WO2021103732A1 - 透气度与紧度可调控的干法再造烟叶及其制备方法与应用 - Google Patents

透气度与紧度可调控的干法再造烟叶及其制备方法与应用 Download PDF

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WO2021103732A1
WO2021103732A1 PCT/CN2020/113252 CN2020113252W WO2021103732A1 WO 2021103732 A1 WO2021103732 A1 WO 2021103732A1 CN 2020113252 W CN2020113252 W CN 2020113252W WO 2021103732 A1 WO2021103732 A1 WO 2021103732A1
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Prior art keywords
coating
reconstituted tobacco
dry
tobacco
coating liquid
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PCT/CN2020/113252
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English (en)
French (fr)
Inventor
赵德清
邓永
黄玉川
韩咚林
包毅
史健阳
郭林青
梁坤
郑怡
陶栩
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四川三联新材料有限公司
四川中烟工业有限责任公司
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Priority to UAA202201443A priority Critical patent/UA128322C2/uk
Priority to JOP/2022/0123A priority patent/JOP20220123A1/ar
Priority to EP20891700.5A priority patent/EP4066653A4/en
Publication of WO2021103732A1 publication Critical patent/WO2021103732A1/zh

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    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/10—Chemical features of tobacco products or tobacco substitutes
    • A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
    • A24B15/14—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco made of tobacco and a binding agent not derived from tobacco
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/10—Chemical features of tobacco products or tobacco substitutes
    • A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
    • A24B15/18—Treatment of tobacco products or tobacco substitutes
    • A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
    • A24B15/281—Treatment of tobacco products or tobacco substitutes by chemical substances the action of the chemical substances being delayed
    • A24B15/283—Treatment of tobacco products or tobacco substitutes by chemical substances the action of the chemical substances being delayed by encapsulation of the chemical substances
    • A—HUMAN NECESSITIES
    • A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
    • A24B3/00—Preparing tobacco in the factory
    • A24B3/14—Forming reconstituted tobacco products, e.g. wrapper materials, sheets, imitation leaves, rods, cakes; Forms of such products

Definitions

  • the invention belongs to the technical field of reconstituted tobacco in the tobacco industry. More specifically, the present invention relates to a dry reconstituted tobacco with adjustable air permeability and tightness, and a preparation method and application method thereof.
  • the dry-process reconstituted tobacco is suitable for heating the core material used in the smoking section of non-burning cigarettes.
  • Reconstituted tobacco also known as tobacco flakes or reconstituted tobacco.
  • Heating cigarettes are one of the important forms of new tobacco products, mainly by heating the tobacco material at a lower temperature (below 350°C) to release the endogenous and exogenous components in the tobacco, thereby satisfying consumers' certain sensory enjoyment And physical satisfaction.
  • the combustion cone of traditional cigarettes can reach or even exceed 900°C, while the heating temperature of heated cigarettes usually does not exceed 350°C.
  • the preparation processes of reconstituted tobacco for heating cigarettes at home and abroad mainly include thick slurry method, roll pressing method, wet papermaking method, dry papermaking method and so on.
  • Dry-process reconstituted tobacco is a dry-process film base made by air-laid technology as the coating substrate, and the coating solution containing tobacco particles, smokers, tobacco extracts and other components is transferred by multiple coatings. To the surface of the substrate, a reconstituted tobacco product is obtained through multi-stage drying.
  • the dry-process reconstituted tobacco preparation method is a new technology and new process.
  • patent document CN103431514B discloses a dry process.
  • Patent document CN103798948A discloses a drying device for dry papermaking method to produce reconstituted tobacco leaf
  • patent document CN103960766A discloses a dry papermaking method to produce reconstituted tobacco leaf substrate forming device
  • patent document CN105212257A discloses a substrate forming device for dry papermaking to produce reconstituted tobacco
  • Patent document CN103783653A discloses a substrate forming device for dry papermaking to produce reconstituted tobacco.
  • Patent document CN103960767A discloses a dry papermaking
  • Patent document CN103960768A discloses a slurry spraying device for the production of reconstituted tobacco by dry papermaking method
  • patent document CN103892440A discloses a device for producing reconstituted tobacco by dry papermaking method (including sequentially connected Defibration device, substrate forming device, slurry spraying device and drying device).
  • Patent document CN104824824B discloses a reconstituted tobacco produced by dry papermaking technology and loaded with tobacco fragments. In the method, the tobacco chips are added to the coating liquid slurry used in the substrate forming process and spraying respectively.
  • patent document CN103315376A discloses a Patent document CN103222676A discloses a method for manufacturing reconstituted tobacco leaf substrate by dry papermaking method
  • patent document CN108451001A discloses a dry method for heating non-burning cigarettes
  • dry reconstituted tobacco is characterized by high air permeability, high porosity, high bulk, low compactness and filling density. These characteristics are required for high filling values. It is undoubtedly correct for traditional cigarettes with low filling density to use reconstituted tobacco, but for heated cigarettes, these characteristics are not advantages, but may be disadvantages.
  • the sensory quality requirements of heated cigarettes are the compass that determines the preparation process and physical and chemical properties of reconstituted tobacco.
  • the key sensory indicators such as thick and plump, delicate and soft smoke, durability, and stability require dry reconstituted tobacco to have reasonable air permeability and tightness. degree.
  • the technical problem to be solved by the present invention is: in view of the high air permeability and low tightness of traditional dry-process reconstituted tobacco, the problems that affect the thick and plumpness of the smoke, the softness of the smoke, the durability of suction, and the stability are provided.
  • a method for preparing dry reconstituted tobacco with adjustable air permeability and tightness is provided.
  • the preparation method of dry reconstituted tobacco includes the following steps:
  • Step 1 Air-laid process is used to prepare dry-process film base, and the dry film base has a basis weight of 10g/m 2 -70g/m 2 ;
  • Step two prepare three kinds of coating liquids: coating liquid L, coating liquid M, and coating liquid S; in parts by weight, the amount of the coating liquid L, coating liquid M, and coating liquid S formulations It is: 5-25 parts of tobacco particles, 2-12 parts of smokers, 2-8 parts of adhesives, 1-6 parts of tobacco extracts, 1-3 parts of dispersants, 1-3 parts of stabilizers, and tobacco flavors 1-4 parts, 70-90 parts of water; the solid content of coating liquid L, coating liquid M, and coating liquid S is 10%-20%, and the viscosity is 50mPa ⁇ s-3000mPa ⁇ s; among them, L coating Tobacco particles in the liquid are relatively large particles with a particle size range of 250 ⁇ m-106 ⁇ m (equivalent to 60 mesh-150 meshes).
