WO2021197458A1

WO2021197458A1 - Method for preparing reconstituted tobacco by using slurry process, and product

Info

Publication number: WO2021197458A1
Application number: PCT/CN2021/085195
Authority: WO
Inventors: 林伟胜; 靖德军; 容辉; 周国印; 彭坤鹏; 林颖; 张亚玮; 刘刚; 傅源锋
Original assignee: 广东省金叶科技开发有限公司
Priority date: 2020-04-02
Filing date: 2021-04-02
Publication date: 2021-10-07
Also published as: CN111436636B; CN111436636A

Abstract

Disclosed are a method for preparing reconstituted tobacco by using a slurry process, and a product. The method comprises: coating a substrate with reconstituted tobacco slurry by using a slurry process, drying the coated slurry to control the moisture content in the coated slurry, so as to obtain tobacco sheets, then laminating the tobacco sheets again on a foundation of the tobacco sheets, and repeating the above-mentioned steps at least once, so as to obtain reconstituted tobacco with multiple layers of laminated tobacco sheets.

Description

Method and product for preparing reconstituted tobacco using thick slurry method

Cross-references to related applications

This application claims the priority of a Chinese patent application filed with the Chinese Patent Office on April 02, 2020, with the application number 2020102571277, titled "A method and product for preparing reconstituted tobacco using a thick slurry method", the entire content of which is incorporated by reference Incorporated in this application.

Technical field

The present disclosure relates to the technical field of reconstituted tobacco, in particular, to a method and product for preparing reconstituted tobacco using a thick slurry method.

Background technique

Reconstituted tobacco (reconstituted tobacco), also known as tobacco reconstituted tobacco flakes, originated in the 1950s and has gradually developed to this day. This technology is to process the waste tobacco stems, dust and low-quality tobacco leaves produced during the production of cigarettes through a series of processing , The quality of the remanufactured tobacco leaves is close to or even better than that of natural tobacco leaves. Reconstituted tobacco has the characteristics of good combustion performance, high filling degree, and low tar content.

Reconstituted tobacco is the main tobacco material used in heat-not-burn cigarettes, and it is also the core raw material of heat-not-burn cigarettes. The production process of reconstituted tobacco leaves mainly includes roll pressing method, thick pulp method, papermaking method, dry method and so on. Rolling method of reconstituted tobacco is to pulverize tobacco stalks, tobacco powder, stalk sticks and other tobacco materials and mix them with adhesives, enhancers, moisturizers, water and other materials in a certain proportion to form loose pellets. Rolled by a roller press to form a sheet for drying, and finally cut into reconstituted tobacco shreds by a shredder. Thick slurry method reconstituted tobacco is to pulverize the tobacco materials and mix them into an aqueous solution with adhesives, enhancers, humectants and water, stir them evenly to form a slurry, and spread them evenly on a stainless steel belt After drying and shoveling, reconstituted tobacco leaves are formed. Paper-making reconstituted tobacco originated in Austria, the United States, France, Germany and other countries. The main purpose is to recycle tobacco waste generated during tobacco processing, increase the utilization rate of tobacco raw materials, and make cigar wrappers, which belong to tobacco resources. A product that is reused. According to its development history, it is mainly divided into two-step papermaking method and one-step papermaking method. At present, the mainstream processing technology widely used at home and abroad is the two-step papermaking method. The two-step production process is as follows: according to the requirements of the reconstituted tobacco raw material formula, the tobacco stems, fragments, and tobacco dust are soaked and extracted in hot water and separated by solid-liquid separation. The slag is made into a sheet base by pulping and papermaking on a special paper machine, and then the coating liquid is uniformly coated on the surface of the sheet base, and then dried to form a reconstituted tobacco leaf.

At present, most domestic tobacco factories use the rolling method for the manufacture of reconstituted tobacco leaves, and the thick slurry method is less used. Among them, most of the heat-not-burn smokes are made by papermaking method, dry method, etc., while the traditional thick pulp method flakes as a heat-not-burn tobacco shredded has the following defects: Compared with the papermaking method and dry method flakes, the traditional thick pulp method The thin slices have problems such as large thickness, poor toughness, and compact structure. Large thicknesses will produce problems such as low filling of tobacco, slow heat conduction, and insufficient smoke. Poor toughness will cause the thin slices to be fragile and fragile during processing such as shredding and rod forming. Broken and other problems, the compact structure makes it difficult for the added flavors and fragrances to be absorbed and stays on the surface, resulting in stickiness between the tobacco after the rod is formed, which affects heat conduction and air circulation, thereby affecting the suction effect.

In view of this, this disclosure is hereby provided.

