CN110679989A - Method for improving strength of reconstituted tobacco substrate - Google Patents
Method for improving strength of reconstituted tobacco substrate Download PDFInfo
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- CN110679989A CN110679989A CN201910848353.XA CN201910848353A CN110679989A CN 110679989 A CN110679989 A CN 110679989A CN 201910848353 A CN201910848353 A CN 201910848353A CN 110679989 A CN110679989 A CN 110679989A
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- reconstituted tobacco
- polyvinyl alcohol
- strength
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/10—Chemical features of tobacco products or tobacco substitutes
- A24B15/12—Chemical features of tobacco products or tobacco substitutes of reconstituted tobacco
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- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24B—MANUFACTURE OR PREPARATION OF TOBACCO FOR SMOKING OR CHEWING; TOBACCO; SNUFF
- A24B15/00—Chemical features or treatment of tobacco; Tobacco substitutes, e.g. in liquid form
- A24B15/18—Treatment of tobacco products or tobacco substitutes
- A24B15/28—Treatment of tobacco products or tobacco substitutes by chemical substances
- A24B15/30—Treatment of tobacco products or tobacco substitutes by chemical substances by organic substances
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Manufacture Of Tobacco Products (AREA)
Abstract
The invention relates to a method for improving the strength of a reconstituted tobacco substrate, which comprises the steps of dispersing and dissolving polyvinyl alcohol in water to form a polyvinyl alcohol solution with a certain concentration, adjusting the frequency of a variable frequency water pump through a flowmeter to adjust the flow rate, sending the polyvinyl alcohol solution to a water spraying pipe, uniformly spraying the polyvinyl alcohol solution onto wet paper sheets at the rear section of a water net or a squeezing part through fan-shaped nozzles on the water spraying pipe, and diffusing and further uniformly dispersing the polyvinyl alcohol into the wet paper sheets through squeezing and dehydration. The polyvinyl alcohol contains a large amount of hydroxyl, has good binding force with hydrophilic cellulose, is easy to form a film, has excellent mechanical properties of the film, can improve the tensile strength, the wear resistance, the folding resistance and the tearing resistance of the paper when used as a paper surface sizing agent, is nontoxic, has no irritation to human skin, has no peculiar smell after combustion, and can well meet the requirements of the safety and the smoking quality of reconstituted tobacco.
Description
Technical Field
The invention belongs to the technical field of reconstituted tobacco manufacturing, and particularly relates to a method for improving the strength of a reconstituted tobacco substrate.
Background
The tobacco sheet remade through the paper-making method is commonly called as tobacco sheet, and is characterized in that tobacco waste such as tobacco stems, tobacco scraps and fragments is used as a main raw material, the tobacco raw material is soaked in water, then water-soluble substances and insoluble substances in the tobacco are subjected to solid-liquid separation, by means of paper-making equipment and technology, the insoluble substances such as tobacco fibers and the like are dispersed in the water and then made into a fiber sheet base through a paper-making machine, meanwhile, the water-soluble substances are coated and added back to the sheet base after being concentrated, and the tobacco sheet remade through the paper-.
In the production process of the paper-making reconstituted tobacco, because the tobacco stems and the tobacco powder pulp are short in fiber, the tobacco stems and the tobacco powder pulp are difficult to be divided into single fiber, and the single fiber generally exists in a fiber bundle or fragment form, the tensile strength of the substrate is poor, the papermaking performance is poor, and the poor papermaking performance is mainly reflected in the paper breaking at a coating machine caused by the low tensile strength and the defects of the substrate. In order to improve the paper-making property of the reconstituted tobacco, non-tobacco additional fibers such as wood pulp and the like need to be added into the reconstituted tobacco slurry, so that the tensile strength and the tearing index of the base sheet are obviously improved, but the release amount of tar and CO is reduced to different degrees. The increase of the wood pulp addition amount can bring adverse effects on the sensory quality of the reconstituted tobacco, and generates 'wood gas', so the wood pulp addition amount cannot be too high and is generally 6-15%, if the sensory quality of the reconstituted tobacco is further improved, the use proportion of the added wood pulp fiber needs to be continuously reduced, thus the papermaking performance of the reconstituted tobacco paper base is limited, the papermaking speed of a paper machine is lower, the production efficiency is not high, and the production cost is increased. Therefore, the sensory quality of the reconstituted tobacco product is improved, the papermaking performance of the pulp is guaranteed, and the method has important significance for further development of the reconstituted tobacco.
