Environment-friendly moisture-proof high-speed cigarette adhesive and preparation method thereof

Abstract

The present application belongs to the technical field of cigarette glue, and particularly relates to an environment-friendly moisture-proof high-speed cigarette glue and a preparation method thereof. The environment-friendly moisture-proof high-speed cigarette glue is composed of the following components in percentage: 10-15% corn starch co-precipitation composite modified cross-linked soybean protein, 1-3% polyacrylic acid, 1-3% polyvinyl alcohol, 2-5% hydroxyethyl cellulose, 0.5-1% potassium sorbate, 0.5-1% sodium dodecyl sulfate, 2-5% urea-formaldehyde resin, 60-70% VAE emulsion and water in remainder. The environment-friendly moisture-proof high-speed cigarette glue has excellent water solubility and stability, extremely low volatile organic compound content, can provide good adhesion on different surfaces, ensures the structural stability of the cigarette, has a fast water evaporation speed, can realize fast curing in the cigarette production line, and has excellent hydrostatic pressure resistance and good waterproof and moisture-proof performance.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cigarette glue, and particularly relates to an environment-friendly moisture-proof high-speed cigarette glue and a preparation method thereof. BACKGROUND

[0002] High-speed cigarette glue is a special adhesive used in cigarette production, usually used to bond cigarette paper, tobacco, filter tips and other components to ensure the stability and integrity of the cigarette product. With the advancement of cigarette production technology, the demand for cigarette glue has also changed, especially in the application of high-speed and automated production lines, which has promoted the continuous development of cigarette glue technology. With the continuous expansion of global cigarette production scale, cigarette production gradually realizes automation and assembly line operation, and the production speed is greatly improved. In order to meet the requirements of high-speed production, the performance of the adhesive must be greatly improved in order to complete the bonding work in a shorter time without affecting the quality of the cigarette. Traditional cigarette glue is usually water-based glue or solvent-based glue, although they work well in lower-speed production lines, but under high-speed production conditions, they often cannot meet the requirements of rapid curing and strong bonding. Therefore, the research and development of high-speed cigarette glue has become an important part of the progress of cigarette industry technology.

[0003] With the strictness of environmental protection regulations, traditional solvent-based adhesives are gradually eliminated, and water-based glue, solvent-free glue and other environmentally friendly adhesives are used instead. These adhesives not only meet environmental standards, but also do not release harmful volatile organic compounds during production. Chinese patent with publication number CN107502229A discloses a kind of nanocrystalline cellulose enhanced oxidation modified corn starch cigarette glue and preparation method, which uses cellulose oxidation modified corn starch to obtain a kind of biomass cigarette glue. The cigarette glue has the advantages of fast drying speed and good film forming property, but it still contains volatile and semi-volatile harmful substances. Chinese patent with publication number CN110872478A discloses a kind of low viscosity high speed cigarette glue and preparation method thereof, the prepared cigarette glue has the advantages of low viscosity and good dispersibility, but its drying time is too long, and it is not stable after dilution and has poor water resistance.

[0004] In view of the above technical defects, a solution is proposed. SUMMARY

[0005] The purpose of the present application is to provide an environment-friendly moisture-proof high-speed cigarette glue and a preparation method thereof. The environment-friendly high-speed cigarette glue of the present application meets the hygiene standards of the cigarette glue industry, has very little harmful substance content, and has fast drying and excellent waterproof performance.

