阅读说明：本技术 一种加热不燃烧烟复合降温滤嘴棒及其应用 (Heating non-combustible cigarette composite cooling filter tip rod and application thereof ) 是由 刘华 黄治 李曦 王东方 丁康钟 何蓉 易虹宇 谭广璐 齐延鹏 吴金凤 于 2021-08-31 设计创作，主要内容包括：本发明公开了一种加热不燃烧烟复合降温滤嘴棒及其应用,涉及卷烟滤棒技术领域,一种加热不燃烧烟复合降温滤嘴棒,包括滤芯以及包裹在滤芯外的成型纸,所述滤芯包括醋纤段和异形段,所述异形段内设置有降温通道,所述降温通道的横截面积沿着远离卷烟烟丝段的方向逐渐减小,所述成型纸上于异形段对应的位置开设有若干通气孔,所述通气孔位于靠近醋纤段的一端。本发明的一种加热不燃烧烟复合降温滤嘴棒,利用文丘里效应,将外界空气吸入滤嘴棒内,达到降低烟气温度的效果。(The invention discloses a heating non-combustible cigarette composite cooling filter rod and application thereof, and relates to the technical field of cigarette filter rods. The composite cooling filter tip for heating non-combustible burning cigarettes utilizes the Venturi effect to suck outside air into the filter tip, so that the effect of reducing the temperature of smoke is achieved.)

1. The filter element comprises an acetate fiber section and a special-shaped section, a cooling channel is arranged in the special-shaped section, the cross-sectional area of the cooling channel is gradually reduced along the direction far away from the cigarette tobacco section, a plurality of vent holes are formed in the position, corresponding to the special-shaped section, of the forming paper, and the vent holes are located at one end close to the acetate fiber section.

2. The composite cooling filter tip rod for heating non-combustible smoke according to claim 1, wherein the profiled section is provided with moisture absorption cooling fiber bundles at a position corresponding to the cooling channel, and the moisture absorption cooling fiber bundles are formed by twisting acetate fibers and modified cooling fibers.

3. The composite cooling filter rod for heating non-combustible smoke according to claim 2, wherein the modified cooling fiber is of a double-layer structure with chitin/polylactic acid as a core layer and polyimide as a skin layer, the skin layer is loaded with aluminum nitride, and the skin layer is of a porous structure.

4. The composite temperature-reducing filter rod for heating non-combustible smoke according to claim 3, wherein the core layer is also loaded with heat-absorbing microcapsules.

5. A heating non-combustible smoke composite cooling filter rod according to any one of claims 1 to 4, characterized in that a plurality of said vent holes are divided into one or more rows which are uniformly arranged along the circumference of the filter rod, and each row of said vent holes is arranged on the same horizontal plane.

6. The composite temperature-reducing filter rod for heating non-combustible smoke according to claim 5, wherein the shortest distance between the vent holes and the acetate fiber section is 1-2mm, and the distance between two adjacent rows of the vent holes is 0.8-1.5 mm.

7. The composite temperature-reducing filter rod for heating non-combustible smoke according to any one of claims 6, wherein a plurality of air-permeable channels are uniformly arranged on the outer surface of the special-shaped section.

8. The composite temperature-reducing filter rod for heating non-combustible smoke according to claim 7, wherein the cross section of the air-permeable channel is in a triangular structure.

9. The composite temperature-reducing filter rod for heating non-combustible smoke according to claim 8, wherein the depth dimension of the air-permeable channels is 1.6mm to 2.4mm, and the total cross-sectional area of the air-permeable channels is 7.2mm²-16.8mm²。

10. Use of a composite filter rod for cooling of tobacco which does not burn when heated, according to any of claims 1 to 9, in the heating of tobacco which does not burn.

Technical Field

The invention relates to the technical field of cigarette filter sticks, in particular to a composite cooling filter stick for heating non-combustible cigarettes and application thereof.

