JPS6098978A - Production of colored tobacco filter - 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 [Background Art] The present invention relates to a novel method for producing colored cigarette filters.

[Prior art]

Most cigarette filters are white, made with titanium oxide, but some colored ones are also popular.

BACKGROUND ART Tows of cellulose acetate fibers produced by a dope dyeing method in which pigments are incorporated into the fibers have conventionally been used to produce colored cigarette filters.

However, the manufacturing method for colored tow requires a complicated process and requires a large investment in equipment, and in addition, when changing the color, a large amount of waste is generated, making it uneconomical. It is also extremely disadvantageous.

[Purpose of the invention]

An object of the present invention is to color cellulose acetate fibers by a simple method.

[Structure of the invention]

That is, the gist of the present invention is to manufacture a colored cigarette filter by opening a tow made of cellulose acetate fibers, impregnating the tow with a WJ tlj agent in which a colorant is uniformly dispersed, and then forming the tow into a rod shape. There is a particular thing.

ri/(For the production of a co-tailor, fill p-.

In order to express the appropriate hardness in the rad, the tow is opened,
Triacetin is attached as a plasticizer.

The plasticizer dissolves the fiber surface, binds the contact portions of the fibers, and provides the necessary hardness to the filter rond.

According to the present invention, it is possible to produce a colored cigarette filter by making use of the dissolving action of the plasticizer and solidifying (depositing) fine particles of colorant uniformly dispersed in the plasticizer onto cellulose acetate fibers. Become.

In addition to the above-mentioned triacetin, the plasticizers used in the present invention include
Conventionally known polyethylene glycol diacetate, diglopionate, dibutyrate ester, dimethoxyethyl phthalate, triethyl citrate and the like can be mentioned.

Furthermore, the colorant used in the present invention may be any pigment, dye, natural pigment, etc. as long as it is non-toxic. Preferably, Food Red No. 1 Aluminum Lake, Food Red No. 2 (C2) sold as food or cosmetics are used.
oHIIN2 Na1O+oSs), Food Red No. 2 Aluminum Lake, Food Red No. 3 (C,.H6I4 Na
, 05' H20), Food Red No. 3 Aluminum Lake, Food Yellow No. 4 (CI6H1IN4 N11g 0
9 St), Food Yellow No. 4 Aluminum Lake, Food Yellow No. 5 Aluminum Lake, Food Green No. 3 (C37H
gNz Nal olOSs), Food Blue No. 1 (C3
, H, , N, Na20@H3), food blue No. 1 aluminum lake, cosmetic group CB-80, natural pigments β-carotene, indigo, and gardenia green pigment.

The colorant is preferably water-insoluble, considering its solubility in saliva from the lips in contact with the filter.

The dispersion ratio of the plasticizer and the colorant may be any suitable ratio as long as it is uniformly dispersed, and is preferably 0.05 to 10% by weight, more preferably 0.1 to 21% by weight.

Colored filters using plasticizers with uniformly dispersed colorants as described above cannot be decolored by normal smoking methods, but will be slightly decolored if washed and rubbed in a hot water bath. The present inventors have investigated ways to more firmly deposit these fine particles onto cellulose acetate fibers, but by adding cellulose acetate flakes to the plasticizer, it is possible to uniformly disperse the colorant (after dissolving). By using such materials, the ability to prevent these from falling off can be improved.

In this method, since the colorant particles are included in cellulose acetate and a plasticizer, the adhesion of the particles and cellulose acetate to the fibers is strengthened. It is preferable that the amount of cellulose acetate added here is 10 to 61 kg by weight from the viewpoint of viscosity and dissolution spots. In order to make it inconspicuous, it is important that the cellulose acetate fiber tow used be uniformly opened and that the tow width after opening should not vary.

In the present invention, when adding a coloring agent at t6 and actually manufacturing Tanokuko stilter, it is currently t1. It has the advantage of being able to be manufactured with almost no changes to the Tanoguko stilter manufacturing method for cellulose acetate fiber, which is used commercially. In other words, all you have to do is replace the plasticizer with a plasticizer in which a coloring agent is uniformly dispersed or a plasticizer in which cellulose acetate is dissolved.
This is an extremely inexpensive method economically.

The plasticizer in which the coloring agent is dispersed is added in an amount of 2 to 20 ffi, preferably 6 to 10 weight, per cereulose acetate fiber. Appropriate methods of attachment can be used, such as spraying, felt touch, roller touch, etc.

Hereinafter, the present invention will be specifically explained with reference to Examples. Parts represent parts by weight.

Examples 1 to 8 Filament denier 2, 2. A tow of cellulose acetate fiber with a Y-shaped cross section, a total denier of 40,000, and a constriction number of 26 (25 Ryumura 9) was opened, and a plasticizer with the colorant shown in Table 1 uniformly dispersed with a homogenizer was added.
After being sprayed to give an amount of 8M per cellulose acetate fiber, it was sent to a paper winding machine and rolled up with a filter paper at a speed of 400 ml and cut into a length of 120 mm.

The cut surface of each filter was colored according to the combination and amount of colorants added.

Although the filter was rubbed and washed in a hot water bath, there was very little decolorization, demonstrating that the colorant particles were solidly deposited on the cellulose acetate fibers.

Table 1 Examples 9 to 11 Same as Examples 1 to 8, except that a plasticizer in which the colorant shown in Table 2 was uniformly dispersed in triacetin prepared by dissolving cellulose acetate flakes in the plasticizer was sprayed. After that, it is sent to a paper winding device and rolled up with a filter paper 12
It was cut to a length of 0+wu. The cut surface of each filter was colored according to the colorant and amount added.

The filter was rubbed and washed in a hot water bath, and the degree of decolorization was even smaller than that seen in Examples 1 to 8, demonstrating the effect of the addition of cellulose acetate.

Table 2 12 [Effects of the Invention] The colored cigarette filter of the present invention has fine particles of the coloring agent hardened (deposited) on the cellulose acetate fibers by the plasticizer, so that it can be easily removed during the manufacturing process or subsequent steps (during filter handling and smoking). Sometimes it does not fall off easily.

Further, the filter of the present invention is extremely excellent because it does not dissolve into saliva even when it comes into contact with the lips.

Moreover, since the method of the present invention adopts a method of attaching a coloring agent after opening the tow, it has high industrial value.
It is.

Claims (1)

[Claims] 1. Manufacture of a colored cigarette filter characterized by opening a tow made of cellulose acetate fibers, impregnating the tow with a plasticizer in which a colorant is uniformly dispersed, and then forming the tow into a rod shape. Method. 2. The method for producing a colored cigarette filter according to claim 1, wherein the colorant is a pigment, dye, or natural coloring matter. 38. The method for producing a colored cigarette filter according to claim 1, wherein the plasticizer has 10% or less of cellulose acetate dissolved therein.