JPH04352885A - Shaded dyeing of cellulose-based textile goods - Google Patents

Abstract

PURPOSE:To enable the subject shaded dyeing capable of giving a visual appearance of shabby-tone by impregnating a garment composed of cellulose-based fiber fabric with an N-methylolaminoplast resin solution, drying it, applying heat treatment thereto and then dyeing it. CONSTITUTION:A garment made of fabric composed of a cellulose-based fiber such as cotton, linen or rayon or blended yarn between the cellulose-based fiber and a protein fiber such as a synthetic fiber, wool or silk or union cloth thereof is impregnated with an aqueous solution of N-methylolaminoplast resin and subsequently dried by using a tumbler. Heat treatment is then carried out so that the above-mentioned N-methylolaminoplast resin may be reacted with hydroxyl groups of the cellulose fiber constituting the above-mentioned fabric and dyeing is subsequently carried out.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for speckled dyeing sewn products made of cellulose fiber woven or knitted fabrics.

0002

BACKGROUND OF THE INVENTION The dyeing of cellulose fibers is generally divided into yarn dyeing, piece dyeing (reverse dyeing), and product dyeing, and mottled dyeing is carried out in each of these processes. Among these methods, when dyeing the finished product in spots, generally several to dozens of sewn products are packed in a bag, etc., and a paddle dyeing machine or rotary dyeing machine is used to dye the product using a highly direct dye. There is a rapid dyeing method, or a method of using an Obermeyer dyeing machine, which packs the sewn product unevenly and dyes it while the dye solution passes through it.

However, these methods have poor reproducibility and require a great deal of skill and experience. In addition, each sheet may be manually dyed using a spray dyeing method, a resist dyeing method, etc., but the productivity is low and the manufacturing cost is extremely high.

0004

[Problems to be Solved by the Invention] The present invention was made in view of the current situation, and it is an object of the present invention to easily impart a natural mottled dyeing effect rich in variation to sewn products made of cellulose fiber fabric. The purpose of this is to provide a reliable and stable supply of funds.

[0005]

Means for Solving the Problems In order to achieve the above object, the present invention has the following configuration. That is,
When dyeing a sewn product made of cellulose fiber fabric, the present invention is characterized in that the sewn product is impregnated in advance with an aqueous solution of N-methylolaminoplast resin, dried, heat treated, and then dyed. This article focuses on methods for dyeing products in spots.

The present invention will be explained in detail below. The cellulose fiber fabric applied to the present invention refers to woven or knitted fabrics made of cotton, hemp, rayon, etc., and is a composite material such as blending, interweaving, or interweaving of these fibers with synthetic fibers or protein fibers such as wool or silk. This also includes materials. In this case, it is desirable for the cellulose fiber to be contained in an amount of 30% or more in terms of the uneven dyeing effect. Sewing using these cellulose fiber fabrics (any sewn product such as pants, skirts, shirts, blouses, blouses, sweaters, etc.)
However, when making a product, fibers other than cellulose-based fibers may be used as parts, but the method of the present invention can be applied even in such cases, and the cellulose-based fiber fabric part may be used for the intended purpose. It is possible to impart mottled dyeing.

[0007] Such a cellulose fiber fabric is subjected to pre-treatments such as scouring, bleaching, and mercerization according to the usual methods as necessary, and then sewn into a desired shape, and this sewn product is used as a dyed material in the present invention. use

[0008] In the method of the present invention, first, N is applied to the above-mentioned sewn product.
- Perform the pre-processing process of impregnating with an aqueous solution of methylolaminoplast resin, drying, and heat treating. N- used here
Methylolaminoplast resins specifically include glyoxal-based, ethylene-urea-based, uron-based, urea-formalin-based, triazine-based, propylene-urea-based, melamine-based,
Among organic compounds such as acetals, it refers to those containing an N-methylol group as a reactive group with cellulose. These are generally available in the form of an aqueous solution as wrinkle-proofing and shrink-proofing agents for cellulose fibers. The amount of these N-methylolaminoplast resins to be used is about 0.05 to 5.0% by weight, preferably 0.2 to 1.0% by weight, based on the weight of the fibers.

In the present invention, it is also possible to use an epoxy resin or a bis-sulfonate resin instead of the N-methylolaminoplast resin.

