JPH0352733A - Wire net - Google Patents

Abstract

PURPOSE:To impart self-lubricity to a wire net and to improve the corrosion resistance thereof while suppressing activity at the time of using extremely fine wires consisting of piano wires, stainless wires or steel wires of low-carbon two-phase structure constituted vertical wires and horizontal wires by forming Ni plating coated layers on the surfaces of the above-mentioned extremely fine wires. CONSTITUTION:The vertical wires 2 and the horizontal wires 3 are knitted by inverting the horizontal wires 3 at the ends without cutting the same to form the wire net. At least either of the vertical wires 2 and the horizontal wires 3 of such wire net are constituted of the extremely fine wires consisting of either of the piano wires and stainless steel wires having <=160mum wire diameter or the steel wires having the low-carbon two-phase structure and >=300kg/mm<2> tensile strength or the twisted wires formed by twisting and doubling plural pieces of the above-mentioned extremely fine wires. Further, the Ni plating coated layers 5 are formed on the outside surfaces of the extremely fine wires 4.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention can be used as a reinforcing member for fiber reinforced resin (FRP), fiber reinforced metal (FRM), etc., or as a source plate for printing on metal plates. Regarding the wire mesh, in particular, it is possible to suppress the activity of the ultra-fine wires themselves constituting the wire mesh to prevent burnout and disconnection during the twisting process of the ultra-fine wires, and improve workability when forming the wire mesh, and The present invention relates to a structure that can improve corrosion resistance and also improve adhesion and adhesion when resin coating is applied.

[Conventional technology]

For example, as a reinforcing wire mesh for FRP, FRM, etc., a single metal wire can be used as a vertical line. There are some that are used as horizontal wires and are woven together, and conventionally annealed materials have been used for these single metal wires. However, in the case of this annealed material, sufficient reinforcing function cannot be obtained due to its low tensile strength. in this case,
Increasing the wire diameter of the annealed material can improve the tensile strength of the wire mesh itself, but as the wire diameter increases, it becomes difficult to knit together using wire mesh weaving and riving machines, and the wire mesh becomes larger to begin with. There is a problem with doing so.

By the way, for reinforcing wire mesh such as FRP, it is required to make the strength of the wire mesh as high as possible and to improve workability when performing knitting work using a wire mesh loom. To this end, it is necessary to greatly improve the tensile strength of the vertical and horizontal wires that make up the wire mesh, while reducing the wire diameter to, for example, 160 μm or less.

[Problem that the invention seeks to solve]

However, through experimental research by the inventors, the wire diameter was 160μ.
It has been found that the following problems must be solved when using ultrafine metal wires with a diameter of less than m.

i. When a metal wire is ultra-fine to 160 μm or less, the ratio of surface area to volume becomes extremely large, so the surface activity of the ultra-fine wire becomes abnormally high, resulting in friction with the die or twisting when ultra-fine. There is a risk of burnout or wire breakage due to heat generation due to friction between the ultra-fine wires when wire-forming.

Therefore, it is necessary to suppress the activity of the ultrafine wire itself.

ii. In addition, in order to ensure workability when the above-mentioned ultra-fine wire is subjected to wire mesh knitting machine, twisted wire processing, etc.,
It is necessary to provide self-lubricating properties to the ultrafine wire itself.

iii. Furthermore, since the above-mentioned ultra-fine wire is made of steel, it is susceptible to rust, and since it is ultra-fine, if rust occurs, the effect will be large and the characteristics will be fatally deteriorated.

Therefore, it is necessary to provide corrosion resistance to prevent the occurrence of rust.

iv. Furthermore, when coating the outer surface of the stranded ultra-fine wires with a resin, it is necessary to improve the adhesion and adhesion between the resin coating layer and the ultra-fine wires. This is because if the adhesion is insufficient, the ultra-fine wire may come off from the resin due to tension or twisting, and the characteristics of the ultra-fine wire may not be utilized effectively.

An object of the present invention is to provide a wire mesh that can solve the problems described above when using ultrafine metal wires with a wire diameter of 160 μm or less.

[Means for solving problems]

Therefore, the invention of item 1 of the present application provides a wire mesh in which a vertical line and a horizontal line are knitted together by reversing the horizontal line without cutting the horizontal line at the end, in which at least one of the vertical line and the horizontal line has a wire diameter of 1.
It consists of an ultra-fine wire made of piano wire, stainless steel wire, or low-carbon dual-phase steel wire of 60 μm or less, or a stranded wire made by twisting a plurality of these ultra-fine wires, and N is applied to the outer surface of the ultra-fine wire.
It is characterized in that an i-plated coating layer is formed.

