Paper-making reconstituted tobacco and preparation method thereof

Abstract

The invention relates to the technical field of paper-making reconstituted tobacco production, in particular to paper-making reconstituted tobacco and a preparation method thereof. According to the preparation method of the paper-making reconstituted tobacco, the characteristic of high nicotine content of the concentrated solution is utilized, part of the concentrated solution is evaporated into solids and then put into production of the reconstituted tobacco substrate, the remaining concentrated solution is coated on the obtained reconstituted tobacco substrate, and the nicotine content of the finally obtained paper-making reconstituted tobacco can be remarkably improved. The preparation process of the preparation method of the paper-making reconstituted tobacco provided by the invention is mainly based on physical means, so that the nicotine content of the reconstituted tobacco is increased, and meanwhile, no negative influence is caused; and the concentrated solution is put into production again, so that the production cost is reduced. The paper-making process reconstituted tobacco obtained by the preparation method provided by the invention has high nicotine content, and in the test of the invention, the nicotine content of the paper-making process reconstituted tobacco obtained by the preparation method provided by the invention is up to 1.67% to the minimum and up to 1.96% to the maximum.

Description

Technical Field

[0001] The invention relates to the technical field of papermaking process reconstituted tobacco production, in particular to papermaking process reconstituted tobacco and a preparation method thereof. Background Art

[0002] Papermaking reconstituted tobacco is a regenerated 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 formula design and can effectively improve the quality of cigarettes when used in the cigarette production process.

[0003] As an adjustable cigarette design tool, reconstituted tobacco is often designed with various properties to meet the needs of cigarette formulations. Chinese patent CN113712239A discloses a method for preparing high-nicotine papermaking reconstituted tobacco using burley tobacco particles as fillers to increase the nicotine content of the reconstituted tobacco, but the addition of burley tobacco will limit the use range of the reconstituted tobacco. Chinese patent CN109090683A discloses a method for increasing the nicotine content of the reconstituted tobacco by re-adding a concentrate extract into a coating liquid, but the use of this extract will increase the viscosity of the coating liquid and make it difficult to penetrate into 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 a preparation method thereof. The preparation method provided by the present invention can prepare papermaking reconstituted tobacco leaf with a high nicotine content.

[0005] The present invention provides a method for preparing reconstituted tobacco leaves by a papermaking process, comprising the following steps:

[0006] S1) extracting the tobacco raw material with an extraction solvent, filtering and concentrating, and obtaining a concentrated solution and the extracted tobacco raw material;

[0007] S2) evaporating part of the concentrated liquid in step S1) to obtain a solid concentrated base material;

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

[0009] S3) preparing a reconstituted tobacco leaf substrate by using the extracted tobacco raw material of step S1) and the mixed filler of step S2);

[0010] S4) coating the concentrate in the remaining step S1) on the reconstituted tobacco leaf substrate in step S3) to produce papermaking reconstituted tobacco leaves.

[0011] The present invention first extracts the tobacco raw material with an extraction solvent, filters and concentrates, and obtains a concentrated solution and the extracted tobacco raw material. Specifically, the tobacco raw material is extracted with an extraction solvent, and then filtered to obtain an extract and the extracted tobacco raw material; the obtained extract is concentrated to obtain a concentrated solution. The tobacco raw material of the present invention includes one or more of tobacco dust, tobacco stems, factory materials, fragments and tobacco flakes. The mass ratio of the tobacco raw material of the present invention to the extraction solvent is 1: (3~7). In certain embodiments of the present invention, the tobacco raw material is extracted with water, the mass ratio of the tobacco raw material 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; part of the obtained concentrated liquid is evaporated to obtain a solid concentrated base material, and the remaining concentrated liquid is set aside; the mass ratio of the part of the obtained concentrated liquid to the total obtained concentrated liquid is 20-50%. Evaporating too much concentrated liquid into the solid concentrated base material will cause insufficient concentrated liquid for subsequent coating, affecting production.

