A cigarette filter based on konjac material and preparation method thereof

Abstract

The invention discloses a cigarette filter based on konjac material and a preparation method thereof, wherein the cigarette filter comprises the following raw materials in parts by weight: 20-50 parts of konjac flour, 1-5 parts of adsorbent, 0.1-1 parts of surfactant, 1-2 parts of composite foaming agent, 5-10 parts of gelling agent, 10-30 parts of auxiliary agent, and 0.5-2 parts of additive; the preparation method is to be molded by using positive pressure ventilation after mixing each raw material into a mold containing multiple organic glass tubes, and the cigarette filter is prepared by boiling, freezing, demoulding, dehydration, freeze drying, etc. The cigarette filter prepared by the present invention can effectively filter harmful substances such as tar, and has biodegradability.

Description

Technical Field

[0001] The invention belongs to the technical field of foaming materials, and particularly relates to a cigarette filter tip based on konjac material and a preparation method thereof. Background Art

[0002] The filter tip refers to the upper part of the cigarette. It is a tool specially designed for smokers. It can reduce the smoke, tar and suspended particles produced during combustion. At present, the materials of cigarette filter tips are mainly divided into two categories: one is acetate fiber; the other is polypropylene fiber. Acetate fiber is cellulose acetate. It is a man-made fiber obtained by esterification of plant cellulose and acetic acid. The filter tip made of it has excellent comprehensive properties such as good taste absorption effect, high efficiency of intercepting mainstream smoke tar, and firm texture. It is suitable for use in medium and high-end cigarettes. However, there are disadvantages such as three wastes pollution, high production cost, and difficulty in biodegradation after use in the production process of acetate fiber. At present, my country's acetate fiber mainly relies on imports. Polypropylene fiber raw materials are cheap, but the spinnability is poor. The filter tip made of it has poor comprehensive performance and is only used in low-end cigarettes. It cannot be biodegraded, causing pollution to the environment.

[0003] Chinese patent CN103584281B discloses a cigarette filter and a preparation method thereof, which utilizes polysaccharide, adsorbent, plasticizer, plant protein, fermentation bacteria and solvent to mix and ferment, and then extrude and mold to obtain a cigarette filter, which can reduce the tar by 5% compared with traditional acetate fiber, and has the advantages of uniform internal pores, low density, strong ability to intercept tar and toxic and harmful substances, and rapid biodegradability; wherein the polysaccharide is any combination of one or more of fermentable starch, konjac glucomannan, carrageenan, sodium alginate, pectin, cellulose and modified cellulose thereof.

[0004] Chinese patent CN102423132B discloses a plant polysaccharide cigarette filter and a preparation method thereof, wherein plant polysaccharides, starch, adsorbent, plasticizer, emulsifier, waterproof agent, and plant protein are configured in a certain proportion, and after being formed in a mold, the cigarette filter is obtained by pre-freezing, freeze drying, and demolding; the cigarette filter has the advantages of wide raw material sources, low cost, no three wastes, and can reduce nicotine content by 40.2-84.1%, tar by 26-72.1%, and nicotine by 20-39.2%, and waste after use is biodegradable, etc. The plant polysaccharide is konjac polysaccharide, and the starch is potato starch.

[0005] Chinese patent CN116725226A discloses a biodegradable polysaccharide-based fiber filter and a preparation method thereof. The raw materials are konjac glucomannan, starch, wood pulp fiber, agar, polyvinyl alcohol, glycerol and functional substances. The filter has the characteristics of being degradable by natural microorganisms and not producing toxic and harmful substances. At the same time, the tar in the smoke of traditional cigarettes can be reduced by 5-25%, and the tar in the smoke has a good adsorption effect, thereby reducing the harm caused by the tar in the smoke.

[0006] However, the raw materials of existing cigarette filters are relatively complex and contain starch and plant protein, which will increase costs and increase the environmental burden. In addition, starch and plant protein may produce harmful substances after denaturation at high temperatures, which generally cause potential safety risks after being inhaled by the human body. Therefore, it is necessary to produce a cigarette filter with lower risks and lighter environmental burden. Summary of the invention

[0007] In view of the above technical problems, the present invention provides a cigarette filter based on konjac material and a preparation method thereof. Konjac powder is used as a raw material and mixed with an adsorbent, a surfactant and a foaming agent to prepare a cigarette filter. The cigarette filter can absorb harmful substances in cigarettes and is degradable, thereby reducing the environmental burden.

