CN111096470B - Reconstituted tobacco containing lyocell fibers and tobacco product not burning by heating - Google Patents

Abstract

The present invention relates to a reconstituted tobacco leaf containing lyocell fibers and a heat-not-burn tobacco product. The composition contains the following weight percentages: 0.3-20 wt % of lyocell fiber; 0.1-3 wt % of carbon fiber; and 5-30 wt % of smoking agent.

Description

Reconstituted tobacco leaves and heat-not-burn tobacco products containing lyocell fibers

technical field

The invention relates to the field of tobacco, in particular to a reconstituted tobacco leaf containing lyocell fibers and a heat-not-burn tobacco product.

Background technique

Reconstituted Tobacco is a flake or filamentous regenerated product made from tobacco powder, tobacco stems, shredded tobacco flakes and other tobacco substances as raw materials, combined with other fibers and accessories.

Reconstituted tobacco leaves can be divided into dry method, rolling method, thick pulp method and wet papermaking method according to different processing techniques.

Among them, the thick pulp method process is briefly as follows: pulverize the tobacco raw materials into smoke powder, mix with external fibers (such as wood pulp fibers), smoking agents, binders and water, stir to make pulp, and spread the pulp with a pulping device. On the surface of the metal base tape, it is dried, cooled, peeled off, and finally cut into finished reconstituted tobacco leaves of a certain specification.

Heat-not-burn tobacco product is a new type of tobacco product. When smoking, it heats the cartridge (containing an aerosol-forming substrate) without burning it. When heated, an aerosol is formed. The fumes, nicotine and aroma substances in the matrix are volatilized to generate smoke.

SUMMARY OF THE INVENTION

The present disclosure creatively uses lyocell fibers and carbon fibers for reconstituted tobacco leaves, and the obtained reconstituted tobacco leaves can be used as aerosol-forming substrates for heat-not-burn tobacco products, which can significantly increase the amount of smoke released when the heat-not-burn tobacco products are smoked , and the sensory suction quality is significantly improved.

In some aspects, a reconstituted tobacco leaf is provided, which contains the following components by weight:

Lyocell fiber 0.3-20wt% (eg 1-5wt%, eg 4-8wt%, eg 10-12wt%, eg 5-15wt%, eg 0.4-6.18wt%);

carbon fiber 0.1-3 wt% (eg 0.1-0.5 wt%, eg 0.2-1 wt%, eg 1-2 wt%, eg 2-3 wt%); and

5-30wt% of smoking agent (eg 5-10wt%, eg 10-15wt%, eg 13-17wt%, eg 15-20wt%, eg 20-25wt%, eg 25-30wt%).

The above weight percentages are calculated based on the total weight of the reconstituted tobacco leaves as 100 wt%.

In some embodiments, the reconstituted tobacco leaf further contains one or more of the following: tobacco raw material, added vegetable fibers, binders, and water.

In some embodiments, the sum of the percentages of the components that make up the reconstituted tobacco leaf is 100%. The components include, but are not limited to, lyocell fibers, carbon fibers, and smoking agents.

In some embodiments, the tobacco raw material is in powder form.

In some embodiments, the added plant fibers are selected from one or more of bamboo fibers, softwood fibers, hardwood fibers, flax fibers, and grass fibers.

In some embodiments, the binder is selected from one or more of guar gum, xanthan gum, carboxymethyl cellulose, and starch.

In some embodiments, the moisture content of the reconstituted tobacco leaves is 8-12 wt%.

In some embodiments, the thermal diffusivity of the reconstituted tobacco leaf is 1 to 10 mm ² /s (eg, 2 to 4 mm ² /s, such as 4 to 6 mm ² /s, such as 6 to 8 mm ² /s).

In some aspects, a preparation method of reconstituted tobacco leaf is provided, comprising the following steps

(1) making the raw material composition into a slurry;

(2) The pulp is made into reconstituted tobacco leaves by the thick pulp method.