The invention set forth in item 2 is characterized in that a resin coating layer is formed on the surface of the ultrafine wire or stranded wire, and the invention in item 3 is characterized in that a processing strain is formed in the Ni plating coating layer by plastic working. It is characterized by

Hereinafter, the reason for adopting the above structure in the present invention will be explained in detail.

l. Why piano wire, stainless steel wire, or low carbon dual-phase steel wire was used as the ultra-fine wire Vertical lines of wire mesh. The ultra-fine wire that makes up the horizontal wire must have high strength and excellent ductility, and in order to satisfy these characteristics with a wire diameter of 160 μm or less, piano wire. Stainless steel wire or low carbon duplex steel wire is most suitable. Here, when a low carbon dual structure steel wire is employed as the ultra-fine wire, the tensile strength can be improved without making the wire diameter even smaller than that of a piano wire or the like.

This low carbon duplex m-weave steel wire was researched and developed by the inventors of the present invention, and was achieved by discovering the following points. That is, it is an Fe-C-Si-Mn iron-based alloy and has a composite metal structure in which a low-temperature transformed phase consisting of acicular martensite, paynite, or a mixed structure thereof is uniformly dispersed in a ferrite phase. Steel wire material is excellent in strong processing,
By using a wire having such a metal structure, it is possible to easily and reliably obtain an ultrafine wire having a wire diameter of 100 μm or less by cold drawing. If such a steel wire rod is strongly worked to a working strain of 4 or more by cold wire drawing, a composite structure (two-phase structure) consisting of the above-mentioned ferrite phase and a low-temperature transformation phase will be formed, extending in one direction. A fibrous fine metal structure is formed, and the ultrafine wire with such a metal structure has a tensile strength of 300
kg/w”, and the toughness is comparable to that of piano wire or stainless steel wire.

Such a fibrous fine metal wire has a completely new structure that has not been previously known. The present inventors believe that the above-mentioned metal structure is the main cause of improving tensile strength,
As a result of further research into the strengthening mechanism,
It was discovered that in the metal structure having ultra-high strength as described above, the spacing between the fibers is 50 to 1000 cells, and the fibrous composite structure is composed of ultrafine cells of 5 to 100 cells. Ta.

Next, a method for manufacturing the above-mentioned low carbon dual-phase steel wire will be explained.

First, C: 0.01-0.5%, Si: 3 in weight%
．． 0% or less, Mn: 5. 0% or less, the balance is Fe and unavoidable impurities, and the wire diameter is 3.5n or less.
After being heated to a temperature in the range of 100°C, it is cooled (this heating and cooling may be performed multiple times) to produce a low-temperature structure consisting of martensite, paynite, or a mixed structure thereof that may contain some residual austenite. A wire rod having a composite structure in which a certain phase of transformation is uniformly dispersed in a ferrite phase at a volume ratio of 15 to 75% is manufactured. The above-mentioned manufacturing method is described in Japanese Patent Laid-Open No. 62-20824.

Next, the thus obtained composite textured wire rod is subjected to strong processing by cold wire drawing to a working strain of 4 or more, preferably 5 or more, to combine the ferrite phase and the low-temperature transformed biophase, and to form a metal. Forms a fine fibrous structure that extends continuously in one direction.

By increasing the degree of processing in this way, the above fibrous &I
The weave is further refined, the fiber spacing becomes narrower, and finally it becomes a fibrous fine metal structure with cell size and fiber spacing of 5 to 100 cells and 50 to 1000 cells, respectively, which are produced during processing as described above. . Note that in a thin wire obtained by wire drawing with a processing strain of 4 or less, the fibrous structure is still in the process of development and the structure is incomplete, and therefore the strength is low.

■． Reason for forming the Ni-plated coating layer on the outer surface of the ultra-fine wire The Ni-plated coating layer is formed to suppress the activity of the wire and provide self-lubricating properties and corrosion resistance. Adhesion with resin.
This is to improve adhesion.

As mentioned above, when wires such as piano wires and low carbon two-phase M&wire wires are made extremely fine, their volume and surface area ratios become extremely large, and their activity increases abnormally.

On the other hand, research conducted by the present inventors has revealed that since Ni is a metal with extremely low activity, by coating the surface of the wire with Ni, the activity of the ultrafine wire itself can be suppressed.

In addition, coating with Ni not only imparts normal properties such as corrosion resistance, but also provides self-lubricating properties that improve formability in wire drawability and wire stranding, and is also superior to other coated metals. TeN
It was found that i has very good compatibility with the resin and can improve adhesion to the resin.

