JPH0351356A - Dyeing of nylon-containing fabric - Google Patents

Abstract

PURPOSE:To obtain the subject dyed fabric varied in pattern having a feeling of gradation by arranging a nylon-containing fabric to which preliminarily knitted knots are given on a liquid stream-type dyeing machine, raising the liquid temperature, subsequently putting dyes therein, dyeing the fabric and then loosening the knots. CONSTITUTION:A nylon-containing fabric having knots given by previous knitting is arranged on a liquid stream-type dyeing machine and dyes are put therein after raising the liquid temperature to that approaching the dyeing temperature. Dyeing is then carried out and the knots are subsequently loosen, thus obtaining a pattern having a feeling of gradation.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for obtaining a blurred pattern in dyeing a nylon-containing fabric.

[Prior Art] Conventionally, as a method for obtaining a nylon-containing fabric having a pattern, there are methods for obtaining it in the form of a patterned fabric using a jacquard loom or the like;
Methods such as print dyeing have been used.

[Problems to be Solved by the Invention] It is difficult to obtain a pattern that is not uniform and has a blurred feel using a method of obtaining a pattern in the form of a patterned fabric or a method using print dyeing.

An object of the present invention is to provide a method for dyeing nylon-containing fibers that provides a dyed product with a sense of blur and a richly varied pattern.

[Means for Solving the Problems] In dyeing nylon-containing fabric, the present inventor dyes the fabric, which has been knitted and knotted before dyeing, using a jet dyeing machine, so that only the outer portions of the knots are dyed. They discovered that after dyeing and unraveling the fabric, it becomes a blurred pattern that corresponds to the shape of the knots, and the present invention was completed.

That is, in the present invention, a fabric that has been knitted and knotted in advance is placed in a jet dyeing machine, the temperature of the solution is raised to near the dyeing temperature, dye is added, dyeing is performed, and the knots are then untied. This method of dyeing nylon-containing fabric is characterized by obtaining a pattern with a blurred feel.

The important requirements of the present invention are that the fabric is knitted and knotted before dyeing, that a jet dyeing machine is used, and that the dye is added after the liquid temperature has been raised to near the dyeing temperature. As a result, only the outer part of the joint is dyed, and the difference between the dyed part and the undyed part is not clear and is continuous, so that a pattern with a blurred feel can be obtained.

The shape of the nodes and how to make them are arbitrary and determined depending on the desired pattern. For example, something knitted in a knitted pattern,
Examples include, but are not limited to, those knitted in a chain shape. By varying the shape and size of the knots in different parts of the fabric, it is possible to obtain a pattern that is not uniform and has a wide variety of variations.

In order to dye only the outer part of the joint, it is preferable to finish the dyeing without allowing the dye to penetrate into the joint. For this purpose, in the present invention, dye is used in an amount that is completely adsorbed onto the fabric without saturation, and dyeing is carried out for a short time by reducing the bath ratio. In addition, in conventional normal dyeing, the solution temperature is raised after adding the dye at room temperature in order to obtain even dyed products, but in the present invention, the solution temperature is raised to near the dyeing temperature and then the dye is added. and dyeing is carried out at a liquid temperature of 85°C or higher, preferably 90 to 98°C. It is preferable to add the entire amount of dye at once. By dyeing in such a short time at a small bath ratio, the outside of the knitted knots of the fabric is rapidly dyed, while the inside remains undyed.

In order to prevent unevenness caused by short-time dyeing at a small bath ratio as described above, a jet dyeing machine is used in the present invention. This jet dyeing machine itself is known. In a liquid jet dyeing machine, a rope-shaped fabric is circulated in a dye vat by the flow pressure of a dye liquor, and dyeing is performed. For example, the Ga5tOn jet dyeing machine performs dip dyeing by ejecting a heated dye solution from a Venturi jet using a circulating pump, and using the flow pressure to circulate the fabric together with the dye solution at a cloth speed of about 100 Tn/yrn. be. In this method, the dye solution comes into contact with the entire fabric more quickly than in the method using a general wince dyeing machine, so it is suitable for the method of the present invention, which involves introducing dye at high temperature and dyeing rapidly. Beautiful dyed products can be obtained even under suitable dyeing conditions.

Although there are no particular limitations on the dye and dyeing aid used in the present invention, it is preferable to use acidic dyes as the dye. The type of dyeing aid, the temperature of the dye solution, the bath ratio, the dyeing time, etc. are determined depending on the desired pattern and degree of blurring. Acids such as formic acid,
Alternatively, it is preferable to carry out the dyeing in the presence of ammonium sulfate or the like without using a slow dyeing agent or a leveling dye.