According to the weight parts of each component in the raw material composition, the raw material composition includes:

70-90 parts of tobacco raw materials (for example, 75-85 parts);

0.1-3 parts of carbon fiber (for example, 0.1-0.5 parts, such as 0.5-1 parts, such as 1-2 parts, such as 2-3 parts);

0.1-10 parts of lyocell fiber (eg 0.1-0.5 parts, such as 0.5-1 parts, such as 1-2 parts, such as 2-4 parts, such as 4-6 parts, such as 6-8 parts, such as 8-10 parts );

Add 1-10 parts of plant fibers (for example, 1-2 parts, such as 2-4 parts, such as 4-6 parts, such as 6-8 parts, such as 8-10 parts);

15-25 parts of smoking agent (such as 15-18 parts, such as 18-22 parts, such as 22-25 parts);

0.5 to 2 parts of binder (for example, 0.5 to 1 part, for example, 1 to 1.5 parts, for example, 1.5 to 2 parts);

Optionally, the raw material composition further includes water.

In some embodiments, the content of water in the raw material composition is 40-60 wt%.

In some embodiments, step (2) includes the following operations: spreading the slurry on the metal base belt of the thick pulp method reconstituted tobacco leaf production equipment, and the metal base belt carrying the slurry passes through a drying section, so that the slurry is dried A sheet is formed, and the sheet is peeled off from the metal base tape to obtain reconstituted tobacco leaves.

In some embodiments, the tobacco raw material is in powder form.

In some embodiments, the powdered tobacco material can pass through an 80-120 mesh screen.

In some embodiments, the powdered tobacco material cannot pass through a 250-350 mesh screen.

In some embodiments, the added plant fibers are selected from one or more of bamboo fibers, softwood fibers, hardwood fibers, flax fibers, and grass fibers.

In some embodiments, the softwood fibers are the product of the disintegration of softwood pulp sheets to a dispersed state of individual fibers.

In some embodiments, the binder is selected from one or more of guar gum, xanthan gum, carboxymethyl cellulose, and starch.

In some embodiments, the smoking agent contains glycerin and propylene glycol.

In some embodiments, the smoking agent contains 70-90 mass % glycerol and 10-30 mass % propylene glycol.

In some embodiments, the reconstituted tobacco leaf is sheet or filament.

In some aspects, there is provided a heat-not-burn tobacco product comprising the reconstituted tobacco leaf of any of the above.

In some embodiments, the heat-not-burn tobacco product is a heat-not-burn tobacco product.

In some aspects, the use of lyocell fibers in the manufacture of reconstituted tobacco leaf is provided.

In some embodiments, the reconstituted tobacco leaf serves as an aerosol-forming substrate for a heat-not-burn tobacco product.

In some embodiments, the reconstituted tobacco leaf is reconstituted tobacco leaf used for heat-not-burn tobacco products.

In some embodiments, the content of lyocell fibers in the reconstituted tobacco leaf is 0.5-20 wt %, such as 0.5-5 wt %, such as 5-10 wt %, such as 10-15 wt %, such as 15-20 wt %.

In some embodiments, the equipment for preparing reconstituted tobacco leaves by the thick slurry method includes a spreading mechanism, a metal base belt, a drying mechanism and a scooping mechanism. When working, the material spreading mechanism spreads the slurry on the metal base belt, and the metal base belt carrying the slurry passes through the drying mechanism, so that the slurry is dried to form a thin sheet. , to obtain reconstituted tobacco leaves.

In some embodiments, the reconstituted tobacco leaves prepared by the methods of the present disclosure conform to the standard YC/T 16-2014 for reconstituted tobacco leaves, which is hereby incorporated by reference in its entirety.

In some embodiments, the sum of the contents of all components used to make up the reconstituted tobacco leaf is 100%.

Terminology Explanation

If the following terms are used in this disclosure, they may have the following meanings

The term "tobacco material" is selected from one or more of tobacco leaves, tobacco stems, and tobacco powder.

The term "heat-not-burn tobacco product" refers to a class of tobacco products that, when in use, allows the cartridge (containing the aerosol-forming substrate) to remain heated but not ignited.

Lyocell is a regenerated cellulose fiber produced by wet spinning after dissolving lignocellulose in an aqueous solution of N-methoxymorpholine (NMMO for short).

Carbon fibers refer to fibers with a carbon content higher than 90%, and their thermal conductivity is relatively high, for example, reaching 400-700 W/m/K. Carbon fiber can be fired at high temperature from fibers such as viscose, acrylic, aramid, and polyimide.

