Method for reducing crotonaldehyde in cigarette smoke

Abstract

The invention provides a method for reducing crotonaldehyde in cigarette smoke. The method for reducing crotonaldehyde in cigarette smoke comprises the following steps: (1) mixing apocynum venetum extract with a solvent to prepare a first coating liquid; (2) applying the first coating liquid to the tobacco shreds; and (3) manufacturing cigarettes by adopting the tobacco shreds applied with the first coating liquid. The method can effectively reduce the content of crotonaldehyde in the mainstream smoke of the cigarettes, is simple to operate, easy to industrially realize, cheap and easily available in raw materials and low in production cost, the added substances are traditional Chinese medicine extracts, the requirements of food additive substances are met, the crotonaldehyde content in the smoke is reduced, meanwhile, the crotonaldehyde in the smoke can be coordinated with the cigarette smoke, and the aroma quality of the cigarettes is improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of tobacco harm-reducing materials, and particularly relates to a cigarette paper for reducing crotonaldehyde in cigarette smoke and a manufacturing method of the cigarette. BACKGROUND

[0002] Crotonaldehyde has respiratory cilia toxicity and is one of the seven harmful indicators of cigarette mainstream smoke. Reducing the content of crotonaldehyde in mainstream smoke has been a research hotspot in the tobacco industry. At present, carbon materials, metal-organic framework materials and other adsorbents can be added to cigarette filters to effectively reduce the content of crotonaldehyde in mainstream smoke. However, the adsorbents added in the filter rod generally do not have selectivity. While reducing harmful substances such as crotonaldehyde, a large amount of aroma components in cigarette smoke will be adsorbed, reducing the smoking experience of the cigarette.

[0003] Crotonaldehyde contains an aldehyde group in its molecule and can be reduced to a hydroxyl group under certain conditions. Flavonoids are a kind of antioxidant widely studied and have the effect of scavenging various free radicals. The antioxidant activity of flavonoids comes from the phenolic hydroxyl group in its molecular structure. The phenolic hydroxyl group is easy to give active protons and react with oxidatively active substances. Apocynum venetum is a medicinal and edible plant with the functions of reducing blood pressure, antioxidant, relieving phlegm and cough, and strengthening heart and diuresis. Apocynum venetum extract is rich in flavonoids such as hyperoside, isoquercitrin, rutin, quercetin and astragalin.

[0004] Therefore, the present application applies apocynum venetum extract to cigarettes to reduce the content of crotonaldehyde in cigarette smoke through the reaction between flavonoids rich in apocynum venetum extract and crotonaldehyde. SUMMARY

[0005] (1) Technical problem to be solved In view of the above analysis, the present application aims to provide a method of applying apocynum venetum extract to cigarettes, which solves one of the following problems in the prior art: the problem of reducing the smoking experience of cigarettes caused by reducing harmful components in cigarette smoke by using activated carbon and other adsorbent materials.

[0006] (2) Technical scheme In order to achieve the above-mentioned purpose, the present application adopts the following technical scheme: The present application provides a method for reducing crotonaldehyde in cigarette smoke, which comprises: (1) mixing apocynum venetum extract with a solvent to prepare a first coating liquid; (2) applying the first coating liquid to tobacco shreds; and (3) using the tobacco shreds to which the first coating liquid is applied to manufacture cigarettes.

[0007] In the method for reducing crotonaldehyde in cigarette smoke described above, as a preferred embodiment, the method further comprises: (4) mixing the nettle extract with a solvent to prepare a second coating liquid, and applying the second coating liquid to the cigarette paper, wherein the cigarette is manufactured using both the cut tobacco to which the first coating liquid is applied and the cigarette paper to which the second coating liquid is applied in step (3).