[0013] After obtaining the solid concentrated base material, the present invention prepares a mixed filler with an inorganic filler and the solid concentrated base material. Specifically, the inorganic filler and the solid concentrated base material are mixed and ground to prepare a 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 the present invention is 600 mesh~1600 mesh. The inorganic filler of the present invention is selected from one or more of calcium carbonate, kaolin and aluminum silicate. The solid concentrated base material has a certain viscosity. If the inorganic filler is not added, it will be unfavorable for grinding the solid concentrated base material.

[0014] After obtaining the mixed filler, the present invention uses the aforementioned extracted tobacco raw material and the mixed filler to make a reconstituted tobacco leaf substrate. Specifically, the aforementioned extracted tobacco raw material is pulped to obtain a slurry; the mixed filler and the slurry are mixed and sizing is performed, and then dehydrated and dried to obtain a reconstituted tobacco leaf substrate. The mass ratio of the mixed filler in the present invention to the extracted tobacco raw material is 0.5-2%.

[0015] After obtaining the reconstituted tobacco leaf substrate, the present invention applies the remaining concentrated liquid on the reconstituted tobacco leaf substrate to produce papermaking reconstituted tobacco; wherein the coating rate of the remaining concentrated liquid on the reconstituted tobacco leaf substrate is 30% to 50%. The present invention can also mix the remaining concentrated liquid with an additive and then apply it on the reconstituted tobacco leaf substrate, wherein the additive includes one or more of a pigment or an essence.

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

[0017] The present invention provides a papermaking reconstituted tobacco leaf and a preparation method thereof. The preparation method of the papermaking reconstituted tobacco leaf provided by the present invention utilizes the characteristic of high nicotine content of the concentrated liquid, evaporates part of the concentrated liquid into solid and then puts it into the production of the reconstituted tobacco leaf substrate, which can significantly increase the nicotine content of the papermaking reconstituted tobacco leaf finally obtained. The preparation process of the papermaking reconstituted tobacco leaf preparation method provided by the present invention is mainly based on physical means, which will not bring negative effects while increasing the nicotine content of the reconstituted tobacco leaf; the operation of re-putting the concentrated liquid into production also reduces the production cost. The papermaking reconstituted tobacco leaf obtained by the preparation method provided by the present invention has a high nicotine content. In the experiment of the present invention, the nicotine content of the papermaking reconstituted tobacco leaf obtained by the preparation method of the present invention is as low as 1.67% and as high as 1.96%. DETAILED DESCRIPTION

[0018] The present invention discloses a papermaking method for reconstituted tobacco and a preparation method thereof. Those skilled in the art can refer to the content of this article and appropriately improve the process parameters to achieve the same. 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 the present invention. The method and application of the present invention have been described through preferred embodiments, and relevant personnel can obviously modify or appropriately change and combine the method and application of this article without departing from the content, spirit and scope of the present invention to implement and apply the technology of the present invention.

[0019] The present invention will be further described below in conjunction with embodiments:

[0020] Comparative Example 1

[0021] The tobacco dust, factory materials, fragments, tobacco flakes and tobacco stems were mixed evenly, extracted with 70℃ hot water, water ratio 1:5, the hot water after extraction was filtered and concentrated, the extracted tobacco raw materials were pulped, 800 mesh calcium carbonate filler was added to the pulp at a ratio of 1% for sizing, and then dehydrated and dried to prepare the substrate, the reserved concentrated solution was added with pigments, flavors and other substances and then coated on the surface of the substrate, and then dried, the coating rate was 40%, and the papermaking method reconstituted tobacco leaves were obtained. The nicotine content of the prepared reconstituted tobacco leaves was 1.08%.

