Carrier gel microsphere, cigarette filter tip liquorice moisture-retaining aroma-enhancing bead and preparation method

文档序号：836582 发布日期：2021-04-02 浏览：11次中文

阅读说明：本技术 载体凝胶微球、香烟滤嘴甘草保润增香珠及制备方法 (Carrier gel microsphere, cigarette filter tip liquorice moisture-retaining aroma-enhancing bead and preparation method ) 是由刘泽宇魏元刚杨永安葛继武朱网云孙佳琪于 2020-12-31 设计创作，主要内容包括：本发明公开了一种载体凝胶微球、香烟滤嘴甘草保润增香珠及制备方法。本发明所述的一种载体凝胶微球,通过将多糖溶液滴入钙离子溶液中制备；所述多糖溶液包含以下质量百分比组分：0.5-8％多糖类成分、1-25％助剂；所述钙离子溶液为质量百分比为0.18-1.8％的钙离子水溶液。本发明所述的一种香烟滤嘴甘草保润增香珠,通过将甘草香味剂、甘草甜味剂以及保湿剂吸附于载体凝胶微球中制备；所述甘草香味剂占载体凝胶微球质量的0.5-8％,所述甘草甜味剂占载体凝胶微球质量的0.05-0.6％,所述保湿剂占载体凝胶微球质量的5-52％。本发明通过水凝胶,解决了现有技术的添香以固体形式添加于香烟中,烟气保润作用相比含液型添加剂弱的缺陷,并通过添加剂的添加,保持烟气湿润协调,提升烟气棉柔舒适感。(The invention discloses a carrier gel microsphere, a cigarette filter tip liquorice moisture-retaining aroma-enhancing bead and a preparation method thereof. The carrier gel microsphere is prepared by dripping polysaccharide solution into calcium ion solution; the polysaccharide solution comprises the following components in percentage by mass: 0.5-8% of polysaccharide component and 1-25% of auxiliary agent; the calcium ion solution is 0.18-1.8% of calcium ion water solution in percentage by mass. The liquorice moisture-retaining and aroma-enhancing bead for the cigarette filter is prepared by adsorbing a liquorice flavoring agent, a liquorice sweetening agent and a humectant in carrier gel microspheres; the liquorice flavoring agent accounts for 0.5-8% of the mass of the carrier gel microspheres, the liquorice sweetening agent accounts for 0.05-0.6% of the mass of the carrier gel microspheres, and the humectant accounts for 5-52% of the mass of the carrier gel microspheres. The invention overcomes the defect that the moistening effect of the smoke is weaker than that of a liquid-containing additive when the flavoring is added into cigarettes in a solid form in the prior art through the hydrogel, keeps the moisture coordination of the smoke through the addition of the additive, and improves the soft and comfortable feeling of the smoke.)

1. The carrier gel microsphere is characterized in that the carrier gel microsphere is prepared by dripping polysaccharide solution into calcium ion solution; the polysaccharide solution comprises the following components in percentage by mass: 0.5-8% of polysaccharide component and 1-25% of auxiliary agent; the calcium ion solution is 0.18-1.8% of calcium ion water solution in percentage by mass.

2. The carrier gel microsphere of claim 1, wherein the polysaccharide component is selected from one or more of sodium alginate, carrageenan, curdlan, gellan gum and xanthan gum; the auxiliary agent is selected from one or more of chitosan, gelatin, polyvinyl alcohol, polyethylene glycol, polyvinylpyrrolidone, propylene glycol and glycerol; the calcium ion solution is selected from one or more combined solutions of inorganic calcium and organic calcium.

3. The carrier gel microspheres of claim 1, wherein the polysaccharide solution comprises the following components in percentage by mass: 1-5% of polysaccharide component and 5-15% of auxiliary agent; the calcium ion solution is 0.36-1.08% by mass of calcium ion aqueous solution.

4. The carrier gel microsphere of claim 1, prepared by the method comprising: preparing a polysaccharide solution and a calcium ion solution, standing for defoaming, and cooling to room temperature; dripping polysaccharide solution into the calcium ion solution under stirring, wherein the stirring speed of the calcium ion solution is 50-500rpm, the weight of the polysaccharide solution drops is controlled at 30-70 mg/drop, the distance between a dripper device and the liquid level of the calcium ion solution is controlled at 5-30cm, and taking out the gel microspheres after the polysaccharide solution is dripped into the calcium ion solution and reacts for 0.5-24 h.

