JPS60224480A - Ribbon shaped cellulose stock material for being mixed in tobacco and production thereof - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Technical Field> The present invention provides a ribbon-shaped cellulose raw material for tobacco mixture, which can be used alone to produce artificial bamboo, and mixed with natural bamboo leaves to help weaken the carcinogenicity of tobacco, and its production. Regarding the method.

<Conventional technology> Traditionally, cigarettes have been made using natural tobacco leaves.

On the other hand, when smoking cigarettes, the smoke contains many carcinogenic and carcinogenic substances, which are known to be harmful to the human body. It is thought that the reason why conventional cigarettes made using tobacco are carcinogenic is that natural tobacco leaves contain many chemical components, and these components are inhaled along with the smoke when bamboo shoots are burned. In order to minimize the carcinogenic potential of tobacco smoke made from tobacco leaves, various proposals have been made for alternative raw materials that can be mixed with natural tobacco leaves or used alone to make artificial cigarettes.

For example, Japanese Patent Publication No. 54-16599, published by the same applicant as the present application, uses cellulose with an average degree of polymerization of 10 to 95 to produce extremely less irritating smoke, making it tasteless and odorless. It is disclosed that cigarettes having a similar smoking taste can be obtained.

However, since such cellulose with a low degree of polymerization is in powder form, when it is made into cigarettes, air passage becomes difficult and the cigarette burns out, so further technology is required to put it into practical use. In the above-mentioned publication, there is no mention of whether or not the cellulose raw material is carcinogenic.

On the other hand, various studies have been conducted on what causes the carcinogenicity of cigarette smoke. For example, the ll! held on October 6, 1988! In the ``Research on Low Carcinogenic Tobacco'' (Proceedings) by Sakio Ikeda and others at the 1988 Autumn Research Presentation of the Institute of Industrial Science, various types of cigarettes are considered to be highly carcinogenic, but when applied to the skin, the skin becomes irritated. The substance benzo(a)
) Based on the viewpoint that it is better to have as little pyrene (hereinafter referred to as BaP) in tobacco as possible, we used a special measuring device that can quantitatively measure BaP in bamboo leaves and average polymerization. The pulp density (DP) was varied, that is, DP=1100 (raw pulp).

BaP in cellulose of 180.140,100.75
are being measured. As a result, the BaP of the tobacco leaves used for the pieces is 49nf per paper roll, but the BaP is 7nf for one paper roll, and 10nf for the raw material 4lup? and discloses that cellulose having a DP in the range of 180 to 75 is lnf.

The present inventors focused on the fact that cellulose with a low average degree of polymerization contains less BaP, and when used alone or mixed with natural tobacco leaves, it is less likely to disappear. We have arrived at this invention as a result of gun intent research.

<Objective of the Invention> The present invention provides a ribbon-shaped cellulose raw material for mixing with a chisel, which generates an extremely small amount of BaP that affects carcinogenicity, ■ has a low concentration of fading during use, and has adjusted suction resistance, and its production. The purpose is to provide a method.

<Structure of the Invention> The object of the present invention is to provide a ribbon-shaped cellulose raw material for mixing with tobacco, which is unique to tobacco and is used by mixing with natural tobacco leaf raw material, the cellulose raw material having a DP2o01.
+ By using a ribbon-shaped cellulose raw material for tobacco mixing, which is formed into a ribbon by cutting a sheet made from cellulose below into a ribbon with a thickness corresponding to #111 the size of natural tobacco leaves in cigarettes. achieved.

If cellulose with a DP of 200 or less is used, less BaP will be generated. However, cellulose with a DP of 200 or less is powder-like and difficult to burn, and has a large suction resistance and will disappear if used as is. Therefore, if you make a sheet, cut it, and use it in a ribbon shape, there will be air circulation, which will reduce the suction resistance and make it less likely to disappear.

Another object of the present invention is a method for producing cellulose raw materials,
Steps to obtain alkali cellulose by treating cellulose such as No. 9 Lup with an aqueous alkaline solution, complete decomposition of the alkali cellulose and neutralize it to obtain cellulose with a DP of 200 or less, and a step to make a sheet using the cellulose. and a step of cutting the sheet into a size approximately corresponding to the size of natural takoyaki leaves in tobacco.

