Preparation method of electronic cigarette guide oil cotton

Abstract

The application discloses a preparation method of electronic cigarette oil guide cotton. The method comprises the following steps: taking organic polymer chip as raw material, adding a predetermined amount of mixed reagent of inorganic antibacterial agent and organic antibacterial agent, uniformly mixing, and then preparing organic short fibers with special-shaped structure through melt spinning; mixing the inorganic fibers and the organic short fibers in a predetermined proportion, and preparing the oil guide cotton through carding, water jet, and winding. By combining the advantages of high polymer materials such as polyester and polytetrafluoroethylene, such as high melting point and decomposition temperature, and the advantages of inorganic fibers such as ceramic fibers, such as light weight, high temperature resistance and good thermal stability, and by controlling the use proportion of the two, the oil guide cotton can have good heat resistance, thermal stability and high oil conductivity, and carbonization can be avoided during use, thereby prolonging the service life of the electronic cigarette.

Description

Technical Field

[0001] This invention relates to the field of electronic cigarette technology, and in particular to a method for preparing an electronic cigarette wicking cotton. Background Technology

[0002] Electronic cigarettes, also known as virtual cigarettes or e-cigarettes, have the same appearance and flavor as traditional cigarettes, even offering a wider variety of flavors. They produce smoke, flavor, and sensations just like cigarettes. However, because the wicking material in e-cigarettes is primarily composed of natural cotton fibers, the wick gradually carbonizes with repeated use, generating harmful substances that can damage health upon reuse. Furthermore, traditional wicking materials suffer from slow wicking rates, low e-liquid storage rates, and poor thermal stability, significantly limiting the widespread use of e-cigarettes.

[0003] In the prior art, patent CN 105747277 B discloses an wicking cotton for electronic cigarettes and its preparation method. The raw material components of the wicking cotton include plant charcoal micropowder, specifically bamboo charcoal micropowder. The preparation method includes a step of using plant charcoal micropowder as a raw material, specifically bamboo charcoal micropowder. The wicking cotton provided by the above solution has a microporous and honeycomb structure, and its oil absorption performance can reach 6-10 times that of wicking cotton prepared from existing cotton fibers. Furthermore, the prepared wicking cotton can absorb and release e-liquid more quickly, effectively preventing the atomizer from burning dry without oil. However, although this method improves the absorption and release of e-liquid and its antibacterial effect, the plant charcoal micropowder added during the preparation process must be pure; otherwise, it will affect the final product's performance. This operation is difficult to achieve in practice, and the process is cumbersome, time-consuming, and labor-intensive, making it unsuitable for industrialization.

[0004] In view of this, it is necessary to design a method for preparing oil-wicking cotton for electronic cigarettes in order to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a method for preparing an oil-wicking cotton for electronic cigarettes, which uses polymer materials such as polyester and polytetrafluoroethylene and inorganic fibers such as ceramic fibers as the main raw materials, and adds a certain amount of inorganic antibacterial agents and organic antibacterial agents, and is prepared by melt spinning to obtain an oil-wicking cotton with a heterogeneous structure, good heat resistance, high oil conductivity and oil storage rate, and antibacterial effect.

[0006] To achieve the above-mentioned objectives, this invention provides a method for preparing wicking cotton for electronic cigarettes, comprising the following steps:

[0007] S1. Using organic polymer chips as raw materials, a predetermined amount of inorganic antibacterial agent and organic antibacterial agent mixture is added, and after uniform mixing, organic short fibers with irregular structures are prepared by melt spinning.

[0008] S2. After the inorganic fibers and the organic short fibers prepared in step S1 are mixed evenly in a predetermined ratio, the mixture is carded and laid into a web, and then hydroentangled to obtain a nonwoven fabric.

[0009] S3. The nonwoven fabric prepared in step S2 is wound to obtain oil-wicking cotton.

[0010] As a further improvement of the present invention, in step S1, the melting point temperature of the organic polymer slices is ≥230℃ and the decomposition temperature is ≥300℃.

[0011] As a further improvement of the present invention, in step S2, the melting point temperature of the inorganic fiber is ≥2000℃.

[0012] As a further improvement of the present invention, in step S2, the mass ratio of the inorganic fiber to the organic short fiber is 1:9-9:1.

[0013] As a further improvement of the present invention, in step S1, the inorganic antibacterial agent includes one of silver, copper, silver molybdate, and copper molybdate.

[0014] As a further improvement of the present invention, in step S1, the organic antibacterial agent includes one of acylaniline, triple-chain quaternary ammonium salt and phenol.

[0015] As a further improvement of the present invention, in step S1, the mass ratio of the inorganic antibacterial agent to the organic antibacterial agent is 5:5-9:1.

[0016] As a further improvement of the present invention, in step S1, the amount of the mixed reagent of inorganic antibacterial agent and organic antibacterial agent added is 1wt%-5wt%.

[0017] As a further improvement of the present invention, in step S1, the irregular structure includes one of the following: grid-shaped, rice-shaped, and peanut-shaped.

