JPH03161582A - Partially decoloring method in dyed fiber - Google Patents

Abstract

PURPOSE:To obtain soft dyed material having excellent partially decoloring pattern without deterioration of initial dyed material by bringing fiber dyed material into contact with lump of drug having bleaching-acceleration effect in rotating stirring vessel and stirring in rotating stirring vessel containing bleaching agent solution. CONSTITUTION:Fiber dyed material, especially jeans is brought into contact with solid lump of drug having bleaching-acceleration effect, e.g. 8-24C dialkyl- dimethylammonium halide or alkyldimethylbenzylammonium halide in a rotating stirring vessel and subjected to decoloring treatment in a rotating stirring vessel containing hypochlorite solution to afford the aimed soft dyed material having enriched partially decoloring pattern with contrast of decolored part and non- decolored part, especially in a case of jeans, further having excellent undulated color contrast.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application) The present invention is a method for partially decolorizing dyed fibers. Partially bleached jeans can be produced using the method. Furthermore, in addition to jeans, it can also be used to make antique-style items by partially bleaching dyed woven fabrics, knitted fabrics, or non-woven fabrics.

(Prior Art) Conventional methods for partial bleaching of jeans include the STONE-W7/NEW method, the CHEMICAL WO/N-YU method, and the BLEACH method. In the Stone Uoso/Yu method, twill blue jeans and pumice are stirred and brought into contact with each other in a washer or other device to partially decolorize the jeans using frictional force. The colored product has a strong color contrast between bleached and non-bleached areas. Next, in the chemical method, the twill weave blue jeans are brought into contact with pumice impregnated with a bleaching agent such as sodium hypochlorite in a device such as a Wonoh/Yar to partially decolorize the jeans. The structure of partial bleaching occurs when the pumice stone containing the bleach solution comes into contact with the twill blue jeans fabric. Part of the night transitions from pumice to jeans;
The purpose is to decompose and decolorize the dye in this area. Note that the bleach solution does not migrate to areas that do not come into contact with pumice, so the dye in these areas does not decompose or decolorize, leaving the blue color as it is. In the bleached product, the color contrast between the bleached portion and the non-bleached portion is even stronger. Next, the bleaching method is to uniformly mix the jeans with a bleaching agent such as sodium hypochlorite in a device such as a washer. This is a method of decolorizing L. Therefore, any part will be uniformly bleached, and the color contrast between the bleached part and the non-bleached part will almost disappear. There is also the stone bleaching method, in which pumice is added to the inside of the leather during bleaching, but the result is the same finish as the bleaching method.

42 Stone Uono/Yu Note or Chemical Uono, 7
Jeans that have been partially bleached using the Yu method have been on the market in large numbers for the past k years, and people are starting to get tired of the ecstatic color pattern with the strong color contrast between the bleached and non-bleached areas. On the other hand, with bleach injection, all parts are uniformly bleached, and there is almost no color contrast between the bleached and non-bleached areas, and there is little whitishness.

Furthermore, among the conventional methods described above, the method using stone, that is, pumice, causes severe damage to the G/S fabric due to the friction caused by the hard stone. Furthermore, there are other problems such as difficulty in disposing of used pumice stones.

(Problems to be Solved by the Invention) In the present invention, the bleached portion and the non-bleached portion are
A new color with a color contrast between the 1st method and the bleach method, that is, the difference in color between the bleached and non-bleached areas is quite clear, but the color boundary does not change drastically, but gradually changes naturally. We offer a partially bleached product that has a pattern and is interesting. Furthermore, it solves the problem of damage to fabrics caused by the use of pumice stone and the problem of disposal of pumice stone.

(Means for Solving the Problems) The present invention involves subjecting a dyed fiber product to a stirring contact treatment with a solid chemical lump having a bleaching accelerating effect in a rotating stirring vessel of 2 g, and then bringing the dyed fiber product into contact with a bleach solution in a rotating stirring vessel. This is a method for partially decolorizing dyed fibers, which is characterized by stirring the dyed material in a vacuum chamber. The method of the present invention will be explained in detail below.

The fiber dyed products applied to the present invention are dyed products made of woven fabrics, knitted fabrics, non-woven fabrics, etc., but especially jeans are dyed fabrics.
You can effectively bring out the interesting colors and patterns in Assignment 1.

