JPH06299473A - Method for worn-out processing of cellulosic fibrous structure - Google Patents

Abstract

PURPOSE:To obtain a method for dyeing a cellulosic fibrous structure in which natural worn-out feeling can simply and uniformly be imparted to the cellulosic fibrous structure and various hues can be obtained. CONSTITUTION:The method for dyeing or printing a cellulosic fibrous structure with a threne dye is to apply a treating liquid containing the threne dye to the structure, then wash the fibrous structure, further apply a treating liquid containing an alkali and a reducing agent, reduce and fix the threne dye thereto. Furthermore, this method for dyeing or printing the cellulosic fibrous structure with the threne dye is to apply a treating liquid containing the threne dye and a paste to the fibrous structure, heat-treat the resultant fibrous structure, wash the heat-treated fibrous structure, then apply the treating liquid containing the alkali and the reducing agent to the fibrous structure, reduce and fix the threne dye thereto.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing and finishing method of a cellulosic fiber structure.

[0002]

2. Description of the Related Art Generally, it is desired that a dyed or printed product has little discoloration after repeated washing, that is, it should be dyed firmly so as not to be washed. However, in the fashion trends of young people these days, the feeling of being washed or worn is preferred, such as blue denim. In particular, casual pants called bleach-out denim are the twill fabric dyed with indigo dye or its sewn product that has been decolorized using a bleaching agent. Further, not only the indigo dye blue, but also color denim of various hues are washed away, that is, products that have a bleach-out feeling are becoming more and more popular.

To meet such demands, conventionally, after dyeing or printing with a reactive dye, exposure to chlorine is performed, or after dyeing or printing with a slene dye, exposure to chlorine is performed, but each has defects. . That is, in the former, the chlorine fastness of the reactive dye is generally poor, so that it is difficult to control the concentration of the dyed cloth or the printing cloth, and in the latter, the chlorine fastness is too good and the bleached-out feeling is hard to appear. In any case, the bleaching process is a batch method such as winth and it takes a long time, and even the dye left unbleached because it is decolorized using a bleaching agent is affected by the bleaching agent, and the fastness is descend. Further, since sodium hypochlorite or the like is used as a bleaching agent, there is a drawback that the workability is poor due to the problem of odor.

Further, in response to the above-mentioned demand, after dyeing or printing with a pigment, a cloth containing a ball is used for kneading. , There was a problem that it was different from the original feeling of washing.

In order to solve these problems, Japanese Patent Laid-Open Publication No.
JP-A-9-163491 discloses a dye, an alkali agent, a sulfinic reducing agent, and an alkaline reducing inorganic which are water-insoluble and are dissolved and dyed on a white cloth or dyed cloth of cellulosic fibers A method of obtaining a dyeing cloth having a feeling of being washed by padding a dye solution containing a metal compound and steaming without drying has been proposed, but it cannot be applied to a printed material, and a slene dye or the like is reduced by a reducing agent. There is a problem that the dye concentration gradually decreases due to decomposition, and tailing occurs.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems in the case of imparting a natural feeling to a worn and washed appearance to a cellulosic fiber structure. is there.

That is, the present invention provides a processing method capable of easily and uniformly imparting a natural worn-out washed-out feeling to a cellulosic fiber structure and enabling various hues. .

[0008]

In order to achieve the above object, the present invention has the following constitution. That is, the first invention is
A method for dyeing or printing a cellulosic fiber structure with a slene dye, which comprises applying a treatment liquid containing a slene dye, followed by washing, and further applying a treatment liquid containing an alkali and a reducing agent for reduction fixation. A gist is a method for washing and washing a cellulosic fiber structure, which is characterized in that the second invention is a method for dyeing or printing a cellulosic fiber structure with a slene dye, which comprises a slene dye and a paste. A treatment liquid containing at least one selected from an agent, a synthetic polymer and a resin is applied, followed by heat treatment and washing, and then a treatment liquid containing an alkali and a reducing agent is further applied to reduce and fix. The summary is a method of washing and washing a cellulose-based fiber structure.

The present invention will be described in detail below.

Examples of the cellulosic fibers used in the present invention include cotton, hemp, rayon and acetate. Such cellulosic fibers may be used alone or mixed with other fibers by blended spinning or interwoven knitting, and in the case of admixture, it is desirable to contain 50% by weight or more of cellulosic fibers. Examples of the fibrous structure include yarns, woven fabrics, knitted fabrics, and non-woven fabrics.

Next, the first method of the present invention will be described.