  • Tobacco particles in the M coating solution are medium particles with a particle size range of 106 ⁇ m-48 ⁇ m (equivalent to 150 meshes). Mesh-300 mesh), the tobacco particles in the S coating solution are relatively small particles, with a particle size range of 48um-25 ⁇ m (equivalent to 300 mesh-500 mesh);
  • Step 3 Use multiple spray coating to transfer at least two of the coating liquid L, coating liquid M, and coating liquid S in step 2 to the dry film base in sequence Transfer at least two of the coating liquid L, coating liquid M, and coating liquid S in step 2 to the opposite side of the dry film base and the front side of the dry film base in turn
  • the spraying sequence and the reverse spraying sequence follow the principle of the overall sequence of coating liquid L first, coating liquid M second, and coating liquid S last. Each spraying is followed by hot air drying to obtain semi-finished dry reconstituted tobacco;
  • Step 4 Prepare coating solution X without tobacco particles; in parts by weight, the dosage of coating solution X is: 20-70 parts of tobacco extract, 5-20 parts of smoker, 0-part of adhesive 6 parts, 10-70 parts of water; the solid content of the coating liquid X is 20%-70%, and the viscosity is 50mPa ⁇ s-3000mPa ⁇ s;
  • Step 5 Transfer the coating liquid X prepared in step 4 to the surface of the dry reconstituted tobacco semi-finished product obtained in step 3 by means of roll coating, dip coating, curtain coating or slit coating. Reconstituted tobacco semi-finished products are obtained after drying;
  • Step 6 the semi-finished reconstituted tobacco obtained in step 5 is subjected to surface finishing and thickness control by soft calendering, and the thickness control range is 0.16mm-0.30mm to obtain a reconstituted tobacco product.
  • the quantitative of the reconstituted tobacco product is 100g/ m 2 -200g/m 2 , thickness of 0.16mm-0.30mm, air permeability of 100CU-10000CU, tightness of 0.333g/cm 3 -1.250g/cm 3 , the smoker content of the reconstituted tobacco product is 10%- 20%, moisture content is 8%-16%.
  • spray coating methods include air spraying, high-pressure airless spraying or mixed air spraying; roll coating is single-sided or double-sided coating, and dip coating is double-sided coating.
  • curtain coating includes single-layer or multi-layer curtain coating, slit coating is single-layer or multi-layer slit coating; the coating rate of spray coating is 75%-85%, roll coating, dipping The coating rate of coating, curtain coating, and slit coating is 2%-40%.
  • Another object of the present invention is to provide a dry reconstituted tobacco leaf with adjustable air permeability and tightness, the key point of which is that it is prepared by the above-mentioned preparation method.
  • Another object of the present invention is to provide a preferred application method of the above dry reconstituted tobacco, so that the prepared cigarettes have better quality, and the specific solution is as follows: the above dry reconstituted tobacco is applied to the production of non-heated tobacco.
  • the cut tobacco is completely cut, instead of half cut or non-breaking technology, the dry-processed tobacco is cut into completely cut, completely separated, independent, non-involved, and non-adhesive single filaments.
  • Shape, the cut width of a single reconstituted tobacco leaf shred is 0.6mm-1.2mm.
  • the arrangement of the reconstituted tobacco leaf shreds in the smoking section is a neat and orderly arrangement or a chaotic and disorderly arrangement.
  • the neat and orderly arrangement means that all reconstituted tobacco shreds are parallel to the axial direction of the tobacco.
  • the sequence arrangement is that the partially reconstituted tobacco leaf shreds are not parallel to the tobacco axis.
  • the filling density of the reconstituted tobacco leaf shreds in the smoking section is 300 mg/cm 3 -800 mg/cm 3 .
  • the smoking section composed of reconstituted tobacco leaf shreds and the supporting section composed of the paper tube are made into composite rod A by the method of compounding the binary filter rod, and the cooling section composed of membrane paper composite material is composed of acetate fiber tow.
  • the filter section is made into composite rod B by using a binary filter rod compounding method, and composite rod A and composite rod B are rubbed by a cigarette machine and joined by tipping paper to form a heat-not-burn cigarette.
  • the cigarette forming method is a combination of "2+2" dual binary compound and tipping paper tipping.
  • the secondary aromatization technology of spray flavoring or filter stick injection is used to transfer the flavored ingredients to the inside of the basic rod of the smoking section
  • the said flavoring component is composed of one or more of the tobacco flavor, tobacco material liquid, tobacco extract and smoking agent; according to the weight of the reconstituted tobacco leaf as the measurement basis, the second flavoring The amount is 1%-15%.
  • paper-based composite materials with heat preservation and heat insulation or with the function of reflecting heat and uniform heat transfer are used, for example, aluminum foil paper, tin foil paper or containing
  • the forming paper of graphene material is used as the forming paper of the base rod of the smoking section, and the reconstituted tobacco leaf shreds are wrapped into the base rod of the smoking section.
  • the beneficial effects of the present invention are: in view of the loose and porous structure characteristics of the dry-process reconstituted tobacco leaf base structure and the variable pore size, the pores of different pore sizes can be filled by changing the particle size of the solids (tobacco particles) in the coating solution. , To achieve the first-level adjustment of air permeability and tightness; after spray coating, add a section of roll coating, dip coating, curtain coating, slit coating and other coating methods to achieve air permeability and tightness The second-level regulation of the reconstituted tobacco by adjusting the moisture and pressure during calendering to achieve the third-level regulation of air permeability and tightness.
  • the dry-process reconstituted tobacco provided by the present invention can reasonably adjust the air permeability and tightness of the reconstituted tobacco according to the requirements of different levels of sensory quality of high, medium and low quality of the heated cigarettes, thereby satisfying the quality of the heated cigarettes on the smoke characteristics demand.
  • the present invention has the following advantages and effects:
  • the dry-process reconstituted tobacco prepared by the present invention has the characteristics of adjustable air permeability and tightness, the adjustable range of air permeability is 100CU-10000CU, and the adjustable range of tightness is 0.333g/cm 3 -1.250g/cm 3 , It solves the defects of the existing dry-process reconstituted tobacco leaves that the air permeability is too high and the tightness is too low. According to the sensory quality requirements of the heated cigarette, the dry-process reconstituted tobacco corresponding to different ranges of air permeability and tightness can be selected.
  • the present invention aims at the characteristics of dry-process sheet base and dry-process reconstituted tobacco that are porous and variable in pore size. Tobacco particles of different diameters are used to fill the pores of different pores, and spray coating and roller coating are used.
  • the new coating method formed by the combination of dip coating, curtain coating or slit coating, uses calendering and finishing technology to adjust the surface properties and thickness, and achieves the three-fold air permeability and tightness of dry-process reconstituted tobacco. Level control.
  • the dry-process reconstituted tobacco prepared by the present invention is used in heating cigarettes. Compared with the existing dry-process reconstituted tobacco, the smoke is thick and plump, delicate and soft, and has significant indicators of durability, stability, consistency, etc. Improved, the sensory quality is significantly improved.
  • the dry-process reconstituted tobacco prepared by the present invention is not only suitable for the smoking section of the reconstituted tobacco leaf shreds arranged in an orderly manner, but also suitable for the smoking section of the reconstituted tobacco leaf shreds arranged in an orderly manner.
  • the adaptability of cigarette core materials is greatly improved.
  • Figure 1 is the surface microstructure diagram of dry reconstituted tobacco leaves of blank control (magnification 40 times).
  • Figure 2 is a diagram of the surface microstructure of the dry reconstituted tobacco leaf of Example 1 (magnification 40 times).
  • Fig. 3 is a microstructure diagram of the surface of dry reconstituted tobacco in Example 2 (magnification 40 times).
  • Figure 4 is a diagram of the surface microstructure of dry reconstituted tobacco in Example 3 (magnification 40 times).
