Oxygen storage cigarette paper, preparation method and application thereof

Abstract

The application discloses oxygen storage cigarette paper and a preparation method and application thereof, and relates to the field of cigarette paper preparation.The preparation method comprises the following steps: carrying out pulp treatment and beating treatment on wood pulp raw materials to obtain pulp; mixing oxygen storage materials, cyclodextrin and water to obtain an oxygen storage liquid; mixing the pulp, calcium carbonate and the oxygen storage liquid to obtain mixed pulp; carrying out vacuum dewatering treatment on the mixed pulp to obtain preformed paper; and carrying out one-time drying treatment, sizing treatment, secondary drying treatment and rewinding treatment on the preformed paper to obtain the oxygen storage cigarette paper.The oxygen storage cigarette paper directly adds calcium carbonate and the oxygen storage liquid in the pulp mixing process, so that combustion-supporting agents do not need to be additionally added, the adverse effects caused by adding the combustion-supporting agents are avoided, costs are saved, and the preparation process of the cigarette paper is simplified.

Description

Technical Field

[0001] This invention relates to the field of cigarette manufacturing, and more specifically, to an oxygen-storing cigarette paper, its preparation method, and its application. Background Technology

[0002] Cigarette paper, as an important material for cigarettes, not only wraps the tobacco but also participates in combustion, affecting the sensory quality and tar content of cigarettes. The main technical parameters of cigarette paper include air permeability, basis weight, and combustion aid content.

[0003] In the application of low-tar cigarettes, cigarette paper with good air permeability and high combustion aid content is usually selected to increase the amount of air entering, promote the complete combustion of cigarette paper and tobacco, and thus reduce cigarette tar.

[0004] However, combustion improvers are chemical reagents (such as potassium nitrate, sodium nitrate, potassium citrate, etc.). Combustion improvers may not only have an adverse effect on the whiteness and appearance of cigarette paper, but also produce toxic and harmful substances such as nitrogen oxides during high-temperature combustion, which are harmful to the senses and the body.

[0005] Therefore, how to provide cigarette paper that avoids the use of combustion enhancers has become a technical challenge to be solved in this field. Summary of the Invention

[0006] One object of the present invention is to provide a new technical solution for oxygen-storing cigarette paper that can avoid the use of combustion accelerants.

[0007] According to a first aspect of the present invention, a method for preparing oxygen-storing cigarette paper is provided.

[0008] The preparation method of this oxygen-storing cigarette paper includes the following steps:

[0009] Step (1): The wood pulp raw material is subjected to pulping and beating to obtain pulp;

[0010] Step (2): Mix oxygen storage material, cyclodextrin and water at a mass ratio of 1:1:(45-55), and stir at 800-1000 rpm for 40-60 minutes at a temperature of 60-80℃ to obtain oxygen storage solution;

[0011] Step (3): Mix the slurry, calcium carbonate and oxygen storage solution at a mass ratio of (60-75):25:(90-110) to obtain a mixed slurry;

[0012] Step (4): Vacuum dewatering treatment is performed on the mixed slurry, and the vacuum degree is controlled at 10. -3 ~10 -2 Pa, to obtain a preformed paper, wherein the two surface layers of the preformed paper are an oxygen storage layer and a porous layer, respectively;

[0013] Step (5): The preformed paper undergoes a first drying process, sizing process, a second drying process, and rewinding process to obtain oxygen-storing cigarette paper.

[0014] Optionally, the wood pulp raw materials in step (1) include softwood pulp, hardwood pulp and hemp pulp in a mass ratio of 3:6:1.

[0015] Optionally, the oxygen storage material in step (2) is a metal oxide.

[0016] Optionally, the metal oxide is at least one of cerium oxide and zirconium oxide.

[0017] Optionally, the moisture content of the preformed paper in step (4) is 65%-75%.

[0018] Optionally, the temperature of the first drying process in step (5) is 80°C, and the moisture content of the paper after the first drying process is 45%-55%.

[0019] The temperature of the secondary drying process is 110℃, and the moisture content of the paper after the secondary drying process is greater than or equal to 4% and less than or equal to 7%.

[0020] Optionally, the adhesive application process in step (5) is as follows:

[0021] A water-soluble adhesive is applied to paper after a single drying process, wherein the water-soluble adhesive is composed of guar gum, starch and water in a mass ratio of (4-8):(1-2):(95-90).

[0022] According to a second aspect of the present invention, an oxygen-storing cigarette paper is provided.

[0023] The oxygen-storing cigarette paper is prepared by the preparation method described in this application.

