Seamless capsule for cigarettes and preparation method thereof

Abstract

The invention discloses a seamless capsule for cigarettes and a preparation method thereof, the seamless capsule for cigarettes comprises a content and a capsule shell wrapping the content, the content comprises an oil soluble liquid and at least one pellet, the at least one pellet is dispersed in the oil soluble liquid, the mass of the pellet is 100%, and the mass of the pellet is 100%. The pellet comprises 50%-99% of a hydrophilic polymer and 1%-50% of a water-soluble substance, and the melting point of the pellet is greater than or equal to 35 DEG C. According to the seamless capsule for the cigarette, the pellet carries the water-soluble substance, and the problem that the capsule is unstable in storage due to the fact that the water-soluble substance is insoluble or insoluble in an oily substance is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of tobacco processing, and in particular relates to a seamless capsule for cigarettes and a preparation method thereof. Background Art

[0002] Seamless capsules for cigarettes refer to round beads that can be squeezed and added to cigarette filters. The round beads are made of a plastic shell as the wall material, and a core material with aromatic substances is wrapped inside. Currently, most core materials are oily components, and a very small part of the core material is water-soluble. After the seamless capsules for cigarettes are squeezed, they can release some aromatic substances themselves. Finally, during the smoking process, the temperature of the smoke is used to increase the volatilization of the aromatic substances, and they enter the user's mouth during the smoking process, increasing the user's sensory experience.

[0003] The most important purpose of seamless tobacco capsules is to seal aromatic substances and release the aroma during the inhalation process after being pinched and broken. However, due to limitations in molding technology and materials, it is difficult for existing seamless tobacco capsules to stably encapsulate water-soluble substances. Many aromatic substances are difficult to dissolve or insoluble in oily substances. Even if they are emulsified and then encapsulated, they are difficult to store stably, which limits the flavor of seamless tobacco capsules. Therefore, it is urgent to prepare a seamless tobacco capsule that can encapsulate water-soluble substances. Summary of the invention

[0004] Aiming at the problem that the existing seamless capsules for cigarettes are unstable in storage after embedding water-soluble substances, the present invention provides a seamless capsule for cigarettes and a preparation method thereof.

[0005] The technical solution adopted by the present invention to solve the above technical problems is as follows:

[0006] In the first aspect, an embodiment of the present invention provides a seamless capsule for cigarettes, comprising contents and a capsule shell wrapping the contents, wherein the contents include an oil-soluble liquid and at least one micropill, at least one micropill is dispersed in the oil-soluble liquid, and based on the mass of the micropill being 100%, the micropill comprises 50% to 99% of a hydrophilic polymer and 1% to 50% of a water-soluble substance, and the melting point of the micropill is ≥35°C.

[0007] Optionally, the hydrophilic polymer is one or more polyethylene glycols, and the molecular weight of the polyethylene glycol is 400-8000 g / mol.

[0008] Optionally, the melting point of the micropellets is 35°C to 60°C.

[0009] Optionally, the particle size X1 of the seamless capsule for tobacco is 1.5 mm to 4.5 mm, the particle size X2 of the micropill is 0.1 mm to 2.25 mm, and X2 / X1≤0.5.

[0010] Optional, X2 / X1≤0.3.

[0011] Optionally, the micropellets further comprise glycerol.

[0012] Optionally, the gel shell comprises the following components by weight: 2-10 parts of gelling agent, 0.1-5 parts of plasticizer, 0-1 parts of curing agent, 0-0.5 parts of auxiliary agent, and 0.1-1.5 parts of water;

[0013] And / or, the oil-soluble liquid includes at least one of oil-soluble essence, tobacco essential oil, tobacco absolute oil, vegetable oil, and hydrogenated vegetable oil.

[0014] Optionally, the gelling agent includes at least one of carrageenan, gelatin, gellan gum, gum arabic, pectin, alginate, and agar;

[0015] And / or, the plasticizer includes at least one of sorbitol, propylene glycol, mannitol, and glycerol;

[0016] And / or, the curing agent includes at least one of magnesium chloride, potassium chloride and calcium chloride;

[0017] And / or, the auxiliary agent includes at least one of a pigment and a filler, and the filler includes at least one of silicon dioxide, calcium carbonate, magnesium carbonate, and pyridinium dichromate.