Patent CN102240065B discloses a method for improving wet strength and softness of a sheet-made substrate by a paper-making method, which is to prepare chitosan acetic acid solution from specific food-grade chitosan, add the chitosan acetic acid solution into tobacco pulp, and then make the sheet by paper, so as to effectively improve the wet tensile strength and softness of the tobacco sheet.
Patent CN102823934B discloses a method for improving the wet tensile strength of a tobacco sheet by a paper making method, wherein a solution is prepared from specific hydroxyethyl cellulose and chitosan, and then the solution is added into tobacco slurry to improve the wet tensile strength of the tobacco sheet and ensure the production continuity of low-basis-weight tobacco sheets made by paper making.
The patent CN107080279A discloses a method for improving the strength of a reconstituted tobacco paper base, which comprises the steps of adding an externally added paper pulp fiber into tobacco pulp together with paper pulp subjected to conventional low-concentration pulp grinding after carrying out sticky pulping treatment, mixing and then carrying out paper making, and improving the tensile strength and the paper making speed of the reconstituted tobacco paper base.
From the prior art, the strength of the wet paper of the tobacco sheet is improved mainly by adding chitosan and hydroxyethyl cellulose compound additives into the pulp, the strength of the dry paper at a coating machine cannot be obviously improved, and the problems of combination loss with fine fibers and anionic garbage in the pulp or loss along with white water exist in the application process, so that the production cost is high; and the paper base reinforcement in the aspect of fiber treatment can not obviously reduce the added wood pulp fiber amount, and can still not solve the contradiction problem of the sensory quality and the production efficiency of the reconstituted tobacco.
Disclosure of Invention
The invention aims to overcome the defects and shortcomings of the prior art, and provides a method for improving the strength of a reconstituted tobacco substrate by applying a substrate reinforcing agent to the rear section or the squeezing part of a water net formed by dehydrating a large number of paper sheets under the condition of reducing the proportion of wood pulp fibers added in reconstituted tobacco slurry, so that the sensory quality is improved, the papermaking performance of the slurry is guaranteed, and the cost is controllable.
The invention is realized by the following technical scheme:
a method for improving the strength of a reconstituted tobacco substrate comprises the following steps:
(1) dispersing and dissolving polyvinyl alcohol in hot water at a set temperature to obtain a polyvinyl alcohol solution with a set mass percentage concentration;
(2) spraying the polyvinyl alcohol solution obtained in the step (1) on wet paper sheets in the reconstituted tobacco manufacturing process through a spraying device;
(3) and at least drying and gluing the reconstituted tobacco manufacturing process to obtain the reconstituted tobacco substrate.
The set temperature of the hot water is 70-90 ℃, and the set mass percentage concentration of the polyvinyl alcohol solution is 0.5-2.0%.
The spraying device at least comprises a variable frequency water pump and a water spraying pipe which are adjusted by a flow meter, and a nozzle is arranged on the water spraying pipe.
And a pipeline filter and an adjusting valve are arranged at the water inlet end of the water spraying pipe.
The filtering precision of the pipeline filter is 100-200 meshes.
The nozzles are fan nozzles, and the width of the water spray pipe is the same as the width of the paper web of the wet paper sheet.
The polyvinyl alcohol solution is sprayed on wet paper of the back section of the mesh part procedure or the pressing part procedure.
If the reconstituted tobacco manufacturing process adopts double-felt blanket squeezing, the polyvinyl alcohol solution is sprayed on wet paper at the rear section of the mesh part procedure; if single felt press is adopted, the polyvinyl alcohol solution is sprayed on the wet paper of the press part.
The nozzles are arranged above the wet paper of the rear section of the mesh part process or below the wet paper of the pressing part.
According to the weight percentage, the addition amount of the polyvinyl alcohol is 0.1-0.5% of the absolute dry slurry.