Summary of the invention

The purpose of the present disclosure includes, for example, overcoming the above-mentioned defects in the prior art and providing a method for preparing reconstituted tobacco using a thick slurry method.

This disclosure is implemented as follows:

In a first aspect, the embodiments of the present disclosure provide a method for preparing reconstituted tobacco using a thick slurry method, including: coating the reconstituted tobacco slurry on a substrate, drying to prepare a first layer of tobacco flakes, and superimposing the first layer of tobacco flakes The second layer of tobacco flakes, and the uppermost layer of tobacco flakes as the substrate, repeat the above steps at least once to prepare a reconstituted tobacco leaf superimposed on the tobacco flakes.

At present, the production process of thick pulp reconstituted tobacco leaves is divided into three parts: one is the preparation of soot, the raw materials are mechanically pulverized to obtain soot ≤250um; the second is the preparation of adhesives; the third is forming and drying. Part of the material is fully mixed to form a thick slurry, which is then shaped and dried on the equipment, and the thick slurry method is used to reconstitute tobacco leaves. In the production, there must be a certain degree of adhesion between the various substances in the thick slurry to be paved into a complete block, otherwise they will be disconnected from each other and form a large number of holes, which will seriously affect the water resistance and tensile strength of the reconstituted tobacco leaf, thereby affecting its use. In the use process of thick pulp method reconstituted tobacco leaves, due to the addition of liquid sugar and flavor, it may break and break. Therefore, there are higher requirements for the water resistance and tensile strength of the reconstituted tobacco leaves. In the process of remanufacturing tobacco leaves, an adhesive with better adhesive effect is needed. However, for the thick slurry method of reconstituted tobacco, because the powdered tobacco powder is used, chitosan alone cannot achieve a good adhesion of the powdered tobacco powder.

In order to overcome the problems existing in the current thick slurry method for preparing reconstituted tobacco, embodiments of the present disclosure provide a method for preparing reconstituted tobacco using the thick slurry method. A layer of tobacco flakes, a second layer of tobacco flakes and a third layer of tobacco flakes are sequentially superimposed on the first layer of tobacco flakes, and the above steps are repeated to obtain reconstituted tobacco leaves with superimposed tobacco flakes. The above methods provided in the embodiments of the present disclosure can adjust the composition of the reconstituted tobacco slurry according to actual needs. For example, according to the actual needs, the composition and ratio of the tobacco powder, glue, fiber, and water in the reconstituted tobacco slurry can be adjusted. In a preferred embodiment, such as reducing or not using tobacco powder in the thick pulp of the first layer of tobacco sheet and the third layer of tobacco sheet, and increasing the amount of fiber and glue, the three-layer thick pulp method tobacco sheet is made It can improve the overall toughness of the tobacco sheet and reduce the fragility of the tobacco sheet. As a result, pastes with different taste experience can be formulated according to actual needs, so as to meet the needs of a variety of tobacco products. Secondly, in the preparation process of the reconstituted tobacco laminated with tobacco sheets, no adhesive is used, which not only reduces the steps of adhesive bonding, but also does not cause the problem that the adhesive affects the smoking taste during the burning process.

In one or more embodiments, the reconstituted tobacco leaf superimposed on tobacco sheets is a reconstituted tobacco leaf superimposed on multilayer tobacco sheets and/or sandwiched tobacco sheets;

Preferably, in the reconstituted tobacco laminated with multiple layers of tobacco sheets, the second layer of tobacco sheets is made by coating the reconstituted tobacco slurry;

Preferably, in the reconstituted tobacco laminated with sandwiched tobacco sheets, the second layer of tobacco sheets is made of tobacco sheet samples.

In one or more embodiments, the preparation of laminated reconstituted tobacco sheets of multilayered tobacco sheets includes the following steps: coating the reconstituted tobacco slurry on a substrate, drying to obtain the first layer of tobacco sheets, and then applying the reconstituted tobacco sheet to the first layer of tobacco. The sheet is again coated with the reconstituted tobacco leaf slurry, dried to obtain a second layer of tobacco sheet, and then the uppermost tobacco sheet is used as a substrate, and the above steps are repeated at least once to prepare a reconstituted tobacco leaf laminated with multilayer tobacco sheets.

In one or more embodiments, the drying temperature of each layer of tobacco sheet is 60-80°C.

In one or more embodiments, the moisture content of each layer of tobacco sheet after drying is controlled to be 10-20%.