The slene dyes that can be used in the present invention include
Examples include thioindigo-based, indanthrone-based, bilancerone-based and isodibenzanthrone-based. The amount of such a slene dye to be used may be an appropriate amount depending on the dyeing or printing density.

The treatment liquid contains the above-mentioned slene dye, but does not contain an alkali and a reducing agent. Examples of the method of applying the treatment liquid include a padding method, a spray method, a printing method, and the like. After applying the treatment liquid, the fiber structure is usually dried at 80 ° C. or higher.

Washing is performed after the heat treatment.
Use continuous wins, wins, open soapers, washers, etc. The temperature, time, etc. at the time of cleaning may be appropriately selected according to the washing condition of the product. After washing, the fiber structure is usually dried at 80 ° C. or higher.

The reducing agent used in the present invention is not particularly limited as long as it converts a slene dye into a fiber-affinity leuco compound, and examples thereof include sodium dithionite (sodium hydrosulfite). . Conversion to the leuco compound form is carried out in an alkaline solution. Examples of the alkali include sodium carbonate, sodium bicarbonate, sodium hydroxide, disodium phosphate, trisodium phosphate, borax and the like.

The treatment liquid consisting of such an alkali and a reducing agent includes an electrolyte such as sodium chloride or sodium sulfate, a hydrotrope agent such as urea, a sequestering agent, a leveling agent,
A wetting agent or the like may be added. Examples of the method of applying the treatment liquid include a padding method, a spray method, a textile printing method and the like.

After the treatment liquid is applied, the slene dye is reduced and fixed by a known method. As a method of reducing and fixing, Jigger coloring, steam coloring, Williams unit coloring,
Molton metal coloring method and the like can be mentioned. After reduction and fixation, the product is washed and dried by a known method to obtain a product.

Next, the second method of the present invention will be described. In the second method of the present invention, not only the slene dye but at least one selected from the slene dye, the paste material, the synthetic polymer and the resin.
The difference is that the treatment liquid containing a seed is used and the treatment liquid is applied and then heat treated.
Is the same as the method.

Used in the present invention. Examples of sizing agents that can be used include starches (starch, soluble starch, water-soluble starch derivatives, etc.), water-soluble cellulose derivatives (carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose, etc.), sodium alginate, gum arabic, gums (locust bean gum). , Guar gum, etc.), water-soluble proteins (gelatin, glue, etc.), water-soluble synthetic polymer compounds (sodium polyacrylate, polyvinyl alcohol, polyethylene oxide, polyvinyl pyrrolidone,
Polyacrylamide, polyethyleneimine, quaternized water-soluble cationic polymer, etc.).

Examples of synthetic polymers that can be used in the present invention include acrylic polymers, urethane resins, and polymeric substances containing silicon as a main component.

Resins usable in the present invention include melamine formalin resin, triazone formaldehyde resin,
Urea formaldehyde resin, ethylene urea formaldehyde resin, N-methylol resin, N-methylol ether resin, dimethylol dihydroxy ethylene urea,
Examples include tetramethylol and acetylenediurea.

The amount of at least one selected from the sizing agent, the synthetic polymer and the resin may be appropriately selected according to the washability of the product, but usually it is a dry weight of 0. It is attached at a rate of about 1 to 10% by weight.

Examples of the heat treatment method include a dry heat treatment at 120 to 170 ° C., a steaming method with saturated steam at 120 ° C. or lower, and a steaming method with heated steam at 190 ° C. or lower. The treatment temperature, time, etc. may be appropriately selected according to the washing condition of the product.

[0024]

When the treatment liquid containing the slene dye is applied to the cellulosic fiber structure, the slene dye adheres to the cellulosic fiber structure. Next, when this is washed, the slene dye partly comes off, resulting in a wash-out tone. Then, when an alkali and a reducing agent are applied to this to reduce and fix it, the slene dye becomes insoluble and a robust product is obtained.

When a treatment liquid containing a slene dye and at least one selected from a sizing agent, a synthetic polymer and a resin is applied to the cellulosic fiber structure and heat-treated, the slene dye strongly binds to the cellulosic fiber structure. It comes to adhere to things. Next, when this is washed, at least one selected from a sizing agent, a synthetic polymer, and a resin is partially dropped off, and along with this, the slene dye is dropped off, resulting in a wash-out tone. Then, when an alkali and a reducing agent are applied to this to reduce and fix it, the slene dye becomes insoluble and a robust product is obtained.

The present invention will be described in detail below based on examples.

Example 1 Using a 50-count (cotton-count) single yarn as the warp and weft, a cotton flat fabric woven with a warp density of 144 yarns / inch and a weft density of 80 yarns / inch is fried and desizing according to a conventional method. , Scouring and bleaching.

