CN1082356C - Method for preparing imitation tobacco sheet by adding wood pulp fiber into tobacco powder - Google Patents

Abstract

A method for uniformly blending wood pulp fibers into smoke powder to prepare tobacco sheets, comprising the following steps: (1) dissolving wood pulp fiber boards into single fibers in water to obtain a wood pulp solution with a fiber concentration of 1-15%; The wood pulp solution obtained in step (1) is introduced into the medium solution, and the binder is added and stirred for 1-3 hours to fully mix it with the wood pulp solution, thereby making the single fiber evenly distributed in the medium solution; The wood pulp-medium solution obtained in the step (2), the sheet auxiliary material and the smoke powder are uniformly mixed, and then the obtained mixture is pressed into a tobacco sheet.

Description

Method for preparing tobacco sheet by evenly blending wood pulp fiber into smoke powder

The invention relates to a method for uniformly blending wood pulp fibers into smoke powder to prepare tobacco sheet, in particular to a method for preparing tobacco sheet by using a medium to uniformly blend wood pulp fiber into smoke powder.

Tobacco sheet (Reconstituted Tobacco) is a product made by tobacco companies by reprocessing the leftovers such as stems, stems, and tobacco powder produced by cigarette processing (also called reconstituted cigarette raw materials). Realize the utilization of waste, regenerate shredded tobacco, improve the quality of cigarettes and improve the taste of tobacco. At present, there are mainly three kinds of technological methods for making tobacco sheets in various countries in the world, namely papermaking method, thick pulp method and rolling method. China, Japan, Singapore and other countries basically adopt the rolling method.

Evenly blending fibers into tobacco powder, the raw material of tobacco sheets, has obvious effects on improving the physical properties of tobacco sheets such as strength, burst resistance, and toughness, and improving the effective utilization rate of tobacco sheets. Due to the limitations of the process method and corresponding equipment in the manufacture of flakes by the rolling method, the implementation of this blending process has been in a stagnant situation for many years.

At present, many manufacturers across the country have carried out useful explorations on tobacco flake fibering technology, but in summary, there are no more than two types: 1. Dry addition; 2. Wet addition. These two kinds of craft methods all have its shortcoming. The dry addition method is to mix the raw materials with the wood pulp boards processed into small pieces, and then enter the collection bin after being crushed, and then enter the mixed tabletting after adding the feed liquid. The main problems are: (1) the wood pulp board is crushed by a pulverizer, and the fiber length is destroyed, which affects the effective use of the fiber; (2) the fiber and the smoke powder are mixed unevenly due to the difference in density, resulting in unstable physical properties of the sheet. The wet addition method is to hydrolyze the wood pulp and then dehydrate it, mix it with the pulverized tobacco powder, add the material liquid, mix and press the tablet. The main problems are: (1) the process is complex, the investment is large, and the cost is high; (2) the fiber addition is uneven and the utilization is insufficient, resulting in white spots in the sheet, and the fiber consumption is large.

In order to overcome the damage to fibers by dry addition, some manufacturers use wet addition, which involves the problem of fiber defibrillation. If the traditional air blowing hammer defibrating machine is used to defibrate and blend with airflow and other mechanical methods, because the blending amount is too small, it will have little effect on the physical properties of the sheet; The method of mixing with dry powder after dehydration, due to the influence of a certain amount of water in the fiber and the affinity between fibers, causes the fiber to "cluster" again, making the fiber mixed in the smoke powder unevenly, resulting in "flower flakes" and "white flakes". Sheets" and other undesirable phenomena affect the effective use of fibers and the inherent quality and flavor of tobacco flakes.

At present, Japan has a relatively high level of technology in the manufacture of tobacco and flakes. They mainly use roller pressing equipment for fiber addition, and the amount of wood pulp fiber added is as high as 10-20%, in an attempt to make up for the existence of the above two technologies. The problems of poor uniformity and insufficient function of the fiber not only increase the production cost but also affect the taste of the shredded tobacco.

The purpose of the present invention is to overcome the problems in the prior art and provide a method for uniformly blending wood pulp fibers into tobacco powder with a larger blending amount to prepare high-quality tobacco sheets at low cost.

Aiming at the problems existing in the prior art, the inventors of the present invention have developed a method for preparing tobacco sheets by evenly blending wood pulp fibers into smoke powder through various scientific demonstrations and a large number of experiments and practices. The method includes The following steps:

(1) dissolving the wood pulp fiberboard into single fibers in water to obtain a wood pulp solution with a fiber concentration of 1-15%;

(2) Add the wood pulp solution obtained in step (1) into the medium solution, add the binder, and stir for 1-3 hours to fully mix it with the wood pulp solution, thereby making the single fiber evenly distributed in the medium in solution;

(3) Mix the wood pulp-medium solution obtained in step (2), sheet auxiliary materials and smoke powder evenly, and then press the obtained mixture into tobacco sheets.

