Oxygen storage cigarette paper as well as preparation method and application thereof

Abstract

The invention discloses oxygen storage cigarette paper as well as a preparation method and application thereof, and the preparation method comprises the following steps: carrying out repulping treatment and pulping treatment on a wood pulp raw material to obtain pulp; mixing an oxygen storage material, cyclodextrin and water to obtain an oxygen storage material liquid; mixing the slurry, calcium carbonate and oxygen storage feed liquid to obtain mixed slurry; carrying out vacuum dehydration treatment on the mixed pulp to obtain preformed paper; performing primary drying treatment, sizing treatment, secondary drying treatment and rewinding treatment on the preformed paper to obtain the oxygen storage cigarette paper. According to the cigarette paper, the calcium carbonate and the oxygen storage feed liquid are directly added in the pulp preparation process, so that a combustion improver does not need to be additionally added, adverse effects caused by addition of the combustion improver are avoided, the cost is saved, and the preparation process of the cigarette paper is simplified.

Description

Technical Field

[0001] The present invention relates to the field of cigarette manufacturing, and more specifically, to oxygen storage cigarette paper and a preparation method and application thereof. Background Art

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

[0004] However, combustion aids are chemical reagents (for example, potassium nitrate, sodium nitrate, potassium citrate, etc.), which 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 body.

[0005] Therefore, how to provide a cigarette paper that can avoid the use of combustion aids has become a technical problem to be solved in the art. Summary of the invention

[0006] An object of the present invention is to provide a new technical solution for oxygen storage cigarette paper which can avoid the use of combustion aids.

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

[0008] The preparation method of the oxygen storage cigarette paper comprises the following steps:

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

[0010] Step (2): mixing the oxygen storage material, cyclodextrin and water in a mass ratio of 1:1:(45-55), stirring at a temperature of 60 to 80° C. and a speed of 800 to 1000 rpm for 40 to 60 minutes to obtain an oxygen storage liquid;

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

[0012] Step (4): vacuum dehydration treatment is performed on the mixed slurry, and the vacuum degree is controlled to 10 -3 ~10 -2 Pa, obtaining 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): subjecting the preformed paper to a primary drying process, a sizing process, a secondary drying process and a rewinding process, thereby obtaining oxygen storage cigarette paper.

[0014] Optionally, the wood pulp raw material in step (1) includes coniferous wood pulp, hardwood wood 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 primary drying treatment in step (5) is 80° C., and the moisture content of the paper after the primary drying treatment is 45%-55%;

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

[0020] Optionally, the sizing treatment in step (5) is specifically as follows:

[0021] A water-soluble glue solution is applied on the paper after the primary drying treatment, wherein the water-soluble glue solution 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 storage cigarette paper is provided.

[0023] The oxygen storage cigarette paper is prepared by the preparation method described in the present application.

[0024] According to a third aspect of the present invention, there is provided a use of the oxygen storage cigarette paper described in the present application in the field of combustible cigarettes.

[0025] The cigarette paper of the present invention directly adds calcium carbonate and oxygen storage liquid during the slurry preparation process, thereby eliminating the need to add additional combustion aids, avoiding the adverse effects of adding combustion aids, saving costs, and simplifying the preparation process of the cigarette paper. DETAILED DESCRIPTION

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

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

[0028] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

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

[0030] The preparation method of the oxygen storage cigarette paper provided in the present application comprises the following steps:

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

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

[0033] The fiber of coniferous wood pulp is long and wide, with thick cell wall, poor air permeability and good longitudinal tension. The fiber of broadleaf wood pulp is thin and short, with loose structure, good air permeability and opacity, and poor longitudinal tension. The fiber of hemp pulp is long, with high fiber content, low ash content, good air permeability and combustibility. By controlling the ratio of coniferous wood pulp, broadleaf wood pulp and hemp pulp to 3:6:1, the air permeability and combustibility of the obtained cigarette paper are optimized.

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

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

[0036] The oxygen storage material in step (2) may 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 are metal oxide oxygen storage materials with high oxygen storage density and stability. Organic oxygen storage materials have poor thermal stability; metal organic framework materials are expensive and have poor practicality; chemical oxygen source materials are mostly suitable for large-scale, long-term oxygen supply application environments (such as diving equipment), but not suitable for the cigarette field.

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

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

[0041] In order to make the mixed slurry separate into oxygen storage layer and porous layer of preformed paper during vacuum dehydration, the present invention controls the vacuum degree to 10 -3 ~10 -2 Pa, so that the calcium carbonate and oxygen storage material in the mixed slurry can be deposited successively under the action of gravity and vacuum, thereby obtaining a preformed paper with a porous layer and an oxygen storage layer layered.

