Preparation method and application of cooling material for heating cigarettes with aroma-enhancing and moisture-preserving functions

Abstract

The invention discloses a preparation method and application of a cooling material with aroma enhancement and moisture retention functions for heating cigarettes. The preparation method comprises the following steps: respectively crushing and defibrating plant fibers and PLA fibers; the two fibers converge into a mixed fiber material and are conveyed to a forming net part; after being conveyed into a forming net cage, the substrate is uniformly settled on a forming net belt through sieve pores of the net cage under negative pressure to form the substrate; finishing the substrate through a hot pressing roller; the hot-pressed substrate is heated by a shaping oven, the PLA fibers are fused and cross-linked in the substrate, and the plant fiber / PLA composite substrate is cured and shaped; and spraying a coating liquid on the cured and shaped substrate, drying in a drying oven, and coiling by a coiling machine to obtain the cooling material for heating the cigarettes. According to the preparation method of the cooling material, a dry papermaking production process is used for reference, the cooling material with good processability is prepared by adding the PLA fibers, and the functions of aroma enhancement and moisture retention can be achieved by applying the coating liquid in the preparation process of the cooling material.

Description

Technical Field

[0001] The invention relates to the technical field of cigarette materials, and in particular to a preparation method and application of a cooling material for heated cigarettes with flavor enhancement and moisture retention functions. Background Art

[0002] Due to the unique heating and smoking method of heated cigarettes, the cigarettes are heated to about 300℃ in the heating device channel to bake out smoke for people to smoke, so it is necessary to consider adding a smoke cooling function section in the cigarette structure design. At present, the design of the cooling section of heated cigarettes mainly focuses on two methods: adding PLA and other materials with heat-absorbing phase change function to the front section of the filter tip to cool down, and using a combined hollow tube with perforated holes to dilute the smoke. However, there is still a lot of room for improvement due to the poor processing resistance of various cooling materials mainly based on PLA, which affect the smoke channel after heat absorption and deformation, and the inability of structural cooling to flavor the cigarettes.

[0003] In view of the poor processing resistance of cooling materials and the easy melting and collapse during the suction process, the use of plant fiber and PLA composite papermaking can effectively improve the problem (there are relevant patents), but the traditional wet papermaking technology has problems such as high equipment investment cost, high energy consumption, and serious environmental pollution. In addition, PLA in the composite material made by wet papermaking technology will cause the paper material structure to be dense during the melt cross-linking process, and the load of aromatic substances is small. The dry papermaking method is environmentally friendly and energy-saving due to its unique preparation process. Since the preparation process does not require the intervention of water, the requirements for the drying process are low, resulting in less loss of aromatic substances during the preparation process. And its structure is loose and porous, it can load more aromatic substances, and has good sensory evaluation.

[0004] However, since the substrate preparation of the dry papermaking method uses a dry papermaking airflow forming process, while obtaining a loose and porous structure, the substrate will also have poor uniformity, high porosity, and poor strength. It is very easy to come into contact with water, which seriously affects its processing performance and limits its scope of application. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a preparation method and application of a cooling material for heated cigarettes with flavor enhancement and moisturizing functions, and to compound PLA cooling material and plant fiber using dry papermaking technology to improve the processing resistance and load capacity of the cooling material and expand the application field of dry papermaking technology.

[0006] The technical problem to be solved by the present invention is achieved through the following technical solutions:

[0007] A method for preparing a cooling material for heated cigarettes with a function of enhancing flavor and retaining moisture, comprising the following steps:

[0008] (1) Fiber raw material defibrination: Plant fiber and PLA fiber are fed into a mechanical defibrator respectively and then crushed and defibrinated to form single fibers;

[0009] (2) Fiber blending: PLA fibers and plant fibers are combined in a pipeline to form a mixed fiber material;

[0010] (3) The mixed fiber material is transported to the forming mesh under the action of positive pressure wind;

[0011] (4) Sheet forming: After the mixed fiber material is transported to the inside of the forming mesh cage, it is evenly deposited on the forming mesh belt through the mesh holes of the mesh cage under the action of negative pressure adsorption to form a uniform sheet;

[0012] (5) Substrate finishing: The formed substrate is passed through a hot pressing roller for substrate finishing;

[0013] (6) Oven curing: After the hot-pressed substrate is heated in a set of shaping ovens, the PLA fibers melt and cross-link in the substrate, curing and shaping the plant fiber / PLA composite substrate;

[0014] (7) Spraying and drying of coating liquid: After the substrate has been cured and shaped, it is sprayed with coating liquid and dried in an oven, and then rolled up by a winder to obtain a cooling material for heated cigarettes with the function of enhancing flavor and retaining moisture.