[0018] In a second aspect, the present invention also provides a method for preparing a seamless capsule for cigarettes, comprising the following steps:

[0019] Obtaining an oil-soluble liquid and a capsule liquid for preparing the capsule;

[0020] heating a hydrophilic polymer and mixing it with a water-soluble substance to obtain a mixed solution for preparing the micropellets;

[0021] The capsule liquid, the oil-soluble liquid and the mixed solution are dripped into the coolant through a coaxial three-layer dripper to obtain wet pellets in which the capsule wraps the oil-soluble liquid and the pellets;

[0022] The seamless capsule for cigarettes is obtained by drying and molding the wet pellets, wherein the particle size ratio of the seamless capsule is achieved by controlling the input amount of the oil-soluble liquid of each capsule and the input amount of the mixed solution of the micro-pellets.

[0023] Optionally, the melting point of the pellet is T, the temperature at the dripping head where the mixed solution is dripped is T1, and the temperature of the coolant is T2, and T, T1 and T2 satisfy the following relationship:

[0024] T+5℃≤T1≤T+25℃, 0≤T2≤20℃.

[0025] In the present invention, an oil-soluble liquid and at least one micropill are wrapped by a capsule. The micropills are made by mixing a hydrophilic polymer and a water-soluble substance and then dripping them into micropills, wherein the hydrophilic polymer contributes to the formation and stability of the micropills. When in use, the capsule is crushed, and the contents flow out and adhere to the fiber bundle of the filter rod. The micropills are melted by the flue gas with temperature, and their unique taste and aroma are continuously released, bringing lasting sensory enjoyment to consumers. The melting point of these micropills is ≥35°C, and they can melt quickly under the action of flue gas. The melting process of the micropills allows the water-soluble substances to be released, and then the fragrance is released, which enhances the aroma level of tobacco. Through this design, the micropills carry water-soluble substances to avoid direct contact with the capsule shell, and at the same time prevent the emulsification problem caused by insufficient mixing of water-soluble substances and oil-soluble liquids, effectively solving the stability problem of the capsule during storage. The present invention not only enriches the aroma of tobacco, but also significantly improves the sensory experience of users by embedding the micropills into capsules containing oil-soluble liquids, and then embedding the capsules into cigarettes. In addition, the application of this technology has greatly expanded the diversity of seamless cigarette capsules in terms of embedded contents, and provided more possibilities for the open utilization of seamless cigarette capsules. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of a seamless cigarette capsule provided by one embodiment of the present invention;

[0027] Figure 2 is a microscopic structure diagram of a seamless capsule for cigarettes provided in one embodiment of the present invention;

[0028] Figure 3 It is a microscopic structure diagram of a seamless capsule for cigarettes provided in another embodiment of the present invention.

[0029] The reference numerals in the drawings of the specification are as follows:

[0030] 1. Colloid shell; 2. Micropellets; 3. Oil-soluble liquid. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0032] like Figure 1 to Figure 3As shown, an embodiment of the present invention discloses a seamless capsule for cigarettes, comprising contents and a capsule shell 1 wrapping the contents, wherein the contents include an oil-soluble liquid 3 and at least one micropill 2, at least one micropill 2 is dispersed in the oil-soluble liquid 3, and based on the mass of the micropill 2 being 100%, the micropill 2 includes 50% to 99% of a hydrophilic polymer and 1% to 50% of a water-soluble substance, and the melting point of the micropill 2 is ≥35°C.

[0033] In this embodiment, an oil-soluble liquid 3 and at least one micropill 2 are wrapped by a capsule shell 1. The micropill 2 is made by mixing a hydrophilic polymer and a water-soluble substance and then dripping into the micropill 2, wherein the hydrophilic polymer contributes to the formation and stability of the micropill 2. When in use, the capsule is broken, the contents flow out, and adhere to the fiber bundle of the filter rod. The micropill is melted by the hot smoke, and its unique taste and aroma are continuously released, bringing lasting sensory enjoyment to consumers. The melting point of these micropills 2 is ≥35°C, and they can melt quickly under the action of smoke. The melting process of the micropill 2 allows the water-soluble substance to be released, and then the fragrance is released, thereby enhancing the aroma level of the tobacco. Through this design, the micropill 2 carries the water-soluble substance to avoid direct contact with the capsule shell 1, and at the same time prevents the emulsification problem caused by insufficient mixing of the water-soluble substance and the oil-soluble liquid 3, effectively solving the stability problem of the capsule during storage. The present invention embeds the water-soluble substance carried by the micro-pellets 2 into the capsule containing the oil-soluble liquid 3, and then embeds the capsule into the cigarette, which not only enriches the aroma of tobacco, but also significantly improves the sensory experience of users. In addition, the application of this technology greatly expands the diversity of the embedded contents of the seamless capsule for cigarettes, and provides more possibilities for the open use of the seamless capsule for cigarettes.

[0034] Specifically, the water-soluble substances include but are not limited to water-soluble flavors, food flavor substances, water-soluble polysaccharides, sodium chloride, potassium chloride, sodium citrate or potassium citrate. The water-soluble flavors are carried by the micro-pellets 2 to improve the aroma level of the smoke.