Table 1 shows various metals (Ni, Cu, Zn,
Cu-Zn, Aj! , Au, Ag, Cr) were compared for each property (improved die life, rust prevention, oxidation, adhesion, surface treatment, corrosion resistance, self-lubricating, decorative, and electrical conductivity). show something As is clear from the table, Ni can improve die life due to its high self-lubricating properties, has high corrosion resistance such as rust prevention and oxidation prevention, has excellent adhesiveness with resin, and has excellent surface treatment properties. expensive. In this way, both comprehensively and from the above-mentioned characteristics, Ni
is found to be the best. Therefore, it can be seen that the above-mentioned i=ivO problem can be solved by coating with Ni.

The above-mentioned Ni coating method is electroplating, hot-dip plating. Commonly used means such as wet plating methods such as PCO, CVO, and dry plating methods such as sputtering can be employed. Of course, the Ni plating mentioned here includes pure N.
In addition to i, Ni plating alloyed with the metals listed in Table 1 or other metals is also included within a range that does not impede the above-mentioned necessary properties. In addition, regarding the amount of Ni coating on the above-mentioned ultra-fine wire, Ig per 1 kg of ultra-fine wire.
If it is less than 100g, it is difficult to achieve the above-mentioned coating effects such as rust prevention, and if it exceeds 100g, no improvement in the coating effect can be expected, and on the contrary, secondary disadvantages such as bordering during processing due to thick weight may occur. Undesirable because of the sign.

Therefore, a range of 1 to 100 g per 1 kg of ultrafine wire is appropriate.

■． The reason why the processing strain was applied to the above Ni plating coating layer by plastic working is that the Ni plating coating layer that has just been plated has a porous shape with countless screws and holes, so the plating process Hydrogen that is generated during this time is occluded in the Ni coating layer, or air remains in the bolus, and the occluded hydrogen and residual air are released by the heat during resin coating, or expand and cause the resin to evaporate. Accumulates at the boundary between the coating layer and the Ni plating coating layer,
As a result, the adhesion between the two. This is thought to have an adverse effect on adhesion.

On the other hand, when processing strain is applied to the Ni plating coating layer, the pinholes in the coating layer are crushed and disappear, and the hydrogen and residual air are released due to processing heat during wire drawing. , a good Ni plating coating layer containing almost no residual air can be obtained. the result,
When the ultrafine wire and the resin are integrated, the adhesion and adhesion between the two can be further improved. In order to suppress the processing distortion, for example, in the manufacturing process of the ultra-fine wire, Ni plating is applied to the wire before cold wire drawing, and then the wire is drawn.

[Effect]

According to the wire mesh according to the invention of item 1 of the present application, the ultra-fine wires used for the vertical and horizontal lines include piano wire and stainless steel wire. Since a low-carbon dual-phase network wire is used, predetermined tensile strength and ductility can be ensured with a wire diameter of 160 μm or less. In particular, when a low carbon duplex steel wire is used, as explained in the strengthening mechanism above, wires with a diameter of 100 μm or less can be easily obtained.
Moreover, it has an ultra-high strength of 3oO to 600 kgf/tm''. Therefore, the tensile strength can be further improved compared to piano wire and stainless steel wire.

In addition, since a Ni plating coating layer was formed on the ultra-fine wire,
Since it is possible to suppress an abnormal increase in activity due to ultra-thin wires, burnout and wire breakage can be avoided even if heat is generated due to friction during twisting. In addition, the coating with N11 i plating provides self-lubricating properties, which improves workability when turning the ends of horizontal wires on a wire mesh knitting machine or when twisting multiple ultra-fine wires. Corrosion resistance can be improved and rust can be prevented.

Furthermore, since the Ni plating coating layer is formed, when ultrafine wires or stranded wires are coated with resin as in the invention described in item 2, this Ni plating coating layer can improve the adhesion and adhesion between the two, and the tensile strength It is possible to reliably prevent it from coming off due to etc. Furthermore, in the third aspect of the invention, since a processing strain is formed in the Ni plating coating layer, hydrogen is generated between the coating layer and the resin coating layer. Better adhesion without residual air remaining. Adhesion can be improved.

〔Example〕

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 4 are diagrams for explaining a wire mesh according to an embodiment of the present invention.

