Printing coating for tipping paper and method for preparing the same

Abstract

The application provides a printing coating for water-based cigarette paper and a preparation method thereof. The printing coating for water-based cigarette paper is composed of the following raw materials in parts by weight: 65-75 parts of acrylic resin, 1-3 parts of chitosan gel, 2-6 parts of grafted modified polyethylene wax, 5-10 parts of silicon dioxide, 4-8 parts of surfactant, 10-14 parts of humectant, 2-4 parts of leveling agent, and 90-110 parts of deionized water. The grafted modified polyethylene wax is added to the printing coating by grafting modification of the polyethylene wax, which can effectively improve the condition that the water-based cigarette paper sticks to the lips during smoking, and the chitosan gel can significantly reduce the oil seepage phenomenon caused by the cigarette combustion process, reduce the oil sensitivity of the user, and comprehensively improve the use experience of the cigarette.

Description

Technical Field

[0001] This invention relates to the field of coatings, and more particularly to a printing coating for cork paper and its preparation method. Background Technology

[0002] Most cigarette filters are currently composed of three layers: cellulose acetate, forming paper, and tipping paper. The forming paper is used to wrap the cellulose acetate. Tipping paper, also known as tipping paper, is used to wrap the outside of the filter and attach the filter rod to the end of the cigarette pack. Tipping paper is a decorative paper obtained by printing, coating, and other processing of base paper. It is usually cork-colored or opaque white and serves to improve the appearance.

[0003] The tipping paper comes into direct contact with the smoker's lips. Since tipping paper is generally printed with only paint or ink, when the weather is dry, a small amount of saliva may wet the tipping paper when the consumer smokes the cigarette. As it dries slowly during the smoking process, the tipping paper on the filter will stick to the skin of the lips. After smoking the cigarette, the sticky skin will pull on the lips, making it difficult to exhale the filter smoothly.

[0004] Based on the above, this invention proposes a printing coating for cork paper and its preparation method, which can effectively solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a printing coating for cork paper and a method for preparing the same.

[0006] To achieve the above objectives, the present invention provides a printing coating for cork paper and a method for preparing the same. The printing coating for cork paper is composed of the following raw materials in parts by weight: 65-75 parts acrylic resin, 1-3 parts chitosan gel, 2-6 parts grafted modified polyethylene wax, 5-10 parts silica, 4-8 parts surfactant, 10-14 parts humectant, 2-4 parts leveling agent, and 90-110 parts deionized water.

[0007] Preferably, the chitosan gel is prepared by the following method: chitosan and galactomannan are mixed at a mass ratio of 2:1, and the mixture of chitosan and galactomannan is mixed with 0.1 mol / L sodium carbonate solution at a material-to-liquid ratio of 1 g: 30 ml. The mixture is stirred at 40-45°C for 20-25 min to form a uniform chitosan gel.

[0008] Preferably, the galactomannan includes one of fenugreek gum, guar gum, tara gum, and locust bean gum.

[0009] Preferably, the chitosan is quaternized chitosan, which is prepared by the following method: chitosan is mixed with a 10% sodium hydroxide solution at a ratio of 1g:30ml. Then, under magnetic stirring at 150-200 rpm / min, a 5% 2-chloroethylamine hydrochloride solution is added to the chitosan solution at a ratio of 1g:10ml. After the addition is complete, the reaction continues for 10-12 hours. The mixture is then dialyzed in distilled water for 3 days and then freeze-dried to obtain quaternized chitosan.

[0010] Preferably, the grafted modified polyethylene wax is prepared by the following method: polyethylene wax and xylene are miscible at a material-to-liquid ratio of 1g:20ml. After heating until completely melted, benzoyl peroxide and maleic anhydride are mixed at a mass ratio of 1.5:6. The mixture of benzoyl peroxide and maleic anhydride is then mixed with xylene solution at a material-to-liquid ratio of 1g:15ml. The xylene solution containing benzoyl peroxide and maleic anhydride is added dropwise to the xylene solution containing polyethylene wax at a rate of 0.1ml per second. The reaction is carried out at 130-135℃ for 3 hours. After the reaction is completed, the reactants are poured into 3-5 times their volume of acetone, stirred thoroughly, filtered, and dried. Then, using acetone as a solvent, the mixture is extracted using a Soxhlet extractor for 8-10 hours and dried to obtain the grafted modified polyethylene wax.