  • the preparation method of dry reconstituted tobacco in the present invention includes the following steps:
  • Step 1 Air-laid process is used to prepare dry-process film base, and the dry film base has a basis weight of 10g/m 2 -70g/m 2 ;
  • Step two prepare three kinds of coating liquids: coating liquid L, coating liquid M, and coating liquid S; in parts by weight, the amount of the coating liquid L, coating liquid M, and coating liquid S formulations It is: 5-25 parts of tobacco particles, 2-12 parts of smokers, 2-8 parts of adhesives, 1-6 parts of tobacco extracts, 1-3 parts of dispersants, 1-3 parts of stabilizers, and tobacco flavors 1-4 parts, 70-90 parts of water; the smoker, adhesive, dispersant and stabilizer used are all food grade; the solid content of coating liquid L, coating liquid M, and coating liquid S is 10%-20%, the viscosity is 50mPa ⁇ s-3000mPa ⁇ s; among them, the tobacco particles in the L coating solution are relatively large particles with a particle size range of 250 ⁇ m-106 ⁇ m (equivalent to 60 meshes to 150 meshes), M coating Tobacco particles in the cloth solution are medium particles with a particle size range of 106 ⁇ m-48 ⁇ m (equivalent to 150 mesh-300 meshes), while the tobacco
  • Step 3 Use multiple spray coating to transfer at least two of the coating liquid L, coating liquid M, and coating liquid S in step 2 to the dry film base in sequence Transfer at least two of the coating liquid L, coating liquid M, and coating liquid S in step 2 to the opposite side of the dry film base and the front side of the dry film base in turn
  • the spraying sequence and the reverse spraying sequence follow the principle of the overall sequence of coating liquid L first, coating liquid M second, and coating liquid S last (for example, only coating liquid L and coating liquid M can be sprayed on the front side of a dry film base.
  • the coating liquid L is sprayed first, and then the coating liquid M) is sprayed, and each spraying is followed by hot air drying to obtain a semi-finished product of dry reconstituted tobacco;
  • Step 4 Prepare coating solution X without tobacco particles; in parts by weight, the dosage of coating solution X is: 20-70 parts of tobacco extract, 5-20 parts of smoker, 0-part of adhesive 6 parts, 10-70 parts of water; the solid content of the coating liquid X is 20%-70%, and the viscosity is 50mPa ⁇ s-3000mPa ⁇ s; the smokers and adhesives used are all food grade.
  • Step 5 Transfer the coating liquid X prepared in step 4 to the surface of the dry reconstituted tobacco semi-finished product obtained in step 3 by means of roll coating, dip coating, curtain coating or slit coating.
  • the semi-finished product of reconstituted tobacco leaves is obtained after hot air drying;
  • Step 6 the semi-finished reconstituted tobacco obtained in step 5 is subjected to surface finishing and thickness control by soft calendering, and the thickness control range is 0.16mm-0.30mm to obtain a reconstituted tobacco product.
  • the quantitative of the reconstituted tobacco product is 100g/ m 2 -200g/m 2 , thickness of 0.16mm-0.30mm, air permeability of 100CU-10000CU, tightness of 0.333g/cm 3 -1.250g/cm 3 , the smoker content of the reconstituted tobacco product is 10%- 20%, the moisture content is 8%-16%, and the smoker content of the reconstituted tobacco product can be further preferably 12%-18%.
  • the types of smoking agents are polyhydric alcohols, sugar alcohols, glycerides, etc., such as glycerin, 1,2-propylene glycol, 1,3-butanediol, sorbitol, mannitol, glycerol acetate, fatty acid esters, etc. .
  • spray coating methods include air spraying, high-pressure airless spraying or mixed air spraying; roll coating is single-sided or double-sided coating, and dip coating is double-sided coating.
  • curtain coating includes single-layer or multi-layer curtain coating, slit coating is single-layer or multi-layer slit coating; the coating rate of spray coating is 75%-85%, roll coating, dipping The coating rate of coating, curtain coating, and slit coating is 2%-40%.
  • the preferred scheme is as follows: when dry-process reconstituted tobacco is applied to the production of heat-not-burn cigarettes, the full cut tobacco technology is used instead of the semi-cut tobacco or non-breaking technology.
  • the dry-process reconstituted tobacco leaf is cut into a single filament form that is completely cut, completely separated from each other, independent of each other, not involved, and non-adhesive, and the cut width of a single reconstituted tobacco leaf shred is 0.6mm-1.2mm. It may be further preferred that the arrangement of the reconstituted tobacco leaf shreds in the smoking section is a neat and orderly arrangement or a disorderly arrangement.
  • the neat and orderly arrangement means that all reconstituted tobacco shreds are parallel to the axial direction of the tobacco.
  • the disorderly arrangement is that the partially reconstituted tobacco leaf shreds are not parallel to the tobacco axis.
  • the filling density of the reconstituted tobacco shreds in the smoking section is 300 mg/cm 3 -800 mg/cm 3 .
  • the smoking section composed of reconstituted tobacco shreds and the supporting section composed of paper tubes are used to make composite rod A by the method of compounding binary filter rods, and the cooling section composed of film-paper composite materials and the filter section composed of acetate fiber tow are used.
  • the binary filter rod is compounded to form the composite rod B, and the composite rod A and the composite rod B are spliced by a cigarette machine by rubbing the tipping paper to form a heating non-combustion cigarette. It is a combination of "2+2" double binary compound and tipping paper tipping.
  • the length of the smoking section containing the reconstituted tobacco leaves is in the range of 10mm-14mm
  • the length of the paper tube support section is in the range of 10mm-14mm
  • the length of the film-paper composite material cooling section is in the range of 14mm-18mm
  • the length of the cellulose acetate tow filter section The range is 6mm-10mm.
  • the secondary aromatization technology of spray flavoring or filter rod infusion is adopted to transfer the flavored ingredients to the inside of the basic rod of the smoking section.
  • the flavoring component is composed of one or more of the tobacco flavor, tobacco material liquid, tobacco extract, and smoking agent; based on the weight of the reconstituted tobacco leaf as a measurement basis, the amount of secondary flavoring is 1 %-15%.
  • a paper-based composite material with heat preservation and heat insulation or with the function of reflecting heat and uniform heat transfer is used, such as aluminum foil paper, tin foil paper or graphite
  • the forming paper of the olefin material is used as the forming paper of the base rod of the smoking section, and the reconstituted tobacco leaf shreds are wrapped into the base rod of the smoking section.
  • the air-laid process is used to prepare a dry film base with a basis weight of 20 g/m 2 .
  • the formulations of coating liquid L and coating liquid M are: 10 parts by weight of tobacco particles, 4 parts of smoking agent, 4 parts of adhesive, 3 parts of tobacco extract, 2 parts of dispersant, and 3 parts of stabilizer , 2 parts of tobacco flavor and 80 parts of water.
  • the coating liquid L has a solid content of 11.2% and a viscosity of 750 mPa ⁇ s
  • the coating liquid M has a solid content of 14.5% and a viscosity of 910 mPa ⁇ s.
  • the coating solution L is transferred to the front and back of the substrate after the first and second spraying, and the coating solution M is transferred to the front and the back of the substrate after the third and fourth spraying.
  • the amount is 25g/m 2 -30g/m 2 to obtain a semi-finished product of reconstituted tobacco.
