KR101442102B1 - Reconstituted tobacco sheet comprising a nanofibrillated cellulose and a manufaturing method of the same - Google Patents

Abstract

The present invention relates to a method for making a sheet of tobacco comprising an addition step of adding a sheet of tobacco comprising Nanofibrillated Cellulose (NFC) and Nanofibrillated Cellulose (NFC). According to the present invention, it is possible to provide a new plate-shaped leaf and a method for manufacturing the same which can improve the strength and rigidity of the plate-shaped leaf and ultimately increase the swelling of the plate-shaped leaf in place of the existing polymer electrolyte-

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a nano-fibrillated cellulosic sheet,

The present invention relates to a plate leaf comprising nano-fibrillated cellulose and a method of making the same.

Reconstituted Tobacco Sheet is a paper-like reconstituted tobacco leaf made from tobacco leaf by-products, and is used to fill in the cigarette-shaped tobacco that has been bent. The tobacco leaf, which is a raw material of tobacco, is divided into tobacco leaves which are the main ingredients of tobacco, and tobacco leaf stems which form the skeleton of tobacco leaves but can not be used as tobacco raw materials. The tobacco leaves are produced by pulping, extracting, grinding and grinding various kinds of by-products generated in the process of manufacturing tobacco leaves and cigarettes to produce a sheet-like product similar to tobacco leaves and then applying the extract prepared in advance thereto .

Since the leaves of the tobacco leaves are mainly produced by processing the tobacco leaves, they are weak in strength and stiffness due to the poor bonding of fibers to wood pulp, which is a raw material of general paper, due to the characteristics of raw materials. In particular, due to the lack of stiffness of the sheet, the rolled sheet is too flexible to fill the cigarette too tightly, resulting in a reduction in the volume of filling per unit weight of the sheet.

Inflatability refers to the filling power of each second of the cigarette and is measured with a densimeter. If the inflated puffiness is poor, a relatively large amount of the frozen leaf is required to produce the same volume of cigarette tobacco, which raises the price of the cigarette. In fact, the inflorescence of the domestic leaf is less than 5 cc / g, which means that more than 20% of the raw material is required to fill the same cigarette-like cigarette compared to the inflated core having the inflation rate of 6 cc / g or more.

In order to overcome the above-mentioned problems, it is possible to consider various kinds of paper strength enhancers which have been generally applied in the conventional paper making process to improve the strength and rigidity of the paper leaf, but the paper strength strengthening agent causes excessive aggregation of the paper leaf material In addition, it can not be applied to the manufacture of cigarettes, which are preference foods, because of the lack of certification for food additives. In other words, a synthetic or natural polymer electrolyte paper strengthening agent for papers is not a tobacco leaf ingredient, and it is an additive that can not be added to foods, so it can not be applied to the production of a tobacco sheet.

However, the production method of the so-called tobacco leaves so far does not sufficiently satisfy the demand for improvement of such inflated properties.

For example, Korean Patent Laid-Open No. 10-2007-0035613 discloses an improved sheet of tobacco containing up to about 80% by weight of wood pulp, up to about 30% by weight of binder and up to about 80% by weight of tobacco, 2006-0004975 discloses a method of manufacturing a recycled tobacco product by a simple method, but these have no improvement and no awareness of the infliction.

Therefore, it is urgently required to develop a new technique for reducing the production unit cost of the cigarette tobacco by improving the inflated state of the tobacco leaf.

Korean Patent Publication No. 10-2007-0035613 Korean Patent Publication No. 10-2006-0004975

The present invention relates to a process for improving the puffiness of a leaf of a leaf by using a Nanofibrillated Cellulose (NFC) nanofibrillating material as a raw material for manufacturing a plate leaf, It is an object of the present invention to provide a novel leaf blade and a method for manufacturing the leaf blade which improve the strength and rigidity of the leaf blade and ultimately increase the swelling of the leaf blade.

To this end,

The method comprising the steps of adding nanofibrillated cellulose (NFC) to a substrate.

The present invention also provides a plate top sheet comprising nanofibrillated cellulose (NFC).