In the figure, reference numeral 1 denotes a wire mesh with a plain weave structure, which is made by interweaving vertically twisted wires 2 and horizontally twisted wires 3. This vertical. The horizontally twisted wires 2.3 each have a wire diameter of 1
It is constructed by twisting 2 to 100 ultra-fine wires 4 of 60 μm or less together to form a strand 7, and further forming a resin coating layer 6 on the outer surface of the strand 7. Each strand 7 is bent into a wave shape. It is formed and knitted at a predetermined mesh interval. Although not shown, the horizontally twisted wires 3 are inverted inward at the left and right ends of the wire mesh 1, and the inverted portions are continuous without being cut.

The ultrafine wire 4 is made of a low carbon two-phase structure TiR wire, which has a weight percentage of 7 C: 0.01-0.50%, Si: 3
．． 0% or less, Mn: 5.0% or less, balance Fe and unavoidable impurities. A wire rod with a diameter of 3.0 to 6.0 mm is subjected to primary heat treatment, primary cold wire drawing, secondary heat treatment, and secondary cold drawing. It is manufactured by strongly processing the wire to have a wire diameter of 15 to 100 μm. This ultra-fine wire 4 forms a fibrous fine metal structure in which processed cells produced by the above-mentioned strong processing are arranged in a fibrous shape in one direction, and the size of the processed cells and the fiber spacing are 5 to 100 mil, respectively. , 50 to 1000 people, and the tensile strength is 300 to 600 kgf/2.

An N1 plating coating layer 5 is formed on the outer surface of each of the ultrafine wires 4. This Ni plating coating layer 5 is plastically worked at the same time when the wire rod is plated and then subjected to cold wire drawing, and therefore has a working strain. That is, the above Ni plating coating layer 5 is formed by plating the wire rod in a pre-processing process of wire drawing to form a coating layer of about 4 μm.
This is drawn to a thickness of approximately 1 μm by primary and secondary cold drawing. As a result, the pinholes that had occurred during the plating process were crushed, resulting in a good coating layer with no defects.

As described above, according to the gold ml of this example, the vertically twisted wire 2. A Ni plating coating layer 5 is applied to each ultrafine wire 4 used in the horizontally twisted wire 3.
, the activity of the ultrafine wire itself can be lowered, and burning out due to heat generation can be avoided. Furthermore, by forming the Ni plating coating layer 5, self-lubricating properties can be improved, and it is possible to facilitate the reversing process when applying to a wire mesh knitting machine or the twisting process when making the ultra-fine wire 4 into strands. ,
Moreover, it can prevent rust caused by oxidation. As a result, the wire diameter is 1
It becomes possible to create a wire mesh using ultrafine metal wires of 60 μm or less.

In addition, in this example, the Ni plating coating layer 5 was shaped and subjected to processing strain, so that the structure was free of pinholes etc. due to the processing strain, and almost all hydrogen and residual air were removed. Since the resin coating layer 6 is formed on the outer surface of the ultra-fine wire 7, the adhesion and adhesion can be greatly improved, and when stress such as tension or twisting is applied to the ultra-fine wire 4. , can prevent it from coming off from the resin.

Furthermore, in this example, a low carbon dual-phase steel wire is used as the ultra-fine wire 4, so the wire diameter is 10 to 100 μm and the tensile strength is 300 μm.
It has an extremely high strength of ~600 kgf/tm", and can significantly improve the tensile strength and ductility of the wire mesh 1. Furthermore, since multiple ultra-thin wires 4 are stranded, the ductility and tensile strength of the wire mesh 1 can be significantly improved. can be improved.

In addition, in the above embodiment, the case where a low carbon dual-phase steel wire is adopted as the ultra-fine wire 4 has been explained as an example, but the ultra-fine wire of the present invention may also be a piano wire. Stainless steel wires can be used, and in these cases, they can also be made inert by forming a Ni plating layer. Lubricity, corrosion resistance and adhesion. Adhesion can be improved.

Further, in the above embodiment, a plurality of ultra-fine wires 4 are twisted,
Although the case where the resin coating layer 6 is formed on this is explained as an example, the present invention does not necessarily require forming the resin layer. Furthermore, although processing distortion was formed in the Ni plating coating layer 5, the present invention can improve adhesion and adhesion even in the absence of processing distortion.

Furthermore, in the above embodiments, the ultra-fine wires were twisted and used as vertical lines and horizontal lines, but the wire mesh of the present invention may be made of a single line of ultra-fine wires, and either vertical lines or horizontal lines may be used. It is also possible to use only one side of the ultra-fine wire and the other metal wire, such as a titanium wire or 5-high manganese steel wire, or to mix and twist the ultra-fine wire of the present invention with another metal wire. In the case of composite wire mesh made in this way,
It is possible to combine the advantages of each.

