JPS61252380A - Production of polyester different color knitted fabric - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method for producing a polyester-based woven or knitted fabric of different colors.

(If) Conventional Technology Polyester fibers have excellent properties such as pleat retention, strength retention, and functionality, and their uses are wide-ranging, such as interweaving with other fibers and interweaving.

In the clothing field, synthetic raw eel fibers are also in high demand.

Conventionally, in order to obtain polyester fibers with unique color effects,
Polyester fibers are yarn-dyed into a unique color (usually called yarn-dyed yarn) and then woven.

The knitting method is used, but it is economically disadvantageous because the yarn-dyed yarn is dyed in a cheese-like or skein-like shape, and the process is diverse, such as cone winding, weaving, and spinning.

In addition, it is dyed with a solid solution, mainly using disperse dyes.
For example, in the case of different colored woven and knitted fabrics such as white-red, white-combined, white-black, etc., the contamination transferred to hot water during home washing is significant and causes a bad product image.

Therefore, in order to meet the demand for improved color fastness, cationic dye-dyable polyester fibers with sulfonic acid groups introduced have been developed in recent years, and a typical example is Dacron T-62.
, T-64 (manufactured by DuPont), but since this cationic dyeable polyester fiber is dyed by cationic dye and ionic bond, the amount of sulfonic acid groups introduced is usually 2.0 mo1% or more due to its dyeability. has been done.

By dyeing the woven or knitted fabric made of this cationic dyeable polyester fiber and ordinary polyester fiber (polyethylene terephthalate fiber) with a cationic dye, 1) piece-dyed woven or knitted fabrics such as white-red, white-combined, white-black, etc. It has become possible to produce ml products with good fastness.

However, cationic dye-dyeable polyester fibers with 2.0 mo1% or more of sulfonic acid groups introduced have low strength as raw yarns themselves, and the strength is significantly reduced by false twisting and dyeing. High temperature dyeing is prohibited. In addition, 1. In order to prevent cationic dye staining on the normal polyester fiber side, it is preferable that the pH of Toka be low, but sulfonic acid groups 2. In the case of polyester fibers that can be dyed with cationic dyes with a pH of 1 or more, the pH is 6 to 1.
The range of 3.5 is the limit, and it is difficult to completely prevent cationic dye staining on ordinary polyester fibers, especially in dark colors. It is difficult to obtain fabric quality.

(c) Problems to be Solved by the Invention The present invention has been made in view of the current situation as described above, and it is possible to prevent cationic dye contamination of ordinary polyester fibers (polyethylene terephthalate fibers) without any decrease in tenacity. The purpose of this invention is to produce a unique mw material using polyester fiber containing sulfur isophthalate.

(d) Means and action for solving the problems The present invention includes:
In order to achieve the above object, the present invention has the following configuration.

That is, the present invention uses a cationic dyeable polyester fiber containing 0.8 to 1.8 mo 1% of 5-alkali metal sulfur isophthalate and a polyester fiber that does not contain the sulfur isophthalate. , and then dyed with a cationic dye at pH 3 or lower and at 125°C or higher in a dye bath containing 0.1 to 3 g/It of inorganic salts.
The gist of this invention is a method for producing a polyester-based woven or knitted fabric of different colors, which is characterized by dyeing at a temperature of 0°C or lower. According to the present invention, it is possible to obtain a polyester woven or knitted fabric with an excellent unique color effect without any decrease in tenacity.

The present invention will be explained in detail below.

In the method of the present invention, first, polyester fibers containing 0.8 to 1.13 mo 1% of 5-alkali metal sulfide isophthalate and polyester fibers that do not contain the sulfide isophthalate are woven or knitted. Or to form a knitted fabric (hereinafter collectively referred to as a woven or knitted fabric). 5-Alkali metal-sulfur isophthalate (
Hereinafter, it will be abbreviated as sulfur isophthalate. ) means the sodium salt or potassium salt of 5-sulfoisofucuric acid. In addition, the polyester fiber that does not contain sulfur isophthalate here means ordinary polyester fiber such as polyethylene terephthalate fiber, but the other polyester fiber that contains sulfur isophthalate that is used in combination with this fiber is , refers to a fiber in which a sulfonic acid group is introduced into the main chain, side chain, or end of polyethylene terephthalate, and may be introduced in any form such as copolymerization or blending. The latter fiber containing sulfur isophthalate needs to contain 0.8 to 1.8 mo1% of sulfur isophthalate. Sulfur isophthalate 0.8-1.8
Polyester fibers containing 1% molybdenum have strength similar to that of ordinary polyester fibers, are versatile in false twisting, and can be dyed satisfactorily with cationic dyes alone.

