JPH0359182A - Dyed cloth and dyeing process - Google Patents

Abstract

PURPOSE:To obtain a dyed cloth having extremely clear color on front and reverse surfaces by coating the front and reverse surfaces of a cloth with a dyeing liquid produced by compounding sodium alginate to a dye liquid and forming an undyed layer between the front dyed layer and the reverse dyed layer. CONSTITUTION:A dyeing liquid produced by mixing a dyeing liquid with 0.5-5% of sodium alginate is applied to the front and reverse surfaces of a cloth 1 in such a manner as to keep the sum of the thickness of the front coating layer 2 and that of the reverse coating layer 3 to be smaller than the thickness of the cloth. The color is developed in a state to leave an undyed layer 4. A dyed cloth having extremely clear color on the front and reverse surfaces can be produced by this process because the mixing of the front and reverse dyed layers 2a, 3a is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dyed fabric that is dyed so that the colors on both sides of the fabric do not mix with each other, and a dyeing method therefor.

[Conventional technology]

A conventional technique for dyeing different colors on the entire surface or portions of both the front and back sides of a fabric will be described below.

■ This is a method in which each dye solution is mixed with a sizing agent to increase its viscosity and is applied to both the front and back surfaces to develop color.The viscosity is increased to prevent dyeing from penetrating into the center of the fabric.

■ Each dye solution was mixed with a sizing agent to increase its viscosity and was applied to the entire surface or part of the release paper, then allowed to dry.The coated surface was first placed on the surface of the fabric and heated and pressed to transfer the dye. After that, the release paper is peeled off and removed, and the back side of the fabric is then similarly treated to dye each side separately.

[Problem to be solved by the invention]

However, according to the conventional method (2) above, it is difficult to make the thickness of the dyed layer uniform, and as shown in Fig. 3, the thickness of the co-dyed layer on both the front and back sides of the fabric varies markedly depending on the location. There is a problem that the color is pale and the fastness of the dyeing is weak in the thin areas.

In addition, in thick areas, there is a problem that the front and back dyed layers come into contact, causing a change in hue. This is because the dye-containing liquid oozes out from the coating layer and spreads irregularly inside the fabric.

Next, according to method (2), the thickness of the dyed layer can be made uniform, but because it is extremely thin, when the fabric is rubbed, threads on the surface of the fabric move, causing discoloration.

(Means for Solving the Problems) The present invention mixes 0.5 to 5% sodium alginate to the dye solution to increase the viscosity, and the sum of the thickness of the front side coating layer and the back side coating layer of the fabric is It is characterized by the fact that it is coated to a thickness of less than or equal to 100 mL to develop color, and a non-dyed layer is formed inside.

[For production]

According to the above composition, 0.5 to 5% sodium alginate
The reason for this limitation is that when the concentration of the sodium alginate aqueous solution is 0.5 to 5%, it does not exude water to the surrounding area, but rather forms a coating layer of a predetermined thickness in order to absorb moisture from the surrounding area. However, if it is less than 0.5% or more than 5%, water will seep out to the surrounding area, resulting in unevenness in the coating layer.

Furthermore, if the sodium alginate content is less than 0.5%, the viscosity of the aqueous solution will be too low, and if it is more than 5%, it will be too high and it will be difficult to uniformly apply the solution.

In other words, by mixing 0.5 to 5% sodium alginate with the dye solution, the dye solution can be uniformly applied to the fabric surface to any desired thickness, and the dye solution will not ooze out of the coated layer. It is possible to prevent the dye solution from overlapping on both the front and back surfaces with almost no dyeing during the subsequent coloring, washing, and drying steps.

〔Example〕

The present invention will be explained in detail below.

FIRST EXAMPLE FIG. 1 (1) is a cross-sectional view, and 1 indicates a fabric, which is a plain woven fabric made of 100% processed polyester yarn and has a bleached thickness of about 250 μm.

Dye mixture 2 on the front side of this fabric 1, dye mixture 3 on the back side
was applied using a gravure roll under the following conditions.

