KR102192501B1 - Manufacturing method of corrugated pad which has anti-rust function and anti static function - Google Patents

Abstract

In the method of manufacturing a rust-preventing corrugated cardboard pad with antistatic function of the present invention, a liquid rust inhibitor is prepared by mixing and stirring distilled water, octanoic acid, sodium benzoate, and linear alkylbenzene sulfonate. Forming a liquid rust inhibitor forming step (S10) and a mixture of glycerol mono stearate, polypropylene glycol, and water soluble acrylic resin are mixed and stirred to form a mixture with the liquid rust inhibitor. It consists of a mixing and stirring step (S20), and an impregnation step (S30) of impregnating the mixture into the cardboard pad by an impregnator.
The anti-static corrugated cardboard pad manufacturing method of the present invention configured as described above uses vaporizable rust inhibitors composed of a water-soluble liquid to prevent the generation of dust or fine dust when manufacturing the rust-resistant corrugated cardboard pad, and reduce the health damage of workers. It does not cause air pollution, does not use nitrites and amines that are harmful to the human body, and does not use benzotriazole, which is harmful to the ecosystem due to its low biodegradability and is harmful to the human body when in contact with skin, does not cause environmental pollution, and does not cause environmental pollution. It can prevent corrosion of flow.

Description

Manufacturing method of corrugated pad which has anti-rust function and anti static function}

The present invention relates to a method of manufacturing a rust-resistant corrugated cardboard pad having an anti-static function, and in particular, by using an anti-static agent composed of a food additive that is harmless to the human body, it prevents the occurrence of static electricity during product packaging to prevent damage to the packaging parts, and the operator's work It does not use nitrites and amines that are harmful to the human body, and is harmful to the ecosystem due to its low biodegradability, and does not cause environmental pollution because it does not use benzotriazole, which is harmful to the human body when in contact or inhalation. When mixing and agitating the formation of a vaporizable rust inhibitor using a vaporizable rust inhibitor, it prevents the generation of dust or fine dust, reduces the health damage of workers, and does not cause air pollution. The present invention relates to a method of manufacturing a rust-resistant corrugated cardboard pad having an excellent anti-static function.

As the industry develops, the production of various metal products using ferrous and non-ferrous metals is increasing, but industrial losses due to corrosion and static electricity generated during packaging of these products are increasing.

In order to prevent the occurrence of corrosion of these metal products, rust prevention oil, grease, paint, etc. were used, vacuum packaging, or vaporizable rust prevention products such as vaporizable rust prevention paper, rust prevention pad, and vaporizable rust prevention film were used.

Corrugated cardboard pads are widely used as packaging materials to prevent damage due to mutual contact of parts during export packaging of automobiles or mechanical parts.

Conventional rust-preventing corrugated cardboard is manufactured by mixing a vaporizable rust inhibitor with an adhesive, or by coating a vaporizable rust preventive solution on the surface of the corrugated board.

As the prior art of the conventional anti-corrosive corrugated cardboard, Korean Patent Publication No. 10-0809266 "Method for manufacturing vaporizable anti-corrosive corrugated cardboard" (announced date: 2008.03.03) and Korean Registered Patent No. 10-1225087 "Reinforced vaporizable waterproof anti-rust Corrugated cardboard and its manufacturing method" (announcement date: 2013.01.22) and Korean Laid-Open Patent Publication No. 10-2012-0079643 "corrugated cardboard and its manufacturing method" (published date: 2012.07.13) are disclosed.

In the case of the conventional corrugated cardboard, which is a prior art, sodium nitrite and benzotriazol are used as vaporizable rust inhibitors.

Sodium nitrite is classified as a harmful substance because it can generate nitrosoamine, a carcinogen when inhaled and ingested, and harmfulness to the human body continues to rise.

Benzotriazole is a substance that does not biodegrade and has an adverse effect on the ecosystem, so it is registered as a preliminary substance under the European Union's REACH (Registration, Evaluation, Authorization & Restriction of Chemicals), and is harmful to humans when inhaled or in contact with skin. It is necessary to limit its use.

In addition, the conventional anti-corrosive corrugated pad does not have an anti-static function, so when packing mechanical parts using the anti-corrosive corrugated pad, the parts are damaged due to static electricity, or the worker has a problem of causing inconvenience during packaging work. have.