In other words, jeans are twill-woven using large-count east-colored yarn for the warp and non-dyed yarn for the weft, but the fabric has a difference in height between the peaks and valleys of the weave, and only the warp is dyed. ,
As mentioned above, when a hard stone-like solid chemical substance that has a bleaching accelerating effect (hereinafter referred to as bulk bleaching accelerator) is stirred and brought into contact with it in a rotating stirring vessel, it comes into contact with the mountainous parts in particular, and these parts are mainly decolored. This creates a so-called sesame pattern with the colors of mountains and valleys.

The dyed fibers applied to the present invention are pretreated if necessary. For jeans, remove wrinkles and remove starch. The method is Panno to remove wrinkles! 82 There is a so-called soaking method in which a large amount of water is poured into the product and passed through, and there is also a method for removing desizing by pouring warm water into a rotating stirring container such as a washer drum, washing, dehydrating afterwards, and drying or non-drying. .

In general, a bleaching accelerator is a chemical that has little bleaching ability per se, but significantly increases its bleaching ability and effectiveness when treated with a subsequent bleaching agent. A feature of the bleaching accelerator used in the present invention is that it is used as a bleaching accelerator in the form of a chemical lump of hard stone-like cedar. Therefore, the mass must be hard enough to maintain its shape during rotational stirring in a container.

As the bulk bleaching accelerator in the present invention, various chemicals having the accelerating effect can be used, but in particular, dialkyl-dimethylbenzylammonium halide, alkyl-dimethylbenzylammonium halide, alkyl trimethyl halide, or alkylamine organic acid salts are used. Among them, one type of solid substance or a mixture of two or more types of solid substances are effective. Each alkyl group here has 8 to 24 carbon atoms. Next, the structural formulas of each of the above chemicals are shown.

7-alkyl dimethyl ammonium halide (here R
is a C8-24 alkyl group, X is F, CI, Br, I
) Alkyl dimethylbenzylammoumhalai 1' (where R is an alkyl group having 8 to 24 carbon atoms, X is F, CI
, Br, l) alkyl trimethyl halide R N (C H , LX (herein, R is an alkyl group of Cfi8 to 24, X is F,
CL Br. ．． [ ) Alkylamine organic acid salt R N I+ , .CI, COOH RNH-C. H. NH, CH, COOH (here R is C
Alkyl group of number 8 to 24;=) The shape of the mass of the bleaching accelerator used in the present invention may be spherical, cubic, rectangular parallelepiped, cylindrical, conical, or any other shape. Further, the size of the lump is, for example, in the case of a spherical shape, a diameter of 0.3 to IOCII11, preferably a diameter of 3 to Icta. If the chemical lumps are as small as 0.3 or less, or if they are soft enough to be crushed during rotational stirring in the container, uniform contact treatment will be required, and the color loss during decolorization will be small and the product will not be interesting. Furthermore, when the diameter of the lump is 10 cm or more, the contact spots become more intense and the spotted pattern becomes noticeable in a wide field of view.

The bleach accelerator treatment of the present invention is usually characterized in that it is treated only with bulk bleach accelerator. Even if there are limbs in the rotating agitation container, only a small amount of liquid brought in when the dyed fibers were pre-impregnated, or a small amount of liquid that does not soak all the dyed fibers when newly added. I need to stop it.

This is because when the chemical treatment is performed in a large amount of liquid, it is no different from ordinary liquid uniform treatment, and the decolorization contrast is low and the color becomes uninteresting.

The method of treating the bulk bleach accelerator uses a rotating stirring vessel such as a Wonong Yard drum, and applies the bulk bleach accelerator in an amount of 10 to 500%, preferably 500%, based on the weight of the dyed fiber to be treated.
0 to 200% and treated at room temperature to 50°C for 10 to 50 minutes. At this time, normally no liquid is placed in the container, but if the liquid is placed within the above-mentioned range, a milder color bleaching contrast will be obtained.

Next, as the bleaching agent used in the present invention, it is possible to use a bleaching agent that produces a bleaching effect in combination with the above-mentioned chemicals that have a bleaching accelerating effect. Acid salts, bleaching agents, etc.), cyanuric chloride bleaches, etc. are effective.

Oxidizing bleaches such as permanganate, hydrogen peroxide, sodium peroxide, sodium perborate, and barium peroxide can also be used in the pond. There are also reducing bleaches such as Hydrosulfide.

The bleaching agent treatment method uses a rotating stirring vessel such as a washer drum, and the above bleaching agent is added in an amount of 5 to 25%, preferably 10 to 20%, based on the weight M of the dyed fiber to be treated.
Immerse in 1000-2000% water and treat at room/EA~50°C for 10-20 minutes.