[0008] In the method for reducing crotonaldehyde in cigarette smoke described above, as a preferred embodiment, in step (1), the first coating liquid is subjected to heating and cooling, preferably, the temperature of the heating is 80-100°C (such as 81°C, 83°C, 85°C, 87°C, 89°C, 91°C, 93°C, 95°C, 97°C, 99°C), the time of the heating is 15-25 minutes (such as 16 minutes, 17 minutes, 18 minutes, 19 minutes, 20 minutes, 21 minutes, 22 minutes, 23 minutes, 24 minutes), and the temperature after the cooling is 25-35°C (such as 26°C, 27°C, 28°C, 29°C, 30°C, 31°C, 32°C, 33°C, 34°C).

[0009] In the method for reducing crotonaldehyde in cigarette smoke described above, as a preferred embodiment, in step (1), the concentration of the nettle extract in the first coating liquid is 0.01-2.5% (such as 0.02%, 0.04%, 0.06%, 0.08%, 0.1%, 0.3%, 0.5%, 0.7%, 0.9%, 1.1%, 1.3%, 1.5%, 1.7%, 1.9%, 2.1%, 2.3%) by weight based on the total weight of the first coating liquid, preferably, the concentration of the nettle extract in the first coating liquid is 0.02-2.1%, more preferably, the concentration of the nettle extract in the first coating liquid is 0.05-2.0%, and more further preferably, the concentration of the nettle extract in the first coating liquid is 0.1-2.0%.

[0010] In the method for reducing crotonaldehyde in cigarette smoke described above, as a preferred embodiment, in step (4), the second coating liquid is subjected to heating, filtering, and cooling, preferably, the temperature of the heating is 80-100°C (such as 81°C, 83°C, 85°C, 87°C, 89°C, 91°C, 93°C, 95°C, 97°C, 99°C), the time of the heating is 15-25 minutes (such as 16 minutes, 17 minutes, 18 minutes, 19 minutes, 20 minutes, 21 minutes, 22 minutes, 23 minutes, 24 minutes), and the temperature after the cooling is 25-35°C (such as 26°C, 27°C, 28°C, 29°C, 30°C, 31°C, 32°C, 33°C, 34°C).

[0011] In the method for reducing crotonaldehyde in cigarette smoke, as a preferred embodiment, in step (4), the mixing ratio of the Huahuan hemp extract to the solvent in the second coating solution is 0.04-0.5 (such as 0.05, 0.07, 0.09, 0.1, 0.15, 0.2, 0.25, 0.3, 0.35, 0.4, 0.45, 0.48) by weight.

[0012] In the method for reducing crotonaldehyde in cigarette smoke, as a preferred embodiment, the solvent is ethanol; preferably, the concentration of ethanol is 10-99.8% (such as 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 95%); more preferably, the concentration of ethanol is 20-99.5%; still more preferably, the concentration of ethanol is 50-99%; still more preferably, the concentration of ethanol is 70-99%.

[0013] In the method for reducing crotonaldehyde in cigarette smoke, as a preferred embodiment, in step (2), the specific conditions for applying the first coating solution to the cut tobacco are: in the range of 40-60°C (such as: 42°C, 44°C, 46°C, 48°C, 50°C, 52°C, 54°C, 56°C, 58°C), preferably, the method of spraying is used.

[0014] In the method for reducing crotonaldehyde in cigarette smoke, as a preferred embodiment, in step (4), the specific conditions for applying the second coating solution to the cigarette paper are: in the range of 25-35°C (such as: 26°C, 27°C, 28°C, 29°C, 30°C, 31°C, 32°C, 33°C, 34°C), the second coating solution is coated on the cigarette paper, and then hot air drying is performed; preferably, the temperature of the hot air drying is 60-90°C (such as 62°C, 64°C, 66°C, 68°C, 70°C, 72°C, 75°C, 78°C, 81°C, 84°C, 87°C), more preferably, the temperature of the hot air drying is 70°C.

[0015] (Three) beneficial effects Compared with the prior art, the present application has the following beneficial effects: (1) The present application provides a method for applying Huahuan hemp extract in cigarettes, which can effectively reduce the content of crotonaldehyde in the mainstream smoke of cigarettes.

