Method for manufacturing filter tip fragrant thread by using sisal fibers

Abstract

The invention provides a method for manufacturing a filter tip fragrant thread by using sisal fibers. The method comprises the following steps: (1) pretreating the sisal fibers to form a core thread; (2) preparing a modified solution by using nano silicon dioxide; (3) soaking the core wire in the modification liquid, performing ultrasonic oscillation, and drying to obtain the core wire after preliminary modification treatment; (4) spraying or dip-coating tobacco essence or tobacco balsam on the core wire subjected to the primary modification treatment, and drying to obtain the core wire subjected to fragrance preparation; and (5) soaking the core wire subjected to fragrance preparation into the modification liquid, taking out the core wire after soaking is completed, drying and twisting to obtain the filter tip fragrant wire. The sisal hemp short fibers are applied to the tobacco industry with high added value, and sustainable development of the sisal hemp industry is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of sisal fiber application, in particular to a method for making filter tip incense threads by utilizing sisal fibers. Background Art

[0002] Filter tip flavor wire is a core wire added to the cigarette filter, usually made of plant fiber. Its main functions include: (1) enhancing flavor and moisturizing, improving the taste of cigarettes; (2) changing the path of mainstream smoke, making the smoke smoother; (3) absorbing some harmful substances in the smoke, including tar, CO, etc., to reduce the negative impact of harmful substances on the human body.

[0003] Sisal fiber is taken from the leaf part of sisal, a perennial tropical hard leaf fiber crop. It is white in color, tough in texture, strong and tensile, corrosion-resistant, and non-slip. It is mostly used in the textile industry and in the production of ropes, fishing nets, etc. However, the above applications mostly prefer to use long fibers, and the value of sisal short fibers is very small. If the utilization value of sisal short fibers can be fully explored, it will be conducive to the sustainable development of the sisal industry. Summary of the Invention

[0004] The present invention provides a method for producing filter tip incense thread by utilizing sisal fibers, and applies the sisal short fibers in the high value-added tobacco industry, which is beneficial to the sustainable development of the sisal industry.

[0005] To achieve the above object, the technical solution of the present invention is: A method for making a filter tip incense thread using sisal fiber, comprising the following steps: (1) Pretreatment of sisal fiber: Take short sisal fibers and soak them in bamboo vinegar solution with a concentration of 30-50 g / L for 2-3 hours. Then, add sodium bicarbonate under ultrasonic oscillation until no more bubbles are generated. The oscillation time is 2-4 minutes. After the treatment, clean them, dry them, and twist them into core yarns. (2) Preparation of modified solution: Add nano-silica to a 0.2-0.5 wt% sodium alginate solution which is 5-8 times its weight, then add 1-2 wt% of its weight of silane coupling agent KH560, stir and react at 55-60°C for 2-3 hours to obtain a modified nano-silica dispersion, then add 0.5-0.7 wt% chitosan solution to the modified nano-silica dispersion, stir evenly, and adjust the pH value of the system to 6-6.5 to obtain a modified solution; (3) Soaking the core wire in the modification liquid, ultrasonically oscillating it, and drying it after the oscillation is completed. Repeating the above soaking and drying process 1-3 times to obtain the core wire after preliminary modification; (4) spraying or dipping the core wire after the preliminary modification treatment with tobacco flavoring essence or tobacco flavoring liquid, and drying it to obtain a flavored core wire; (5) Soaking the scented core thread in the modified liquid again, taking it out after soaking, drying it, and twisting it to obtain the filter tip scent thread.

[0006] Preferably, in step (1), the weight of the bamboo vinegar is 20-30 times that of the sisal staple fibers.

[0007] Preferably, in step (2), the volume ratio of the modified nano-silica dispersion to the chitosan solution is 85-95:5-15.

[0008] Preferably, in step (3), the power of ultrasonic oscillation is 70-80 kHz, and the oscillation time is 30-40 min.

[0009] Preferably, in step (3), the weight of the modifying liquid is 20-30 times the weight of the core wire.

[0010] Preferably, in step (5), the soaking time is 5-10 minutes.

[0011] Preferably, in step (5), the weight of the modified liquid is 10-12 times the weight of the scented core wire.

[0012] Preferably, in step (3), step (4) and step (5), the drying temperature does not exceed 40°C.

[0013] Preferably, in step (2), an acidic pH regulator is added to the sodium alginate solution, such as acetic acid or bamboo vinegar.

[0014] (1) The present invention makes full use of the rich pores and excellent oil absorption performance of sisal fiber, and modifies it to make filter tip incense thread, thereby improving the ability of the incense thread to absorb harmful substances such as tar.

[0015] (2) The present invention soaks the sisal staple fibers with bamboo vinegar, which can, on the one hand, disinfect the sisal staple fibers, and on the other hand, remove the wax on the surface of the sisal staple fibers in combination with sodium bicarbonate, thereby increasing the permeability of the pores and making the fibers have better adsorption and sustained-release properties.