[0035] The content of hydrophilic polymer includes but is not limited to 50%, 54%, 58%, 62%, 66%, 70%, 74%, 78%, 82%, 86%, 90%, 94% or 99%. The content of water-soluble substance includes but is not limited to 1%, 5%, 10%, 14%, 18%, 22%, 26%, 30%, 34%, 38%, 42%, 46% or 50%.

[0036] In some embodiments, the hydrophilic polymer is one or more polyethylene glycols, and the molecular weight of the polyethylene glycol is 400-8000g / mol. The hydrophilic polymer, mainly one or more polyethylene glycols with a molecular weight between 400-8000g / mol, is used to make microcapsules. The choice of this polymer not only ensures the formability of the microcapsules during the dripping process, but also promotes the rapid dissolution of the microcapsules when the flue gas passes through, thereby effectively releasing the water-soluble components it carries. In order to meet the specific melting point requirements of the microcapsules, polyethylene glycols of different molecular weights can be selected and mixed as needed, or polyethylene glycol of a single molecular weight can be used to control the melting point of the microcapsules to ≥35°C to ensure that they stably release the active ingredients at a predetermined temperature. Specifically, the molecular weight of the polyethylene glycol can be 400 g / mol, 600 g / mol, 800 g / mol, 1000 g / mol, 1500 g / mol, 2000 g / mol, 3000 g / mol, 4000 g / mol, 6000 g / mol or 8000 g / mol.

[0037] In some embodiments, the melting point of the micropill 2 is 35°C to 60°C. By selecting micropills 2 with the above melting point, it is ensured that the micropills 2 will not melt due to the increase in ambient temperature during storage, thereby avoiding the adhesion problem between the micropills 2 and the capsule shell 1. Secondly, this melting point range prevents the micropills 2 from being liquid at room temperature, which causes the micropills 2 to absorb water and dissolve with the capsule shell 1 during the dripping process, affecting the molding quality of the micropills 2. At the same time, if the melting point of the micropills 2 is too high, it will make it difficult for the capsule liquid to connect evenly during the dripping process, which may cause the surface of the micropills 2 to be uneven. Therefore, selecting a melting point range of 35°C-60°C not only ensures the stability of the micropills 2, but also optimizes the drip molding process, ensuring the uniformity and consistency of the micropills 2.

[0038] In a preferred embodiment, the melting point of the micro-pellets 2 is 40° C. to 60° C., which further increases the storage time of the micro-pellets 2 and improves the yield of the micro-pellets 2 .

[0039] In a preferred embodiment, the melting point of the micro-pellets 2 is 40° C. to 45° C., which further increases the storage time of the micro-pellets 2 and improves the yield of the micro-pellets 2 .

[0040] In some embodiments, the particle size X1 of the seamless capsule for cigarettes is 1.5 mm to 4.5 mm, the particle size X2 of the microcapsule 2 is 0.1 mm to 2.25 mm, and X2 / X1≤0.5. In the production process of the seamless capsules, the contact between the microcapsules and the inner wall of the capsule is a key factor, which directly affects the molding rate and storage performance of the capsules. When the X2 / X1 ratio is large, the microcapsules are affected by their own gravity during the molding stage, and the microcapsules 2 sink and come into contact and dissolve with the outer wall of the capsule, making it difficult to drip and mold. By selecting the particle size ratio of the seamless capsules and the microcapsules 2 within the above range, not only the molding rate of the seamless capsules for cigarettes is improved, ensuring the high efficiency of the production process, but also the storage time of the capsules is extended, and the stability and reliability of the product are improved.

[0041] In a preferred embodiment, X2 / X1≤0.3, which further improves the forming rate and storage time of the seamless cigarette capsule.

[0042] In a preferred embodiment, X2 / X1≤0.1, which further improves the forming rate and storage time of the seamless cigarette capsule.

[0043] In some embodiments, the microcapsules 2 further include glycerol. The microcapsules 2 carry glycerol. During smoking, the microcapsules 2 melt and release glycerol, which can effectively adjust the humidity of the smoke, reduce the irritation of the smoke to the respiratory tract, and increase the softness of the smoke.

[0044] In some embodiments, the capsule shell 1 includes the following components by weight: 2-10 parts of gelling agent, 0.1-5 parts of plasticizer, 0-1 parts of curing agent, 0-0.5 parts of auxiliary agent, and 0.1-1.5 parts of water; firstly, by adding the plasticizer, not only the strength of the capsule shell 1 is enhanced, but also its elasticity is improved, which effectively avoids the problem of the capsule shell 1 breaking during storage. In addition, the introduction of the curing agent promotes the gelation of the capsule shell 1, forms a strong capsule wall, and further enhances the structural stability of the capsule.