[0006] To achieve the above object the present application adopts the following technical scheme: An environment-friendly moisture-proof high-speed cigarette adhesive is composed of the following components in percentage: 10-15% corn starch co-precipitation composite modified cross-linked soybean protein, 1-3% polyacrylic acid, 1-3% polyvinyl alcohol, 2-5% hydroxyethyl cellulose, 0.5-1% potassium sorbate, 0.5-1% sodium dodecyl sulfate, 2-5% urea-formaldehyde resin, 60-70% VAE emulsion and water in remainder;

[0007] The preparation method of the corn starch co-precipitation composite modified cross-linked soybean protein comprises the following steps:

[0008] A1: corn starch is added into pure water, the speed of the stirrer is set to 800-900 rpm and stirred for 30 min;

[0009] A2: soybean protein is added into pure water, the speed of the stirrer is set to 800-900 rpm and stirred for 30 min;

[0010] A3: the dissolved corn starch and the dissolved soybean protein are mixed, a glass rod is used for gentle stirring, the stirring is stopped after 5 min, and the mixture is left to stand for 15 min; after the standing, pH paper is used to detect the pH value of the mixed corn starch and soybean protein mixture, and the pH value of the mixture is adjusted to 4.2-4.8 by using acetic acid and ammonia water;

[0011] A4: after the pH adjustment, the mixture is left to stand for 15 min, and then coupling agent N-(β-aminoethyl-γ-aminopropyl) methyl dimethoxy silane is added, and the speed of the stirrer is adjusted to 400-500 rpm, and the stirring is carried out for 30 min;

[0012] A5: the reaction temperature is adjusted to 12-15℃, at this time, the corn starch and the soybean protein in the solution appear co-precipitation reaction through the action of hydrogen bond and electrostatic force, and the reaction temperature is maintained for 30-40 min;

[0013] A6: the composite precipitate and deionized water are separated by using filter paper, and after the separation, the unreacted soybean protein and corn starch are washed by using deionized water, and the separation and washing are repeated for 1-2 times;

[0014] A7: the washed composite precipitate is placed into a drying oven, the drying temperature is set to 55-60℃, and the drying is carried out for 4-6 hours, and then the dried composite precipitate is added into a grinding machine, and the grinding is carried out for 45-60 min to obtain corn starch co-precipitation composite modified soybean protein;

[0015] Further, the mass ratio of corn starch and deionized water in step A1 is 1:50; the mass ratio of corn starch and deionized water in step A2 is 1:50; the mass ratio of the dissolved corn starch and the dissolved soybean protein in step A3 is 1:1; and the coupling agent in step A4 is N-aminoethyl-3-aminopropyl methyl dimethoxy silane, wherein the mass ratio of the coupling agent and the mixed corn starch and soybean protein mixture is 1:50.

[0016] Further, a preparation method of the environment-friendly moisture-proof high-speed cigarette adhesive comprises the following steps:

[0017] B1: corn starch, co-precipitated and modified, cross-linked soybean protein, hydroxyethyl cellulose and urea-formaldehyde resin are added into deionized water, the stirring speed of the stirrer is adjusted to 600-800 rpm, the reaction temperature is adjusted to 60-65 DEG C, and the stirring and dissolution are performed for 45 min to obtain product A;

[0018] B2: polyacrylic acid, polyvinyl alcohol and VAE emulsion are added into deionized water, the stirring speed of the stirrer is adjusted to 600-800 rpm, the reaction temperature is adjusted to 45-50 DEG C, and the stirring and dissolution are performed for 45 min to obtain product B;

[0019] B3: product A and product B are mixed and added into a reaction kettle, potassium sorbate and sodium dodecyl sulfate are added, the stirring speed of the stirrer is adjusted to 300-400 rpm, the reaction temperature is adjusted to 65-70 DEG C, and the stirring reaction is performed for 1-1.5 h, followed by standing for 15 min to obtain an environment-friendly moisture-proof high-speed cigarette adhesive.

[0020] Further, the VAE emulsion is an aqueous vinyl acetate-ethylene copolymer emulsion; the hydroxyethyl cellulose is water-soluble hydroxyethyl cellulose, and the density is 7000-9000 g / cm 3 ; and the urea-formaldehyde resin is melamine modified water-soluble urea-formaldehyde resin powder, and the density is 1.17 g / cm 3 .

[0021] As described above, due to the adoption of the above technical solutions, the environment-friendly moisture-proof high-speed cigarette adhesive has excellent water solubility and stability, a very low volatile organic compound content, can provide good adhesion on different surfaces, ensures the structural stability of the cigarette, has a fast water evaporation speed, can realize fast curing in a cigarette production line, and has excellent hydrostatic pressure resistance and good waterproof and moisture-proof performance. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific examples.

