KR20160125038A

KR20160125038A - Volatile Corrosion Inhibitor packing and method for manufacturing the same

Info

Publication number: KR20160125038A
Application number: KR1020150055674A
Authority: KR
Inventors: 이두맹
Original assignee: 주식회사 예스테크
Priority date: 2015-04-21
Filing date: 2015-04-21
Publication date: 2016-10-31
Also published as: KR101684267B1

Abstract

The present invention is characterized in that a polymer resin of the same raw material constituting the raw material is extruded on one side of a fabric constituting a rust preventive packaging material and the rustproofing agent composed of fine particle powder is thermally bonded to one side of the polymer resin, Provided is a vapor-proof rust preventive packaging material capable of preventing corrosion at the time and a method of manufacturing the same.
In addition, since the work process for manufacturing the rust preventive packaging material is simple, the productivity is improved, the cost is reduced, the packaging property is excellent because of the curling phenomenon, flexibility, and physical strength of the wrapping paper. And a method of manufacturing the same. The present invention relates to a nonwoven fabric made of polyethylene or polypropylene, a fabric (1) made of any one selected from the group consisting of hemp, A polyethylene or polypropylene polymer resin (2) formed on one surface of the fabric (1); The rust preventive layer 3 is formed by thermally adhering a rust preventive composed of solid fine particle powder to one surface of the polyethylene or polypropylene polymer resin 2.

Description

Technical Field [0001] The present invention relates to a vapor-proof rust preventive packaging material and a manufacturing method thereof,

The present invention relates to a vapor-proof rust preventive packaging material and a method for producing the same. More specifically, the present invention relates to a vapor-proof rust-preventive packaging material and a method for producing the same, And a rust preventive agent composed of solid fine particle powder is thermally adhered to one side of the polymer resin to prevent corrosion in packaging of metal machinery and metal parts and a manufacturing method thereof.

In addition, since the process is simple, the productivity is improved, the cost is reduced, the vapor-permeable rust-preventive packaging material having excellent packaging suitability due to the wrapping paper curling phenomenon, flexibility, And a manufacturing method thereof.

Conventional vapor-proof rust-preventive packaging materials are realized by applying vapor-proof rust inhibitor to wrapping paper made of synthetic resin or the like. However, these vapor-proof rust-preventive packaging materials lacked tensile and rupture strength and could not be suitably used as packaging materials.

On the other hand, in order to increase the tensile and rupture strength, vapor-proof rust-preventive packaging materials in which antirust paper coated with rust preventive and coating paper are coated with synthetic resin coated paper have been proposed. However, such a vapor-resistant anti-corrosive packaging material has been inferior in economic efficiency due to its complicated manufacturing process. In addition, such a structure has a problem that waste is produced in the manufacturing process.

That is, in the conventional vapor-permeable anti-corrosive packing material, the anti-rust agent and the polymer resin are not mixed with each other due to a difference in particle size between the rust inhibitor and the polymer resin. In order to improve this, it is necessary to make an anti-rust masterbatch that pelletizes rustproofing agent and polymer resin in the first step, and the anti-rust masterbatch and the polymer resin should be extruded in the secondary process. In general, the melting point of the rust preventive raw material is less than 200 ° C., but the rustproofing agent is oxidized at high temperature due to extrusion molding at a high temperature of about 250 to 350 ° C.

In addition, extrusion molding with a rust preventive agent and a polyethylene or polypropylene resin at an elevated temperature by an extrusion molding machine melts the rust inhibitor in the cylinder of the extrusion molding machine, and feeding of the polymer resin is not smooth, resulting in poor workability.

In order to improve this, there is a problem that the additive is added or the amount of the rust inhibitor is decreased, and the rustproofing is deteriorated. Since the primary and secondary work processes must be performed, the work process is complicated and the productivity is lowered and the manufacturing cost is increased . Also, as the rust inhibitor is operated at a high temperature, there is a problem that the working environment is poor due to the rust prevention gas and the smell.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a packaging material comprising a polyethylene or polypropylene fabric, a polymeric resin as a raw material constituting the fabric, and a solid fine particle powder Which can prevent corrosion during packaging of metal machinery and metal parts, and a method of manufacturing the same.

