阅读说明：本技术 提高再造烟叶涂布率工艺 (Process for improving spreading rate of reconstituted tobacco ) 是由 喻世涛 程璇 王浩 韩鹏 唐天明 周丽 王晚霞 于 2019-10-12 设计创作，主要内容包括：本发明提供一种提高再造烟叶涂布率工艺,包括将烟梗、烟末、次级烟叶的总混合物中加水,经提取、固液分离得到不溶物和提取液,将所得不溶物制成基片；将所得提取液经过滤、浓缩至固含量达到45％-60％,得到浓缩液,向浓缩液中加入烟用香精,均匀得到涂布液,将涂布液经加装超声波发射头的涂布液槽,通过超声波发生控制系统,将上述制成的基片进行双面涂布,经双面涂布后的基片经过一次干燥、切片、二次干燥后制备成再造烟叶成品。本发明所述工艺节能环保,利用超声波的机械效应、空化作用和热效应,提高再造烟叶的涂布率,避免涂布液中致香性成分的损失,提升再造烟叶的感官质量。(The invention provides a process for improving the spreading rate of reconstituted tobacco, which comprises the steps of adding water into a total mixture of tobacco stems, tobacco powder and secondary tobacco leaves, extracting and carrying out solid-liquid separation to obtain insoluble substances and an extracting solution, and preparing the obtained insoluble substances into a substrate; filtering and concentrating the obtained extracting solution until the solid content reaches 45% -60% to obtain a concentrated solution, adding essence for cigarettes into the concentrated solution to obtain a coating liquid uniformly, coating the coating liquid in a coating liquid tank with an ultrasonic emitter, performing double-sided coating on the prepared substrate through an ultrasonic generation control system, and performing primary drying, slicing and secondary drying on the double-sided coated substrate to prepare a finished reconstituted tobacco product. The process disclosed by the invention is energy-saving and environment-friendly, and utilizes the mechanical effect, the cavitation effect and the thermal effect of ultrasonic waves to improve the coating rate of the reconstituted tobacco, avoid the loss of aroma components in the coating liquid and improve the sensory quality of the reconstituted tobacco.)

1. A process for improving the spreading rate of reconstituted tobacco is characterized by comprising the following steps: comprises the following steps:

(1) adding pure water 4-8 times of the total mixture into the total mixture of tobacco stem, tobacco powder and secondary tobacco leaf, mixing uniformly, performing countercurrent extraction at 65-80 deg.C for 1 hr, and performing solid-liquid separation to obtain insoluble substance and extractive solution;

(2) Pulping, papermaking and dehydrating the insoluble substance obtained in the step (1) to prepare a substrate;

(3) Filtering the extracting solution obtained in the step (1), and concentrating under reduced pressure until the solid content reaches 45-60% to obtain a concentrated solution, wherein the solid content is in percentage by mass;

(4) Adding tobacco essence into the concentrated solution obtained in the step (3), and stirring and mixing uniformly to obtain a coating liquid; wherein the proportion of the tobacco essence is 0.5 to 15 percent of the weight of the concentrated solution;

(5) An ultrasonic wave emitting head is additionally arranged in the coating liquid tank, and the emitting head is connected with an ultrasonic wave generator to form a set of ultrasonic wave generation control system;

(6) Conveying the coating liquid prepared in the step (4) into the coating liquid tank in the step (5) through a pipeline, starting an ultrasonic generation control system, setting the heating temperature of the coating liquid tank to be 40-50 ℃ and the ultrasonic frequency to be 30-60kHz, and then drawing the substrate prepared in the step (2) into the coating liquid tank through a coating roller at the running speed of 80-120m/min to perform double-sided coating on the substrate;

(7) And (4) carrying out primary drying, slicing and secondary drying on the substrate coated on the two sides in the step (6) to prepare a finished reconstituted tobacco product.

2. the process of claim 1, wherein the process comprises the following steps: and (5) the ultrasonic wave generation control system consists of a PLC (programmable logic controller), an LED (light-emitting diode) data display, an ultrasonic generator, an energy converter and a power amplifier.

Technical Field

the invention belongs to the field of manufacturing and processing of tobacco industry, and particularly relates to a process for improving the spreading rate of reconstituted tobacco.