[0016] (3) The present invention further soaks the core wire with a modification liquid. After the surface functional groups of the nano-silicon dioxide in the modification liquid are modified, the nano-silicon dioxide can be better dispersed into the modification liquid system and form a cross-linked network structure. Then, the nano-silicon dioxide can penetrate into the pore structure of the core wire and cross-link with the surface functional groups of the core wire. The nano-silicon dioxide exists more stably in the core wire and works together with the core wire to exert adsorption and sustained-release properties, thereby prolonging the time of aroma release and better adsorbing harmful substances such as tar. DETAILED DESCRIPTION

[0017] The present invention will be further described below with reference to specific examples, but the protection scope of the present invention is not limited to the following examples. Example 1

[0018] A method for making a filter tip incense thread using sisal fiber, comprising the following steps: (1) Pretreatment of sisal fiber: Take sisal staple fibers and soak them in bamboo vinegar with a concentration of 45g / L for 2.5h. The weight of bamboo vinegar is 25 times that of sisal staple fibers. Then, add sodium bicarbonate under ultrasonic oscillation until no more bubbles are generated. The oscillation time is 3min and the oscillation power is 70kHz. After treatment, clean it, air-dry it at 35℃, and twist it into a core yarn.

[0019] (2) Preparation of modified solution: Add nano-silica to 0.3 wt% sodium alginate solution which is 8 times of its weight, then add 1.5 wt% of silane coupling agent KH560, and stir the mixture at 60°C for 2 h to obtain modified nano-silica dispersion. Then add 0.6 wt% chitosan solution to the modified nano-silica dispersion. The volume ratio of the modified nano-silica dispersion to the chitosan solution is 85:15. Stir evenly and adjust the pH value of the system to 6.3 to obtain modified solution.

[0020] (3) Soak the core wire in a modification liquid with a weight of 25 times the weight of the core wire, and ultrasonically oscillate with an oscillation power of 80kHz. After the oscillation is completed, dry it. Repeat the above soaking and drying process twice to obtain the core wire after preliminary modification.

[0021] (4) Spray or dip the core wire after the preliminary modification treatment with tobacco flavoring or tobacco flavoring liquid, and dry it to obtain the flavored core wire.

[0022] (5) Soak the scented core thread in a modified liquid. The weight of the modified liquid is 10 times the weight of the scented core thread. The soaking time is 8 minutes. After soaking, take it out, dry it, and twist it to obtain the filter tip scent thread.

[0023] In step (3), step (4) and step (5), the drying temperature is 35° C. and air drying is performed. Example 2

[0024] A method for making a filter tip incense thread using sisal fiber, comprising the following steps: (1) Pretreatment of sisal fiber: Take sisal staple fibers and soak them in bamboo vinegar with a concentration of 30 g / L for 3 h. The weight of bamboo vinegar is 20 times that of sisal staple fibers. Then, add sodium bicarbonate under ultrasonic oscillation until no more bubbles are generated. The oscillation time is 4 min and the oscillation power is 70 kHz. After treatment, clean it, air-dry it at 40 °C, and twist it into a core yarn.

[0025] (2) Preparation of modified solution: Add nano-silica to a 0.2 wt% sodium alginate solution which is 6 times its weight, and then add 2 wt% of its weight of silane coupling agent KH560, and stir the reaction at 60 °C for 2 h to obtain a modified nano-silica dispersion. Then, add 0.7 wt% chitosan solution to the modified nano-silica dispersion, and the volume ratio of the modified nano-silica dispersion to the chitosan solution is 95:5. Stir evenly and adjust the pH value of the system to 6.5 to obtain a modified solution.

[0026] (3) Soak the core wire in a modification liquid with a weight of 20 times the weight of the core wire, and ultrasonically oscillate with an oscillation power of 70kHz. After the oscillation is completed, dry it. Repeat the above soaking and drying process twice to obtain the core wire after preliminary modification.

[0027] (4) Spray or dip the core wire after the preliminary modification treatment with tobacco flavoring or tobacco flavoring liquid, and dry it to obtain the flavored core wire.

[0028] (5) Soak the scented core thread in a modified liquid. The weight of the modified liquid is 12 times the weight of the scented core thread. The soaking time is 5 minutes. After soaking, take it out, dry it, and twist it to obtain the filter tip scent thread.

[0029] In step (3), step (4) and step (5), the drying temperature is 38° C. and air drying is performed. Example 3

[0030] A method for making a filter tip incense thread using sisal fiber, comprising the following steps: (1) Pretreatment of sisal fiber: Take sisal staple fibers and soak them in bamboo vinegar with a concentration of 50 g / L for 2 h. The weight of bamboo vinegar is 20 times that of sisal staple fibers. Then, add sodium bicarbonate under ultrasonic oscillation until no bubbles are generated. The oscillation time is 4 min and the oscillation power is 70 kHz. After treatment, clean them, air-dry them at 40 °C, and twist them into core yarns.