5. The carrier gel microsphere of claim 3, wherein the stirring speed of the calcium ion solution is 100-200rpm, the weight of the polysaccharide solution drops is controlled to be 45-55 mg/drop, the distance between the dripper device and the calcium ion liquid surface is controlled to be 8-15cm, and the gel microsphere is taken out after the polysaccharide solution is dripped into the calcium ion solution and reacts for 1-10 h.

6. The moisture-retaining and aroma-enhancing liquorice bead for the cigarette filter is characterized by comprising the following components: the carrier gel microspheres of claim 1, licorice flavoring, licorice sweetener, and humectant; the liquorice flavoring agent accounts for 0.5-8% of the mass of the carrier gel microspheres, the liquorice sweetening agent accounts for 0.05-0.6% of the mass of the carrier gel microspheres, and the humectant accounts for 5-52% of the mass of the carrier gel microspheres.

7. The licorice moisturizing and flavoring bead as claimed in claim 6, wherein the licorice flavoring agent is prepared by the following method: adding 40-95% ethanol water solution 6-15 times of Glycyrrhrizae radix, reflux extracting at 70-90 deg.C for 1-3 hr for 2-4 times, filtering, mixing filtrates, concentrating, and drying to obtain extract; dissolving the extract with ethyl acetate 4-10 times the weight of the extract and water 4-10 times the weight of the extract, extracting for 1-3 times, separating ethyl acetate layer, mixing, concentrating, and drying to obtain Glycyrrhrizae radix flavoring agent.

8. The cigarette filter tip licorice moisturizing and flavoring bead as claimed in claim 6, wherein the licorice sweetener is glycyrrhetate selected from one or more of ammonium glycyrrhetate, potassium glycyrrhetate, sodium glycyrrhetate and glycyrrhetinic acid monoglucuronide.

9. The licorice moisturizing and flavoring bead as claimed in claim 6, wherein the humectant is selected from one or more of 1, 2-propylene glycol, glycerin, 1, 3-butylene glycol, polyethylene glycol, xylitol, sorbitol and maltitol.

10. The preparation method of the licorice moisture-retaining and aroma-enhancing bead for the cigarette filter according to claim 6, characterized by comprising the following steps:

(1) preparing carrier microspheres: preparing a polysaccharide solution and a calcium ion solution, standing for defoaming, and cooling to room temperature; dropwise adding the polysaccharide solution into the stirring calcium ion solution, wherein the stirring speed of the calcium ion solution is 50-500rpm, the weight of the polysaccharide solution drops is controlled to be 30-70 mg/drop, the distance between a dripper device and the liquid level of the calcium ion solution is controlled to be 5-30cm, and taking out the gel microspheres after the polysaccharide solution is dropwise added into the calcium ion solution and reacts for 0.5-24 h;

(2) preparing a liquorice flavoring agent: adding 40-95% ethanol water solution 6-15 times of Glycyrrhrizae radix, reflux extracting at 70-90 deg.C for 1-3 hr for 2-4 times, filtering, mixing filtrates, concentrating, and drying to obtain extract; dissolving the extract with ethyl acetate 4-10 times the weight of the extract and water 4-10 times the weight of the extract, extracting for 1-3 times, separating ethyl acetate layer, mixing, concentrating, and drying to obtain Glycyrrhrizae radix flavoring agent;

(3) preparing Glycyrrhrizae radix flavoring agent, Glycyrrhrizae radix sweetener, and humectant into water solution, mixing with carrier gel microsphere, placing in rotary evaporator, drying at 40-60 deg.C for 1-5 hr until no liquid adheres to the microsphere surface.

Technical Field

The invention relates to a cigarette filter tip additive material, in particular to a carrier gel microsphere, a cigarette filter tip liquorice moisture-retaining aroma-enhancing bead and a preparation method thereof.

Background

In the cigarette production process, the tobacco shred flavoring process has important significance for forming cigarette style. The traditional tobacco shred flavoring process is to spray surface aroma on the surface of tobacco shreds in a flavoring roller in a spraying mode. The surface aroma of the flavoring mode is only attached to the surface of the cut tobacco and is difficult to permeate into the cut tobacco, so the surface aroma loss is easily caused. Moreover, the additives are added into the tobacco and then participate in combustion or contact with the smoke, and cracking, oxidation or addition reactions and the like can occur in the process, so that the chemical composition and the biological properties of the smoke are influenced.