[0016] (2) The method is simple to operate and easy to realize industrialization.

[0017] (3) The raw materials are cheap and easy to obtain, and the production cost is low.

[0018] (4) The added substance is a traditional Chinese medicine extract, which meets the requirements of food additives.

[0019] (5) In addition, the content of crotonaldehyde in the flue gas is reduced, and the flue gas is coordinated with the cigarette smoke, thereby improving the aroma quality of the cigarette.

[0020] In the present application, the above technical solutions can also be combined with each other to realize more preferred combination solutions. Other features and advantages of the present application will be described in the subsequent description, and some advantages will become apparent from the description, or will be understood by implementing the present application. The purpose and other advantages of the present application can be realized and obtained by the contents specifically pointed out in the description and the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments of the application and, together with the description, serve to explain the principles of the application. In the drawings:

[0022] Figure 1 Fourier transform infrared spectra of the cigarette paper applied with different proportions of apocynum venetum extract prepared in the examples. DETAILED DESCRIPTION

[0023] The embodiments of the present application will be described in detail below with reference to the examples, which are only used to illustrate the present application and should not be considered as limiting the scope of the present application. Each example is provided by way of explanation of the present application rather than limiting the present application. It will be apparent to those skilled in the art that modifications and variations can be made in the present application without departing from the scope or spirit of the present application. For example, features shown or described as part of one embodiment can be used in another embodiment to produce yet another embodiment. Therefore, it is intended that the present application include such modifications and variations as fall within the scope of the appended claims and their equivalents.

[0024] The structure and performance of the cigarette paper applied with different proportions of apocynum venetum extract prepared in the examples were analyzed by the following characterization means: Fourier transform infrared spectroscopy: a German Bruker VERTEX 70 infrared spectrometer was used to determine the structure of the sample, and the wavelength range was 4000~400 cm -1 , attenuated total reflection mode test, cumulative scan 32 times, spectral resolution 4 cm -1 . The 1700~400 cm -1 spectral information rich waveband analysis, 1700 cm -1 Single wave number point as baseline for baseline correction, and the post-spectrum was normalized.

[0025] The analysis of crotonaldehyde in the mainstream cigarette smoke of the cigarette applied with apocynum venetum extract refers to the tobacco industry standard TC / T 254—2008.

[0026] Apocynum venetum extract: purchased from Jiangsu Jianjia Pharmaceutical Co., Ltd.

[0027] Tobacco shred: A certain brand of finished tobacco shred from Shanghai Tobacco Group Beijing Cigarette Factory Co., Ltd. was used.

[0028] Cigarette paper: purchased from Minfeng Special Paper Co., Ltd.

[0029] Gravure coater: HT1100 type, purchased from Jiangyin Huitong Packaging Machinery Co., Ltd.

[0030] Linear smoking machine: SM450 type, purchased from Cerulean, UK.

[0031] Example 1 20 kg of 95% (volume percent) alcohol was weighed into a conditioning barrel, and 0.93 kg, 1.85 kg, 3.7 kg, and 7.4 kg of apocynum venetum extract was accurately weighed into the conditioning barrel according to the amount of different designs, and the mixing ratio of the apocynum venetum extract to 95% alcohol was 0.047, 0.093, 0.185, and 0.37 by weight. After steam heating at 90°C for about 20 minutes, the second coating liquid was obtained after filtration and cooling to 25°C. The above four different second coating liquids were used to coat the inner surface of the cigarette paper at 25°C using an offline processing method of a gravure coater, and then hot air drying was performed at 70°C to obtain cigarette papers with different coating amounts, which were named apocynum venetum cigarette paper-1, apocynum venetum cigarette paper-2, apocynum venetum cigarette paper-3, and apocynum venetum cigarette paper-4, respectively.

