Method for improving physical index performance of paper-making reconstituted tobacco

Abstract

The invention discloses a method for improving the physical index performance of paper-making reconstituted tobacco, and belongs to the technical field of paper-making reconstituted tobacco processes. The preparation method comprises the following steps: performing superfine pulverization treatment on a tobacco raw material to prepare superfine powder, extracting and separating to obtain an extracting solution, mixing filter residues and slurry to prepare mixed slurry, and preparing a tablet base; and concentrating the extracting solution to prepare a coating solution, coating the coating solution with a film base, and drying to obtain a finished product. Fiber molecules, functional groups and free radicals in the coating liquid and the filter residues are intertwined, filled and bonded with cellulose fibers after fibrillation to form a compact mesh structure, so that the breakage rate of a reconstituted tobacco product in the tobacco shred making process is reduced; meanwhile, the content of volatile aroma components and the tensile strength of the reconstituted tobacco product are improved through the method.

Description

Technical Field

[0001] The invention relates to a method for improving the physical index performance of papermaking process reconstituted tobacco, and belongs to the technical field of papermaking process reconstituted tobacco. Background Art

[0002] Papermaking reconstituted tobacco is a product made by recombining and processing tobacco waste such as tobacco stems, tobacco scraps and fragments with the help of papermaking technology and equipment, which effectively utilizes tobacco waste, can reduce the cost of cigarette production, promote the harm reduction and tar reduction of cigarette products, improve the smoking quality, and enhance the overall quality of cigarette products. The content of volatile aroma components, processing resistance and tensile strength are its important physical indicators. However, after the papermaking reconstituted tobacco undergoes high temperature and high humidity treatment such as rehydration, feeding and drying during the silk making process, some fibers are separated from the reconstituted tobacco and become "flying fibers" and tobacco scraps, resulting in a final yield of only 71.6% to 90.8% in the cigarette stick, which limits the scope and amount of use of papermaking reconstituted tobacco in cigarettes, resulting in a waste of resources. At the same time, a large amount of dust will be generated at the production site, which will harm the production environment and affect the personal health of production personnel. The existing technology mainly studies the improvement of silk making process or functional additives to reduce the crushing rate of reconstituted tobacco silk making process. In addition, most of the domestic efforts to increase the content of volatile aroma components in papermaking reconstituted tobacco are to increase the content of volatile aroma components or give the product special aroma characteristics by adding traditional ingredients and flavoring. Existing reports all use the method of adding additives or fibers to increase the tensile strength of reconstituted tobacco products.

[0003] Therefore, how to effectively reduce the powder and residue loss of paper-making reconstituted tobacco leaves and increase the content of volatile aroma components and tensile strength is an urgent problem to be solved in the current production and processing of paper-making reconstituted tobacco leaves. Summary of the invention

[0004] In order to overcome the problems in the background technology, the present invention provides a method for improving the physical index performance of papermaking process regeneration, wherein the physical index performance includes volatile aroma components of tobacco leaves, reduction of crushing rate and tensile strength.

[0005] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0006] A method for improving the physical index performance of papermaking reconstituted tobacco, comprising the following steps:

[0007] (1) crushing tobacco raw materials to obtain ultrafine tobacco powder;

[0008] (2) mixing the ultrafine tobacco powder with water for extraction, and filtering after the extraction to obtain an extract and a filter residue;

[0009] (3) concentrating the extract to obtain a concentrated solution;

[0010] (4) mixing cellulose fibers with water and performing pulping according to a pulping process, and preparing cellulose fiber slurry after the pulping is completed;

[0011] (5) uniformly mixing the filter residue and the cellulose fiber slurry to prepare a mixed slurry;

[0012] (6) preparing a sheet base by papermaking the mixed slurry according to a papermaking method reconstituted tobacco sheet base papermaking molding process;

[0013] (7) coating the concentrated liquid and the sheet base according to the papermaking method reconstituted tobacco leaf coating process to prepare a coated sample;

[0014] (8) The coated sample is dried to obtain a reconstituted tobacco product.

[0015] As a preferred embodiment of the present invention, the ultrafine tobacco powder is at least one of tobacco leaf raw materials, tobacco leaf fragments, tobacco stems, and tobacco dust; the median particle size of the ultrafine tobacco powder is 139.20um to 10.72um, and the content of particles less than 20um is 16.64% to 81.29%.