Background

Most harmful components in the smoke of the traditional cigarette are generated in the high-temperature thermal cracking process generated during the burning of the cigarette, and along with the rise of the central temperature of the cigarette end, the content of the harmful components in the smoke is increased, a large amount of smoke containing biological toxicity and harmful chemical components can be generated, and the cigarette is harmful to human health and pollutes the environment. Therefore, under the ceremony of modern technological force, tobacco products which do not use open fire, namely cigarettes which are not burnt by heating, appear. The cigarette is heated by a special heat source to generate smoke similar to the traditional cigarette for the smoking of consumers, and the harmful chemical components and the biological toxicity in the smoke are greatly reduced.

However, because of the lower temperature of the heated cigarette, although the produced harmful components are reduced and smoldering is avoided, the released smoke volume and the smoke concentration are lower, in order to meet the requirements of smokers, the cigarette is generally shorter in length and lower in smoke resistance so as to improve the mouth smoke taste, and because of the low heating temperature, the smoke has high water content and the smoke passage is shortened, the sensory temperature of the mainstream smoke reaching the oral cavity is higher than that of the traditional cigarette. And current cigarette flue gas cooling, mostly adopt to add heat absorbing material such as polylactic acid in the filter tip, or add phase change material's mode, for example the heat in the mode absorption flue gas of polyvinyl alcohol, reach the effect of cooling, and wherein use polylactic acid heat absorbing material, because the reason of being heated, can lead to the condition of collapsing appearing, lead to the filter tip to inhale and hinder the increase, influence the suction experience, and present filter tip can not consider the problem that moisture content is high in the flue gas and lead to sense organ temperature height mostly, also lead to current filter tip cooling effect not good.

Disclosure of Invention

In view of the above problems, the present invention is to provide a composite cooling filter rod for heating non-combustible smoke and its application, which uses the venturi effect to suck the outside air into the filter rod, so as to achieve the effect of reducing the temperature of the smoke.

The invention solves the technical problems by the following technical means:

the filter element comprises an acetate fiber section and a special-shaped section, a cooling channel is arranged in the special-shaped section, the cross-sectional area of the cooling channel is gradually reduced along the direction far away from the cigarette tobacco section, a plurality of vent holes are formed in the position, corresponding to the special-shaped section, of the forming paper, and the vent holes are located at one end close to the acetate fiber section.

According to the binary composite cooling filter tip rod, the cooling channel is arranged in the special-shaped section, when smoke flows through the cooling channel, the cross-sectional area of the cooling channel is gradually reduced, so that the overflowing end face of the smoke is reduced, the flow velocity of the smoke is increased, the pressure of fluid is further reduced, negative pressure is generated near the smoke flowing at high speed, namely a Venturi effect, the vent hole is just arranged in a region generating the negative pressure, more outside air can be sucked into the filter stick through the vent hole, and the effect of reducing the temperature of the smoke is achieved.

Furthermore, the special-shaped section is provided with a moisture absorption cooling fiber bundle at a position corresponding to the cooling channel, and the moisture absorption cooling fiber bundle is formed by twisting acetate fibers and modified cooling fibers.

Further, the modified cooling fiber is of a double-layer structure with chitin/polylactic acid as a core layer and polyimide as a skin layer wrapped outside, wherein the skin layer is loaded with aluminum nitride and is of a porous structure.

The moisture absorption and cooling fiber bundles are arranged at the cooling channel and combined with the cooling channel, so that the temperature of the flue gas can be further reduced, meanwhile, the moisture in the flue gas can be absorbed, and the taste of the flue gas is improved; according to the modified cooling fiber, the chitin in the core layer has a good moisture absorption effect, but the heat resistance is not strong, the chitin and the polylactic acid are compounded, the heat resistance of the core layer can be improved to a certain extent, meanwhile, the polylactic acid also has a good heat absorption effect, the polyimide serving as the skin layer is good in heat resistance, stable in property at the temperature of smoke, capable of protecting and limiting the core layer, preventing the core layer from being heated and preventing other parts from being sticky and reducing the filtering effect of the filter tip, and the aluminum nitride loaded in the skin layer has good heat conductivity and can increase the heat conduction rate, meanwhile, the skin layer is of a porous structure, and not only can harmful substances in the smoke be adsorbed, but also the specific surface area of the whole modified cooling fiber is increased due to the porous structure, and the moisture absorption capacity of the modified cooling fiber is improved.