If the amount of sulfur isophthalate is less than 0.8 mo1%, no matter how you consider the dyeing conditions, dyeing can only be done to a medium color or lower density. this is,
This is because dyeing is performed by ionic bonding between the sulfonic acid groups contained in the fibers and the cationic dye, so if the amount of sulfur isophthalate is less than 0.8 mo1%, the dyeing capacity of the fibers is too small. On the other hand, when sulfur isophthalate is more than 1.8 mo1%, there is sufficient dyeing capacity for cationic dyes, but no matter how much dyeing capacity there is, in order to obtain a deep color, it is necessary to ℃ is required, so a decrease in the strength of the fiber cannot be avoided. In addition, sulfoisophthalate is added to l, 3
Fibers containing more than 1% have a strong problem with the pH of the dye bath.
Since it is not possible to reduce the number of polyester fibers to 3 or less, it is impossible to completely prevent cationic dye staining on ordinary polyester fibers. Furthermore, when performing false twisting, etc., there is a restriction that the false twisting temperature cannot be raised, making it impossible to obtain a unique woven or knitted fabric of good quality.

For the above reasons, in the method of the present invention, polyester fibers containing 0.8 to 1% of sulfoisophthalate and 1% of 8n+o are used, but if even higher level performance is required, 1% of sulfoisophthalate is used. 0-1, 7
It is preferable to use polyester fiber containing 1% no.

In the present invention, two types of fibers are used as described above, but these fibers may be combined at the time of weaving or knitting by interweaving, interknitting, etc., or by aligning both in the state of fibers, It may be used by twisting or mixing fibers. In the present invention.

Next, the above woven or knitted fabric is dyed with a cationic dye (pi (3 or less).

Add 0.1 to 3 g/It of inorganic salts (e.g. neutral salts such as Glauber's salt and sodium chloride) to the It dye bath and dye at 125°C or above.
Dye at temperatures below 40°C. In the method of the present invention, p
It is necessary to dye woven or knitted fabrics at H3 or lower.

This is because when dyeing at high temperatures with cationic dyes, the cationic dyes generally decompose and not only do the reproducibility of hues deteriorate, but the decomposed products also tend to contaminate the regular polyester fibers. On the other hand, this tendency (dye decomposition, etc.) can be suppressed to a considerable extent in the pH range of 2 to 3.

The inorganic salts added to the dye bath are neutral salts such as sodium sulfate (NazSo4) and sodium chloride (NaCl), and the reason for adding the inorganic salts is as follows. That is, when dyeing at high temperature in a dye bath with a pH of 3 or less, cationic dye-dyeable polyester fibers undergo hydrolysis and strength decreases, but this decrease in strength can be reduced by adding 0.1 to 3 g/l of inorganic salts. This is because it can be prevented in advance. 3 inorganic salts
g/j! Additions in excess of this increase the slow dyeing effect and do not adversely affect the strength, but on the contrary, contamination of ordinary polyester fibers increases, which is unsuitable. Furthermore, if the amount of inorganic salts added is 0.1 g/β or less, the effect of suppressing the decrease in fiber strength becomes weak. It is necessary to carry out dyeing at a temperature of 125°C or higher and 140°C or lower. Even if the above fabric is dyed at the conventional dyeing temperature of 120° C., only a medium color density can be obtained. The polyester fibers dyeable with cationic dyes used in the present invention have little loss of yarn strength when dyed at high temperatures, so there is no problem with the physical properties of the fibers even when dyed at temperatures of 125°C or higher. concentration is obtained.

The present invention has the above-mentioned structure.1 According to the present invention, a polyester-based mW with an excellent unique effect without a decrease in strength is produced.
can get things.

(f) Examples Next, the present invention will be explained with reference to examples. The performance of the woven and knitted fabrics in the examples was measured and evaluated by the following method.

(1) White leaving effect Contamination gray scale (JIS-L
-0805) (2) Tear strength JIS-L-1018 Pensulum method (3) Strength Unravel the fibers of the dyed part and JT
Measurement Example 1 with SL-1090 5-sodium-sulfoisophthalate at 1°5tm
o A 2/2 twill weave twill using a blended yarn of 75 denier/36 filament polyester fiber containing 1% and normal polyester fiber 75 denier/36 filament containing no sulfoisophthalate for both the warp and 17s yarn. was woven. Next, apply this fabric to the following recipe 1 for 13 minutes.
Staining was carried out for 30 minutes at 0°C.

Prescription I Aizen Cathilon Blue BRLH (
Cationic dye manufactured by Hodogaya Chemical Co., Ltd.) 2% otmf Formic acid (80%) Adjusted to 9B3 Anhydrous sodium sulfate 1 g/41' Bath ratio 1:
30. ,.