[0015] Preferably, in step (1), the plant fiber is fluff pulp of various plant fibers, with a fiber length of 0.8 to 2.0 mm; preferably, it is softwood fluff pulp, with a fiber length of 1.2 to 1.8 mm; the PLA fiber has a fiber length of 0.6 to 10.0 mm and a linear density of 0.5 dtex to 6.0 dtex; preferably, the fiber length is 2.0 to 6.0 mm and the linear density is 1.8 to 4.0 dtex.

[0016] Preferably, in step (2), the weight ratio of plant fiber to PLA fiber in the mixed fiber material is 2:8 to 8:2; the preferred ratio is 4:6 to 7:3; in step (4), the substrate is a substrate formed by a molding system formed by a combination of 1 to 3 molding heads, and the formed substrate has a basis weight of 15 g / m2 to 60 g / m 2 between.

[0017] Preferably, in step (5), the hot pressing temperature of the hot pressing roller is 80-160°C, the gap between the hot pressing rollers is 0.05-0.50 mm, and the line pressure is 50-500 kN / m; preferably, the hot pressing temperature is 100-130°C, the gap between the rollers is 0.08-0.20 mm, and the line pressure is 200-400 kN / m; in step (6), the curing temperature of the oven is 160°C-200°C.

[0018] Preferably, in step (7), the coating liquid is a mixed solution formed by one or more components of tobacco powder, herbal plant powder, adhesive, atomizer, humectant, tobacco extract, and water, and is applied by spraying, with a spraying amount of 1 to 10 times the weight of the substrate; or the coating liquid is a flavor and fragrance solution with a special aroma style, and is applied by spraying, with a spraying amount of 0.01 to 0.1 times the weight of the substrate; the oven drying temperature is 40°C to 120°C, and the obtained cooling material for heated cigarettes has a quantitative value of 50g / m 2 ~300g / m 2 , thickness is 0.2mm~0.5mm.

[0019] A cooling material for heated cigarettes with flavor enhancement and moisturizing function prepared according to the above preparation method.

[0020] The invention discloses an application of a cooling material for heated cigarettes with the function of enhancing flavor and retaining moisture in heated cigarettes.

[0021] Preferably, the application is to apply the cooling material to heated cigarettes, and after the cooling material is unrolled, it is longitudinally folded by a toothed roller in a corrugating machine and then rolled up by a filter rod forming machine to prepare a cooling filter rod.

[0022] Preferably, the filling density of the cooling material in the cooling filter rod is 200-300 mg / cm 3 .

[0023] A heated cigarette, comprising the above-mentioned cooling material for heated cigarettes, is prepared by the following method:

[0024] A1. The prepared cooling filter tip rod and a filter tip rod made of acetate fiber tow are combined to obtain a composite tip rod A by using a binary filter tip composite method;

[0025] A2, compounding the smoking section composed of reconstituted tobacco leaves and the hollow filter rod support section by using a binary filter tip to obtain a composite rod B;

[0026] A3, the composite rod A and the composite rod B are connected by a cigarette making machine through tipping paper to form a four-stage heated cigarette; or,

[0027] B1. Compounding the smoking section composed of reconstituted tobacco leaves and the hollow filter rod support section by using a binary filter tip to obtain a composite rod A;

[0028] B2. The prepared cooling filter tip rod and composite rod A are spliced ​​in a cigarette making machine through tipping paper to form a three-stage heating cigarette.

[0029] The above technical solution of the present invention has the following beneficial effects:

[0030] The present application discloses a method for preparing a cooling material for heated cigarettes with a flavoring and moisturizing function and its application. The method draws on the dry papermaking production process and, on the basis of the existing technology, adds PLA fibers to prepare a cooling material with good processing performance. In addition, during the preparation of the cooling material, the coating liquid (materials such as tobacco powder, plant particles, flavors and fragrances, and moisturizing agents) can be applied to achieve the flavoring and moisturizing function. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0032] Figure 1 The invention discloses a process route for preparing a cooling material for heated cigarettes with the function of enhancing flavor and retaining moisture.

[0033] Figure 2 It is a schematic diagram of a four-stage heated cigarette containing cooling materials for heated cigarettes.

[0034] Figure 3 It is a schematic diagram of a three-stage heated cigarette containing cooling materials for heated cigarettes.