[0016] As a preferred embodiment of the present invention, the mass ratio of the ultrafine tobacco powder to water is 920:4000.

[0017] As a preferred embodiment of the present invention, the extraction temperature is 60-75°C and the extraction time is 30-45 minutes.

[0018] As a preferred embodiment of the present invention, the cellulose fiber pulp has a Schober beating degree of 20 0 SR~70 0 SR.

[0019] As a preferred embodiment of the present invention, the mass volume ratio of the filter residue to the cellulose fiber slurry is 9:1-6:4.

[0020] As a preferred embodiment of the present invention, the base has an absolute dry weight of 40 g / m 2 ~60g / m 2 .

[0021] As a preferred embodiment of the present invention, the absolute dry weight of the coated sample is 72.5 g / m 2 ~150g / m 2 .

[0022] Beneficial effects of the present invention: The present invention prepares ultrafine powder by ultrafine pulverization and pulverization of tobacco raw materials, extracts and separates to obtain an extract, mixes the filter residue with the slurry to obtain a mixed slurry and prepares a sheet base; concentrates the extract to prepare a coating liquid, and coats the coating liquid with the sheet base and dries to obtain a finished product. The fiber molecules, functional groups, and free radicals in the coating liquid and the filter residue of the present invention are intertwined, filled, bonded, and form a dense mesh structure with the cellulose fibers after the silk-making process, thereby reducing the breakage rate of the reconstituted tobacco leaf product in the silk-making process, and at the same time, the volatile aroma component content and tensile strength of the reconstituted tobacco leaf product are improved by the method of the present invention. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with specific embodiments, but the protection scope of the present invention is not limited thereto.

[0024] All chemical reagents not specified in the examples and comparative examples of the present invention were commercially available analytically pure reagents for experiments.

[0025] Example 1

[0026] The method for improving the volatile aroma components and tensile strength of papermaking reconstituted tobacco leaves and reducing the crushing rate comprises the following steps:

[0027] (1) A tobacco raw material is pulverized by a pulverizing device to prepare an ultrafine tobacco powder, wherein the median diameter (D50) of the ultrafine tobacco powder is 53.93 μm, and the content of particles smaller than 20 μm is 22.61%. 920 kg (absolute dry weight) of the ultrafine tobacco powder is placed in an extraction tank, 4000 kg of water is added thereto, and extraction is performed at 70° C. for 30 minutes. After the extraction is completed, an extract and a filter residue are obtained by filtering, and the extract is concentrated to obtain a concentrated solution, which is used as a coating solution for standby use.

[0028] (2) Take 80 kg of wood pulp and pulp it according to the papermaking method of recycled tobacco pulping process. The Schober beating degree of the pulp is 40 0 SR, after pulping, the tobacco filter residue and cellulose fiber pulp are mixed at a mass ratio of 9:1, and after being fully stirred and mixed, the sheet base is prepared by the papermaking method of recycled tobacco leaf base sheet forming process. The basis weight of the sheet base is 55g / m 2 .

[0029] (3) The coating liquid is coated on the sheet base according to the papermaking method reconstituted tobacco leaf coating process, and the absolute dry weight of the reconstituted tobacco leaf after coating is controlled to be 105g / m 2 , and then dried and sliced ​​to obtain reconstituted tobacco leaves.

[0030] Example 2

[0031] The method for improving the volatile aroma components and tensile strength of papermaking reconstituted tobacco leaves and reducing the crushing rate comprises the following steps:

[0032] (1) A tobacco raw material is pulverized by a pulverizing device to prepare an ultrafine tobacco powder, wherein the median diameter (D50) of the ultrafine tobacco powder is 53.93 μm, and the content of particles smaller than 20 μm is 22.61%. 920 kg (absolute dry weight) of the ultrafine tobacco powder is placed in an extraction tank, 4000 kg of water is added thereto, and extraction is performed at 70° C. for 30 minutes. After the extraction is completed, an extract and a filter residue are obtained by filtering, and the extract is concentrated to obtain a concentrated solution, which is used as a coating solution for standby use.

[0033] (2) Take 80 kg of wood pulp and pulp it according to the papermaking method of recycled tobacco pulping process. The Schober beating degree of the pulp is 40 0 SR, after pulping, the tobacco filter residue and cellulose fiber pulp are mixed in a mass ratio of 6:4, and after being fully stirred and mixed, the sheet base is prepared by the papermaking method of recycled tobacco leaf base sheet forming process. The basis weight of the sheet base is 50g / m 2 .

