Papermaking-method reconstituted tobacco and preparation method thereofTechnical Field
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.
Background
The reconstituted tobacco prepared by the paper-making method is a reconstituted tobacco product prepared from tobacco raw materials such as tobacco stems, tobacco scraps, fragments and the like through the processes of extraction, refining, concentration, pulping, papermaking, coating and the like, is a cigarette filler used for the tobacco formula design, and can effectively improve the cigarette quality in the cigarette production process.
As an adjustable cigarette design tool, reconstituted tobacco is often designed with various properties to meet cigarette formulation requirements. Chinese patent CN113712239A discloses a preparation method of reconstituted tobacco by a high nicotine papermaking method by taking burley tobacco particles as a filler so as to improve the nicotine content of the reconstituted tobacco, but the addition of burley tobacco can lead to the limitation of the use interval of the reconstituted tobacco. Chinese patent CN109090683a discloses a method for enhancing nicotine content in reconstituted tobacco by re-adding concentrated liquid extract into coating liquid, but the use of such extract can cause viscosity increase of coating liquid, and is not easy to be soaked into substrate.
Disclosure of Invention
In view of the above, the technical problem to be solved by the invention is to provide the papermaking-process reconstituted tobacco and the preparation method thereof.
The invention provides a preparation method of paper-making reconstituted tobacco, which comprises the following steps:
s1) leaching the tobacco raw material with a leaching solvent, filtering and concentrating to obtain a concentrated solution and a leached tobacco raw material;
S2) evaporating part of the concentrated solution in the step S1) to obtain a solid concentrated bottom material;
Preparing inorganic filler and the solid concentrated bottom material into mixed filler;
s3) preparing reconstituted tobacco substrates from the leached tobacco raw materials in the step S1) and the mixed filler in the step S2);
S4) coating the concentrated solution in the rest step S1) on the reconstituted tobacco substrate in the step S3) to prepare the papermaking-process reconstituted tobacco.
The invention firstly uses leaching solvent to leach the tobacco raw material, filters and concentrates the tobacco raw material to obtain concentrated solution and leached tobacco raw material. Specifically, a tobacco raw material is extracted with an extraction solvent, and then filtered to obtain an extract and an extracted tobacco raw material, and the obtained extract is concentrated to obtain a concentrated solution. The tobacco raw materials comprise one or more of tobacco powder, tobacco stems, plant materials, fragments and tobacco flakes. The mass ratio of the tobacco raw material to the leaching solvent is 1 (3-7). In some embodiments of the 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 ℃.
The method comprises the steps of obtaining concentrated solution and leached tobacco raw materials, then, reserving the leached tobacco raw materials, evaporating part of the obtained concentrated solution to obtain solid concentrated bottom materials, reserving the rest of the obtained concentrated solution, wherein the mass ratio of the part of the obtained concentrated solution to the whole obtained concentrated solution is 20-50%. Evaporating excessive concentrated solution into solid concentrated bottom material can cause insufficient concentrated solution for subsequent coating, and influence production.
After the solid concentrated bottom material is obtained, the inorganic filler and the solid concentrated bottom material are prepared into mixed filler. Specifically, inorganic filler and the solid concentrated bottom material are mixed and ground to prepare mixed filler, wherein the ratio of the inorganic filler to the solid concentrated bottom material is 1 (3-7). The particle size of the mixed filler prepared by the invention is 600-1600 meshes. The inorganic filler is one or more selected from calcium carbonate, kaolin and aluminum silicate. The solid concentrated bottom material has a certain viscosity, and if inorganic filler is not added, the solid concentrated bottom material is not beneficial to grinding.
After the mixed filler is obtained, the tobacco raw material after leaching and the mixed filler are made into reconstituted tobacco substrates. The method comprises the steps of pulping the leached tobacco raw materials to obtain slurry, mixing the mixed filler and the slurry to carry out sizing operation, and dehydrating and drying to obtain reconstituted tobacco substrates. The mixed filler accounts for 0.5-2% of the mass of the extracted tobacco raw material.
The method comprises the steps of obtaining reconstituted tobacco substrates, and coating the residual concentrated solution on the reconstituted tobacco substrates to prepare the papermaking reconstituted tobacco, wherein the coating rate of the residual concentrated solution on the reconstituted tobacco substrates is 30% -50%. The invention can also mix the obtained concentrated solution and the additive, and then spread the mixture on the reconstituted tobacco substrate, wherein the additive comprises one or more of pigment or essence.
The invention also provides the paper-making reconstituted tobacco obtained by the preparation method according to any one of the technical schemes. The paper-making reconstituted tobacco obtained by the method has high nicotine content, and can be improved by more than 80 percent compared with the existing reconstituted tobacco of the same type, and particularly, the nicotine content of the paper-making reconstituted tobacco obtained by the method can reach more than 1.6 percent, even more than 2 percent.
