JPH0416179A - Filter for cigarette - Google Patents

Abstract

PURPOSE:To enable selective adsorption and removal of nicotine by adding oleic amide. CONSTITUTION:A filter material. such as a polypropylene filter is formed into a dual structure, etc., to obtain a filter unit. The resultant filter unit is then mixed with powdery oleic amide, etc. in an amount of 10-50wt.% (weight ratio of oleic amide to filter material) per one piece of filter unit, thus producing the objective filter for cigarette.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tobacco smoke filter,
More specifically, the present invention relates to a tobacco smoke filter characterized by containing oleic acid amide as a selective remover of nicotine components in tobacco smoke.

[Prior Art] Recent trends in cigarette consumption indicate that products with a light taste, low amounts of nicotine and tar, and a mild feel are preferred. In order to meet such consumer demands, various improvements have been made to cellulose acetate filters and paper filters that are currently widely used. A simple example is one that attempts to increase the filtration rate of nicotine tar by making the length of the filter longer than conventional products. Furthermore, in the case of cellulose acetate filters, measures have been taken to increase the filtration rate of nicotine and tar by making the fibers finer in denier and by developing threads with various irregular cross-sections.

[Problems to be solved by the invention] As the debate on smoking and health issues increases, it is expected that the aforementioned trend toward milder smoking will continue, but uniformly filtering nicotine tar as in the past would result in poor smoke quality. There is a problem that the smoke volume cannot be satisfied. In order to achieve a satisfactory smoking taste and smoke volume, it is necessary to control the ratio of the amount of nicotine to the amount of tar in the smoke (hereinafter referred to as N/T) to a desired value. N/T in smoke can be adjusted by changing the composition of tobacco leaves or using tobacco substitutes. However, these methods have problems.

That is, there are restrictions on the cost of new leaf sets, the availability of leaf labor, etc. Furthermore, to date, there are no tobacco substitutes that are acceptable in terms of taste and are not yet at the stage of practical use.

In order to overcome these problems, research is being conducted on filter additives that change the N/T in smoke, that is, filter additives that selectively adsorb and remove nicotine or tar in smoke. There is still nothing that has been put into practical use.

[Means for Solving the Problems] In view of the above circumstances, the present inventors have conducted extensive studies and research to find a substance that selectively adsorbs nicotine or tar in smoke. They discovered that amide has an extremely high ability to selectively adsorb nicotine in cigarette smoke, and completed a cigarette smoke filter with oleic acid amide added that has the ability to selectively adsorb nicotine.

That is, the present invention provides a tobacco smoke filter that is characterized by containing oleic acid amide.

The oleic acid amide used in the present invention is widely used as a lubricant for polyethylene, polypropylene, etc., and may be of the same quality as these.

Oleic acid amide can be added to tobacco smoke filters either in powder form or by impregnating filter tow or filter paper with a solution of oleic acid amide dissolved in an organic solvent such as methanol or ethanol. Alternatively, it may be added by spraying.

It is generally preferable to manufacture the filter structure in the form of a dual structure or a triple structure in order to prevent oleic acid amide from flowing into the oral cavity during tobacco smoking. When used in a dual structure, a part of the filter is sprinkled with oleic acid amide powder or added with an organic solvent solution of oleic acid amide by impregnation or spraying, and a part that does not contain oleic acid amide is used.

When using a triple structure, place a portion of the filter between the filters, or insert the oleic acid amide powder directly between the filters.
Alternatively, a filter may be coated with oleic acid amide powder or a solution of oleic acid amide in an organic solvent may be added by spraying, and the filter may be sandwiched between portions that do not contain oleic acid amide.

Examples of filter materials to which oleic acid amide is added include cellulose acetate filters, rayon filters, polypropylene filters, and paper filters, and the effect is exhibited no matter which material is used.

The amount of oleic acid amide added varies depending on the tobacco leaf structure and the filter material, but is preferably 10 to 50% by weight (ratio of the weight of oleic acid amide to the weight of the filter material) per tobacco smoke filter. If the amount of oleic acid amide added is less than 10% by weight, the nicotine removal effect will be too small, while if it exceeds 50% by weight, a paraffin odor will be produced, causing problems in terms of flavor.