Plant fibers are processed into pulp boards (or pulp) from bamboo, wood, flax, grass and other plant raw materials by chemical or mechanical methods, and then the pulp boards (or pulp) are crushed and defibrated until the single fibers are basically mutually dispersed product. The chemical method may include caustic soda method, sulfate method or sulfite method, etc.; mechanical pulp may include grindstone groundwood pulp, disc refiner mechanical pulp or thermomechanical pulp and the like.

Softwood fibers, fibers of softwood. Coniferous wood refers to trees with needle-shaped, bar-shaped or scaly leaves, such as spruce, fir, masson pine, larch, slash pine, loblolly, etc.

beneficial effect

One or more aspects of the present disclosure have one or more of the following beneficial effects:

1) The reconstituted tobacco leaves can accommodate more smoking agents, and the surface is dry and no liquid seeps out;

2) The thermal diffusivity of reconstituted tobacco leaves is higher;

3) Reconstituted tobacco leaves are used for heat-not-burn tobacco products, and the smoke volume is higher;

4) Used for heat-not-burn tobacco products, the tobacco has good aroma, clean aftertaste and better sensory quality.

Detailed ways

The embodiments of the present disclosure will be described in detail below with reference to the examples, but those skilled in the art will understand that the following examples are only used to illustrate the present disclosure and should not be regarded as limiting the scope of the present disclosure. If the specific conditions are not indicated in the examples, it is carried out according to the conventional conditions or the conditions suggested by the manufacturer. The reagents or instruments used without the manufacturer's indication are conventional products that can be obtained from the market.

The raw materials used in the following examples and comparative examples are shown in the following table:

Table 1

Examples 1 to 3

Prepare reconstituted tobacco leaf with thick pulp method according to the raw material formula of table 2:

(1) Mix powdered tobacco raw material, carbon fiber, lyocell fiber, softwood fiber, guar gum, and smoking agent (90% by mass glycerol+10% by mass propylene glycol), add water (about 45° C.), and stir to form a slurry;

(2) Spreading the slurry above on the metal base belt of the thick slurry method reconstituted tobacco leaf production equipment, the metal base belt carrying the slurry passes through the drying section, so that the slurry is dried to form a thin sheet, and after cooling, the thin sheet is removed from the metal Peeling off the base tape to obtain a reconstituted tobacco product with a moisture content of 10±1wt%;

Wherein, the powdered tobacco raw material is obtained by the following method: the tobacco raw material (tobacco leaf) is shredded, pulverized, ground, and sieved to obtain 100-300 mesh (that is, through the 100-mesh sieve, not through the 300-mesh sieve) powder, which is Powdered tobacco raw material.

Wherein, the softwood fiber is obtained by the following method: the softwood fiber pulp board is subjected to crushing and defibration treatment, specifically, it is first roughly crushed to 1.0-2.0 cm ² by a hammer crusher, and then defibrated by a sawtooth fine crusher. To single fibers, the obtained products in which the single fibers are basically dispersed with each other are softwood fibers.

Comparative Examples 1 to 3

The difference between Comparative Examples 1 to 3 and Examples 1 to 3 is that the carbon fibers and lyocell fibers in the raw materials are replaced with the same weight of softwood fibers.

The raw material formulations of Examples 1 to 3 and Comparative Examples 1 to 3 and the contents of smoking agent, carbon fiber, lyocell fiber and softwood fiber in the reconstituted tobacco leaf products are shown in Table 2 below.

Table 2

Riddle

Item 1: Smoking Agent Content

In terms of appearance, the reconstituted tobacco leaf products of Examples 1 to 3 and Comparative Examples 1 to 2 are all surface dry, and there is no liquid exudation. A small amount of residual liquid oozes out from the surface of the reconstituted tobacco leaf product of Comparative Example 3.

According to the standard of YC/T243-2008 "Gas Chromatography for Determination of 1,2-Propanediol and Glycerol in Tobacco and Tobacco Products", the content of smoking agent in the reconstituted tobacco leaf products of Examples 1-3 and Comparative Examples 1-3 was detected , the results are shown in Table 3.