A catalyst is used in combination with the N-methylolaminoplast resin for the purpose of promoting the reaction with cellulose. As this catalyst, an acid or a type of latent acid that generates an acid when heated can be used. Specifically, metals such as magnesium chloride, zinc chloride, magnesium nitrate, zinc nitrate, aluminum chloride, magnesium sulfate, and tin chloride can be used. Examples include salt compounds, organic acids such as oxalic acid, citric acid, maleic acid, fumaric acid, trichloroacetic acid, and tartaric acid, mineral acids such as sulfuric acid and phosphoric acid, and organic amine salts, either alone or in combination. Use as. These acidic catalysts are used in a solid content of about 5 to 40% by weight based on the N-methylolaminoplast resin. The amount of catalyst used varies greatly depending on the type of catalyst, since the catalytic effect varies greatly depending on the type of catalyst.

In the method of the present invention, a sewn product to be dyed is immersed in a mixed aqueous solution of the N-methylolaminoplast resin and a catalyst, and then dehydrated to adjust the water content. The amount of the aqueous solution applied is about 40 to 150% by weight based on the weight of the fibers. The easiest way to adjust the moisture content is to use a centrifugal dehydrator, and the moisture content tends to be relatively stable.

[0012] After adjusting the moisture content, drying is carried out, and a tumble type dryer is preferably used as the dryer to be used at this time, since it can produce the most stable unevenness. The drying temperature is
The drying temperature is about 60 to 100°C, but when the drying temperature is lower, the mottling effect tends to be milder when the drying temperature is lower, and the mottling effect tends to be more severe as the drying temperature is higher. If the drying temperature exceeds 100℃,
This is not preferable since gelation of the N-methylolaminoplast resin may occur during drying. Furthermore, when a large amount of a strong acid such as a mineral acid is used as a catalyst, gelation may occur even at a drying temperature of 60° C. or lower, so care must be taken.

In the method of the present invention, after applying the N-methylolaminoplast resin, drying and heat treatment are performed in order to react with the hydroxyl groups in the cellulose molecules. As for reaction conditions, treatment at 100 to 160°C for 5 to 30 minutes is sufficient. When a strong catalyst is used, the reaction can be carried out at 100° C. for about 20 minutes. Therefore, by selecting a catalyst, it is possible to carry out drying and reaction continuously in a tumble dryer, or it is also possible to carry out the reaction in a short time at high temperature using a tunnel finisher, etc. It is.

[0014] Regarding the sewn products reacted with N-methylolaminoplast resin by the above method, in the method of the present invention,
Next, the product is dyed, but prior to dyeing, it is necessary to wash the product with water or hot water to sufficiently remove unreacted N-methylolaminoplast resin and catalyst. As a method for dyeing the product, a general dyeing method used for ordinary cellulose fibers can be used. Direct dyes, reactive dyes, threne dyes, etc. can be used as dyes, and general paddle-type dyeing machines, rotary-type dyeing machines, and Obermeyer-type dyeing machines can be used as dyeing machines.

[0015] In this way, a mottled dyed product can be obtained by the method of the present invention. This mottled dyed product also has a washed-out appearance. The present invention has the above configuration.

[0016]

[Effect] When N-methylolaminoplast resin is dried and heat-treated using an acidic catalyst, it easily crosslinks with the hydroxyl groups in the amorphous region of the cellulose molecule, and as a result, crosslinks are introduced. The part is inhibited from swelling in water, impeding the penetration of dye molecules, greatly reducing dyeability, and thus acting as a dye resist.

However, the purpose of using N-methylolaminoplast resin is not simply to utilize its resisting ability. This N-methylolaminoplast resin is applied to fibers in an aqueous solution state, and when drying,
It has the property of rapid and large migration. In other words, it moves together with water to areas that dry quickly, and crosslinking is strongly promoted there. In particular, since sewn products are sewn together in a complicated manner, the drying rate varies greatly depending on the part, and the difference in the amount of N-methylolaminoplast resin deposited varies greatly. Additionally, during the dehydration process, the moisture content of the overlapped parts is high, and this factor also makes the distribution of the N-methylolaminoplast resin on the fibers extremely complex and variable at the end of drying. It becomes something.