[0024] According to a third aspect of the present invention, an application of the oxygen-storing cigarette paper described herein is provided in the field of combustible cigarettes.

[0025] The cigarette paper of the present invention directly adds calcium carbonate and oxygen-storing liquid during the pulping process, thereby eliminating the need for additional combustion aids, avoiding the adverse effects of adding combustion aids, saving costs, and simplifying the cigarette paper preparation process. Detailed Implementation

[0026] Various exemplary embodiments of the present invention will now be described in detail. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0027] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0028] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0029] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0030] The method for preparing oxygen-storing cigarette paper provided in this application includes the following steps:

[0031] Step (1): The wood pulp raw material is subjected to pulping and beating to obtain pulp.

[0032] The wood pulp raw materials in step (1) may include softwood pulp, hardwood pulp and hemp pulp in a mass ratio of 3:6:1.

[0033] Softwood pulp has long, wide fibers with thick cell walls, resulting in poor air permeability but good longitudinal tensile strength. Hardwood pulp has fine, short fibers with a loose structure, good air permeability and opacity, but poor longitudinal tensile strength. Hemp pulp has long fibers, high fiber content, low ash content, and good air permeability and combustibility. By controlling the ratio of softwood pulp, hardwood pulp, and hemp pulp at 3:6:1, the resulting cigarette paper exhibits optimal air permeability and combustibility.

[0034] Step (2): Mix the oxygen storage material, cyclodextrin and water at a mass ratio of 1:1:(45-55), and stir at 800-1000 rpm for 40-60 minutes at a temperature of 60-80℃ to obtain the oxygen storage solution.

[0035] Cyclodextrin has a cup-shaped structure that is hydrophilic on the outside and hydrophobic on the inside. Under the above-mentioned temperature, speed and stirring time conditions, it can fully encapsulate and load oxygen storage materials (especially metal oxides), increase their solubility and make the liquid system more uniform.

[0036] The oxygen storage material in step (2) can be a metal oxide.

[0037] Furthermore, the metal oxide is at least one of cerium oxide and zirconium oxide.

[0038] Common oxygen storage materials include metal oxide oxygen storage materials, organic oxygen storage materials, metal-organic framework materials, and chemical oxygen source materials. Cerium oxide and zirconium oxide belong to metal oxide oxygen storage materials and have high oxygen storage density and stability. Organic oxygen storage materials have poor thermal stability; metal-organic framework materials are costly and impractical; chemical oxygen source materials are mostly suitable for large-volume, long-term oxygen supply applications (such as diving equipment) but not for the cigarette industry.

[0039] Step (3): Mix the slurry, calcium carbonate and oxygen storage solution in a mass ratio of (60-75):25:(90-110) to obtain a mixed slurry.

[0040] Step (4): Vacuum dewatering treatment is performed on the mixed slurry, and the vacuum degree is controlled at 10. -3 ~10 -2 Pa yields a preformed paper, wherein the two surface layers of the preformed paper are an oxygen storage layer and a porous layer, respectively.

[0041] In order to enable the mixed pulp to separate into an oxygen storage layer and a porous layer for pre-formed paper during the vacuum dewatering process, this application controls the vacuum degree to 10. -3 ~10 -2 Pa allows calcium carbonate and oxygen storage material in the mixed slurry to be deposited sequentially under the influence of gravity and vacuum, thus obtaining a pre-formed paper with a porous layer and an oxygen storage layer.

[0042] The moisture content of the preformed paper in step (4) can be 65%-75%.

[0043] Step (5): The preformed paper undergoes a first drying process, sizing process, a second drying process, and rewinding process to obtain oxygen-storing cigarette paper.

[0044] The temperature of the first drying process in step (5) can be 80°C, and the moisture content of the paper after the first drying process can be 45%-55%.

[0045] The temperature for the secondary drying process can be 110℃, and the moisture content of the paper after the secondary drying process can be greater than or equal to 4% and less than or equal to 7%.

[0046] By controlling the temperature of the secondary drying process to be higher than that of the primary drying process, not only can moisture be removed more effectively, but the adhesion between the adhesive and the preformed paper in the sizing process can also be improved.

[0047] The adhesive application process in step (5) can be specifically described as follows:

[0048] A water-soluble adhesive solution is applied to paper after a single drying process. The water-soluble adhesive solution consists of guar gum, starch, and water in a mass ratio of (4-8):(1-2):(95-90).

[0049] The adhesive in this application does not contain any combustion accelerants, thus avoiding the adverse effects of adding combustion accelerants.

[0050] The oxygen-storing cigarette paper provided in this application is prepared by the preparation method of this application.

