JPH0742660B2 - Post-treatment method for dyeing textile materials containing cellulose fibers - Google Patents

Description

The present invention relates to a post-treatment method for improving the dyeing fastness of a dyeing of a fiber material containing a cellulosic fiber dyed with a direct dye and / or a reactive dye.

Dyeing products dyed with a direct dye generally have small dyeing fastness such as wash fastness, water fastness, sweat fastness, etc.
It cannot be put to practical use as it is.

Further, the dyed object dyed with the reactive dye is excellent in dyeing fastness as compared with the dyeing object using the direct dye, but still, in washing fastness, water fastness, sweat fastness, etc., Insufficiency, and since the covalent bond between the fiber and the reactive dye is hydrolyzed in the air to be gradually broken, the dyeing fastness of the dyed product decreases with time. Therefore, even in the case of an article to be dyed with a reactive dye, it may not be put to practical use as it is. For this reason, conventionally, for the purpose of improving the dyeing fastness of the dyed product, the dyed product is treated with a dilute aqueous solution of a special cationic polymer after dyeing.

As such a cationic polymer, a condensate of dicyandiamide and formalin or a condensate of polyamine such as ethylenediamine and diethylenetriamine and dicyandiamide is mainly used. However, this type of cationic polymer contains a high concentration of primary, secondary, and tertiary amines in addition to quaternary ammonium in the molecule. There is a drawback in that discoloration becomes remarkable and at the same time, deterioration of light fastness cannot be avoided. Further, in the former case, that is, in the case of a condensate of dicyandiamide and formalin, residual formalin becomes a problem, which is not preferable from the viewpoint of environmental hygiene.

The object of the present invention is to improve the wash resistance, water resistance, sweat resistance, light resistance and abrasion resistance of the dyed product, and even after the treatment, there is no chlorine water resistance, sweat resistance, sunlight composite, fluorescent whitening light resistance. It is to provide a new post-treatment method that does not reduce the degree of deterioration.

In particular, a dyed product dyed with a reactive dye is generally superior in dyeing fastness to a dyed product using a direct dye, but nevertheless, the washfastness, waterfastness, sweatfastness, etc. Is insufficient, and the covalent bond between the fiber and the reactive dye is hydrolyzed in the air and gradually cut, so that it is unavoidable that the dyeing fastness of the dyeing product decreases with time.

For this reason, in the case of dyeing with the above reactive dye,
It is common practice to subsequently carry out post-treatments with various fixing agents.

The present inventor has conducted various studies on the sticking agent used in the above-mentioned post-treatment, and as a result, the salt of chitosan obtained from crustaceans is particularly wash-fast and fast as compared with the conventionally known sticking agent of this type. It has been found that it has the effect of remarkably improving the water resistance, the water fastness and the sweat fastness, and is extremely effective as this kind of fixing agent.

However, in the dyeing industry in recent years, there has been an increasing demand for improvement in the quality of dyed products, and when dyed with the above reactive dye, the dyed product also has the following various fastnesses in addition to the conventional dyeing fastness. The characteristics to do are being demanded.

The resistance to chlorine water fastness does not decrease In recent years, the concentration of active chlorine in city tap water has increased considerably, and the dyeing product repeatedly washed with the tap water is required to have fastness to chlorine water. The same can be said when washing with a detergent containing a bleaching agent.

Permanent sweat / sunlight fastness has not deteriorated It has recently become a problem that dyes containing sweat easily discolor and fade due to sunlight.

Fluorescent whitening Fastness to light does not decrease In order to improve the whiteness of the printed article in the white field, a fluorescent whitening agent is generally used, but the reactive dye on the printed article treated with the fluorescent whitening agent is Very easily discolored by sunlight.

None of the known post-treatment fixing agents considers the above-mentioned requirements (1) to (3) and, of course, does not have the properties that meet these requirements.

Rather, the publicly known adhesives have the above-mentioned properties due to their use.
Inevitably tended to reduce the fastness of.

Therefore, the present inventor continued to solve the deterioration of the fastness particularly in the above-mentioned, and as a result of earnest research, as a result, the acid salt of the chitosan polymer contained in the crustaceans such as crabs and reeds is
The present invention has been completed by recognizing that it has a very serious influence on the fastness of the. That is, the present invention provides a post-treatment method for a textile material dyeing product containing a cellulosic fiber dyed with a direct dye and / or a reactive dye,
The present invention provides a post-treatment method for a dyed textile material containing cellulosic fibers, which improves dyeing fastness, which comprises treating an article to be dyed with an aqueous solution of an inorganic acid salt or an organic acid salt of chitosan.

