により、図２に示したような網体９から補助線材２が選択的に除去された結果、図４に示したような金属線材１がメリヤス編みされた網構造を有する筒状の金属網１０が形成される。このような金属網の製造方法によれば、メリヤス編みの工程で金属線材１に付与される負荷や摩擦力が補助線材２に分散されるために、金属線材１の切断を抑制しながらメリヤス編みを行うことができる。そして、メリヤス編みされた金属線材１と補助線材２とを含む網体９から補助線材２のみを選択的に除去することにより、メリヤス編みされた金属線材１からなる金属網１０が安定的に得られる。 As a result of the selective removal of the auxiliary wire 2 from the net 9 as shown in FIG. 2, the metal wire 1 as shown in FIG. A cylindrical metal net 10 having a knitted net structure is formed. According to such a metal mesh manufacturing method, the load and frictional force applied to the metal wire 1 in the knitting process are distributed to the auxiliary wire 2, so that the knitting is performed while suppressing the cutting of the metal wire 1. It can be performed. Then, by selectively removing only the auxiliary wire 2 from the net 9 including the knitted metal wire 1 and the auxiliary wire 2, the metal net 10 made of the knitted metal wire 1 can be stably obtained. It is done.
　以上説明したような本実施形態の金属網の製造方法によれば、切れやすい金属線材や線径の細い金属線材を用いても、金属線材の切断を抑制しながら金属網を生産性良く安定的に製造することができる。網の目開きは特に限定されないが、例えば、縦目２～６ｍｍであり、横目１～５ｍｍのような目開きの小さな金属網を製造する場合に、本発明の効果は特に顕著に奏される。例えば、従来、金属線材として直径４０～２００μｍであるようなチタニウム系線材やアルミニウム系線材を用いて、メリヤス編みのループの縦目２～６ｍｍ、横目１～５ｍｍの金属網を得ようとした場合、編むことすら困難であるか、例えば、１００ｃｍ2あたり平均１０個以上の切断部が生じていたが、本実施形態の製造方法によれば、１００ｃｍ2あたり平均２個以下、さらには１個以下、好ましくはほぼ０個のようなチタニウム系線材やアルミニウム系線材の金属網が得られる。 According to the metal mesh manufacturing method of the present embodiment as described above, the metal mesh can be stably produced with high productivity while suppressing the cutting of the metal wire even when a metal wire that is easily cut or a metal wire having a thin wire diameter is used. Can be manufactured. The mesh opening is not particularly limited, but the effect of the present invention is particularly remarkable when a metal mesh with a small opening such as 2 to 6 mm in the vertical direction and 1 to 5 mm in the horizontal direction is produced. . For example, in the past, when using a titanium wire or aluminum wire having a diameter of 40 to 200 μm as a metal wire, a metal net having a knitted loop loop length of 2 to 6 mm and a width of 1 to 5 mm was obtained. Even if it is difficult to knit, for example, an average of 10 or more cut portions per 100 cm 2 was produced, but according to the manufacturing method of the present embodiment, an average of 2 or less, further 1 or less per 100 cm 2 A metal net of titanium-based wire or aluminum-based wire such as approximately zero is preferably obtained.
　［第二実施形態］
　次に上述した第一実施形態の金属網の製造方法の変形例である第二実施形態の金属網の製造方法について説明する。なお、第二実施形態の金属網の製造方法は、第一実施形態の金属網の製造方法において、金属線材１と補助線材２とを束ねて筒状の網体９を形成する代わりに、金属線材１の表面を選択的に除去可能な補助材料１２で被覆して形成された被覆金属線材１１を用いて筒状の網体１９を形成する方法である。なお、第一実施形態で示した符号と同じ符号で示した要素は、同様の要素を示す。 [Second Embodiment]
Next, a method for manufacturing a metal net according to a second embodiment, which is a modification of the method for manufacturing a metal net according to the first embodiment described above, will be described. In addition, the manufacturing method of the metal net | network of 2nd embodiment is a metal net manufacturing method of 1st embodiment. Instead of bundling the metal wire 1 and the auxiliary wire 2 and forming the cylindrical net | network body 9, it is metal In this method, a cylindrical net 19 is formed using a coated metal wire 11 formed by covering the surface of the wire 1 with an auxiliary material 12 that can be selectively removed. In addition, the element shown with the code | symbol same as the code | symbol shown in 1st embodiment shows a similar element.