[0045] As a key component in the formulation of the capsule shell 1, water is not only a medium for the gelling agent and the plasticizer to function, but also directly participates in the curing reaction, and has a direct impact on the elasticity and disintegration performance of the capsule shell. By precisely controlling the water content, the present invention achieves the easy formability and curing properties of the capsule shell 1, optimizes the production process, and ensures the reliability and consistency of the capsule in actual use.

[0046] This formula component not only improves the physical properties of the capsule shell 1, but also ensures the stability of the capsule during production and use, providing users with a higher quality product experience.

[0047] In some embodiments, the oil-soluble liquid 3 includes at least one of oil-soluble flavors, tobacco essential oil, tobacco absolute oil, vegetable oil, and hydrogenated vegetable oil. The oil-soluble flavors, tobacco essential oil, tobacco absolute oil, and water-soluble flavors are used in combination to improve the aroma level of the smoke.

[0048] In some embodiments, the gelling agent comprises at least one of carrageenan, gelatin, gellan gum, gum arabic, pectin, alginate, and agar;

[0049] In some embodiments, the plasticizer includes at least one of sorbitol, propylene glycol, mannitol, and glycerol;

[0050] In some embodiments, the curing agent includes at least one of magnesium chloride, potassium chloride, and calcium chloride;

[0051] In some embodiments, the auxiliary agent includes at least one of a pigment and a filler, and the filler includes at least one of silicon dioxide, calcium carbonate, magnesium carbonate, and pyridinium dichromate. By adding the filler, the roughness of the capsule is increased, and the molding rate of the capsule is further improved. The pigment includes artificial synthetic pigments, natural pigments, etc. By adding the pigment to color the capsule shell 1, the aesthetic performance is enhanced, and it is also convenient to distinguish seamless capsules for cigarettes of different flavors.

[0052] In this embodiment, the gelling agent, plasticizer and curing agent are selected to make the plastic shell 1 not easy to break and flexible, so as to protect the internal contents.

[0053] An embodiment of the present invention further provides a method for preparing a seamless capsule for cigarettes, comprising the following steps:

[0054] Obtaining an oil-soluble liquid 3 and a capsule liquid for preparing the capsule 1;

[0055] The hydrophilic polymer is heated and mixed with the water-soluble substance to obtain a mixed solution for preparing the micropellets 2;

[0056] The capsule liquid, the oil-soluble liquid 3 and the mixed solution are dripped into the coolant through a coaxial three-layer dripper to obtain wet pellets in which the capsule 1 envelops the oil-soluble liquid 3 and the pellets 2;

[0057] The wet pellets are dried and formed to obtain the seamless capsules for cigarettes. The capsule shell liquid is prepared by the dripping method so that the capsule shell liquid forms seamless capsules in the coolant, and the particle sizes of the seamless capsules and the pellets 2 are controlled by controlling the input amount of the capsule shell liquid, the input amount of the oil-soluble liquid and the input amount of the mixed solution of the pellets per capsule, and the number of the pellets 2 in the seamless capsule is further controlled by controlling the dripping speed of the dripper.

[0058] In some embodiments, the melting point of the pellet 2 is T, the temperature at the dripping head where the mixed solution is dripped is T1, and the temperature of the coolant is T2, and T, T1 and T2 satisfy the following relationship:

[0059] T+5℃≤T1≤T+25℃, 0≤T2≤20℃. The temperature T1 at the dripper where the mixed solution is dripped is the temperature of the mixed solution at the outlet. The present invention prepares a seamless capsule with a stable structure by controlling the process, in which microcapsules 2 and oil-soluble liquid 3 are encapsulated. The key process parameters include the temperature T1 of the mixed solution at the dripper, the melting point T of the microcapsules, the temperature T2 of the receiving coolant, and the size of the seamless capsule and the microcapsules 2. When the difference between the temperature T1 of the mixed solution at the outlet and the melting point T of the microcapsules is in the range of T+5℃≤T1≤T+25℃, 0≤T2≤20℃, the microcapsules can solidify and form, and then be wrapped in the capsule, and can be dispersed in the oil-soluble liquid. When the difference between T1 and T is large, the time required for the mixed solution to solidify is prolonged, which increases the possibility that the microcapsules 2 contact the outer wall of the capsule 1 and absorb water and dissolve before solidification. On the contrary, when the difference is small, the coagulation time of the mixed solution is shortened, and pellet 2 is more likely to coagulate prematurely, resulting in the inability to effectively separate and embed into the capsule.