In the present invention, the method of treating the material to be dyed with an aqueous solution of an inorganic acid salt or an organic acid salt of chitosan is not particularly limited, and a conventionally known method can be appropriately used. For example, the mineral or organic acid salt of chitosan is added to the fiber at 0.2
~ 4.0% by weight of the dyed material to be treated in a dissolved aqueous solution for a certain period of time, followed by washing with water and drying, or 0.2 to 4.0% by weight of the inorganic or organic acid salt of chitosan, if necessary fiber The dyed product to be treated with the solution containing the processing resin and / or the fluorescent dye may be pad-treated.

In the case of the dipping treatment, the bath ratio (object to be dyed: water) is usually 1:10 to 20, the treatment temperature is usually room temperature to 80 ° C., and the treatment time is usually 5 to 20 minutes. Further, the aqueous solution of inorganic acid salt or organic acid salt of chitosan used in the present invention is an aqueous solution of chitosan obtained by deacetylating chitin and made into a salt type with an inorganic acid salt or an organic acid.

Chitosan has a molecular weight of several thousand or more to several hundred thousand or less, and is obtained by high-temperature treatment of chitin, which is often present in the shells of crustaceans, shell components of insects, cell walls of fungi, etc., with a concentrated alkaline solution. .

The inorganic acid used to form the salt of chitosan is
For example, hydrochloric acid and the like, and the organic acid is, for example,
Formic acid, acetic acid, etc.

The aqueous solution of chitosan salt is suitably an aqueous solution having the chitosan salt concentration of 2 to 50 wt% by adding the inorganic or organic acid to the chitosan. If necessary, they may be used by being mixed with an aqueous solution of lower alcohols.

Next, the present invention will be specifically described with reference to examples.

Example An aqueous solution consisting of 0.3% by weight of glacial acetic acid and 0.5% by weight of chitosan was prepared, and then the dyed product shown below was treated,
The dyeing fastness was measured according to the following test method. The results are shown in Tables 1 to 5.

1-Preparation of dyed product A cotton knit is dyed with a reactive dye and a direct dye according to a conventional method, and then with a 2 g / 1 aqueous solution of Trypol SR [Daiichi Kogyo Seiyaku Co., Ltd.] at 90 ° C. After washing for 10 minutes,
It was washed with water and dried.

Reactive Dye Remazol Brilliant Red BB (CI Reactive Red21) 3% owf Cibacron Brilliant Red 4G-E (CI Reactive Red120) 1% owf Remazol Brilliant Bull-R (CI Reactive Blue19) 4% owf Diamirror Turkis Blue B (CI Reactive Blue) 3% owf Remazol Black B (CI Reactive Black5) 5% owf Direct dye Kayaras Subra Red 6BL Sumilite Red F3B Kayaras Supra Turquoise Blue GL 1-fastness enhancer treatment The comparative product was treated at a bath ratio of 1:30 at about 60 ° C. for 20 minutes, washed with water, and then dried.

1-Fastness test method (a) Dyeing fastness test for washing JIS L-0844 A-3 method (reactive dye) JIS L-1045 A-2 method (direct dye) (b) Dyeing fastness test for sweat JIS L-0848 Method A alkaline (c) Dyeing fastness test after aging The test cloth is steamed with an HP steamer at 115 ° C. for 60 minutes, and then subjected to JIS L-0846 Method A dyeing fastness test with water.

(D) Chlorine resistance fastness test A bath ratio of 1: 2 for a liquid containing 20 ppm of effective chlorine (using sodium hypochlorite)
Immerse the test cloth at 00 at room temperature for 2 hours.

(E) Sunlight fastness test The test cloth is exposed for 20 hours at 63 ° C with a fade-o-meter.

JIS L0842-1971 1-Judgment method For the dyeing fastness, the contamination degree of the attached white cloth (cotton and silk) was evaluated with a gray scale for contamination. In the chlorine fastness test and the sunlight fastness test, the degree of discoloration was evaluated by a gray scale for discoloration.

(Note) As a comparative product, the following two products, which are well-known wet fastness enhancers, were tested.

Comparative product: 0.5% aqueous solution of a fastness enhancer containing a cationic polymer as the main component Comparative product: 0.5% aqueous solution of a fastness enhancer containing a polyamine-based cationic resin as a test sample: Chitosan with a molecular weight of about 60,000 Shin Nippon Kagaku Co., Ltd.
Manufactured by Eisai Co., Ltd. Specimen: Chitosan with a molecular weight of about 10,000
Use]

Claims (1)

[Claims] 1. A method for post-treatment of a dyed textile material containing a cellulosic fiber dyed with a direct dye and / or a reactive dye, wherein the dyed material is treated with an aqueous solution of an inorganic acid salt or an organic acid salt of chitosan. A post-treatment method for a dyed textile material containing a cellulosic fiber, which is characterized in that the dyeing fastness is improved.