<Examples> The present invention will be specifically described below based on examples of the present invention with reference to the accompanying drawings. Before explaining the examples, a method for measuring the extraction of benzo('a)pyrene from combustion smoke of paper-wrapped bamboo shoots made using the cellulose raw material of the present invention will be explained.

Benzo(a)pyrene Extraction Measurement Method The smoking conditions in tobacco research are internationally determined as Yanagi conditions. According to it, 35 dt suction is to be performed at 2 see once per minute.

In the present invention, the above conditions, that is, 3 between 2
A prototype device capable of continuous suction at a ratio of 5-5 was fabricated and used for the extraction of BaP generated during the combustion test of cellulose raw materials according to the present invention. As mentioned above, this device uses a method that complies with international standard conditions, so
The test results of the present invention are expected to have a high correlation with the test results of combustion tests based on international standard conditions, and since continuous combustion is adopted, variations in the test results obtained can be minimized. It can be done less.

FIG. 1 shows an apparatus for extracting benzo(a)pyrene from cigarette combustion smoke used in the present invention.

In FIG. 1, 1 is a cigarette, 2° 2' is an adsorption tube that absorbs smoke when the cigarette 1 is burned, and benzene is placed inside this tube. It is a tube filled with 3 glass fibers, and 4 is a branch Erlenmeyer flask. 5Fi current meter, branch Erlenmeyer flask 4
The flow velocity of the gas being sucked from the branch part 6 is measured. Negative pressure is created in the triangular cigarette lighter 4 by suction from the outside, and the smoke from the lit cigarette 1 flows through the suction tubes 2 and 2' due to the negative pressure, and the smoke inside the suction tube is The components contained therein are adsorbed by benzene and then pass through the gourd 3 and reach the twig Erlenmeyer flask 4. The glass fiber filled tube 3 is a conventional auxiliary device for this type of equipment. When benzene is used as the solvent in the adsorption tube 2.2', it is true that most of the BaP in the cigarette combustion smoke is adsorbed in the adsorption tube 2 and does not enter the adsorption tube 2'. This was revealed through separate research by Sakio Ikeda, the inventor of the application. However, in the BaP extraction apparatus of the present invention, an adsorption tube 2' is placed side by side as a supplementary means in case of an emergency.

Tubes 2, 2 collected using the device shown in Figure 1
The liquid in ' is compressed and developed in two stages using a thin layer two-layer chromatograph, the position of BaP is confirmed using a fluorescent lamp, it is scraped off, and identification and quantification are performed using an ultraviolet spectrophotometer.

Example 1. Comparative Examples 1 and 2 Wood dissolving pulp with DP650 and α-cellulose content of 93.5% was heated at 54°C at 17°C in a tank equipped with a stirring device.
．． With a 5% aqueous solution of caustic soda, 4 ts@=4=kIF was obtained. After crushing this alkali cellulose with an Eirich type crusher, it was placed in a 40% oxygen atmosphere at 42°C for 9 hours.
After exposing for 5 hours and making it weakly acidic with excess 20% sulfuric acid,
It was washed with running water for 30 minutes to make it completely neutral, and dried according to a conventional method to obtain a white, substantially powdery cellulose raw material with DP93.

Add this cellulose raw material to water containing 10% alcohol *-
The mixture was made into a paste-like liquid, poured onto a glass plate, and dried and solidified at room temperature to obtain a sheet with a thickness of 021117 m. This sheet was cut into strips of 1 width to obtain ribbon-like strips, which were designated as HV Example 1.

Comparative Example 1 used the powdered cellulose raw material before making the sheetra, and Comparative Example 2 used filter paper for chemical experiments (N112 manufactured by Toyo Genshi Co., Ltd.) cut into thin pieces with scissors. The cellulose raw material of Comparative Example 2 had a DP of 100.

Said Example 1. 11 samples each of three types of comparative examples 1 and 2
The samples were packed in a paper tube made of branded pieces and attached to the above-mentioned combustion smoke benzo(a)pyrene measuring device, and each sample was measured five times.