[0035] Among them: 1-smoking section, 2-hollow support section, 3-cooling material section, 4-cellulose acetate filter section. DETAILED DESCRIPTION

[0036] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0037] Unless otherwise specified, the reagents used in this application are all commercially available or obtained through commercial channels, or can be prepared by referring to existing chemical methods.

[0038] Example 1

[0039] (I) Preparation method and steps of cooling material:

[0040] (1) Select coniferous wood fluff pulp with an average fiber length of 1.2 mm as the plant fiber raw material.

[0041] (2) PLA fiber with a length of 4.0 mm and a linear density of 3.3 dtex was selected as the raw material for the cooling material.

[0042] (3) The two types of fibers are put into a crusher for defibration and then merged to form a mixed fiber material, and the mixing ratio of plant fiber to PLA fiber is 7:3.

[0043] (4) The mixed fiber material is evenly transported to the forming section of the dry paper machine with two forming heads through positive air, and the mixed fiber material is settled to form a quantitative of 30g / m 2 substrate.

[0044] (5) The substrate is shaped after passing through hot pressing rollers, the gap between the rollers is 0.1 mm, the line pressure is 250 kN / m, and the hot pressing temperature is set to 100°C.

[0045] (6) The hot-pressed substrate enters an oven for heating and shaping, and the oven curing temperature is 165°C.

[0046] (7) After exiting the oven, a layer of coating liquid is evenly sprayed on the cured substrate in a weight ratio of 1:3 between substrate and coating liquid, and then the substrate is dried and rolled up after passing through an oven.

[0047] The coating liquid is a mixture of 60 parts of water, 20 parts of agarwood powder, 10 parts of glycerin and 4 parts of adhesive. The oven drying temperature is 85°C.

[0048] (II) Cooling material index detection:

[0049] Basis weight: 66g / m 2 The average thickness is 0.38mm and the tensile strength is 1.21kN / m. The physical indicators can meet the requirements of cooling material rolling.

[0050] (III) Application method and steps:

[0051] The cooling material prepared by the method is rolled into a cooling section filter rod with a filling density of about 230 mg / cm 3 , and then the composite rod composed of the smoke-generating section and the hollow support section is twisted and spliced ​​to prepare a four-section structure heating cigarette. Figure 2 As shown, the four-stage structure heating cigarette includes a smoking section 1, a hollow support section 2, a cooling material section 3 and a cellulose acetate filter section 4 connected in sequence. Of course, the present application is not limited to this, and can also be made into Figure 3 The three-segment heated cigarette shown (excluding the cellulose acetate filter segment).

[0052] A heating device was used to simulate the smoking of the cigarettes prepared by the method and the control cigarettes made of pure PLA film as the cooling material at 350°C, and the temperature difference before and after the smoke entered and exited the cooling section was measured. The temperature of the cigarettes prepared by the method dropped by about 13°C, and the smoke inlet temperature was about 48°C, which was not significantly different from that of the pure PLA film cooling material.

[0053] Subsequently, a sensory evaluation was conducted. The cigarettes to which the cooling material prepared by this method was added had a mellow aroma, a prominent agarwood style, a natural and harmonious aroma, reduced dryness and irritation, and an improved smoke smoothness. The overall experience was better than that of the comparison samples.

[0054] Example 2

[0055] (I) Preparation method and steps of cooling material:

[0056] (1) Select coniferous wood fluff pulp with an average fiber length of 1.2 mm as the plant fiber raw material.

[0057] (2) PLA fiber with a length of 3.0 mm and a linear density of 2.4 dtex was selected as the raw material for the cooling material.

[0058] (3) The two types of fibers are put into a crusher for defibration and then merged to form a mixed fiber material, and the mixing ratio of plant fiber to PLA fiber is 5:5.

[0059] (4) The mixed fiber material is evenly transported to the forming section of the dry paper machine with two forming heads through positive air, and the mixed fiber material is settled to form a quantitative of 25g / m 2 Substrate

[0060] (5) The substrate is shaped after being passed through hot pressing rollers, the gap between the rollers is 0.1 mm, the line pressure is 250 kN / m, and the hot pressing temperature is set to 110°C.

[0061] (6) The hot-pressed substrate enters an oven for heating and shaping, and the oven curing temperature is 170°C.

[0062] (7) After exiting the oven, a layer of coating liquid is evenly sprayed on the cured substrate in a weight ratio of 1:6.5 between substrate and coating liquid, and then passed through an oven for drying and rolling. The coating liquid is a mixed coating liquid of 78 parts water, 10 parts tobacco powder, 5 parts glycerin, 3 parts tobacco extract, and 2 parts adhesive. The oven drying temperature is 95°C.