In the preparation process of multi-layer thick pulp tobacco flakes, it is only necessary to configure the slurries made by different tobacco flakes according to actual needs, and then apply the configured reconstituted tobacco leaf slurry through multiple coatings to control each coating The moisture content in the later tobacco slices is used to obtain reconstituted tobacco in which different tobacco slices are superimposed. During the whole preparation process, the tobacco sheet after each coating is controlled to be dried at 60-80°C, so that the moisture content in the dried tobacco sheet is 10-20%, which can make the difference between different tobacco sheets better. Adhesive strength, no warping or curling problems, and too high moisture content may cause tobacco deformation, and too low moisture content, it is difficult for different tobacco sheets to fit tightly.

In one or more embodiments, the preparation of laminated reconstituted tobacco sheets of sandwiched tobacco sheets includes the following steps: coating the reconstituted tobacco slurry on a substrate, drying to obtain a first layer of tobacco sheets, and then superimposing the tobacco sheet samples on On the first layer of tobacco sheet, the reconstituted tobacco leaf slurry was coated on the tobacco sheet sample again, and dried to obtain the third layer of tobacco sheet, and then the uppermost tobacco sheet was used as the substrate, and the above steps were repeated at least once to prepare sandwich tobacco. Superimposed reconstituted tobacco leaves.

In one or more embodiments, the moisture content of each layer of tobacco sheet after drying is controlled to be 30-40%.

In one or more embodiments, the tobacco sheet sample includes any one or more of dry tobacco sheets, thick pulp tobacco sheets, paper-making tobacco sheets, and paper substrates.

In the preparation process of the sandwich thick pulp tobacco sheet, it is only necessary to configure the slurry made by different tobacco sheets according to the actual needs, and the tobacco sheet made by coating the configured reconstituted tobacco leaf slurry with the existing tobacco sheet Samples can be superimposed. This method can not only formulate the composition of the reconstituted tobacco slurry according to actual needs, but also use the existing tobacco sheet samples, which greatly enriches the composition of the product. In the entire process, each coating is controlled. After the tobacco sheet is dried at 60-80°C, the moisture content in the dried tobacco sheet is 30-40%. The tobacco sheet contains a higher moisture content and can be bonded with existing tobacco sheet samples. There is no problem of warping or curling. If the moisture content is too high, deformation may occur, and if the moisture content is too low, it is difficult for the newly coated tobacco sheet to adhere closely to the existing tobacco sheet sample.

In one or more embodiments, the reconstituted tobacco slurry used for coating each layer of tobacco sheet can be adjusted according to requirements.

In one or more embodiments, after stacking the tobacco sheets of each layer, they are dried at 60-80° C. to control the moisture content of the finally obtained reconstituted tobacco leaves below 4%.

In the second aspect, the embodiments of the present disclosure provide a reconstituted tobacco leaf prepared by the above method.

The embodiments of the present disclosure provide a reconstituted tobacco leaf prepared by the above method. The thick pulp method tobacco sheet can maintain the original smoking quality and chemical composition of the tobacco, and has the characteristics of loose structure, better combustibility and filling ability.

In a third aspect, the embodiments of the present disclosure provide a method for preparing reconstituted tobacco using a thick slurry method, which is characterized in that it includes the following steps:

Preparation of slurry: prepare the slurry required for coating of each layer according to a certain formula;

Multi-layer thick slurry method to make reconstituted tobacco leaves: spread the prepared first layer of thick slurry evenly on the substrate and dry to prepare the first layer of tobacco flakes, and then evenly coat the second layer of thick slurry on the first layer of thick slurry. A layer of tobacco flakes is applied and dried to obtain a second layer of tobacco flakes, and the uppermost layer of tobacco flakes is used as a substrate, and the above steps are repeated at least once to prepare a reconstituted tobacco leaf with superimposed tobacco flakes.

In one or more embodiments, the drying temperature of each layer of the tobacco sheet is 60-80°C.

In one or more embodiments, the moisture content of each layer of the tobacco sheet after drying is controlled to be 10-20%.

In one or more embodiments, in the process of preparing the slurry, the ratio of tobacco powder: glue: fiber: water: glycerin = 40:1:1:200:10 is used to prepare all required coatings for each layer.述泥。 Said slurry.

In one or more embodiments, in the process of preparing the slurry, the slurry required for coating the even-numbered layer is prepared according to the ratio of smoke powder: glue: fiber: water: glycerin = 60:1:1:200:10 And prepare the slurry required for coating the odd-numbered layers according to the ratio of tobacco powder: glue: fiber: water: glycerin = 20: 1.5: 2: 200: 10.

In a fourth aspect, the embodiments of the present disclosure provide a method for preparing reconstituted tobacco using a thick slurry method, which is characterized in that it includes the following steps:

Sandwich thick slurry method to make reconstituted tobacco leaves: spread the prepared first layer of thick slurry evenly on the substrate and dry to obtain the first layer of tobacco flakes; spread the finished tobacco flakes on the first layer of tobacco flakes, As the second layer of tobacco flakes; spread the prepared third layer of thick slurry evenly on the second layer of tobacco flakes and dry to obtain the third layer of tobacco flakes, and then use the uppermost layer of tobacco flakes as the substrate, repeat the above The step is at least one time to prepare a reconstituted tobacco leaf laminated with sandwiched tobacco sheets.

