WO2019001014A1

WO2019001014A1 - Heat-resistant paper for tobacco products capable of not burning under heating

Info

Publication number: WO2019001014A1
Application number: PCT/CN2018/078789
Authority: WO
Inventors: 艾明欢; 陆闻杰; 杨菁
Original assignee: 上海新型烟草制品研究院有限公司; 上海烟草集团有限责任公司
Priority date: 2017-06-28
Filing date: 2018-03-13
Publication date: 2019-01-03
Also published as: CN107419613A

Abstract

Heat-resistant paper for cigarettes capable of not burning under heating, and use of the heat-resistant paper in cigarettes capable of not burning under heating as cigarette paper. The heat-resistant paper comprises the following raw material components in percentage by weight: 50-70% of wood pulp fiber, 20-49% of calcium carbonate, and 1-10% of hydroxide.

Description

Heat-resistant paper for heating non-burning tobacco products

Technical field

The present invention relates to a heat resistant paper, and more particularly to a heat resistant paper for heating non-burning cigarettes.

Background technique

Compared with traditional cigarettes, heating non-combustion tobacco products only heats the tobacco without burning. Generally, the heating temperature is lower than 350 ° C, and the active ingredients in the tobacco are mainly released by distillation, and the cracking reaction does not occur, so the harm is much smaller than the traditional cigarette. . As the public becomes more concerned about health, heating non-combustible tobacco products is receiving increasing attention.

At present, iQOS, Ploom, REVO, Eclipse, CORE, PAX and other heating non-combustion products have been listed, and have gradually gained recognition from some traditional smokers. However, the conventional cigarette paper in the prior art is prone to burning or cracking when the heating temperature is 300 to 350 ° C; it does not meet the requirements for heating the non-burning cigarette. Therefore, the cigarette paper used in heating non-burning cigarettes is completely different from the traditional cigarette papers involved in burning, and there are few public reports.

The use of heated non-combustible products for heating without burning places new demands on the paper for crimping, which is to withstand a certain temperature and is not easy to burn. At the same time, the heat-resistant paper needs to generate no odor under heating conditions, so as not to affect the quality of the flue gas of the heated non-combustion product. There is no paper in the prior art that solves the above problems.

Summary of the invention

In view of the above-discussed deficiencies of the prior art, it is an object of the present invention to provide a heat-resistant paper for heating non-combustible cigarettes for solving the problems in the prior art.

To achieve the above and other related objects, the present invention has been achieved by the following technical solutions.

The present invention provides a heat-resistant paper for heating non-combustible cigarettes, characterized in that the heat-resistant paper comprises the following raw material components and weight percentages based on the raw material components of the heat-resistant paper:

Wood pulp fiber 50~70%

Calcium carbonate 20 to 49%

Hydroxide 1 to 10%.

Preferably, the hydroxide is a hydroxide which undergoes endothermic decomposition in a temperature range of from 150 ° C to 350 ° C. More preferably, the hydroxide is one or both of aluminum hydroxide or magnesium hydroxide.

Preferably, the wood pulp fibers comprise long fibers and short fibers. The length of the long fibers is greater than 1 mm and not more than 10 mm. The long fibers have a fineness of 2.0 to 5.0 dtex. Preferably, the short fibers have a length of 0.1 to 1 mm.

Preferably, the mass ratio of the long fibers to the short fibers is 1: (1 to 5). More preferably, the mass ratio of the long fibers to the short fibers is 1: (2 to 4).

The invention also discloses a preparation method of the heat-resistant paper as described above, which comprises mixing and mixing the raw material components; and forming a paper.

The invention also discloses the use of aluminum hydroxide or/and magnesium hydroxide as a filler for improving the heat resistance of cigarette paper.

The invention also discloses the use of the heat-resistant paper described above as a cigarette paper in heating non-burning tobacco.

The present invention also discloses a non-burning cigarette, using a heat resistant paper as described above.

When the heat-resistant paper of the present invention is used for heating non-combustion tobacco products, the heating temperature is generally about 350 ° C. At this higher temperature, the conventional cigarette paper in the prior art will burn and be prone to cracking. And using the heat-resistant paper of the present application, by improving the formulation and the process, combining wood pulp fiber, calcium carbonate and hydroxide, the heat resistance is greatly increased, especially under the heating condition, the hydroxide will occur. Endothermic decomposition (magnesium hydroxide thermal decomposition temperature is 300 ° C, aluminum hydroxide thermal decomposition temperature is 200 ° C), reducing the heat of heat of heat-resistant paper, avoiding or delaying the heat-heating paper further increase in heat temperature, improve heat resistance The thermal stability of the paper under the conditions of use; thus effectively avoiding the disadvantage of poor heat resistance of paper used in heating non-burning cigarettes. At the same time, the hydroxide only generates inorganic oxide and water when heated, does not produce any odor, does not produce any toxic and harmful products, and has good safety.