　図５は、選択的に除去可能な補助材料１２で金属線材１を被覆して形成された被覆金属線材１１からなる筒状の網体１９を丸編機１１０を用いて編むときの様子を説明するための模式説明図である。被覆金属線材１１は金属線材１の周囲を補助材料１２で被覆して形成されている。丸編機１１０は、第一実施形態の丸編機１００において、金属線材１と補助線材２とをガイド３で束ねて糸道支柱４に送る代わりに、被覆金属線材１１を糸道支柱４に直接送るような構成を採用した以外は、丸編機１００と同様の構成を有する。 FIG. 5 illustrates a state in which a cylindrical net 19 made of the coated metal wire 11 formed by coating the metal wire 1 with the selectively removable auxiliary material 12 is knitted using the circular knitting machine 110. It is a schematic explanatory drawing for doing. The coated metal wire 11 is formed by covering the metal wire 1 with the auxiliary material 12. The circular knitting machine 110 is the same as the circular knitting machine 100 of the first embodiment. Instead of bundling the metal wire 1 and the auxiliary wire 2 with the guide 3 and sending them to the yarn path strut 4, the coated metal wire 11 is applied to the yarn path strut 4. The configuration is the same as that of the circular knitting machine 100 except that a configuration for direct feeding is adopted.
　本実施形態においては、被覆金属線材１１が回転している糸道支柱４に引き取られる。そして、第一実施形態と同様にして連続するループ状の編み目を形成する。そして、第一実施形態と同様にして被覆金属線材１１を編み上げていく。このような工程により、図６に示すような、被覆金属線材１１を編んだ網体１９が形成される。 In the present embodiment, the covered metal wire 11 is taken up by the rotating yarn path support 4. Then, a continuous loop-like stitch is formed in the same manner as in the first embodiment. Then, the coated metal wire 11 is knitted in the same manner as in the first embodiment. By such a process, a net 19 knitted with the coated metal wire 11 as shown in FIG. 6 is formed.
　ここで、被覆金属線材１１とは、図５中に拡大した断面の模式図を示したような、金属線材１の周囲を選択的に除去可能な補助材料１２で被覆して形成された異種材料の複合線材である。被覆金属線材１１の形成に用いられる金属線材１としては第一実施形態で説明したのと同様のものが挙げられる。また、補助材料１２としては、メリヤス編みの後、後述する工程で、溶解、分解、燃焼等の手段により、金属線材１を残したまま選択的に除去できる材料が特に限定なく用いられる。このような材料の具体例としては、例えば、上述したような水溶性ポリビニルアルコール等の水溶性樹脂や、ポリ塩化ビニルや未架橋アクリル樹脂のような有機溶媒に容易に溶解しうる有機溶媒溶解性樹脂や、加熱により容易に溶融除去することが可能な各種ワックス等が挙げられる。 Here, the coated metal wire 11 is a dissimilar material formed by coating the periphery of the metal wire 1 with an auxiliary material 12 that can be selectively removed as shown in the enlarged schematic view of FIG. This is a composite wire. Examples of the metal wire 1 used for forming the coated metal wire 11 include those described in the first embodiment. Further, as the auxiliary material 12, a material that can be selectively removed while leaving the metal wire 1 by means of dissolution, decomposition, combustion, and the like in a later-described step after knitting is used without particular limitation. Specific examples of such materials include, for example, water-soluble resins such as water-soluble polyvinyl alcohol as described above, and organic solvent solubility that can be easily dissolved in organic solvents such as polyvinyl chloride and uncrosslinked acrylic resins. Examples thereof include resins and various waxes that can be easily melted and removed by heating.
　次に、上述のようにしてメリヤス編みにより形成された網体１９から、補助材料１２を選択的に除去する。本工程は、補助材料１２の種類に応じて、金属線材１を除去せずに補助材料１２のみを選択的に除去できる方法が適宜選択されて行われる。例えば、補助材料１２が所定の液で溶解または分解される場合、補助材料１２を溶解または分解する液で網体１９を処理する方法が挙げられる。 Next, the auxiliary material 12 is selectively removed from the net 19 formed by knitting as described above. This step is performed by appropriately selecting a method capable of selectively removing only the auxiliary material 12 without removing the metal wire 1 according to the type of the auxiliary material 12. For example, when the auxiliary material 12 is dissolved or decomposed with a predetermined liquid, a method of treating the net 19 with a liquid that dissolves or decomposes the auxiliary material 12 can be mentioned.
