CN112663395A - Preparation method of tobacco base material for heating non-combustible cigarettes - Google Patents
Preparation method of tobacco base material for heating non-combustible cigarettes Download PDFInfo
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Abstract
The invention discloses a preparation method of a tobacco base material of a cigarette which is not burnt by heating, comprising the following steps: pulping the raw materials, and making into wet paper sheets; crushing tobacco leaves into tobacco powder, applying the tobacco powder to the lower surface of wet paper on a blanket before entering a Yankee cylinder, and drying to obtain a sheet base; coating the film base to obtain reconstituted tobacco; carrying out soft pressing treatment on the reconstituted tobacco; carrying out hard pressing treatment on the reconstituted tobacco; performing single-side or double-side glue application treatment on the compacted reconstituted tobacco; and drying the sized reconstituted tobacco to obtain the tobacco base material of the cigarette which is not burnt when being heated. The method can effectively improve the tensile strength and the tearing strength of the tobacco base material, reduce the moisture absorption and improve the subsequent processing resistance; the method is also favorable for improving the density of the base material, thereby increasing the content of the core material of the cigarette, optimizing the thermal conductivity of the core material after being rolled, improving the release amount of the smoke of a single mouth, the total number of suction openings and the mouth-by-mouth stability, and comprehensively improving the sensory quality of the cigarette which is not combusted by heating.
Description
Technical Field
The invention relates to the field of reconstituted tobacco, in particular to a preparation method of a tobacco base material for heating non-combustible cigarettes.
Background
The cigarette is a novel tobacco product, the tobacco base material is heated by an external heat source, and the atomized medium, the flavor components and the additional flavor in the tobacco base material are volatilized to generate smoke similar to the smoke of the traditional cigarette, so that the consumers can obtain physiological satisfaction. The cigarette is heated to 300 deg.C, so that it can be smoked only by heating and can not burn. However, compared with the traditional cigarette, the cigarette which is not burnt after being heated has the problems of small smoke quantity, insufficient aroma and poor sensory perception.
The existing tobacco base material for heating the non-burning cigarette is reconstituted tobacco prepared by a paper-making method. The production process of the reconstituted tobacco prepared by the paper-making method is stable and mature, but compared with the tobacco base material prepared by the thick pulp method and the rolling method, the reconstituted tobacco has the defects of low content of tobacco aroma substances and low density, and the defects of poor sensory quality, small number of suction openings and poor mouth-by-mouth stability are caused. In addition, the reconstituted tobacco prepared by the paper-making method also has the problems of quick moisture absorption, poor strength and the like, and the processing difficulty is increased.
Therefore, how to provide a tobacco base material which is high in tobacco aroma substance content, high in density and good in processability and can not burn cigarettes by heating becomes a technical problem which needs to be solved in the field.
Disclosure of Invention
The invention aims to provide a novel technical scheme for a preparation method of a tobacco base material of a cigarette which is not burnt by heating and has high content of tobacco aroma substances, high density and good processability.
According to a first aspect of the present invention, there is provided a method of preparing a tobacco substrate for heating a non-burning cigarette.
The preparation method of the tobacco base material of the cigarette without burning by heating comprises the following steps:
step (1): pulping the raw materials, and making into wet paper sheets;
step (2): crushing tobacco leaves into tobacco powder, applying the tobacco powder to the lower surface of wet paper on a blanket before entering a Yankee cylinder, and drying to obtain a sheet base, wherein the application amount of the tobacco powder is 4-10% of the weight of the wet paper;
and (3): coating the film base to obtain reconstituted tobacco;
and (4): carrying out soft pressing treatment on the reconstituted tobacco;
and (5): carrying out hard pressing treatment on the reconstituted tobacco;
and (6): performing single-side or double-side glue application treatment on the compacted reconstituted tobacco;
and (7): and drying the sized reconstituted tobacco to obtain the tobacco base material of the cigarette which is not burnt when being heated.
Optionally, the raw materials in the step (1) include tobacco raw materials and plant fibers, the tobacco raw materials include at least one of tobacco stems, tobacco fragments and tobacco powder, and the raw materials of the plant fibers include needle-leaved wood, hemp and Chinese alpine rush, wherein the mass ratio of the tobacco raw materials to the plant fibers is (1-4): 20.