After dyeing, incubate at 70°C with a solution containing 1g/2 of nonionic surfactant.
Soaped for 20 minutes at 1, then dried at 120°C.
Dry heat setting was performed at 70° C. for 1 minute to obtain a uniquely colored fabric of the present invention.

For comparison with the present invention, different colored fabrics of Comparative Examples 1 to 3 below were created.

Comparative Example 1 A different-colored fabric was created using the same method as in this example except for removing the anhydrous sodium sulfate in formulation 1 of this example.

Comparative Example 2 A different-colored fabric was created using the same method as in this example except that the pH in formulation 1 of this example was adjusted to 5.

Comparative Example 3 A uniquely colored fabric was created by scraping anhydrous sodium sulfate using the method of Comparative Example 2 above.

Here, the performance of nine different-colored fabrics produced by the method of the present invention and the fabrics of Comparative Examples 1 to 3 was measured, and the results are shown in Table 1.

As is clear from Table 1, the fabric produced by the method of the present invention did not deteriorate in strength (and did not contaminate the ordinary polyester fiber portion, leaving a complete white residue and achieving a good unique color effect). .

On the other hand, the fabric of Comparative Example 1 had a good white-leaving effect, but the 2-strength was significantly reduced. In addition, although the fabrics of Comparative Examples 2 and 3 did not have a decrease in strength, they were highly contaminated with hot water and had a poor white leaving effect.

Example 2 1.5 mo of 5-sodium-sulfoisophthalate
We prototyped a false-twisted yarn of 150 denier/48 filaments containing 1% polyester fiber and 150 denier/48 filament of normal polyester fiber that does not contain sulfoisophthalate.
It was cross-knitted into a striped pattern at a ratio of 1:1 with 8 filament false twisted yarn. Next, apply this knitted fabric to 130cm using the following recipe 2.
Staining was carried out for 30 minutes at °C.

Formulation 2 Diacryl Black RTL-PF (Mitsubishi Kasei product cationic dye) 3.5% owf Formic acid (80%) Adjusted to pH 3 Anhydrous sodium sulfate 1 g/12 Bath ratio 1:3
0 After staining, incubate at 70°C with a solution containing 1g/β of nonionic surfactant.
After soaping for 20 minutes at 100°C and drying at 120°C, dry heat setting was performed at 170°C for 1 minute.

A unique knitted fabric of the present invention was obtained.

For comparison with the present invention, different colored knitted fabrics of Comparative Examples 4 to 6 below were created.

Comparative Example 4 A uniquely colored knitted fabric was prepared in the same manner as in Example except that the anhydrous sodium sulfate in Formulation 2 of this Example was removed.

Comparative Example 5 A different-colored fabric was created using the same method as in this example except that the pH in formulation 2 of this example was adjusted to 5.

Comparative Example 6 A uniquely colored knitted fabric was created by scraping anhydrous sodium sulfate using the method of Comparative Example 5 above.

Here, the performance of the different-colored knitted fabrics produced by the method of the present invention and the knitted fabrics of Comparative Examples 4 to 6 was measured, and the results are shown in Table 2.

Table 2: As is clear from Table 2, the strength of the knitted fabric produced by the method of the present invention was reduced, there was no staining of the ordinary polyester fiber portion, and good striped knitted fabrics in white and black were obtained. .

On the other hand, the knitted fabric of Comparative Example 4 had a good whitening effect, but the strength was significantly lower. Further, although the knitted fabrics of Comparative Examples 5 and 6 did not have a decrease in strength, they were highly contaminated and became striped knitted fabrics that were stained with hot water.

(f) Effects of the invention The present invention has a sulfoisophthalic acid component of 0.8 to 1.8
A fabric made of cationic dye-dyeable polyester fibers and polyethylene terephthalate fibers containing 1% a+o is dyed at high temperature with cationic dyes at a dye bath pH of 3 or less and an inorganic salt content of 0.1 to 3 g/l. According to the present invention having such a structure, there is no decrease in strength,
Additionally, it is possible to produce a mW product with good different color effects without cationic dye staining on the polyethylene terephthalate fiber side.

Claims (1)

[Claims] (1) 0 5-alkali metal sulfoisophthalate
．． Weaving or knitting using a cationic dye-dyable polyester fiber containing 8 to 1.8 mol% and a polyester fiber that does not contain the sulfoisophthalate, and then using a cationic dye to adjust the pH to 3 or less and inorganic salts to 0.1. ~3g/
1. A method for producing a polyester-based different-colored woven or knitted material, characterized in that it is dyed at a temperature of 125° C. or higher and 140° C. or lower in a dye bath containing l.