KR20220000005A - Manufacturing method of Aluminium vacuum packing material which has volatile corrosion inhibiting and Anti-static function - Google Patents

Abstract

A manufacturing method of a vacuum packing material with a volatile corrosion inhibiting function and an antistatic function comprises: a first mixing agitation step (S10) of mixing calcium benzoate, potassium sorbate, sodium caprylate, glyceryl monostearate, zinc oxide, and silicon dioxide to produce a volatile corrosion inhibitor; a second mixing agitation step (S20) of mixing and agitating polyethylene wax with MFR 50 or higher by ASTM D1238-13 in the volatile corrosion inhibitor to make spraying wax with volatile corrosion inhibition; and a third spray combining step (S30) of directly spraying the mixture formed in the second mixing agitation step between aluminum foil and a polyethylene woven sack in a temperature range of 110-120 degrees Celsius.

Description

Manufacturing method of Aluminum vacuum packing material which has volatile corrosion inhibiting and Anti-static function

The present invention relates to a method for manufacturing an aluminum packaging material for vacuum packaging having a vaporization rust prevention function and an antistatic function. In addition, it relates to the manufacture of vacuum anti-rust packaging material with added convenience of operation because it can directly prevent rust prevention without the anti-rust process and prevent damage to electronic parts due to static electricity during packaging, which is a disadvantage of existing vacuum packaging materials. .

In addition, by directly spraying the aluminum foil and sacks with polyethylene wax, the inconvenience of the conventional manufacturing process of laminating the anti-rust film to aluminum is eliminated. It is environmentally friendly because it does not use harmful benzotriazole, and also relates to a method for manufacturing a vacuum packaging material having excellent rust prevention properties because it does not cause deformation or change in physical properties of vaporizable rust inhibitors due to low working temperature.

As the production of various metal products using ferrous and non-ferrous metals increases with the development of industry, various packaging materials for transportation and storage of these products are being developed.

In particular, heavy and bulky products such as steel products and hot coils are woven with polypropylene, polyethylene, and polyethylene terephthalate (PET) materials, which have strong tensile and tear strength due to the characteristics of the product. Hemp sacks made of old fiber yarns are mainly used as packaging materials.

The conventional aluminum vacuum packaging material manufacturing method is to use an adhesive at high temperature to sack a rust preventive film formed of polyethylene resin or polypropylene resin mixed with chemicals such as vinyl, nitrite, amines or chromic acid. It was prepared by adhering to an aluminum foil.

As the prior art of vacuum packaging materials with a conventional rust prevention function,

1) Republic of Korea Patent Publication No. 2003659880000 "Vapourable anti-rust vacuum packaging material equipped with a see-through window (registration date: October 18, 2004),

2) Republic of Korea Patent Publication No. 1020110003117 "Vapourable rust-preventive packaging material with enhanced moisture permeation prevention function" (Registration date: 2011.01.12)

3) Republic of Korea Patent Publication No. 1010307780000 "Rust-preventive packaging material and manufacturing method using non-woven fabric made of polyethylene and hemp fabric" (registration date: 2011.4.15) is disclosed.

The conventional manufacturing method is a method of laminating a polyethylene film having a rust preventive function on sacks or aluminum foil, or a method of adding a rust preventive agent to an adhesive in the process of adhering sacks or OPP films to an aluminum foil. it was In particular, when a polyethylene film or OPP is laminated with an aluminum foil using an adhesive, the physical properties of the product do not have flexibility, so it is inconvenient that it cannot be applied to small packages such as electronic products. In addition, most of the drugs used as rust inhibitors contain nitrite salts or amines, so they are harmful to the human body. Also, benzotriazole is used to prevent rust of copper and metals, but benzotriazole is a material that does not biodegrade. However, as it adversely affects the ecosystem, it is registered as a REACH (Registration, Evaluation, Authorization & Restriction of Chemicals) regulatory preliminary substance in the European Union, so it is necessary to restrict its use.