To give an example of the dyeing method, a knitted and knotted fabric is set in a jet dyeing machine, and then acetic acid is added to adjust the pH of the dye solution to 3-3.
Set it to 6. After allowing the liquid to flow at room temperature for 10 minutes to evenly spread the acid over the fabric, the liquid temperature is raised (it is not necessary to raise the temperature slowly). When the liquid temperature reaches 90 to 98°C, the temperature increase is stopped and the entire amount of dye is added. 90
After immersion dyeing at ~98°C for 30 minutes, the dye liquor is discharged, washed with water at room temperature, the fabric is unraveled, dried, and finished.

The above dyeing process may be repeated multiple times. It is also possible to use the dyeing process of the present invention in combination with a conventional dyeing method. By performing such dyeing operations multiple times, it is possible to obtain a dyed product having a more complex color pattern.

The nylon-containing fabric that is the object of the present invention is a fiber structure containing nylon as a fiber material, and includes all nylon-containing fabrics. There is no particular restriction on its form, and it may be woven, knitted, nonwoven, or the like. The dyeing method of the present invention can be applied to various known nylon-containing fiber structures, such as those containing nylon such as nylon 4, nylon 6, nylon 7, nylon 11, nylon 12, nylon 66, and nylon 6.10; In addition, cotton, linen, silk, wool, rayon, polyester, acrylic fiber, carbon fiber, etc.
Effective for materials containing various fibers. It is preferable that the fabric to be dyed is subjected to scouring, setting, etc. by a conventional method.

The present invention will be further explained below with reference to Examples.

[Example] Example 1 A soarite taffeta fabric (117 x 46 cm, density: warp 123 threads/inch, weft 96 threads/inch) consisting of 70d/18f nylon irregularly shaped yarn as the warp and 70d/18f nylon irregularly shaped yarn as the weft was prepared. .

First, staining was performed according to conventional methods. That is, after setting the fabric (without knitting) in a jet dyeing machine, a leveling agent, a dye (Acid Blue R), and ammonium sulfate were sequentially added at 10 minute intervals at 30°C. Table 1 shows the amounts of dye liquor, leveling agent, etc. used. After 10 minutes, the liquid temperature was raised to nearly 100°C over 50 minutes, and dyeing was continued for 30 minutes while maintaining this temperature. Next, the dye liquor was cooled, and after 10 minutes when the temperature of the solution reached 60°C, the dye liquor was discharged, washed with water at 30 °C, and then scuttled and dried. This conventional dyeing operation yielded a dyed product that was uniformly dyed in pale blue.

Table 1 Usage level leveling agent (Neogen 5-20> 0.6%ow
f Leveling agent (Ceropol DR80) 0.6%o
wf dye (acid blue R) 0.08%owf
Ammonium sulfate 0.59% Next, this dyed product was made into a chain knit and dyed according to the present invention. That is, Shun knitted the above-mentioned dyed fabric into a chain with stiff knots, set it in a liquid jet dyeing machine, first poured acetic acid into a bath at 30°C, and after 10 minutes had passed, the temperature of the liquid was increased at 3°C/m. Raise to 90℃
And so. Next, add the entire amount of dye at once and leave it for 30 minutes at 90°C.
Dyeing was carried out at °C. The composition of the dye liquor at this time is shown in Table 2.

Immediately after the dyeing was completed, the dye solution was drained, the fabric was washed with water at 30'C, the chain knitting was loosened, and the fabric was dried and finished with a water repellent finish.

Table 2 Usage amount Acetic acid 3d/1 Dye 0.8%o
wf (Lana Pearl Navy Blue R) As described above, by applying the dyeing method according to the present invention to a fabric uniformly dyed in pale blue, the parts other than the knots are dyed navy blue, while the inner parts are dyed pale blue. The remaining dyeing left a dyed product with a complex pattern of pale blue and navy blue with a blurred feel.

[Effects of the Invention] As described above, by the dyeing method of the present invention, it is possible to obtain a beautiful dyed product that has a pattern with a blurred feel and is free from uneven dyeing.

Claims (1)

[Claims] 1. When dyeing nylon-containing fabrics, place the fabric that has been knitted and knotted in advance in a liquid jet dyeing machine, raise the liquid temperature to near the dyeing temperature, then add the dye and dye. A dyeing method characterized by obtaining a pattern with a blurred feel by unraveling the knots.