Republic of Korea Patent Publication No. 10-0809266 "Method for manufacturing vaporizable rust-proof corrugated cardboard" (announcement date: 2008.03.03) Republic of Korea Patent Publication No. 10-1225087 "Vapable waterproof anti-rust reinforced corrugated cardboard and its manufacturing method" (announcement date: 2013.01.22) Republic of Korea Patent Publication No. 10-2012-0079643 "Anti-corrosive corrugated cardboard and its manufacturing method" (Publication date: 2012.07.13)

An object of the present invention is to prevent the generation of static electricity during product packaging by using an antistatic agent composed of food additives that are harmless to the human body to prevent damage to packaging parts, increase the workability of workers, and increase productivity, and nitrite harmful to the human body And no amines, low biodegradability, harmful to the ecosystem, and no benzotriazole, which is harmful to the human body during skin contact and inhalation, does not cause environmental pollution, and is environmentally friendly, using a vaporizable rust inhibitor consisting only of liquid. Anti-corrosive corrugated cardboard with anti-static function with excellent anti-static function without causing air pollution, preventing generation of dust or fine dust, etc., preventing the occurrence of dust or fine dust, etc. It is to provide a method of manufacturing a pad.

In order to achieve the above object, the method of manufacturing a rust-preventing corrugated cardboard pad having an antistatic function of the present invention comprises: forming a liquid rust inhibitor by mixing and stirring distilled water, octanoic acid, sodium benzoate, and linear alkylbenzene sulfonate to form a liquid rust inhibitor; A mixing and stirring step of forming a mixture by mixing and stirring glycerol monostearate, polypropylene glycol, and water-soluble acrylic resin with the liquid rust inhibitor; And an impregnation step of impregnating the mixture into a cardboard pad by an impregnator, wherein the mixture includes 20 parts by weight to 70 parts by weight of the octanoic acid, and 80 parts by weight to 120 parts by weight of the sodium benzoate based on 1000 parts by weight of the distilled water. Parts by weight, the linear alkylbenzene sulfonate is 20 parts by weight to 70 parts by weight, the glycerol mono stearate is 10 parts by weight to 50 parts by weight, the polypropylene glycol is 10 parts by weight to 20 parts by weight, The water-soluble acrylic resin is characterized in that 40 parts by weight to 70 parts by weight.

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The anti-corrosive corrugated cardboard pad manufacturing method having an electrostatic function of the present invention uses an antistatic agent composed of food additives that are harmless to the human body to prevent static electricity from being generated during product packaging, thereby preventing damage to the packaging parts, and increasing the workability of the operator to increase productivity. It does not use nitrites and amines that are harmful to the human body, and does not use benzotriazole, which is harmful to the ecosystem due to its low biodegradability, and does not cause environmental pollution because it does not use benzotriazole, which is harmful to the human body when in contact or inhalation. When mixing and stirring the formation of a vaporizable rust inhibitor using the formed vaporizable rust inhibitor, the pulverization process is not required to prevent the generation of dust or fine dust, reduce the health damage of workers, and do not cause air pollution, ferrous and nonferrous metals It can prevent corrosion of flow.

1 is a process flow chart of a method of manufacturing a rust-resistant corrugated cardboard pad having an antistatic function of the present invention.
2 is a rust generation grade 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 will be described in detail a method of manufacturing a rust-resistant corrugated cardboard pad having an antistatic function of the present invention.

As shown in Figure 1, the method of manufacturing a rust-resistant corrugated cardboard pad having an antistatic function of the present invention includes distilled water, octanoic acid, sodium benzoate, and linear alkylbenzene sulfonate (Linear Alkyl Benzene Sulfonate). A liquid rust inhibitor forming step (S10) of mixing and stirring to form a liquid rust inhibitor, and glycerol mono stearate, polyprophylene Glycol, and water soluble acrylic resin in the liquid rust inhibitor. It consists of a mixing and stirring step (S20) of mixing and stirring to form a mixture, and an impregnation step (S30) of impregnating the mixture into a cardboard pad by an impregnator.