In addition, in the conventional vaporizing rust preventive bag manufacturing method, the rust preventive resin is dissolved at a high temperature, and then the dissolved rust preventive resin is adhered to the cloth and aluminum foil. There is a problem with change.

1) Republic of Korea Patent Publication No. 2003659880000 "Vapourable anti-rust vacuum packaging material equipped with a see-through window (Registration date: October 18, 2004) 2) Republic of Korea Patent Publication No. 1020110003117 "Vapourable rust-preventive packaging material with enhanced moisture permeation prevention function" (Registration date: 2011.01.12) 3) Republic of Korea Patent Publication No. 1010307780000 "Rust-preventive packaging material and manufacturing method using non-woven fabric made of polyethylene and hemp fabric" (registration date: 2011.4.15) is disclosed.

The object of the present invention is to be eco-friendly because it does not use nitrites and amines harmful to the human body as a vaporizable rust preventive agent, does not use benzotriazole harmful to the ecosystem due to low biodegradability, and MFR according to ASTM D1238-13 is 50g/10min (190C .2.16kg) or higher is used and the number of threads is 4x4 or more per 6 square centimeters at low temperature (110-120 degrees Celsius), and the flexibility of the aluminum packaging material is increased by spraying directly onto the sack. To provide a vacuum packaging material manufacturing method that reduces the loss of rust prevention power, does not cause changes in the properties of hemp weave when laminated with aluminum, and has excellent vaporization and anti-rust function and anti-static function even for small packaging materials such as electronic products that require an anti-static function. have.

In order to achieve the above object, the production method of the present invention includes a first mixing and stirring step of mixing calcium benzoate, potassium sorbate, sodium capryate, glyceryl monostearate zinc oxide and silicon dioxide to produce a vaporizable rust preventive agent; a second mixing and stirring step of mixing and stirring the vaporizing rust preventive agent with a polyethylene wax having an MFR of 50 or more to make a lamination wax having a vaporizable rust preventive agent; It is characterized in that it comprises a third spraying paper step of directly spraying between the aluminum foil and the polyethylene sack in the mixing temperature range of 110 to 120 degrees Celsius formed in the second mixing and stirring step.

In addition, in the antirust wax mixture of the second mixing step, the calcium benzoate is 50 to 100 parts by weight with respect to 1000 parts by weight of the polyethylene resin wax, the potassium sorbate is 30 to 50 parts by weight, and sodium caprate is 50 to 100 parts by weight, glyceryl monostearate is 100 to 150 parts by weight, zinc oxide is 30 to 50 parts by weight, silicon dioxide is characterized in that 30 to 50 parts by weight.

polyethylene wax. MFR according to ASTM D1238-13 is 50g/10min (190C.2.16kg) or more, and the impregnation sack is characterized in that the number of polyethylene threads per 6 square centimeters is 4x4 or more.

The effect of the present invention is eco-friendly because it does not use nitrites and amines harmful to the human body as a rust preventive agent, does not use benzotriazole harmful to the ecosystem due to its low biodegradability, and MFR according to ASTM D1238-13 is 50g/10min (190C. 2.16kg) or more, it is sprayed directly between the sack and aluminum foil with a number of threads of 4x4 or more per 6 square centimeters at low temperature to increase the flexibility of the aluminum packaging material and to laminate at a low temperature to reduce the loss of rust preventive power of vaporizable rust preventives. In addition, when laminated with aluminum, there is no change in the physical properties of hemp weave and it has an anti-static function, so it is possible to provide a vacuum packaging material with anti-rust and anti-static functions even for small packaging of ferrous and non-ferrous metals and electronic products.

1 is a process flow diagram of a method for manufacturing a vacuum packaging material having a rust preventive function according to the present invention.
Figure 2 is a rust generation rating table showing the degree of corrosion according to the rust generation grade for mild steel and carbon steel.

Hereinafter, with reference to the accompanying drawings, the vacuum packaging material having a rust preventive function of the present invention

The manufacturing method will be described in detail.