[0023] The experimental methods in the following examples are all conventional methods, and are carried out according to the techniques or conditions described in the literature in the art or according to the product instructions, unless otherwise specified. The materials, reagents, etc. used in the following examples can be obtained commercially, unless otherwise specified.

[0024] Example 1

[0025] 1: 50 g of corn starch was added to 2.5 L of pure water, and the stirrer speed was set to 900 rpm for stirring for 30 min;

[0026] 2: 50 g of soybean protein was added to 2.5 L of pure water, and the stirrer speed was set to 900 rpm for stirring for 30 min;

[0027] 3: 2 kg of the dissolved corn starch and 2 kg of the dissolved soybean protein were mixed, and a glass rod was used for gentle stirring. After stirring for 5 min, the stirring was stopped, and the mixture was allowed to stand for 15 min. After standing, the pH value of the mixed corn starch-soybean protein mixture was detected using pH paper, and the pH value of the mixture was adjusted to 4.4 using acetic acid and ammonia water;

[0028] 4: After the pH adjustment, the mixture was allowed to stand for 15 min. After standing, 80 g of coupling agent N-(β-aminoethyl-γ-aminopropyl)methyldimethoxysilane was added, and the stirrer speed was adjusted to 500 rpm for stirring for 30 min;

[0029] 5: The reaction temperature was adjusted to 15°C. At this time, the corn starch and the soybean protein in the solution underwent a co-precipitation reaction through the action of hydrogen bonds and electrostatic forces. The reaction temperature was maintained for 40 min;

[0030] 6: The composite precipitate and deionized water were separated using filter paper. After separation, the unreacted soybean protein and corn starch were washed with deionized water. The separation and washing were repeated twice;

[0031] 7: The washed composite precipitate was placed in a drying oven, and the drying temperature was set to 60°C. The composite precipitate was dried for 6 hours. Subsequently, the dried composite precipitate was added to a grinding machine, and was ground for 60 min to obtain the corn starch co-precipitation composite modified soybean protein prepared in Example 1;

[0032] Table 1: Reagent parameter table used in Example 1

[0033]

[0034] Example 2

[0035] 1: 100 g of corn starch was added to 5 L of pure water, and the stirrer speed was set to 800 rpm for stirring for 30 min;

[0036] 2: 100 g of soybean protein was added to 5 L of pure water, and the stirrer speed was set to 800 rpm for stirring for 30 min;

[0037] 3: 1 kg of dissolved corn starch and 1 kg of dissolved soybean protein were mixed, and a glass rod was used for gentle stirring. After stirring for 5 min, the stirring was stopped, and the mixture was allowed to stand for 15 min. After standing, the pH value of the mixed corn starch and soybean protein solution was detected using pH paper, and the pH value of the mixed solution was adjusted to 4.8 using acetic acid and ammonia water;

[0038] 4: After the pH adjustment, the mixture was allowed to stand for 15 min. After standing, 40 g of coupling agent N-(β-aminoethyl-γ-aminopropyl) methyl dimethoxy silane was added, and the stirrer speed was adjusted to 500 rpm for stirring for 30 min;

[0039] 5: The reaction temperature was adjusted to 12°C, at which time the corn starch and soybean protein in the solution underwent a co-precipitation reaction through hydrogen bonding and electrostatic force. The reaction temperature was maintained for 40 min;

[0040] 6: The composite precipitate and deionized water were separated using filter paper. After separation, the unreacted soybean protein and corn starch were washed with deionized water, and the separation and washing were repeated twice;

[0041] 7: The washed composite precipitate was placed in a drying oven, and the drying temperature was set to 58°C. The composite precipitate was dried for 6 hours, and then the dried composite precipitate was added to a grinding machine and ground for 60 min to obtain the corn starch co-precipitation composite modified soybean protein prepared in Example 2;