[0063] (II) Cooling material index detection:

[0064] Basis weight: 60g / m 2 The average thickness is 0.35mm and the tensile strength is 1.58kN / m. The physical indicators can meet the requirements of cooling material rolling.

[0065] (III) Application method and steps:

[0066] The cooling material prepared by the method is rolled into a cooling section filter rod with a filling density of about 250 mg / cm 3 The four-segment structure heating cigarette is prepared by combining the filter with a composite rod composed of a smoking segment and a hollow support segment.

[0067] A heating device was used to simulate the smoking of the cigarettes prepared by the method and the control cigarettes made of pure PLA film as the cooling material at 350°C, and the temperature difference before and after the smoke entered and exited the cooling section was measured. The temperature of the cigarettes prepared by the method dropped by about 14°C, and the smoke inlet temperature was about 46°C, which was not significantly different from that of the pure PLA film cooling material.

[0068] Subsequently, a sensory evaluation was conducted, and the cigarettes to which the cooling material prepared by this method was added had a rich and strong tobacco aroma, which was natural and harmonious, with reduced dryness and irritation, and improved smoke smoothness. The overall experience was better than that of the comparison samples.

[0069] Example 3

[0070] (I) Preparation method and steps of cooling material:

[0071] (1) Select coniferous wood fluff pulp with an average fiber length of 1.2 mm as the plant fiber raw material.

[0072] (2) PLA fiber with a length of 3.0 mm and a linear density of 4.0 dtex was selected as the raw material for the cooling material.

[0073] (3) The two types of fibers are put into a crusher for defibration and then merged to form a mixed fiber material, and the mixing ratio of plant fiber to PLA fiber is 4:6.

[0074] (4) The mixed fiber material is evenly transported to the forming section of the dry paper machine with two forming heads through positive air, and the mixed fiber material is settled to form a basis weight of 58g / m 2 substrate.

[0075] (5) The substrate is shaped after being passed through hot pressing rollers, the gap between the rollers is 0.18 mm, the line pressure is 250 kN / m, and the hot pressing temperature is set to 110°C.

[0076] (6) The hot-pressed substrate enters an oven for heating and shaping, and the oven curing temperature is 175°C.

[0077] (7) After exiting the oven, a layer of coating liquid is evenly sprayed on the cured substrate in a weight ratio of 1:0.05 between substrate and coating liquid, and then the substrate is dried and rolled up in an oven. The coating liquid contains orange flavor. The oven drying temperature is 40°C.

[0078] (II) Cooling material index detection:

[0079] Basis weight: 60g / m 2 The average thickness is 0.42mm and the tensile strength is 1.72kN / m. The physical indicators can meet the requirements of cooling material rolling.

[0080] (III) Application method and steps:

[0081] The cooling material prepared by the method is rolled into a cooling section filter rod with a filling density of about 200 mg / cm 3 The four-segment structure heating cigarette is prepared by combining the filter with a composite rod composed of a smoking segment and a hollow support segment.

[0082] A heating device was used to simulate the smoking of the cigarettes prepared by the method and the control cigarettes made of pure PLA film as the cooling material at 350°C, and the temperature difference before and after the smoke entered and exited the cooling section was measured. The temperature of the cigarettes prepared by the method dropped by about 15°C, and the smoke inlet temperature was about 45°C, which was not significantly different from that of the pure PLA film cooling material.

[0083] Subsequently, a sensory evaluation was conducted, and sweet orange-flavored heated cigarettes were selected as the base cigarettes. The cooling material prepared by this method was added to the cigarettes. The orange flavor was clear and obvious, the aroma was penetrating and rising, there was no obvious dryness and irritation, the smoke was more moist, the style characteristics before and after smoking were consistent, the aftertaste was clean and comfortable, and the overall experience was better than the comparison sample.

[0084] Although the present invention has been disclosed as above by the embodiments, it is not intended to limit the present invention. Any person skilled in the art may make various choices and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention is limited by the claims and their equivalents.