In one or more embodiments, the moisture content in each layer of the tobacco sheet after drying is controlled to be 30-40%.

In one or more embodiments, in the process of preparing the slurry, the ratio of smoke powder: glue: fiber: water: glycerin = 40:1:1:200:10 is used to prepare all the layers required for coating.述泥。 Said slurry.

The present disclosure has the following beneficial effects:

The present disclosure provides a method and product for preparing reconstituted tobacco using a thick slurry method. The reconstituted tobacco leaf slurry is coated on the substrate by the thick slurry method, and the coated slurry is dried to control the moisture content to obtain a tobacco sheet, and then the tobacco sheet is laminated again on the basis of the tobacco sheet to obtain a multilayered tobacco sheet. Reconstituted tobacco leaves. The method adopts an improved thick slurry method to prepare reconstituted tobacco leaves. Different tobacco flakes of the reconstituted tobacco leaves can be directly glued without the use of adhesives for gluing. It has the advantages of low water consumption, simple procedures, and short time-consuming.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be described clearly and completely below. If no specific conditions are indicated in the examples, it shall be carried out in accordance with the conventional conditions or the conditions recommended by the manufacturer. The reagents or instruments used without the manufacturer's indication are all conventional products that can be purchased on the market.

The features and performance of the present disclosure will be described in further detail below in conjunction with embodiments.

A method for preparing reconstituted tobacco using the thick slurry method, including the following methods A and B:

A. A method for preparing reconstituted tobacco using a thick slurry method, including the following steps:

Preparation of slurry: prepare the slurry required for each layer coating according to a certain formula. According to requirements, the components such as smoke powder, glue amount, fiber and other components in the formula can be changed.

Multi-layer thick slurry method to make reconstituted tobacco leaves: spread the prepared first layer of thick slurry evenly on a steel belt without joints with a feeder, adjust the distance of the scraper, and apply a quantitative slurry at 60-80℃ Dry, control the moisture content in it to 10-20%, and paint thin products of different thickness;

Then use the feeder to evenly coat the second layer of thick slurry on the first layer of tobacco sheet, adjust the distance of the doctor blade, apply a quantitative slurry, and dry it at 60-80℃, and control the moisture content in it to 10-20 %, paint thin products with different thicknesses;

By analogy, finally the manufactured multilayer thick-paste tobacco sheet product is dried at 60-80°C, and the moisture content in it is controlled below 4%, and then shoveled out with a spatula.

In the above preparation process, the formula of each layer of thick slurry and the distance of each layer of scraper can be adjusted according to the needs, so as to paint products of different quantitative and thickness.

B. A method for preparing reconstituted tobacco using a thick slurry method, including the following steps:

Sandwich thick slurry method to make reconstituted tobacco leaves: spread the prepared first thick slurry evenly on a steel belt without joints with a feeder, adjust the distance of the scraper, apply a quantitative slurry, and dry it at 60-80℃ , Control the moisture contained in it to 30-40%, and paint thin products with different thicknesses;

Lay the finished tobacco sheet on the first layer of tobacco sheet as the second layer of tobacco sheet;

Then use the feeder to evenly coat the third layer of thick slurry on the second layer of tobacco sheet, adjust the distance of the doctor blade, apply a quantitative slurry, and dry it at 60-80℃, and control the moisture content in it to 30-40 %, paint thin products with different thicknesses;

By analogy, the finished multilayer thick pulp tobacco sheet product is dried at 60-80°C, and the moisture content in it is controlled to below 4%, and it is shoveled out with a spatula.

Example 1

A method for preparing reconstituted tobacco using a thick slurry method includes the following steps:

Preparation of slurry: According to the ratio of tobacco powder: glue: fiber: water: glycerin=40:1:1:1:200:10, the slurry required for coating of each layer is prepared.