In addition, a new type of vapor-resistant anti-corrosive packing material which is excellent in packing suitability and composed of the same material and can be recycled because of productivity improvement, cost reduction, curling of packaging paper, flexibility, And a method for producing the same.

According to an aspect of the present invention for achieving the above-mentioned object, there is provided a fabric comprising: a fabric (1) made of any one selected from the group consisting of polyethylene or polypropylene; A polymer resin (2) which is selected from any one of polyethylene or polypropylene material which is the same raw material as the fabric (1) and extruded; The rust preventive 3 made of solid fine particles is dispersed in a quantitative and uniform manner on one surface of the polymer resin 2 and thermally bonded to the surface of the polymer resin 2.

The rustproofing agent according to the present invention may contain 5 to 15% by weight of triazoles, 10 to 30% by weight of organic acid amine salts, 10 to 30% by weight of fatty acid amine salts, 5 to 50% by weight of alkaline earth metals, By weight to 10% by weight.

The present invention relates to a nonwoven fabric made of polyethylene or polypropylene, a fabric 1 made of one selected from the group consisting of a nonwoven fabric made of polyethylene or polypropylene, a polymer resin 2 of the same raw material as the raw material of the fabric 1, (S100), and a method of thermally adhering a polyethylene or polypropylene resin (2), which is a high-adhesion resin of the same raw material as the raw fabric, to the one surface of the fabric 1 by T-die (S200) of extruding the polymer resin (2) made of the same raw material as the raw material (1) and introducing the rust preventive material (3); and a step of injecting the raw material (1) and the polymer resin (S300) for pressing the material by a press roll pressing method so that the air-tight anti-corrosive wrapping material formed in the series of steps does not curl, S400).

In the method of manufacturing the vapor-proof anti-corrosive packing material according to the present invention, the rust-preventive agent is made of solid fine-particle powder and is quantitatively and uniformly dispersed through the rust-preventive agent supply device 4 to be put on one side of the polymeric resin 2 .

The rustproofing agent according to the present invention may contain 5 to 15% by weight of triazoles, 10 to 30% by weight of organic acid amine salts, 10 to 30% by weight of fatty acid amine salts, 5 to 50% by weight of alkaline earth metals, , And 1 to 10% by weight of a binder.

In the method of manufacturing the vapor-proof anti-corrosive packing material according to the present invention, the rust-preventive supply device 4 includes a charging port 5 into which a rust-preventive agent composed of solid fine particle powder is charged; A supply regulator (6) installed at a lower portion of the charging port (5) for regulating the supply of the rust inhibitor to be injected through the charging port (5); A crusher (7) installed at the lower part of the supply regulator (6) for crushing the rust inhibitor supplied through the supply regulator (6); The rust preventive agent is dispersed quantitatively and uniformly on the surface of the polymeric resin (2), which is a raw material of polyethylene or polypropylene, by the crusher (7) And a mesh roll (8) for feeding the mesh roll (8).

Industrial Applicability As described above, according to the present invention, the nonwoven fabric processed into polyethylene or polypropylene resin, the raw fabric of the saddle form, and the rustproofing agent composed of solid fine particle powder are thermally adhered to one surface of the raw polymer resin, It is possible to prevent corrosion of the metal parts and packaging of the metal parts.

In addition, since the work process is simple, productivity is improved, cost is reduced, and the wrapping paper has a curling phenomenon, flexibility, and a predetermined physical strength, so that it has excellent packaging suitability and can be made of the same material and can be recycled.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram for explaining a method for manufacturing a vapor-proof rust preventive packaging material according to a preferred embodiment of the present invention;
2 is a cross-sectional view of a vapor-resistant anti-corrosive wrapper according to a preferred embodiment of the present invention,
FIG. 3 is a process diagram for manufacturing a vapor-resistant rust preventive packaging material according to a preferred embodiment of the present invention,
FIG. 4 is a view showing a rust preventive supplying apparatus in a process for producing a vapor-resistant rust preventive packaging material according to a preferred embodiment of the present invention,
5 is a view showing a process for preventing the drying of the vapor-proof anti-corrosive packing material according to the preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals are used to denote like elements in FIG. 1 through FIG. In the drawings and the detailed description, detailed description of specific elements and functions of elements not directly related to the technical features of the present invention will be omitted. .

First, some conditions must be met for packaging of metal machinery and metal parts as follows.