The invention has the beneficial effects that:
the polyvinyl alcohol contains a large amount of hydroxyl, has good binding force with hydrophilic cellulose, is easy to form a film, has excellent mechanical properties, and can improve the tensile strength, the wear resistance, the folding resistance and the tearing strength of paper when used as a paper surface sizing agent. And the reconstituted tobacco is non-toxic, has no irritation to human skin, has no peculiar smell after combustion, and can well meet the requirements of the safety and the smoking quality of the reconstituted tobacco.
After the technical scheme is applied to the production of reconstituted tobacco, the tensile strength of a finished product is improved by 50-80%, the paper breaking frequency is reduced by more than 60%, the production efficiency is obviously improved, and the labor intensity of personnel and the production operation cost are obviously reduced.
Drawings
FIG. 1 is a flow chart of the spraying device of the present invention.
Description of the reference numerals
1 dissolving tank, 2 flow meters, 3 variable frequency pumps, 4 flow meters, 5 spray pipes and 6 nozzles.
Detailed Description
The technical solutions of the present invention are described in detail below by examples, and the following examples are only exemplary and can be used only for explaining and explaining the technical solutions of the present invention, but not construed as limiting the technical solutions of the present invention.
The application provides a spraying device, as shown in fig. 1, hot water, clean water pass through the pipeline and are connected with the play water piping of dissolving tank 1 for polyvinyl alcohol solution in the dissolving tank mixes the back with hot water or clean water, gets into inverter pump 3, under the regulation through flowmeter 4, carries for spray pipe 5, is provided with nozzle 6 on the spray pipe, is provided with the blowoff valve at the one end of spray pipe.
In the technical scheme of the application, the reconstituted tobacco is prepared by using a paper-making method, the manufacturing process is the prior art, the applicant does not describe in detail here, and the method for improving the strength of the reconstituted tobacco base sheet provided by the application is implemented on the post-stage of the mesh part process of the paper-making process or the pressing process, and has no change to other previous processes or subsequent processes.
In the technical scheme of the application, a water spraying pipe of a spraying device is respectively arranged above the rear section of the wire part process or below the pressing process, and the width of the water spraying pipe is the same as or wider than the width of a paper web of the wet paper prepared in the papermaking process so as to avoid the situation that the wet paper web cannot be sprayed.
In the papermaking process, if double-felt squeezing is adopted, the polyvinyl alcohol solution is sprayed on wet paper at the later stage of the mesh part procedure; if single felt press is adopted, the polyvinyl alcohol solution is sprayed on the wet paper of the press part.
The nozzle that sets up on the spray pipe of this application is fan-shaped nozzle, reaches horizontal even, the good spraying effect of atomizing. The water inlet end of the spray pipe is provided with a pipeline filter and a regulating valve with the filtering precision of 100 and 200 meshes.
The application also provides a method for improving the strength of the reconstituted tobacco substrate, which comprises the following steps:
(1) dispersing and dissolving polyvinyl alcohol in hot water at a set temperature to obtain a polyvinyl alcohol solution with a set mass percentage concentration; in the application, the set temperature of the hot water is 70-90 ℃, the set mass percentage concentration of the polyvinyl alcohol solution is 0.5-2.0%, and the concentration of the polyvinyl alcohol solution can be adjusted according to production requirements.
(2) Spraying the polyvinyl alcohol solution obtained in the step (1) on wet paper sheets in the reconstituted tobacco manufacturing process through a spraying device; the flow rate of the polyvinyl alcohol solution is adjusted to be 100-400L/h, and the addition amount of the polyvinyl alcohol is 0.1-0.5 percent of the absolute dry slurry in percentage by weight. The concentration of polyvinyl alcohol can be adjusted according to the production rate.
(3) At least through the squeezing and drying procedures of the reconstituted tobacco manufacturing process, the reconstituted tobacco substrate is prepared.