Background

the main process flow of the reconstituted tobacco is that according to the formula requirement of tobacco sheet raw materials, tobacco raw materials such as tobacco powder, tobacco stems, tobacco fragments and the like are firstly extracted by a solvent (usually water), and the solid part obtained after solid-liquid separation is processed into a substrate by a papermaking method; the liquid part is refined, concentrated and aromatized to prepare coating liquid, then the coating liquid is coated on a substrate by adopting a double-roller coating mode and the like, and the sheet is prepared after the procedures of hot air drying, slicing and the like.

The coating process is one of key processes of the reconstituted tobacco, and directly influences the physical and chemical indexes and the sensory quality of the reconstituted tobacco. In general, by adjusting the coating rate of the reconstituted tobacco, the adjustment and the controllability of key physical and chemical indexes such as total nitrogen, total sugar, reducing sugar, total plant alkali and the like in the reconstituted tobacco product can be realized; the sensory quality of the reconstituted tobacco can be improved by increasing the coating rate, the processing performance of the reconstituted tobacco is improved, the discharge of production wastewater is reduced, and the cost is saved.

as can be seen by looking up the current literature data, the technical research on how to improve the spreading rate of the reconstituted tobacco leaves has been reported. For example, the invention patent (application number: CN201610572948.3) adopts a mode of separately pulping softwood fibers and hardwood fibers, thereby avoiding the problems of increased mixed pulping fine fibers and lower substrate bulk, increasing the coating rate of reconstituted tobacco, and the process of the method can bring influence on the physical properties of the reconstituted tobacco, is not beneficial to production control and has unobvious application effect; the invention patent (application number: CN201110152311.6) adopts the method that the paper base after the slurry forming is punched and then is coated with the coating liquid, thereby obviously improving the absorption performance of the paper base to the coating liquid and finally improving the coating rate.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a process capable of improving the spreading rate of reconstituted tobacco and improving the sensory quality of the reconstituted tobacco.

The invention adopts the following technical scheme for realizing the aim:

A process for improving the spreading rate of reconstituted tobacco mainly comprises the following steps:

(1) Adding pure water 4-8 times of the total mixture into the total mixture of tobacco stem, tobacco powder and secondary tobacco leaf, mixing uniformly, performing countercurrent extraction at 65-80 deg.C for 1 hr, and performing solid-liquid separation to obtain insoluble substance and extractive solution;

(2) Pulping, papermaking and dehydrating the insoluble substance obtained in the step (1) to prepare a substrate;

(3) Filtering the extracting solution obtained in the step (1), and concentrating under reduced pressure until the solid content reaches 45-60% to obtain a concentrated solution, wherein the solid content is in percentage by mass;

(4) Adding tobacco essence in a certain proportion into the concentrated solution obtained in the step (3), and stirring and mixing uniformly to obtain a coating liquid; the proportion of the tobacco essence is 0.5 to 15 percent of the weight of the concentrated solution;

(5) An ultrasonic wave emitting head is additionally arranged in the coating liquid tank, and the emitting head is connected with an ultrasonic wave generator to form a set of ultrasonic wave generation control system;

(6) conveying the coating liquid prepared in the step (4) into the coating liquid tank in the step (5) through a pipeline, starting an ultrasonic generation control system, setting the heating temperature of the coating liquid tank to be 40-50 ℃ and the ultrasonic frequency to be 30-60kHz, and then drawing the substrate prepared in the step (2) into the coating liquid tank through a coating roller at the running speed of 80-120m/min to perform double-sided coating on the substrate;

(7) and (4) carrying out primary drying, slicing and secondary drying on the substrate coated on the two sides in the step (6) to prepare a finished reconstituted tobacco product.

and (5) the ultrasonic wave generation control system consists of a PLC (programmable logic controller), an LED (light-emitting diode) data display, an ultrasonic generator, an energy converter, a power amplifier and the like.