  • a coating liquid X that does not contain tobacco particles but only contains tobacco extract and a smoking agent is prepared.
  • the solid content of the coating liquid X is 39% and the viscosity is 1020 mPa ⁇ s.
  • the coating liquid X is transferred to the surface of the reconstituted tobacco semi-finished product obtained by spraying four times by a single-sided roller coating, and the reconstituted tobacco semi-finished product is obtained after drying.
  • Reconstituted tobacco products have a basis weight of 123 g/m 2 , a thickness of 0.257 mm, an air permeability of 8530 CU, a tightness of 0.478 g/cm 3 and a corresponding sensory quality score of 78.5 points.
  • the air-laid process is used to prepare a dry film base with a basis weight of 30 g/m 2 .
  • the formulations of coating liquid L, coating liquid M, and coating liquid S are as follows: in parts by weight, 15 parts of tobacco particles, 6 parts of smoking agent, 5 parts of adhesive, and 4 parts of tobacco extract.
  • the coating liquid L is 11.2% and the viscosity is 650mPa ⁇ s.
  • the solid content of the coating liquid M is 14.5% and the viscosity is 870mPa ⁇ s.
  • the solid content of the coating liquid S is 13.5% and the viscosity is 980mPa ⁇ s. .
  • the coating liquid L is transferred to the front and back of the substrate after the first and second spraying, and the coating liquid M is transferred to the front and the back of the substrate after the third and fourth spraying.
  • a coating liquid X that does not contain tobacco particles but only contains tobacco extract and smoking agent is prepared, the solid content of the coating liquid X is 45%, and the viscosity is 1160 mPa ⁇ s.
  • the coating liquid X is transferred to the surface of the reconstituted tobacco semi-finished product obtained by spraying the previous five times by dipping and coating, and the reconstituted tobacco semi-finished product is obtained after drying.
  • the final product of French remanufactured tobacco leaves has a basis weight of 157 g/m 2 , a thickness of 0.224 mm, an air permeability of 5530 CU, a tightness of 0.701 g/cm 3 and a corresponding sensory quality score of 84.5 points.
  • the air-laid process is used to prepare a dry film base with a basis weight of 40 g/m 2 .
  • coating liquid L in parts by weight, 20 parts of tobacco particles, 9 parts of smoker, 6 parts of adhesive, and 5 parts of tobacco extract , 3 parts of dispersant, 3 parts of stabilizer, 4 parts of tobacco flavor, 85 parts of water.
  • the solid content of the coating liquid L is 14.4% and the viscosity is 580mPa ⁇ s.
  • the solid content of the coating liquid M is 12.7% and the viscosity is 930mPa ⁇ s.
  • the solid content of the coating liquid S is 15.2% and the viscosity is 1050mPa ⁇ s. .
  • the coating liquid L is transferred to the front and back of the substrate after the first and second spraying, and the coating liquid M is transferred to the front and the back of the substrate after the third and fourth spraying.
  • S is transferred to the front and back of the substrate after the fifth and sixth spraying, and the coating amount is 25g/m 2 -30g/m 2 each time to obtain a semi-finished product of reconstituted tobacco.
  • a coating liquid X that does not contain tobacco particles but only contains tobacco extract and a smoking agent is prepared.