[0011] Preferably, the acrylic resin is a water-based acrylic resin, and in one embodiment, the acrylic resin is a styrene-acrylic resin.

[0012] Preferably, the surfactant is a Tween or Span surfactant. In one embodiment, the surfactant is a mixture of Tween 80 and Tween 60.

[0013] Preferably, the humectant comprises one or a combination of two or more of polyethylene glycol, glycerol, and dodecyl alcohol ester. In one embodiment, the humectant is polyethylene glycol.

[0014] Preferably, the leveling agent comprises one or a combination of two or more of polydimethylsiloxane, dimethyl silicone oil, and epoxy hydrocarbon-based polysiloxane. In one embodiment, the leveling agent is polydimethylsiloxane.

[0015] The present invention also provides a method for preparing printing coating for cork paper, the method comprising the following steps:

[0016] (1) Add the grafted modified polyethylene wax, Tween 60 and chitosan gel to half the amount of deionized water in the formula, and stir at 550-600 r / min for 2.0-2.5 h to obtain grafted modified polyethylene wax / chitosan gel.

[0017] (2) Add acrylic resin, silica, Tween 80 to the remaining amount of deionized water in the formula, stir at 500-550 r / min for 50-60 min at 40-45℃, then add grafted modified polyethylene wax / chitosan gel, stir at 1100-1200 r / min for 55-60 min, then add humectant and leveling agent, and continue stirring for 55-60 min to obtain the final product.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. This invention, by grafting and modifying polyethylene wax and adding the grafted and modified polyethylene wax to printing coatings, can effectively improve the situation where tipping paper sticks to the lips and skin during cigarette smoking. At the same time, in combination with chitosan gel, it can significantly reduce the oil seepage caused by cigarette combustion, reduce the user's oil sensitivity, and comprehensively improve the cigarette user experience.

[0020] 2. The preparation method of the present invention is convenient to operate, easy to mass-produce, and has stable quality.

[0021] 3. The raw materials for this invention are abundant and reasonably priced in China, which means that there are no high cost restrictions on its large-scale production. Detailed Implementation

[0022] Example 1

[0023] The preparation steps of chitosan gel are as follows:

[0024] (1) Chitosan and 10% sodium hydroxide solution were mixed at a ratio of 1g:30ml. Then, under magnetic stirring at 150-200 rpm / min, 5% 2-chloroethylamine hydrochloride solution was added to the chitosan solution at a rate of 0.02ml per second at a ratio of 1g:10ml. After the addition was completed, the reaction continued for 10-12 hours. The solution was then dialyzed in distilled water for 3 days and then freeze-dried to obtain quaternized chitosan.

[0025] (2) After mixing the quaternized chitosan and guar gum at a mass ratio of 2:1, mix the mixture of quaternized chitosan and guar gum with 0.1 mol / L sodium carbonate solution at a material-liquid ratio of 1 g: 30 ml. Stir at 40-45℃ for 20-25 min to form a uniform chitosan gel.

[0026] Example 2

[0027] The preparation steps of grafted modified polyethylene wax are as follows:

[0028] Polyethylene wax and xylene were mixed at a ratio of 1g:20ml and heated until completely melted. Benzoyl peroxide and maleic anhydride were mixed at a mass ratio of 1.5:6. The mixture of benzoyl peroxide and maleic anhydride was then mixed with xylene solution at a ratio of 1g:15ml. The xylene solution containing benzoyl peroxide and maleic anhydride was added dropwise to the xylene solution of polyethylene wax at a rate of 0.1ml per second. The reaction was carried out at 130-135℃ for 3 hours. After the reaction was completed, the reactants were poured into 3-5 times their volume of acetone, stirred thoroughly, filtered, and dried. Then, using acetone as a solvent, the mixture was extracted with a Soxhlet extractor for 8-10 hours and dried to obtain the grafted modified polyethylene wax.

[0029] Example 3

[0030] The amounts of each raw material are shown in Table 1. The specific preparation method includes the following steps:

[0031] (1) Add the grafted modified polyethylene wax, Tween 60 and chitosan gel to half the amount of deionized water and stir at 550 r / min for 2.5 h to obtain the grafted modified polyethylene wax / chitosan gel.