Further, the preparation method of the modified cooling fiber comprises the following steps:

preparing a polyimide spinning solution: respectively weighing rodlike nano calcium carbonate and nano aluminum nitride, adding the rodlike nano calcium carbonate and the nano aluminum nitride into a formic acid solution, performing ultrasonic dispersion to obtain a suspension, uniformly stirring and mixing N, N-dimethylformamide and N, N-dimethylacetamide to obtain a mixed solution I, weighing polyimide powder, adding the polyimide powder into the mixed solution I, stirring at the temperature of 50-65 ℃ until polyimide is completely dissolved, adding the suspension, continuously stirring for reacting for 1-2 hours, adding hexadecyl trimethyl ammonium bromide, continuously stirring for reacting for 12-14 hours, and performing ultrasonic dispersion for 20-24 hours to obtain a polyimide spinning solution;

preparing a core layer spinning solution: uniformly stirring and mixing N, N-dimethylformamide and dichloromethane to obtain a second mixed solvent, weighing polylactic acid powder, adding the polylactic acid powder into the second mixed solvent, stirring for 4-6 hours at the temperature of 50-60 ℃ to obtain a polylactic acid solution, adding chitin and tween-80 into the polylactic acid solution, and performing ultrasonic homogenization treatment to obtain a core layer spinning solution;

electrostatic spinning: carrying out coaxial electrostatic spinning on the PVC spinning solution and the nylon 66 spinning solution by using an electrostatic spinning machine to obtain composite fibers;

and (3) post-treatment: soaking the composite fiber in 20% hydrochloric acid solution, slowly stirring for 4-6h at a stirring speed of 30-50r/min, fishing out the composite fiber after the reaction is finished, washing the composite fiber with deionized water until the washing liquid is neutral, drying, and shearing to obtain the modified cooling fiber.

Further, the core layer is also loaded with heat-absorbing microcapsules.

Furthermore, the heat-absorbing microcapsule is prepared by taking paraffin hydrocarbon mixture as a capsule core and sodium alginate and gelatin mixture as a capsule shell by a complex coacervation method.

The core layer is loaded with the heat absorption microcapsules, so that the heat absorption performance of the modified cooling fibers can be further improved, and the flue gas can be cooled.

Furthermore, the plurality of vent holes are divided into one or more rows which are uniformly arranged along the circumference of the filter rod, and each row of vent holes are arranged on the same horizontal plane.

Further, the shortest distance between the vent holes and the acetate fiber section is 1-2mm, and the distance between two adjacent rows of vent holes is 0.8-1.5 mm.

Furthermore, the ventilation channels are multiple and are uniformly arranged on the outer surface of the special-shaped section.

Furthermore, the cross section of the ventilation channel is of a triangular structure.

Further, the depth dimension of the air-permeable channels is 1.6mm-2.4mm, and the total cross-sectional area of the air-permeable channels is 7.2mm²-16.8mm²。

Further, the length of the acetate fiber section is 7mm, and the length of the special-shaped section is 23 mm.

Further, the circumference size of the filter rod is 16-25 mm. In particular 16.8mm, 18.8mm, 21.85mm, 22.3mm or 24.0 mm.

Furthermore, the invention also discloses application of the composite filter tip rod in cigarettes or non-combustible cigarettes.

The invention has the beneficial effects that:

1. according to the composite cooling filter tip rod for heating non-combustible smoke, the cooling channel and the vent hole which are arranged in the special-shaped section are combined, and more air can be sucked into the filter tip by utilizing the Venturi effect, so that the effect of effectively reducing the temperature of smoke is achieved.

2. According to the composite cooling filter tip rod for heating non-combustible burning cigarettes, the moisture absorption cooling fiber bundles are arranged at the cooling channel, so that the cooling effect on smoke can be further improved, moisture in the smoke can be absorbed, and the sensory experience of the smoke is improved.

Drawings

FIG. 1 is a schematic structural view of a first embodiment of a composite cooling filter rod for heating non-combustible cigarettes according to the present invention;

FIG. 2 is a schematic structural view of a second embodiment of the composite temperature-reducing filter rod for heating non-combustible cigarettes according to the present invention;

wherein, the acetate fiber section 1, the special-shaped section 2, the cooling channel 3 and the vent hole 4.