  • the solid content of the coating liquid X is 55% and the viscosity is 1320 mPa ⁇ s.
  • the coating liquid X is transferred to the surface of the reconstituted tobacco semi-finished product obtained by spraying in the previous six times by means of single-layer curtain coating, and the reconstituted tobacco semi-finished product is obtained after drying. Afterwards, the dry reconstituted tobacco leaf product was obtained, which had a basis weight of 188 g/m 2 , a thickness of 0.184 mm, an air permeability of 3240 CU, a tightness of 1.022 g/cm 3 , and a corresponding sensory quality score of 89.5 points.
  • the experiment measured the basis weight, thickness, air permeability, tightness, and tensile strength of the dry-process reconstituted tobacco prepared in the above examples, and evaluated the sensory quality according to the sensory evaluation method of YC/T 498-2014 reconstituted tobacco (paper-making method). The final sensory quality score is shown, and the results are shown in Table 1.
  • GB/T 23227-2018 Determination of air permeability of cigarette paper, forming paper, tipping paper and materials with directional air-permeable belts.
  • Table 1 Comparison of the physical and chemical properties and sensory quality of improved dry-process reconstituted tobacco and traditional dry-process reconstituted tobacco
  • the dry-process reconstituted tobacco prepared by the present invention has the characteristics of adjustable air permeability and tightness.
  • the adjustable range of air permeability is 100CU-10000CU, and the adjustable range of tightness is 0.333g/cm 3 -1.250g/cm 3 , which solves the problem.
  • the dry-process reconstituted tobacco leaves have the defects of too high air permeability and too low tightness. According to the sensory quality requirements of heated cigarettes, you can choose to customize the dry-process tobacco leaves corresponding to different ranges of air permeability and tightness.

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Abstract

一种透气度与紧度可调控的干法再造烟叶及其制备方法与应用方法。针对干法再造烟叶片基结构疏松多孔的结构特点和孔径尺寸多变的特征，通过改变涂布液中固形物(烟草颗粒)的粒径大小来填补不同孔径的孔隙，实现透气度和紧度的第一级调控；通过在喷雾涂布之后增加一段辊式涂布、浸渍涂布或帘式涂布、狭缝涂布等涂布方式，实现透气度和紧度的第二级调控；通过调整压光时的水分和压力对再造烟叶进行表面整饰和厚度调节，实现透气度和紧度的第三级调控。该干法再造烟叶可以根据加热卷烟产品对感官质量高、中、低不同档位的需求，对再造烟叶的透气度和紧度进行合理调控，进而满足加热卷烟对烟气特性的品质需求。

Description

透气度与紧度可调控的干法再造烟叶及其制备方法与应用 技术领域
本发明属于烟草行业再造烟叶技术领域，更具体地，本发明涉及一种透气度与紧度可调控的干法再造烟叶及其制备方法与应用方法。该干法再造烟叶适用于加热不燃烧卷烟发烟段所用的烟芯材料。
背景技术
再造烟叶(Reconstituted Tobacco)，又称烟草薄片或重组烟草。加热型卷烟是新型烟草制品的重要形式之一，主要通过在较低温度下(350℃以下)加热烟草材料使烟草中内源性和外源性成分释放出来，从而满足消费者一定的感官享受和生理满足。传统卷烟的燃烧锥可以达到甚至超过900℃，而加热型卷烟的加热温度通常不超过350℃。目前国内外加热卷烟用再造烟叶的制备工艺主要有稠浆法、辊压法、湿法造纸法、干法造纸法等。
干法再造烟叶是以气流成网工艺制得的干法片基作为涂布基材，将含有烟草颗粒、发烟剂、烟草提取物等组分的涂布液利用多次涂布的方式转移至基材表面，经多级干燥制得再造烟叶成品。干法再造烟叶制备方法是一种新技术、新工艺，目前文献资料相对较少，已有的专利文献多集中在干法再造烟叶生产装备方面的探讨，例如专利文献CN103431514B公开了一种干法造纸法再造烟叶薄片整装生产线，专利文献CN103798948A公开了一种干法造纸法生产再造烟叶的烘干装置，专利文献CN103960766A公开了一种干法造纸法生产再造烟叶的基片成型装置，专利文献CN105212257A公开了一种用于干法造纸法生产再造烟叶的基片成型装置，专利文献CN103783653A公开了一种干法造纸法生产再造烟叶的基片成型装置，专利文献CN103960767A公开了一种干法造纸法生产再造烟叶的解纤装置，专利文献CN103960768A公开了一种干法造纸法再造烟叶生产的浆料喷涂装置，专利文献CN103892440A公开了一种干法造纸法生产再造烟叶的设备(包括依次连接的解纤装置、基片成型装置、浆料喷涂装置和烘干装置)。