Polyvinyl alcohol is dispersed and dissolved in water to form a polyvinyl alcohol solution with a certain concentration, the polyvinyl alcohol solution is adjusted by a flowmeter to adjust the frequency of a variable frequency water pump to adjust the flow rate and is sent to a water spraying pipe, the polyvinyl alcohol solution is uniformly sprayed onto wet paper sheets at the rear section of a water net part or a squeezing part through fan-shaped nozzles on the water spraying pipe, the polyvinyl alcohol is diffused (Z direction) and further uniformly dispersed into the wet paper sheets through squeezing and dehydration, and the papermaking performance of the reconstituted tobacco base sheet is obviously improved and the tensile strength is improved by more than 50 percent along the X direction (width direction of the paper sheets and the Y direction (length direction of the paper sheets).
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The method for improving the strength of the reconstituted tobacco substrate is characterized by comprising the following steps:
(1) dispersing and dissolving polyvinyl alcohol in hot water at a set temperature to obtain a polyvinyl alcohol solution with a set mass percentage concentration;
(2) spraying the polyvinyl alcohol solution obtained in the step (1) on wet paper sheets in the reconstituted tobacco manufacturing process through a spraying device;
(3) and at least drying and gluing the reconstituted tobacco manufacturing process to obtain the reconstituted tobacco substrate.
2. The method for improving the strength of the reconstituted tobacco substrate according to claim 1, wherein the set temperature of the hot water is 70-90 ℃ and the set mass percentage concentration of the polyvinyl alcohol solution is 0.5-2.0%.
3. The method for improving the strength of the reconstituted tobacco substrate according to claim 1, wherein the spraying device at least comprises a variable frequency water pump regulated by a flow meter and a water spraying pipe, and a nozzle is arranged on the water spraying pipe.
4. The method for improving the strength of a reconstituted tobacco substrate according to claim 3, wherein a pipeline filter and a regulating valve are arranged at the water inlet end of the water spraying pipe.
5. The method for improving the strength of the reconstituted tobacco substrate according to claim 4, wherein the filtering precision of the pipeline filter is 100-200 meshes.
6. The method of claim 3, wherein the nozzles are fan nozzles and the water jet has a width about the same as the width of the web of wet paper.
7. The method for improving the strength of a reconstituted tobacco substrate according to claim 6, wherein the nozzle is arranged above a wet paper sheet of a later stage of a mesh part process or below a wet paper sheet of a press part process.
8. The method for improving the strength of the reconstituted tobacco substrate according to claim 1 or 7, wherein the polyvinyl alcohol solution is sprayed on wet paper of a later stage of a mesh part process or a pressing part process.
9. The method for improving the strength of the reconstituted tobacco substrate according to claim 8, wherein if the reconstituted tobacco manufacturing process adopts double-felt squeezing, the polyvinyl alcohol solution is sprayed on wet paper at the later stage of the mesh part procedure; if single felt press is adopted, the polyvinyl alcohol solution is sprayed on the wet paper of the press part.
10. The method for improving the strength of the reconstituted tobacco substrate according to claim 1, wherein the polyvinyl alcohol is added in an amount of 0.1-0.5% by weight of the absolute dry slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910848353.XA CN110679989A (en) | 2019-09-09 | 2019-09-09 | Method for improving strength of reconstituted tobacco substrate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910848353.XA CN110679989A (en) | 2019-09-09 | 2019-09-09 | Method for improving strength of reconstituted tobacco substrate |
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| CN110679989A true CN110679989A (en) | 2020-01-14 |
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| CN201910848353.XA Pending CN110679989A (en) | 2019-09-09 | 2019-09-09 | Method for improving strength of reconstituted tobacco substrate |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111996832A (en) * | 2020-09-17 | 2020-11-27 | 中国海诚工程科技股份有限公司 | Tobacco flake base paper capable of being heated and not combusted and preparation method thereof |
| CN112021635A (en) * | 2020-09-27 | 2020-12-04 | 河南卷烟工业烟草薄片有限公司 | Production process of reconstituted tobacco of compound heating cigarette |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111996832A (en) * | 2020-09-17 | 2020-11-27 | 中国海诚工程科技股份有限公司 | Tobacco flake base paper capable of being heated and not combusted and preparation method thereof |
| CN112021635A (en) * | 2020-09-27 | 2020-12-04 | 河南卷烟工业烟草薄片有限公司 | Production process of reconstituted tobacco of compound heating cigarette |
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