As shown in Figure 1, the manufacturing method of the present invention is

Calcium benzoate, potassium sorbate, sodium capryate, glyceryl monostearate, zinc oxide and silicon dioxide are mixed to produce a vaporizable rust inhibitor in the first mixing and stirring step (S10)

A second mixing and stirring step (S20) of mixing and stirring the vaporizing rust preventive agent with polyethylene wax having an MFR of 50 or more to produce a laminating wax having a vaporizable rust preventive agent; It consists of a third laminating step (S30) of spraying and laminating the mixture formed in the second mixing and stirring step on an aluminum foil and a polyethylene sack in a temperature range of 110 to 120 degrees Celsius.

In addition, in the antirust wax mixture of the second mixing step, the calcium benzoate is 50 to 100 parts by weight with respect to 1000 parts by weight of the polyethylene resin wax, the potassium sorbate is 30 to 50 parts by weight, and the sodium caprate is 50 to 100 parts by weight, glyceryl monostearate is 100 to 150 parts by weight, zinc oxide is 30 to 50 parts by weight, silicon dioxide is composed of 30 to 50 parts by weight.

polyethylene wax. MFR according to ASTM D1238-13 should be 50g/10min (190C.2.16kg) or more, and for impregnation sacks, use 4x4 or more of polyethylene threads per 6 square centimeters.

The operation of the manufacturing method of the present invention according to the above configuration is as follows.

As shown in FIG. 1, the first mixing and stirring step (S10) is a step of preparing a rust preventive agent.

With respect to 1000 parts by weight of calcium benzoate, the potassium sorbate is 300 to 500 parts by weight, sodium caprylate is 500 to 700 parts by weight, and the glyceryl monostearate is 500 to 750 parts by weight zinc oxide is 100 to 150 parts by weight. Silicon dioxide consists of 100 to 150 parts by weight

Calcium benzoate, glyceryl monostearate, potassium sorbate, zinc oxide and silicon dioxide are used as edible food additives and are harmless to the human body. So, sodium caprate contributes to rust prevention of ferrous metals relatively than non-ferrous metals, and potassium sorbate contributes to rust prevention of non-ferrous metals relatively compared to ferrous metals,

Calcium benzoate and zinc oxide contribute to preventing contact corrosion of ferrous and non-ferrous metals, glycerol monostearate is used as an antistatic agent, and silicon dioxide is added for use as a moisture absorbent.

As described above, calcium benzoate, sodium caprate, potassium sorbate, and zinc oxide are all for rust prevention of ferrous and non-ferrous metals. It can promote rust prevention by breaking the balance of rust prevention properties, and the phenomenon of fading occurs when heat-sealing the packaging material.

In the second mixing and stirring step (S20), 1000 parts by weight of polyethylene wax is mixed and stirred with 200 to 300 parts by weight of the rust preventive agent configured as described above to form a mixture.

If the antirust agent is less than the appropriate weight, the antirust performance and static electricity performance do not come out properly.

In the third spray lamination step (S30), the mixture formed in the second mixing and stirring step (S20) is laminated by spraying 10 to 20 grams per square meter between the aluminum foil and the polyethylene sack at a temperature range of 110 to 120 degrees Celsius.

By spraying the waxed rust inhibitor at a low temperature of 110 to 120 degrees Celsius, the rust preventive components are evenly dispersed and adhered during lamination, the loss of the rust preventive power of the rust inhibitor is small, and the product can be manufactured without changing the physical properties of hemp weaving due to the change in the physical properties of the rust preventive agent. have.

In order to measure the rust prevention test according to the chemical composition ratio of the rust preventive agent manufactured by the present invention, each sample was prepared as follows.