[Example] Hereinafter, the present invention will be explained in detail with reference to Examples, but the present invention is not limited to these Examples in any way.

In addition, the ventilation resistance measurement, the measurement of nicotine in the smoking test, and the measurement of tar filtration rate described in the following Examples and Comparative Examples were performed as follows.

(1) Airflow resistance is the pressure drop in water column when the flow rate of air passing through the filter plug or filter chip to be measured is 17.5 ml/sec.

The smoking test was conducted using a constant flow type automatic smoking machine with a flow rate of 17.5.
Automatic smoking was performed under conditions of ml/sec, smoking time 2 seconds, smoking cycle 60 seconds, and smoking length 50 seconds, and the mainstream smoke was collected with a Cambridge filter, and the filtration rates of nicotine and tar were measured.

The nicotine and tar filtration rate is determined by the amount of nicotine and tar attached to the filter after smoking (T and T, respectively) and the amount of nicotine and tar attached to the Cambridge filter for collecting smoke components of the smoker (C and T, respectively). CT) was measured, and the filtration rate of each filter body was determined using the formula below.

Nicotine filtration rate (wt%) Tar filtration rate (wt%) As a filter chip, 6 wt% triacetin is added to crimped cellulose diacetate tow with single fiber fineness of 3.3 denier, Y-shaped cross section, and total fineness of 48,000 denier. attached, circumference 24.4mm5 length 84n+m
A cigarette filter rod with a % ventilation resistance of 300 + nm H2O was rolled up, cut into 17 mm filter chips, 0.1 g of ethanol was added with a syringe, and then vacuum dried at room temperature (20-25°C) to make commercially available cigarettes. A part of the filter was cut out from "Cherry" (manufactured by Japan Tobacco Inc.) and connected to a cigarette frame to prepare Comparative Example 1 sample.

Connect the same filter tips used for the above comparative sample to a length of 12ml and 5 sections, and apply an oleic acid amide ethanol solution with a concentration of 15% by weight to the 12 mm filter tip. The amount added was 15% by weight based on the weight of the tow in the chip using a syringe, followed by vacuum drying at room temperature (20 to 25°C), and this was connected to a 5 mm filter chip to prepare.

Next, this filter chip was connected to a "Cherry" cigarette frame in the same manner as in Comparative Example 1 to obtain an Example 1 sample.

These samples were smoked using an automatic smoking machine and the filtration rates of nicotine, tar, and water were measured. Table 1 summarizes the results.

Table 1 Table 2 In exactly the same manner as in Example 1, only the amount of oleic acid amide solution added was changed, and the amount of oleic acid amide added to the filter chip was 25 and 35% relative to the tow weight in the chip.
A filter chip was prepared in such a manner as to correspond to the weight percentage, and was connected to a cigarette frame to prepare samples of Examples 2 and 3.

After smoking with an automatic smoking machine in the same manner as in Example 1, the filtration rates of nicotine, tar, and water were measured. The results are summarized in Table 2.

A filter rod of length 84 m+e, identical to that used in Example 1, was cut into 5 mm filter tips.

Arrange the two pieces with a gap of 5 mm, and place the JIS
A triple filter was prepared by adding 0.05 g of granular oleic acid amide having a particle size of 24 to 42 meshes separated using a certified standard sieve, and filtered in the same manner as in Example 1.
It was connected to the cigarette frame of "Cherry". As a comparative example, the filter loft with a length of 84 mm used in Examples 1 to 4 was
A sample was used, which was prepared by connecting a cigarette frame to a filter chip cut into seven filter chips having the same ventilation resistance as the triple filter of Example 4. These samples were subjected to a smoking test in the same manner as in Example 1, and nicotine, tar,
The filtration rate of water was measured. The results are shown in Table 3.

Table 3 [Effects of the Invention] According to the cigarette smoke filter containing oleic acid amide of the present invention, nicotine in cigarette smoke can be selectively adsorbed and removed.

Claims (1)

[Claims] 1. A filter for tobacco smoke, characterized in that it contains oleic acid amide. 2. The tobacco smoke filter according to claim 1, wherein the amount of oleic acid amide added is 10 to 50% by weight per filter.