[0032] Figure 1 The infrared spectra of the cigarette paper samples with different apocynum venetum coating amounts and the apocynum venetum extract. The apocynum venetum extract contains a large amount of sugar compounds and has a very strong hydroxyl stretching vibration absorption signal. Compared with the blank cigarette paper without apocynum venetum extract coating, the intensity of the hydroxyl stretching vibration band of the test sample is significantly enhanced, indicating that the apocynum venetum extract is successfully coated on the cigarette paper. And with the increase of the coating amount of apocynum venetum, the intensity of the band gradually increases, indicating that there is a gradient difference in the coating amount of the apocynum venetum extract on the obtained coated cigarette paper. In addition, the absorption band near 1600 cm -1 is the characteristic absorption band of flavonoids. With the increase of the coating amount of apocynum venetum, the intensity of this absorption band of the cigarette paper sample also gradually increases. This indicates that with the increase of the coating amount, the content of the active ingredient also gradually increases.

[0033] Structural characterization was performed by infrared spectrometer, as shown in Figure 1 For clarity, only the effective information of 1700~400 cm -1 of the infrared spectrum is shown. The blank cigarette paper has absorption bands at 1428 cm -1 and 8248 cm -1The strong absorption peak at 1200~900 cm -1 The infrared absorption signal at 1200~900 cm -1 The absorption signal at 1604 cm -1 The absorption signal at 1604 cm -1 The absorption signal at 1604 cm -1 The absorption signal at 1604 cm

[0034] Example 2 The finished cigarettes were made by using common tobacco and the "Robusta cigarette paper-2", "Robusta cigarette paper-4" and no Robusta cigarette paper in Example 1. The total particulate matter in the mainstream smoke was collected by using a linear smoking machine (SM450, Cerulean, UK). The content of crotonaldehyde in the mainstream smoke was quantitatively analyzed according to the tobacco industry standard YC / T 254. The test results showed that the contents of crotonaldehyde in the mainstream smoke of the blank cigarette paper cigarette sample, the Robusta cigarette paper-2 cigarette sample and the Robusta cigarette paper-4 cigarette sample were 9.30 μg / cig, 9.16 μg / cig and 7.93 μg / cig respectively, wherein cig represents cigarette and μg / cig represents micrograms contained in each cigarette. It can be seen that the application of Robusta to cigarette paper can effectively reduce the content of crotonaldehyde in cigarette smoke, and the more the amount of Robusta applied, the lower the content of crotonaldehyde.

[0035] Example 3 Take 20 kg of 95% (volume percent) alcohol into the conditioning barrel, and accurately take 0.021 kg, 0.205 kg, 0.62 kg and 1.06 kg of apocynum venetum extract according to the different design additions, respectively, and add them into the conditioning barrel. After steam heating at 90℃ for about 20 minutes, cool to 25℃, get the first coating liquid with the content of apocynum venetum extract of 0.1%, 1.0%, 3.0% and 5.0% by weight. At 50℃, the first coating liquid with the content of apocynum venetum extract of 0.1%, 1.0%, 3.0% and 5.0% is applied to the tobacco shreds by spraying method, and the tobacco shreds with apocynum venetum extract are obtained. The finished cigarettes are made by using the blank cigarette paper without apocynum venetum and the tobacco shreds with apocynum venetum. The content of crotonaldehyde in the mainstream smoke of the cigarettes is tested by the same method as that of Example 2. The results show that the contents of crotonaldehyde in the mainstream smoke of the blank cigarette paper and the cigarettes with 0.1%, 1.0%, 3.0% and 5.0% apocynum venetum tobacco shreds are 9.10 μg / cig, 8.74 μg / cig, 8.01 μg / cig and 7.63 μg / cig, respectively. Compared with the blank cigarette paper and the blank tobacco shreds in Example 1, the content of crotonaldehyde in the mainstream smoke is reduced. However, the application of 3% and 5% apocynum venetum tobacco shreds has a negative effect on the sensory smoking of the cigarettes.