Multi-layer thick slurry method to make reconstituted tobacco leaves: spread the prepared first layer of thick slurry evenly on the steel belt without joints with a feeder. The distance between the scraper of the feeder and the steel belt is 0.2mm, and the coating quantity is 0.2 The slurry of kg/m ² was dried at 60°C, and the moisture contained in it was controlled to 10% to obtain the first layer of tobacco sheet ^{with a unit weight of 40 g/m 2;}

Then use a feeder to evenly coat the second layer of thick slurry on the first layer of tobacco sheets. The distance between the feeder's scraper and the first layer of sheet is 0.2mm, and ^{the slurry with a basis weight of 0.2kg/m 2} is applied. Drying at 60°C, controlling the moisture contained in it to 10%, to obtain a double-layered tobacco sheet ^{with a unit weight of 80g/m 2;}

By analogy, finally the manufactured multilayer thick-paste tobacco sheet product is dried at 60°C, and the moisture content in it is controlled to 3%, and it is shoveled out with a spatula. In this experiment, a sample with a thickness of 0.17 mm, a basis weight of 130 g/m ² and 3 layers was obtained.

Example 2

Sandwich thick slurry method to make reconstituted tobacco: spread the first layer of thick slurry evenly on a steel belt without joints with a feeder. The distance between the scraper of the feeder and the steel belt is 0.2mm, and the coating quantity is 0.2kg. /m ² of the slurry, dried at 60°C, and controlled the moisture contained in it to 30%, to obtain the first layer of tobacco flakes;

Feeder and then a third layer thick syrup evenly on the second layer sheet tobacco, and the second feeder layer sheet blade distance 0.2mm, the basis weight of the slurry coating 0.2kg / m ^2, and in Dry at 60°C, control the moisture contained in it to 30%, and prepare the third layer of tobacco flakes;

By analogy, repeat the above-mentioned operation steps, and finally, dry the manufactured multilayer thick pulp tobacco sheet product at 60°C, control the moisture content in it to 3%, and shovel it out with a spatula. In this experiment, a sample with a thickness of 0.6mm, a basis weight of 330g/m ² and a number of layers of 5 layers was obtained.

Example 3

Lay the paper fiber base sheet on the first layer of tobacco sheet as the second layer of tobacco sheet;

Feeder and then a third layer thick syrup evenly on the paper substrate layer and the second feeder blade sheet distance is 0.2mm, the basis weight of the slurry coating 0.2kg / m ^2, and at 60 deg.] C Drying, control the moisture contained in it to 30%, to obtain the third layer of tobacco flakes;

By analogy, finally the manufactured multilayer thick-paste tobacco sheet product is dried at 60°C, and the moisture content in it is controlled to 3%, and it is shoveled out with a spatula. In this experiment, the thickness is 0.13mm, the basis weight is 92g/m ² , and the number of layers is 3 layers.

Example 4

Preparation of slurry: According to the ratio of tobacco powder: glue: fiber: water: glycerin = 60: 1: 1: 200: 10, prepare the required slurry for the second, fourth, sixth... layer (ie even-numbered layer), press Tobacco powder: glue: fiber: water: glycerin = 20: 1.5: 2: 200: 10 ratio to prepare the slurry required for coating the first 1, 3, 5... layers (ie odd-numbered layers).

Multi-layer thick slurry method to make reconstituted tobacco leaves: spread the prepared first layer of thick slurry evenly on the steel belt without joints with a feeder. The distance between the scraper of the feeder and the steel belt is 0.2mm, and the coating quantity is 0.2 The slurry of kg/m ² was dried at 60°C, and the moisture contained in it was controlled to 10% to obtain the first layer of tobacco flakes;

Then use a feeder to evenly coat the second layer of thick slurry on the first layer of tobacco sheets. The distance between the feeder's scraper and the first layer of sheet is 0.2mm, and ^{the slurry with a basis weight of 0.2kg/m 2} is applied. Drying at 60°C and controlling the moisture contained in it to 10%, to obtain the second layer of tobacco flakes;

By analogy, finally the manufactured multilayer thick-paste tobacco sheet product is dried at 60°C, and the moisture content in it is controlled to 3%, and it is shoveled out with a spatula. In this experiment, the thickness is 0.18mm, the basis weight is 128g/m ² , and the number of layers is 3 layers.

In the following, the samples of Example 1 and Example 4, and Example 2 and Example 3 are compared, and the tensile strength and folding resistance of each sample are tested respectively. The results are: the tensile strength of the sample in Example 1 is 0.53±0.19kN/m ² , and the folding resistance is 9; the tensile strength of the sample in Example 2 is 1.91±0.53 kN/m ² , and the folding resistance is 7, in Example 3. The tensile strength of the sample is 2.42±0.33 kN/m ² , and the folding resistance is 19; the tensile strength of the sample of Example 4 is 0.79±0.11 kN/m ² , and the folding resistance is 11.

The results show that in the multi-layer coating process, the amount of smoke powder in the first and third layers of thick slurry in the sandwich coating process is reduced, and the amount of fiber and glue is increased, and the reduced amount of smoke powder is added to the second layer of thick slurry. In the slurry, the tensile strength and folding endurance of the three-layer thick slurry method sheet have been improved, thereby improving the overall toughness of the sheet and reducing the fragility of the sheet. In the interlayer coating process, the use of a paper fiber substrate instead of the interlayer tobacco sheet can significantly improve the tensile strength and folding resistance of the sheet, thereby improving the overall physical properties of the sheet.