The first is rustproof, and it is necessary to protect metal products by preventing the oxidation of metal by transporting and storing steel products after packaging.

The second is strength, which requires constant tensile strength, tear strength and burst strength to pack heavy steel coils.

The third is packaging suitability, which is packaged by automatic and semi-automatic wrapping machines when packing steel coils. Also, many cases are manually wrapped. In this case, the packaging material should be foldable and flexible to facilitate the packaging operation. And most importantly, there should be no Curl phenomenon. If curling occurs, the efficiency of the paving work decreases and the fatigue of the worker increases.

The fourth is the recycled voice, and in many advanced countries, such as Europe, regulations on waste are required to recycle the packaging material. It is necessary to make economic and environment-friendly features by recycling raw materials of the same material, not industrial wastes, after completing the role of packaging materials.

As shown in FIG. 1, the vapor-proof rust preventive wrapper according to the preferred embodiment of the present invention comprises a fabric 1 made of one selected from a nonwoven fabric made of polyethylene or polypropylene, The rust preventive layer 3 is formed by thermally adhering the polymer resin 2 of the same raw material as that of the raw material constituting the raw fabric 1 and the rust preventive composed of solid fine particle powder on one surface of the polymer resin 2 Loses.

The rust preventive agent (3) in the vapor-proof rust preventive packaging material according to the preferred embodiment of the present invention may contain 5 to 15% by weight of triazole, 10 to 30% by weight of organic acid amine salts, 10 to 30% by weight of fatty acid amine salts, 50% by weight, and 1 to 10% by weight of a binder.

Trirazoles are composed of 1,2,3-benzotriazole, tolythriazole, 5-chlorobenzotriazole, mercapto benzotriazole, 3-aminotriazole and the like, and at least one of them is used.

Organic acids and fatty acids are composed of salicylic acid, benzoic acid, lactic acid, acetic acid, butyric acid, formic acid, octanoic acid, sebacic acid, caprylic acid, hexanoic acid, lauric acid and stearic acid.

The amines include monoethanolamine, dimethylamine, diethylamine, dimethylethanolamine, morpholine, cyclohexylamine, tributylamine, hexamethylenetetraamine, triethylamine, and the like. Of these, at least one is used do.

The alkaline earth metals include sodium benzoate, ammonium benzoate and the like, and at least one of them is used.

As described above, according to the preferred embodiment of the present invention, the rustproofing agent composed of solid fine particle powder is adhered to the polymer resin 2 on one side of the fabric 1, It has an effect of preventing corrosion.

On the other hand, the rust inhibitive performance of the vapor-permeable rust preventive agent has an initial vaporizing rust-preventive property and a vapor-induced rust-preventive property after exposure, which has a great influence on the reach distance and rustproof life of the rust preventive agent vapor.

Generally, in order to increase the initial vaporization, the molecular weight is small and the higher the vapor pressure, the better the effect. The vapor-induced rust-preventive after exposure is advantageous as the molecular weight is large and the vapor pressure is small. Since the rust-preventive properties and the post-exposure vapor-resistant rust-inhibiting properties are incompatible with each other, it is possible to satisfy the specification of KS T 1086 vapor-permeable anti-corrosive paper (type 1 H and L type).

A method for producing a vapor-resistant rust preventive packaging material using the above-mentioned rust inhibitor comprises the following steps.

(1) made of any one selected from a nonwoven fabric made of polyethylene or polypropylene and yarn and a rust preventive layer (3) formed on one surface of the high-additive resin (2) of the same raw material as the raw material constituting the raw material A rust preventive preparation step S100 for crushing the rustproofing agent to a predetermined particle size so that the rust preventive agent prepared in the above preparation step can be quantitatively measured in a T-die (S200) in which the raw material 1 and the polymer resin 2 are charged, and the rust preventive agent and the polymer resin 2 to which the above-mentioned charging step is applied are placed in the fabric (S400) for preventing the curling phenomenon by adjusting the mechanical tension of the vapor-barrier anti-corrosive packaging material manufactured through the thermal bonding step (S300). .

At this time, the rust inhibitor includes 5 to 15% by weight of triazoles, 10 to 30% by weight of organic acid amine salts, 10 to 30% by weight of fatty acid amine salts, 5 to 50% by weight of alkaline earth metals and 1 to 10% Which is the same as the rust preventive agent of the above-mentioned rust preventive packaging material, and thus a detailed description thereof will be omitted.