The composition of the dye mixture 2 is as follows: Dye (Resolin Blue FBL): 2%
Sodium alginate: 2% tartaric acid
:0.3% water
: 95.7% The composition of the above dye mixture 3 is: Dye (Miketone Polyred FB): I% Sodium alginate: 2% Tartaric acid
=0.3% water
: Thickness of surface side coating layer 2 of 96.7% fabric 1 : 100 μm Thickness of back side coating layer 3 of fabric 1 :
After applying the dye under conditions of 80 μm or more, drying, heat coloring, washing with water, and drying, as shown in FIG. The thickness is about 73 μm, and there is about 92 μm between
An unstained layer 4 of μm remained.

Second Example FIG. 2 (1) is a cross-sectional view, and 1 indicates a fabric, which is a plain weave fabric made of 100% polyester processed yarn and a bleached fabric with a thickness of about 160 μm.

5 shows the coating layer of the combination pattern of two colors on the surface, Part 1
The color is obtained by applying dye solution 6 to a thickness of 80 μm using a patterned gravure roll.
A coating layer 6 is formed.

For other colors, apply dye solution 7 to a thickness of 40 μm using a patterned gravure roll.
A coating layer 7 of m is formed.

On the back side, dye solution 8 was applied to a thickness of 40 μm using a gravure roll.
Coating N8 was formed.

The composition of the dye solution 6 is as follows: Dye (Resolin Blue FBL): 1.5%
Sodium alginate: 4% tartaric acid
=0.3% water
:94.2% above dye? The composition of &7 is: Dye (Miketone Polyred FB): 1% sodium alginate = 4% tartaric acid
=0.3% water
: 94.7% The composition of the dye solution 8 is as follows: Dye (Dianix Brown R): 0.5% Sodium alginate: 4% Tartaric acid
20.3% water
: After applying the dye under conditions of 95.2% or more, drying, heat coloring, washing with water, and drying, the second dye is applied.
As shown in Figure (2), the surface dyeing layer 6a by coating N6
The thickness of the surface dyed layer 7a formed by the coating layer 7 is approximately 35 μm, and the thickness of the back surface dyed layer 8a formed by the coating layer 8 is approximately 35 μm. A dyed layer 4 remained.

Third Example The entire fabric 1 similar to the first example above was dyed in a light color with 0.2% of the disperse dye Resolin Gray FBL.
The front and back sides were dyed in the same manner as in the examples.

The internal structure of the fabric 1 after dyeing was almost the same as that in the first example except that the non-dyed layer in the first example was colored, but the contrast between the front and back surfaces became significantly stronger.

In this way, even if additional dyeing is performed on a fabric that has already been dyed, the same effect can be achieved, and an undyed layer that is not subjected to additional dyeing can be formed inside.

〔Effect of the invention〕

According to the present invention described in detail above, 0.5 to 5% of sodium alginate is mixed into the dye solution to increase the viscosity, and the sum of the thickness of the front side coating layer and the thickness of the back side coating layer of the fabric is determined as the thickness of the fabric. By coating and developing color as shown below and forming a non-dyed layer inside, it is possible to form a dyed layer to the desired thickness on both the front and back sides of the fabric, and a non-dyed layer in between. Because it can be formed, the dyed layers on the front and back sides do not mix, which has the effect of making the colors on the front and back extremely clear.

[Brief explanation of drawings]

FIG. 1 (1) is a sectional view showing the coating layer of the first embodiment of the present invention, FIG. 1 (2) is a sectional view showing the dyeing layer of the first embodiment,
FIG. 2 (1) is a sectional view showing the coating layer of the second embodiment;
FIG. 2 is a sectional view showing the dyed layer of the second embodiment, and FIG. 3 is a sectional view showing the conventional example. 1...Fabric 2.3.6.7.8...Coating layer 2a, 3a, 6a, 7a, F3a...Dyeing layer 4...
unstained layer

Claims (1)

[Scope of Claims] 1. A dyed fabric characterized by having a non-dyed layer between the dyed layer on the front side and the dyed layer on the back side of the fabric. 2. Mix 0.5-5% sodium alginate with the dye solution,
A fabric characterized in that it is coated so that the sum of the thickness of the front coating layer and the thickness of the back coating layer is less than the thickness of the fabric, and a non-dyed layer is formed inside. Dyeing method. 3. The fabric dyeing method according to claim 2, characterized in that the thickness of the non-dyed layer is partially changed. 4. A method for dyeing fabric according to claim 2, characterized in that the already dyed fabric is additionally dyed to leave an undyed layer inside.