[0060] In order to solve this problem, the present invention optimizes the solidification process of the micro-pellets 2 by adjusting the above parameters, ensuring that the micro-pellets 2 can be solidified within an appropriate time and successfully embedded in the seamless capsule. This method not only improves production efficiency, but also ensures uniform distribution and stability of the micro-pellets 2 and the oil-soluble liquid 3 in the capsule, thereby providing users with higher quality products.

[0061] Specifically, the melting point of the pellet 2 is a range value, the endpoints of the range are the initial melting temperature and the final melting temperature, and the final melting temperature in the above relationship needs to satisfy the above relationship to ensure that the pellet 2 is embedded in the capsule.

[0062] Specifically, the melting point of the micro-pellets 2 is 35° C. to 45° C., and T1 ≥ T+5° C. Within this range, the capsule shell 1 is convenient for embedding the micro-pellets 2 and the oil-soluble liquid 3 .

[0063] In a preferred embodiment, the melting point of the micro-pellets 2 is 40° C. to 60° C., and T1 ≥ T+15° C. Within this range, the capsule shell 1 is convenient for embedding the micro-pellets 2 and the oil-soluble liquid 3 .

[0064] In a preferred embodiment, the melting point of the micro-pellets 2 is 40° C. to 45° C., and T1 ≥ T+10° C. Within this range, the capsule shell 1 is convenient for embedding the micro-pellets 2 and the oil-soluble liquid 3 .

[0065] In a preferred embodiment, T1 ≥ T+20°C.

[0066] In a preferred embodiment, 0≤T2≤15° C. The coolant is used to receive the wet pellets. The lower the temperature of the coolant, the better the cooling effect on the wet pellets, and the easier it is to maintain the stability of the wet pellets.

[0067] In a preferred embodiment, 0≤T2≤10°C, further reducing the temperature of the coolant and improving the stability of the wet pellets.

[0068] In a preferred embodiment, 0≤T2≤5°C, further reducing the temperature of the coolant and improving the stability of the wet pellets.

[0069] The present invention is further described below by way of examples.

[0070] Example 1

[0071] This embodiment is used to illustrate the seamless capsule for cigarettes disclosed in the present invention and the preparation method thereof.

[0072] The shell liquid is prepared by adding 8 parts of gelling agent, namely carrageenan, 2 parts of sodium alginate, and 0.1 parts of plasticizer, propylene glycol, into 0.1 parts of water and heating to dissolve them to obtain the shell liquid.

[0073] The mixed solution for forming micro-pellets 2 is prepared by heating and dissolving 70% polyethylene glycol and 30% water-soluble substances and keeping the mixture at 45°C to obtain a mixed solution for preparing micro-pellets 2. The average molecular weight of polyethylene glycol is 4000 g / mol, and the melting point of micro-pellets 2 is 35-40°C.

[0074] The capsule liquid is mixed with the oil-soluble liquid 3, and the mixed solution is precisely dripped into the coolant at 45°C through a coaxial three-layer dripper. In particular, the input amount of the oil-soluble liquid 3 for each capsule is controlled at 113mm 3 , while the mixed solution input of pellet 2 is 0.11 mm 3 The mixed solution dripped in was received by a cooling liquid at 3.2°C to form wet pellets. After drying, seamless capsules for cigarettes with a particle size of 3.0 mm and X2 / X1 of 0.1 were obtained.

[0075] Example 2

[0076] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0077] The shell liquid includes 10 parts of gelling agent, i.e., gelatin, and 5 parts of plasticizer, i.e., propylene glycol;

[0078] In particular, the amount of oil-soluble liquid 3 input per capsule is controlled at 381.3 mm 3 , the mixed solution input amount of each pellet 2 is 0.382mm 3, the coolant temperature is 3.3℃, ​​the particle size of the seamless cigarette capsule is 4.5mm, and X2 / X1 is 0.1.

[0079] Example 3

[0080] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0081] The shell liquid includes 5 parts of gellan gum, a gelling agent, 1 part of sodium alginate, 2 parts of glycerol, a plasticizer, 1 part of magnesium chloride, a curing agent, and 0.2 parts of silicon dioxide as a filler;

[0082] In particular, the amount of oil-soluble liquid 3 input per capsule is 14.1 mm 3 , the mixed solution input amount of each pellet 2 is 0.014mm 3 , the coolant temperature is 3.9℃, the particle size of the seamless cigarette capsule is 1.5mm, and X2 / X1 is 0.1.

[0083] Example 4

[0084] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0085] The gel shell liquid includes 2 parts of gelling agent, i.e. carrageenan, and 0.1 parts of plasticizer, i.e. propylene glycol;

[0086] The coolant temperature is 3.7°C, the particle size of the seamless cigarette capsule is 3.0 mm, and X2 / X1 is 0.1.

