JPS5934352B2 - tobacco filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cigarette filter that can very efficiently remove harmful substances such as nicotine and tar contained in tobacco smoke without impairing the original taste of tobacco.

Cigarette smoke contains alkaloids such as nicotine, phenolic compounds, and large amounts of black tar-like substances containing these substances, and it is well known that these substances have harmful effects in the body after inhalation. This is where I am.

In recent years, people have become fond of light-scented cigarettes, and cigarettes with filters have been preferred for the purpose of removing harmful substances from the smoke. Acetate, viscose rayon, paper, etc. are used as filter materials, and recently, wool and cigarettes have been used. Synthetic fibers are also being considered.

However, nicotine, a harmful substance in cigarette smoke,
Acetate is considered to be the best in terms of tar removal effect and flavor, and is currently used in large amounts.

However, even with this acetate filter, the removal rate of nicotine is about 25-30%, the removal rate of tar is about 30-40%, and it is said that 3- and 4-benzpyrene, which is known as a carcinogen, is not adsorbed.

In order to improve the nicotine and tar removal rate, which cannot be said to be sufficient, there are methods of increasing the surface area of the fibers, changing the cross-sectional structure, and adding an adsorbent.

The surface area can be changed by changing the denier of the fibers, and the surface area can be increased by making the fibers finer in denier.

In this case, the nicotine and tar removal rate is improved, but the ventilation resistance is greatly increased and it becomes difficult to breathe, which is not desirable.

On the other hand, filters with a larger surface area, lower airflow resistance, improved nicotine and tar removal rate, and are easier to absorb have recently become available on the market, but these filters have low production rates due to slow manufacturing speed, and their fibrous tow is compared to conventional products. It has the disadvantage of being used in large quantities.

The inventors of the present invention have conducted intensive studies with the aim of removing harmful substances such as nicotine and tar from cigarette smoke and improving the flavor of the smoke rather than reducing it. It was found that the intended purpose could be achieved.

That is, the gist of the present invention resides in a cigarette filter characterized in that the fibrous cigarette filter contains uncrimped yarn in a proportion of 5 to 60 wt%.

The point of view of the present invention is that by inserting uncrimped yarn into a fibrous filter, a highly filled filter chip can be obtained compared to conventional products.

In other words, since the porosity between single fibers of uncrimped fibers is smaller than that of crimped fibers, it is necessary to increase the amount of fiber filling per filter chip in order to obtain airflow resistance equivalent to that of conventional products. .

This is based on the knowledge that the total surface area of the fibers within the filter chip increases, which improves the nicotine and cool removal rate.

The uncrimped fibers used in the present invention are those that are not mechanically crimped or have at most two to three crimps per inch even if mechanically crimped.

The cigarette filter of the present invention contains 5 to 60 wt% of the uncrimped system based on the total denier 35,000 to 90,000 denier tow obtained by mechanical crimping.
If it is less than 60 wt%, there is almost no difference from conventional products, and if it exceeds 60 wt%, the nicotine and cool removal rate decreases, which is not preferable as a cigarette filter.

The above wt% is expressed as a percentage of the weight of the uncrimped fibers to the total weight of the crimped fibers and the uncrimped fibers.

The cigarette filter of the present invention can be applied to filters based on acetate, paper (or viscose rayon, or polypropylene), but especially when applied to filters made from acetate fibers, it has an appropriate moisturizing power, so that it can be used for harmonious aroma fermentation. It can give a pleasant aromatic taste.

Next, the present invention will be explained by examples.

The measurement conditions of the example are as follows.

Ventilation resistance Flow rate 17.5ml/sec Smoking conditions Smoke suction device Constant flow type Smoke suction time 2 seconds/times Smoke interval 58 seconds Smoke flow rate 17.5ml/sec Number of puffs 7 times/mainstream smoke collection method Cambridge filter CM-11,
3 Number of smokes: 20 Tar analysis method Gravimetric method Nicotine (total alkaloids) analysis method Ultraviolet spectrophotometry Example I Single yarn with Y cross section 4.0 denier, total denier 3000
After fully opening a mechanically crimped acetate fiber tow of 0 to 43,000 denier and spraying 7% triacetin into the tow with the tow sufficiently expanded, the acetate fibers were mechanically crimped at the proportions shown in Table 1. A non-crimped thread was inserted.

Put this through a cigarette plug making machine and get a circumference of 24.7 mm.
It is a filter plug with a length of 102 mm.

Cut the plug into a length of 17 mm and use cellophane tape with a width of 12 mm as a chip to create a suction resistance of 105 ± 5.
The experiment was carried out by attaching the cut end to one end of a cigarette exhibiting mmH2O.

Table 1 shows the results of a comparison between the product of the present invention in which uncrimped threads are inserted and the conventional product without the addition of uncrimped threads. Because the initial components inside are removed, it gives an extremely good smoking feeling.

Claims (1)

[Claims] 1. A cigarette filter comprising 5 to 60 wt% of acetate uncrimped fibers to the fibrous cigarette filter.