Comparative example 1

Spread the prepared thick slurry evenly on the steel belt without joints with a feeder. The distance between the scraper of the feeder and the steel belt is 0.6mm, and ^{the slurry with a basis weight of 0.6kg/m 2} is coated and dried at 60°C. , Control the moisture contained in it to 3%, and prepare a single-layer thick slurry method sample ^{with a thickness of 0.16mm and a quantitative value of 124g/m 2.}

The tensile strength, tearing strength, folding resistance and suction evaluation of the three-layer thick slurry method sample of Example 1 and the single-layer thick slurry method product of Comparative Example 1 were tested respectively. The test result is: the tensile strength and tearing strength of the sample of Example 1 and the sample of Comparative Example 1 are close, the test result of Folding Resistance Example 1 is 9, and the test result of Comparative Example 1 is 5, and the suction results are the same.

The results show that the multi-layer thick slurry method sheet and the single-layer thick slurry method sheet made with the same slurry have a better flexural resistance than the single layer thick slurry method when the thickness is close to the basis weight. Thin slices.

Comparative example 2

A method for preparing three-layer reconstituted tobacco using adhesive stickiness, including the following steps:

Preparation of slurry: prepare the required glue solution according to the ratio of glue: water=3:100, and the type of glue used is the same as in Example 3. Prepare three tobacco sheets, the type is the same as in Example 2.

Take out a piece of tobacco sheet, evenly spread the glue on one side of the sheet, the glue is 0.08kg/m ² , paste a piece of tobacco sheet, dry at 60 ℃ for 1 hour, and then evenly spread the glue on the double On one side of the layered sheet, the glue quantitatively is 0.08kg/m ² , a piece of tobacco sheet is pasted and dried at 60°C for 1 hour. A three-layer reconstituted tobacco sample with a thickness of 0.62 mm and a basis weight of 131 g/m ^{2 was obtained.}

The five-layer thick slurry method sample of Example 2 and the three-layer reconstituted tobacco sample of Comparative Example 2 were tested respectively for tensile strength 500N, folding resistance and suction evaluation. The test result is: the tensile strength of the sample of Example 2 is 1.91±0.53kN/m ² , the tensile strength of the sample of Comparative Example 2 is 1.33±0.39N/m ² , the tear strength results are close, and the folding resistance of Example 2 The sample test result is 7, and the sample test result of Comparative Example 2 is 3. The smoke evaluation result: the sample of Example 2 has problems such as slight smoke attenuation and slightly larger suction resistance, and the sample of Comparative Example 2 has obvious smoke attenuation and peculiar smell.

The results show that: the multi-layer thick slurry method sheet made by the sandwich thick slurry method and the multilayer reconstituted tobacco sheet made by the adhesive, when the thickness and the quantitative value are close, the bending resistance of the multilayer thick slurry method sheet Tensile strength is better than multilayer reconstituted tobacco flakes. In addition, the multilayer reconstituted tobacco flakes made with adhesives have problems such as insufficient tightness between the layers of the adhesive and poor thermal conductivity. At the same time, the adhesive will produce peculiar smells during the heating process, resulting in smoke on the suction The volume attenuation is obvious, and there are problems such as peculiar smell.

Comparative example 3

The steps are similar to those in Example 1, except that the drying temperature is 80° C. and 100° C., and the moisture content of each layer of the sheet is controlled to 20% and 40%. Sample 1-1 with a drying temperature of 80°C and a moisture control of 10% for each layer of flakes, a sample 1-2 with a drying temperature of 100°C and a moisture control of 10% for each layer of flakes, and a drying temperature of 60°C. Sample 2-1 in which the moisture content of each layer is controlled at 20%, the drying temperature is 60°C, and the sample 2-2 in which the moisture content of each layer is controlled at 40%.

Comparing the samples of Example 1 to observe the appearance of each sample, the surface of the sample sheet of Example 1 is relatively flat and the thickness is uniform; the surface of the sample 1-1 is relatively flat, the thickness is uniform, and the color is uniform. There are small cracks on the surface of the sample 1-2. Unevenness, uneven thickness, and uneven color; sample 2-1 has a flat sheet surface, uniform thickness, and uniform color; sample 2-2 has a flat sheet surface, uneven thickness, and uneven color.