[0008] In order to achieve the above object, the present invention provides a cigarette filter based on konjac material, which comprises the following raw materials in parts by weight: 20-50 parts of konjac flour, 1-5 parts of adsorbent, 0.1-1 parts of surfactant, 1-2 parts of composite foaming agent, 5-10 parts of gelling agent, 10-30 parts of auxiliary agent and 0.5-2 parts of additive.

[0009] Preferably, the adsorbent is bamboo charcoal powder or activated carbon.

[0010] Preferably, the glucomannan content of the konjac flour is ≥85%, and the viscosity is 30000-35000 mPa·s.

[0011] Preferably, the surfactant is a nonionic surfactant; the additive is a plant extract; the gelling agent is any one of sodium carbonate, sodium bicarbonate, and calcium hydroxide; and the auxiliary agent is anhydrous ethanol.

[0012] Further preferably, the nonionic surfactant is polysorbate 20; and the plant extract is any one of mint, rosemary, and pine.

[0013] Preferably, the composite foaming agent is formed by mixing a foaming agent and a foaming material in a mass ratio of 1:5.

[0014] Preferably, the foaming agent is azodicarbonamide; and the foaming material is sodium lauroyl glutamate.

[0015] The present invention also provides a method for preparing a cigarette filter based on konjac material, comprising the following steps: (1) Compounding a foaming agent and a foaming material to obtain a composite foaming agent; (2) adding a surfactant, a foaming agent, an auxiliary agent and a gelling agent into water and mixing them well to obtain a solution A; (3) adding konjac flour, adsorbent and additive to solution A and mixing to obtain solution B; (4) Fill solution B into a mold, let it stand for 4-8 hours, then steam and set it into shape, and then freeze it to obtain a semi-finished product; (5) Thawing, demoulding, cleaning and dehydrating the semi-finished product to obtain a dehydrated product; (6) Soaking the dehydrated product, dehydrating it again, washing it, and freeze-drying it to obtain a cigarette filter.

[0016] Preferably, the molding method in step (4) is to use positive pressure ventilation to fill solution B in a plexiglass tube model, and place it vertically after molding; the steaming temperature is 100°C ± 2°C, and the steaming time is 1-3h; the freezing temperature is -20°C, and the freezing time is 10-13h; Further preferably, the plexiglass tube model contains 30-40 plexiglass tubes, each of which has a diameter of 0.8-1.2 cm and a length of 15-25 cm.

[0017] More preferably, each of the organic glass jars has a diameter of 1.0 cm and a length of 20 cm.

[0018] Preferably, the soaking solution in step (6) is a 1-2% citric acid solution, and the soaking time is 30-60 minutes.

[0019] The beneficial effects of the present invention are: 1. After konjac flour forms gel, its fiber structure and adsorbent can effectively filter harmful substances in cigarettes, thereby reducing the potential harm of smoking to health.

[0020] 2. Konjac flour, adsorbents, etc. have excellent biodegradability and can reduce pressure on the environment.

[0021] 3. Use plant extracts as additives to add different flavors and tastes to cigarettes to meet different needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of the forming barrel in Example 1.

[0023] Figure 2 It is a top view of the molding barrel.

[0024] In the figure, 1 is a plexiglass tube, 2 is a clamp, 3 is a barrel, and 4 is a vent. DETAILED DESCRIPTION

[0025] The technical solution of the present invention is further explained below in conjunction with the accompanying drawings and specific embodiments. It is worth noting that the following embodiments are only preferred embodiments of the present invention and should not be understood as limiting the present invention. The protection scope of the present invention shall be based on the contents recorded in the claims. Any modification or replacement made by those skilled in the art to the technical solution of the present invention without creative work shall fall within the protection scope of the present invention.