The tobacco essence is an independently prepared essence, and comprises Tie Guanyin essence, honey essence and the like, because the content of aldehydes and esters in the independently prepared essence is relatively high, the mixing effect is not ideal when the independently prepared essence is added into the coating liquid obtained after the concentrated solution obtained in the step (3), namely the independently prepared essence cannot well achieve the mixing effect in the concentrated solution, and after the independently prepared essence is conveyed into the coating liquid tank in the step (5) through a pipeline, the independently prepared essence and the concentrated solution can be mixed to achieve a uniform state under the action of ultrasonic waves.

when the ultrasonic system is started, a high-frequency oscillation signal sent by the ultrasonic generator is converted into high-frequency mechanical oscillation through the transducer and is transmitted into the coating liquid, ultrasonic waves are radiated forwards at intervals in the coating liquid, and the liquid flows to generate tens of thousands of micro-bubbles. These bubbles form and grow in the negative pressure region where the ultrasonic waves propagate in the longitudinal direction, and rapidly close in the positive pressure region. The bubble closure can form instant high pressure over 1000 air pressures, and the instant high pressure is continuously generated to continuously impact the surface of the substrate, so that the chemical components of the coating liquid quickly enter the gaps of the substrate, and the aim of improving the coating rate of the reconstituted tobacco is fulfilled. Meanwhile, the mechanical action of the ultrasonic wave can improve the dispersion uniformity of chemical components in the coating liquid, and is beneficial to the absorption of the substrate to the coating liquid.

compared with the prior art, the invention has the following advantages:

The traditional process for improving the coating rate of the reconstituted tobacco mainly adopts the methods of independent pulping of external fibers, punching of a substrate and the like, has complicated process and high production cost, and can influence the continuity of production and the stability of process indexes to a certain extent. The method is energy-saving and environment-friendly, the coating rate of the reconstituted tobacco is improved by adopting a physical method, and the loss of aroma components in the coating liquid is avoided.

Detailed Description

The features and advantages of the present invention will be further understood by the following specific examples. The examples provided are merely illustrative of the method of the present invention and do not limit the remainder of the disclosure in any way.

the ultrasonic wave generation control system in the embodiment of the invention comprises a PLC (programmable logic controller), an LED (light-emitting diode) data display, an ultrasonic generator, an energy converter, a power amplifier and the like.

[ example 1 ]

A process for improving the spreading rate of reconstituted tobacco mainly comprises the following steps:

(1) Adding pure water with the mass 5 times of that of the total mixture into the total mixture of the tobacco stems, the tobacco powder and the secondary tobacco leaves, uniformly mixing, extracting for 1h at 70 ℃, and after extraction is finished, carrying out solid-liquid separation to obtain insoluble substances and an extracting solution.

(2) pulping, papermaking and dehydrating the insoluble substance obtained in the step (1) to prepare the substrate.

(3) And (2) filtering the extracting solution obtained in the step (1), and concentrating under reduced pressure until the solid content reaches 56% to obtain a concentrated solution.

(4) And (4) adding honey essence (essence for cigarettes) accounting for 0.5 percent of the weight of the concentrated solution into the concentrated solution obtained in the step (3), and stirring and mixing uniformly to obtain the coating liquid.

(5) An ultrasonic wave emitting head is additionally arranged in the coating liquid groove, and the emitting head is connected with an ultrasonic wave generator to form a set of ultrasonic wave generation control system.

(6) And (3) conveying the coating liquid prepared in the step (4) into the liquid distribution tank in the coating step (5) through a pipeline, starting an ultrasonic generation control system, setting the heating temperature of the coating liquid tank to be 42 ℃ and the ultrasonic frequency to be 50kHz, and then, drawing the substrate prepared in the step (2) into the coating liquid tank through a coating roller under the condition of the running speed of 115m/min to carry out double-side coating on the substrate.

(7) and (4) carrying out primary drying, slicing and secondary drying on the substrate coated on the two sides in the step (6) to prepare a finished reconstituted tobacco product.

[ example 2 ]

A process for improving the spreading rate of reconstituted tobacco mainly comprises the following steps:

(1) Adding pure water with the mass 8 times of that of the total mixture into the total mixture of the tobacco stems, the tobacco powder and the secondary tobacco leaves, uniformly mixing, extracting for 1h at 65 ℃, and after extraction is finished, carrying out solid-liquid separation to obtain insoluble substances and an extracting solution.

(2) Pulping, papermaking and dehydrating the insoluble substance obtained in the step (1) to prepare the substrate.

(3) And (2) filtering the extracting solution obtained in the step (1), and concentrating under reduced pressure until the solid content reaches 47% to obtain a concentrated solution.