As described above, a heat-resistant paper according to the present invention has the following advantageous effects:

1) Heat-resistant paper meets the temperature resistance requirements under the conditions of heating and non-combustion of tobacco products.

2) The heat of the hydroxide in the heat-resistant paper absorbs heat by heat and can effectively suppress the rise of temperature and suppress the tendency of fire.

3) The tension, smoothness and thickness of heat-resistant paper can meet the requirements of heating non-burning cigarettes, and the molding performance is good, which is suitable for large-scale industrial production.

4) The decomposition products of heat-resistant paper are only inorganic oxides and water, no odor, no harm, safe and hygienic.

DRAWINGS

Figure 1 is a graph showing the effect of heat treatment at 350 ° C for 3 minutes on paper whiteness of different hydroxide contents.

Figure 2 shows the thermogravimetric map.

Figure 3 is a differential thermal analysis map.

Figure 4 shows the effect of different amounts of aluminum hydroxide on the degradation properties of heat-resistant paper fibers when heat-treated at 350 °C for 3 minutes.

Figure 5 is a graph showing the effect of different contents of magnesium hydroxide on the degradation properties of heat-resistant paper fibers when heat-treated at 350 ° C for 3 minutes.

Detailed ways

The embodiments of the present invention are described below by way of specific embodiments, and those skilled in the art can readily understand other advantages and functions of the present invention from the disclosure.

Before the present invention is further described, it is to be understood that the scope of the present invention is not limited to the specific embodiments described below; It is not intended to limit the scope of the invention. The test methods which do not specify the specific conditions in the following examples are usually carried out according to conventional conditions or according to the conditions recommended by each manufacturer.

When the numerical values are given by the examples, it is to be understood that the two endpoints of each numerical range and any one of the two. Unless otherwise defined, all technical and scientific terms used in the present invention have the same meaning meaning In addition to the specific methods, devices, and materials used in the embodiments, the methods, devices, and materials described in the embodiments of the present invention may also be used according to the prior art and the description of the present invention by those skilled in the art. Any method, apparatus, and material of the prior art, similar or equivalent, is used to practice the invention.

Inventive Example 1 is a comparative example containing no calcium carbonate and hydroxide; Examples 2 to 4 are comparative examples in which no hydroxide is added. Embodiments 5 to 14 are embodiments of the technical solutions in the present application. In the examples, the preparation methods are: mixing and mixing the raw material components; forming by a papermaking process.

In the wood pulp fiber of the embodiment of the present application, the length of the long fiber is greater than 1 mm and not more than 10 mm; and the length of the short fiber is 0.1 to 1 mm.

Example 1

The process is carried out according to the production of 1 ton of heat-resistant paper: 700 kg (70% by weight) of short fibers and 300 kg (30% by weight) of long fibers are added to the mixing tank, and they are uniformly mixed in the mixing tank. , according to the conventional production process of cigarette paper for papermaking. The heat resistant paper was named 0% calcium carbonate.

Example 2

The process is carried out according to the production of 1 ton of heat-resistant paper: 630 kg (63% by weight) of short fiber, 270 kg (27% by weight) of long fiber and 100 kg of calcium carbonate (10% by weight) are added to the mixing tank. ), and mixing them evenly in the sizing tank, and making the paper according to the conventional production process of the cigarette paper. The heat resistant paper was named 10% calcium carbonate.

Example 3

The process is carried out according to the production of 1 ton of heat-resistant paper: 560 kg (56% by weight) of short fiber, 240 kg (24% by weight) of long fiber and 200 kg of calcium carbonate (20% by weight) are added to the mixing tank. ), and mixing them evenly in the sizing tank, and making the paper according to the conventional production process of the cigarette paper. The heat resistant paper was named 20% calcium carbonate.

Example 4

The process was carried out according to the production of 1 ton of heat-resistant paper: 490 kg (49% by weight) of short fiber, 210 kg (21% by weight) of long fiber and 300 kg of calcium carbonate (30% by weight) were added to the mixing tank. ), and mixing them evenly in the sizing tank, and making the paper according to the conventional production process of the cigarette paper. The heat resistant paper is named Control or 30% calcium carbonate.