[0026] Example 1 (1) mixing azodicarbonamide and sodium lauroyl glutamate in a mass ratio of 1:5 to obtain a composite foaming agent; (2) Add 0.6 parts of polysorbate-20, 1.5 parts of a composite foaming agent, 20 parts of anhydrous ethanol and 8 parts of sodium carbonate to 500 parts of water, and stir to obtain a solution A; (3) Add 30 parts of purified konjac powder, 2 parts of bamboo charcoal powder (passed through a 400-mesh sieve) and 1 part of peppermint extract (passed through a 100-mesh sieve) to solution A, and stir rapidly to obtain solution B; (4) Place solution B into a barrel containing multiple plexiglass tubes and slowly introduce compressed air so that solution B enters the plexiglass tubes from the bottom under pressure and evenly fills the plexiglass tubes. When solution B basically fills the plexiglass tubes, stop aeration and place the tubes vertically for 6 hours. (5) Place the organic glass tube after placement in a steamer, steam it at 100°C ± 2°C for 2 hours, cool it to room temperature indoors, and then transfer it to a -20°C cold storage and freeze it for 12 hours to obtain a semi-finished product; (5) Take out the semi-finished product, place it at room temperature to thaw, and then use a 0.5 cm diameter round stick to assist demolding, then soak and wash it in tap water for about 40 minutes, and dehydrate it in a centrifuge to obtain a dehydrated product; (6) The dehydrated product is soaked in a 1% citric acid solution for 60 minutes, then dehydrated by a centrifuge, washed by soaking in pure water for about 40 minutes, dehydrated by a centrifuge, and freeze-dried by a freeze dryer to obtain a cigarette filter.

[0027] Example 2 The method and steps are the same as those in Example 1, except that the amounts of raw materials are changed to 0.1 parts of surfactant, 1 part of composite foaming agent, 10 parts of anhydrous ethanol, 5 parts of sodium carbonate, 20 parts of purified konjac powder, 1 part of bamboo charcoal powder and 0.5 parts of mint extract to prepare a cigarette filter.

[0028] Example 3 The method and steps are the same as those in Example 1, except that the amounts of raw materials are changed to 1 part of surfactant, 2 parts of composite foaming agent, 30 parts of anhydrous ethanol, 10 parts of sodium carbonate, 50 parts of purified konjac powder, 5 parts of bamboo charcoal powder and 2 parts of mint extract to prepare a cigarette filter.

[0029] Example 4 The method and steps are the same as those in Example 1, except that the concentration of citric acid in step (6) is changed to 2% and the soaking time is changed to 30 min.

[0030] Comparative Example 1 The method and steps are the same as those in Example 1, except that azodicarbonamide is used as a foaming agent to prepare a cigarette filter.

[0031] Comparative Example 2 The method and steps are the same as those in Example 1, except that sodium lauroyl glutamate is used as the foaming material to prepare a cigarette filter.

[0032] Comparative Example 3 The method and steps are the same as those in Example 1, except that the konjac flour is replaced with glucomannan having a content of 55% and a viscosity of 18000 Pa·s to prepare a cigarette filter.

[0033] Comparative Example 4 The method and steps are the same as those in Example 1, except that the amount of konjac flour is changed to 15 parts, to prepare a cigarette filter.

[0034] Comparative Example 5 The method and steps are the same as those in Example 1, except that the amount of konjac flour is changed to 60 parts, to prepare a cigarette filter.

[0035] Comparative Example 6 The method and steps are the same as in Example 1, except that the amount of the surfactant is changed to 1.5 parts to prepare a cigarette filter.

[0036] Comparative Example 7 The method and steps are the same as those in Example 1, except that the mass ratio of azodicarbonamide to sodium lauroyl glutamate is changed to 1:1 to prepare a cigarette filter.

[0037] Comparative Example 8 The method and steps are the same as those in Example 1, except that the mass ratio of azodicarbonamide to sodium lauroyl glutamate is changed to 5:1 to prepare a cigarette filter.