Optionally, the length of the plant fiber is greater than 1.5 mm.
Optionally, the moisture content of the tobacco leaves in the step (2) is less than 12%, the particle size of the tobacco powder is 150-400 meshes, and the temperature in the tobacco leaf crushing process is controlled to be less than 40 ℃.
Optionally, the step (3) is specifically as follows:
step (3-1): concentrating the tobacco extract obtained in the raw material pulping process in the step (1) to obtain a tobacco extract concentrated solution, and adding at least one of a tobacco alcohol extract and a tobacco supercritical extract, an atomizing agent and an essence perfume into the tobacco extract concentrated solution to obtain a coating liquid;
step (3-2): coating the coating liquid on the sheet base at a coating rate of 40-60%, and applying an alcohol-precipitated tobacco concentrated solution obtained by concentrating the tobacco extracting solution subjected to ethanol precipitation treatment on the sheet base, and drying to obtain the reconstituted tobacco, wherein the moisture content of the reconstituted tobacco is 15-20%.
Optionally, the mass ratio of the tobacco alcohol extract to the tobacco extract concentrate in the step (3-1) is (1-4):20, the mass ratio of the tobacco supercritical extract to the tobacco extract concentrate is (1-5):100, and the mass ratio of the atomizing agent to the tobacco extract concentrate is (2-5): 20;
the mass ratio of the ethanol to the tobacco extract in the step (3-2) is (1-1.5):1, the temperature of the alcohol precipitation tobacco concentrated solution is 50-60 ℃, and the application amount of the alcohol precipitation tobacco concentrated solution and the dry weight ratio of the tobacco sheet base are (2-5): 50.
Optionally, the line pressure of the soft pressing treatment in the step (4) is 40-100 KN/m.
Optionally, the line pressure of the hard pressing treatment in the step (5) is 30KN/m-80 KN/m.
Optionally, in the step (6), polyvinyl alcohol is adopted for sizing treatment, and the sizing amount of one side is 1g/m2-2g/m2。
Optionally, the step (7) is specifically as follows:
step (7-1): drying the glue-applied reconstituted tobacco leaves once through a tunnel type drying oven, so that the moisture content of the reconstituted tobacco leaves is reduced to 20% -25%;
step (7-2): and (3) carrying out secondary drying treatment on the reconstituted tobacco subjected to the primary drying treatment through a drying cylinder, so that the moisture content of the reconstituted tobacco is reduced to be less than 10%, and thus the tobacco base material for heating the non-burning cigarettes is obtained.
The preparation method of the tobacco base material of the cigarette which is not burnt by heating can effectively improve the tensile strength and the tearing strength of the tobacco base material, reduce the moisture absorption and improve the subsequent processing resistance; the method is also favorable for improving the density of the base material, thereby increasing the content of the core material of the cigarette, optimizing the thermal conductivity of the core material after being rolled, improving the release amount of the smoke of a single mouth, the total number of suction openings and the mouth-by-mouth stability, and comprehensively improving the sensory quality of the cigarette which is not combusted by heating.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
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.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
The present disclosure provides a method for preparing a tobacco substrate for heating a non-burning cigarette, comprising the following steps:
step (1): pulping the raw materials, and making into wet paper sheets.
In order to improve the strength of the sheet base, the raw materials in the step (1) comprise tobacco raw materials and plant fibers, the tobacco raw materials comprise at least one of tobacco stems, tobacco fragments and tobacco powder, and the raw materials of the plant fibers comprise needle-leaved wood, hemp and Chinese alpine rush. The mass ratio of the tobacco raw material to the plant fiber is (1-4) to 20.
In specific implementation, the tobacco raw material and the plant fiber are mixed and pulped.
To further increase the strength of the substrate, the length of the plant fibres may be greater than 1.5 mm.
Step (2): the tobacco leaves are crushed into tobacco powder and then applied to the lower surface of wet paper on a blanket before entering a Yankee cylinder, and the base piece is obtained after drying, wherein the application amount of the tobacco powder is 4-10% of the weight of the wet paper. The soot applied to the wet paper sheet may be firmly adhered to the lower surface of the wet paper sheet after pressing and drying.