[Commercially available paper-wrapped chopsticks] A book is filled with about 1 ton of various raw materials, but in reality, the cellulose content in the contents of 1F is usually 45 to 50%. Approximately 50% of the remainder is additives. Therefore, the prototype paper-wrapped bamboo trowel made of cellulose raw material in this example was filled with cellulose alone to 1f, or the same O as commercially available cigarettes. When the hardness was different, the material was filled to the same hardness. Yes
This is because if the cigarette is filled above the legs, the suction resistance of the cigarette will be large and smoke will not pass through.

Also, in the combustion experiment mentioned above, T! - It is done under certain conditions. However, when observing combustion phenomena, there are considerable variations from test to test, and as a result, variations are also seen in the BaP values obtained.

The average values of the measurement results are shown in Table 1. In Table 1, the degree of combustibility of tobacco is shown by the number of times the lighter is lit to continuously burn bamboo shoots.

Table 1 As shown in Table 1, in Example 1, in which a cellulose raw material with an average degree of polymerization of 93 was used in the form of a ribbon, the extracted amount of BaP was reduced to the minimum value of 1±lnf/f, and the combustion In the test, the concentration decreases as well. Said 1
The amount of Ba and P generated at ±1nf/f is about 0 compared to the amount of BaP generated in cigarettes made using natural tobacco leaves. If manufactured, the generated BaP image will be 115
Expected to get o things. If the cellulose raw material of Example 1 is mixed with natural bamboo leaves to make bamboo cigarettes, it is expected that cigarettes with a reduced amount of BaP generated will be obtained depending on the mixing ratio. The mixing ratio of the cellulose raw material may be appropriately selected in consideration of performance such as bamboo shoot flavor.

It should be noted that the thickness of the sheet and the thickness of the ribbon-like strips are not quite the same as those in Example 1, but are within a range approximately equivalent to the thickness ζ of natural tobacco leaves in cigarettes. It may be selected freely within a range that allows sufficient mixing with natural tobacco leaves.

Incidentally, commercially available cigarettes use anti-fade agents, but no anti-fade agents were used in the Examples of the present invention. Therefore, if the prototype cigarette in the above-mentioned example is mixed with an anti-fading agent in an amount used in commercially available bamboo shoots, a trial cigarette that will fade to some extent can be obtained, for example, Example 1.
It is hoped that this will completely eliminate the problem of prototype cigarettes made using cellulose raw materials.

The average degree of polymerization (door) used in this specification is JI
It is a value obtained by converting the Oken formula relative viscosity ηr@j according to SP8101 into a multi-average degree of polymerization (1 block) using the following formula.

C... Cellulose g / I Km = 5 By making cigarettes using cellulose raw materials alone or by mixing them with natural tobacco leaves, it is possible to reduce the melting density of the tobacco, make the suction resistance comparable to that of commercially available cigarettes, and produce extremely low amounts of BaP.・

[Brief explanation of the drawing]

FIG. 1 is a front view schematically showing an apparatus for extracting benzo(a)V-lene from cigarette combustion smoke. 1... Cigarette, 2, 2'-... Adsorption tube, 4... Trimmed Erlenmeyer flask. Patent applicant: Asahi Kasei Kogyo Co., Ltd. Patent agent: Akira Aoki, patent attorney Kazuyuki Nishidate, patent attorney Akira Yamaguchi, patent attorney Masaya Nishiyama

Claims (1)

[Scope of Claims] 1. A ribbon-shaped cellulose raw material for tobacco admixture, which is used alone in tobacco or mixed with natural tobacco leaf raw material, and the cellulose raw material is made from cellulose with an average degree of polymerization of 200 or less. A ribbon-shaped cellulose raw material for tobacco mixture, characterized in that it is cut into a ribbon shape and formed into a ribbon-like size corresponding to the size of the natural tobacco leaf inside. 2.-Processing cellulose with an alkaline aqueous solution to obtain alkali cellulose, completely adjusting the decomposition of the alkali cellulose and neutralizing it to obtain cellulose with an average degree of polymerization of 200 or less; A ribbon-shaped cellulose raw material for tobacco mixing, comprising the steps of: forming a sheet using a stitch; and cutting the sheet into a size approximately corresponding to the size of natural tobacco leaves in bamboo shoots Production method.