sample 1

To 1000 parts by weight of polyethylene wax, 20 parts by weight of calcium benzoate and 20 parts by weight of potassium sorbate, 20 parts by weight of sodium caprylate, 20 parts by weight of glyceryl monostearate and 20 parts by weight of zinc oxide and 20 parts by weight of silicon dioxide at 25 degrees Celsius Using a mixer, mix at 300 RPM/min for 10 minutes to prepare a rust-preventing mixture

sample 2

To 1000 parts by weight of polyethylene wax, 50 parts by weight of calcium benzoate and 50 parts by weight of potassium sorbate, 50 parts by weight of sodium caprate, 50 parts by weight of glyceryl monostearate, and 50 parts by weight of zinc oxide 50 parts by weight of silicon dioxide at 25 degrees Celsius Using a mixer, mix at 300 RPM/min. for 10 minutes to prepare a rust-preventing mixture

sample 3

1000 parts by weight of polyethylene wax 100 parts by weight of calcium benzoate and 70 parts by weight of potassium sorbate 50 parts by weight of sodium caprate, 100 parts by weight of glyceryl monostearate and 50 parts by weight of zinc oxide 50 parts by weight of silicon dioxide Using a mixer, mix at 300 RPM/min. for 10 minutes to prepare a rust-preventing mixture

sample 4

100 parts by weight of calcium benzoate, 70 parts by weight of potassium sorbate, 100 parts by weight of sodium caprate, 100 parts by weight of glyceryl monostearate, 50 parts by weight of zinc oxide and 50 parts by weight of silicon dioxide to 1000 parts by weight of polyethylene wax Using a mixer, mix at 300 RPM/min. for 10 minutes to prepare a rust-preventing mixture

sample 5

1000 parts by weight of polyethylene wax 100 parts by weight of calcium benzoate and 100 parts by weight of potassium sorbate 100 parts by weight of sodium caprate, 100 parts by weight of glyceryl monostearate and 50 parts by weight of zinc oxide 50 parts by weight of silicon dioxide Using a mixer, mix at 300 RPM/min. for 10 minutes to prepare a rust-preventing mixture

Table 1 below shows the results of the rust prevention test for the rust preventive mixture of Samples 1 to 5.

○: No rust

X: Rust

△: Rust within 5%

The rust prevention comparison experiment shown in Table 1 is performed using LUCITE in 1000ML JAR after mounting on each metal rubber stopper of carbon steel (DIN EN 10025), copper (T3), brass (H62), and aluminum (LY12). After placing, install with a rubber stopper equipped with each specimen, set at room temperature (23 degrees +/- 2 degrees Celsius) for 20 hours, add 30 ml of distilled water, and then place at room temperature for 2 hours, then place in a constant temperature bath at 50 degrees Celsius for 2 hours, and observe the rusting state. did.

As can be seen from Table 1 above, in the case of Sample 1, the anti-rust effect on all carbon steel, copper, brass and aluminum is not good, and in the case of the vaporizable anti-rust sack of Sample 2, the anti-rust effect on carbon steel, copper, and brass is insignificant, but the rust-preventive effect on aluminum is insignificant. It is effective.

In the case of Sample 3, Sample 4, and Sample 5, it can be seen that the anti-rust effect is good on carbon steel and all metals.

Therefore, it can be seen that when the antirust agent has a mixing ratio of at least 70 parts by weight or more with respect to 1000 parts by weight of the polyethylene wax, the antirust effect is equally excellent for ferrous and non-ferrous metals.

Table 2 below shows that 15 grams of the anti-rust mixture of Samples 1 to 5 was sprayed between the aluminum foil and hemp fabric at 115 degrees Celsius for 1 square meter of each 1 square meter of aluminum foil and hemp fabric (number of threads: 12 per 6 cm square meter) and laminated. The comparative results of the rust prevention test on mild steel for one package are shown.

In the anti-rust experiment shown in Table 2, each of the anti-rust packaging materials of Samples 1 to 5 was cut to a size of 2.5 cmx15 cm, two of them were mounted in a 1000 ml Erlenmeyer flask, and a mild steel specimen was assembled with a rubber stopper, and the After leaving at room temperature of 21 to 25 degrees for 20 hours, 10 ml of a solution of glycerol (GLYCEROL) and distilled water in a 1:2 ratio was added, and after 2 hours, it was placed in a thermostat at 40 degrees Celsius, and after 2 hours, rust was observed. to be.

From Table 2, it can be seen that the rust-preventive packaging materials of Samples 4 and 5 have a good rust-preventing effect.

