A method of making paper by a papermaking process

Abstract

The present application relates to the technical field of paper-making method reconstituted tobacco production, in particular to a paper-making method reconstituted tobacco and a preparation method thereof. The preparation method of the paper-making method reconstituted tobacco provided by the present application uses the high nicotine content characteristics of the concentrated liquid, evaporates part of the concentrated liquid into solid and then puts it into the production of reconstituted tobacco base sheet, and coats the remaining concentrated liquid on the obtained reconstituted tobacco base sheet, which can significantly improve the nicotine content of the finally obtained paper-making method reconstituted tobacco. The preparation process of the preparation method of the paper-making method reconstituted tobacco provided by the present application mainly uses physical means, which can improve the nicotine content of the reconstituted tobacco without bringing negative effects; and the operation of putting the concentrated liquid back into production also reduces the production cost. The paper-making method reconstituted tobacco obtained by the preparation method provided by the present application has high nicotine content. In the test of the present application, the nicotine content of the paper-making method reconstituted tobacco obtained by the preparation method provided by the present application reaches 1.67% at the lowest and 1.96% at the highest.

Description

Technical Field

[0001] This invention relates to the field of papermaking reconstituted tobacco production technology, specifically a papermaking reconstituted tobacco and its preparation method. Background Technology

[0002] Reconstituted tobacco using the papermaking method is a recycled tobacco product made from tobacco raw materials such as tobacco stems, tobacco dust, and fragments through processes such as extraction, refining, concentration, pulping, papermaking, and coating. It is a cigarette filler used in tobacco formulation design and can effectively improve cigarette quality during the cigarette production process.

[0003] Reconstituted tobacco, as an adjustable cigarette design tool, is often designed with various properties to meet the needs of cigarette formulations. Chinese patent CN113712239A discloses a method for preparing reconstituted tobacco using a high-nicotine papermaking process with Burley tobacco particles as filler to increase the nicotine content of the reconstituted tobacco. However, the addition of Burley tobacco limits the usability of the reconstituted tobacco. Chinese patent CN109090683A discloses a method for increasing the nicotine content of reconstituted tobacco by re-adding a concentrated extract to the coating solution. However, the use of this extract increases the viscosity of the coating solution, making it difficult to penetrate the substrate. Summary of the Invention

[0004] In view of this, the technical problem to be solved by the present invention is a papermaking reconstituted tobacco leaf and its preparation method. The preparation method provided by the present invention can prepare papermaking reconstituted tobacco leaf with high nicotine content.

[0005] This invention provides a method for preparing reconstituted tobacco using a papermaking process, comprising the following steps:

[0006] S1) Extract the tobacco raw material with an extraction solvent, filter and concentrate to obtain a concentrated liquid and the extracted tobacco raw material;

[0007] S2) Evaporate part of the concentrate described in step S1) to obtain a solid concentrate base material;

[0008] The inorganic filler and the solid concentrated substrate are made into a mixed filler;

[0009] S3) The extracted tobacco raw material described in step S1) and the mixed filler described in step S2) are used to make reconstituted tobacco leaf substrate;

[0010] S4) The concentrated liquid described in the remaining step S1) is coated onto the reconstituted tobacco substrate described in step S3) to produce paper-making reconstituted tobacco.

[0011] This invention first extracts tobacco raw materials with an extraction solvent, filters and concentrates the extract to obtain a concentrated solution and extracted tobacco raw materials. Specifically, the tobacco raw materials are extracted with an extraction solvent, then filtered to obtain an extract and extracted tobacco raw materials; the obtained extract is then concentrated to obtain a concentrated solution. The tobacco raw materials of this invention include one or more of tobacco dust, tobacco stems, factory feed, fragments, and tobacco leaves. The mass ratio of the tobacco raw materials to the extraction solvent in this invention is 1:(3~7). In some embodiments of this invention, the tobacco raw materials are extracted with water, the mass ratio of the tobacco raw materials to the water is 1:(3~7), and the temperature of the water is 50℃~90℃.

[0012] After obtaining the concentrated liquid and the extracted tobacco raw material, the extracted tobacco raw material is set aside for later use; a portion of the obtained concentrated liquid is evaporated to obtain a solid concentrated base material, and the remaining concentrated liquid is set aside for later use; the portion of the obtained concentrated liquid accounts for 20-50% of the total concentrated liquid by mass. Evaporating too much concentrated liquid into a solid concentrated base material will result in insufficient concentrated liquid for subsequent coating, affecting production.