[0087] Example 5

[0088] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0089] Micropellets 2 include 50% polyethylene glycol and 50% water-soluble substances, which are heated to dissolve and kept warm at 55°C to obtain a mixed solution for preparing micropellets 2. The average molecular weight of polyethylene glycol is 6000 g / mol, and the melting point of micropellets 2 is 45-50°C.

[0090] Example 6

[0091] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0092] Micropellets 2 include 99% polyethylene glycol and 1% water-soluble substances, which are heated to dissolve and kept warm at 65°C to obtain a mixed solution for preparing micropellets 2. The average molecular weight of polyethylene glycol is 6000 g / mol, and the melting point of micropellets 2 is 55-60°C.

[0093] The coolant temperature is 4.1℃ coolant.

[0094] Example 7

[0095] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0096] Micropellets 2 include 80% polyethylene glycol and 20% water-soluble substances, which are heated to dissolve and kept warm at 55°C to obtain a mixed solution for preparing micropellets 2. The average molecular weight of polyethylene glycol is 8000 g / mol, and the melting point of micropellets 2 is 45-50°C.

[0097] The coolant temperature is 4.4°C.

[0098] Example 8

[0099] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0100] In particular, the oil-soluble liquid 3 input amount per capsule is 99 mm 3 , the mixed solution input of each pellet 2 is 14.1mm 3 , the coolant temperature is 4.4℃, the particle size of the seamless cigarette capsule is 3.0mm, and X2 / X1 is 0.5.

[0101] Example 9

[0102] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0103] In particular, the amount of oil-soluble liquid 3 input per capsule is 110 mm 3 , the mixed solution input of each capsule pellet 2 is 3.05mm 3 , the coolant temperature is 4.4℃, the particle size of the seamless cigarette capsule is 3.0mm, and X2 / X1 is 0.3.

[0104] Example 10

[0105] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0106] The coolant temperature is 18°C.

[0107] Embodiment 11

[0108] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0109] The coolant temperature is 13°C.

[0110] Example 12

[0111] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0112] The coolant temperature is 7°C.

[0113] Embodiment 13

[0114] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0115] The mixed solution of the shell liquid, the oil-soluble liquid 3 and the 50° C. solution for preparing the micropellets 2 is dripped into the coolant through a coaxial three-layer dripper.

[0116] Embodiment 14

[0117] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0118] The mixed solution of the shell liquid, the oil-soluble liquid 3 and the micropellet 2 at 55° C. is dripped into the coolant through a coaxial three-layer dripper.

[0119] Embodiment 15

[0120] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0121] The mixed solution of the shell liquid, the oil-soluble liquid 3 and the 60° C. solution for preparing the micropellets 2 is dripped into the coolant through a coaxial three-layer dripper.

[0122] Example 16

[0123] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0124] The average molecular weight of polyethylene glycol is 4000 g / mol, and it is a mixture of PEG400 and PEG6000. The melting point of micropellet 2 is 35-40°C.

[0125] Embodiment 17

[0126] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0127] The average molecular weight of polyethylene glycol is 6000 g / mol, and it is a mixture of PEG4000 and PEG8000. The melting point of micropellet 2 is 55-60°C.

[0128] Comparative Example 1

[0129] This comparative example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0130] Micropellets 2 include 45% polyethylene glycol and 55% water-soluble substances, which are heated to dissolve and kept warm at 30°C to obtain a mixed solution for preparing micropellets 2. The average molecular weight of polyethylene glycol is 4000 g / mol, and the melting point of micropellets 2 is 20-24°C.

[0131] The temperature of the coolant was 4.4°C, the particle size of the seamless cigarette capsule was 3.0 mm, the micropellets 2 could not solidify, and they were miscible with the capsule shell 1 during the drying process and could not be separated.

[0132] Comparative Example 2

[0133] This comparative example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0134] The temperature of the coolant is 23°C, the particle size of the seamless capsule for cigarettes is 3.0 mm, and the water-soluble microcapsules are miscible with the capsule shell 1 during the receiving process and cannot be separated.

[0135] Comparative Example 3

[0136] This comparative example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0137] The input volume of the soluble liquid 3 per capsule oil is 74.3 mm 3 , the mixed solution input of each pellet 2 is 38.79mm 3 , the coolant temperature is 4.4℃, the particle size of the seamless capsule for cigarette is 3.0mm, and X2 / X1 in the wet pellet is 0.7. The water-soluble microcapsules are miscible with the capsule shell 1 during the receiving process and cannot be separated.

[0138] Comparative Example 4

[0139] This comparative example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0140] The mixed solution of the shell liquid, the oil-soluble liquid 3 and the micropellet 2 at 43° C. is dripped into the cooling liquid through a coaxial three-layer dripper.