[0036] Example 4 The apocynum venetum cigarette paper-2 sample prepared in Example 1 and the tobacco shreds with 1% apocynum venetum prepared in Example 3 are used to make finished cigarettes. The content of crotonaldehyde in the mainstream smoke of the cigarettes is tested by the same method as that of Example 2. The results show that the content of crotonaldehyde in the mainstream smoke of the cigarettes with apocynum venetum applied to both the cigarette paper and the tobacco shreds is only 7.86 μg / cig, which is reduced by 15.5% compared with the sample without apocynum venetum. This result is basically the same as the performance of metal-organic framework porous materials (Food Industry, 2013(3): 243) and higher than the reduction of 9.28% of nano-silica materials on crotonaldehyde (Materials Review, 2011(S2): 44).

[0037] Comparative Example The apocynum venetum extract powder is applied to the filter rod by a filter rod forming machine, and the application amount is set to 10 mg / rod. After obtaining the finished filter rod, the content of the active components of apocynum venetum in the filter rod is monitored by liquid chromatography-mass spectrometry method, and it is found that there is a huge difference in the content of active components between the rods, which indicates that the application stability of apocynum venetum extract is very poor, and the industrial implementation capability cannot meet the demand.

Claims

1. A method for reducing crotonaldehyde in cigarette smoke, characterized in that, include: (1) Mix the Apocynum venetum extract with a solvent to prepare the first coating solution; (2) Apply the first coating liquid to the tobacco; as well as (3) Cigarettes are made using the tobacco shreds to which the first coating liquid has been applied.

2. The method according to claim 1, characterized in that, Also includes: (4) Mix the Apocynum venetum extract with a solvent to prepare a second coating solution, and apply the second coating solution to cigarette paper. In step (3), cigarettes are made using the tobacco shreds coated with the first coating liquid and the cigarette paper coated with the second coating liquid.

3. The method according to claim 1 or 2, characterized in that, In step (1), the first coating liquid is subjected to the following treatment: heating and cooling. Preferably, the heating temperature is 80~100℃, the heating time is 15~25 minutes, and the cooling temperature is 25~35℃.

4. The method according to claim 1 or 2, characterized in that, In step (1), the concentration of Apocynum venetum extract in the first coating liquid is 0.01-2.5% by weight, based on the total weight of the first coating liquid. Preferably, the concentration of Apocynum venetum extract in the first coating liquid is 0.02-2.1%. More preferably, the concentration of Apocynum venetum extract in the first coating liquid is 0.05-2.0%. Even more preferably, the concentration of Apocynum venetum extract in the first coating liquid is 0.1-2.0%.

5. The method according to claim 2, characterized in that, In step (4), the second coating liquid is subjected to the following treatments: heating, filtering and cooling. Preferably, the heating temperature is 80~100℃, the heating time is 15~25 minutes, and the cooling temperature is 25~35℃.

6. The method according to claim 2, characterized in that, In step (4), the mixing ratio of the Apocynum venetum extract to the solvent in the second coating liquid is 0.04 to 0.5 by weight.

7. The method according to claim 1 or 2, characterized in that, The solvent is ethanol; preferably, the concentration of ethanol is 10-99.8%; more preferably, the concentration of ethanol is 20-99.5%; even more preferably, the concentration of ethanol is 50-99%; even more preferably, the concentration of ethanol is 70-99%.

8. The method according to claim 1 or 2, characterized in that, In step (2), the specific conditions for applying the first coating liquid to the tobacco are: within the range of 40~60°C, preferably by spraying.

9. The method according to claim 2, characterized in that, In step (4), the specific conditions for applying the second coating liquid to the cigarette paper are as follows: the second coating liquid is applied to the cigarette paper in a temperature range of 25~35℃, and then hot air drying is performed; preferably, the hot air drying temperature is 60~90℃, and more preferably, the hot air drying temperature is 70℃.

Images