[0042] Table 2: Reagent parameter table used in Example 2

[0043]

[0044] Example 3

[0045] 1: 30 g of the corn starch co-precipitation composite modified crosslinked soybean protein prepared in Example 1, 10 g of hydroxyethyl cellulose, and 10 g of urea-formaldehyde resin were added to 7 ml of deionized water. The stirrer speed was adjusted to 800 rpm, and the reaction temperature was adjusted to 65°C for stirring and dissolution for 45 min to obtain product A;

[0046] 2: 6 g of polyacrylic acid, 6 g of polyvinyl alcohol, and 120 g of VAE emulsion were added to 7 ml of deionized water. The stirrer speed was adjusted to 800 rpm, and the reaction temperature was adjusted to 50°C for stirring and dissolution for 45 min to obtain product B;

[0047] 3: Put product A and product B into the reaction kettle, add 2 g of potassium sorbate and 2 g of sodium dodecyl sulfate, adjust the stirring speed to 400 rpm, adjust the reaction temperature to 70℃, and stir for 1.5 h and then stand for 15 min to obtain an environmentally friendly moisture-proof high-speed cigarette adhesive prepared in Example 3.

[0048] Table 3, reagent parameter table used in Example 3

[0049] Drug name Source Model Parameter Polyacrylic acid Changzhou Runyang Chemical Co., Ltd. GY-303 200ml Polyvinyl alcohol Langfang Feitai New Material Technology Co., Ltd. 2488-5 500g Hydroxyethyl cellulose Sichuan Blue Sunshine Daily Chemical Co., Ltd. XH-666 1 kg Potassium sorbate Henan Jianchang Chemical Co., Ltd. 012 1 kg Sodium dodecyl sulfate Langfang Pengcai Chemical Co., Ltd. 151-21-3 25 kg Urea-formaldehyde resin Langfang Senbang Chemical Co., Ltd. SB-02 VAE emulsion Shandong Kejian Chemical Co., Ltd. 5 kg 41242 Drug name

[0050] Example 4

[0051] 10-15% corn starch co-precipitation composite modified cross-linked soybean protein, 1-3% polyacrylic acid, 1-3% polyvinyl alcohol, 2-5% hydroxyethyl cellulose, 0.5-1% potassium sorbate, 0.5-1% sodium dodecyl sulfate, 2-5% urea formaldehyde resin, 60-70% VAE emulsion and water balance

[0052] 1: Put 20 g of corn starch co-precipitation composite modified cross-linked soybean protein prepared in Example 2, 4 g of hydroxyethyl cellulose and 4 g of urea formaldehyde resin into deionized water, adjust the stirring speed to 800 rpm, adjust the reaction temperature to 65℃, and stir for 45 min to obtain product A;

[0053] 2: Put 4 g of polyacrylic acid, 4 g of polyvinyl alcohol and 140 g of VAE emulsion into deionized water, adjust the stirring speed to 600-800 rpm, adjust the reaction temperature to 45-50℃, and stir for 45 min to obtain product B;

[0054] 3: Put product A and product B into the reaction kettle, add 1 g of potassium sorbate and 1 g of sodium dodecyl sulfate, adjust the stirring speed to 400 rpm, adjust the reaction temperature to 70℃, and stir for 1 h and then stand for 15 min to obtain an environmentally friendly moisture-proof high-speed cigarette adhesive prepared in Example 4.

[0055] Table 4, reagent parameter table used in Example 4

[0056] Source Model Parameter Polyacrylic acid Changzhou Runyang Chemical Co., Ltd. GY-303 Polyvinyl alcohol 200ml Langfang Feitai New Material Technology Co., Ltd. Hydroxyethyl cellulose 2488-5 500g Sichuan Blue Sunshine Daily Chemical Co., Ltd. XH-666 1 kg Potassium sorbate Henan Jianchang Chemical Co., Ltd. 1 kg 012 Sodium dodecyl sulfate Langfang Pengcai Chemical Co., Ltd. 25 kg 151-21-3 Urea-formaldehyde resin Langfang Senbang Chemical Co., Ltd. SB-02 VAE emulsion 1k g ]] Shandong Kejian Chemical Co., Ltd. 5 kg 41242 Viscosity (MPa·S)

[0057] Comparative Example 1

[0058] The specific embodiment of the Chinese patent with publication number CN107502229A is selected as Comparative Example 1.