目前已有的专利文献在干法再造烟叶制备方法方面的探讨较少，已知的在制备方法方面的专利文献如下：专利文献CN104824824B公开了一种以干法造纸技术制造的负载烟草碎片再造烟叶的方法，将烟草碎片分别添加至基片成型过程中和喷涂所用的涂布液浆料中，该方法能减少工序，减少过多的烟粉引起的掉粉扬尘现象；专利文献 CN103315376A公开了一种用干法造纸法制造的再造烟叶基片的方法；专利文献CN103222676A公开了一种干法造纸法制造再造烟叶基片的方法，专利文献CN108451001A公开了一种用于加热不燃烧卷烟的干法再造烟叶及其制备方法，其中的干法再造烟叶包括纤维薄层基片、烟草粉末、粘合剂、发烟剂、糖料和香味物质等。上述的专利文献虽然也涉及了制备方法，但也主要是在干法再造烟叶生产装备方面的探讨。针对干法再造烟叶的物理性能与感官质量的关系，对理化指标进行合理调控的技术手段相对缺乏。与稠浆法、辊压法、造纸法再造烟叶相比，干法再造烟叶的特点是透气度高、孔隙率高、松厚度高，紧度和填充密度较低，这些特性对于要求高填充值、低填充密度的传统卷烟用再造烟叶而言无疑是正确的，但对于加热型卷烟来说，这些特点并不是优势，反而可能是劣势。加热型卷烟的感官品质要求是决定再造烟叶制备工艺和理化性能的指南针，烟气浓厚饱满、细腻柔和、抽吸持久性、稳定性等关键感官指标要求干法再造烟叶具备合理的透气度和紧度。
发明内容
本发明所要解决的技术问题是：针对传统干法再造烟叶透气度较高、紧度较低，影响烟气浓厚饱满程度、烟气细腻柔和程度、抽吸持久性、稳定性的问题，提供一种透气度与紧度可调控的干法再造烟叶制备方法。
为解决上述技术问题本发明所采用的技术方案是：干法再造烟叶的制备方法，包括如下步骤：
步骤一，采用气流成网工艺制备得到干法片基，干法片基的定量为10g/m 2-70g/m 2；
步骤二，制备涂布液L、涂布液M、涂布液S共三种涂布液；以重量份数计，所述涂布液L、涂布液M、涂布液S配方的用量为：烟草颗粒5-25份、发烟剂2-12份、胶黏剂2-8份、烟草提取物1-6份、分散剂1-3份、稳定剂1-3份、烟用香精1-4份、水70-90份；涂布液L、涂布液M、涂布液S的固含量为10％-20％，黏度为50mPa·s-3000mPa·s；其中，L涂布液中烟草颗粒为较大颗粒，其粒径范围为250μm-106μm(相当于60目-150目)，M涂布液中烟草颗粒为中等颗粒，其粒径范围为106μm-48μm(相当于150目-300目)，S涂布液中烟草颗粒为较小颗粒，其粒径范围为48um-25μm(相当于300目-500目)；
步骤三，采用多次喷雾涂布的方式将步骤二中的涂布液L、涂布液M、涂布液S三种涂布液中的至少两种涂布液依次转移至干法片基的正面，将步骤二中的涂布液L、涂布液M、涂布液S三种涂布液中的至少两种喷涂液依次转移至干法片基的反面，干法片 基的正面喷涂顺序、反面喷涂顺序均遵循先涂布液L、其次涂布液M、最后涂布液S的整体顺序原则，每一次喷涂续接一次热风干燥，得到干法再造烟叶半成品；
步骤四，制备不含烟草颗粒的涂布液X；以重量份数计，涂布液X配方的用量为：烟草浸膏20-70份、发烟剂5-20份、胶黏剂0-6份、水10-70份；涂布液X的固含量为20％-70％，黏度为50mPa·s-3000mPa·s；
步骤五，将步骤四中制备得到的涂布液X，利用辊式涂布、浸渍涂布、帘式涂布或狭缝涂布的方式转移至步骤三得到的干法再造烟叶半成品表面，热风干燥后得到再造烟叶半成品；
步骤六，将步骤五中得到的再造烟叶半成品利用软压光进行表面整饰和厚度调控，厚度调控范围为0.16mm-0.30mm，制得再造烟叶成品，所述再造烟叶成品的定量为100g/m 2-200g/m 2，厚度为0.16mm-0.30mm，透气度为100CU-10000CU，紧度为0.333g/cm 3-1.250g/cm 3，再造烟叶成品的发烟剂含量为10％-20％、水分含量为8％-16％。
上述关于涂布方式的优选实施方式为：喷雾涂布方式包括空气喷涂、高压无气喷涂或混气喷涂；辊式涂布为单面或双面涂布，浸渍涂布为双面涂布，帘式涂布包括单层或多层帘式涂布，狭缝涂布为单层或多层狭缝涂布；喷雾涂布的涂布率为75％-85％，辊式涂布、浸渍涂布、帘式涂布、狭缝式涂布的涂布率为2％-40％。
本发明的另一目的在于提供一种透气度与紧度可调控干法再造烟叶，其关键点在通过上述的制备方法制备得到。
本发明的另一目的在于提供一种上述的干法再造烟叶的优选应用方法，以使得制备得到的卷烟具有更好的品质，其具体方案如下：将上述的干法再造烟叶应用于生产加热不燃烧卷烟时，采用烟丝全切断技术，而不是采用烟丝半切断或似断非断技术，将干法再造烟叶切成完全切断、彼此完全分开、相互独立、不牵连、不粘连的单根丝状形态，单根再造烟叶丝的切丝宽度为0.6mm-1.2mm。
进一步地是：再造烟叶丝在发烟段中的排列方式为整齐有序排列或者混乱无序排列，所述整齐有序排列是指所有再造烟叶丝均平行于烟支轴向，所述混乱无序排列为部分再造烟叶丝不平行于烟支轴向。
进一步地是：再造烟叶丝在发烟段中的填充密度为300mg/cm 3-800mg/cm 3。
进一步地是：再造烟叶丝构成的发烟段与纸管构成的支撑段利用二元滤嘴棒复合的方式制成复合棒A，采用膜纸复合材料构成的降温段与采用醋酸纤维丝束构成的过滤段利用二元滤嘴棒复合的方式制成复合棒B，将复合棒A与复合棒B采用卷烟机搓接的方 式经水松纸接装而成加热不燃烧卷烟烟支，所述烟支成型方式为“2+2”双二元复合与水松纸接装的组合。
进一步地是：再造烟叶在皱纸机上成型为发烟段基础棒的过程中，采用喷雾加香或滤嘴棒注香的二次加香技术，将加香成分转移至发烟段基础棒内部，所述的加香成分是由烟用香精、烟用料液、烟草提取物和发烟剂中的一种或几种成分构成；按照再造烟叶的重量为计量基准，所述二次加香的量为1％-15％。
进一步地是：再造烟叶在皱纸机上成型为发烟段基础棒的过程中，采用具有保温隔热或具有反射热量、均匀传热功能的纸基复合材料，例如将铝箔纸、锡箔纸或含有石墨烯材料的成形纸作为发烟段基础棒成形纸，将再造烟叶丝包裹成为发烟段基础棒。
本发明的有益效果是：针对干法再造烟叶片基结构疏松多孔的结构特点和孔径尺寸多变的特征，通过改变涂布液中固形物(烟草颗粒)的粒径大小来填补不同孔径的孔隙，实现透气度和紧度的第一级调控；通过在喷雾涂布之后增加一段辊式涂布、浸渍涂布或帘式涂布、狭缝涂布等涂布方式，实现透气度和紧度的第二级调控；通过调整压光时的水分和压力对再造烟叶进行表面整饰和厚度调节，实现透气度和紧度的第三级调控。本发明提供的干法再造烟叶可以根据加热卷烟产品对感官质量高、中、低不同档位的需求，对再造烟叶的透气度和紧度进行合理调控，进而满足加热卷烟对烟气特性的品质需求。
与现有技术相比，本发明具有以下优点和效果：
(1)本发明制备的干法再造烟叶具有透气度与紧度可调控的特点，透气度可调控范围为100CU-10000CU，紧度可调控范围为0.333g/cm 3-1.250g/cm 3，解决了现有干法再造烟叶透气度过高、紧度过低的缺陷，可根据加热卷烟的感官质量需求，选择不同区间范围的透气度和紧度对应的干法再造烟叶。
(2)本发明针对干法片基和干法再造烟叶结构疏松多孔和孔径尺寸多变的特征，利用不同粒径的烟草颗粒来填充不同孔径的孔隙，利用喷雾涂布与辊式涂布、浸渍涂布、帘式涂布或狭缝式涂布组合形成的新型涂布方式，利用压光整饰技术对表面性能和厚度进行调整，实现了对干法再造烟叶透气度和紧度的三级调控。
(3)本发明制备的干法再造烟叶用于加热型卷烟中，与现有干法再造烟叶相比，烟气浓厚饱满、细腻柔和，抽吸持久性、稳定性、前后一致性等指标显著提升，感官质量显著提高。
(4)本发明制备的干法再造烟叶，既适用于再造烟叶丝有序排列的发烟段，也适 用于再造烟叶丝无序排列的发烟段，满足内芯加热方式和外围加热方式对烟芯材料的需求，适应性大大提高。
附图说明
图1为空白对照样的干法再造烟叶表面显微结构图(放大40倍)。
图2为实施例1的干法再造烟叶表面显微结构图(放大40倍)。
图3为实施例2的干法再造烟叶表面显微结构图(放大40倍)。
图4为实施例3的干法再造烟叶表面显微结构图(放大40倍)。
具体实施方式
下面结合附图及实施例对本发明作进一步说明。
本发明中的干法再造烟叶的制备方法包括如下步骤：
步骤一，采用气流成网工艺制备得到干法片基，干法片基的定量为10g/m 2-70g/m 2；