[0032] (2) Add acrylic resin, silica, Tween 80 to the remaining amount of deionized water, stir at 500 r / min for 60 min at 40℃, then add grafted modified polyethylene wax / chitosan gel, stir at 1100 r / min for 60 min, then add humectant and leveling agent, and continue stirring for 60 min to obtain the final product.

[0033] Example 4

[0034] The amounts of each raw material are shown in Table 1. The specific preparation method includes the following steps:

[0035] (1) Add the grafted modified polyethylene wax, Tween 60 and chitosan gel to half the amount of deionized water and stir at 600 r / min for 2.0 h to obtain the grafted modified polyethylene wax / chitosan gel.

[0036] (2) Add acrylic resin, silica, Tween 80 to the remaining amount of deionized water, stir at 550 r / min for 50 min at 45°C, then add grafted modified polyethylene wax / chitosan gel, stir at 1200 r / min for 55 min, then add humectant and leveling agent, and continue stirring for 55 min to obtain the final product.

[0037] Example 5

[0038] The amounts of each raw material are shown in Table 1. The specific preparation method includes the following steps:

[0039] (1) Add the grafted modified polyethylene wax, Tween 60 and chitosan gel to half the amount of deionized water and stir at 600 r / min for 2.5 h to obtain the grafted modified polyethylene wax / chitosan gel.

[0040] (2) Add acrylic resin, silica, Tween 80 to the remaining amount of deionized water, stir at 550 r / min for 60 min at 45℃, then add grafted modified polyethylene wax / chitosan gel, stir at 1200 r / min for 60 min, then add humectant and leveling agent, and continue stirring for 60 min to obtain the final product.

[0041] Comparative Example 1

[0042] Unlike Example 5, ordinary chitosan was used instead of the chitosan gel prepared in Example 1. Everything else was the same as in Example 5. The amounts of each ingredient are shown in Table 1.

[0043] Comparative Example 2

[0044] Unlike Example 5, the chitosan gel prepared in Example 1 or ordinary chitosan was not added. The rest is the same as in Example 5. The amounts of each raw material are shown in Table 1.

[0045] Comparative Example 3

[0046] Unlike Example 5, ordinary polyethylene wax was used instead of the grafted modified polyethylene wax prepared in Example 2. The rest was the same as in Example 5. The amounts of each raw material are shown in Table 1.

[0047] Comparative Example 4

[0048] Unlike Example 5, neither the grafted modified polyethylene wax prepared in Example 2 nor ordinary polyethylene wax was added. The rest is the same as in Example 5. The amounts of each raw material are shown in Table 1.

[0049] Comparative Example 5

[0050] Unlike Example 5, the chitosan gel prepared in Example 1 and the grafted modified polyethylene wax prepared in Example 2 were not added; instead, 15 parts of beeswax were used. The rest is the same as in Example 5. The amounts of each raw material are shown in Table 1.

[0051] Comparative Example 6

[0052] Unlike Example 5, the chitosan gel prepared in Example 1 and the grafted modified polyethylene wax prepared in Example 2 were not added; instead, 10 parts of beeswax were used. The rest is the same as in Example 5. The amounts of each raw material are shown in Table 1.

[0053] Table 1

[0054]

[0055]

[0056] Performance testing

[0057] The coatings from Examples 3-5 and Comparative Examples 1-6 were applied to tipping paper and prepared into cigarettes. The indoor humidity was controlled at 30-35%, and the temperature at 20-25°C. Fifteen professionals were selected for each group. Before lighting a cigarette, participants were instructed to moisten the tipping paper with saliva, then light and smoke the cigarette within 10 seconds. Each participant smoked three cigarettes, taking ten puffs per cigarette, with each puff lasting 1-2 seconds and intervals of 25-30 seconds between puffs. The number of puffs at which the tipping paper began to stick to the lips and the oily sensation were recorded. The degree of aversion to the oily sensation was ranked from mild to severe: no obvious oily sensation, slight oily sensation, and obvious oily sensation. The average results were taken. The test results are shown in Table 2.