　例えば、補助材料１２が水溶性ポリビニルアルコールである場合、網体１９を水、好ましくは熱水に浸漬することにより補助材料１２を溶解除去する方法が挙げられる。水温や処理時間は水溶性ポリビニルアルコールの溶解速度や溶解性に応じて適宜選択されるが、例えば、５０℃以上、さらには７０℃以上、とくには９０℃以上の熱水を用いることが好ましい。また、溶解除去の処理は、網体９を水に浸漬し、必要に応じて、網体９に超音波を照射したり、振盪したり、撹拌したりすること等により、溶解効率を向上させるような処理を施してもよい。 For example, when the auxiliary material 12 is water-soluble polyvinyl alcohol, a method of dissolving and removing the auxiliary material 12 by immersing the net 19 in water, preferably hot water, can be mentioned. The water temperature and treatment time are appropriately selected according to the dissolution rate and solubility of the water-soluble polyvinyl alcohol. For example, it is preferable to use hot water of 50 ° C. or higher, more preferably 70 ° C. or higher, particularly 90 ° C. or higher. In addition, the dissolution removal treatment improves the dissolution efficiency by immersing the mesh body 9 in water and irradiating the mesh body 9 with ultrasonic waves, shaking, or stirring as necessary. You may perform such a process.
　また、例えば、補助材料１２がポリ塩化ビニルや未架橋アクリル樹脂のような有機溶媒に容易に溶解しうる有機溶媒溶解性樹脂である場合、網体１９を有機溶媒に浸漬することにより補助材料１２を溶解除去する方法が挙げられる。さらに、補助材料１２が加熱により溶融除去されるようなワックス等である場合、網体１９を加熱炉等に収容して補助材料１２のみを溶融除去させるような条件で加熱処理する方法が挙げられる。 For example, when the auxiliary material 12 is an organic solvent-soluble resin that can be easily dissolved in an organic solvent such as polyvinyl chloride or an uncrosslinked acrylic resin, the auxiliary material 12 is obtained by immersing the net 19 in the organic solvent. Is a method of dissolving and removing the above. Furthermore, when the auxiliary material 12 is a wax or the like that is melted and removed by heating, there is a method in which the net body 19 is accommodated in a heating furnace or the like and heat treatment is performed under a condition that only the auxiliary material 12 is melted and removed. .
　このような補助材料１２を選択的に除去する工程により、図６に示したような網体１９から、補助材料１２が選択的に除去されて、図７に示したような金属網２０が形成される。このような金属網の製造方法によれば、メリヤス編みの工程で金属線材１に付与されるテンション等の負荷が補助材料１２に分散されるために、金属線材１の切断を抑制しながらメリヤス編みを行うことができる。そして、メリヤス編みされた金属線材１と補助材料１２とを含む網体１９から補助材料１２のみを選択的に除去することにより、メリヤス編みされた金属線材１からなる金属網２０が得られる。 By selectively removing the auxiliary material 12 as described above, the auxiliary material 12 is selectively removed from the mesh body 19 as shown in FIG. 6 to form a metal net 20 as shown in FIG. Is done. According to such a method for manufacturing a metal net, a load such as a tension applied to the metal wire 1 in the knitting process is distributed to the auxiliary material 12, so that the knitting is performed while suppressing the cutting of the metal wire 1. It can be performed. Then, by selectively removing only the auxiliary material 12 from the net 19 including the knitted metal wire 1 and the auxiliary material 12, the metal net 20 made of the knitted metal wire 1 is obtained.
　次に本発明に係る金属網の製造方法を実施例を用いてさらに具体的に説明する。なお、本発明の範囲は本実施例により何ら限定されるものではない。 Next, the method for producing a metal net according to the present invention will be described more specifically with reference to examples. Note that the scope of the present invention is not limited in any way by this example.