[0141] The coolant temperature is 3.2°C, the particle size of the seamless cigarette capsule is 3.0 mm, and X2 / X1 is 0.1.

[0142] Comparative Example 5

[0143] This comparative example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0144] The mixed solution of the shell liquid, the oil-soluble liquid 3 and the 65° C. solution for preparing the micropellets 2 is dripped into the coolant through a coaxial three-layer dripper.

[0145] The temperature of the coolant is 3.2°C, the particle size of the seamless cigarette capsule is 3.0 mm, X2 / X1 is 0.1, and the micropellets 2 are miscible with the capsule shell 1 during the receiving process and cannot be separated.

[0146] Comparative Example 6

[0147] This comparative example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0148] The oil-soluble liquid and the water-soluble flavor are emulsified, and the emulsified contents and the capsule liquid are dripped into the coolant through a coaxial double-layer dripper and received by the coolant at 3.2°C to obtain wet pills. After drying, the obtained seamless capsules for cigarettes have a particle size of 3.0 mm.

[0149] Comparative Example 7

[0150] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0151] The average molecular weight of polyethylene glycol is 600 g / mol, and it is a mixture of PEG400 and PEG1000. The melting point of microcapsule 2 is 20-25° C. The water-soluble microcapsules dissolve during the drying process and penetrate into the wall material.

[0152] Comparative Example 8

[0153] This example is used to illustrate the seamless capsule for cigarettes and the preparation method thereof disclosed in the present invention, and is different from Example 1 in that:

[0154] The input volume of oil-soluble liquid 3 in a single capsule is 523.1 mm 3 , the mixed solution input of single capsule pellet 2 is 0.52mm 3 The particle size of seamless capsules for cigarettes is 5.0 mm, and X2 / X1 in wet pills is 0.1. The capsules are deformed by compression and stretching and cannot be spherical.

[0155] Performance Testing

[0156] The seamless capsules for cigarettes prepared in the above-mentioned embodiments and comparative examples were subjected to a product structural integrity test, specifically: 100 seamless capsules for cigarettes prepared in each embodiment and comparative example were randomly selected, the adhesion between the microcapsules 2 and the capsule shell 1 was observed, and the yield was calculated.

[0157] 100 seamless capsules for cigarettes prepared in each embodiment and comparative example were randomly selected, and after storage for 30 days, the adhesion between the micro-pills 2 and the capsule shell 1 was observed, and the yield rate was calculated.

[0158] The yield rate calculation formula is: yield rate (%) = 100% * number of non-adhesion / 100. The specific test results are shown in Table 1.

[0159] Table 1

[0160] sample Yield before storage / % Finished product rate after storage / % Example 1 100 100 Example 2 99 99 Example 3 100 100 Example 4 100 100 Example 5 90 87 Example 6 92 88 Example 7 95 89 Example 8 90 86 Example 9 97 94 Example 10 90 85 Embodiment 11 93 91 Example 12 97 94 Embodiment 13 96 95 Embodiment 14 92 90 Embodiment 15 90 96 Example 16 97 94 Embodiment 17 99 99 Comparative Example 1 0 0 Comparative Example 2 0 0 Comparative Example 3 0 0 Comparative Example 4 43 1 Comparative Example 5 0 0 Comparative Example 6 54 9 Comparative Example 7 0 0 Comparative Example 8 0 0

[0161] By comparing the test results of Examples 1, 5-7 and Comparative Example 1, it can be seen that the melting point of the micropills has a great influence on the embedding effect. In the dripping process, the mixed solution for preparing the micropills solidifies too early or too late, which is not conducive to the stable structure of the seamless capsule. From the test results of Examples 1, 16-17 and Comparative Example 7, it can be seen that the hydrophilic polymer in the mixed solution for preparing the micropills can be composed of polyethylene glycol with a single molecular weight or different molecular weights. In this embodiment, the melting point of the micropills is controlled to be ≥35°C by selecting polyethylene glycol with a single molecular weight or a mixture of different molecular weights, so as to facilitate the dripping molding of the micropills.

[0162] By comparing Example 1, Example 8 and Example 9 and Comparative Example 3 and Comparative Example 8, it can be seen that the embedded micropills have size restrictions. Micropills that are too large are more likely to contact with the capsule shell before condensation and finalization, causing mutual dissolution, and cannot form independent micropills. In addition, the size of the micropills and capsules is determined by the input amount of the oil-soluble liquid and the input amount of the mixed solution of the micropills. If the input amount of the mixed solution of the micropills is too large, the solidification time is prolonged, and it is easy to contact with the capsule shell before solidification and forming, resulting in mutual dissolution problems, and independent micropills cannot be formed. When the input amount of the oil-soluble liquid is too large, the wet pill volume will be too large. Due to the density difference between the capsule shell, oil-soluble liquid, etc. of the wet pill in the coolant, the capsule shell liquid will not be solidified into a spherical shape due to the influence of the dead weight of the capsule shell and the oil-soluble liquid.