[0018] As a further improvement of the present invention, in step S1, the melt spinning processing temperature is 320-350℃ and the spinning speed is 3000-4000m / min.

[0019] The beneficial effects of this invention are:

[0020] 1. This invention uses polymer chips such as polyester and polytetrafluoroethylene and inorganic fibers such as ceramic fibers as the main raw materials. It combines the advantages of high melting point and decomposition temperature of polymer materials such as polyester and polytetrafluoroethylene with the advantages of light weight, high temperature resistance and good thermal stability of inorganic fibers such as ceramic fibers. By controlling the ratio of the two materials, an oil-wicking cotton with good heat resistance, thermal stability and high oil conductivity can be prepared. It can also avoid carbonization during use, thus extending the service life of electronic cigarettes.

[0021] 2. This invention prepares an oil-wicking cotton with an irregular structure through melt spinning. Compared with traditional unidirectional oil-wicking, its oil-wicking rate and oil absorption rate are significantly improved. Compared with traditional e-cigarette oil-wicking cotton, the oil-wicking rate is increased by 200%, and the oil storage rate is increased by 150%. Furthermore, the e-cigarette provides a more pleasant taste during actual use, thus enhancing the user's mood. In addition, this invention imparts antibacterial properties to the oil-wicking cotton by adding a certain amount of organic and inorganic antibacterial agents during the preparation process, overcoming the shortcoming of weak antibacterial effects in e-cigarettes. Simultaneously, the amount and ratio of organic and inorganic antibacterial agents added are limited, ensuring both antibacterial effect and, to a certain extent, effective excretion of antibacterial agents, avoiding chronic poisoning caused by excessive accumulation of antibacterial agents in the body. It also reduces environmental pollution from antibacterial agent emissions. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to specific embodiments.

[0023] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0024] This invention provides a method for preparing wicking cotton for electronic cigarettes, comprising the following steps:

[0025] S1. Using organic polymer chips as raw materials, add 1wt%-5wt% of a mixture of inorganic and organic antibacterial agents, comb and integrate them, and then prepare organic short fibers with irregular structures by melt spinning.

[0026] S2. After mixing the inorganic fibers at a predetermined mass ratio with the organic short fibers prepared in step S1 evenly, the mixture is carded to make cotton slivers, and then hydroentangled to obtain nonwoven fabric.

[0027] S3. The nonwoven fabric prepared in step S2 is wound to obtain oil-wicking cotton.

[0028] Specifically, in step S1, the organic polymer chips have a melting point temperature ≥230℃ and a decomposition temperature ≥300℃; preferably, the organic polymer chips are polyester or polytetrafluoroethylene.

[0029] Specifically, in step S2, the melting point temperature of the inorganic fiber is ≥2000℃; preferably, the inorganic fiber is ceramic fiber.

[0030] Specifically, in step S2, the ratio of inorganic fibers to organic short fibers is 1:9-9:1; preferably, the ratio of inorganic fibers to organic short fibers is 3:7-7:3.

[0031] Specifically, in step S1, the inorganic antibacterial agent includes one of silver, copper, silver molybdate, and copper molybdate; the organic antibacterial agent includes one of acylaniline, triple-chain quaternary ammonium salt, and phenol; the mass ratio of the inorganic antibacterial agent to the organic antibacterial agent is 5:5-9:1.

[0032] Specifically, in step S1, the irregular structure includes one of the following: grid-shaped, star-shaped, and peanut-shaped; the melt spinning processing temperature is 320-350℃, and the spinning speed is 3000-4000m / min.

[0033] The preparation method of the electronic cigarette wicking cotton provided by the present invention will be described below with reference to specific embodiments.

[0034] Example 1

[0035] This embodiment provides a method for preparing oil-wicking cotton for electronic cigarettes, including the following steps:

[0036] S1. Using polyester as raw material, add 1 wt% of a mixture of silver molybdate and triple-chain quaternary ammonium salt, wherein the mass ratio of silver molybdate to triple-chain quaternary ammonium salt is 6:4; after combing and integration, obtain grid-shaped organic short fibers by melt spinning, wherein the melt spinning processing temperature is 320℃ and the spinning speed is 3000m / min;

[0037] S2. After uniformly mixing ceramic fibers at a mass ratio of 6:4 with the organic short fibers prepared in step S1, the mixture is carded to form cotton slivers, and then hydroentangled to obtain nonwoven fabric, wherein the hydroentanglement pressure is 1*10. 7 Pa;

[0038] S3. The nonwoven fabric prepared in step S2 is wound to obtain oil-wicking cotton.

[0039] Examples 2-9

[0040] Examples 2-9 provide a method for preparing wicking cotton for electronic cigarettes. Compared with Example 1, the mass ratio of ceramic fiber to short machined fiber in Examples 2-9 is adjusted to 5:5, 7:3, 8:2, 9:1, 1:9, 2:8, 3:7, and 4:6, respectively. The remaining steps are the same as in Example 1 and will not be repeated here.