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

[0043] Step (5): subjecting the preformed paper to a primary drying process, a sizing process, a secondary drying process and a rewinding process, thereby obtaining oxygen storage cigarette paper.

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

[0045] The temperature of the secondary drying process may be 110° C., and the moisture content of the paper after the secondary drying process may 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, it is possible not only to better remove moisture but also to improve the bonding between the glue solution and the preformed paper in the sizing process.

[0047] The sizing treatment in step (5) can be specifically as follows:

[0048] A water-soluble glue solution is applied on the paper after a drying process, wherein the water-soluble glue solution is composed of guar gum, starch and water in a mass ratio of (4-8):(1-2):(95-90).

[0049] The glue in the present application does not contain any combustion aid, thus avoiding the adverse effects of adding the combustion aid.

[0050] The oxygen storage cigarette paper provided in the present application is prepared by the preparation method of the present application.

[0051] The oxygen storage cigarette paper of the present application can be applied to the field of combustible cigarettes.

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

[0053] Example

[0054] 30% of softwood pulp, 60% of hardwood pulp and 10% of hemp pulp are mixed according to the mass ratio, and then pulped and beaten 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 min at 70° C. to obtain an oxygen storage solution;

[0056] The slurry, calcium carbonate and oxygen storage liquid are mixed in a mass ratio of 60:25:100 to obtain a mixed slurry;

[0057] The mixed slurry is subjected to vacuum dehydration treatment at a vacuum degree of 0.01 Pa to obtain a preformed paper;

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

[0059] Comparative Example

[0060] 30% of softwood, 60% of hardwood and 10% of hemp pulp raw materials are mixed, pulped and beaten to obtain pulp;

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

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

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

[0064] Cigarettes are rolled using oxygen storage cigarette paper and conventional cigarette paper.

[0065] The main indicators of oxygen storage 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 storage cigarette paper of the embodiment burns faster, has lower tar in the cigarette, and has a better tar reduction effect.

[0066] Table 1 Sample test data table

[0067]

[0068] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A method for preparing oxygen storage cigarette paper, characterized in that: The steps include: Step (1): pulping and beating the wood pulp raw material to obtain pulp; Step (2): mixing the oxygen storage material, cyclodextrin and water in a mass ratio of 1:1:(45-55), stirring at a temperature of 60 to 80° C. and a speed of 800 to 1000 rpm for 40 to 60 minutes to obtain an oxygen storage liquid; Step (3): mixing the slurry, calcium carbonate and oxygen storage liquid in a mass ratio of (60-75):25:(90-110) to obtain a mixed slurry; Step (4): vacuum dehydration treatment is performed on the mixed slurry, and the vacuum degree is controlled to 10 -3 ~10 -2 Pa, obtaining a preformed paper, wherein the two surface layers of the preformed paper are an oxygen storage layer and a porous layer respectively; Step (5): subjecting the preformed paper to a primary drying process, a sizing process, a secondary drying process and a rewinding process, thereby obtaining oxygen storage cigarette paper.

2. The preparation method according to claim 1, characterized in that: The wood pulp raw material in step (1) includes coniferous wood pulp, hardwood wood pulp and hemp pulp in a mass ratio of 3:6:

1.

3. The preparation method according to claim 1, characterized in that: The oxygen storage material in step (2) is a metal oxide.

4. The preparation method according to claim 3, characterized in that: The metal oxide is at least one of cerium oxide and zirconium oxide.

5. The preparation method according to claim 1, characterized in that: The moisture content of the preformed paper in step (4) is 65%-75%.

6. The preparation method according to claim 1, characterized in that: The temperature of the primary drying treatment in step (5) is 80° C., and the moisture content of the paper after the primary drying treatment is 45%-55%; The temperature of the secondary drying treatment is 110° C., and the moisture content of the paper after the secondary drying treatment is greater than or equal to 4% and less than or equal to 7%.

7. The preparation method according to claim 1, characterized in that: The sizing process in step (5) is specifically as follows: A water-soluble glue solution is applied on the paper after a drying process, wherein the water-soluble glue solution is composed of guar gum, starch and water in a mass ratio of (4-8):(1-2):(95-90).

8. An oxygen storage cigarette paper, characterized in that: Prepared by the preparation method according to any one of claims 1 to 7.

9. Use of the oxygen storage cigarette paper according to claim 8 in the field of combustible cigarettes.

Images