[0059] Comparative Example 2

[0060] The Example 1 of the Chinese patent with publication number CN110872478A is selected as Comparative Example 2.

[0061] Physical property test:

[0062] The conventional performance parameters of Example 3, Example 4, Comparative Example 1 and Comparative Example 2 were subjected to physical performance testing: cotton cloth was selected as the test substrate, and the peeling strength of Example 3, Example 4, Comparative Example 1 and Comparative Example 2 was tested after being glued on the cotton cloth substrate for 30S; the dilution stability was detected according to the high-speed cigarette adhesive dilution stability test method specified in YC / T188-2004 High-Speed Cigarette Adhesive; and the shear thinning index was tested according to the method of Rheological Properties of Non-Newtonian Materials by Rotary Viscometer in Appendix B of ASTM D2196-2015 Standard Test Methods for Example 3, Example 4, Comparative Example 1 and Comparative Example 2.

[0063] Table 5, results of conventional physical performance testing

[0064] Solid content (%) PH value Tack-free time Example 3 5 minutes 45 seconds 300 48.4 4.5 Example 4 5 minutes 50 seconds 300 48.7 4.5 Comparative example 1 6 minutes 30 seconds 400 50.4 4.6 Comparative example 2 6 minutes 45 seconds 200 50.6 4.7 Film resolubility

[0065] Table 6, results of physical performance testing

[0066] Initial tack Dilution stability Shear thinning index Example 3 3 seconds, dissolved 0.58 N / 20 mm Example 4 3％ 1.04 3 seconds, dissolved 0.59 N / 20 mm Comparative example 1 3％ 1.03 4 seconds, dissolved 0.54 N / 20 mm Comparative example 2 3％ 1.06 5 seconds, dissolved 0.52 N / 20 mm ​ 3.6％ 1.08

[0067] Waterproof performance test of cigarette adhesive

[0068] According to the relevant provisions of ISO 811-1981, the waterproof performance of the prepared cigarette adhesive was detected using a hydrostatic pressure tester. Six samples of Example 3, Example 4, Comparative Example 1 and Comparative Example 2 were taken, and the results were averaged. The water pressure rising rate was 0.59 kPa / min, and the water temperature was 20C. After the sample was humidified under standard atmospheric conditions, the test surface of the cigarette adhesive was in contact with water, and an increasing water pressure was applied to the sample, and the phenomenon of water seepage was observed constantly. The hydrostatic pressure value at the third place of the cigarette adhesive was recorded. The average value was obtained by repeating the test. The larger the result, the better the hydrostatic pressure performance.

[0069] Table 7, results of waterproof performance test

[0070]

[0071]

[0072] From the analysis of Table 7, it can be seen that the cigarette adhesive prepared by Example 3 and Example 4 has very excellent waterproof performance in the waterproof performance test, and can withstand a hydrostatic pressure value of 8kPa under standard atmospheric pressure conditions.

[0073] Harmful substance content test of cigarette adhesive

[0074] Table 8, volatile and semi-volatile organic matter content test

[0075]

[0076] Table 9, inorganic element content

[0077]

[0078] From the analysis of Table 8 and Table 9, it can be seen that the cigarette gum prepared in Example 3 and Example 4 meets the hygiene standard of cigarette gum (MK / JS517-2010) issued by the Chinese cigarette industry.

