CN102094364A - Cigarette paper with low ignition tendency and preparation method thereof - Google Patents

Abstract

The invention relates to a cigarette paper with low ignition tendency and a preparation method thereof. There is at least one high thermal conductivity flame-retardant belt on the cigarette paper wrapped with shredded tobacco, and each flame-retardant ring belt is composed of a double layer coated with an inner layer and an outer layer, the inner layer is coated with flame-retardant colloid, and the outer layer Layer coating of high thermal conductivity and flame retardant materials, thus forming a high thermal conductivity and flame retardant tape coated with inner and outer double layers. When the lit cigarette burns to the flame-retardant zone and contacts with combustibles, the cigarette paper is not easy to burn and the temperature drops due to the existence of the inner flame-retardant layer; The temperature transmitted from the cone to the cigarette paper can be quickly transmitted, further reducing the burning tendency of the cigarette paper and reducing the possibility of igniting combustibles. The flame-retardant cigarette paper of the invention can meet the requirements of cigarettes with low ignition tendency, is cheap, practical and efficient, and can effectively reduce the ignition tendency of cigarettes.

Description

Cigarette paper with low ignition tendency and preparation method thereof

technical field

The invention relates to the technical field of cigarettes, in particular to a cigarette paper with low ignition tendency and a preparation method thereof.

Background technique

With the development of tobacco technology, "smoking and safety" and "smoking and health" have become the mainstream trend in the development of the tobacco industry. Safety is mainly limited from two aspects: one is to reduce the damage and pollution to the human body and the environment caused by the smoke generated by burning cigarettes; the other is to "reduce the tendency to catch fire" and prevent fires caused by smoking.

The center temperature of the cigarette butt is as high as 800-900°C, and its surface temperature is also 300-400°C, while the ignition point of general solid combustibles is around 200°C. Therefore, when the smoker is inadvertent or asleep, when the unextinguished cigarette falls on clothes, furniture or paper, it is very easy to cause a fire.

About 25 percent of all fires in the United States are caused by smoking, according to the American Burn Association and the U.S. federal government. About 900 people are killed each year, more than 250 people are injured, and economic losses amount to 400 million US dollars. There are more than 4,000 fires caused by smoking every year in our country.

After New York State of the United States took the lead in passing a decree requiring the state to have the full-length burning ratio of all cigarettes sold in the market not exceed 25% from June 28, 2004, it became the first in the world to enforce the reduction of cigarette ignitability standards After the region, the Canadian government, the California of the United States, etc. have also announced the same fire safety standards for cigarettes. Up to now, about one-third of the states in the United States have completed the legislation on cigarettes with low ignition tendency, and the European Union, Australia, South Africa and other countries are also starting to study, and it is expected that cigarettes with low ignition tendency will be completed in 2010-2011. legislation. It can be seen that cigarettes with low ignition tendency have become a research hotspot in the international tobacco circle at the present stage.

Contents of the invention

The object of the present invention is to provide a safe cigarette paper and its preparation method that can automatically extinguish the cigarette even if the burning cigarette is placed on the combustible material under the premise of discontinuous smoking, and reduces the tendency of ignition.

The technical scheme that the present invention solves technical problem is:

Use the existing flexo printing technology to print two printing tapes on the front and back of the tipping paper at the same position at the same time to form a flame-retardant tape. The width of the flame-retardant tape is 6-8mm. The whole cigarette has at least one such flame-retardant tape .

The material used for the inner flame retardant layer is cigarette flame retardant adhesive with low ignition tendency, which is coated on the inner layer of cigarette paper by flexo printing cylinder A to form a printing layer, and then dried quickly by drying equipment; and then passed through the second set of Flexo cylinder B is coated with the outer printing layer at the same position, forming a high thermal conductivity layer. The printing material of the high thermal conductivity layer is an inorganic salt or hydroxide powder with a high thermal conductivity, which is evenly dispersed by dispersants such as sodium stearate and sodium oleate, so that it is suitable for flexo printing. Fire retardant tape.

When a cigarette burns, the temperature at the center of the burning cone is about 800-900 degrees, while the temperature of the edge cigarette paper is about 200-300 degrees. When the lit cigarette burns to the flame-retardant zone and contacts with combustibles, the cigarette paper is not easy to burn and the temperature drops due to the existence of the inner flame-retardant layer; The temperature transmitted from the cone to the cigarette paper can be quickly transmitted, further reducing the burning tendency of the cigarette paper and reducing the possibility of igniting combustibles.

Description of drawings

Fig. 1 is a schematic diagram of a cigarette prepared by using the cigarette paper of the present invention.

Fig. 2 is a schematic diagram of the cigarette paper of the present invention.