At present, the three-dimensional flavor blending technology in the tobacco industry comprises cigarette blasting beads, microcapsules, nanoparticles and the like, wherein the cigarette blasting beads are wide in audience, but oil needs to be added into the cigarette blasting beads to serve as a solvent, so that tar and waste gas are potentially generated, and the cigarette blasting beads are limited to be mainly used for wrapping essence and spices such as ginseng, mint and the like with strong fragrance due to the existence of trace unpleasant odor. In addition, the adoption of stereo flavoring modes such as microcapsules, nanoparticles and the like inevitably causes the worry of consumers about safe smoking of the fine additives. At present, solid flavor bead particles are adopted to realize three-dimensional flavor blending of tobacco in the market, however, the solid flavor bead particles have the defects of low particle strength and large deformation rate to cause slow release stability reduction, and the flavor blending rate is still to be improved; and the tobacco and the smoke contain harmful substances, which are easy to cause symptoms such as throat discomfort, cough and excessive phlegm. How to meet the physiological requirements of smokers and reduce the harm of smoking to human health to the maximum extent, even has certain environmental protection and health care functions, is a problem to be solved urgently in the tobacco industry at present.

The liquorice is widely applied to the aspects of medicines, foods, cosmetics, tobacco, animal husbandry and the like, has good functions of moistening lung, relieving cough and eliminating phlegm, has sweet herbal fragrance, strong fragrance, lasting fragrance and soft aftertaste, and has good effects of enriching the fragrance of cigarettes, improving the taste of smoking, increasing the sweet feeling and covering up miscellaneous gas when being used for cigarettes.

The prior art discloses coating forming paper for functional plant particle cigarettes and a preparation method thereof, and the method comprises the step of spraying slurry consisting of 100-150-mesh functional plant particle powder, adhesive, humectant and water which are formed by different component proportions on the forming paper by utilizing compressed air. The functional plant particle cigarette coating forming paper is safe and non-toxic, can improve the sensory quality of cigarettes in the smoking process, shows brand style characteristics more, gives richer product connotation to the cigarette filter stick forming paper, and has an appearance anti-counterfeiting function.

The second prior art discloses a natural plant composite particle for sweetening and moisturizing, a preparation method and application thereof, the composite particle is prepared by crushing, cell wall breaking and screening raw materials of poria cocos, momordica grosvenori, angelica sinensis, florists chrysanthemum, honeysuckle, tobacco flowers, liquorice and pinellia ternate respectively to obtain wall breaking powder, adding auxiliary materials to granulate the wall breaking powder to obtain composite particles of 30-60 meshes, and the adopted plant raw materials for sweetening and moisturizing have the characteristics of being natural, harmless, free of addition, pollution-free, safe and reliable, have the effects of increasing aroma, sterilizing, resisting oxidation and the like, do not participate in combustion of the plant raw materials, avoid generation of other harmful substances, can retain effective active ingredients of plants when added into a cigarette filter, and the technology takes the natural plant composite particles as filter filler and has the risk of particle inhalation.

The third prior art discloses a preparation method of tobacco flavor beads with a slow release function, which comprises the following steps of putting 10-20 parts by weight of konjac flour, 10-15 parts by weight of white carbon black, 10-15 parts by weight of licorice powder, 10-20 parts by weight of chitin and 30-40 parts by weight of distilled water into a pair-roller dry-method granulator for one-step forming granulation to obtain dried round dry beads with porous structures on the surfaces and uniform sizes, wherein the diameter range of the dry round dry beads is 2.5-2.9 mm; and then, uniformly mixing the fixed-fragrance humectant with the dried beads, and air-drying to obtain a finished product. According to the technology, raw material components and proportion of the dry beads are optimized, and a proper amount of konjac powder, white carbon black and chitin are compounded, so that the dry beads are endowed with good surface porous structure characteristics, and have the advantages of high strength, high toughness, fire resistance, high temperature resistance and excellent post-processing fusion, and therefore the dry beads have excellent stability and a slow-release effect after being attached with fragrance.