[0058] Table 2 Test Results

[0059] Example 1 Non-sticky No noticeable oiliness Example 2 Non-sticky No noticeable oiliness Example 3 Non-sticky No noticeable oiliness Comparative Example 1 Sticking occurred for the 9th time. Slightly oily Comparative Example 2 Non-sticky Noticeably oily Comparative Example 3 The fifth time it stuck together. No noticeable oiliness Comparative Example 4 The third time it sticked together. No noticeable oiliness Comparative Example 5 Sticking occurred for the 9th time. Noticeably oily Comparative Example 6 The fifth time it stuck together. Slightly oily

[0060] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

1. A printing coating for cork paper, characterized in that, The printing coating for the cork paper is composed of the following raw materials in parts by weight: 65-75 parts acrylic resin, 1-3 parts chitosan gel, 2-6 parts grafted modified polyethylene wax, 5-10 parts silica, 4-8 parts surfactant, 10-14 parts humectant, 2-4 parts leveling agent, and 90-110 parts deionized water. The chitosan gel was prepared by the following method: chitosan and galactomannan were mixed at a mass ratio of 2:1, and the mixture of chitosan and galactomannan was mixed with 0.1 mol / L sodium carbonate solution at a material-liquid ratio of 1 g: 30 ml. The mixture was stirred at 40~45℃ for 20~25 min to form a uniform chitosan gel. The chitosan is quaternized chitosan, which is prepared by the following method: chitosan and a 10% sodium hydroxide solution are mixed at a ratio of 1g:30ml. Then, under magnetic stirring at 150-200rpm, a 5% 2-chloroethylamine hydrochloride solution is added to the chitosan solution at a rate of 0.02ml per second at a ratio of 1g:10ml. After the addition is complete, the reaction continues for 10-12 hours. The solution is then dialyzed in distilled water for 3 days and then freeze-dried to obtain quaternized chitosan. The grafted modified polyethylene wax is prepared by the following method: polyethylene wax and xylene are miscible at a material-to-liquid ratio of 1g:20ml. After heating until completely melted, benzoyl peroxide and maleic anhydride are mixed at a mass ratio of 1.5:

6. The mixture of benzoyl peroxide and maleic anhydride is then mixed with xylene solution at a material-to-liquid ratio of 1g:15ml. The xylene solution containing benzoyl peroxide and maleic anhydride is added dropwise to the xylene solution of polyethylene wax at a rate of 0.1ml per second. The reaction is carried out at 130~135℃ for 3h. After the reaction is completed, the reactants are poured into 3~5 times their volume of acetone, stirred thoroughly, filtered, and dried. Then, using acetone as a solvent, the mixture is extracted using a Soxhlet extractor for 8~10h and dried to obtain the grafted modified polyethylene wax.

2. The printing coating for cork paper according to claim 1, characterized in that, The galactomannan includes one of fenugreek gum, guar gum, tara gum, and locust bean gum.

3. The printing coating for cork paper according to claim 1, characterized in that, The acrylic resin is a water-based acrylic resin.

4. The printing coating for cork paper according to claim 1, characterized in that, The surfactant is a mixture of Tween 80 and Tween 60.

5. The printing coating for cork paper according to claim 1, characterized in that, The humectant includes one or a combination of two or more of polyethylene glycol, glycerol, and dodecyl alcohol ester.

6. The printing coating for cork paper according to claim 1, characterized in that, The leveling agent includes one or more of polydimethylsiloxane, dimethyl silicone oil, and epoxy hydrocarbon-based polysiloxane.

7. A method for preparing the printing coating for cork paper according to any one of claims 1 to 6, characterized in that, The method includes the following steps: (1) Add the grafted modified polyethylene wax, Tween 60 and chitosan gel to half the amount of deionized water and stir at 550~600 r / min for 2.0~2.5 h to obtain grafted modified polyethylene wax / chitosan gel. (2) Add acrylic resin, silica and Tween 80 to the remaining amount of deionized water in the formula, stir at 500-550 r / min for 50-60 min at 40-45℃, then add grafted modified polyethylene wax / chitosan gel, stir at 1100-1200 r / min for 55-60 min, then add humectant and leveling agent, and continue stirring for 55-60 min to obtain the final product.

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