［実施例］
　丸編機を用い、チタニウム線材（直径１２０μｍ、引張破断強度６Ｎ）と水溶性ポリビニルアルコール繊維（（株）ニチビ製の商品名ソルブロン品番ＳＦ、６６０dtex／２００Ｆのマルチフィラメント繊維、引張破断強度２６Ｎ）とをメリヤス編みすることにより、縦目４ｍｍ、横目３ｍｍであり、直径２０ｍｍの円筒状の網体Ａ１を連続生産した。このとき、編成は１．５秒／回転の速度で行い、この編成速度で少なくとも２０ｍは連続生産できた。そして、得られた網体Ａ１を９５℃の熱水に１分間浸漬することにより、水溶性ポリビニルアルコール繊維のみを選択的に溶解させて除去し、チタニウム網Ａを得た。得られたチタニウム網Ａを広範囲に観察したところ、チタニウム線材の切断は全く観察されなかった。このときに得られたチタニウム網Ａの写真を図８に示す。 [Example]
Using a circular knitting machine, titanium wire (diameter 120 μm, tensile breaking strength 6N) and water-soluble polyvinyl alcohol fiber (trade name SOLBRON product number SF, 660 dtex / 200F multifilament fiber, tensile breaking strength 26N manufactured by Nichibi Co., Ltd.) Was knitted to continuously produce a cylindrical net A1 having a length of 4 mm and a width of 3 mm and a diameter of 20 mm. At this time, knitting was performed at a speed of 1.5 seconds / revolution, and at least 20 m could be continuously produced at this knitting speed. Then, the obtained net A1 was immersed in hot water at 95 ° C. for 1 minute to selectively dissolve and remove only the water-soluble polyvinyl alcohol fiber, thereby obtaining a titanium net A. When the obtained titanium net A was observed over a wide area, no cutting of the titanium wire was observed. A photograph of the titanium net A obtained at this time is shown in FIG.
［比較例１］
　丸編機を用い、チタニウム線材（直径１２０μｍ）のみをメリヤス編みすることにより、縦目４ｍｍ、横目３ｍｍであり、直径２０ｍｍの円筒状のチタニウム網Ｂを製造した。このとき、編成は実施例と同様の１．５秒／回転の速度で行った。しかしこの編成速度ではチタニウム線材がすぐに切断されることによりもつれて、網構造がほとんど形成されず３０ｃｍの連続生産もできなかった。このときに得られたチタニウム網Ｂの写真を図９に示す。 [Comparative Example 1]
Using a circular knitting machine, only a titanium wire (diameter 120 μm) was knitted to produce a cylindrical titanium net B having a length of 4 mm and a width of 3 mm and a diameter of 20 mm. At this time, knitting was performed at a speed of 1.5 seconds / rotation as in the example. However, at this knitting speed, the titanium wire was immediately cut and tangled, so that a network structure was hardly formed and continuous production of 30 cm could not be performed. A photograph of the titanium net B obtained at this time is shown in FIG.
［比較例２］
　編成を１．５秒／回転で行う代わりに、工業上実用的ではない４．０秒／回転のような極めて遅い編成スピードで行った以外は、比較例１と同様にしてチタニウム網を製造した。このような極めて遅いスピードで編成した場合には、チタニウム線材の切断が抑制され金属網はいくらか形成された。しかし、１ｍほど連続生産したところで、切断が多く発生したので、編成を中止した。得られたチタニウム網の中央部あたりの領域を目視により観察したところ、例えば図１０に示すように、１００ｃｍ2あたり平均１０個以上のチタニウム線材の切断部が観察された。 [Comparative Example 2]
A titanium net was produced in the same manner as in Comparative Example 1 except that the knitting was performed at an extremely slow knitting speed such as 4.0 seconds / rotation which was not industrially practical instead of knitting at 1.5 seconds / rotation. . When knitting at such an extremely slow speed, cutting of the titanium wire was suppressed and some metal nets were formed. However, after about 1 m of continuous production, a lot of cutting occurred, so the knitting was stopped. When the area around the central portion of the obtained titanium net was observed visually, for example, as shown in FIG. 10, an average of 10 or more cut portions of titanium wire per 100 cm 2 was observed.