Example 5

According to the production process of 1 ton of heat-resistant paper: 10 kg of aluminum hydroxide filler (1% by weight), 483 kg of short fiber (48.3% by weight) and 207 kg of long fiber (weight percent) 20.7%), 300 kg of calcium carbonate (30% by weight), and evenly mixed in a sizing tank, and made into a paper according to the conventional production process of cigarette paper. The heat resistant paper is named Al1.

Example 6

According to the production process of 1 ton of heat-resistant paper: 50 kg of aluminum hydroxide filler (5% by weight), 455 kg of short fiber (45.5% by weight) and 195 kg of long fiber (weight percent) 19.5%), 300 kg of calcium carbonate (30% by weight), and evenly mixed in a mixing tank, and made into a paper according to the conventional production process of cigarette paper. The heat resistant paper is named Al5.

Example 7

According to the production process of 1 ton of heat-resistant paper: 100 kg of aluminum hydroxide filler (10% by weight), 420 kg of short fiber (42% by weight) and 180 kg of long fiber (weight percent) 18%), 300 kg of calcium carbonate (30% by weight), and evenly mixed in a mixing tank, and made into a paper according to the conventional production process of cigarette paper. The heat resistant paper is named Al10.

Example 8

The process was carried out according to the production of 1 ton of heat-resistant paper: 10 kg (1% by weight) of magnesium hydroxide filler was added to the mixing tank, 483 kg of short fiber (48.3% by weight) and 207 kg of long fiber (% by weight) 20.7%), 300 kg of calcium carbonate (30% by weight), and evenly mixed in a sizing tank, and made into a paper according to the conventional production process of cigarette paper. The heat resistant paper was named Mg1.

Example 9

According to the production process of 1 ton of heat-resistant paper: 50 kg of magnesium hydroxide filler (5% by weight), 455 kg of short fiber (45.5% by weight) and 195 kg of long fiber (weight percent) 19.5%), 300 kg of calcium carbonate (30% by weight), and evenly mixed in a mixing tank, and made into a paper according to the conventional production process of cigarette paper. The heat resistant paper was named Mg5.

Example 10

The process is carried out according to the production of 1 ton of heat-resistant paper: 100 kg of magnesium hydroxide filler (10% by weight), 420 kg of short fiber (42% by weight) and 180 kg of long fiber (weight percentage) 18%), 300 kg of calcium carbonate (30% by weight), and evenly mixed in a mixing tank, and made into a paper according to the conventional production process of cigarette paper. The heat resistant paper was named Mg10.

Example 11

According to the production process of 1 ton of heat-resistant paper: 10 kg of aluminum hydroxide filler (1% by weight), 350 kg of short fiber (35% by weight) and 150 kg of long fiber (weight percent) 15%), 490 kg of calcium carbonate (49% by weight), and evenly mixed in a mixing tank, and made into a paper according to the conventional production process of cigarette paper.

Example 12

According to the production process of 1 ton of heat-resistant paper: 50 kg of magnesium hydroxide filler (10% by weight), 400 kg of short fiber (40% by weight) and 150 kg of long fiber (weight percent) 15%), 400 kg of calcium carbonate (40% by weight), and evenly mixed in a mixing tank, and made into a paper according to the conventional production process of cigarette paper.

Example 13

The process is carried out according to the production of 1 ton of heat-resistant paper: 100 kg (10% by weight) of magnesium hydroxide filler is added to the mixing tank, 500 kg of short fiber (50% by weight) and 200 kg of long fiber (% by weight) 20%), 200 kg of calcium carbonate (20% by weight), and evenly mixed in a mixing tank, and made into a paper according to the conventional production process of cigarette paper.

Example 14

According to the production process of 1 ton of heat-resistant paper: 80 kg (8% by weight) of magnesium hydroxide filler, 470 kg of short fiber (47% by weight) and 200 kg of long fiber (weight percentage) 20%), 250 kg of calcium carbonate (25% by weight), and evenly mixed in the mixing tank, and made according to the conventional production process of cigarette paper.

The heat resistant paper samples prepared in the above Examples 1 to 10 were subjected to heat resistance test.