Item 2: Thermal diffusivity

According to GB/T22588-2008 "Flash Method Measurement of Thermal Diffusivity or Thermal Conductivity", the thermal diffusivity in the reconstituted tobacco products of Examples 1 to 3 and Comparative Examples 1 to 3 was tested, and the results are shown in Table 3.

table 3

Item 3: Smoke volume and sensory quality

The reconstituted tobacco leaves of Examples 1 to 3 and Comparative Examples 1 to 3 were cut into shredded tobacco with a width of 0.8 to 1 mm, and replaced the tobacco core section of the existing heat-not-burn tobacco product IQOS/HeatSticks cartridges on the market, and the filling amount of shredded tobacco was 0.32g/ branch.

Seven professional tobacco smokers were organized to smoke the above heat-not-burn tobacco products, and scored the smoke volume and sensory quality, and then averaged the scores.

Among them, the full score of sensory quality is 100 points, and the scoring standard generally refers to GB 5606.4-2005 "Cigarette Part 4 Sensory Technical Requirements", but for the sensory quality evaluation of heat-not-burn tobacco products, the following major indicators "smoke temperature (full score 20 points); smoke volume (out of 20 points); number of puffs (out of 20 points); aroma style (out of 16 points); satisfaction (out of 8 points); comfort (out of 8 points); odor (out of 8 points) score)”, with a total score of 100 points for evaluation. The scoring results are shown in Table 4 below.

Table 4

As shown in Table 3 and Table 4, compared with Comparative Examples 1 to 3, the reconstituted tobacco leaves of Examples 1 to 3 were used for heat-not-burn tobacco products, and indeed showed the following beneficial effects:

1) The reconstituted tobacco leaves can accommodate more smoking agents, and the surface is dry and no liquid seeps out;

2) The thermal diffusivity of reconstituted tobacco leaves is higher;

3) Reconstituted tobacco leaves are used for heat-not-burn tobacco products, and the smoke volume is higher;

4) Used for heat-not-burn tobacco products, the tobacco has good aroma, clean aftertaste and better sensory quality.

From the above experimental results, it can be inferred that carbon fiber and lyocell fiber synergistically improve the overall performance of reconstituted tobacco leaves, increase the amount of smoke, and improve the sensory quality.

Although the embodiments of the present invention have been described in detail, those skilled in the art will understand that various modifications and changes can be made to the details in accordance with all the teachings disclosed, and these changes are all within the protection scope of the present invention. The full scope of the invention is given by the appended claims and any equivalents thereof.

Claims (7)

1. The application of the lyocell fibers in improving the smoke quantity of the reconstituted tobacco, wherein the preparation method of the reconstituted tobacco comprises the following steps

(1) Preparing the raw material composition into slurry;

(2) preparing the pulp into reconstituted tobacco by a thick pulp method;

the raw material composition comprises the following components in parts by weight:

70-90 parts of powdered tobacco raw materials;

0.1-3 parts of carbon fiber;

0.4-10 parts of lyocell fiber;

1-10 parts of softwood fiber;

15-25 parts of a smoke agent;

0.5-2 parts of a binder;

the lyocell percentage in the reconstituted tobacco is 0.4-10 wt%;

the smoke agent percentage in the reconstituted tobacco is 10-20 wt%.

2. Use according to claim 1, step (2) comprising the following operations: and (3) spreading the slurry on a metal base belt of the reconstituted tobacco production equipment adopting a thick slurry method, allowing the metal base belt loaded with the slurry to pass through a drying section, drying the slurry in the drying section to form a thin sheet, and peeling the thin sheet from the metal base belt to obtain the reconstituted tobacco.

3. Use according to claim 1, having one or more of the following characteristics:

-said raw material composition further comprises water

-the binder is selected from one or more of guar gum, xanthan gum, carboxymethyl cellulose and starch.

4. The use according to claim 1, wherein the reconstituted tobacco comprises the following components in percentage by weight:

4-10 wt% of lyocell fiber;

0.1-3 wt% of carbon fiber; and

13-17 wt% of smoke agent.

5. The use according to claim 4, wherein the content of lyocell fibers in the reconstituted tobacco is 4-8 wt%.

6. The use according to claim 2, the smoke agent comprising propylene glycol and glycerol.

7. Use according to claim 1, having one or more of the following characteristics:

the water content of the reconstituted tobacco is 8-12 wt%;

the thermal diffusion coefficient of the reconstituted tobacco is 1-10 mm²/s。