　本発明は、医療材料として用いられるチタニウム網や、圧縮してエンジンに接続された排気管周りに配設される緩衝材を製造するためのワイヤーメッシュや、球面継手のシール体を製造するためのワイヤーメッシュや、自動車のエアバックのインフレータの製造に用いられるワイヤーメッシュの製造に適用できる。

  The present invention provides a titanium mesh used as a medical material, a wire mesh for producing a shock absorber disposed around an exhaust pipe compressed and connected to an engine, and a sealing body for a spherical joint. It can be applied to the production of wire meshes and wire meshes used in the production of automobile airbag inflators.

Claims (11)

  1. 　金属線材と、該金属線材に沿わせた選択的に除去可能な材料からなる補助線材と、をメリヤス編みすることにより網体を形成する工程と、
    　前記網体から前記補助線材を選択的に除去する工程と、を備えることを特徴とする金属網の製造方法。     Forming a net by knitting a metal wire and an auxiliary wire made of a selectively removable material along the metal wire; and
    And a step of selectively removing the auxiliary wire from the mesh body.
  2. 　前記補助線材を選択的に除去する工程は、前記補助線材のみを選択的に溶解又は分解する処理液により、前記補助線材を除去処理する工程である請求項１に記載の金属網の製造方法。 The method for producing a metal net according to claim 1, wherein the step of selectively removing the auxiliary wire is a step of removing the auxiliary wire with a treatment liquid that selectively dissolves or decomposes only the auxiliary wire.
  3. 　前記補助線材は水溶性樹脂を含み、前記処理液は水である請求項２に記載の金属網の製造方法。 The method for producing a metal net according to claim 2, wherein the auxiliary wire includes a water-soluble resin, and the treatment liquid is water.
  4. 　前記水溶性樹脂は水溶性ポリビニルアルコールである請求項３に記載の金属網の製造方法。 The method for producing a metal net according to claim 3, wherein the water-soluble resin is water-soluble polyvinyl alcohol.
  5. 　前記補助線材はアルカリ分解性を有し、前記処理液はアルカリ性溶液である請求項２に記載の金属網の製造方法。 The method for producing a metal net according to claim 2, wherein the auxiliary wire has alkali decomposability and the treatment liquid is an alkaline solution.
  6. 　前記補助線材は所定の有機溶剤に溶解し、前記処理液は該補助線材を溶解する有機溶剤である請求項２に記載の金属網の製造方法。 The method for producing a metal net according to claim 2, wherein the auxiliary wire is dissolved in a predetermined organic solvent, and the treatment liquid is an organic solvent that dissolves the auxiliary wire.
  7. 　前記補助線材を選択的に除去する工程は、前記補助線材のみを焼失させることにより補助線材を除去処理する工程である請求項１に記載の金属網の製造方法。 The method for producing a metal net according to claim 1, wherein the step of selectively removing the auxiliary wire is a step of removing the auxiliary wire by burning off only the auxiliary wire.
  8. 　前記補助線材がマルチフィラメント又はヤーンである請求項１～７の何れか１項に記載の金属網の製造方法。 The method for manufacturing a metal net according to any one of claims 1 to 7, wherein the auxiliary wire is a multifilament or a yarn.
  9. 　前記補助線材の引張破断強度が前記金属線材の引張破断強度よりも高い請求項１～７の何れか１項に記載の金属網の製造方法。 The method for producing a metal net according to any one of claims 1 to 7, wherein the tensile breaking strength of the auxiliary wire is higher than the tensile breaking strength of the metal wire.
  10. 　選択的に除去可能な補助材料で被覆された被覆金属線材をメリヤス編みすることにより網体を形成する工程と、
    　前記網体から前記補助材料を選択的に除去する工程と、を備えることを特徴とする金属網の製造方法。     Forming a mesh by knitting a coated metal wire coated with a selectively removable auxiliary material; and
    And a step of selectively removing the auxiliary material from the mesh body.
  11. 　チタニウム系又はアルミニウム系の線材をメリヤス編みして得られた金属網であって、
    前記線材の直径は４０～２００μｍであり、
    メリヤス編みの縦目２～６ｍｍ、横目１～５ｍｍであり、
    １００ｃｍ2あたりの切断部の数が平均２個以下であることを特徴とする金属網。

          A metal net obtained by knitting a titanium-based or aluminum-based wire,
    The wire has a diameter of 40 to 200 μm,
    The knitted knitted stitches are 2-6mm long and 1-5mm wide.
    An average number of cut parts per 100 cm 2 is 2 or less.

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