Disclosure of Invention

The purpose of the invention is as follows: in order to make up the defects of the prior art, the invention provides the moisture-retaining aroma-enhancing liquorice bead for the cigarette filter and the preparation method thereof.

The technical scheme is as follows: the carrier gel microsphere is prepared by dripping polysaccharide solution into calcium ion solution; the polysaccharide solution comprises the following components in percentage by mass: 0.5-8% of polysaccharide component and 1-25% of auxiliary agent; the calcium ion solution is 0.18-1.8% of calcium ion water solution in percentage by mass.

The polysaccharide component is selected from one or more of sodium alginate, carrageenan, curdlan, gellan gum and xanthan gum; the auxiliary agent is selected from one or more of chitosan, gelatin, polyvinyl alcohol, polyethylene glycol, polyvinylpyrrolidone, propylene glycol and glycerol; the calcium ion solution is selected from one or more combined solutions of inorganic calcium and organic calcium.

Preferably, the polysaccharide solution comprises: 1-2% of sodium alginate, 0.2-0.5% of carrageenan, 0.2-0.5% of curdlan, 0.2-0.5% of gellan gum, 0.1-0.5% of chitosan, 0.1-0.3% of gelatin, 0.1-0.5% of polyvinyl alcohol and 5-10% of polyethylene glycol 2000.

Preferably, the polysaccharide solution comprises the following components in percentage by mass: 1-5% of polysaccharide component and 5-15% of auxiliary agent; the calcium ion solution is 0.36-1.08% by mass of calcium ion aqueous solution.

Preferably, the calcium ions are from one or more of calcium chloride, calcium acetate and calcium lactate;

the invention also provides a preparation method of the carrier gel microsphere, which comprises the following steps: preparing a polysaccharide solution and a calcium ion solution, standing for defoaming, and cooling to room temperature; dripping polysaccharide solution into the calcium ion solution under stirring, wherein the stirring speed of the calcium ion solution is 50-500rpm, the weight of the polysaccharide solution drops is controlled at 30-70 mg/drop, the distance between a dripper device and the liquid level of the calcium ion solution is controlled at 5-30cm, and taking out the gel microspheres after the polysaccharide solution is dripped into the calcium ion solution and reacts for 0.5-24 h. The particle size of the carrier gel microspheres is 2-6 mm.

Preferably, the stirring speed of the calcium ion solution is 100-200rpm, the weight of the polysaccharide solution drops is controlled to be 45-55 mg/drop, the distance between the dripper device and the calcium ion liquid surface is controlled to be 8-15cm, and the gel microspheres are taken out after the polysaccharide solution is dripped into the calcium ion solution and reacts for 1-10 h. The particle size of the carrier gel microspheres is 3-4 mm.

The invention relates to a moisture-retaining aroma-enhancing bead for licorice roots of a cigarette filter, which comprises the following components: the carrier gel microspheres, the liquorice flavoring agent, the liquorice sweetening agent and the humectant; the liquorice flavoring agent accounts for 0.5-8% of the mass of the carrier gel microspheres, the liquorice sweetening agent accounts for 0.05-0.6% of the mass of the carrier gel microspheres, and the humectant accounts for 5-52% of the mass of the carrier gel microspheres.

The moisture-retaining aroma-enhancing licorice root bead for the cigarette filter tip, which is prepared by the invention, has the characteristic style of covering up miscellaneous gas, keeping moisture and coordination of smoke, improving the cotton softness and comfort of the smoke and highlighting the sweet and moist feeling of the licorice root.

Wherein, the liquorice flavoring agent is mainly used for increasing the unique fragrance of the liquorice, and the liquorice sweetening agent is mainly used for increasing the sweet feeling. The carrier gel microsphere humectant is mainly used for adsorbing miscellaneous gas and keeping the humidity of smoke to be coordinated.

The licorice sweetener is glycyrrhetate, and the glycyrrhetate is one or more of glycyrrhetate ammonium salt, glycyrrhetate potassium salt, glycyrrhetate sodium salt and glycyrrhetinic acid monoglucuronide, is a main sweet component in licorice and has higher sweetness.

The humectant is selected from one or more of 1, 2-propylene glycol, glycerol, 1, 3-butylene glycol, polyethylene glycol, xylitol, sorbitol and maltitol.

Preferably, the licorice sweetener is glycyrrhetinic acid monoglucuronide.