In order to effectively improve the content of the tobacco aroma substances of the tobacco sheet base, the moisture content of the tobacco leaves in the step (2) is less than 12 percent, the particle size of the tobacco powder is 150-400 meshes, and the temperature in the process of crushing the tobacco leaves is controlled to be less than 40 ℃. In specific implementation, high-quality tobacco leaves can be selected to prepare the tobacco powder. In addition, the application of the tobacco powder can be realized by adopting an air flow conveying powder spraying mode.
And (3): and coating the film base to obtain the reconstituted tobacco.
In order to more effectively improve the content of the tobacco aroma substances of the tobacco sheet base, the step (3) is specifically as follows:
step (3-1): concentrating the tobacco extract obtained in the raw material pulping process in the step (1) to obtain a tobacco extract concentrated solution, and adding at least one of a tobacco alcohol extract and a tobacco supercritical extract, an atomizing agent and an essence perfume into the tobacco extract concentrated solution to obtain a coating liquid. The density of the concentrated tobacco extract solution can be 1.18g/cm3-1.28g/cm3. The nebulant may consist of glycerol and propylene glycol. The types and the addition amount of the essence and the spice can be flexibly selected according to actual requirements.
The mass ratio of the tobacco alcohol extract to the tobacco extract concentrated solution in the step (3-1) is (1-4):20, the mass ratio of the tobacco supercritical extract to the tobacco extract concentrated solution is (1-5):100, and the mass ratio of the atomizing agent to the tobacco extract concentrated solution is (2-5): 20.
Step (3-2): coating the coating liquid on the sheet base at a coating rate of 40-60%, and applying an alcohol-precipitated tobacco concentrated solution obtained by concentrating the tobacco extracting solution subjected to ethanol precipitation treatment on the sheet base, and drying to obtain the reconstituted tobacco, wherein the moisture content of the reconstituted tobacco is 15-20%. The moisture content of the reconstituted tobacco is controlled to be 15% -20%, so that the characteristic that the plasticity of fibers is strong when the moisture is large is utilized, and the strength and tightness of the reconstituted tobacco subjected to subsequent soft pressing and hard pressing treatment are improved.
The density of the alcohol-precipitated tobacco concentrate can be 1.18g/cm3-1.28g/cm3. When the method is specifically implemented, the alcohol-precipitated tobacco concentrated solution can be uniformly sprayed on the film base coated with the coating liquid by adopting a fan-shaped nozzle, so that the content of the tobacco aroma substances is further improved.
The mass ratio of the ethanol to the tobacco extract in the step (3-2) is (1-1.5):1, the temperature of the alcohol precipitation tobacco concentrated solution is 50-60 ℃, and the application amount of the alcohol precipitation tobacco concentrated solution and the dry weight ratio of the tobacco sheet base are (2-5): 50.
And (4): and carrying out soft pressing treatment on the reconstituted tobacco.
In order to more effectively control the strength of the reconstituted tobacco, the line pressure of the soft pressing treatment in the step (4) is 40KN/m to 100 KN/m. The soft-pressing treatment can be realized by using a polyurethane roller.
And (5): and carrying out hard pressing treatment on the reconstituted tobacco.
In order to more effectively control the strength of the reconstituted tobacco, the line pressure of the hard pressing treatment in the step (5) is 30KN/m to 80 KN/m. The hard-pressing treatment can be realized by using a steel roller.
And (6): and (3) performing single-side or double-side glue application treatment on the compacted reconstituted tobacco.
In order to more effectively reduce the moisture absorption of the tobacco base material, the sizing treatment is carried out by using polyvinyl alcohol in the step (6), and the sizing amount of one side is 1g/m2-2g/m2. That is, if the single-side sizing treatment is selected for the reconstituted tobacco after compaction, the total sizing amount of the reconstituted tobacco is 1g/m2-2g/m2(ii) a If the reconstituted tobacco after compaction is selected to be subjected to double-sided sizing treatment, the total sizing amount of the reconstituted tobacco is 2g/m2-4g/m2。
And (7): and drying the sized reconstituted tobacco to obtain the tobacco base material of the cigarette which is not burnt when being heated.