步骤二，制备涂布液L、涂布液M、涂布液S共三种涂布液；以重量份数计，所述涂布液L、涂布液M、涂布液S配方的用量为：烟草颗粒5-25份、发烟剂2-12份、胶黏剂2-8份、烟草提取物1-6份、分散剂1-3份、稳定剂1-3份、烟用香精1-4份、水70-90份；所采用的发烟剂、胶黏剂、分散剂和稳定剂皆为食品级；涂布液L、涂布液M、涂布液S的固含量为10％-20％，黏度为50mPa·s-3000mPa·s；其中，L涂布液中烟草颗粒为较大颗粒，其粒径范围为250μm-106μm(相当于60目-150目)，M涂布液中烟草颗粒为中等颗粒，其粒径范围为106μm-48μm(相当于150目-300目)，S涂布液中烟草颗粒为较小颗粒，其粒径范围为48um-25μm(相当于300目-500目)；
步骤三，采用多次喷雾涂布的方式将步骤二中的涂布液L、涂布液M、涂布液S三种涂布液中的至少两种涂布液依次转移至干法片基的正面，将步骤二中的涂布液L、涂布液M、涂布液S三种涂布液中的至少两种喷涂液依次转移至干法片基的反面，干法片基的正面喷涂顺序、反面喷涂顺序均遵循先涂布液L、其次涂布液M、最后涂布液S的整体顺序原则(例如干法片基的正面可以只喷涂涂布液L和涂布液M，此时先喷涂涂布液L、后喷涂涂布液M)，每一次喷涂续接一次热风干燥，得到干法再造烟叶半成品；
步骤四，制备不含烟草颗粒的涂布液X；以重量份数计，涂布液X配方的用量为：烟草浸膏20-70份、发烟剂5-20份、胶黏剂0-6份、水10-70份；涂布液X的固含量为20％-70％，黏度为50mPa·s-3000mPa·s；所采用的发烟剂、胶黏剂皆为食品级。
步骤五，将步骤四中制备得到的涂布液X，利用辊式涂布、浸渍涂布、帘式涂布或狭缝涂布的方式转移至步骤三得到的干法再造烟叶半成品表面，经热风干燥后得到再造 烟叶半成品；
步骤六，将步骤五中得到的再造烟叶半成品利用软压光进行表面整饰和厚度调控，厚度调控范围为0.16mm-0.30mm，制得再造烟叶成品，所述再造烟叶成品的定量为100g/m 2-200g/m 2，厚度为0.16mm-0.30mm，透气度为100CU-10000CU，紧度为0.333g/cm 3-1.250g/cm 3，再造烟叶成品的发烟剂含量为10％-20％、水分含量为8％-16％，再造烟叶成品的发烟剂含量可进一步优选为12％-18％。其中的发烟剂的种类为多元醇、糖醇、甘油酯等，例如甘油、1,2-丙二醇、1,3-丁二醇，山梨醇、甘露糖醇、醋酸甘油酯、脂肪酸酯等。
上述关于涂布方式的优选实施方式为：喷雾涂布方式包括空气喷涂、高压无气喷涂或混气喷涂；辊式涂布为单面或双面涂布，浸渍涂布为双面涂布，帘式涂布包括单层或多层帘式涂布，狭缝涂布为单层或多层狭缝涂布；喷雾涂布的涂布率为75％-85％，辊式涂布、浸渍涂布、帘式涂布、狭缝式涂布的涂布率为2％-40％。
上述的干法再造烟叶的在具体应用时，优选方案如下：将干法再造烟叶应用于生产加热不燃烧卷烟时，采用烟丝全切断技术，而不是采用烟丝半切断或似断非断技术，将干法再造烟叶切成完全切断、彼此完全分开、相互独立、不牵连、不粘连的单根丝状形态，单根再造烟叶丝的切丝宽度为0.6mm-1.2mm。可进一步优选为：再造烟叶丝在发烟段中的排列方式为整齐有序排列或者混乱无序排列，所述整齐有序排列是指所有再造烟叶丝均平行于烟支轴向，所述混乱无序排列为部分再造烟叶丝不平行于烟支轴向。再造烟叶丝在发烟段中的填充密度为300mg/cm 3-800mg/cm 3。
再造烟叶丝构成的发烟段与纸管构成的支撑段利用二元滤嘴棒复合的方式制成复合棒A，采用膜纸复合材料构成的降温段与采用醋酸纤维丝束构成的过滤段利用二元滤嘴棒复合的方式制成复合棒B，将复合棒A与复合棒B采用卷烟机搓接的方式经水松纸接装而成加热不燃烧卷烟烟支，所述烟支成型方式为“2+2”双二元复合与水松纸接装的组合。优选地，含有所述再造烟叶的发烟段长度范围为10mm-14mm，纸管支撑段长度范围为10mm-14mm，膜纸复合材料降温段长度范围为14mm-18mm，醋纤丝束过滤段长度范围为6mm-10mm。
再造烟叶在皱纸机上成型为发烟段基础棒的过程中，采用喷雾加香或滤嘴棒注香的二次加香技术，将加香成分转移至发烟段基础棒内部，所述的加香成分是由烟用香精、烟用料液、烟草提取物和发烟剂中的一种或几种成分构成；按照再造烟叶的重量为计量基准，所述二次加香的量为1％-15％。优选地，再造烟叶在皱纸机上成型为发烟段基础棒 的过程中，采用具有保温隔热或具有反射热量、均匀传热功能的纸基复合材料，例如将铝箔纸、锡箔纸或含有石墨烯材料的成形纸作为发烟段基础棒成形纸，将再造烟叶丝包裹成为发烟段基础棒。
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
实施例1
将针叶木绒毛浆无水解纤后，利用气流成网工艺制得干法片基，定量为20g/m 2。制备涂布液L、涂布液M两种涂布液，其中，涂布液L中烟草颗粒的粒径范围为D90＝106μm，涂布液M中烟草颗粒的粒径范围为D90＝75μm。涂布液L、涂布液M的配方为：按重量份计，烟草颗粒10份、发烟剂4份、胶黏剂4份、烟草提取物3份、分散剂2份、稳定剂3份，烟用香精2份，水80份。涂布液L的固含量为11.2％，黏度为750mPa·s，涂布液M的固含量为14.5％，黏度为910mPa·s。将涂布液L经过第一次、第二次喷涂分别转移至基材正面和反面，将涂布液M经过第三次、第四次喷涂分别转移至基材正面和反面，每一次涂布量为25g/m 2-30g/m 2，得到再造烟叶半成品。制备不含烟草颗粒、只含烟草浸膏、发烟剂的涂布液X，涂布液X的固含量为39％，黏度为1020mPa·s。将涂布液X利用单面辊涂的方式转移至四次喷涂得到的再造烟叶半成品基材表面，烘干后得到再造烟叶半成品，所述再造烟叶半成品经过压光整饰、调节干燥后得到干法再造烟叶成品，其定量为123g/m 2，厚度为0.257mm，透气度为8530CU，紧度为0.478g/cm 3，对应的感官质量得分为78.5分。
实施例2
将针叶木绒毛浆无水解纤后，利用气流成网工艺制得干法片基，定量为30g/m 2。制备涂布液L、涂布液M、涂布液S三种涂布液，其中，涂布液L中烟草颗粒的粒径范围为D90＝106μm，涂布液M中烟草颗粒的粒径范围为D90＝75μm，涂布液S中烟草颗粒的粒径范围为D90＝48μm。涂布液L、涂布液M、涂布液S三种涂布液的配方为：按重量份计，烟草颗粒15份、发烟剂6份、胶黏剂5份、烟草提取物4份、分散剂2份、稳定剂3份，烟用香精3份，水80份。涂布液L的固含量为11.2％，黏度为650mPa·s，涂布液M的固含量为14.5％，黏度为870mPa·s，涂布液S的固含量为13.5％，黏度为980mPa·s。将涂布液L经过第一次、第二次喷涂分别转移至基材正面和反面，将涂布液M经过第三次、第四次喷涂分别转移至基材正面和反面，将涂布液S经过第五次喷涂 转移至基材正面或反面，每一次涂布量为25g/m 2-30g/m 2，得到再造烟叶半成品。制备不含烟草颗粒、只含烟草浸膏、发烟剂的涂布液X，涂布液X的固含量为45％，黏度为1160mPa·s。将涂布液X利用浸渍涂布的方式转移至前面五次喷涂得到的再造烟叶半成品基材表面，烘干后得到再造烟叶半成品，所述再造烟叶半成品经过压光整饰、调节干燥后得到干法再造烟叶成品，其定量为157g/m 2，厚度为0.224mm，透气度为5530CU，紧度为0.701g/cm 3，对应的感官质量得分为84.5分。
实施例3