Detailed Description

The present invention will be described in detail with reference to specific examples below:

example one

The invention relates to a composite cooling filter tip rod for heating non-combustible burning cigarettes, which comprises a filter element and forming paper wrapped outside the filter element, wherein the filter element comprises an acetate fiber section 1 and a special-shaped section 2 which are coaxially arranged, a plurality of cooling channels 3 are arranged on the outer surface of the special-shaped section 2, the cross section area of each cooling channel 3 is gradually reduced along the direction far away from a cigarette tobacco section, the cross section of each cooling channel 3 is of a triangular structure, the depth dimension of each cooling channel 3 is 1.6-2.4 mm, and the total cross section area of each cooling channel 3 is 7.2mm²-16.8mm²。

The forming paper is provided with a plurality of vent holes 4 at the corresponding positions of the special-shaped sections 2, the shapes of the vent holes 4 can be selected and set to be circular, oval, triangular and the like according to actual conditions, the vent holes 4 are positioned at one end close to the acetate fiber sections 1, the vent holes 4 are divided into one row or more than one row and are uniformly arranged along the circumference of the filter rod, each row of vent holes 4 are arranged on the same horizontal plane, the specific vent holes 4 are divided into two rows and are uniformly arranged along the circumference of the filter rod, the two rows of vent holes 4 are arranged in parallel, the two rows of suction holes can be arranged in order or in a staggered manner, the shortest distance between the vent holes 4 and the acetate fiber sections 1 is 1-2mm, and the distance between the two rows of vent holes 4 is 0.8-1.5 mm. The method comprises the following specific steps:

example two

As shown in fig. 2, the filter rod of the present embodiment is different from the first embodiment in that. The position of the cooling channel 3 is also provided with a moisture absorption cooling fiber bundle, the moisture absorption cooling fiber bundle is formed by twisting acetate fibers and modified cooling fibers, the modified cooling fibers take chitin/polylactic acid as a core layer, the outer wrapping polyimide is of a double-layer structure of a skin layer, aluminum nitride is loaded on the skin layer, and the skin layer is of a porous structure. The preparation of the moisture absorption and cooling fiber bundle comprises the following specific steps:

preparation of modified cooling fiber

Preparing a polyimide spinning solution: respectively weighing rodlike nano calcium carbonate and nano aluminum nitride according to the mass ratio of 1:2, adding the rodlike nano calcium carbonate and the nano aluminum nitride into a formic acid solution with the mass 10 times that of the nano aluminum nitride, obtaining suspension after ultrasonic dispersion, taking N, N-dimethylformamide and N, N-dimethylacetamide, stirring and mixing uniformly according to the volume ratio of 1:2 to obtain a mixed solution I, weighing polyimide powder, adding the polyimide powder into the mixed solution I, stirring at 50-65 deg.C until polyimide is completely dissolved, adding the suspension, stirring for reaction for 1-2 hr, adding cetyl trimethyl ammonium bromide, stirring for reaction for 12-14 hr, ultrasonic dispersing for 20-24 hr to obtain polyimide spinning solution containing 16% polyimide, wherein the mass ratio of the nano aluminum nitride to the polyimide to the hexadecyl trimethyl ammonium bromide is 0.04:12: 0.2.

Preparing a core layer spinning solution: uniformly stirring and mixing N, N-dimethylformamide and dichloromethane according to the volume ratio of 3:2 to obtain a second mixed solvent, weighing polylactic acid powder, adding the polylactic acid powder into the mixed solvent, stirring for 4-6 hours at the temperature of 50-60 ℃ to obtain a polylactic acid solution with the mass fraction of polylactic acid being 8%, adding chitin accounting for 8% of the mass of the polylactic acid and tween-80 accounting for 0.5% of the mass of the polylactic acid into the polylactic acid solution, and performing ultrasonic homogenization treatment to obtain a core layer spinning solution;

electrostatic spinning: pushing the polyimide spinning solution into an outer capillary of a coaxial electrostatic spinning nozzle, pushing the core layer spinning solution into the outer capillary of the coaxial electrostatic spinning nozzle, setting the technological parameter voltage of a spinning machine to be 30KV, setting the distance between the coaxial electrostatic spinning nozzle and a collecting plate to be 15cm, setting the feeding speeds of the spinning polyimide spinning solution and the core layer spinning solution to be 0.5ml/h, and carrying out coaxial electrostatic spinning on the polyimide spinning solution and the core layer spinning solution by using the electrostatic spinning machine to obtain a composite fiber;

and (3) post-treatment: soaking the composite fiber in 20% hydrochloric acid solution, slowly stirring for 4-6h at a stirring speed of 30-50r/min, fishing out the composite fiber after the reaction is finished, washing the composite fiber with deionized water until the washing liquid is neutral, drying, and shearing to obtain the modified cooling fiber.