In addition, the mixture is 20 to 70 parts by weight of octanoic acid, 80 to 120 parts by weight of sodium benzoate, and 20 to 70 parts by weight of linear alkylbenzene sulfonate, based on 1000 parts by weight of distilled water, glycerol Mono stearate is 10 to 50 parts by weight, polypropylene glycol is 10 to 20 parts by weight, and the water-soluble acrylic resin is composed of 40 to 70 parts by weight.

The operation of the method of manufacturing a rust-resistant corrugated cardboard pad having an antistatic function according to the present invention according to the above configuration is as follows.

As shown in Fig. 1, the liquid rust inhibitor forming step (S10) includes 20 parts by weight to 70 parts by weight of octanoic acid, 80 parts by weight to 120 parts by weight of sodium benzoate, and 20 parts by weight to 70 parts by weight based on 1000 parts by weight of distilled water. Negative linear alkylbenzene sulfonate is mixed and stirred to form a vaporizable liquid rust inhibitor consisting only of a liquid.

In other words, octanoic acid, sodium benzoate, and linear alkylbenzene sulfonate are all water-soluble and do not generate dust or fine dust when mixed and stirred in a liquid form, and they are all used as food additives or household detergent ingredients. Harmless

Octanoic acid, sodium benzoate, and linear alkylbenzene sulfonate are used as rust inhibitors, and octanoic acid contributes to rust prevention of ferrous metals relatively more than nonferrous metals, and sodium benzoate contributes to rust prevention of nonferrous metals relatively compared to ferrous metals. And, linear alkylbenzene sulfonate contributes to preventing contact corrosion of iron and non-ferrous metals.

As described above, octanoic acid, sodium benzoate and linear alkylbenzene sulfonate are all for rust prevention of iron and non-ferrous metals, and when formed below the appropriate weight, the rust prevention power decreases, and when it is larger than the appropriate weight, the balance of rust prevention This can lead to breakage and promote rust.

The mixing and stirring step (S20) includes 10 parts by weight to 50 parts by weight of glycerol monostearate, 10 parts by weight to 20 parts by weight of polypropylene glycol, based on 1000 parts by weight of distilled water in the liquid rust inhibitor formed in the rust inhibitor forming step (S10). , 40 to 70 parts by weight of a water-soluble acrylic resin is mixed and stirred at 80° C. to form a mixture.

Polypropylene glycol is a liquid form, and is a dispersant that enables smooth mixing and stirring when a liquid rust inhibitor, glycerol monostearate, and a water-soluble acrylic resin are mixed and stirred.

Glycerol mono stearate is an antistatic agent, and when it is lower than the appropriate weight, it cannot prevent the generation of static electricity, and even when it is more than the appropriate weight, it cannot prevent the generation of static electricity.

The water-soluble acrylic resin has the effect of increasing the strength of the corrugated cardboard pad, and when it is less than the appropriate weight, the strength of the corrugated cardboard pad is not good, and when it is more than the appropriate weight, the impregnation action is not smooth in the post-process impregnation step (S30). do.

In the impregnation step (S30), the mixture formed in the mixing and stirring step (S20) is impregnated with 20g of the mixture formed in the mixing and stirring step (S20) per 1 ㎡ of the corrugated cardboard pad using an impregnator to prepare a rust-resistant corrugated cardboard pad having an antistatic function.

Each sample was prepared as follows in order to measure the rust prevention experiment according to the composition ratio of the anti-static corrugated cardboard pad manufactured by the present invention.

Sample 1

Only 70 g of octanoic acid was used as the liquid rust inhibitor, and after forming a liquid rust inhibitor by mixing 70 g of octanoic acid with 1000 g of distilled water, 50 g of glycerol monostearate, 10 g of polypropylene glycol, and 70 g of A water-soluble acrylic resin is mixed at a high speed for 20 minutes at a temperature of 80° C. to form a mixture, and 20 g of the mixture is impregnated into 1 m 2 of a corrugated cardboard pad using an impregnator to prepare an anti-static corrugated cardboard pad.

Sample 2

After mixing and stirring 70 g of octanoic acid and 30 g of linear alkylbenzene sulfonate in 1000 g of distilled water to form a liquid rust inhibitor, 50 g of glycerol monostearate, 10 g of polypropylene glycol, and 70 g of water-soluble acrylic resin in the liquid rust inhibitor The mixture was mixed at high speed for 20 minutes at a temperature of 80° C. to form a mixture, and 20 g of the mixture was impregnated into 1 m 2 of a corrugated cardboard pad using an impregnator to prepare an anti-static corrugated cardboard pad.