1 (RT means room temperature conditions) shows that the addition amounts of 1%, 5%, and 10% of hydroxides in Examples 5 to 10 are compared with the control sample in Example 4 in which no hydroxide is added; The addition of alumina or magnesium hydroxide helps to increase the whiteness value of the heat-resistant paper after heating at 350 ° C for 3 min.

2 is a thermogravimetric map of heat-resistant paper; FIG. 2 and Table 1 show that aluminum hydroxide or magnesium hydroxide is added to Examples 5 to 10 under different temperature conditions from 30 ° C to 550 ° C. The residual weight percentage of the heat resistant paper was higher than that of the Control sample of Example 4; the more the remaining weight percentage, the more the degradation.

3 is a differential thermal analysis spectrum, and FIG. 3 and Table 2 show that aluminum hydroxide or magnesium hydroxide (addition amount of 1%, 5%, and 10%) is added to Examples 5 to 10 from 300 ° C to 550 ° C. The heat-resistant paper heat release amount was higher than that of the Control sample in Example 4.

Table 1 Residual weight percentage of the sample in Figure 2 at different temperatures

Table 2 Thermal performance parameters of the sample in Figure 3

Figures 4 and 5 show the effect of different levels of hydroxide on the degradation properties of heat-resistant paper fibers when heat-treated at 350 °C for 3 minutes. 4 shows that the wood fibers in the heat-resistant papers to which aluminum hydroxide (1%, 5%, and 10% are added) in Examples 5 to 7 were significantly thicker than the Control sample after heat treatment at 350 ° C for 3 minutes. Fig. 5 shows that the wood fibers in the heat-resistant papers to which magnesium hydroxide (1%, 5%, and 10% are added) in Examples 8 to 10 were significantly thicker than the Control sample after heat treatment at 350 ° C for 3 minutes. Under the heated condition, the hydroxide will undergo endothermic decomposition (the decomposition temperature of magnesium hydroxide is 300 ° C, and the decomposition temperature of aluminum hydroxide is 200 ° C), which reduces the heat of heat of the heat-resistant paper, and avoids or delays the heat of heat-resistant paper. The further increase of the temperature improves the thermal stability of the heat-resistant paper under the use conditions; the decomposition products of the heat-resistant paper are only inorganic oxides and water, no odor, no harm, safety and hygiene.

All of the above indicate that the technical solution of adding calcium carbonate and hydroxide into the wood pulp fiber in the technical solution of the present application improves the thermal stability of the heat resistant paper; the heat resistance at 350 ° C is better, and does not burn. The problem that the conventional cigarette paper in the prior art is burned and easily broken is solved.

The heat-resistant paper in the embodiments 5 to 14 of the present application can satisfy the use requirements of heating non-burning cigarettes, has good molding performance, and is suitable for large-scale industrial production.

The above-described embodiments are merely illustrative of the principles of the invention and its effects, and are not intended to limit the invention. Modifications or variations of the above-described embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, all equivalent modifications or changes made by those skilled in the art without departing from the spirit and scope of the inventions are still to be covered by the appended claims.

Claims

A heat-resistant paper for heating non-burning cigarettes, characterized in that, according to a raw material component of the heat-resistant paper, the heat-resistant paper comprises the following raw material components and weight percentages:

Wood pulp fiber 50~70%

Calcium carbonate 20 to 49%

Hydroxide 1 to 10%.
The heat-resistant paper according to claim 1, wherein the hydroxide is a hydroxide which undergoes endothermic decomposition in a temperature range of from 150 ° C to 350 ° C.
The heat resistant paper according to claim 1, wherein the hydroxide is one or both of aluminum hydroxide or magnesium hydroxide.
The heat resistant paper according to claim 1, wherein the wood pulp fibers comprise long fibers and short fibers.
The heat-resistant paper according to claim 4, wherein the long fibers have a length of more than 1 mm and not more than 10 mm; and the short fibers have a length of 0.1 to 1 mm.
The heat-resistant paper according to claim 4, wherein a mass ratio of the long fibers to the short fibers is 1: (1 to 5).
A method for preparing a heat-resistant paper according to any one of claims 1 to 6, wherein each of the raw material components is mixed and formulated, and formed according to a papermaking process.
The use of aluminum hydroxide or/and magnesium hydroxide as a filler for improving the heat resistance of cigarette paper.
Use of the heat-resistant paper according to any one of claims 1 to 6 as a cigarette paper in heating non-burning tobacco.
A non-burning cigarette comprising the heat-resistant paper according to any one of claims 1 to 6.