(Function) The present invention is characterized in that a dyed fiber product and a bulk bleaching accelerator are subjected to a stirring contact treatment in a rotating stirring vessel, and the dredged dyed fiber product is subjected to a rotating stirring treatment with a bleach solution in a rotating stirring vessel. This is a method for partially bleaching dyed textiles. Its action is to bring the dyed fibers and the bulk bleaching accelerator into contact with each other with stirring in a state with no or little liquid, so that the bulk bleaching accelerator is spread irregularly and non-uniformly on the surface of the dyed fibers in a narrow field of view. However, in a wide field of view, the contact is made with a kind of uniformity, and the bleach accelerator adheres to the contact surface of the dyed fiber in the form of a powder or thin foil in the contact pattern described above. In addition, in the case of jeans, there is a difference in height between the crests and troughs of the weave, so the bleaching accelerator mainly adheres to the crests. In the next bleaching step, each part of the dyed fiber is brought into uniform contact with the bleach solution, but the parts to which the bleach accelerator has been applied are bleached white, and the parts to which the bleach accelerator has not been applied remain blue. As a result, the contact pattern appears as a colored pattern. The colored pattern is an antique pattern in which the pattern formed by the bleached and non-bleached parts is irregular and non-uniform in a narrow field of view, but has a kind of uniformity in a wide field of view, and the pattern formed by the bleached and non-bleached parts is Although the difference between the colors is quite clear, the boundaries between the colors do not change drastically, but instead gradually change naturally, creating a new color pattern. Furthermore, in the case of jeans, in addition to the color pattern +A ti, a so-called sesame pattern with color contrast of peaks and valleys also appears.

Furthermore, in the present invention, the bulk bleaching accelerator is worn out during stirring and contact and adheres to the surface of jeans in the form of powder or thin foil, so there is less damage to the jeans fabric compared to the method using pumice.

(Examples) The embodiments of the present invention will be described below using specific examples, but the present invention is not limited to these examples.

Example 1 Before starting the main processing, a hot water washing step was first performed as a pretreatment.

In other words, put 800 kg of 60℃ hot water in the washer, &
Adult jeans pants made by II 40kg (50kg)
This material was charged and rotated for 15 minutes to remove the glue and remove the frost. Next, drain the liquid and add fresh <40℃ warm water.
A so-called warm water wash was performed by rotating Irk for a minute. Next, the jeans pants were centrifugally dehydrated and then dried in a dryer.

Next, main processing was carried out. That is, 50 kg of a bulk bleaching accelerator with a diameter of 3 to 7 cm consisting of a molten mixture of dilauryl dimethyl ammonium chloride: lauryl dimethyl benzyl ammonium chloride = 70:30 was placed in a container, and the jeans pants after drying. 40 kg was charged and rotated and stirred for 35 minutes at room temperature in the absence of liquid, and the bulk bleaching accelerator was brought into contact with the surface of the jeans pants irregularly, but with a small amount of light in a wide range of vision. . As a result of this treatment, the bleach accelerator adhered to the contact surface of the jeans pants in the form of powder or i4 foil.

Next, we moved on to the bleaching (decolorization) process. i.e. 5 for Wonho/Ya
600 kg of 0°C warm water and 5 kg of a sodium hypochlorite stock solution containing 12% or more of available chlorine were added to prepare a bleach solution, and 40 kg of the treated jeans pants were added to this solution and rotated for 10 minutes to remove color. All parts of each pair of jeans pants were soaked uniformly in the bleach solution, but only the surface of the parts to which the bleach accelerator had been applied in the previous main process was significantly bleached, becoming almost white, and the adhesion force was 4. In the areas and areas with less adhesion, the degree of decolorization was small and the blue color remained.

After the bleaching process, the hind legs were removed, and a sodium thiosulfate aqueous solution was added thereto, and the animals were rotated and stirred at 50°C for 5 minutes, followed by a cumulative desalting process.
Further, the product was soaped, washed with hot water, subjected to a softening process, and dried to obtain a final product.

111 The jeans pants product has a pattern of bleached parts and non-colored parts that is irregular and non-uniform in a narrow field of view, but has a kind of uniformity in a wide field of view.
Although the difference in color between the bleached part and the non-bleached part is quite clear, the color boundary does not change drastically but gradually and naturally.It is a new color pattern pattern t-1, and it has a mountain, It is a partially bleached product with an interesting sesame pattern with valley color conolast. In addition, since pumice is not used in this embodiment, the deterioration of the fabric that occurs in conventional chemical wafers using pumice does not occur.