Sample 3

After mixing and stirring 70 g of octanoic acid and 70 g of linear alkylbenzene sulfonate in 1000 g of distilled water to form a liquid rust inhibitor, 50 g of glycerol monostearate, 10 g of polypropylene glycol, and 70 g of water-soluble acrylic resin in the liquid rust inhibitor The mixture was mixed at high speed for 20 minutes at a temperature of 80° C. to form a mixture, and 20 g of the mixture was impregnated into 1 m 2 of a corrugated cardboard pad using an impregnator to prepare an anti-static corrugated cardboard pad.

Sample 4

After mixing and stirring 50 g of octanoic acid and 80 g of sodium benzoate in 1000 g of distilled water to form a liquid rust inhibitor, 50 g of glycerol monostearate, 10 g of polypropylene glycol, and 70 g of water-soluble acrylic resin were added to the liquid rust inhibitor. A mixture is formed by high-speed mixing at 80°C for 20 minutes, and 20 g of the mixture is impregnated into 1 m 2 of a corrugated cardboard pad using an impregnator to prepare a rust-preventing corrugated cardboard pad with antistatic function.

Sample 5

After mixing and stirring 70 g of octanoic acid, 120 g of sodium benzoate, and 50 g of linear alkylbenzene sulfonate in 1000 g of distilled water to form a liquid rust inhibitor, 50 g of glycerol monostearate and 10 g of polypropylene glyceride were added to the liquid rust inhibitor. Cole and 70g of water-soluble acrylic resin are mixed at 80℃ for 20 minutes at high speed to form a mixture, and 20g of the mixture is impregnated in 1㎡ of corrugated cardboard pad using an impregnator to prepare anti-static corrugated cardboard pad with antistatic function. .

Sample 6

After mixing and stirring 70 g of octanoic acid, 70 g of sodium benzoate, and 20 g of linear alkylbenzene sulfonate in 1000 g of distilled water to form a liquid rust inhibitor, 50 g of glycerol monostearate and 10 g of polypropylene glyceride were added to the liquid rust inhibitor. Cole and 70g of water-soluble acrylic resin are mixed at 80℃ for 20 minutes at high speed to form a mixture, and 20g of the mixture is impregnated in 1㎡ of corrugated cardboard pad using an impregnator to prepare anti-static corrugated cardboard pad with antistatic function. .

Sample 7

After mixing and stirring 10 g of octanoic acid, 10 g of sodium benzoate, and 70 g of linear alkylbenzene sulfonate in 1000 g of distilled water to form a liquid rust inhibitor, 50 g of glycerol monostearate and 10 g of polypropylene glyceride were added to the liquid rust inhibitor. Cole and 70g of water-soluble acrylic resin are mixed at 80℃ for 20 minutes at high speed to form a mixture, and 20g of the mixture is impregnated in 1㎡ of corrugated cardboard pad using an impregnator to prepare anti-static corrugated cardboard pad with antistatic function. .

Sample 8

After mixing and stirring 10 g of octanoic acid, 60 g of sodium benzoate, and 50 g of linear alkylbenzene sulfonate in 1000 g of distilled water to form a liquid rust inhibitor, 50 g of glycerol monostearate and 10 g of polypropylene glyceride were added to the liquid rust inhibitor. Cole and 70g of water-soluble acrylic resin are mixed at 80℃ for 20 minutes at high speed to form a mixture, and 20g of the mixture is impregnated in 1㎡ of corrugated cardboard pad using an impregnator to prepare anti-static corrugated cardboard pad with antistatic function. .

Table 1 below shows the results of a rust-proof test of the rust-resistant corrugated cardboard pads according to Samples 1 to 8.