According to the method of manufacturing a leaf blade of the present invention, by applying the nanofibrillated cellulose to the production process of the leaf blade, the binding area and the binding ability of the beryllium particles are improved, It is possible to improve the strength and stiffness of the upper leaves and ultimately increase the swelling of the upper leaves.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of a process of a method for manufacturing a tobacco sheet of the present invention. FIG.

Hereinafter, the present invention will be described in more detail.

In the present invention, a method of nanofibrating a raw material such as wood pulp or biomass to prepare Nanofibrillated Cellulose (NFC) and then adding it to the manufacturing process of the leaf sheet has been devised. Cellulose is one of the most renewable and abundant natural polymeric materials available from biomass and accounts for about 40% to 50% of the chemical composition of almost all plants. Therefore, various chemicals and plastic materials As a substitute resource to produce.

Synthetic high molecular weight additives mainly used in the papermaking process are polymers based on fossil fuels. They are a major drawback of depletion of fossil fuels, difficulty in regeneration, and environmental load generated at the time of disposal, There is growing interest in biopolymers. Therefore, the conversion of petroleum-based polymers to natural polymers has been attempted, and nanofibrillated cellulose (NFC) has recently attracted a great deal of attention in the above-mentioned aspect. The NFC is produced by a process of separating cellulose nanofibers chemically and mechanically from plant fiber bundles. Since NFC is strongly crystallized by hydrogen bonding, it has a strength of 5 times that of an iron metal, and has a strength of 1/10 It is not only an excellent material with the following coefficient of linear thermal expansion but also occupies more than 50% of the plant resources such as wood, and can be said to be almost endless resource. Nano-sized nano-fibrillated cellulose (NFC) has a large specific surface area and many couplers as compared with other fibers, and has a relatively low weight, biodegradability and regenerability, and high strength and rigidity. It is suitable for use for increasing strength and rigidity. In addition, nanofibrillated cellulose (NFC) is manufactured from wood pulp or biomass, which is a raw material of the plate leaf, and thus there is an advantage that authentication of food addition is not necessary. However, the use of nano-fibrillated cellulose (NFC) has been reported for composites and nonwoven fabrics, absorbent webs, paper board feeders, foods, cosmetics, and filter filters. However, Technological developments for improvement of gender are negligible.

The nano-fibrillated cellulose (NFC) may be prepared by a method of nanoing a raw material of a sheet-like leaf, preferably wood pulp or biomass by a physical method, in particular, a method using grinding or a homogenizer . At this time, the microfibrils constituting the cell wall of the wood fibers are isolated at the nanoscale, which is the disassembly of the cell wall structure, not the destruction of the fibrous cell wall.

The nanofibrillated cellulose (NFC) prepared as described above may be added during the production of the leaf sheet. FIG. 1 is a schematic view of a process of a method for manufacturing a tobacco sheet according to the present invention, wherein the position where nanofibrillated cellulose (NFC) can be added during the manufacturing process of the tobacco sheet is indicated. The manufacturing process of the plate leaf of the present invention can be carried out in a manufacturing process as shown in Fig. 1, by injecting it into a wet-end, mixing it with a size liquid of an extractive liquid storage tank, Fibrillated cellulose (NFC) can be included in the plate leaf.

In addition, nanofibrillated cellulose (NFC) can be blended with the raw sheet material of the plate, so it is also possible to directly blend the raw material with the sheet material. Specifically, nanofibrillated cellulose (NFC) can be retained in the papermaking process, so that it can be introduced before the head box of the paper machine in order to improve the strength and rigidity of the sheet.

In addition, nanofibrillated cellulose (NFC) is easily mixed with the extract of the tobacco leaf which is used as the size liquid, and is applied to the leaf sheet through the size processing, and is effective for improving the strength and rigidity. In addition, NFC was effective in improving the strength and stiffness of the sheet, even when sprayed on wire during the papermaking process.

The plate leaf comprising Nanofibrillated Cellulose (NFC) produced by the above method is distributed on the surface of the beryllium particles having relatively weak binding force with the nano-fibrillated cellulose (NFC) contained therein As the bond area and the bond strength are increased simultaneously, the strength and rigidity are increased, and as a result, the swelling of the sheet can be improved.