[0079] The above shows and describes the basic principles and main features of the present application and the advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above examples, and the above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An environment-friendly moisture-proof high-speed cigarette adhesive, characterized in that, It is composed of the following percentage components: 10-15% corn starch co-precipitation composite modified cross-linked soybean protein, 1-3% polyacrylic acid, 1-3% polyvinyl alcohol, 2-5% hydroxyethyl cellulose, 0.5-1% potassium sorbate, 0.5-1% sodium dodecyl sulfate, 2-5% urea formaldehyde resin, 60-70% VAE emulsion and deionized water balance; The preparation method of the corn starch co-precipitation composite modified cross-linked soybean protein comprises the following steps: A1: Add corn starch into pure water, set the stirring speed of the stirrer to 800-900 rpm and stir for 30 min; A2: Add soybean protein into pure water, set the stirring speed of the stirrer to 800-900 rpm and stir for 30 min; A3: Mix the dissolved corn starch and soybean protein in a mass ratio of 1:1, gently stir with a glass rod, stop stirring after 5 min, and let stand for 15 min. After standing, use pH paper to detect the pH value of the mixed corn starch and soybean protein solution. Adjust the pH value of the mixed solution to 4.2-4.8 with acetic acid and ammonia water; A4: After pH adjustment, let stand for 15 min. After standing, add coupling agent N-(β-aminoethyl-γ-aminopropyl) methyldimethoxysilane, and adjust the stirring speed of the stirrer to 400-500 rpm. Stir for 30 min; A5: Adjust the reaction temperature to 12-15℃. At this time, the corn starch and soybean protein in the solution undergo co-precipitation reaction through hydrogen bonding and electrostatic force. Maintain the reaction temperature and precipitate for 30-40 min; A6: Separate the composite precipitate and deionized water using filter paper. After separation, wash the unreacted soybean protein and corn starch with deionized water. Repeat the separation and washing 1-2 times; A7: Put the washed composite precipitate into a drying oven, set the drying temperature to 55-60℃, and dry for 4-6 hours. Then, put the dried composite precipitate into a grinder and grind for 45-60 min to obtain corn starch co-precipitation composite modified soybean protein.

2. The environment-friendly moisture-proof high-speed cigarette adhesive according to claim 1, characterized in that, The mass ratio of corn starch to pure water in step A1 is 1:

50.

3. The environment-friendly moisture-proof high-speed cigarette adhesive according to claim 1, characterized in that, The mass ratio of soybean protein to pure water in step A2 is 1:

50.

4. The environment-friendly moisture-proof high-speed cigarette adhesive according to claim 1, characterized in that, The mass ratio of the coupling agent to the mixed corn starch and soybean protein solution in step A4 is 1:

50.

5. The environment-friendly moisture-proof high-speed cigarette adhesive according to claim 1, characterized in that, The VAE emulsion is a water-based vinyl acetate-ethylene copolymer emulsion.

6. The environment-friendly moisture-proof high-speed cigarette adhesive according to claim 1, characterized in that, The urea-formaldehyde resin is a melamine-modified water-soluble urea-formaldehyde resin powder having a density of 1.17 g / cm 3 .

7. The preparation method of the environment-friendly moisture-proof high-speed cigarette adhesive according to claim 1, characterized in that, The steps include: B1: Add corn starch co-precipitation composite modified cross-linked soybean protein, hydroxyethyl cellulose and urea formaldehyde resin into deionized water, adjust the stirring speed of the stirrer to 600-800 rpm, adjust the reaction temperature to 60-65℃, and stir and dissolve for 45 min to obtain product A; B2: Add polyacrylic acid, polyvinyl alcohol and VAE emulsion into deionized water, adjust the stirring speed of the stirrer to 600-800 rpm, adjust the reaction temperature to 45-50℃, and stir and dissolve for 45 min to obtain product B; B3: the product A and product B are mixed and added into the reaction kettle, while adding potassium sorbate and sodium dodecyl sulfate, adjusting the stirring speed to 300-400 rpm, adjusting the reaction temperature to 65-70 ℃, stirring for 1-1.5 h and then standing for 15 min to obtain an environment-friendly moisture-proof high-speed cigarette adhesive.

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