16 Here, an experiment conducted to confirm the effect of improving adhesive strength with resin by forming a Ni plating coating layer on the ultrafine wire of this example will be described.

In this experiment, as shown in FIG.
A part of it is made of epoxy resin as a base and carbon fiber is added to it. Embed it in a composite sample piece b made of a mixture of glass fibers, and with this composite sample piece b fixed, pull the top of the ultra-thin wire a until it passes through or breaks, to check the adhesion and adhesion between the two. Examined. In addition, the above composite sample piece b
The embedded length L was set to be the wire diameter d (■) of the ultra-fine wire a x 50.

As shown in Table 2, if four ultra-fine wires with a square wire diameter of 50 μm are prepared and Ni plating is not formed on each of these ultra-fine wires (1'hl), the Ni plating coating layer is formed and then the wire is drawn. When processing distortion is applied by processing (Nll2), and when the surface is further coated with resin (t'h3)
A pullout test was conducted on the case (NIl4) coated only with Ni plating. We also adopted an ultra-fine wire with a wire diameter of 100 μm, which was also coated with Ni plating (1
'h5), and a similar drawing test was also conducted for the case where processing strain was applied to this by wire drawing (6). In the table, the x mark indicates the case where the ultra-thin wire a has come off from the composite sample piece b, and the o mark indicates the case where the ultra-fine wire a has broken.

As is clear from the table, the case (M1) with a wire diameter of 50 μm and no Nt plating was removed, and the adhesive strength between the two was less than the breaking force of the ultrafine wire.

On the other hand, when Ni plating was applied (lt4), processing strain was applied to this (inhibition 2), and resin coating was applied again (inhibition 3), the wire broke before it could be pulled out. It can be seen that the adhesive force between the two is greater than the breaking force of the ultra-fine wire.

On the other hand, in the case (M5) in which the wire diameter is 100 μm and only the Ni plating layer is formed, the wire comes off before it breaks. This is because the tensile force is also high because the wire diameter is large, so it is thought that the adhesive strength was not as strong as this high tensile force. However, when machining strain was applied to this (M6), the wire broke, which shows that machining strain improves adhesive strength, and when the wire diameter is relatively thick, the tensile force of the ultra-thin wire itself is large. Therefore, it can be seen that by applying processing strain, an adhesive force that can cope with this large tensile force can be obtained, and the effect is even greater.

〔Effect of the invention〕

As described above, according to the wire mesh according to the invention of item 1 of the present application, a Ni plating coating layer is formed on the surface of the ultrafine wire made of piano wire, stainless steel wire, or low carbon dual-phase steel wire that constitutes the vertical and horizontal wires. Therefore, it is possible to suppress the activity when using ultrafine wires with a wire diameter of 160 μm or less, provide self-lubricating properties to facilitate stranding processing, improve corrosion resistance against oxidation, and further improve resin This has the effect of improving the adhesion and adhesion when coating, and in the third aspect of the invention, since processing strain is formed in the Ni plating coating layer, the adhesion with the resin can be further improved.

l9 20

[Brief explanation of drawings]

1 to 4 are diagrams for explaining a wire mesh according to an embodiment of the present invention, and FIG. 1 is an enlarged plan view thereof, and FIG.
The figure is an enlarged cross-sectional view, Figure 3 is a cross-sectional view of the stranded wire, Figure 4 is a schematic diagram showing the twisted wire state, and Figure 5 is an experiment conducted to confirm the effect of this example. FIG. 2 is a diagram illustrating the method. In the figure, 1 is wire mesh, 2 is vertically twisted wire, 3 is horizontally twisted wire,
4 is an ultra-fine wire, 5 is a Ni plating coating layer, 6 is a resin coating layer,
7 is a twisted wire.

Claims (3)

[Claims] (1) In a wire mesh in which vertical lines and horizontal lines are woven together by reversing the horizontal lines without cutting the horizontal lines at the ends, at least one of the vertical lines and the horizontal lines is made of piano wire, stainless steel wire, or the like with a wire diameter of 160 μm or less. Tensile strength 300kg/mm^
It is composed of an ultra-fine wire made of any of two or more low carbon dual-phase steel wires or a stranded wire made by twisting a plurality of the ultra-fine wires, and a Ni plating coating layer is formed on the outer surface of the ultra-fine wire. A wire mesh characterized by the presence of (2) The wire mesh according to claim 1, wherein a resin coating layer is formed on the outer surface of the ultrafine wire or stranded wire. (3) The wire mesh according to claim 1 or 2, wherein the Ni plating coating layer has processing strain due to plastic deformation.