The introduction of the raw material 1, the polymer resin 2 and the rust preventive agent 3 proceeds at the same time. For this purpose, the rust preventive particles are subjected to a preparation step of processing and pulverizing to a predetermined size, And a preparation step of heating to a predetermined temperature so as to exhibit performance.

As shown in FIG. 3, the raw material 1 is put in the material feeding step S200 and the thermal bonding step S300, and the rubbers are thermally bonded to one side of the raw fabric 1, And the rolls 7 and 8 are bonded to each other to produce a vapor-phase rust preventive wrapping material having the coating layer 3. The wrapping material is wound around the cooling roll 9 for reducing the surface temperature of the wrapping material and fixing the polymeric resin 2 And cooled to produce a vapor-resistant rust preventive wrapper.

The carpenter of the fabric 1 may be any carpenter, but it is preferable to use 10 x 10 or 8 x 8.

The fabric (silver) acts as a reinforcing material used to increase the mechanical strength, which is called the number of carpeting for the number of threads used per inch. That is, if the number of yarns is 10 in each of the width and height in an inch, it is called 10 × 10 neck.

If the thickness of the yarn constituting the fabric 1 is the same, the more the carpenters in the yarn are, the higher the mechanical strength becomes, but the higher the price increases.

The rust inhibitor of the thermal bonding step (S300) is made of fine particulate powder through a rust preventive preparation step (S100) and is dispersed quantitatively and uniformly through the rust preventive supply device (4) .

The polymer resin 2 may be selected from any one of a polymer polyethylene (PE) resin or a polypropylene (PP) resin having the same raw material as that of the raw material constituting the raw material 1. The raw material 1 and the polymer Resin (2) should be of the same material.

That is, if the material of the fabric 1 is made of polyethylene, the polymeric resin 2 becomes the material of the polymeric PE.

As shown in FIG. 4, the rust preventive supply device 4 of the present invention comprises a charging port 5 through which a rust preventive agent made of solid fine particle powder is charged and a charging port 5 provided below the charging port 5, A crusher 7 for crushing the rust inhibitor supplied through the supply regulator 6 and provided at the lower part of the supply regulator 6 and a crusher 7 for crushing the rust preventive supplied to the lower part of the crusher 7 , And a mesh roll (8) which is provided on the surface of the polyethylene or polypropylene polymer resin (2) so as to disperse quantitatively and uniformly the rust inhibitor crushed by the crusher (7) .

The crusher 7 is an excellent crushing type fine crusher that causes fine crushing by impact, crushing, and cutting action between a high speed rotating hammer and a special shape lining. That is, many hammers that cause the pendulum motion are attached to the disk, and rotate at a high speed inside the spiral-shaped lining. At this time, the rotation speed is preferably 400 to 800 rpm. Accordingly, the particle size is about 50 microns without the classifier, and depending on the material, it can be milled to several microns.

The anti-rust agent supply device 4 may be capable of quantitatively and uniformly dispersing the anticorrosive powder by controlling the amount of the rust inhibitor to be supplied to the mesh roll 8, which is composed of fine-sized fine particles of the anti-rust agent, while rotating the fine mesh roll 8. That is, the rotation speed of the mesh roll 8 is adjusted to adjust the amount of the rust inhibitor to 6 g / m < 2 > to 15 g / m < 2 > This is because when the amount of the rust inhibitor supplied is less than 6 g / m 2, the rust inhibition performance is lowered. When the rust inhibitor supplied exceeds 15 g / m 2, the thermal adhesion with the polyethylene or polypropylene resin (2) to be.

On the other hand, the coating thickness of the polymer resin 2 formed on one side of the fabric 2 made of polyethylene or polypropylene resin is preferably 20 to 40 um. When the thickness is less than 20 μm, the heat adhesion deteriorates. In order to improve the adhesion, the molding temperature must be increased. Therefore, the rust inhibitor is carbonized to deteriorate the rustproofing property. And a phenomenon of deterioration of rustproofing occurs.

And, it is important to thermally adhere the polymer resin (2) at a working temperature of 230 to 280 degrees. That is, the lower the temperature is, the less the rust inhibitor disappears and the rustproofing property is exhibited, and the thermal deformation of the fabric is small, and the curling phenomenon can be minimized.