Sample film / metal type Carbon steel Copper brass aluminum Sample 1 ○ Ⅹ Ⅹ Ⅹ Sample 2 ○ Ⅹ Ⅹ Ⅹ Sample 3 ○ △ △ △ Sample 4 △ △ △ △ Sample 5 ○ ○ ○ ○ Sample 6 ○ △ △ ○ Sample 7 △ △ △ △ Sample 8 △ △ ○ ○

○: No rust, Ⅹ: rust, △: within 5% of rust

In the anti-corrosive experiments shown in Table 1, 30 ml of distilled water was added to a 1000 ml beaker, and each of carbon steel, copper, brass, and aluminum packaged with an anti-corrosive corrugated cardboard pad made of 8 cmx10 cm samples 1 to 8 using lucite. This is a result of observing whether or not the metal specimens are rusted after 12 cycles of 1 cycle at 40°C for 16 hours at 21°C to 25°C after 8 hours at room temperature of 21°C to 25°C.

As can be seen from Table 1, in the case of the rust-resistant corrugated cardboard pads of Samples 1 and 2, it can be seen that carbon steel has good rust prevention effect, but non-ferrous metals do not have rust prevention effect, and in the case of Sample 3, carbon steel has good rust prevention effect, but non-ferrous metals It can be seen that Ryu has a slight rust prevention effect, and in the case of Sample 4, it can be seen that there is a slight rust prevention effect on all metals.

In the case of Sample 5, it can be seen that there is an excellent rust prevention effect for all metals.

In the case of Sample 6, carbon steel and aluminum have excellent anti-corrosive effect, but copper and brass have a slight anti-corrosive effect, and in the case of Sample 7, it can be seen that there is a slight anti-corrosive effect on all metals. It can be seen that aluminum has excellent anti-rust effect, but carbon steel and copper have some anti-rust effect.

Accordingly, it can be seen that the rust-preventing corrugated cardboard pad of Sample 5 prepared according to the present invention is excellent in rust-preventing effect when used for ferrous and non-ferrous metals.

Table 2 below shows the comparative results of the rust-proof test for mild steel using the rust-proof corrugated cardboard pads prepared by Samples 1 to 8.

Sample film Rust generation grade Sample 1 Grade 3 Sample 2 Grade 3 Sample 3 Grade 3 Sample 4 Grade 1 Sample 5 Grade 3 Sample 6 Grade 3 Sample 7 Grade 1 Sample 8 Grade 2

In the anti-corrosive experiments shown in Table 2, each of the anti-corrosive corrugated cardboard pads of Samples 1 to 8 were cut into a size of 2.5 cmx15 cm, and two anti-corrosive corrugated cardboard pads were mounted in a 1000 ml Erlenmeyer flask, and a mild steel specimen was attached to a rubber stopper. After assembling and leaving for 20 hours at room temperature at 21°C to 25°C, 10 ml of a solution of 1:2 mixture of glycerol and distilled water was added, and after 2 hours, placed in a thermostat at 40°C, after 2 hours This is the result of observing whether there is rust.

In Table 2, the rust-resistant corrugated cardboard pads of Sample 1, Sample 2, Sample 3, Sample 5 and Sample 6 all have a rust generation grade of Grade 3, and both Sample 4 and Sample 7 have a rust generation grade of Grade 1, It can be seen that Sample 8 has a grade of rust generation.

That is, as shown in the rust generation grade table showing the degree of corrosion according to the rust generation grade of FIG. 2, the rust generation grade of grade 0 means the grade in the case of more than 30% corrosion, and the grade 1 is 5 It means the grade in case of ～30% corrosion, grade 2 means the grade if corrosion occurs below 5%, and grade 3 means the grade if corrosion does not occur at all.

Accordingly, it can be seen that the rust generation grade of the rust-resistant corrugated cardboard pad of Sample 5 prepared according to the present invention is 3, and corrosion does not occur at all even in mild steel with a carbon content of less than 0.3%.

Table 3 below shows the comparative results of the rust-prevention test for carbon steel using the rust-resistant corrugated cardboard pads of Samples 1 to 8.

Sample film Rust generation grade Sample 1 Grade 3 Sample 2 Grade 3 Sample 3 Grade 3 Sample 4 Grade 2 Sample 5 Grade 3 Sample 6 Grade 3 Sample 7 Grade 1 Sample 8 Grade 1

In the anti-corrosion test shown in Table 3, each of the anti-corrosive corrugated cardboard pads of Samples 1 to 8 were cut into a size of 2.5 cmx15 cm, and two anti-corrosive corrugated cardboard pads were mounted in a 1000 ml Erlenmeyer flask, and a carbon steel specimen (DIN EN-10025) was rubberized Assemble on a stopper, leave for 20 hours at room temperature at 21℃∼25℃, add 10 ml of a solution of 1:2 mixture of glycerol and distilled water, and put it in a thermostat at 40℃ after 2 hours. This is the result of observing whether or not it is rusted.