[0022] Example 1

[0023] The tobacco dust and tobacco stems were mixed evenly, extracted with 50℃ hot water, with a water ratio of 1:3, the extracted hot water was filtered and concentrated, 20% of the concentrated liquid was evaporated into a solid concentrated base material, and the remaining 80% of the concentrated liquid was reserved, the solid concentrated base material and calcium carbonate powder were mixed and ground into a mixed filler with a particle size of 600 mesh in a ratio of 1:3, the extracted tobacco raw materials were pulped, and the mixed filler was added to the pulp at a ratio of 0.5% for sizing, and then dehydrated and dried to prepare a substrate, and the reserved concentrated liquid was added with pigments, flavors and other substances and then coated on the surface of the substrate, and then dried, with a coating rate of 30%, to obtain papermaking method reconstituted tobacco leaves. The nicotine content of the prepared reconstituted tobacco leaves was 1.67%, which was 54.63% higher than that of the control sample.

[0024] Example 2

[0025] The tobacco dust, factory material and tobacco stems were mixed evenly, extracted with 70℃ hot water, water ratio 1:5, the extracted hot water was filtered and concentrated, 50% of the concentrated liquid was evaporated into a solid concentrated base material, and the remaining 50% of the concentrated liquid 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 material was pulped, and the mixed filler was added to the pulp at a ratio of 1.5% for sizing, and then dehydrated and dried to prepare a substrate, and the reserved concentrated liquid was added with pigments, flavors and other substances and then coated on the surface of the substrate, and then dried, with a coating rate of 40%, to obtain papermaking method reconstituted tobacco leaves. The nicotine content of the prepared reconstituted tobacco leaves was 1.78%, which was 64.81% higher than that of the control sample.

[0026] Example 3

[0027] The tobacco dust, factory materials, fragments, tobacco flakes and tobacco stems were mixed evenly, extracted with 90℃ hot water, water ratio 1:7, the extracted hot water was filtered and concentrated, 50% of the concentrated liquid was evaporated into a solid concentrated base material, and the remaining 50% of the concentrated liquid 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, the mixed filler was added to the pulp at a ratio of 2% for sizing, and then dehydrated and dried to prepare a substrate, the reserved concentrated liquid was added with pigments, flavors and other substances and then coated on the surface of the substrate, and then dried, the coating rate was 50%, and the papermaking method reconstructed tobacco leaves were obtained. The nicotine content of the reconstructed tobacco leaves obtained was 1.96%, which was 81.48% higher than that of the control sample.

[0028] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A method for preparing reconstituted tobacco leaves by a papermaking process, characterized in that: The following steps are involved: S1) extracting the tobacco raw material with an extraction solvent, filtering and concentrating, and obtaining a concentrated solution and the extracted tobacco raw material; S2) evaporating part of the concentrated liquid in step S1) to obtain a solid concentrated base material; preparing a mixed filler with an inorganic filler and the solid concentrated base material; S3) preparing a reconstituted tobacco leaf substrate by using the extracted tobacco raw material of step S1) and the mixed filler of step S2); S4) coating the concentrate in the remaining step S1) on the reconstituted tobacco leaf substrate in step S3) to produce papermaking reconstituted tobacco leaves.

2. The preparation method according to claim 1, characterized in that: In step S2), the mass ratio of the concentrated solution in part of step S1) to the concentrated solution in all of step S1) is 20-50%.

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

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

5. The preparation method according to claim 1, characterized in that: In step S2), the inorganic filler is selected from one or more of calcium carbonate, kaolin and aluminum silicate.

6. 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%.

7. The preparation method according to claim 1, characterized in that: In step S4), the concentrated liquid is coated on the reconstituted tobacco leaf substrate at a coating rate of 30% to 50%.

8. The preparation method according to claim 1, characterized in that: In step S1), the mass ratio of the tobacco raw material to the extraction solvent is 1:(3-7).

9. The preparation method according to claim 1, characterized in that: In step S1), the tobacco raw material includes one or more of tobacco dust, tobacco stems, factory materials, fragments and tobacco flakes.

10. The papermaking reconstituted tobacco obtained by the preparation method according to any one of claims 1 to 9.