[0034] (3) The coating liquid is coated on the sheet base according to the papermaking method reconstituted tobacco leaf coating process, and the absolute dry weight of the reconstituted tobacco leaf after coating is controlled to be 110g / m 2 , and then dried and sliced ​​to obtain reconstituted tobacco leaves.

[0035] Example 3

[0036] The method for improving the volatile aroma components and tensile strength of papermaking reconstituted tobacco leaves and reducing the crushing rate comprises the following steps:

[0037] (1) A tobacco raw material is pulverized by a pulverizing device to prepare an ultrafine tobacco powder, wherein the median diameter (D50) of the ultrafine tobacco powder is 139.20 μm and the content of particles smaller than 20 μm is 16.64%. 920 kg (absolute dry weight) of the ultrafine tobacco powder is placed in an extraction tank, 4000 kg of water is added thereto, and extraction is performed at 75° C. for 30 minutes. After the extraction is completed, an extract and a filter residue are obtained by filtering. The extract is concentrated to obtain a concentrated solution, and the concentrated solution is used as a coating solution for standby use.

[0038] (2) Take 80 kg of wood pulp and make pulp according to the papermaking method of recycled tobacco pulping process. The pulp has a Schober beating degree of 70 0 SR, after pulping, the tobacco filter residue and cellulose fiber pulp are mixed at a mass ratio of 9:1, and after being fully stirred and mixed, the sheet base is prepared by the papermaking method of recycled tobacco leaf base sheet forming process. The basis weight of the sheet base is 40g / m 2 .

[0039] (3) The coating liquid is coated on the sheet base according to the papermaking method reconstituted tobacco leaf coating process, and the absolute dry weight of the reconstituted tobacco leaf after coating is controlled to be 72.5g / m2 , and then dried and sliced ​​to obtain reconstituted tobacco leaves.

[0040] Example 4

[0041] The method for improving the volatile aroma components and tensile strength of papermaking reconstituted tobacco leaves and reducing the crushing rate comprises the following steps:

[0042] (1) A tobacco raw material is pulverized by a pulverizing device to prepare an ultrafine tobacco powder, wherein the median diameter (D50) of the ultrafine tobacco powder is 10.72 μm, and the content of particles smaller than 20 μm is 81.29%. 920 kg (absolute dry weight) of the ultrafine tobacco powder is placed in an extraction tank, 4000 kg of water is added thereto, and extraction is performed at 60° C. for 45 minutes. After the extraction is completed, an extract and a filter residue are obtained by filtering, and the extract is concentrated to obtain a concentrated solution, which is used as a coating solution for standby use.

[0043] (2) Take 80 kg of wood pulp and make pulp according to the papermaking method of recycled tobacco pulping process. The pulp has a Schober beating degree of 20 0 SR, after pulping, the tobacco filter residue and cellulose fiber pulp are mixed at a mass ratio of 9:1, and after being fully stirred and mixed, the sheet base is prepared by the papermaking method of recycled tobacco leaf base sheet forming process. The basis weight of the sheet base is 60g / m 2 .

[0044] (3) The coating liquid is coated on the sheet base according to the papermaking method reconstituted tobacco leaf coating process, and the absolute dry weight of the reconstituted tobacco leaf after coating is controlled to be 150g / m 2 , and then dried and sliced ​​to obtain reconstituted tobacco leaves.

[0045] Comparative Example 1

[0046] A method for preparing reconstituted tobacco leaves by a papermaking process comprises the following steps:

[0047] (1) 920 kg (absolute dry weight) of tobacco raw material is placed in an extraction tank, 4000 kg of water is added thereto, and extraction is performed at 70° C. for 30 minutes. After the extraction is completed, an extract and a filter residue are obtained by filtering, and the extract is concentrated to obtain a concentrated solution, which is used as a coating solution for later use; the tobacco filter residue is pulped according to a papermaking method reconstituted tobacco leaf pulping process, and the pulp has a Schober beating degree of 40 0 SR, prepare tobacco slurry for later use.

[0048] (2) Take 80 kg of wood pulp and pulp it according to the papermaking method of recycled tobacco pulping process. The Schober beating degree of the pulp is 40 0SR, after pulping, the tobacco pulp and cellulose fiber pulp are mixed at a mass ratio of 9:1, and after being fully stirred and mixed, the sheet base is prepared by the papermaking method of reconstituted tobacco leaf base sheet forming process. The absolute dry basis weight of the sheet base is 55g / m 2 .