[0051] The oxygen-storing cigarette paper of this application can be used in the field of combustible cigarettes.

[0052] Unless otherwise specified, the experimental methods used in the following examples are conventional methods, and the materials and reagents used are commercially available. Unless otherwise specified, the equipment used in the experiments is well known to those skilled in the art.

[0053] Example

[0054] According to the mass ratio, 30% coniferous wood pulp, 60% broadleaf wood pulp and 10% hemp pulp are mixed and then subjected to pulping and beating processes to obtain pulp.

[0055] Cerium oxide, cyclodextrin and water were mixed in a mass ratio of 1:1:50 and stirred at 800 rpm for 60 minutes at 70°C to obtain an oxygen storage solution.

[0056] The slurry, calcium carbonate, and oxygen storage solution are mixed at a mass ratio of 60:25:100 to obtain a mixed slurry.

[0057] The mixed slurry was subjected to vacuum dewatering at a vacuum degree of 0.01 Pa to obtain pre-formed paper;

[0058] The pre-formed paper is first dried at 80°C, then a 1wt‰ guar gum solution is applied (relative to the pre-formed paper), and then dried a second time at 100°C until the paper moisture content is 5%. After rewinding and slitting, oxygen-storing cigarette paper is obtained.

[0059] Comparative Example

[0060] The raw materials, consisting of 30% coniferous wood, 60% broadleaf wood, and 10% hemp pulp, were mixed, crushed, and beaten to obtain pulp.

[0061] The slurry and calcium carbonate are mixed at a mass ratio of 85:15 to obtain a mixed slurry.

[0062] The mixed pulp was subjected to negative pressure dewatering treatment at a vacuum degree of 0.01 Pa to obtain preformed paper.

[0063] The pre-formed paper is first dried at 80°C, then a 1wt‰ guar gum (relative to the pre-formed paper) and 0.5wt‰ potassium citrate (relative to the pre-formed paper) combustion aid solution is applied, and then dried a second time at 100°C until the paper moisture content is 5%. After rewinding and slitting, conventional cigarette paper is obtained.

[0064] Cigarettes are made using oxygen-storing cigarette paper and regular cigarette paper.

[0065] The main indicators of oxygen-storing cigarette paper, conventional cigarette paper, and corresponding cigarette samples are shown in Table 1. As can be seen from Table 1, compared with the comparative example, the oxygen-storing cigarette paper burns faster and produces lower tar in the cigarettes, demonstrating a superior tar reduction effect.

[0066] Table 1 Sample Test Data

[0067]

[0068] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A method for the preparation of an oxygen storage cigarette paper, characterized by, The method comprises the following steps: Step (1): performing a pulping treatment and a beating treatment on wood pulp raw materials to obtain pulp, the wood pulp raw materials comprising coniferous wood pulp, broadleaf wood pulp and hemp pulp at a mass ratio of 3:6:1; Step (2): mixing an oxygen storage material, a cyclodextrin and water at a mass ratio of 1:1:(45-55), stirring at a speed of 800-1000 revolutions per minute for 40-60 minutes at a temperature of 60-80 DEG C to obtain an oxygen storage liquid, the oxygen storage material being a metal oxide, the metal oxide being at least one of cerium oxide and zirconium oxide; Step (3): mixing the pulp, calcium carbonate and the oxygen storage liquid at a mass ratio of (60-75):25:(90-110) to obtain mixed pulp; Step (4): vacuum dewatering treatment is performed on the mixed slurry, and the vacuum degree is controlled to be 10 -3 ~ 10 -2 Pa, to obtain a preformed paper, wherein two surface layers of the preformed paper are an oxygen storage layer and a porous layer, respectively; Step (5): performing a first drying treatment, a sizing treatment, a second drying treatment and a rewinding treatment on the preformed paper to obtain the oxygen storage cigarette paper, wherein the temperature of the first drying treatment is 80 DEG C, and the water content of the paper after the first drying treatment is 45%-55%, the temperature of the second drying treatment is 110 DEG C, and the water content of the paper after the second drying treatment is greater than or equal to 4% and less than or equal to 7%; The sizing treatment specifically comprises the following steps: brushing a water-soluble glue solution on the paper after the first drying treatment, wherein the water-soluble glue solution is composed of guar gum, starch and water at a mass ratio of (4-8):(1-2):(95-90).

2. The production method according to claim 1, characterized by, The water content of the preformed paper in step (4) is 65%-75%.

3. An oxygen-storing cigarette paper, characterized in that, Prepared by the preparation method of claim 1 or 2.

4. Use of the oxygen storage cigarette paper of claim 3 in the field of combustible cigarettes.

Images