(4) and (4) adding honey essence (essence for cigarettes) accounting for 15% of the weight of the concentrated solution into the concentrated solution obtained in the step (3), and stirring and mixing uniformly to obtain the coating liquid.

(5) An ultrasonic wave emitting head is additionally arranged in the coating liquid groove, and the emitting head is connected with an ultrasonic wave generator to form a set of ultrasonic wave generation control system.

(6) And (3) conveying the coating liquid prepared in the step (4) into the coating liquid tank in the step (5) through a pipeline, starting an ultrasonic wave generation control system, setting the heating temperature of the coating liquid tank to be 46 ℃ and the ultrasonic frequency to be 30kHz, and then drawing the substrate prepared in the step (2) into the coating liquid tank through a coating roller at the running speed of 120m/min to perform double-sided coating on the substrate.

(7) And (4) carrying out primary drying, slicing and secondary drying on the substrate coated on the two sides in the step (6) to prepare a finished reconstituted tobacco product.

[ example 3 ]

A process for improving the spreading rate of reconstituted tobacco mainly comprises the following steps:

(1) Adding pure water with the mass 5.5 times of the total mixture into the total mixture of the tobacco stalks, the tobacco powder and the secondary tobacco leaves, uniformly mixing, extracting for 1h at the temperature of 80 ℃, and after extraction is finished, carrying out solid-liquid separation to obtain insoluble substances and an extracting solution.

(2) Pulping, papermaking and dehydrating the insoluble substance obtained in the step (1) to prepare the substrate.

(3) And (2) filtering the extracting solution obtained in the step (1), and concentrating under reduced pressure until the solid content reaches 45% to obtain a concentrated solution.

(4) And (4) adding honey essence (essence for cigarettes) accounting for 9% of the weight of the concentrated solution into the concentrated solution obtained in the step (3), and stirring and mixing uniformly to obtain the coating liquid.

(5) an ultrasonic wave emitting head is additionally arranged in the coating liquid groove, and the emitting head is connected with an ultrasonic wave generator to form a set of ultrasonic wave generation control system.

(6) and (3) conveying the coating liquid prepared in the step (4) into the coating liquid tank in the step (5) through a pipeline, starting an ultrasonic wave generation control system, setting the heating temperature of the coating liquid tank to be 40 ℃ and the ultrasonic frequency to be 35kHz, and then drawing the substrate prepared in the step (2) into the coating liquid tank through a coating roller at the running speed of 80m/min to perform double-sided coating on the substrate.

(7) And (4) carrying out primary drying, slicing and secondary drying on the substrate coated on the two sides in the step (6) to prepare a finished reconstituted tobacco product.

[ example 4 ]

A process for improving the spreading rate of reconstituted tobacco mainly comprises the following steps:

(1) Adding pure water 4 times of the total mixture into the total mixture of tobacco stem, tobacco powder and secondary tobacco leaf, mixing uniformly, extracting at 75 deg.C for 1h, and performing solid-liquid separation to obtain insoluble substance and extractive solution.

(2) Pulping, papermaking and dehydrating the insoluble substance obtained in the step (1) to prepare the substrate.

(3) Filtering the extracting solution obtained in the step (1), and concentrating under reduced pressure until the solid content reaches 52% to obtain a concentrated solution.

(4) And (4) adding the Tieguanyin spice (essence for cigarettes) accounting for 1% of the weight of the concentrated solution into the concentrated solution obtained in the step (3), and stirring and mixing uniformly to obtain a coating liquid.

(5) An ultrasonic wave emitting head is additionally arranged in the coating liquid groove, and the emitting head is connected with an ultrasonic wave generator to form a set of ultrasonic wave generation control system.

(6) and (3) conveying the coating liquid prepared in the step (4) into the coating liquid tank in the step (5) through a pipeline, starting an ultrasonic wave generation control system, setting the heating temperature of the coating liquid tank to be 45 ℃ and the ultrasonic frequency to be 40kHz, and then drawing the substrate prepared in the step (2) into the coating liquid tank through a coating roller at the running speed of 85m/min to perform double-sided coating on the substrate.

(7) And (4) carrying out primary drying, slicing and secondary drying on the substrate coated on the two sides in the step (6) to prepare a finished reconstituted tobacco product.