As a slen dye, this plain woven fabric was used as a slen dye, 30 g / l of Mikelen Olive T (manufactured by Mitsui Toatsu Dye Co., Ltd.), 10 g of Nihonren Yellow 4GL (manufactured by Nippon Kayaku Co.)
1, Mikeslen Brown BR (manufactured by Mitsui Toatsu Dyestuffs Co., Ltd.)
A treatment liquid of 20 g / l was padded at a pickup rate of 70% and then dried at a temperature of 120 ° C. for 2 minutes.

Then, using a loco type jet dyeing machine, washing was carried out at a bath ratio of 1:30 at a temperature of 70 ° C. for 30 minutes, and after dehydration,
It was dried at a temperature of 120 ° C. for 2 minutes. Next, sodium hydroxide 20g / l, sodium hydrosulfite 20
A treatment liquid containing g / l and 20 g / l of sodium chloride was padded at a pickup rate of 70%, steamed at 250 ° C. for 9 seconds, washed with hot water, and dried to obtain the product of Example 1.

Example 2 In Example 1, the NK binder P370 (manufactured by Meisei Chemical Co., Ltd.) 5 was used as an acrylic resin in addition to the slene dye.
0 g / l, 2 g / l of Succinol CSK (manufactured by Nichiyaku Kagaku Co., Ltd.) as a penetrant, and 3 at 150 ° C. after application of the treatment liquid
The same process as in Example 1 was carried out except that the heat treatment was carried out for 1 minute to obtain a product of Example 2.

Example 3 The product of Example 3 was obtained by applying the same type of reactive dye to the product of Example 2 by a known method, fixing and soaping the product.

Example 4 28.6 count (cotton count) single yarn consisting of 70% by weight of rayon and 30% by weight of hemp as warp, 70% by weight of rayon and 3 of hemp
30% (cotton count) single yarn consisting of 0% by weight is used as the weft, and rayon / linen blended plain weave woven with a warp density of 70 yarns / inch and a weft density of 55 yarns / inch is fried and desizing according to a conventional method. , Bleached.

Mikeslen Blue ACE Super Fine (Mitsui Toatsu Dyes Co., Ltd.)
30 g / l, Mikeslen Black SR (manufactured by Mitsui Toatsu Dyes Co., Ltd.) 9 g / l, Mikeslen Brilliant Violet RR (manufactured by Mitsui Toatsu Dyes Co., Ltd.) 3 g / l, sorbitose C-5 as modified starch (Made by AVEBE) 200
g / l, Indalca PA3 as locust bean gum
A printing paste composed of OA (manufactured by Cesalpinia) of 400 g / l was printed in a polka dot pattern using a screen print, dried at a temperature of 80 ° C. for 5 minutes, and dried at a temperature of 150 ° C. for 3 minutes.

Thereafter, the temperature is set to 80 ° C. by using a continuous winch.
After washing for 30 minutes at a temperature of 120 ° C. for 2 minutes, a treatment solution consisting of 20 g / l of sodium hydroxide, 20 g / l of sodium hydrosulfite and 20 g / l of sodium chloride was padded at a pickup rate of 70%, Two
Steaming was performed at 50 ° C. for 9 seconds, followed by washing with hot water and drying to obtain the product of Example 4.

The products obtained in Examples 1 to 4 exhibited a wash-out tone.

The dyeing fastness of the product obtained in Example 4 is shown in Table 1.

[0037]

[Table 1]

As is clear from Table 1, the product obtained in Example 4 has excellent dyeing fastness.

[0039]

As described above, according to the method of the present invention, it is not difficult to control the dyeing density as in the conventional method, the process time is short, there is no odor problem, and the wash feeling is excellent and reproducible. It is possible to achieve certain processing continuously, and its industrial utility value is great. In addition, the resulting product can be used in all hues, has an unprecedented sense of washability, and is extremely useful as a casual application.

Claims (2)

[Claims] 1. A method for dyeing or printing a cellulosic fiber structure with a slene dye, which comprises applying a treatment liquid containing a slene dye, followed by washing, and further applying a treatment liquid containing an alkali and a reducing agent. And a reduction-fixing method, which is a method for washing and cleaning a cellulosic fiber structure. 2. A method of dyeing or printing a cellulosic fiber structure with a slene dye, which comprises applying a treatment liquid containing at least one selected from a slene dye, a sizing agent, a synthetic polymer and a resin, A method for washing and cleaning a cellulosic fiber structure, which comprises heat-treating and washing, and further applying a treatment liquid containing an alkali and a reducing agent to reduce and fix the treatment.