[0038] Results: Take the cigarette filter tips prepared in the above embodiment and comparative example, and test their filtering effect on smoke according to the total filtering amount of harmful substances such as nicotine, tar, and monocarboxylic acid of ordinary cigarettes by the cigarette tips, which should be ≥15mg. The filter tips are buried in the soil for degradation, and the degradation time is calculated when the weight loss rate reaches 90%. The results are shown in Table 1: Table 1 Filtration effect and degradation rate of cigarette filters

[0039] The result shows: Embodiment 1-4 all has good performance, and embodiment 3 is optimal, and the maximum total filtration volume of density is the highest.Compared with embodiment 3, comparative examples 1 and 2 use separate foaming agents, and their poor forming effect density is too high and air permeability is poor, causing the total filtration volume to also decrease.Compared with embodiment 3, comparative example 3 is replaced with konjac flour of poor quality, and its poor forming effect density is low, causing the total filtration volume to also decrease.Compared with embodiment 3, comparative example 4 reduces the konjac flour dosage, and its poor forming effect density is low, causing the total filtration volume to also decrease.Compared with embodiment 3, comparative example 5 increases the konjac flour dosage, and its poor forming effect density is too high and air permeability is poor, causing the total filtration volume to decrease.Compared with embodiment 3, comparative examples 7 and 8 adjust two kinds of foaming agent ratios, and all appear that its poor forming effect density is too high and air permeability is poor, causing the total filtration volume to also decrease.

Claims

1. A cigarette filter based on konjac material, characterized in that: The cigarette filter comprises the following raw materials in parts by weight: 20-50 parts of konjac flour, 1-5 parts of adsorbent, 0.1-1 parts of surfactant, 1-2 parts of composite foaming agent, 5-10 parts of gelling agent, 10-30 parts of auxiliary agent and 0.5-2 parts of additive.

2. A cigarette filter based on konjac material according to claim 1, characterized in that: The adsorbent is bamboo charcoal powder or activated carbon.

3. A cigarette filter based on konjac material according to claim 1, characterized in that: The glucomannan content of the konjac flour is ≥85%, and the viscosity is 30000-35000 mPa·s.

4. A cigarette filter based on konjac material according to claim 1, characterized in that: The surfactant is a nonionic surfactant; the additive is a plant extract; the gelling agent is any one of sodium carbonate, sodium bicarbonate and calcium hydroxide; and the auxiliary agent is anhydrous ethanol.

5. A cigarette filter based on konjac material according to claim 4, characterized in that: The nonionic surfactant is polysorbate-20; the plant extract is any one of mint, rosemary and pine.

6. A cigarette filter based on konjac material according to claim 1, characterized in that: The composite foaming agent is prepared by mixing a foaming agent and a foaming material in a mass ratio of 1:

5.

7. A cigarette filter based on konjac material according to claim 6, characterized in that: The foaming agent is azodicarbonamide; and the foaming material is sodium lauroyl glutamate.

8. A method for preparing a cigarette filter based on konjac material as claimed in any one of claims 1 to 7, characterized in that: The steps include: (1) Compounding a foaming agent and a foaming material to obtain a composite foaming agent; (2) adding a surfactant, a foaming agent, an auxiliary agent and a gelling agent into water and mixing them well to obtain a solution A; (3) adding konjac flour, adsorbent and plant extract to solution A and mixing to obtain solution B; (4) Fill solution B into a mold, let it stand for 4-8 hours, then steam and set it into shape, and then freeze it to obtain a semi-finished product; (5) Thawing, demoulding, cleaning and dehydrating the semi-finished product to obtain a dehydrated product; (6) Soaking the dehydrated product, dehydrating it again, washing it, and freeze-drying it to obtain a cigarette filter.

9. The preparation method according to claim 8, characterized in that: The molding method in step (4) is to use positive pressure ventilation to fill solution B in the organic glass tube model, and place it vertically after molding; the cooking temperature is 100°C ± 2°C, and the cooking time is 1-3h; the freezing temperature is -20°C, and the freezing time is 10-13h; The soaking solution in step (6) is a 1-2% citric acid solution, and the soaking time is 30-60 minutes.

10. The preparation method according to claim 9, characterized in that: The organic glass tube model contains 30-40 organic glass tubes, each of which has a diameter of 0.8-1.2 cm and a length of 15-25 cm.

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