In order to more effectively improve the sensory quality of the cigarette which is not burnt by heating, the step (7) is specifically as follows:
step (7-1): and (3) carrying out primary drying treatment on the glue-applied reconstituted tobacco through a tunnel type drying oven, so that the moisture content of the reconstituted tobacco is reduced to 20-25%.
Step (7-2): and (3) carrying out secondary drying treatment on the reconstituted tobacco subjected to the primary drying treatment through a drying cylinder, so that the moisture content of the reconstituted tobacco is reduced to be less than 10%, and thus the tobacco base material for heating the non-burning cigarettes is obtained.
In practical application, the tobacco base material of the cigarette which is not burned can be cut and packaged under the conditions of constant temperature and constant humidity (the temperature under the conditions of constant temperature and constant humidity is 15-25 ℃, and the relative humidity is 35-45%).
The experimental procedures used in the examples below are conventional unless otherwise specified, the materials and reagents used therein are commercially available, and the equipment used in the experiments are well known to those skilled in the art without otherwise specified.
Example 1
Mixing a tobacco raw material and a needle-leaved wood board accounting for 15% of the mass of the tobacco raw material for pulping, and papermaking to obtain wet paper sheets;
crushing tobacco leaves with the moisture content of 10% into tobacco powder of 200 meshes at 20 ℃, applying the tobacco powder on the lower surface of wet paper sheets on a blanket before entering a Yankee cylinder in an application amount of 5 wt% after the tobacco leaves are crushed into the tobacco powder, and drying to obtain a sheet base;
adding 2 wt% of tobacco supercritical extract, an atomizing agent and essence and spice into the tobacco extract concentrated solution to prepare a coating solution, coating the coating solution on a sheet base at a coating rate of 51%, then heating the ethanol-precipitated concentrated solution obtained after concentrating the extracting solution precipitated by 1:1 ethanol to 60 ℃, applying the heated ethanol-precipitated concentrated solution on the sheet base, wherein the application amount of the ethanol-precipitated concentrated solution is 5% (dry weight ratio) of the sheet base, and drying until the moisture content is 16% to obtain the reconstituted tobacco;
reeling the reconstituted tobacco by adopting an automatic rewinding machine and storing the reconstituted tobacco in a sealing way;
the stored reconstituted tobacco is taken and is subjected to soft pressing (line pressure is 60KN/m) by a polyurethane roller and hard pressing (line pressure is 40KN/m) by a steel roller after being unreeled;
carrying out polyvinyl alcohol double-sided sizing treatment on the compacted reconstituted tobacco leaves, wherein the total sizing amount is 2.5g/m2；
Drying the glue-applied reconstituted tobacco leaves in a tunnel manner to reduce the water content to 20%, and drying the tobacco leaves in a drying cylinder to 8%;
and cutting the dried reconstituted tobacco under the conditions of constant temperature and constant humidity (the temperature is 20 ℃ and the relative humidity is 40 percent), and packaging to obtain the tobacco base material S1 for preparing the non-combustible cigarette.
Comparative example 1
Pulping the tobacco raw material, and making a wet paper sheet by adopting a papermaking method;
adding an atomizing agent and essence and spice into the tobacco extract concentrated solution to prepare a coating solution, coating the coating solution on the sheet base at a coating rate of 51%, and drying until the moisture content is 16% to obtain the reconstituted tobacco;
reeling the reconstituted tobacco by an automatic rewinding machine, storing in a sealed manner, and drying until the moisture content is 8%;
and cutting the dried reconstituted tobacco under constant temperature and humidity conditions (the temperature is 20 ℃ and the relative humidity is 40%) and packaging to obtain the tobacco base material D1 for preparing the non-combustible heated cigarette.
And (3) rolling the tobacco base material S1 of the prepared heating non-burning cigarette and the tobacco base material D1 of the heating non-burning cigarette prepared by the conventional method into the heating non-burning cigarette, and performing detection and smoking evaluation. As shown in table 1, the tobacco substrate S1 of the conditioned non-burning cigarette had significantly improved grammage, density and tensile strength, and improved smoke release per puff, total puff count and puff-by-puff stability.