Preferably, the licorice flavor is 3-6% of the mass of the carrier microsphere, the licorice sweetener is 0.2-0.4% of the mass of the carrier microsphere, and the humectant is selected from one or more of 1, 2 propylene glycol, glycerol, xylitol and sorbitol.

Preferably, the humectant consists of 1, 2 propylene glycol, glycerin, xylitol, and sorbitol.

Preferably, the humectant: calculated by the mass of the carrier microspheres, the material contains 2-20% of 1, 2-propylene glycol, 2-20% of glycerol, 0.5-6% of xylitol and 0.5-6% of sorbitol. More preferably, the licorice flavor agent accounts for 4-5% of the mass of the carrier microsphere, the licorice sweetener accounts for 0.25-0.35% of the mass of the carrier microsphere, and the humectant accounts for 13-37% of the mass of the carrier microsphere.

Preferably, the humectant: calculated by the mass of the carrier microspheres, the material contains 5-15% of 1, 2-propylene glycol, 5-15% of glycerol, 1-3% of xylitol and 2-4% of sorbitol.

The invention also provides a preparation method of the liquorice flavoring agent, which comprises the following steps: adding 40-95% ethanol water solution 6-15 times of Glycyrrhrizae radix, reflux extracting at 70-90 deg.C for 1-3 hr for 2-4 times, filtering, mixing filtrates, concentrating, and drying to obtain extract; dissolving the extract with ethyl acetate 4-10 times the weight of the extract and water 4-10 times the weight of the extract, extracting for 1-3 times, separating ethyl acetate layer, mixing, concentrating, and drying to obtain Glycyrrhrizae radix flavoring agent.

Preferably, the licorice flavoring agent can be prepared by the following method: adding 80% ethanol water solution 10 times of Glycyrrhrizae radix weight, extracting at 85 deg.C for 2 times, each for 2 hr to obtain extract; dissolving ethyl acetate 5 times the weight of the extract and water 5 times the weight of the extract in water, and extracting for 1 time; the water layer after extraction contains more glycyrrhizic acid components, and can be used for preparing Glycyrrhrizae radix sweetener.

The invention relates to a preparation method of a moisture-retaining and aroma-enhancing bead for liquorice of a cigarette filter, which comprises the following steps:

(1) preparing carrier microspheres: preparing a solution containing polysaccharide and a calcium ion solution, standing for defoaming, and cooling to room temperature; dropwise adding the polysaccharide solution into the stirring calcium ion solution, wherein the stirring speed of the calcium ion solution is 50-500rpm, the weight of the polysaccharide solution drops is controlled to be 30-70 mg/drop, the distance between a dripper device and the liquid level of the calcium ion solution is controlled to be 5-30cm, and taking out the gel microspheres after the polysaccharide solution is dropwise added into the calcium ion solution and reacts for 0.5-24 h;

The grain diameter of the moisture-retaining aroma-enhancing bead of the licorice root of the cigarette filter prepared by the method is 1.5-5 mm.

Preferably, the mass ratio of the aqueous solution to the microspheres should be 1: 1, drying the microspheres for 2-4h at 45-55 ℃ after mixing, wherein the grain diameter of the obtained liquorice moisture-retaining aroma-enhancing beads is 2.8-3.2 mm.

The rotary drying device includes, but is not limited to, a rotary evaporator, a coating pan, a drum dryer, and the like.

In the present invention, "%" is a mass percentage unless otherwise specified.

Has the advantages that: (1) the invention overcomes the defect that the smoke moisture retention function of the flavoring added in the prior art is weaker than that of the liquid-containing additive when the flavoring is added into cigarettes in a solid form by preparing the carrier gel; (2) the prepared moisture-retaining aroma-enhancing liquorice beads for the cigarette filter can be added into the cigarette filter, can be crushed like popping beads, has interestingness, increases the contact area with smoke, reduces and covers miscellaneous gas, keeps the moisture and coordination of the smoke, improves the cotton soft and comfortable feeling of the smoke, and can increase the characteristic style of the sweet and fragrant liquorice; (3) the invention is easy to be added into cigarette filter tips, the process is easy to realize mass production, and the surface aroma loss and the generation of miscellaneous gas and peculiar smell in the tobacco shred moistening and flavoring link can be avoided.