[0049] (3) The coating liquid is coated on the sheet base according to the papermaking method reconstituted tobacco leaf coating process, and the absolute dry weight of the reconstituted tobacco leaf after coating is controlled to be 105g / m 2 , and then dried and sliced ​​to obtain reconstituted tobacco leaves.

[0050] Comparative Example 2

[0051] A method for preparing reconstituted tobacco leaves by a papermaking process comprises the following steps:

[0052] (1) 920 kg (absolute dry weight) of tobacco raw material is placed in an extraction tank, 4000 kg of water is added thereto, and extraction is performed at 70° C. for 30 minutes. After the extraction is completed, an extract and a filter residue are obtained by filtering, and the extract is concentrated to obtain a concentrated solution, which is used as a coating solution for standby use;

[0053] (2) Take 80 kg of wood pulp and pulp it according to the papermaking method of recycled tobacco pulping process. The Schober beating degree of the pulp is 40 0 SR, after pulping, the tobacco powder residue and cellulose fiber pulp are mixed together in a mass ratio of 9:1, and after being fully stirred and mixed, the sheet base is prepared by the papermaking method of recycled tobacco leaf base sheet forming process. The basis weight of the sheet base is 50g / m 2 .

[0054] (3) The coating liquid is coated on the sheet base according to the papermaking method reconstituted tobacco leaf coating process, and the absolute dry weight of the reconstituted tobacco leaf after coating is controlled to be 110g / m 2 , and then dried and sliced ​​to obtain reconstituted tobacco leaves.

[0055] The shredding rate, volatile aroma components and tensile strength of the reconstituted tobacco leaves prepared in Examples 1-4 and Comparative Examples 1-2 are shown in Tables 1, 2 and 3.

[0056] Table 1

[0057]

[0058]

[0059] Table 2

[0060]

[0061]

[0062]

[0063] Table 3

[0064]

[0065]

[0066] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A method for improving the physical index performance of papermaking reconstituted tobacco, characterized in that: The steps include: (1) crushing tobacco raw materials to obtain ultrafine tobacco powder; (2) mixing the ultrafine tobacco powder with water for extraction, and filtering after the extraction to obtain an extract and a filter residue; (3) concentrating the extract to obtain a concentrated solution; (4) mixing cellulose fibers with water and performing pulping according to a pulping process, and preparing cellulose fiber slurry after the pulping is completed; (5) uniformly mixing the filter residue and the cellulose fiber slurry to prepare a mixed slurry; (6) preparing a sheet base by papermaking the mixed slurry according to a papermaking method reconstituted tobacco sheet base papermaking molding process; (7) coating the concentrated liquid and the sheet base according to the papermaking method reconstituted tobacco leaf coating process to prepare a coated sample; (8) The coated sample is dried to obtain a reconstituted tobacco product.

2. The method for improving the physical index performance of reconstituted tobacco leaves according to claim 1, characterized in that: The ultrafine tobacco powder is at least one of tobacco leaf raw materials, tobacco leaf fragments, tobacco stems and tobacco dust; the median particle size of the ultrafine tobacco powder is 139.20um-10.72um, and the content of particles smaller than 20um is 16.64%-81.29%.

3. The method for improving the physical index performance of reconstituted tobacco leaves according to claim 1, characterized in that: The mass ratio of the ultrafine tobacco powder to water is 920:4000.

4. The method for improving the physical index performance of reconstituted tobacco leaves according to claim 1, characterized in that: The extraction temperature is 60-75°C and the extraction time is 30-45 minutes.

5. The method for improving the physical index performance of reconstituted tobacco leaves according to claim 1, characterized in that: The cellulose fiber pulp has a Schober beating degree of 20 0 SR~70 0 SR.

6. The method for improving the physical index performance of reconstituted tobacco leaves according to claim 1, characterized in that: The mass volume ratio of the filter residue to the cellulose fiber slurry is 9:1-6:

4.

7. The method for improving the physical index performance of reconstituted tobacco leaves according to claim 1, characterized in that: The base has an absolute dry weight of 40 g / m 2 ~60g / m 2 .

8. The method for improving the physical index performance of reconstituted tobacco leaves according to claim 1, characterized in that: The absolute dry weight of the coated sample is 72.5 g / m 2 ~150g / m 2 .

Images