In Table 3, the rust-resistant corrugated cardboard pads of Sample 1, Sample 2, Sample 3, Sample 5, and Sample 6 all have a rust-resistant grade of grade 3, and the rust-resistant corrugated cardboard pad of Sample 4 has a rust-proof grade of grade 2, and Sample 7 and It can be seen that the rust-resistant corrugated cardboard pad of Sample 8 has a grade of rust generation.

Therefore, the rust-resistant corrugated cardboard pad of Sample 5 prepared according to the present invention does not corrode at all even in carbon steel.

Table 4 below is a measurement of surface resistance measured by SURPA-385, a portable surface resistance meter, according to different temperatures and humidity for the rust-resistant corrugated cardboard pad of Sample 5, and the measurement unit is ohm/square.

In general, materials for the prevention and protection of static electricity are classified into anti-static, static dissipative, and conductive, depending on the surface resistance value in the range of conductivity for charge. Anti-Static) products have a surface resistance of 10 ⁹ ohm/square or more, so that static electricity does not occur.Static Dissipative products have a surface resistance of 10 ⁶ ∼10 ⁹ ohm/square, and there is no initial electronic charge. Discharge can be prevented from human contact, and conductive products have a surface resistance of 10 ³ ∼10 ⁶ ohm/square, which does not play a role in preventing static electricity.

Temperature Humidity 30% 50% 10℃ 10 ¹² ohm/square 10 ¹¹ ohm/square 15℃ 10 ¹² ohm/square 10 ¹¹ ohm/square 20℃ 10 ¹² ohm/square 10 ¹¹ ohm/square 25℃ 10 ¹¹ ohm/square 10 ¹¹ ohm/square 30℃ 10 ¹¹ ohm/square 10 ¹¹ ohm/square 35℃ 10 ¹¹ ohm/square 10 ¹¹ ohm/square 40℃ 10 ¹¹ ohm/square 10 ¹¹ ohm/square 45℃ 10 ¹¹ ohm/square 10 ¹¹ ohm/square

The surface resistance value for each temperature and humidity for the anti-corrosive corrugated cardboard pad of Sample 5 is 10 ¹¹ ohm/square or 10 ¹² ohm/square, and it has a uniform surface resistance value under various temperatures and humidity, so it is excellent in antistatic function. I can confirm...

As can be seen by the rust prevention experiments and surface resistance measurement experiments according to Tables 1 to 4 as described above, octanoic acid, sodium benzoate, and linear alkylbenzene without using nitrites, amines, or benzotriazoles harmful to the human body according to the present invention It can be seen that the anticorrosive corrugated cardboard pad of Sample 5 using a liquid anticorrosive agent mixed with sulfonate at an appropriate ratio has excellent antirust ability against ferrous and nonferrous metals, and uniform antistatic function.

Claims (2)

Forming a liquid rust inhibitor by mixing and stirring distilled water, octanoic acid, sodium benzoate, and linear alkylbenzene sulfonate to form a liquid rust inhibitor (S10);
Mixing and stirring step (S20) of mixing and stirring glycerol monostearate, polypropylene glycol, and water-soluble acrylic resin to the liquid rust inhibitor to form a mixture; And
It includes an impregnation step (S30) of impregnating the mixture into a cardboard pad by an impregnator,
The mixture contains 20 parts by weight to 70 parts by weight of octanoic acid, 80 parts by weight to 120 parts by weight of sodium benzoate, and 20 parts by weight to 70 parts by weight of the linear alkylbenzene sulfonate based on 1000 parts by weight of the distilled water. And, the glycerol monostearate is 10 parts by weight to 50 parts by weight, the polypropylene glycol is 10 parts by weight to 20 parts by weight, and the water-soluble acrylic resin is 40 parts by weight to 70 parts by weight. A method of manufacturing a rust-resistant corrugated cardboard pad with a function. delete

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