[0018] The reason why this N-methylolaminoplast resin has a high migration property is due to its molecular structure, but in general, it is used to prevent wrinkles in cotton fabrics.
It is difficult to obtain a uniform crosslinking distribution during shrink-proofing,
It is well known that this is one of the factors that causes a large decrease in strength. In other words, even if a tenter dryer or the like is used with the fabric in a flat state, the migration is so great that even a slight difference in temperature or air volume will result in non-uniform distribution.

As described above, the present invention focuses on the high migration and dye resistance of N-methylolaminoplast resin and the local differences in drying speed caused by the complicated shape of sewn products, It is applied to the law of

[0020]

[Example] Next, an example of the method of the present invention will be explained in more detail with reference to an example.

Example 1 Twill fabric Katsuragi using 10th cotton thread (warp density: 80 threads/
After burning, desizing, scouring, bleaching, and mercerizing the fabric using the usual methods, the fabric was sewn into casual pants. The sewn product was subjected to the following pretreatment prior to product dyeing. Using a rotary dyeing machine, immerse in the treatment bath of the following recipe 1 for 20 minutes at room temperature, then centrifugally dehydrate it with a centrifugal dehydrator to reduce the moisture content to 8.
It was adjusted to 0%.

[Formulation 1] Sumitekus Resin NS-11
6g/liter (Sumitomo Chemical (
Co., Ltd., glyoxal resin) Sumitex Accelerator X-110 4g/liter
(Manufactured by Sumitomo Chemical Co., Ltd., composite metal salt catalyst) Citric acid (1st grade reagent)
1g/liter

Next, after drying at 70°C for 30 minutes using a tumble dryer, heat treatment was performed at 120°C for 20 minutes. After performing the above pretreatment, using a rotary dyeing machine,
Dyeing with a reactive dye was carried out at 60° C. for 60 minutes at a bath ratio of 1:30 according to the following recipe 2.

[Formulation 2] Sumitex Supra Navy Blue
GTL 5% owf (manufactured by Sumitomo Chemical Co., Ltd., reactive dye) anhydrous sodium sulfate
5% owf soda ash
2% o
wf

[0025] The casual pants dyed in this way have dark and light shades of navy blue appearing in various places.
It had a mottled dyeing that gave it a very natural and casual feel.

Example 2 After scouring and bleaching a knitted fabric (pique texture) using cotton thread count 20 using a conventional method, this knitted fabric was sewn into a polo shirt. The sewn product was subjected to the following pretreatment prior to product dyeing. Using a paddle-type dyeing machine, it was immersed in a treatment bath of the following formulation 3 for 15 minutes at room temperature, and then centrifugally dehydrated using a centrifugal dehydrator to adjust the moisture content to 100%.

[Formulation 3] Bethcamine E 8
g/liter (Dainippon Ink & Chemicals Co., Ltd., ethylene urea resin) Catalyst GT-3 5g/liter (Dainippon Ink & Chemicals Co., Ltd., composite metal salt catalyst) Tartaric acid
0.25g/liter

Next, using a tumble dryer, 1
Heat treatment was performed at 00°C for 80 minutes. After the above-mentioned pretreatment, dyeing with a direct dye was carried out at 95° C. for 60 minutes at a bath ratio of 1:50 according to the following recipe 4 using a paddle-type dyeing machine.

[Formulation 4] Kayarus Supura Brown GTL
5% OWF (manufactured by Nippon Kayaku Co., Ltd., direct dye) anhydrous sodium sulfate
10% off

[0030] Thereafter, a fixing treatment was carried out for 15 minutes at 40°C using Senka Fix NFC (Nippon Senka Co., Ltd., Fix Agent) 5% owf according to the usual method.

[0031] The knit polo shirt dyed in this manner had very natural shades of brown appearing in various places, and was given a highly sensitive and varied mottled dyeing.

[0032]

[Effects of the Invention] According to the method of the present invention, sewn products can be dyed with a wide variety of spots. This mottled dyed product also has a washed-out appearance.

Claims (1)

[Claims] 1. A cellulose-based product characterized in that when dyeing a sewn product made of a cellulose-based fiber fabric, the product is impregnated with an aqueous solution of N-methylolaminoplast resin, dried and heat-treated, and then dyed. How to dye textile products in spots.