Test the tensile strength and folding resistance of each sample respectively. The results are: the tensile strength of the sample of Example 1 is 0.53±0.19kN/m ² and the folding resistance is 9; the tensile strength of the sample 1-1 is 0.51±0.15kN/m ² and the folding resistance is 10; 2 The tensile strength is 0.2±0.10kN/m ² and the folding resistance is 5; the tensile strength of sample 2-1 is 0.58±0.22kN/m ² and the folding resistance is 9; the tensile strength of sample 2-2 is 0.61±0.20kN/m ² , the folding resistance is 6.

The results show that when the drying temperature is too high, the moisture of the sheet will evaporate too fast, causing cracks on the surface of the sheet, affecting the integrity of the sample structure, and reducing the tensile strength and folding resistance of the sample. When the moisture content of each layer is too high, it will cause the slurry to flow after the second layer of thick slurry is coated, resulting in uneven thickness in the middle and thin sides of the sample, which affects the folding endurance of the sample.

In summary, the embodiments of the present disclosure provide a method and product for preparing reconstituted tobacco using a thick slurry method. The method for preparing reconstituted tobacco using the thick slurry method includes: coating reconstituted tobacco slurry on a substrate, drying to obtain a first layer of tobacco flakes, superimposing a second layer of tobacco flakes on the first layer of tobacco flakes, and then using the uppermost layer of tobacco flakes As the substrate, the above steps are repeated at least once to prepare a reconstituted tobacco leaf laminated with tobacco sheets. The preparation of the above reconstituted tobacco leaf: the reconstituted tobacco leaf slurry is coated on the substrate by the thick slurry method, the coated slurry is dried to control the moisture content therein to obtain the tobacco sheet, and then the tobacco sheet is superimposed on the tobacco sheet again, Obtain a reconstituted tobacco leaf laminated with multiple layers of tobacco sheets. The method adopts an improved thick slurry method to prepare reconstituted tobacco leaves. Different tobacco sheets of reconstituted tobacco leaves can be directly glued without the use of adhesives for gluing. It has low water consumption and simple procedures. , Time-consuming and other advantages.

Compared with the prior art, the embodiments of the present disclosure have the following beneficial effects:

The multi-layer coating process provided by the thick slurry method provided in the embodiments of the present disclosure has a large operating space and can realize the combination of thin films with different characteristics. For example, reducing or even not using smoke powder in the first and third layers of thick slurry, and increasing the amount of fiber and glue, the three-layer thick slurry method sheet made can improve the overall toughness of the sheet and reduce the fragility of the sheet . The thick pulp method reconstituted tobacco leaf technology can better retain the original tobacco aroma and restore the special flavor of the tobacco itself. The thick pulp method tobacco sheet can maintain the original smoking quality and chemical composition of the tobacco, and has the characteristics of loose structure, better combustibility and filling ability. The production process has the advantages of low water consumption, simple process, and short time-consuming.

The above are only preferred embodiments of the present disclosure and are not used to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Industrial applicability

The method for preparing reconstituted tobacco using the thick slurry method provided in the present disclosure uses the thick slurry method to coat the reconstituted tobacco slurry on a substrate, and dry the coated slurry to control the moisture content in it to obtain a tobacco sheet, and then on the basis of the tobacco sheet The tobacco flakes are superimposed on the upper part again to obtain a reconstituted tobacco leaf with multiple layers of tobacco flakes superimposed. The method adopts an improved thick slurry method to prepare reconstituted tobacco. It has the advantages of low water consumption, simple process and short time-consuming.

Claims

A method for preparing reconstituted tobacco using a thick slurry method, characterized in that it comprises: coating reconstituted tobacco slurry on a substrate, drying to obtain a first layer of tobacco flakes, and superimposing a second layer on the first layer of tobacco flakes For the tobacco sheet, the uppermost tobacco sheet is used as the substrate, and the above-mentioned steps are repeated at least once to prepare a reconstituted tobacco leaf superimposed on the tobacco sheet.
The method according to claim 1, wherein the reconstituted tobacco leaf superimposed on the tobacco sheets is a reconstituted tobacco leaf superimposed on multilayer tobacco sheets and/or sandwiched tobacco sheets;

Preferably, in the reconstituted tobacco in which the multilayered tobacco sheets are superimposed, the second layer of tobacco sheets is made by coating the reconstituted tobacco slurry;

Preferably, in the reconstituted tobacco laminated with sandwiched tobacco sheets, the second layer of tobacco sheets is made of tobacco sheet samples.
The method according to claim 2, characterized in that the preparation of the reconstituted tobacco leaf laminated with the multilayered tobacco sheet comprises the following steps: coating the reconstituted tobacco leaf slurry on the substrate, drying to obtain the first layer of tobacco sheet, and then Re-coating the reconstituted tobacco leaf slurry on the first layer of tobacco sheet, drying to obtain a second layer of tobacco sheet, and then using the uppermost tobacco sheet as the substrate, repeating the above steps at least once to prepare a multilayered tobacco sheet Reconstitute tobacco leaves.
The method according to claim 3, wherein the drying temperature of each layer of the tobacco sheet is 60-80°C;