TABLE 1
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may 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 (10)
1. A preparation method of a tobacco substrate of a cigarette which is not combusted by heating is characterized by comprising the following steps:
step (1): pulping the raw materials, and making into wet paper sheets;
step (2): crushing tobacco leaves into tobacco powder, applying the tobacco powder to the lower surface of wet paper on a blanket before entering a Yankee cylinder, and drying to obtain a sheet base, wherein the application amount of the tobacco powder is 4-10% of the weight of the wet paper;
and (3): coating the film base to obtain reconstituted tobacco;
and (4): carrying out soft pressing treatment on the reconstituted tobacco;
and (5): carrying out hard pressing treatment on the reconstituted tobacco;
and (6): performing single-side or double-side glue application treatment on the compacted reconstituted tobacco;
and (7): and drying the sized reconstituted tobacco to obtain the tobacco base material of the cigarette which is not burnt when being heated.
2. The method for preparing a tobacco substrate for a heated non-combustible cigarette according to claim 1, wherein the raw material in the step (1) comprises a tobacco raw material and plant fiber, the tobacco raw material comprises at least one of tobacco stems, tobacco fragments and tobacco powder, the raw material of the plant fiber comprises softwood, hemp and devil's rush, and the mass ratio of the tobacco raw material to the plant fiber is (1-4): 20.
3. The method of claim 2, wherein the plant fibers have a length greater than 1.5 mm.
4. The method for preparing tobacco base material for cigarette with heating and non-combustion as claimed in claim 1, wherein the moisture content of the tobacco leaves in the step (2) is less than 12%, the particle size of the tobacco powder is 150-400 mesh, and the temperature in the process of crushing the tobacco leaves is controlled to be less than 40 ℃.
5. The method for preparing a tobacco substrate for a heated non-combustible cigarette according to claim 1, wherein the step (3) is as follows:
step (3-1): concentrating the tobacco extract obtained in the raw material pulping process in the step (1) to obtain a tobacco extract concentrated solution, and adding at least one of a tobacco alcohol extract and a tobacco supercritical extract, an atomizing agent and an essence perfume into the tobacco extract concentrated solution to obtain a coating liquid;
step (3-2): coating the coating liquid on the sheet base at a coating rate of 40-60%, and applying an alcohol-precipitated tobacco concentrated solution obtained by concentrating the tobacco extracting solution subjected to ethanol precipitation treatment on the sheet base, and drying to obtain the reconstituted tobacco, wherein the moisture content of the reconstituted tobacco is 15-20%.
6. The method for preparing the tobacco substrate of the cigarette without burning by heating according to claim 5, wherein the mass ratio of the tobacco alcohol extract to the tobacco extract concentrate in the step (3-1) is (1-4) to 20, the mass ratio of the tobacco supercritical extract to the tobacco extract concentrate is (1-5) to 100, and the mass ratio of the atomizing agent to the tobacco extract concentrate is (2-5) to 20;
the mass ratio of the ethanol to the tobacco extract in the step (3-2) is (1-1.5):1, the temperature of the alcohol precipitation tobacco concentrated solution is 50-60 ℃, and the application amount of the alcohol precipitation tobacco concentrated solution and the dry weight ratio of the tobacco sheet base are (2-5): 50.
7. The method for producing a tobacco substrate for a heated non-combustible cigarette according to claim 1, wherein the line pressure of the soft-pressing treatment in the step (4) is 40 to 100 KN/m.
8. The method for producing a tobacco substrate for a heated non-combustible cigarette according to claim 1, wherein the line pressure of the hard-pressing treatment in the step (5) is 30 to 80 KN/m.
9. The method for producing a tobacco substrate for a cigarette not burning when heated according to claim 1, wherein the sizing treatment is carried out with polyvinyl alcohol in the step (6), and the sizing amount on one side is 1g/m2-2g/m2。
10. The method for preparing a tobacco substrate for a heated non-combustible cigarette according to claim 1, wherein the step (7) is as follows:
step (7-1): drying the glue-applied reconstituted tobacco leaves once through a tunnel type drying oven, so that the moisture content of the reconstituted tobacco leaves is reduced to 20% -25%;
step (7-2): and (3) carrying out secondary drying treatment on the reconstituted tobacco subjected to the primary drying treatment through a drying cylinder, so that the moisture content of the reconstituted tobacco is reduced to be less than 10%, and thus the tobacco base material for heating the non-burning cigarettes is obtained.
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| CN112663395B (en) | 2022-11-29 |
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