JPH0778314B2 - Method for dyeing polyamide fiber structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for dyeing polyamide fibers treated with a polyamide swelling agent.

[0002]

2. Description of the Related Art Polyamide fibers are swollen by applying a polyamide swelling agent such as benzyl alcohol, or contracted by combining this with heat treatment. Various proposals have been made for producing fibrillated (ultrafine) fabrics, densified fabrics and the like (for example, Japanese Patent Publication No. 53-35633 and Japanese Patent Publication No. 61-37383).

A problem with such a fabric containing a polyamide swelling agent is that if dyeing is carried out with the polyamide swelling agent remaining in the fabric, the fastness is markedly deteriorated. Conventionally, a polyamide which has been sufficiently washed with water (soaping) is used. A method of removing the swelling agent, a method of performing a fixing treatment using an oxysulfonate condensate after dyeing, and the like have been known.

[0004]

However, it is difficult to maintain a sufficient dyeing fastness by soaping or fixing treatment. In particular, the present inventors
In the case of a fabric proposed as No. 6924, which is densified by circulating and moving a fiber structure using a polyamide-based fiber in a solution flow of a polyamide swelling agent, the dyeing fastness is remarkably lowered and only by soaping or fixing treatment. It has been difficult to obtain a dyed product that can be used practically.

The present invention has been made to solve the above problems, and an object of the present invention is to improve the dyeing fastness of the polyamide cloth as described above and to provide these dyed articles which can be used practically.

[0006]

According to the present invention, a fiber swelling agent using a polyamide fiber is treated with a polyamide swelling agent, washed with water and dried, and then in a coexistence with water of 100 to 19.
It is characterized in that it is subjected to heat treatment at 0 ° C. and then dyed.

As the polyamide used in the present invention, for example, nylon 4, nylon 6, nylon 7, nylon 1
1, Nylon 12, Nylon 66, Nylon 610, Polymethaxylene adipamide, Polyparaxylylene decanamide, Polybiscyclohexylmethane decanamide and copolyamides containing them are examples of nylon 6, nylon 66. preferable.

These polyamides may be spun singly to form a single yarn fineness of about 0.5 to 8 denier, or may be composite spun with polyethylene terephthalate or a copolymer polyester easily soluble in alkali. The fiber structure referred to in the present invention is a woven fabric, a knitted fabric, a non-woven fabric or the like, and if the main constituent material thereof is the above-mentioned polyamide, polyester, cotton,
Other fibers such as silk and wool may be mixed. However, as described above, the higher the ratio of the polyamide component is, the greater the problem of deterioration in dyeing fastness is. Therefore, when the polyamide component is 70% by weight or more with respect to the fiber structure, the effect is large.

Next, the polyamide swelling agent used in the present invention includes benzyl alcohol, phenol, formic acid, acetic acid,
Examples thereof include emulsions of dimethylformamide, xylene and the like, and an emulsion of benzyl alcohol is particularly preferable. When emulsifying such a polyamide swelling agent, a nonionic, cationic, anionic or mixed surfactant thereof may be added and emulsified and dispersed. When the polyamide swelling agent is treated to densify the polyamide fiber structure in the polyamide swelling agent solution flow,
As a low-concentration solution of about 1 to 10% by weight, this solution may be used at a slightly higher temperature, that is, about 60 to 100 ° C., and at that time, an anionic component is enhanced to improve the emulsifying power in a high temperature range. Is preferably used.

After the polyamide swelling agent is applied and treated, the polyamide swelling agent is temporarily removed by washing and drying steps as in the conventional case. What is important in the present invention is that following these treatments, heat treatment at 100 ° C. or higher is performed in the coexistence of water. Explaining this treatment in detail, moisture is applied to the dried fiber structure. The water content is preferably substantially free of alcohol, phenol, organic acid, dimethylformamide, xylene and the like, and the amount of water added is appropriately about 20 to 100% by weight based on the fiber structure.

Further, as the applying method, it is preferable to use a padding method using a mangle so that the water sufficiently penetrates into the fiber structure. After the water is applied, it is immediately heated to 100 ° C. or higher while keeping the water. When the temperature exceeds 190 ° C, the polyamide component is severely zeated, so 100 to 1
Keep in the 90 ° C range.

The heating method includes a dry heat method using a heat heater, a tenter, a shrink surfer, etc., and a wet heat method of treating in heated steam using a high temperature and high pressure steamer. preferable. The heat treatment may be performed by a dry heat method for 0.5 to 5 minutes and a wet heat method for about 1 to 10 minutes.