Comparative example l: 50 kg of pumice with a diameter of 3 to 10 cm was treated with 0 available chlorine.
．． It was immersed in a 2% sodium hypochlorite aqueous solution for 3 minutes and drained to give a liquid content of 40%. The pumice stone and 40 kg of blue jeans pants that had been softened with stone wash were placed in a Wonoshiar, and subjected to rotary rolling treatment for 30 minutes for partial decolorization. The jeans pants were then washed with water and treated with chlorine to produce a product.

The product thus obtained has a strong color contrast between the bleached and non-bleached areas, and the border between them is bright + lQ, making the pattern look unnatural and boring.

Comparative Example 2 600 kg of water, 0.5 kg of sodium bicarbonate as a bleaching agent for limbs, and 5 kg of sodium hypochlorite stock solution as a bleaching agent were placed in a washer, and 40 kg of pretreated jeans pants as in Example 1 were charged. is. After rotary stirring at 50°C for 20 minutes, the same post-treatment as in Example 1 such as dechlorination was carried out to obtain a decolorized product.

The resulting product was bleached by stirring evenly with a large amount of sodium hypochlorite, so all parts were uniformly bleached, and there was almost no color contrast between the bleached and non-bleached areas, and the color pattern was sharp. There was no white taste. .

Practical row 2 Jeans pants that had undergone the same pretreatment as the actual spinner I were washed with 'IQ' water and then without being dried, they were directly mixed with dilauryl dimethyl ammonium chloride: lauryl dimethyl benzyl ammonium chloride = Ki of 95:5 as a fused bulk bleaching accelerator. (
The final product was obtained using the same main treatment as in Example 1, followed by the same bleaching treatment as in Example 1, and subsequent treatments in the same manner as in Example 1.

(The pattern formed by the bleached and non-bleached parts of the jeans pants product was irregular and non-uniform in a narrow field of view, but in a wide field of view, it was more uniform in OIJ! than in Example 1. Although the difference in color between the bleached area and the non-bleached area is slightly smaller than in Example 1, it is much clearer than in Comparative Example 1, and the color boundary does not change drastically but gradually becomes whiter and darker. It is a partially bleached product with an interesting new color pattern that changes over time.

Practical Example 3 The same pre-treated and dried jeans pants as in Example 1 were treated with a mixed melted mass bleaching accelerator of tetradenylamine acetate/bephenyltrimethylammonium chloride-60:40 (lump diameter 4-7 cm). The same main treatment as in Example 1 was carried out, followed by the same bleaching treatment as in Example 1, and subsequent treatments were carried out in the same manner to obtain a final product.

The resulting jeans pants product had an irregular and non-uniform pattern of bleached and non-bleached areas, similar to Example 1, but had a kind of uniform pattern when viewed from a wide perspective.
In addition, while the difference in color between the bleached area and the non-bleached area is quite clear, the color boundary does not change drastically, but has a new color pattern that gradually changes naturally, with peaks and valleys. It is a partially bleached product that has a white taste with a sesame pattern with a color contrast.

(Effect of the invention) The partially bleached product obtained has a pattern formed by bleached areas and non-bleached areas that is irregular and non-uniform in a narrow field of view, but has a kind of uniformity in a wide field of view. Although the difference in color between the part and the non-bleached part is quite clear, the color boundary does not change drastically but is a new color pattern that gradually changes naturally. Particularly in the case of jeans, sesame patterns with peaks and valleys with a color contrast of 1 appear in the color pattern.

Historically, since the present invention uses a bleaching accelerator, the amount of bleaching agent used or the period of bleaching treatment can be reduced compared to simple bleaching treatment, making it easier to clean, and deterioration of dyed products due to bleaching agents does not occur. do not have. It also has a better texture and flexibility than a simple bleach treatment or chemical treatment.

Furthermore, in the case where pumice is not used in the pretreatment of the present invention, there is no damage caused by the eaves stone treatment, and no pumice waste is generated.

that's all

Claims (3)

[Claims] (1) A dyed fiber product is brought into contact with a solid chemical mass having a bleaching accelerating effect in a rotating stirring container, and then the dyed fiber material is subjected to a stirring treatment with a bleach solution in a rotating stirring container. A method for partially bleaching dyed textiles. (2) A solid chemical mass having a bleaching accelerating effect is one of dialkyl dimethyl ammonium halide, alkyl dimethyl benzyl ammonium halide, alkyl trimethyl halide, or alkyl amine organic acid salt having an alkyl group of 8 to 24 carbon atoms. The method for partially decolorizing a dyed fiber material according to claim 1, which is a solid material or a mixed solid material of two or more types. (3) The method for partially decolorizing a dyed fiber according to claim 1, wherein the dyed fiber is jeans.