After the conventional acetate fiber and the prepared modified cooling fiber are respectively finely opened by a feeding machine, the acetate fiber and the modified cooling fiber are twisted according to the ratio of 1:1, and the moisture-absorbing cooling fiber bundle is prepared.

EXAMPLE III

Compared with the two phases of the embodiment, the difference of the filter rod of the embodiment is that the core layer is also loaded with the heat-absorbing microcapsules, the heat-absorbing microcapsules are prepared by a complex coacervation method by taking paraffin hydrocarbon mixture as a capsule core and sodium alginate and gelatin mixture as a capsule shell, and the preparation of the heat-absorbing microcapsules is common in the prior art and is not described herein again. Namely, the difference lies in that a heat-absorbing microcapsule is added in the core layer spinning solution during preparation, and the preparation method specifically comprises the following steps:

preparing a core layer spinning solution: uniformly stirring and mixing N, N-dimethylformamide and dichloromethane according to the volume ratio of 3:2 to obtain a mixed solvent II, weighing polylactic acid powder, adding the polylactic acid powder into the mixed solvent, stirring for 4-6 hours at the temperature of 50-60 ℃ to obtain a polylactic acid solution with the mass fraction of polylactic acid of 8%, adding chitin accounting for 8% of the mass of the polylactic acid and tween-80 accounting for 0.5% of the mass of the polylactic acid into the polylactic acid solution, adding heat-absorbing microcapsules accounting for 0.3 times of the mass of the polylactic acid, and performing ultrasonic homogenization treatment to obtain a spinning core layer solution.

Comparative example 1

Compared with the first embodiment, the difference between the comparative example and the first embodiment is that the composite filter rod of the comparative example is not provided with the air-permeable channel, but only provided with the air suction holes.

The circumference of the composite filter rod prepared in the first embodiment to the third embodiment and the first comparative example may be 16-25mm, specifically 16.8mm, 18.8mm, 21.85mm, 22.3mm or 24.0mm, for convenience of performing a unified test, the circumference of the composite filter rod prepared in the first embodiment and the second comparative example is 24.00mm, and the composite filter rod prepared in the first embodiment to the third embodiment and the first comparative example is used for detecting the smoke cooling effect, and meanwhile, the existing conventional acetate fiber filter rod is used as a blank for comparison, and the detection method is as follows: respectively rolling the same mass of tobacco shreds into cigarettes, then respectively rolling the cigarettes with the composite filter rods together to prepare cigarette samples, adjusting the cigarette samples in a constant-temperature constant-humidity box with the temperature of 22 +/-1 ℃ and the relative humidity of 60 +/-3% for 48 hours under the regulation atmosphere condition specified in GB/T16447, then putting the cigarette samples on a linear smoking machine for smoking, wherein the smoking capacity is 35mL, the smoking time per mouth is 2s, one mouth is smoked per minute until the cigarette samples are burnt out, simultaneously placing a thermocouple at a position 1-2mm away from the end part of the composite filter rod for measuring the temperature before smoking, placing the thermocouple close to the center of the composite filter rod, and starting smoking after placing.

The results are shown in table 1:

TABLE 1

The above table shows that the composite filter tip rod prepared by the invention can effectively reduce the temperature of smoke through the synergistic effect of the vent holes and the cooling channel, so that a smoker can not feel hot, and the data comparison of the first embodiment to the third embodiment shows that the addition of the moisture absorption cooling fiber bundles and the heat absorption microcapsules can further increase the cooling effect on the smoke, and particularly under the synergistic effect of the moisture absorption cooling fiber bundles and the heat absorption microcapsules, the cooling effect is more obvious.

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims. The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.