The anti-curl step (S400) of the present invention adjusts the mechanical tension for preventing the end curling of the vapor-proof rust preventive wrapper manufactured through the anti-rust agent preparation step (S100), the material applying step (S200), and the thermal bonding step (S300) .

The driving speed of the unwinder part and the rewinder part was controlled at a ratio of 1.05: 1.00 at a constant tension by linking the mechanical driving speed of the Un-winder and the Re-winder part of the extruder, The work is performed by minimizing the generation of tension on the fabric 1 before and after the molding.

By controlling the tension by controlling the driving speed as described above, the width of the vapor-proof rust preventive packaging material is prevented from being reduced, and the tension of the fabric 1 is not generated.

On the other hand, the vapor-proof anti-corrosive packaging material thermally adhered at a temperature of 230 to 280 degrees should be maintained at a temperature of 10 to 20 degrees Celsius of the cooling roll 9 so as to be cooled to room temperature as soon as possible. If the temperature of the cooling water is high, the temperature of the anti-rust protective packaging material gradually decreases after the extrusion molding, so that it may be hardened while being wound around the winding roll, and curling may occur.

5, an embossing roll 11 may be provided between the cooling roll 9 and the rewinder 10 to prevent curling due to the winding roll and mechanical strength . At this time, the embossing rolls 11 are installed up and down so that the pitch can be adjusted to adjust the strength of the embossing.

As described above, according to the present invention, a polyethylene or polypropylene resin thermally adhered to one side of a wrapping paper is thermally adhered to one side of a polyethylene or polypropylene resin and a rustproofing agent composed of solid fine particle powder, Can be prevented.

As described above, embodiments of the vapor-proof anti-corrosive packing material produced by the method of manufacturing the vapor-resistant anti-corrosive casing according to the preferred embodiment of the present invention are as follows.

Example 1

5 to 15% by weight of 1, 2, 3-benzotriazole, 10 to 30% by weight of sodium nitrite + hexamethyltetramine, 10 to 30% by weight of octanoic acid + dimethylethanolamine, 25 to 45% A rustproofing agent is blended with 1 to 10% by weight of polyvinyl alcohol, 8 × 8 is used as the packaging paper, and 10 g / m 2 of the rustproofing agent is supplied.

Example 2

5 to 15% by weight of 1,2,3-benzotriazole, 10 to 30% by weight of benzoic acid + dimethylethanolamine, 10 to 30% by weight of octanoic acid + dimethylethanolamine, 35 to 55% by weight of sodium benzoate, The rustproofing agent is mixed with 1 ~ 10 wt% of alcohol, 8 * 8 is used as polypropylene, and 6 g / m 2 of rust preventive is supplied.

Example 3

5 to 15% by weight of 1, 2, 3-benzotriazole, 10 to 30% by weight of sodium hypochlorite + hexamethyltetramine, 10 to 30% by weight of octanoic acid + dimethylethanolamine, 25 to 45% by weight of sodium benzoate, A rust preventive agent is blended with 1 to 10% by weight of polyvinyl alcohol, and 8 × 8 is used as polyethylene / polypropylene wrapping paper, and 15 g / m 2 of rust preventive agent is supplied.

As a result of testing by the test method specified in KS T 1086 of the vapor-proof anti-corrosive packaging material prepared by mixing the rust-preventive agent with such an example, the results shown in the following Table 1 were obtained.

division Background test Example 1 Example 2 Example 3 Vapor corrosion resistance 1 hours Rust No rust No rust No rust Contact corrosion protection 4 Cycle Rust No rust No rust No rust Wetting test (7 days) CR Rust No rust No rust No rust GI Corrosion No corrosion No corrosion No corrosion

Meanwhile, in the above Table 1, the wet test is a method not specified in the KS standard, but this test method is a test for promoting the corrosion of the metal in the actual packaging. The test conditions are rusting at a temperature of 60 ° C and a humidity of 95% It can be observed clearly.

In addition, the results of the test for the curling resistance of the vapor-proof rust preventive packaging material produced by the method of manufacturing the vapor-resistant rust preventive packaging material according to the preferred embodiment of the present invention are as follows.

The curling of the packaging material determines whether both ends of the packaging material are opened when the packaging material is unfolded, and there is no standardized test.