将针叶木绒毛浆无水解纤后，利用气流成网工艺制得干法片基，定量为40g/m 2。制备涂布液L、涂布液M、涂布液S三种涂布液，其中，涂布液L中烟草颗粒的粒径范围为D90＝150μm，涂布液M中烟草颗粒的粒径范围为D90＝85μm，涂布液S中烟草颗粒的粒径范围为D90＝30μm。涂布液L、涂布液M、涂布液S三种涂布液的配方为：按重量份计，烟草颗粒20份、发烟剂9份、胶黏剂6份、烟草提取物5份、分散剂3份、稳定剂3份，烟用香精4份，水85份。涂布液L的固含量为14.4％，黏度为580mPa·s，涂布液M的固含量为12.7％，黏度为930mPa·s，涂布液S的固含量为15.2％，黏度为1050mPa·s。将涂布液L经过第一次、第二次喷涂分别转移至基材正面和反面，将涂布液M经过第三次、第四次喷涂分别转移至基材正面和反面，将涂布液S经过第五次、第六次喷涂转移至基材正面和反面，每一次涂布量为25g/m 2-30g/m 2，得到再造烟叶半成品。制备不含烟草颗粒、只含烟草浸膏、发烟剂的涂布液X，涂布液X的固含量为55％，黏度为1320mPa·s。将涂布液X利用单层帘式涂布的方式转移至前面六次喷涂得到的再造烟叶半成品基材表面，烘干后得到再造烟叶半成品，所述再造烟叶半成品经过压光整饰、调节干燥后得到干法再造烟叶成品，其定量为188g/m 2，厚度为0.184mm，透气度为3240CU，紧度为1.022g/cm 3，对应的感官质量得分为89.5分。
实施例效果说明：
实验测定了上述实施例制备的干法再造烟叶的定量、厚度、透气度、紧度、抗张强度，并按照YC/T 498-2014再造烟叶(造纸法)感官评价方法进行感官质量评价，给出了最终感官质量得分，结果见表1。
表1中记载的各种理化性能的测试方法与标准是：
纸和纸板定量的测定GB/T 451.2-2002；
GB/T 451.3-2002纸和纸板厚度、紧度的测定；
GB/T12914-2008纸和纸板抗张强度和伸长率的测定；
GB/T 23227-2018卷烟纸、成形纸、接装纸及具有定向透气带的材料透气度的测定。
表1：改良干法再造烟叶与传统干法再造烟叶理化性能及感官质量的对比
Figure PCTCN2020113252-appb-000001
从表1可以看出，与传统干法再造烟叶相比，3种改良干法再造烟叶的透气度均有所下降，降幅分别为15.1％、44.9％、67.8％，紧度均有所增大，增幅分别为25.7％、84.5％、168.9％，两个关键指标均得到合理调控，相应地，感官质量得分也较传统干法再造烟叶明显提高。特别地，3种改良干法再造烟叶的烟气特性均得到显著改善，烟气的浓厚饱满程度、细腻柔和程度，烟气的成团性等指标均得到提升，抽吸口数从6-7口提高至10-12口，且前几口与后面几口的稳定性和一致性较对照样均得到改善。
本发明制备的干法再造烟叶具有透气度与紧度可调控的特点，透气度可调控范围为100CU-10000CU，紧度可调控范围为0.333g/cm 3-1.250g/cm 3，解决了现有干法再造烟叶透气度过高、紧度过低的缺陷，可根据加热卷烟的感官质量需求，选择定制不同区间范围的透气度和紧度对应的干法再造烟叶。
尽管这里参照本发明的解释性实施例对本发明进行了描述，但是，应该理解，本领域技术人员可以设计出很多其他的修改和实施方式，这些修改和实施方式将落在本申请公开的原则范围和精神之内。更具体地说，在本申请公开的范围内，可以对主题组合布局的组成部件和/或布局进行多种变型和改进。除了对组成部件和/或布局进行的变型和改进外，对于本领域技术人员来说，其他的用途也将是明显的。

Claims (10)

  1. 透气度与紧度可调控的干法再造烟叶的制备方法，其特征在于，包括如下步骤：
    步骤一，采用气流成网工艺制备得到干法片基，干法片基的定量为10g/m 2-70g/m 2；
    步骤二，制备涂布液L、涂布液M、涂布液S共三种涂布液；以重量份数计，所述涂布液L、涂布液M、涂布液S配方的用量为：烟草颗粒5-25份、发烟剂2-12份、胶黏剂2-8份、烟草提取物1-6份、分散剂1-3份、稳定剂1-3份、烟用香精1-4份、水70-90份；涂布液L、涂布液M、涂布液S的固含量为10％-20％，黏度为50mPa·s-3000mPa·s；其中，L涂布液中烟草颗粒为较大颗粒，其粒径范围为250μm-106μm，M涂布液中烟草颗粒为中等颗粒，其粒径范围为106μm-48μm，S涂布液中烟草颗粒为较小颗粒，其粒径范围为48um-25μm；
    步骤三，采用多次喷雾涂布的方式将步骤二中的涂布液L、涂布液M、涂布液S三种涂布液中的至少两种涂布液依次转移至干法片基的正面，将步骤二中的涂布液L、涂布液M、涂布液S三种涂布液中的至少两种喷涂液依次转移至干法片基的反面，干法片基的正面喷涂顺序、反面喷涂顺序均遵循先涂布液L、其次涂布液M、最后涂布液S的整体顺序原则，每一次喷涂续接一次热风干燥，得到干法再造烟叶半成品；
    步骤四，制备不含烟草颗粒的涂布液X；以重量份数计，涂布液X配方的用量为：烟草浸膏20-70份、发烟剂5-20份、胶黏剂0-6份、水10-70份；涂布液X的固含量为20％-70％，黏度为50mPa·s-3000mPa·s；
    步骤五，将步骤四中制备得到的涂布液X，利用辊式涂布、浸渍涂布、帘式涂布或狭缝涂布的方式转移至步骤三得到的干法再造烟叶半成品表面，经热风干燥后得到再造烟叶半成品；
    步骤六，将步骤五中得到的再造烟叶半成品利用软压光进行表面整饰和厚度调控，厚度调控范围为0.16mm-0.30mm，制得再造烟叶成品，所述再造烟叶成品的定量为100g/m 2-200g/m 2，厚度为0.16mm-0.30mm，透气度为100CU-10000CU，紧度为0.333g/cm 3-1.250g/cm 3，再造烟叶成品的发烟剂含量为10％-20％、水分含量为8％-16％。
  2. 如权利要求1所述的干法再造烟叶的制备方法，其特征在于：喷雾涂布方式包括空气喷涂、高压无气喷涂或混气喷涂；辊式涂布为单面或双面涂布，浸渍涂布为双面涂布，帘式涂布包括单层或多层帘式涂布，狭缝涂布为单层或多层狭缝涂布；喷雾涂布的涂布率为75％-85％，辊式涂布、浸渍涂布、帘式涂布、狭缝式涂布的涂布率为2％-40％。
  3. 干法再造烟叶，其特征在于：根据权利要求1或2所述的制备方法制备得到。
  4. 干法再造烟叶的应用方法，其特征在于：将根据权利要求3所述的干法再造烟叶应用于生产加热不燃烧卷烟时，采用烟丝全切断技术，将干法再造烟叶切成完全切断、彼此完全分开、相互独立、不牵连、不粘连的单根丝状形态，单根再造烟叶丝的切丝宽度为0.6mm-1.2mm。
  5. 根据权利要求4所述的干法再造烟叶的应用方法，其特征在于：再造烟叶丝在发烟段中的排列方式为整齐有序排列或者混乱无序排列，所述整齐有序排列是指所有再造烟叶丝均平行于烟支轴向，所述混乱无序排列为部分再造烟叶丝不平行于烟支轴向。
  6. 根据权利要求4所述的干法再造烟叶的应用方法，其特征在于：再造烟叶丝在发烟段中的填充密度为300mg/cm 3-800mg/cm 3。
  7. 根据权利要求4所述的干法再造烟叶的应用方法，其特征在于：再造烟叶丝构成的发烟段与纸管构成的支撑段利用二元滤嘴棒复合的方式制成复合棒A，采用膜纸复合材料构成的降温段与采用醋酸纤维丝束构成的过滤段利用二元滤嘴棒复合的方式制成复合棒B，将复合棒A与复合棒B采用卷烟机搓接的方式经水松纸接装而成加热不燃烧卷烟烟支，所述烟支成型方式为“2+2”双二元复合与水松纸接装的组合。
  8. 根据权利要求4所述的干法再造烟叶的应用方法，其特征在于：再造烟叶在皱纸机上成型为发烟段基础棒的过程中，采用喷雾加香或滤嘴棒注香的二次加香技术，将加香成分转移至发烟段基础棒内部，所述的加香成分是由烟用香精、烟用料液、烟草提取物和发烟剂中的一种或几种成分构成；按照再造烟叶的重量为计量基准，所述二次加香的量为1％-15％。
  9. 根据权利要求4所述的干法再造烟叶的应用方法，其特征在于：再造烟叶 在皱纸机上成型为发烟段基础棒的过程中，采用铝箔纸、锡箔纸或含有石墨烯材料的成形纸作为发烟段基础棒成形纸，将再造烟叶丝包裹成为发烟段基础棒。
  10. 加热不燃烧卷烟，其特征在于，根据权利要求4至9中任意一项所述的干法再造烟叶的应用方法制备得到。
PCT/CN2020/113252 2019-11-28 2020-09-03 透气度与紧度可调控的干法再造烟叶及其制备方法与应用 WO2021103732A1 (zh)

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