According to the method of the present invention, wherein said medium solution is a kind of colloidal aqueous solution, comprises following composition:

Sodium carboxymethyl cellulose 0.5～2.5%

Sheet glue 10～40%

Xylitol 1～2%

Xanthan gum 1～2%

Phosphoric acid 1～5%

Water 40～80%

According to the method of the present invention, the adhesives include: cellulose derivative adhesives; bio-based adhesives; protein-based adhesives; polyester-based adhesives or mixtures thereof.

According to the method of the present invention, the auxiliary materials used therein include: flavors and fragrances and polysaccharide humectants.

According to the method of the invention, the weight ratio of the wood pulp-medium solution to the smoke powder is 1:1.5-2.5, and the auxiliary materials account for 2-5% of the weight of the smoke powder.

The present invention will be described in detail below.

The invention relates to a method for preparing tobacco sheet by uniformly blending wood pulp fibers into tobacco powder, the method comprising the following steps:

(1) dissolving the wood pulp fiberboard into single fibers in water to obtain a wood pulp solution with a fiber concentration of 1-15%;

(2) Add the wood pulp solution obtained in step (1) into the medium solution, then add the adhesive, stir for 1-3 hours, and make it fully mixed with the wood pulp solution, thus making the single fiber evenly distributed in the medium solution;

(3) Mix the wood pulp-medium solution obtained in step (2), tobacco sheet auxiliary materials and smoke powder evenly, and then press the obtained mixture into tobacco sheet.

In the method of the present invention, the method of disintegrating the wood pulp fiberboard into individual fibers is well known to those skilled in the art. For example, the wood pulp fiberboard is firstly soaked in water at 30-60°C, and then hydrolyzed and loosened into individual fibers in a fiber dissolving machine under high-speed stirring to obtain an aqueous solution of individual fibers.

The medium solution used in the inventive method is a kind of colloid aqueous solution, comprises following composition:

Sodium carboxymethyl cellulose 0.5～2.5%

Sheet glue 10～40%

Xylitol 1～2%

Xanthan gum 1～2%

Phosphoric acid 1-5%

Water 40-80%.

The adhesives used in the method of the present invention include: cellulose derivative adhesives, including sodium carboxymethylcellulose and modified starch CMSA; biological adhesives; protein adhesives; polyester adhesives or the mixture of these adhesives.

According to the method of the present invention, wherein said cellulose derivative adhesive includes sodium carboxymethyl cellulose and modified starch CMSA; said biological adhesive includes xanthan gum, etc.; said protein adhesive includes chitin , bone glue, gelatin, etc.; the polyester adhesive includes polyvinyl acetate, etc.

According to the method of the present invention, the amount of adhesive used is 2-8% by weight of smoke powder.

The auxiliary materials used in the method of the present invention include flavors and fragrances and polysaccharide humectants. Wherein, the flavor and fragrance include perilla scape and coffee ketone; the polysaccharide humectants include xylitol, sorbic acid and the like.

According to the method of the present invention, the weight ratio of the wood pulp-medium solution to the smoke powder is 1:1.5-2.5, and the auxiliary materials account for 2-5% of the weight of the smoke powder.

According to the method of the present invention, the wet-decomposed single fiber is directly mixed with the medium solution without dehydration, so that the single fiber is evenly distributed in the medium solution, and then the obtained mixed solution is uniformly mixed with smoke powder to make a tablet.

Adopt the method described in the present invention, can obtain the tobacco sheet that the blending amount of wood pulp fiber is 2-5% (by the weight of smoke powder), and the physical properties such as intensity, burst resistance, toughness of the obtained tobacco sheet And the effective utilization rate of the raw tobacco powder is significantly improved, and the obtained tobacco sheet does not have bad phenomena such as "bloomy flakes" and "white flakes".

The method of the present invention will be further described below in conjunction with the examples. However, it should be understood that the examples are only to illustrate the present invention, not to limit the present invention.

Example 1

Put 300Kg of water at normal temperature into a high-efficiency high-concentration defibrillator with a volume of 1m ³ (ZSG-1m ³ produced in Zhucheng), then add 30Kg of wood pulp fiberboard, and directly defibrate the fiberboard into single fibers to obtain the concentration 10% wood pulp. The dissolving time is 45 minutes, and the fiber amount in the solution is 30Kg.