Claims

1. A method for preparing a cooling material for heated cigarettes with flavor enhancement and moisturizing functions, characterized in that: The following steps are involved: (1) Defibrination of fiber raw materials: Plant fiber and PLA fiber are fed into a mechanical defibrator respectively and then broken and defibrinated into single fibers; (2) Fiber blending: PLA fibers and plant fibers are combined in a pipeline to form a mixed fiber material; (3) The mixed fiber material is transported to the forming mesh under the action of positive pressure wind; (4) Sheet forming: After the mixed fiber material is transported to the inside of the forming mesh cage, it is evenly deposited on the forming mesh belt through the mesh holes of the mesh cage under the action of negative pressure adsorption to form a uniform sheet; (5) Substrate finishing: The formed substrate is passed through a hot pressing roller for substrate finishing; (6) Oven curing: After the hot-pressed substrate is heated in a set of shaping ovens, the PLA fibers melt and cross-link in the substrate, curing and shaping the plant fiber / PLA composite substrate; (7) Spraying and drying of coating liquid: After the substrate has been cured and shaped, it is sprayed with coating liquid and dried in an oven, and then rolled up by a winder to obtain a cooling material for heated cigarettes with the function of enhancing flavor and retaining moisture.

2. The method for preparing the cooling material for heated cigarettes with flavor enhancement and moisturizing function according to claim 1, characterized in that: In step (1), the plant fiber is fluff pulp of various plant fibers, with a fiber length of 0.8 to 2.0 mm; preferably, softwood fluff pulp, with a fiber length of 1.2 to 1.8 mm; the PLA fiber has a fiber length of 0.6 to 10.0 mm and a linear density of 0.5 dtex to 6.0 dtex; preferably, the fiber length is 2.0 to 6.0 mm and the linear density is 1.8 to 4.0 dtex.

3. The method for preparing the cooling material for heated cigarettes with flavor enhancement and moisturizing function according to claim 1, characterized in that: In step (2), the weight ratio of plant fiber to PLA fiber in the mixed fiber material is 2:8 to 8:2; the preferred ratio is 4:6 to 7:3; in step (4), the substrate is a substrate formed by a molding system formed by a combination of 1 to 3 molding heads, and the formed substrate has a basis weight of 15 g / m2 to 60 g / m 2 between.

4. The method for preparing the cooling material for heated cigarettes with flavor enhancement and moisturizing function according to claim 1, characterized in that: In step (5), the hot pressing temperature of the hot pressing roller is 80-160°C, the gap between the hot pressing rollers is 0.05-0.50 mm, and the line pressure is 50-500 kN / m; preferably, the hot pressing temperature is 100-130°C, the gap between the rollers is 0.08-0.20 mm, and the line pressure is 200-400 kN / m; in step (6), the curing temperature of the oven is 160°C-200°C.

5. The method for preparing the cooling material for heated cigarettes with flavor enhancement and moisturizing function according to claim 1, characterized in that: In step (7), the coating liquid is a mixed solution formed by one or more components of tobacco powder, herbal plant powder, adhesive, atomizer, humectant, tobacco extract, and water, and the application method is spraying, and the spraying amount is 1 to 10 times the weight of the substrate; or the coating liquid is a flavor and fragrance solution with a special aroma style, and the application method is spraying, and the spraying amount is 0.01 to 0.1 times the weight of the substrate; the oven drying temperature is 40°C to 120°C, and the obtained cooling material for heated cigarettes has a quantitative value of 50g / m 2 ~300g / m 2 , thickness is 0.2mm~0.5mm.

6. A cooling material for heated cigarettes having flavor enhancement and moisturizing functions, prepared according to the preparation method according to any one of claims 1 to 5.

7. Use of the cooling material for heated cigarettes with the flavor enhancement and moisturizing function according to claim 6 in heated cigarettes.

8. The use according to claim 7, characterized in that: The application is to apply the cooling material to heated cigarettes. After the cooling material is unrolled, it is longitudinally folded by a toothed roller in a corrugating machine and then rolled up by a filter rod forming machine to prepare a cooling filter tip rod.

9. The use according to claim 8, characterized in that: The filling density of the cooling material in the cooling filter tip is 200-300 mg / cm 3 .

10. A heated cigarette, characterized in that: The heating cigarette comprises the cooling material for a heated cigarette according to claim 6, and the heated cigarette is prepared by the following method: A1. The prepared cooling filter tip rod and a filter tip rod made of acetate fiber tow are combined to obtain a composite tip rod A by using a binary filter tip composite method; A2, compounding the smoking section composed of reconstituted tobacco leaves and the hollow filter rod support section by using a binary filter tip to obtain a composite rod B; A3, the composite rod A and the composite rod B are connected by a cigarette making machine through tipping paper to form a four-stage heated cigarette; or, B1. Compounding the smoking section composed of reconstituted tobacco leaves and the hollow filter rod support section by using a binary filter tip to obtain a composite rod A; B2. The prepared cooling filter tip rod and composite rod A are spliced ​​in a cigarette making machine through tipping paper to form a three-stage heating cigarette.

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