In other words. As shown in the rust generation grade table showing the degree of corrosion according to the rust generation grade of FIG. 2, the grade 0 in the rust generation grade means a grade when 30% or more of corrosion occurs, and grade 1 is It means a grade when corrosion of 5-30% occurs, grade 2 means a grade when corrosion occurs less than 5%, and grade 3 means a grade when corrosion does not occur at all.

Table 3 below shows the results of the rust prevention test on carbon steel for the experimental sample of Experiment 2. DIN EN 10025 was used for the carbon steel specimen.

In the rust prevention experiment shown in Table 3, as in Experiment 2, each sample rust prevention packaging material was cut into a size of 2.5cmx15cm, and two were mounted in a 1000ml Erlenmeyer flask. Assemble a carbon steel specimen (DIN EN-10025) to a rubber stopper, leave it for 20 hours at a room temperature of 21 to 25 degrees Celsius, and then add 10 ml of a solution of glycerol (GLYCEROL) and distilled water in a 1:2 ratio, and after 2 hours This is the result of putting it in a thermostat at 40 degrees Celsius and observing whether rust occurs after 2 hours.

From Table 3, it can be seen that sample 5 has the best anti-rust effect.

Table 4 below shows the comparative results of the rust prevention tests on copper (T3) and brass (H62) by the contact test method for samples 1 to 5 used in Experiment 2.

○: No rust

X: Rust

△: Rust within 5%

In the rust prevention comparison experiment shown in Table 4, copper and brass metal specimens (5cmx5cm) were sealed and packaged with each of the prepared rust prevention packaging materials of Samples 1 to 5 in a 500ml beaker, and then mounted using Lucite. After that, 30 ml of distilled water was added, sealed, and left in an oven at 60 degrees Celsius for 120 hours, and then rust was observed.

As can be seen from Table 4, it can be seen that partial rusting occurs in copper and brass in Sample 1, and Samples 2 to 5 have good rust prevention ability in copper and brass.

As can be seen from the rust prevention experiments according to Tables 1 to 4, the vaporizable rust preventive packaging material prepared according to the present invention is impregnated with aluminum foil and sack by mixing a rust preventive agent in a ratio of at least 400 parts by weight or more to 1000 parts by weight of polyethylene wax. One of them has an excellent anti-rust effect.

The following table shows the antistatic effect according to the spray amount per square meter of the anti-rust mixture of Experiment 1 on the hemp surface of Sample 5 used in Experiment 2 using a surface resistance meter (SUPRA model: 385).

As a result of the measurement, it can be confirmed that the surface sprayed with more than 10g per square meter has an antistatic function.

Claims (4)

Calcium benzoate, potassium sorbate, sodium caprylate, glyceryl monostearate, zinc oxide and silicon dioxide are mixed to produce a vaporizable rust preventive agent in the first mixing and stirring step (S10)
A second mixing and stirring step (S20) of mixing and stirring the vaporization rust preventive agent with a polyethylene wax having an MFR 50 or higher according to ASTM D1238-13 to make a wax for lamination having a vaporization rust preventive agent; A method of manufacturing a vacuum packaging material having anti-rust performance comprising the third spray lamination step (S30) of directly spraying the mixture formed in the second mixing and stirring step between the aluminum foil and the polyethylene hemp in a temperature range of 110 to 120 degrees Celsius According to claim 1, wherein the rust-preventive component,
, The calcium benzoate is 50 to 100 parts by weight with respect to 1000 parts by weight of the polyethylene resin wax, the potassium sorbate is 30 to 50 parts by weight, and the sodium caprate is 50 to 100 parts by weight and the glyceryl monostearate The rate is 100 to 150 parts by weight, zinc oxide is 30 to 50 parts by weight, and silicon dioxide is 30 to 50 parts by weight. The method of claim 1, wherein the polyethylene resin has an MFR of 50g/10min>(190 degrees/2.16Kg) or more according to ASTM D1238-13. The method according to claim 1, wherein glyceryl monostearate is mixed with polyethylene wax in a ratio of 10:1 and used as an antistatic agent.

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