Fig. 3 is a schematic diagram of a double-sided flexo printing device.

In the figure, 1- mouth stick, 2- forming paper, 3- tipping paper, 4- cigarette paper, 5- flame retardant tape, 6- flame retardant adhesive printing layer, 7- high thermal conductivity printing layer, 8- roller, 9 -Material trough, 10-Material trough, 11-rotating shaft, 12-rotating shaft, 13-rotating shaft, 14-roller, A-printing cylinder, B-printing cylinder, C-dryer, D-dryer.

Detailed ways

The present invention utilizes the existing flexo printing technology to print two printing tapes on the front and back of the tipping paper at the same position simultaneously to form a flame-retardant tape. more) such a flame retardant tape. The intervals between the three fire-retardant belts are the same.

The material used for the inner flame retardant layer is cigarette flame retardant adhesive with low ignition tendency. The flexo printing device shown in Figure 3 is used to print and coat simultaneously on both sides of the cigarette paper at the same position. The slots (9 and 10) are respectively placed cigarette flame-retardant adhesives with low ignition tendency and high thermal conductivity materials, and the roller A is coated on the inner layer of the cigarette paper 4 to form a printing layer 6, which is then dried quickly by drying equipment; The second flexo printing cylinder B coats the outer printing layer at the same position to form a high thermal conductivity layer 7. The two flexo printing equipment must be synchronized at the same speed to achieve the purpose of coating and printing at the same position. The printing material of the high thermal conductivity layer 7 is an inorganic salt (calcium carbonate, calcium bicarbonate, sodium chloride, sodium phosphate, sodium hydrogen phosphate or sodium dihydrogen phosphate) or hydroxide (magnesium hydroxide, hydroxide aluminum or zinc hydroxide) powder, uniformly dispersed by dispersants such as sodium stearate or sodium oleate (suitable for flexo printing), and the amount of dispersant is about 5% of the amount of inorganic salt or hydroxide. The two printing layers 6 and 7 simultaneously form the flame-retardant tape 5 of the cigarette. After flexo printing, the cigarette paper forms a double-coated cigarette paper with low ignition tendency as shown in FIG. 2 .

The flexo printing device shown in Figure 3 is composed of the first flexo printing device consisting of the printing cylinder A and the cylinder 8, the rotating shaft 11, the dryer C, the rotating shafts 12 and 13, and the second road consisting of the printing cylinder B and the cylinder 14. The flexo printing device and the dryer D are composed of a rotating shaft 11, a dryer C, and rotating shafts 12 and 13 between the two flexo printing devices. The drying machine C is placed between the rotating shaft 11 and the rotating shaft 12, and between the rotating shaft 13 and the drying machine D. Set up the second flexo printing unit.

When the cigarette paper passes through the first flexo printing device composed of printing cylinders A and 8, the inner layer 6 is coated, and the moving direction of the paper is changed through the rotating shaft 11, and the paper passes through the first dryer C to dry quickly, and the inner layer 6 is coated. After that, the cigarette paper passes through the rotating shafts 12 and 13 to change the direction of motion of the cigarette paper again, passes through the printing cylinders B and 14, coats the outer layer of the cigarette paper with a high thermal conductivity layer 7, and passes through the dryer D again, Allows the outer coating layer to dry quickly, thus completing the coating process of the inner and outer coats.

Claims (4)

1. the cigarette paper of a low ignition tendency, it is characterized in that cigarette props up the outer cigarette paper that coats of pipe tobacco and is provided with at least one high heat conductive flame-retarding band, every fire-retardant endless belt all is made of internal layer and the outer bilayer that applies, and internal layer is coated with fire-retardant colloid, the high heat conductive flame-retarding material of outer coating.

2. low ignition tendency cigarette paper according to claim 1 is characterized in that fire-retardant endless belt width is 6mm～8mm, overlaps on the inhibiting tape of internal layer and the outer field high heat conductive flame-retarding band position.

3. the preparation method of the cigarette paper of the described low ignition tendency of claim 1 is characterized in that on cigarette yew paper printing flexible printing press, adds a cover flexo device, and the positive and negative to cigarette paper prints respectively.

4. the preparation facilities of the cigarette paper of the described low ignition tendency of claim 1, it is characterized in that this device is by printing cylinder (A), the first road flexo device that cylinder (8) and hopper (9) constitute, rotating shaft (11), two drying machine (C, D), rotating shaft (12 and 13), and by printing cylinder (B), the second road flexo device that cylinder (14) and hopper constitute constitutes, three rotating shafts (11 are set between twice flexo device, 12 and 13), drying machine (C), drying machine (C) places between two rotating shafts (11 and 12), and the second road flexo device is set between another rotating shaft (13) and another drying machine (D).

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