[0163] By comparing Examples 1, 10-12 and Comparative Example 2, it can be seen that the temperature of the coolant has a great influence on the shaping cooling of the seamless capsule, and too high a temperature is not conducive to the structural stability of the capsule.

[0164] By comparing Examples 1, 13-15 and Comparative Examples 4 and 5, it can be seen that the difference between the temperature and the melting point of the mixed solution for preparing micropills at the outlet of the dripper during the embedding process has a great influence on the stability of the seamless capsule structure. Too high a temperature difference is not easy to solidify the PEG solution, and too low a temperature difference will affect the drip molding of the capsule.

[0165] By comparing the test results of Example 1 and Comparative Example 6, it can be seen that after the capsules are stored for the same time, compared with the capsules embedded after emulsification, the capsules carrying the water-soluble flavors through microcapsules in the present application have a longer storage time and a more stable capsule structure.

[0166] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A seamless capsule for cigarettes, characterized in that: The invention comprises contents and a capsule shell encapsulating the contents, wherein the contents comprise an oil-soluble liquid and at least one micropill, at least one micropill is dispersed in the oil-soluble liquid, and based on 100% by mass of the micropill, the micropill comprises 50% to 99% of a hydrophilic polymer and 1% to 50% of a water-soluble substance, and the melting point of the micropill is ≥35°C.

2. The seamless capsule for cigarettes according to claim 1, characterized in that: The hydrophilic polymer is one or more polyethylene glycols, and the molecular weight of the polyethylene glycol is 400-8000 g / mol.

3. The seamless capsule for cigarettes according to claim 1, characterized in that: The melting point of the micropellets is 35°C to 60°C.

4. The seamless capsule for cigarettes according to claim 1, characterized in that: The particle size X1 of the seamless capsule for cigarettes is 1.5 mm to 4.5 mm, the particle size X2 of the micro-pellets is 0.1 mm to 2.25 mm, and X2 / X1≤0.

5.

5. The seamless capsule for cigarettes according to claim 4, characterized in that: X2 / X1≤0.

3.

6. The seamless capsule for cigarettes according to claim 1, characterized in that: The pellets also include glycerol.

7. The seamless capsule for cigarettes according to claim 1, characterized in that: The gel shell comprises the following components by weight: 2-10 parts of gelling agent, 0.1-5 parts of plasticizer, 0-1 parts of curing agent, 0-0.5 parts of auxiliary agent, and 0.1-1.5 parts of water; And / or, the oil-soluble liquid includes at least one of oil-soluble essence, tobacco essential oil, tobacco absolute oil, vegetable oil, and hydrogenated vegetable oil.

8. The seamless capsule for cigarettes according to claim 7, characterized in that: The gelling agent comprises at least one of carrageenan, gelatin, gellan gum, gum arabic, pectin, alginate, and agar; And / or, the plasticizer includes at least one of sorbitol, propylene glycol, mannitol, and glycerol; And / or, the curing agent includes at least one of magnesium chloride, potassium chloride and calcium chloride; And / or, the auxiliary agent includes at least one of a pigment and a filler, and the filler includes at least one of silicon dioxide, calcium carbonate, magnesium carbonate, and pyridinium dichromate.

9. A method for preparing a seamless capsule for tobacco according to any one of claims 1 to 8, characterized in that: The following steps are involved: Obtaining an oil-soluble liquid and a capsule liquid for preparing the capsule; heating a hydrophilic polymer and mixing it with a water-soluble substance to obtain a mixed solution for preparing the micropellets; The capsule liquid, the oil-soluble liquid and the mixed solution are dripped into the coolant through a coaxial three-layer dripper to obtain wet pellets in which the capsule wraps the oil-soluble liquid and the pellets; The seamless capsule for cigarettes is obtained by drying and molding the wet pellets, wherein the particle size ratio of the seamless capsule is achieved by controlling the input amount of the oil-soluble liquid of each capsule and the input amount of the mixed solution of the micro-pellets.

10. The method for preparing seamless capsules for cigarettes according to claim 9, characterized in that: The melting point of the pellets is T, the temperature at the dripping head where the mixed solution is dripped is T1, and the temperature of the coolant is T2. T, T1 and T2 satisfy the following relationship: T+5℃≤T1≤T+25℃, 0≤T2≤20℃.

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