[0013] After obtaining the solid concentrated base material, this invention prepares a mixed filler by combining the inorganic filler and the solid concentrated base material. Specifically, the inorganic filler and the solid concentrated base material are mixed and ground to prepare the mixed filler; the ratio of the inorganic filler to the solid concentrated base material is 1:(3~7). The particle size of the mixed filler prepared by this invention is 600 mesh to 1600 mesh. The inorganic filler in this invention is selected from one or more of calcium carbonate, kaolin, and aluminum silicate. The solid concentrated base material has a certain viscosity; without the addition of inorganic filler, grinding the solid concentrated base material will be difficult.

[0014] After obtaining the mixed filler, the present invention uses the aforementioned extracted tobacco raw material and the mixed filler to form reconstituted tobacco leaf substrate. Specifically, the aforementioned extracted tobacco raw material is pulped to obtain a pulp; the mixed filler and the pulp are mixed and subjected to a sizing process, followed by dehydration and drying to obtain reconstituted tobacco leaf substrate. The mixed filler of the present invention accounts for 0.5-2% of the mass of the extracted tobacco raw material.

[0015] After obtaining the reconstituted tobacco leaf substrate, the present invention coats the remaining concentrated liquid obtained above onto the reconstituted tobacco leaf substrate to produce paper-making reconstituted tobacco; wherein, the coating rate of the remaining concentrated liquid obtained above onto the reconstituted tobacco leaf substrate is 30% to 50%. The present invention may also mix the remaining concentrated liquid obtained above with additives and then coat it onto the reconstituted tobacco leaf substrate, wherein the additives include one or more of pigments or flavorings.

[0016] The present invention also provides reconstituted tobacco leaves prepared by the preparation method described in any of the above technical solutions. The reconstituted tobacco leaves prepared by the papermaking method obtained by the present invention have a high nicotine content, which can be increased by more than 80% compared with existing reconstituted tobacco leaves of the same type; specifically, the nicotine content of the reconstituted tobacco leaves prepared by the papermaking method obtained by the present invention can reach more than 1.6%, or even more than 2%.

[0017] This invention provides a papermaking method for reconstituted tobacco and its preparation. The method utilizes the high nicotine content of the concentrated liquor, evaporating a portion of the concentrated liquor into a solid before adding it to the production of reconstituted tobacco substrate, significantly increasing the nicotine content of the final papermaking reconstituted tobacco. The preparation process of this method is primarily physical, increasing the nicotine content of the reconstituted tobacco without negative impacts; the re-injection of the concentrated liquor also reduces production costs. The papermaking reconstituted tobacco obtained by this method has a high nicotine content. In the experiments conducted by this invention, the nicotine content of the papermaking reconstituted tobacco obtained by the method reached a minimum of 1.67% and a maximum of 1.96%. Detailed Implementation

[0018] This invention discloses a papermaking method for reconstituted tobacco leaves and its preparation method. Those skilled in the art can refer to the content of this document and appropriately modify the process parameters to achieve the desired result. It should be particularly noted that all similar substitutions and modifications are obvious to those skilled in the art and are considered to be included in this invention. The methods and applications of this invention have been described through preferred embodiments, and those skilled in the art can clearly modify or appropriately change and combine the methods and applications described herein without departing from the content, spirit, and scope of this invention to realize and apply the technology of this invention.

[0019] The present invention will be further described below with reference to the embodiments:

[0020] Comparative Example 1

[0021] Tobacco dust, factory feed, fragments, tobacco leaves, and tobacco stems are mixed evenly and extracted with 70°C hot water at a water ratio of 1:5. The extracted hot water is filtered and concentrated. The extracted tobacco raw material is pulped, and 800-mesh calcium carbonate filler is added to the pulp at a ratio of 1% for sizing. After dehydration and drying, a substrate is prepared. Pigments, flavorings, and other substances are added to the prepared concentrate and coated onto the surface of the substrate, followed by drying. The coating rate is 40%, resulting in reconstituted tobacco leaves produced by the papermaking method. The nicotine content of the obtained reconstituted tobacco leaves is 1.08%.