10Kg sodium carboxymethyl cellulose (CMC), 100Kg flake glue, 10Kg xylitol, 10Kg xanthan gum, 500g 3% perilla alcoholic solution, 10Kg phosphoric acid are added in 100Kg water, mix to obtain medium solution, then Add the wood pulp fiber solution obtained above into the medium solution, stir thoroughly to make it fully mixed. The stirring time was 2 hours, thereby obtaining a solution in which single fibers were evenly distributed in the medium solution. 540Kg of the wood pulp medium solution obtained above is quantitatively transported and uniformly mixed with 1000Kg of tobacco powder, and then pressed into sheets and shredded (this step is common to tobacco sheet making equipment by rolling method).

The physical properties of the tobacco sheet thus obtained are as follows:

Tensile strength: longitudinal 428CN/mm ² , transverse 280CN/mm ²

Tear strength: longitudinal 127CN/mm ² , transverse 169CN/mm ²

Effective utilization rate of flakes: 93% (referring to the ratio of smoke powder outlet to the amount added)

Example 2-6

Adopt the method step identical with embodiment 1 to prepare tobacco sheet, just wood pulp fiber consumption is different, see table 1:

Table 1 Element Example 2 Example 3 Example 4 Example 5 Example 6 Wood pulp fiber(Kg) 10 20 25 30 35 Smoke powder(Kg) 1000 1000 1000 1000 1000 Medium solution (Kg) 540 540 540 540 540 Table 2 shows the physical properties of the tobacco sheets prepared according to Examples 2-6.

Table 2 physical properties Example 2 Example 3 Example 4 Example 5 Example 6 Tensile strength (CN/mm ² ) portrait 219 268 347 428 420 horizontal 118 176 246 280 254 Tear strength (CN/mm ² ) portrait 197 113 120 127 136 horizontal 87 146 138 169 181 Effective utilization rate of flakes (%) 89 92 91 93 92.5

Note: Several examples are just to illustrate the different effects of adding different fiber ratios on tobacco sheets, so except for the amount of wood pulp fiber added, the amount of other ingredients added is the same.

The tobacco flakes obtained by the method of the invention have no "white spots" and "flower flakes", and the physical properties are obviously improved. Compared with the tobacco sheet prepared according to the prior art, the tensile strength is increased by 128%, the tear degree is increased by 56%, and the effective utilization rate of the sheet is increased by 3-5%. In addition, the implementation of the method of the present invention can be carried out on the original tobacco sheet production line, and less equipment needs to be added, so the investment in additional equipment is small, the process is simple, the amount of fiber addition is small, and the effect is obvious.

The present invention has been described above in conjunction with the embodiments. But it should be understood that the method of the present invention is not limited thereto. Without departing from the essence and spirit of the present invention, modifications and supplements to the present invention by those skilled in the art all fall within the protection scope of the present invention.

Claims (8)

1. A method for preparing tobacco flakes by evenly blending wood pulp fibers in smoke powder, comprising the following steps: (1) dissolving the wood pulp fiberboard into single fibers in water to obtain a wood pulp solution with a fiber concentration of 1-15%; (2) Import the wood pulp solution obtained in step (1) into the medium solution, add the binder, and stir for 1-3 hours to fully mix it with the wood pulp solution, thereby making the single fiber evenly distributed in the medium in solution; (3) Mix the wood pulp-medium solution obtained in step (2), sheet auxiliary materials and smoke powder evenly, and then press the obtained mixture into tobacco sheets. 2. The method according to claim 1, wherein said medium solution is a colloidal aqueous solution comprising the following components: Sodium Carboxymethyl Cellulose 0.5～2.5% Sheet glue 10～40% Xylitol 1～2% Xanthan gum 1～2% Phosphoric acid 1～5% Water 40～80% 3. The method as claimed in claim 1, wherein said adhesive comprises: cellulose derivative adhesives, including sodium carboxymethyl cellulose and modified starch CMSA; biological adhesives; protein adhesives; polyester Adhesives or mixtures thereof. 4. The method according to claim 3, wherein said bio-based adhesive includes xanthan gum; said protein-based adhesive includes chitin, bone glue, and gelatin; and said polyester-based adhesive includes polyvinyl acetate. 5. The method as claimed in claim 1, wherein the auxiliary materials used include flavors and fragrances and polysaccharide humectants. 6. The method according to claim 5, wherein said essence and fragrance include perilla scape and coffee ketone; said polysaccharide humectants include xylitol and sorbitol. 7. The method according to claim 1, wherein the weight ratio of the wood pulp-medium solution to the smoke powder is 1:1.5-2.5, and the auxiliary materials account for 2-5% of the weight of the smoke powder. 8. The method as claimed in claim 1, wherein the added amount of wood pulp fiber is 1-5% (by weight).