The invention provides a paper-making reconstituted tobacco and a preparation method thereof. According to the preparation method of the reconstituted tobacco by the papermaking method, provided by the invention, by utilizing the characteristic of high nicotine content of the concentrated solution, part of the concentrated solution is evaporated into solid and then put into the production of reconstituted tobacco substrates, so that the nicotine content of the finally obtained reconstituted tobacco by the papermaking method can be remarkably improved. The preparation process of the preparation method of the reconstituted tobacco by the papermaking method is mainly based on physical means, the nicotine content of the reconstituted tobacco is improved, negative effects are not brought, and the production cost is reduced due to the fact that the concentrated solution is put into production again. The paper-making 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 reconstituted tobacco obtained by the preparation method is as low as 1.67% and as high as 1.96%.
Detailed Description
The invention discloses a paper-making reconstituted tobacco and a preparation method thereof. Those skilled in the art can, with the benefit of this disclosure, suitably modify the process parameters to achieve this. It is expressly noted that all such similar substitutions and modifications will be apparent to those skilled in the art, and are deemed to be included in the present invention. While the methods and applications of this invention have been described in terms of preferred embodiments, it will be apparent to those skilled in the relevant art that the invention can be practiced and practiced with modification and alteration and combination of the methods and applications herein without departing from the spirit and scope of the invention.
The invention is further illustrated by the following examples:
Comparative example 1
Uniformly mixing tobacco powder, factory materials, fragments, tobacco flakes and tobacco stems, leaching with 70 ℃ hot water at a water ratio of 1:5, filtering and concentrating the leached hot water, pulping the leached tobacco raw materials, adding 800-mesh calcium carbonate filler into the slurry according to an adding ratio of 1% for sizing operation, dehydrating and drying to prepare a substrate, adding substances such as pigment, essence and the like into the concentrated solution in standby, coating the concentrated solution on the surface of the substrate, and drying to obtain the reconstituted tobacco with a coating rate of 40%. The nicotine content of the prepared reconstituted tobacco is 1.08%.
Example 1
Uniformly mixing tobacco powder and tobacco stems, leaching the tobacco powder and the tobacco stems by using 50 ℃ hot water, filtering and concentrating the leached hot water according to a water ratio of 1:3, evaporating 20% concentrated solution into solid concentrated base material, mixing and grinding the solid concentrated base material and calcium carbonate powder according to a ratio of 1:3 into mixed filler with a particle size of 600 meshes, pulping the leached tobacco raw materials, adding the mixed filler into slurry according to an adding ratio of 0.5% for sizing operation, dehydrating and drying to prepare a substrate, adding substances such as pigment and essence into the concentrated solution in standby, coating the surface of the substrate, and drying to obtain the reconstituted tobacco with a coating rate of 30% by a papermaking method. The nicotine content of the prepared reconstituted tobacco is 1.67%, and is improved by 54.63% compared with a control sample.
Example 2
Uniformly mixing tobacco powder, factory material and tobacco stems, leaching with 70 ℃ hot water, the water ratio is 1:5, filtering and concentrating the leached hot water, evaporating 50% of concentrated solution into solid concentrated bottom material, mixing and grinding the solid concentrated bottom material with calcium carbonate, kaolin and aluminum silicate powder according to the ratio of 1:2:2:2 into mixed filler with the particle size of 1200 meshes, pulping the leached tobacco raw material, adding the mixed filler into the slurry according to the adding ratio of 1.5% for sizing operation, dehydrating and drying to prepare a substrate, adding substances such as pigment and essence into the concentrated solution in standby, coating the substrate surface, drying, and the coating rate is 40%, thus preparing the reconstituted tobacco by a paper-making method. The nicotine content of the prepared reconstituted tobacco is 1.78%, and is improved by 64.81% compared with a control sample.
Example 3
Uniformly mixing tobacco powder, factory materials, fragments, tobacco flakes and tobacco stems, leaching the tobacco powder, the factory materials, the fragments, the tobacco flakes and the tobacco stems by using hot water at the temperature of 90 ℃ in the water ratio of 1:7, filtering and concentrating the leached hot water, evaporating 50% of concentrated solution into solid concentrated bottom materials, mixing and grinding the solid concentrated bottom materials with calcium carbonate and aluminum silicate powder according to the proportion of 1:3:4 into mixed filler with the particle size of 1600 meshes, pulping the leached tobacco raw materials, adding the mixed filler into the slurry according to the adding proportion of 2% for sizing operation, dehydrating and drying to prepare a substrate, adding substances such as pigment and essence into the concentrated solution in standby, coating the substrate surface, and drying to obtain the reconstituted tobacco with the coating rate of 50% by a papermaking method. The nicotine content of the prepared reconstituted tobacco is 1.96%, and is improved by 81.48% compared with a control sample.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.