Preferably, the moisture content in each layer of the tobacco sheet after drying is controlled to be 10-20%.
The method according to claim 2, characterized in that the preparation of the laminated reconstituted tobacco sheets of sandwiched tobacco sheets comprises the following steps: coating the reconstituted tobacco slurry on the substrate, drying to obtain the first layer of tobacco sheets, and then The tobacco sheet sample is superimposed on the first layer of tobacco sheet, the reconstituted tobacco leaf slurry is coated on the tobacco sheet sample again, and the third layer of tobacco sheet is prepared by drying, and then the uppermost layer of tobacco sheet is used as the substrate, and the above is repeated The step is at least one time to prepare a reconstituted tobacco leaf laminated with sandwiched tobacco sheets.
The method according to claim 5, wherein the drying temperature of each layer of the tobacco sheet is 60-80°C;

Preferably, the moisture content in each layer of the tobacco sheet after drying is controlled to be 30-40%.
The method according to claim 6, wherein the tobacco sheet sample comprises any one or more of dry-processed tobacco flakes, thick pulp-processed tobacco flakes, paper-processed tobacco flakes, and paper substrates.
The method according to any one of claims 1-7, wherein the reconstituted tobacco leaf slurry used for coating each layer of the tobacco sheet can be adjusted according to requirements.
The method according to any one of claims 1-7, characterized in that, after stacking each layer of the tobacco flakes, they are dried at 60-80°C to control the moisture content of the final reconstituted tobacco leaves to 4 %the following.
A reconstituted tobacco leaf, characterized in that the reconstituted tobacco leaf is prepared by the method of any one of claims 1-9.
A method for preparing reconstituted tobacco using a thick slurry method is characterized in that it comprises the following steps:

Preparation of slurry: prepare the slurry required for coating of each layer according to a certain formula;

Multi-layer thick slurry method to make reconstituted tobacco leaves: spread the prepared first layer of thick slurry evenly on the substrate and dry to prepare the first layer of tobacco flakes, and then evenly coat the second layer of thick slurry on the first layer The tobacco sheet is applied and dried to obtain a second layer of tobacco sheet, and the uppermost layer of tobacco sheet is used as a substrate, and the above steps are repeated at least once to prepare a reconstituted tobacco leaf superimposed on the tobacco sheet.
The method according to claim 11, wherein the drying temperature of each layer of the tobacco sheet is 60-80°C.
The method according to claim 11 or 12, wherein the moisture content in each layer of the tobacco sheet after drying is controlled to be 10-20%.
The method according to any one of claims 11-13, characterized in that, in the process of preparing the slurry, it is prepared according to the ratio of tobacco powder: glue: fiber: water: glycerin=40:1:1:1:200:10 Each layer is coated with the required slurry.
The method according to any one of claims 11-13, characterized in that, in the process of preparing the slurry, it is prepared in a ratio of tobacco powder: glue: fiber: water: glycerin=60:1:1:200:10 The slurry required for coating the even-numbered layers is prepared, and the slurry required for coating the odd-numbered layers is prepared according to the ratio of smoke powder: glue: fiber: water: glycerin=20:1.5:2:200:10.
A method for preparing reconstituted tobacco using a thick slurry method is characterized in that it comprises the following steps:

Preparation of slurry: prepare the slurry required for coating of each layer according to a certain formula;

Sandwich thick slurry method to make reconstituted tobacco leaves: spread the prepared first layer of thick slurry evenly on the substrate and dry to obtain the first layer of tobacco flakes; spread the finished tobacco flakes on the first layer of tobacco flakes, As the second layer of tobacco flakes; spread the prepared third layer of thick slurry evenly on the second layer of tobacco flakes and dry to obtain the third layer of tobacco flakes; then use the uppermost layer of tobacco flakes as the substrate, and repeat the above steps At least once, a reconstituted tobacco leaf laminated with sandwiched tobacco sheets is prepared.
The method according to claim 16, wherein the drying temperature of each layer of the tobacco sheet is 60-80°C.
The method according to claim 16 or 17, characterized in that the moisture content in each layer of the tobacco sheet after drying is controlled to be 30-40%.
The method according to any one of claims 16-18, characterized in that, in the process of preparing the slurry, it is prepared according to the ratio of tobacco powder: glue: fiber: water: glycerin=40:1:1:200:10 Each layer is coated with the required slurry.