[0022] Example 1

[0023] Tobacco dust and stems were mixed evenly and extracted with 50°C hot water at a ratio of 1:3. The extracted hot water was filtered and concentrated, and 20% of the concentrate was evaporated to obtain a solid concentrated base material. The remaining 80% of the concentrate was reserved. The solid concentrated base material was mixed with calcium carbonate powder at a ratio of 1:3 and ground into a mixed filler with a particle size of 600 mesh. The extracted tobacco raw material was pulped, and the mixed filler was added to the pulp at a ratio of 0.5% for sizing. After dehydration and drying, a substrate was prepared. Pigments, flavorings, and other substances were added to the reserved concentrate and coated onto the surface of the substrate, followed by drying. The coating rate was 30%, resulting in reconstituted tobacco leaves produced by the papermaking method. The nicotine content of the reconstituted tobacco leaves was 1.67%, which was 54.63% higher than that of the control sample.

[0024] Example 2

[0025] Tobacco dust, factory feed, and tobacco stems were mixed evenly and extracted with 70℃ hot water at a water ratio of 1:5. The extracted hot water was filtered and concentrated, and 50% of the concentrate was evaporated to obtain a solid concentrated base material. The remaining 50% of the concentrate was reserved. The solid concentrated base material was mixed with calcium carbonate, kaolin, and aluminum silicate powder in a ratio of 1:2:2:2 and ground into a mixed filler with a particle size of 1200 mesh. The extracted tobacco raw materials were pulped, and the mixed filler was added to the pulp at a ratio of 1.5% for sizing. After dehydration and drying, a substrate was prepared. Pigments, flavorings, and other substances were added to the reserved concentrate and coated onto the surface of the substrate, followed by drying. The coating rate was 40%, resulting in reconstituted tobacco leaves produced by the papermaking method. The nicotine content of the obtained reconstituted tobacco leaves was 1.78%, which was 64.81% higher than that of the control sample.

[0026] Example 3

[0027] Tobacco dust, factory feed, fragments, tobacco leaves, and tobacco stems were mixed evenly and extracted with 90℃ hot water at a water ratio of 1:7. The extracted hot water was filtered and concentrated, and 50% of the concentrate was evaporated to obtain a solid concentrated base material. The remaining 50% of the concentrate was reserved. The solid concentrated base material was mixed with calcium carbonate and aluminum silicate powder in a ratio of 1:3:4 and ground into a mixed filler with a particle size of 1600 mesh. The extracted tobacco raw materials were pulped, and the mixed filler was added to the pulp at a ratio of 2% for sizing. After dehydration and drying, a substrate was prepared. Pigments, flavorings, and other substances were added to the reserved concentrate and coated onto the surface of the substrate, followed by drying. The coating rate was 50%, resulting in reconstituted tobacco leaves produced by the papermaking method. The nicotine content of the obtained reconstituted tobacco leaves was 1.96%, which was 81.48% higher than that of the control sample.

[0028] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A method of making paper-process reconstituted tobacco leaf, characterized by, The method comprises the following steps: S1) extracting tobacco raw material with water, filtering and concentrating to obtain concentrated liquid and extracted tobacco raw material; the mass ratio of the tobacco raw material to the water is 1:(3-7); the temperature of the water is 50-90℃; S2) evaporating part of the concentrated liquid in step S1) to obtain solid concentrated base material; preparing mixed filler by mixing inorganic filler and the solid concentrated base material; the mass ratio of the part of the concentrated liquid in step S1) to the total concentrated liquid in step S1) is 20-50%; S3) preparing reconstituted tobacco sheet base by mixing the extracted tobacco raw material in step S1) and the mixed filler in step S2); S4) coating the remaining concentrated liquid in step S1) on the reconstituted tobacco sheet base in step S3) to prepare paper-process reconstituted tobacco.

2. The production method according to claim 1, characterized by, In step S2), the mass ratio of the inorganic filler to the solid concentrated base material is 1:(3-7).

3. The preparation method according to claim 1, characterized in that, In step S2), the particle size of the mixed filler is 600-1600 mesh.

4. The method of claim 1, wherein, In step S2), the inorganic filler is selected from one or more of calcium carbonate, kaolin and aluminum silicate.

5. The preparation method according to claim 1, characterized in that, In step S3), the mass ratio of the mixed filler to the extracted tobacco raw material is 0.5-2%.

6. The method of claim 1, wherein, In step S4), the coating rate of the concentrated liquid on the reconstituted tobacco sheet base is 30-50%.

7. The preparation method according to claim 1, characterized in that, In step S1), the tobacco raw material comprises one or more of tobacco dust, tobacco stem, tobacco scrap and tobacco sheet.

8. Paper-process reconstituted tobacco obtained by the preparation method in any one of claims 1-7.