Detailed Description

The invention will be further elucidated with reference to the following specific examples.

Firstly, preparation of raw materials

(1) Preparation of carrier gel microspheres:

polysaccharide solution is used as solution A, and calcium ion solution is used as solution B; preparing A, B two parts of solution, standing for defoaming, and cooling to room temperature; dropwise adding the solution A into the stirring solution B, wherein the stirring speed of the solution B is 150rpm, the weight of the solution A is controlled to be 50-52 mg/drop, the distance between a dripper device and the solution surface of the solution B is controlled to be within 8-12cm, and taking out the gel microspheres after the solution A is dripped into the solution B to react for 2-4 h; the particle size of the carrier gel microspheres is 3-4 mm.

Optimizing factors: (1) screening the polysaccharide solution according to the proportion of each component according to the microsphere forming speed, the roundness and the hardness; (2) the concentration and the source component of the calcium ion solution are selected according to the microsphere forming speed;

table 1 is a partial data of the optimization experiment:

TABLE 1 influence of polysaccharide solution Components on the behavior of microspheres

TABLE 2 influence of calcium ions on the properties of the microspheres

As can be seen from tables 1 and 2, sodium alginate has the best molding effect in calcium ion solution compared with other polysaccharides, calcium chloride is the calcium source for the fastest molding, and the microspheres prepared by dripping the formula a1 polysaccharide solution into the formula B1 calcium ion solution have the best properties, so that the carrier gel microspheres prepared by the process are applied to the following examples.

TABLE 3 raw material specification parameters associated with microspheres

Name of raw materials	Specification parameters	Relative molecular weight
			Sodium alginate	The powder is prepared into a food grade,medium viscosity 150-400mpa.s	1×10⁴～6×10⁵
Carrageenan	Food grade, type K	-
			Gellan gum	Food grade, low acyl	4×10⁵～6×10⁵
Chitosan	Food grade, the deacetylation degree is more than or equal to 90 percent	-
			Gelatin	Food grade, 120 jelly strength	-

In addition, the polyethylene glycol has marked molecular weight, and the other raw materials are common food-grade raw materials without special parameters;

(2) preparation of licorice flavoring agent

Adding an ethanol water solution with the weight ratio of 10 times that of the liquorice into the liquorice, wherein the mass fraction of the ethanol water solution is 80%, performing reflux extraction for 2 times at the temperature of 85 ℃, each time for 2 hours, filtering, combining filtrates, concentrating and drying to obtain an extract; and dissolving the extract by using ethyl acetate and water in an amount which is 5 times of the weight of the extract, extracting for 1 time, separating an ethyl acetate layer, combining, concentrating and drying to obtain the liquorice flavoring agent.

(3) The licorice sweeteners used in the examples were all glycyrrhetinic acid monoglucuronide, sourced from yillier canary biotechnology limited.

Second, sample preparation

Preparing the moisture-retaining aroma-enhancing liquorice beads for the cigarette filter:

preparing an aqueous solution of liquorice flavoring agent, liquorice sweetening agent, 1, 2-propylene glycol, glycerol, xylitol and sorbitol (the amount is the same as that in example 1), and mixing the aqueous solution of the liquorice flavoring agent, the liquorice sweetening agent, the 1, 2-propylene glycol, the glycerol, the xylitol and the sorbitol with carrier gel microspheres in a mass ratio of 1: 1, placing the mixture in a rotary evaporator, drying the mixture for 2 to 4 hours at the temperature of between 45 and 55 ℃, wherein no liquid is attached to the surface of the microsphere, and the grain diameter of the liquorice moisture-retaining aroma-enhancing bead of the cigarette filter is 2.8 to 3.2 mm.

In the preparation method, the mass ratio of the aqueous solution to the microspheres is determined by the particle size and hardness change of the final moisture-retaining aroma-enhancing beads:

TABLE 4 influence of mass ratio of humectant aqueous solution to microspheres

As can be seen from Table 4, when the mass ratio of the aqueous solution to the microspheres is less than 1: 1, the change of the microsphere property is large, but when the mass ratio is more than or equal to 1: after 1, the change of the microsphere property is small, and the drying time is longer as the solution amount is larger, so that the addition is not beneficial, and the mass ratio of 1: 1.

example 1: preparation of moisture-retaining aroma-enhancing liquorice beads for cigarette filter