The present invention is the first to improve the strength and stiffness of the sheet and to increase the swelling of the sheet by applying NFC in various ways in the production of the sheet. Various kinds of paper strength enhancer generally applied to the conventional paper making process to improve the strength can be utilized for improving the strength and rigidity of the paper leaf, but the paper strength enhancer not only causes excessive aggregation of the paper leaf material, Can not be applied to the manufacture of cigarettes, which are preferential foods. Therefore, in order to apply it to the plate leaf, it must be a component used as a raw material of the plate leaf or have been certified as a food additive. Therefore, wood pulp or biomass is processed into Nanofibrillated Cellulose (NFC) The present invention applied to the manufacturing process of the topsheet is more effective than the conventional method of manufacturing the topsheet. In particular, the treatment of the newly developed Nanofibrillated Cellulose is expected to contribute to the reduction of raw material costs for filling the cigarette type cigarette as the swelling of the leaf is improved. In this case, the manufacture of high quality cheap cigarettes Is possible.

The present invention will be described in detail with reference to Examples, but the present invention is not limited to these Examples.

Example  One

The raw materials of the tobacco leaves were collected from the head box of T company, The raw materials collected at the production site contained 2.3% suspended solids, and the suspended solids contained 40% fiber and 60% fine powder. It was predicted that 12% of the total suspended solids would result in aseptic strength failure of ash leaves. A weeping paper having a basis weight of 65 g / m ² was prepared from the sheet material. At this time, work and retention were less than 45%.

The size press solution was collected in the extract liquid storage tank of the T company which is a maker of the leaf. The concentration of the size liquid collected at the production site was 35%, the dissolved solid content was more than 33% and the suspended solid content was less than 2%.

The softwood bleached kraft pulp was treated with a laboratory grade Valley Beater to such an extent that it was impossible to measure the degree of freeness (0 mL CSF), and then pulverized and nanoized using Masuko's Super Masscolloider. The viscosity of 1% nano-sized NFC slurry was measured by a Brookfield viscometer at 2,500 cps. The Nanofibrillated Cellulose (NFC) thus prepared was mixed with the sizing solution in an amount of 1% based on the solids content.

The above-mentioned leaf weeds were sized using an inclined size press of GIST. At this time, the pick-up amount of the size liquid was adjusted to be 35 g / m ² , and the basis weight of the final size press-processed sheet was adjusted to 100 g / m ² to prepare a sheet.

Comparative Example  One

A sheet was prepared in the same manner as in Example 1, except that Nanofibrillated Cellulose (NFC) was added to the sizing solution.

Experimental Example  One: Edifice  Strength and stiffness evaluation

In order to examine the strength and stiffness of the sheet prepared in Example 1 and Comparative Example 1, the sheet was subjected to surface sizing, then folded, and its swelling was measured using a Burghart Densimeter. The results obtained above are shown in Table 1 below.

Swelling (cc / g) Example 1 6.2 Comparative Example 1 4.8

As can be seen from the measurement values of Comparative Example 1 and Example 1, when the nanofibrillated cellulose (NFC) prepared from softwood kraft pulp was blended in the sizing solution and subjected to surface sizing treatment, the swelling of the sheet was 29% Or more.

These results indicate that the nanofibrillated cellulose (NFC) treated on the sheet by mixing with the sizing liquid is distributed on the surface of the beryllium particles with relatively weak binding force, As a result, the cost of raw materials for filling cigarette-type cigarettes is expected to be reduced as a result of the improvement in the swelling of the leaves of the leaves. As a result, it is considered possible to manufacture cheap cigarettes of high quality. Thus, the strength and stiffness of the sheet can be improved by utilizing the raw material component rather than the conventional papermaking strengthening agent, so that the swellability can be improved.

Claims (7)

Comprising the step of adding nanofibrillated cellulose (NFC) prepared by nanofibrating wood pulp or biomass. delete The method according to claim 1,
Wherein the adding step comprises spraying nano-fibrillated cellulose onto the wire on which the wet paper is formed. The method according to claim 1,
Wherein the adding step comprises mixing nano-fibrillated cellulose with the pre-papermaking raw material. The method according to claim 1,
Wherein the adding step comprises mixing nano-fibrillated cellulose with the sizing solution. Plate comprising leaf Nanofibrillated Cellulose (NFC) prepared by nanofibrating wood pulp or biomass.
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