[ example 5 ]

A process for improving the spreading rate of reconstituted tobacco mainly comprises the following steps:

(1) Adding pure water 7.5 times of the total mixture into the total mixture of tobacco stem, tobacco powder and secondary tobacco leaf, mixing uniformly, extracting at 68 deg.C for 1 hr, and separating solid and liquid to obtain insoluble substance and extractive solution.

(2) Pulping, papermaking and dehydrating the insoluble substance obtained in the step (1) to prepare the substrate.

(3) And (2) filtering the extracting solution obtained in the step (1), and concentrating under reduced pressure until the solid content reaches 60% to obtain a concentrated solution.

(4) And (4) adding the Tieguanyin spice (essence for cigarettes) accounting for 5% of the weight of the concentrated solution into the concentrated solution obtained in the step (3), and stirring and mixing uniformly to obtain a coating liquid.

(5) an ultrasonic wave emitting head is additionally arranged in the coating liquid groove, and the emitting head is connected with an ultrasonic wave generator to form a set of ultrasonic wave generation control system.

(6) and (3) conveying the coating liquid prepared in the step (4) into the coating liquid tank in the step (5) through a pipeline, starting an ultrasonic wave generation control system, setting the heating temperature of the coating liquid tank to be 50 ℃, setting the ultrasonic frequency to be 60kHz, and then drawing the substrate prepared in the step (2) into the coating liquid tank through a coating roller at the running speed of 93m/min to perform double-sided coating on the substrate.

(7) And (4) carrying out primary drying, slicing and secondary drying on the substrate coated on the two sides in the step (6) to prepare a finished reconstituted tobacco product.

Reconstituted tobacco coating rate contrast test

Taking the base sheet and the reconstituted tobacco finished product prepared in the above examples 1 to 5 as samples, taking the reconstituted tobacco finished product which is not subjected to ultrasonic treatment as a control sample, simultaneously putting the samples into an oven, drying the samples at (105 +/-1) DEG C to constant weight, taking out and weighing the dried reconstituted tobacco, and calculating the actual coating rate T according to the following formula:

T＝(M₁-M₂)/M₁×100％

Wherein M1 is the oven dry basis weight (g/M2) of the finished reconstituted tobacco, and M2 is the oven dry basis weight (g/M2) of the base sheet. The related data are shown in the following table 1 (reproduced tobacco leaf sample spreading rate statistical table),

TABLE 1

as can be seen from the results in the table, the spreading rate of the reconstituted tobacco reaches more than 41% by utilizing the process provided by the invention; compared with the control sample, the coating rate is increased by about 16 percent, and the increase is more obvious.

Test for evaluating effect of cigarette

The reconstituted tobacco finished products prepared in the above examples 1 to 5 are rolled into cigarettes, and the reconstituted tobacco finished products which are not subjected to ultrasonic treatment are rolled into cigarettes as reference products. And selecting 9 smoke evaluators for evaluation. The specific smoking result is shown in table 2 (comparison table of reconstituted tobacco smoking results),

TABLE 2

In the above table, the better the aroma, the higher the score, the full score of 15; the more rich the smoke flavor, the higher the score, the full score is 25; the less the miscellaneous gas, the higher the score, the full score of 15; the lighter the burning sensation is, the higher the score is, the full score is 15; the smaller the dry sensation, the higher the score, and the full score of 15; the lighter the residue, the higher the score, the full score of 15, and the total full score of 100.

According to the result of the test, the reconstituted tobacco finished product prepared by the embodiment of the invention can increase the herbal fragrance of the tobacco, improve the quality of the fragrance, reduce miscellaneous gas, burning sensation and irritation of the oral cavity and further improve the aftertaste of the oral cavity while improving the coating rate.

In conclusion, the invention utilizes the mechanical effect, the cavitation effect and the thermal effect of the ultrasonic wave to improve the adsorption and the penetrating performance of macromolecular substances in the coating liquid on the surface of the substrate, so that chemical components in the coating liquid can quickly enter the substrate, the condition that the coating liquid is only accumulated on the surface of the substrate and cannot penetrate into the substrate is avoided, the utilization rate of the coating liquid can be effectively improved, the production cost is reduced, and the sensory quality of the reconstituted tobacco is improved. The method is energy-saving and environment-friendly, the coating rate of the reconstituted tobacco is improved by adopting a physical method, and the loss of aroma components in the coating liquid is avoided.