CN114403501A

CN114403501A - Cooling fiber for cigarette filter tip and preparation method and application thereof

Info

Publication number: CN114403501A
Application number: CN202111569288.0A
Authority: CN
Inventors: 蔺翻红; 王泽理; 杜青霞; 黄乐平; 赵瑾朝; 何翠
Original assignee: Gansu Tobacco Industrial Co ltd; Wuhan Textile University
Current assignee: Gansu Tobacco Industrial Co ltd; Wuhan Textile University
Priority date: 2021-12-21
Filing date: 2021-12-21
Publication date: 2022-04-29

Abstract

The invention provides a cooling fiber for a cigarette filter, a preparation method thereof and application of the cooling fiber for the cigarette filter. The cooling fiber comprises fiber and a cooling layer coated on the surface of the fiber, wherein the cooling layer is formed by soaking or spraying a mixed solution on the surface of the fiber and drying the mixed solution; the mixed liquid comprises emulsion and a heat absorption and heat storage material, wherein the mass ratio of the emulsion to the heat absorption and heat storage material is 0.01-10: 0.01 to 10; the emulsion is formed by mixing crude oil and water, and comprises 1-10 wt% of crude oil and 10-99 wt% of water; the viscosity of the mixed liquid is 0.1-10.0 mPas. The cigarette filter tip made of the fibers can effectively reduce the smoke temperature, and meanwhile, the original processing technology and equipment of the cigarette filter tip fibers are not required to be changed in the preparation process, so that the cigarette filter tip fibers have the advantages of simplicity, convenience and high efficiency.

Description

Cooling fiber for cigarette filter tip and preparation method and application thereof

Technical Field

The invention belongs to the technical field of fibers, and particularly relates to a cooling fiber for a cigarette filter tip, and a preparation method and application thereof.

Background

During the smoking process of the conventional cigarette, the smoke at the inlet can reach 35-90 ℃, and the high temperature generates obvious hot, burning, spicy and stimulating feelings during smoking; meanwhile, the phenomenon of collapse and softening of the traditional fiber filter is easily caused by the excessively high smoke temperature. In the prior art, there are various means for cooling the smoke, such as adding a cooling section in the filter tip, wherein the cooling section is made of a phase-change material; or adding raw materials capable of lowering temperature into the filter, such as CN110710710A, by arranging a temperature lowering section formed by winding phase change material and diacetate fiber in the filter; CN112385880A reduces the steam in the flue gas through increasing the fibrous section that absorbs water in the filter, improves the flue gas taste. However, by adding the cooling section in the filter or adding the water-absorbing fiber section in the filter, the filter needs to be additionally reprocessed, and a new cooling section or a water-absorbing section is added, and a water-carrying capsule is added, so that the suction resistance is increased, the processing cost is increased, or the cooling effect per se is not good.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide the cooling fiber for the cigarette filter with excellent cooling effect. The cooling fiber for the cigarette filter can be further used for preparing the cigarette filter, and the formed filter can effectively reduce the smoke temperature and improve the comfort of the cigarette smoking process. The fiber prepared by the fiber can be directly applied to the cigarette filter fiber processing technology, the fiber does not need to further increase the step of eliminating static electricity, and does not need to add cooling particles in the filter or change the structure of the filter.

In order to achieve the purpose, the invention provides a cooling fiber for a cigarette filter, which comprises a fiber and a cooling layer coated on the surface of the fiber, wherein the cooling layer is formed by spraying a mixed solution on the surface of the fiber and drying the mixed solution; the mixed liquid comprises emulsion and a heat absorption and heat storage material, wherein the mass ratio of the emulsion to the heat absorption and heat storage material is 0.01-10: 0.01-10; the emulsion is formed by mixing crude oil and water, and comprises 1-10 wt% of crude oil and 10-99 wt% of water; the viscosity of the mixed liquid is 0.1-10.0mPa & s; the phase transition temperature of the cooling fiber is 30-50 ℃.

Further, the heat absorption heat storage material is a water-soluble phase change material including, but not limited to, polyethylene glycol (PEG), inorganic hydrated salt Na₂SO₄·10H₂O、CaBr₂·6H₂O、Zn(NO₃)₂·6H₂O、CaCl₂·4H₂One or more of O. For example, the heat absorption and storage material can be PEG with molecular weight in the range of 800-1500; for example, the medicinal PEG1000 and the PEG1500 are mixed according to the mass ratio of 6: 1.

Further, the viscosity of the mixed solution is preferably 0.1 to 5.0 mPas, more preferably 1.0 to 3.0 mPas.

Further, the fiber is acetate fiber, polypropylene fiber and the like

Further, it is preferable that the emulsion contains 4.4 wt% of crude oil and 95.6 wt% of water.

The invention also provides a preparation method of the cooling fiber for the cigarette filter, the emulsion prepared in the step (1) is prepared by mixing water and crude oil according to a formula, and stirring at a high speed for a period of time to obtain the emulsion; preparing a mixed solution, heating and melting a heat absorption and heat storage material, mixing the heat absorption and heat storage material with the emulsion prepared in the step (1), and stirring for a period of time to obtain a mixed solution; and (3) preparing cooling fibers, soaking or spraying the mixed liquor obtained in the step (2) on fiber tows, and drying to obtain the fiber.

Further, the heating temperature in the step (2) is 50-100 ℃, and can be selected according to the hot melting temperature of the phase-change material.

Further, the drying in the step (3) may be performed in an oven at a drying temperature of 50 to 100 ℃.

The invention also provides a cigarette filter, which is prepared from the cigarette filter cooling fibers, and the obtained cigarette filter can effectively reduce the smoke temperature of cigarettes and optimize the cigarette taste.

The invention has the beneficial effects that: (1) according to the invention, the phase-change material and the emulsion are mixed by selecting the water-soluble phase-change material and the emulsion, so that the phase-change material can be mixed with the emulsion to form a mixed solution, and the viscosity of the mixed solution is further selected, so that the mixed solution can be directly coated on the surface of the tows, the tows can obtain a cooling function, and the tows can be directly processed into cigarette filters without further static electricity elimination, so that the direct modification of the fibers by the phase-change material is realized, and the temperature of cigarette smoke can be reduced through a simple process; (2) the phase change temperature of the cooling fiber for the cigarette filter is 30-50 ℃, and the smoke temperature can be reduced to 30-50 ℃ by selecting the phase change material, so that the burning sensation of the smoke is reduced, and the smoking experience of the cigarette is improved; (3) the cigarette filter cooling fiber obtained by the invention is processed in the original process for preparing cigarettes without changing the original process flow, and has the advantages of simplicity, convenience and high efficiency compared with other cigarette filter cooling technologies.

Drawings

FIG. 1: photomicrographs of the fibers (left panel: example 1, right panel: comparative example 1).

FIG. 2: thermal image of the tow before and after treatment (example 1, sp 4; example 2, sp 6; comparative example 1, sp 7; comparative example 2, sp 5; comparative example 3, sp 2; comparative example 4, sp1)

FIG. 3: temperature-time profiles of the tows before and after treatment.

FIG. 4: the treated tow of example 1 and comparative example 1 were separately prepared into cigarette filters and the thermographic contrast profile during smoking.

Detailed Description

Example 1

(1) Formulating emulsions

Crude oil (purchased from Gulston corporation, usa, specification model PM15228) and deionized water were mixed in a mass ratio of 95.6:4.4, and stirred uniformly to obtain an emulsion.

(2) Preparing a mixed solution

Weighing 60g of medicinal PEG1000 and 10g of PEG1500, mixing, placing into an oven, processing at 50 ℃ for a period of time until the mixed PEG is in a molten state to obtain mixed PEG, mixing the emulsion prepared in the step (1) and the mixed PEG according to the mass ratio of 9:1, and stirring at room temperature for a certain time to obtain a mixed solution.

(3) Preparation of temperature-reducing fiber

Spraying the mixed solution obtained in the step (2) on diacetate tows; and drying the sprayed diacetate yarns in a drying oven at 100 ℃ to obtain the cooling fibers for the cigarette filter.

The phase transition temperature of the cooling fiber for the cigarette filter is 34.1 ℃ through DSC detection.

Example 2

Same as example 1, except that the emulsion: PEG 8: 2.

The phase transition temperature of the cooling fiber for the cigarette filter is 32.4 ℃ through DSC detection.

Example 3

The same as example 1 except that the endothermic heat storage material was PEG 1500.

The phase transition temperature of the cooling fiber for the cigarette filter is 45.4 ℃ through DSC detection.

Comparative example 1

Same as example 1, except that the emulsion: the mass ratio of PEG is 10:0

Comparative example 2

Same as example 1, except that the emulsion: the mass ratio of PEG is 6:4.

The phase transition temperature of the cooling fiber for the cigarette filter is 28.7 ℃ through DSC detection.

Comparative example 3

The same as example 1, except that PEG is medicinal PEG1000 (Xian Tian Zheng medicinal adjuvant Co., Ltd.).

The phase transition temperature of the cooling fiber for the cigarette filter is 27.3 ℃ through DSC detection.

Comparative example 4

The same as example 1, except that the PEG was PEG1500 (St. Makeda chemical Co., Ltd., Tianjin) and the phase transition temperature of the temperature reducing fiber for cigarette filters was 51.3 ℃ as measured by DSC.

Fiber detection

And (3) detecting the viscosity of the solution: the solution viscosity was measured using a rotational rheometer (Haake MARS, Thermo, America).

Surface topography detection: the surface topography of the samples was observed using a bench-top scanning electron microscope (800-.

Detecting phase change temperature and phase change enthalpy: using a differential scanning calorimeter (DSC200F3,

GmbH, Germany).

Thermal imaging photo taking: thermographic pictures were taken with a thermographer (FLIR E8-XT, FLIRSYSTEMS, America). 0.4g of the tow was cut to 1.5cm long and spread evenly in the locating holes of the hot plate (holes are square, size 1.5X 1.5 cm)²) The test temperature is 30-55 ℃. Example 1 is labeled sp 4; example 2 is labeled sp 6; example 3 is labeled sp 3; comparative example 1 is labeled sp 7; comparative example 2 is labeled sp 5; comparative example 3 is labeled sp 2; comparative example 4 is labeled sp 1.

Characterization of processability whether the tow can be further processed into a filter by a conventional processing method, the processing mark is good, and the non-processing mark is x.

Table 1 test results of examples

As can be seen from fig. 1, compared with the untreated phase change material (comparative example 1), the phase change material is obviously attached to the surface of the filament bundle treated by the phase change material added into the emulsion (example 1), and the adhesion performance is good. As shown in table 1, the viscosity of the treated tow of comparative example 2 was too high to prepare cigarette filters by subsequent processing, compared to the viscosity of the treated tow of examples 1-3. The viscosity of the strands after the treatment of examples 1-3 did not change significantly, compared to the treatment with the emulsion alone (comparative example 1), and all had lower viscosities ranging from 1.0 to 3.0 mPas. The tow with low viscosity is more suitable for the cigarette preparation process flow and has excellent processing performance. The addition of PEG to the emulsion treated tow, as measured by DSC, had phase change behavior as compared to the emulsion only treatment (comparative example 1). As shown in fig. 3 and 4, the tow treated with the PEG-containing mixed solution had a cooling effect, but the tow treated in comparative examples 3 and 4 had a cooling effect less pronounced than the tow treated in examples 1 to 3. As can be seen from Table 1, the phase transition temperatures of the treated tows of comparative examples 3 and 4 are respectively lower than 30 ℃ and higher than 50 ℃. Therefore, the temperature of the filament bundle is lowered to be lower or higher than the phase transition temperature. And preparing the treated tows into finished cigarettes, and taking thermal imaging photos of the finished cigarettes in a smoking process. As can be seen from fig. 4, the cigarette filter prepared in (example 1) has a significant cooling effect and can reduce the smoke temperature by 7-8 ℃ compared with the cigarette filter prepared from the tow (comparative example 1) which is not treated with the phase change material. Therefore, the tows treated by the technical scheme of the invention have processability and excellent cooling effect.

Claims

1. The utility model provides a cigarette is cooling fibre for filter tip which characterized in that: the cooling layer is formed by spraying mixed liquor on the surface of the fiber and drying; the mixed liquid comprises emulsion and a heat absorption and heat storage material, wherein the mass ratio of the emulsion to the heat absorption and heat storage material is 0.01-10: 0.01-10; the emulsion is formed by mixing crude oil and water, and comprises 1-10 wt% of crude oil and 10-99 wt% of water; the viscosity of the mixed liquid is 0.1-10.0mPa & s; the phase transition temperature of the cooling fiber is 30-50 ℃.

2. The cooling fiber for cigarette filters according to claim 1, wherein: the crude oil content in the emulsion was 4.4 wt%, and the water content was 95.6 wt%.

3. The cooling fiber for cigarette filters according to claim 1, wherein: the viscosity of the mixed liquid is 1.0-3.0 mPas.

4. The cooling fiber for cigarette filters according to claim 1, wherein: the heat absorption and storage material is a water-soluble phase-change material.

5. The cooling fiber for cigarette filters according to claim 4, wherein: the water-soluble phase-change material is selected from polyethylene glycol (PEG) and Na₂SO₄·10H₂O、CaBr₂·6H₂O、Zn(NO₃)₂·6H₂O、CaCl₂·4H₂One or more of O.

6. The cooling fiber for cigarette filters according to claim 3, wherein: the heat absorption and heat storage material is PEG with the molecular weight of 800-1500; more preferably, the medicinal PEG1000 and the PEG1500 are mixed according to the mass ratio of 6: 1.

7. The cooling fiber for cigarette filters according to claim 1, wherein: the fiber is acetate fiber or polypropylene fiber.

8. A method for preparing a cooling fiber for a cigarette filter according to any one of claims 1 to 7, wherein: preparing emulsion, namely mixing the water-base oil according to a formula, and stirring at a high speed for a period of time to obtain the emulsion; preparing a mixed solution, heating and melting a heat absorption and heat storage material, mixing the heat absorption and heat storage material with the emulsion prepared in the step (1), and stirring for a period of time to obtain a mixed solution; and (3) dipping or spraying the mixed liquor obtained in the step (2) on the fiber tows, and drying to obtain the fiber tow.

9. The preparation method of the cooling fiber for the cigarette filter according to claim 8, wherein the preparation method comprises the following steps: the heating temperature in the step (2) is 50-100 ℃; the drying temperature in the step (3) is 50-120 ℃.

10. A cigarette filter characterized by: comprising the cooling fiber for cigarette filters according to any one of claims 1 to 7.