[0041] Comparative Examples 1-2

[0042] Comparative Example 1 provides a method for preparing wicking cotton for electronic cigarettes. Pure cotton is used as raw material, and after carding and integrating, fibers are obtained through melt spinning. The melt spinning process temperature is 320℃, and the spinning speed is 3000 m / min. Finally, the cotton is carded to form cotton slivers, which are then hydroentangled to obtain a nonwoven fabric. The hydroentanglement pressure is 1*10. 7 Pa. Compared with Comparative Example 1, Comparative Example 2 uses pure cotton as raw material, and after combing and integrating, it prepares "well" shaped fibers through melt spinning. The remaining steps are the same as those in Comparative Example 1, and will not be repeated here.

[0043] The oil conductivity, oil storage rate, antibacterial effect and carbonization degree of the e-cigarette oil-wicking cotton prepared in Examples 1-9 and Comparative Examples 1-2 were tested, and the test results are shown in Table 1.

[0044] Table 1 Performance test results of the e-cigarette wicking cotton prepared in Examples 1-9 and Comparative Examples 1-2

[0045]

[0046] As shown in Table 1, the oil conductivity and oil retention rate of the oil-wicking cotton gradually increase with the increase of the proportion of organic short fibers, while the percentage of mass loss, i.e., the degree of carbonization, gradually decreases with the increase of the proportion of ceramic fibers. The oil-wicking cotton exhibits the best oil conductivity and oil retention effect when the ratio of ceramic fibers to organic short fibers fluctuates within the range of 4:6 to 3:7. However, when the ratio of ceramic fibers to organic short fibers is less than 3:7, the oil conductivity and oil retention rate of the oil-wicking cotton gradually decrease, while the degree of carbonization intensifies. Furthermore, the oil-wicking cotton prepared in Examples 1-9 all achieved a mortality rate of 85% for Staphylococcus aureus AATCC 6538. Compared to Example 1, the oil conductivity and oil retention rate of the oil-wicking cotton prepared in Comparative Examples 1 and 2 were significantly reduced, and they were almost completely carbonized.

[0047] In summary, the method for preparing the e-cigarette wicking cotton disclosed in this invention uses polymer materials such as polyester and polytetrafluoroethylene (PTFE) and inorganic fibers such as ceramic fibers as the main raw materials. It combines the advantages of high melting points and decomposition temperatures of polymer materials such as polyester and PTFE with the advantages of lightweight, high-temperature resistance, and good thermal stability of inorganic fibers such as ceramic fibers. By controlling the ratio of the two materials, an e-cigarette wicking cotton with good heat resistance, thermal stability, and high oil conductivity is prepared, which avoids carbonization during use, thus extending the lifespan of the e-cigarette. Furthermore, the e-cigarette wicking cotton with an irregular structure prepared by melt spinning significantly improves the oil conduction rate and oil absorption rate compared to traditional unidirectional oil conduction cotton. Compared to traditional e-cigarette wicking cotton, the oil conductivity is increased by 200%, and the oil storage rate is increased by 150%. Moreover, this e-cigarette provides a more comfortable taste during actual use, thus enhancing the user's experience. Furthermore, by adding a certain amount of organic and inorganic antibacterial agents during the preparation process, this invention endows the oil-wicking cotton with antibacterial properties, thus overcoming the shortcoming that electronic cigarettes do not have a significant bactericidal and antiviral effect during inhalation.

[0048] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A method for preparing wicking cotton for electronic cigarettes, characterized in that, Includes the following steps: S1. Using organic polymer chips as raw material, a predetermined amount of a mixture of inorganic and organic antibacterial agents is added. After uniform mixing, organic short fibers with irregular structures are prepared by melt spinning. The organic polymer chips have a melting point temperature ≥230℃ and a decomposition temperature ≥300℃. The organic polymer chips are polyester. The inorganic antibacterial agent includes one of silver, copper, silver molybdate, and copper molybdate. The organic antibacterial agent includes one of amides, triple-chain quaternary ammonium salts, and phenols. The irregular structure includes one of grid-shaped, star-shaped, and peanut-shaped structures. S2. After the inorganic fibers and the organic short fibers prepared in step S1 are mixed evenly in a predetermined ratio, the mixture is carded and laid into a web, and then hydroentangled to obtain a nonwoven fabric. The inorganic fiber has a melting point temperature ≥2000℃; the mass ratio of the inorganic fiber to the organic short fiber is 3:7-4:6; the inorganic fiber is a ceramic fiber. S3. The nonwoven fabric prepared in step S2 is wound to obtain oil-wicking cotton.

2. The method for preparing the electronic cigarette wicking cotton according to claim 1, characterized in that: In step S1, the mass ratio of the inorganic antibacterial agent to the organic antibacterial agent is 5:5-9:

1.

3. The method for preparing the electronic cigarette wicking cotton according to claim 1, characterized in that: In step S1, the amount of the mixed reagent of inorganic antibacterial agent and organic antibacterial agent added is 1wt%-5wt%.

4. The method for preparing the electronic cigarette wicking cotton according to claim 1, characterized in that: In step S1, the melt spinning temperature is 320-350℃ and the spinning speed is 3000-4000m / min.

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