In the present invention, three pieces of 30 cm lengthwise and widthwise portions of the left and right sides of the packaging material were cut, and the changes with time were measured. The results were as shown in Table 2 below.

division Immediately after harvesting After 1 hour After 24 hours After 48 hours Example 1 1mm 1mm 2mm 2mm Example 2 1mm 1mm 2mm 2mm Example 3 1mm 1mm 2mm 3mm OPP barrier site 10mm 25mm 40mm 2 wheel jungle 400 mm 2 wheel jungle

The values shown in the table are measured from the height of the end of the packaging material at the bottom. The smaller the measured value is, the less the packaging material will curl.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments and that various changes and modifications may be made therein without departing from the spirit and scope of the invention. It will be understood by those of ordinary skill in the art that various changes and modifications may be made.

1. Fabric 2. Adhesive resin
3. Antirust agent 4. Antirust agent supply system
5. Input port 6. Supply regulator
7. Grinder 8. Mesh roll

Claims

A nonwoven fabric made of one selected from the group consisting of polyethylene and polypropylene;
A polymer resin 2 formed on one surface of the fabric 1 and made of the same raw material as the raw material constituting the fabric 1;
Characterized in that the rust preventive layer (3) is formed by thermally adhering a rust preventive composed of solid fine particle powder to one side of the polymer resin (2).

The method according to claim 1,
Characterized in that the rust inhibitor is milled into fine particles having a size in the range of 10 to 100 microns so that the rust inhibitor can be fed side by side through the rust inhibitor feeding device (4).

The method according to claim 1,
Wherein the rust inhibitor comprises 5 to 15% by weight of triazoles, 10 to 30% by weight of organic acid amine salts, 10 to 30% by weight of fatty acid amine salts, 5 to 50% by weight of alkaline earth metals and 1 to 10% , A vapor-proof rustproof packing material.

The method according to claim 1,
One of polyethylene (PE) resin and polypropylene (PP) resin is selected as the polymer resin 2, the molding temperature of the polymer resin 2 is in the range of 230 to 280 degrees, ) At a pressure of 3 kgf to 10 kgf and a coating layer of 20 to 40 袖 m thick on one surface of the fabric (1).

A rust preventive preparation step (S100) of crushing the rustproofing agent and processing the rust inhibitor into a predetermined particle size;
A material charging step S200 of charging the rust preventive agent 3 prepared in the preparation step through the rust preventive agent supply device 4 and charging the raw material 1 and the polymeric resin 2 together;
A polymer resin 2 having a viscosity by heat is bonded to the raw fabric 1 while thermally bonding the raw material through the material input step S200 so that the polymer resin 2 has a T-die (S300) in which a rust preventive agent is dispersed quantitatively and uniformly in a Ti-die system to one side of the polymer resin (2);
The anti-corrosive packaging material prepared through the rust preventive preparation step (S100), the material applying step (S200), and the thermal bonding step (S300) is subjected to a curling prevention step (S400) for preventing the curling phenomenon by adjusting the mechanical tension Wherein the method comprises the steps of:

6. The method of claim 5,
Wherein the rust inhibitor comprises 5 to 15% by weight of triazoles, 10 to 30% by weight of organic acid amine salts, 10 to 30% by weight of fatty acid amine salts, 5 to 50% by weight of alkaline earth metals and 1 to 10% By weight based on the total weight of the composition.

6. The method of claim 5,
The rust preventive agent supply device (4) includes a charging port (5) into which a rust preventive agent composed of solid fine particle powder is charged;
A supply regulator (6) installed at a lower portion of the charging port (5) for regulating the supply of the rust inhibitor to be injected through the charging port (5);
A crusher (7) installed at the lower part of the supply regulator (6) for crushing the rust inhibitor supplied through the supply regulator (6);
A mesh roll (5) installed at a lower portion of the crusher (7) and dispersed quantitatively and uniformly in the crusher (7) by a crusher (7) 8). &Lt; / RTI >

6. The method of claim 5,
The above-mentioned anticorrosive material supply device 4 is provided with a feeding range of 6 g / m 2 to 15 g / m 2 so as to uniformly distribute the rust inhibitor made of fine particles quantitatively uniformly through side feeding Wherein the method comprises the steps of: