KR101133182B1 - gunny bag manufacturing method coated volatile corrosion inhibitor resin - Google Patents

Abstract

The preparation method of coating the vaporized rust preventive resin of the present invention is a mixture by stirring and mixing sodium benzoate (Sodium Benzoate), sodium metasilicate, sodium molybdate (Sodium molibdate), benzotriazole and Natrasol (Natrasol) Mixing and stirring the polyethylene resin and the dispersant in a temperature range of 140 ° C to 160 ° C in the first mixture stirring step (S10) to form, the grinding step (S20) for grinding the mixture, and the mixture milled in the grinding step (S20) The second mixed stirring step (S30) to form a first rust-proof resin, and the second rust-proof resin by mixing and stirring a polyethylene resin, a polyolefin resin and a metal having a thermal conductivity of at least 200Kcal / mhr ℃ or more to the first rustproof resin It consists of a third mixing and stirring step (S40) to form a, and a coating step (S50) for coating the second anti-rust resin on the inner surface of the sack.

Hemp, Vaporization Antirust, Polyethylene Resin

Description

Gunny bag manufacturing method coated volatile corrosion inhibitor resin

The present invention relates to a method of manufacturing a sack coated with a vaporizable rust preventive resin, in particular to prevent the corrosion of products of iron or non-ferrous metals that are accommodated inside the sack is coated on the inner surface of the sack made of polypropylene material, The present invention relates to a method for preparing a sack coated with a vaporizing antirust resin that prevents environmental pollution by causing biochemical decomposition to occur rapidly and does not adversely affect human health.

As the products of various mechanical industries, automobiles, ships, and munitions using metal materials are developed, the demand for various packaging products is increasing. Among the packaging products for packaging ferrous or non-ferrous metal products, polypropylene is used. The sack made of material fiber yarn is mainly used.

In the conventional case, the anti-corrosive film formed of polyethylene resin mixed with chemicals of vinyl or nitrite or chromic acid is coated on the inner side of the sack using an adhesive at high temperature to prevent corrosion of metal products packaged on the sack, Used for waterproofing.

The stem made of vinyl, rustproof film and polypropylene fiber yarn coated on the inner side of the stem has a large molecular weight, has a large molecular chain structure, and does not cause decomposition in the natural environment during landfill for disposal. Carcinogens such as dioxins are produced during incineration without reclamation, causing air pollution and human damage.Nitrite (sodium nitrite) mixed for rust prevention can cause cancer when inhaled into the human body. It can be fatal, and chromic acid has various problems causing environmental pollution or adversely affecting the ecosystem.

An object of the present invention is to coat the inner surface of the scavenger with sodium benzoate, sodium metasilicate, sodium molybdenum, benzotriazole, natrazole, polyethylene resin, polyolefin resin, and a metal having high thermal conductivity, and then stored in the stool. Excellent anti-corrosive effect to prevent corrosion of metal products, and large metal chains of high molecular weight polyethylene resin and polypropylene are oxidatively decomposed into small molecular chains by metals with high thermal conductivity. It is possible to prevent, and to provide a method for producing a hemp coating coated vaporization anti-rust resin does not adversely affect human health.

In order to achieve the above object, the evaporation anticorrosive resin-coated hemp production method of the present invention is a hemp production method formed of polypropylene fiber yarn for packaging products of iron or non-ferrous metals, sodium benzoate, sodium metasilicate, A first mixing and stirring step of mixing and stirring sodium molybdate, benzotriazole and natrazole; Grinding of the mixture; A second mixing and stirring step of mixing and stirring the polyethylene resin and the dispersant at a temperature range of 140 ° C. to 160 ° C. to the mixture pulverized in the grinding step to form a first rustproof resin; A second anti-rust resin which oxidizes and decomposes the polypropylene and polyethylene resin with the metal by mixing and stirring the polyethylene resin, the polyolefin resin and the metal having a thermal conductivity of at least 200 Kcal / mhr ° C. to the first rust preventive resin. A third mixed stirring step of forming a; And a coating step of coating the second anti-rust resin on the inner surface of the sack, wherein the sodium benzoate is 0.5 parts by weight to 1.5 parts by weight and the sodium metasilicate is 0.1 parts by weight to 0.6 with respect to 1000 parts by weight of the polyethylene resin. Parts by weight, wherein the sodium molybdate is 1.2 parts by weight to 2 parts by weight, the benzotriazole is 0.5 parts by weight to 1.5 parts by weight, the natrazole is 0.3 parts by weight to 0.6 parts by weight, and the dispersant is 1 part by weight. Part to 1.5 parts by weight, the polyolefin resin is characterized in that 500 to 600 parts by weight.

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In addition, the metal is a copper metal, the particle size is 10nm ~ 800nm, the dispersing agent is characterized in that the zinc stearate.

According to the present invention, a method of preparing a sack coated with a vaporizable rustproof resin is an object of the present invention, in which a rustproof resin is mixed with sodium benzoate, sodium metasilicate, sodium molybdenum, benzotriazole, natrazole, polyethylene resin, polyolefin resin, and a metal having high thermal conductivity. Is coated on the inner side of the sack to prevent corrosion of metal products stored in the stalk, and to oxidize the large molecular chain of polyethylene resin and polypropylene with large molecular weight into small molecular chain by metal with high thermal conductivity. Biodegradation occurs quickly when decomposing disposal, and environmental pollution can be prevented.

Hereinafter, with reference to the accompanying drawings will be described in detail the manufacturing method of the evaporated anti-corrosion resin coated coating of the present invention.

1 is a process flow chart of the preparation method of coating the vaporized rust-proof resin of the present invention.

As shown in Figure 1, the preparation method of the coating of vaporized rust preventive resin of the present invention is sodium benzoate (Sodium Benzoate), sodium metasilicate, sodium molybdate (Sodium molibdate), benzotriazole (Benzotriazole) and natrazole (Natrasol 1 st mixing stir to form a mixture by mixing and stirring), a pulverizing step (S20) for pulverizing the mixture, and a mixture of the polyethylene resin and the dispersant in the pulverized mixture in the crushing step (S20) from 140 ℃ to 160 ℃ A second mixing and stirring step (S30) of mixing and stirring the first rust-preventing resin at a temperature range of 1 ° C., and a metal having a thermal conductivity of polyethylene resin, polyolefin resin and at least 200 Kcal / mhr ° C. in the first rust-preventing resin. Mixing and stirring to form a second mixed stirring step (S40) for oxidizing and decomposing polypropylene and polyethylene resins by metal at the time of disposal of the bed, and the second rust-preventing resin on the inner surface of the bed. The coating consists of a coating step (S50).

In addition, sodium benzoate is 0.5 parts by weight to 1.5 parts by weight, sodium metasilicate is 0.1 parts by weight to 0.6 parts by weight, sodium molybdate is 1.2 parts by weight to 2 parts by weight with respect to 1000 parts by weight of the polyethylene resin, and benzotria The sol is 0.5 parts by weight to 1.5 parts by weight, the natrazole is 0.3 parts by weight to 0.6 parts by weight, the dispersant is 1 part by weight to 1.5 parts by weight, and the polyolefin resin is comprised of 500 parts by weight to 600 parts by weight.

In addition, the metal is a copper metal, its particle size is 10nm ~ 800nm, the dispersant is formed of zinc stearate (Zinc Stearate).

In addition, the coating step is configured to coat the inner surface of the stem by direct injection method antirust resin.

The operation of the evaporative anti-corrosive resin coated hemp production method according to the above configuration is as follows.

As shown in FIG. 2, the first mixing stirring step S10 is 0.5 parts by weight to 1.5 parts by weight of sodium benzoate and 0.1 parts by weight to 0.6 parts by weight of metasilicate based on 1000 parts by weight of polyethylene resin, which is the main raw material of the film. Sodium, 1.2 parts by weight to 2 parts by weight of sodium molybdate, 0.5 parts by weight to 1,5 parts by weight of benzotriazole and 0.3 parts by weight to 0.6 parts by weight of Natrasol are placed in a stirrer, at 25 rpm / at room temperature. Mix and stir for 40 minutes at min rotation speed to form a mixture.

Sodium benzoate, sodium metasilicate, sodium molybdate and benzotriazole are all chemicals for anti-rust action, and when mixed below the proper weight, the rust resistance is reduced, and when the weight is higher than the proper weight, the rust resistance balance is broken and Blue may occur. These chemicals do not cause environmental pollution and do not harm human health.

Sodium metasilicate not only prevents rust, but also makes the pH neutral because it can cause rust if the pH is higher or lower than neutral.

Natrasol absorbs moisture that penetrates when the moisture penetrates from the outside of the rod to the inside, thereby significantly reducing the water permeability permeated into the rod.

In the grinding step S20, the first mixture is pulverized to a size of 500 mesh from 350 mesh.

The second mixing and stirring step S30 is 100 parts by weight of a low molecular weight polyethylene resin and 1 part by weight to 1.5 parts by weight of stearic acid having a melt index of 3 g / min to 4 g / min in the mixture pulverized in the grinding step S20. Zinc (zinc stearate) is mixed and stirred at a temperature range of 140 ℃ to 160 ℃ to form a first rust preventive resin.

The third mixed stirring step (S40) is 900 parts by weight of polyethylene resin, 500 parts by weight to 600 parts by weight of polyolefin resin and at least 200 Kcal / mhr ° C. in the first rust-preventing resin produced in the second mixing step (S30). The metal having thermal conductivity) is mixed and stirred in a stirrer to form a second antirust resin.

The metal is a metal having a thermal conductivity of at least 200 Kcal / mhr ° C. or more, and gold, silver, or copper may be used. Particularly, it is preferable to use copper, and the metal has a particle size of 10 nm to 800 nm. It is preferable to use a copper nano metal having.

Since the polyolefin resin has a higher tensile strength than the polyethylene resin, the tensile strength of the second rustproof resin formed by further mixing and stirring the polyethylene resin and the polyolefin resin in the first mixed stirrer step S40 in the third mixed stirring step (S40). Larger than that. Therefore, in the coating step (S50) of the post process, the physical properties of the second anti-corrosion resin is coated is increased compared to the conventional hemp.

In the coating step (S50), the second antirust resin is dissolved at a temperature of 190 ° C. to 195 ° C. using a hemp coating machine, and then the dissolved second antirust resin is coated on the inside of the hemp by direct injection. In the conventional case, since vinyl or an rustproof film was adhered to a sack by using an adhesive at a high temperature of 250 ° C. or higher, loss of rust-preventing agents occurs, and the anti-rust function is reduced. By coating the two rust preventive resins can prevent the rust preventive chemicals to be lost, and can facilitate the coating operation.

The evaporated anticorrosive resin coated sack of the present invention prepared as described above is mixed with the components of sodium benzoate, sodium metasilicate, sodium molybdate and benzotriazole, so that the storage of the vaporized rustproof resin of the present invention Corrosion can be prevented from products of ferrous or non-ferrous metals, and the copper nanometal having particle size of 10nm ~ 800nm is rapidly transferred and transferred from the surrounding natural environment when discarding the landfill. Biochemical decomposition occurs by oxidatively decomposing large molecular chains of polyethylene resin having a large molecular chain structure and polypropylene, which is a raw material of a large molecule, into small molecular chains by using the received heat, and thus, unlike conventional rods, incineration treatment is necessary. Therefore, no harmful substances are generated by incineration, and decomposition occurs quickly when landfilling, thus causing environmental pollution. It can prevent life.

Figure 2 is a graph showing the decomposition rate of the sack after forming a condition that the microorganisms can be activated in the temperature range of the vaporized anti-corrosive resin coating of the present invention 50 ℃, as can be seen in Figure 2 approximately 570 days When elapsed, the sack is biochemically decomposed about 70%, and after 700 days, the stool coated with the vaporizable rust preventive resin of the present invention is biochemically decomposed about 80%.

Table 1 below is a comparison result of the rust test for the metal specimens by receiving a variety of metal specimens in each of the vaporized anti-corrosive resin-coated hemp prepared by the present invention and a general polyethylene film-coated hemp Is shown.

Metal specimen Bed of the present invention General Carbon steel No call Partial call outbreak aluminum No call Some corrosion occurs Galvanized steel sheet No call Some corrosion occurs Copper No call Partial discoloration

In the comparison test shown in Table 1, the metal specimens were cut horizontally and vertically 3 cm, and then the surface of the cut metal specimens were uniformly sanded with aluminum oxide cloth, and then isopropyl alcohol. ) And then dried and put into a vaporized anticorrosive resin-coated hemp prepared in accordance with the present invention and a general hemp coated with polyethylene film and sealed with a heat sealer. The rust test was carried out to test whether the rust occurred by placing the metal specimens packed in the sack in a thermostat maintained at 50 ° C and kept at 50 ° C. After 72 hours, the metal specimens were opened.

As shown in Table 1, the evaporative anticorrosive resin coated sack according to the present invention can be seen that the rust phenomenon does not occur compared to the general sack, it can be confirmed that the anti-rust treatment is excellent.

Table 2 below is a result of measuring the moisture permeability of the gas-coated rustproof resin coated sack prepared by the present invention and the general polyethylene film-coated sack, the vaporized rustproof resin coated sack of the present invention is a general It can be seen that the moisture permeability is significantly lower than that.

Bed of the present invention General
Moisture Permeability (g / 24hrs, m ² )

1.4
1.9

1 is a process flow chart of the preparation method of the sack coated with vaporizable antirust resin of the present invention,

Figure 2 is a graph of the decomposition rate of the evaporated anticorrosive resin coated sack of the present invention.

Claims (4)

In the manufacturing method of the hemp formed of polypropylene fiber yarn for packaging products of ferrous or non-ferrous metals, A first mixing and stirring step of mixing and stirring sodium benzoate, sodium metasilicate, sodium molybdate, benzotriazole and natrazole to form a mixture; Grinding of the mixture; A second mixing and stirring step of mixing and stirring the polyethylene resin and the dispersant at a temperature range of 140 ° C. to 160 ° C. to the mixture pulverized in the grinding step to form a first rustproof resin; A second anti-rust resin which oxidizes and decomposes the polypropylene and polyethylene resin with the metal by mixing and stirring the polyethylene resin, the polyolefin resin and the metal having a thermal conductivity of at least 200 Kcal / mhr ° C. to the first rust preventive resin. A third mixed stirring step of forming a; And It is provided with a coating step of coating the second anti-rust resin on the inner surface of the sack, The sodium benzoate is 0.5 parts by weight to 1.5 parts by weight, the sodium metasilicate is 0.1 parts by weight to 0.6 parts by weight, and the sodium molybdate is 1.2 parts by weight to 2 parts by weight based on 1000 parts by weight of the polyethylene resin. The benzotriazole is 0.5 to 1.5 parts by weight, the natrazole is 0.3 to 0.6 parts by weight, the dispersing agent is 1 to 1.5 parts by weight, the polyolefin resin is 500 to 600 parts by weight A method of manufacturing a hemp coated coating characterized in that the vaporizing anti-rust resin. delete The method according to claim 1, wherein the metal is copper metal, the particle size is 10nm ~ 800nm, and the dispersant is zinc stearate zinc coated coating method according to claim. The method according to claim 1, wherein the coating step is a method for producing a vaporized rustproof resin-coated hemp characterized in that the coating on the inner surface of the stem by the direct injection method.

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