[0031] (2) Preparation of modified solution: Add nano-silica to a 0.5 wt% sodium alginate solution which is 5 times its weight, then add 1 wt% of its weight of silane coupling agent KH560, and stir the mixture at 60°C for 2 h to obtain a modified nano-silica dispersion. Then, add 0.5 wt% chitosan solution to the modified nano-silica dispersion. The volume ratio of the modified nano-silica dispersion to the chitosan solution is 90:10. Stir evenly and adjust the pH value of the system to 6.5 to obtain a modified solution.

[0032] (3) Soak the core wire in a modification liquid with a weight of 20 times the weight of the core wire, and ultrasonically oscillate with an oscillation power of 80kHz. After the oscillation is completed, dry it. Repeat the above soaking and drying process twice to obtain the core wire after preliminary modification.

[0033] (4) Spray or dip the core wire after the preliminary modification treatment with tobacco flavoring or tobacco flavoring liquid, and dry it to obtain the flavored core wire.

[0034] (5) Soak the scented core thread in a modified liquid. The weight of the modified liquid is 12 times the weight of the scented core thread. The soaking time is 5 minutes. After soaking, take it out, dry it, and twist it to obtain the filter tip scent thread.

[0035] In step (3), step (4) and step (5), the drying temperature is 38° C. and air drying is performed.

[0036] Comparative Example 1 Comparative Example 1 is substantially the same as Example 1, but in step (1), the sisal staple fibers are soaked in 20 g / L hydrochloric acid for 2.5 h.

[0037] Comparative Example 2 Compared with Example 1, the preparation method of the modified liquid in Comparative Example 2 is different, specifically: 0.3wt% sodium alginate solution and 0.6wt% chitosan solution are mixed in a volume ratio of 85:15, stirred evenly, and the pH value of the system is adjusted to 6.3 to obtain a modified liquid.

[0038] In the above embodiments and comparative examples, the twisting method refers to the existing technology, the sisal staple fibers are spun into single yarns through a spinning system, 10 single yarns are combined and twisted to form ply yarns, and finally 20 ply yarns are further combined and twisted to obtain the obtained yarns.

[0039] The filter incense wires prepared in the above examples and comparative examples were implanted into the filter tips, and a blank control (no filter incense wire implanted) was set up for smoke analysis and sensory evaluation. The smoke analysis used a smoke trap to introduce the mainstream cigarette smoke into a collection device to obtain a standardized smoke sample, and then analyzed some of the components therein, as shown in Tables 1 and 2.

[0040]

[0041]

Claims

1. A method for making filter tip incense thread using sisal fiber, characterized in that The following steps are involved: (1) Pretreatment of sisal fiber: Take short sisal fibers and soak them in bamboo vinegar solution with a concentration of 30-50 g / L for 2-3 hours. Then, add sodium bicarbonate under ultrasonic oscillation until no more bubbles are generated. The oscillation time is 2-4 minutes. After the treatment, clean them, dry them, and twist them into core yarns. (2) Preparation of modified solution: Add nano-silica to a 0.2-0.5 wt% sodium alginate solution which is 5-8 times its weight, then add 1-2 wt% of its weight of silane coupling agent KH560, stir and react at 55-60°C for 2-3 hours to obtain a modified nano-silica dispersion, then add 0.5-0.7 wt% chitosan solution to the modified nano-silica dispersion, stir evenly, and adjust the pH value of the system to 6-6.5 to obtain a modified solution; (3) Soaking the core wire in the modification liquid, ultrasonically oscillating it, and drying it after the oscillation is completed. Repeating the above soaking and drying process 1-3 times to obtain the core wire after preliminary modification; (4) spraying or dipping the core wire after the preliminary modification treatment with tobacco flavoring essence or tobacco flavoring liquid, and drying it to obtain a flavored core wire; (5) Soaking the scented core thread in the modified liquid again, taking it out after soaking, drying it, and twisting it to obtain the filter tip scent thread.

2. The method for making filter tip incense thread using sisal fiber according to claim 1, characterized in that: In step (1), the weight of the bamboo vinegar liquid is 20-30 times that of the sisal staple fibers.

3. The method for making filter incense thread using sisal fiber according to claim 1, characterized in that: In step (2), the volume ratio of the modified nano-silica dispersion to the chitosan solution is 85-95:5-15.

4. The method for producing a filter tip incense string using sisal fiber according to claim 1, wherein: In step (3), the power of ultrasonic oscillation is 70-80 kHz, and the oscillation time is 30-40 min.

5. The method for making filter incense string using sisal fiber according to claim 1, characterized in that: In step (3), the weight of the modifying liquid is 20-30 times the weight of the core wire.

6. The method for making filter incense string using sisal fiber according to claim 1, characterized in that: In step (5), the soaking time is 5-10 minutes.

7. The method for making filter incense string using sisal fiber according to claim 1, characterized in that: In step (5), the weight of the modified liquid is 10-12 times the weight of the core wire after fragrance addition.

8. The method for making filter incense string using sisal fiber according to claim 1, characterized in that: In step (3), step (4) and step (5), the drying temperature does not exceed 40°C.

9. The method for making filter incense string using sisal fiber according to claim 1, characterized in that: In step (2), an acidic pH regulator is added to the sodium alginate solution.

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