After the heat treatment, the fiber structure is dyed with an acid dye, a reactive dye, a metal acetate dye or the like according to a conventional method.

By the above treatment, a dyed product having excellent fastness can be obtained. To further improve the fastness of dyeing,
The following processing may be continuously performed. That is, this is a treatment in which the dye is fixed to the polyamide fiber to be dyed using the tannic acid aqueous solution as the first bath and the sodium aluminate aqueous solution as the second bath. Regarding such processing, Japanese Patent Publication No. 43
As described in JP-A-20968, it is preferable to increase the concentration of tannic acid as compared with the conditions described in JP-A-20968, and it is preferably 0.5 to 12% by weight, more preferably 1.0. It is recommended to add about 7.0% by weight. The tannic acid to be used is a usual tannic acid or a synthetic tannin agent and can be applied in the same manner.

When treating with tannic acid, conventionally known acids such as organic acids such as acetic acid and formic acid and hydrochloric acid are applied as the acids to be added to the treatment bath.

The concentration of sodium amine acid in the treatment with sodium aluminate is preferably 0.1 to 6.0% based on the weight of fiber, and the optimum concentration is in the range of 0.5 to 4.0%.

In that case, the bath ratio is 1:20 to 1: 100.
Is suitable, and the treatment temperature is suitably 20 to 90 ° C.
When the concentration of sodium aluminate is outside the above range, the fixing effect is small, and when the concentration is excessive, the amount of dye lost during and after the treatment increases, which is not preferable.

[0018]

[Example] Fastness was measured by the following method. (1) Lightfastness JIS-L-0842 Class 4 test (1) Washing fastness JIS-L-0844 A-2 (3) Dry cleaning fastness JIS-L-0860 Unless otherwise specified,% is% by weight. Indicates.

Example 1 A plain weaving loom having a warp of 119 yarns / inch and a weft of 86 yarns / inch was obtained by using 115D / 72F 6 nylon multifilament yarn as the warp yarn.

The resulting greige was set on a jet dyeing machine (Vertical Circular, manufactured by Hisaka Seisakusho), and benzyl alcohol 5.0
%, And an emulsifier solution (KM-240 manufactured by Takemoto Yushi Co., Ltd.) 0.5%. That is, while operating the dyeing machine to circulate the raw fabric, the emulsion solution is
After raising the temperature to 80 ° C. in 0 minutes and continuing the treatment for 30 minutes as it is, the emulsion solution is discharged and collected, washed with water and dried to obtain a high-density fabric shrinking 21% in the warp direction and 17% in the weft direction. Obtained.

Then, the woven fabric was put on a padder, water was applied at a pick-up rate of 50%, immediately supplied to a tenter and subjected to dry heat treatment at 180 ° C. for 2 minutes, and then dyed in beige with an acid dye. The results are shown in Table 1.

Example 2 The high-density fabric obtained in Example 1 was hung on a padder, water was applied at a pick-up rate of 60%, and immediately supplied to a high-temperature high-pressure steamer (manufactured by Shanto Tekko Co., Ltd.) at 120 ° C. for 2 minutes. Wet heat treatment (heated steam) was performed, and dyeing was performed in the same manner as in Example 1 to beige. The results are shown in Table 1.

Comparative Examples 1 and 2 What was dyed without water-adding treatment with a padder and dry heat treatment in Example 1 (Comparative Example 1), and dry-heat treatment and dyeing without water-feeding treatment with a padder The results are shown in Table 1 for the product (Comparative Example 2).

[Table 1]

Examples 3 to 8 After dyeing using the dyes shown in Table 2 in Example 1,
An aqueous solution of 6% tannic acid and 3% acetic acid in a bath ratio of 1:50,
After being treated at 60 ° C. for 20 minutes, it was further treated in a sodium aluminate bath (sodium aluminate 3.5% owf, bath ratio 1:50) for 20 minutes (Examples 3 to 5) and tannic acid 6 % Aqueous solution at 60 ° C. for 20 minutes and then 3% tartarite aqueous solution at 60 ° C. for 20 minutes (Examples 6 to 8).

[0025]

[Table 2]

Examples 9 and 10, Comparative Example 3 96 warps / inch using warp yarns of 60-count single yarn wool and 30-denier 6 nylon filament yarn intertwisted yarn and weft yarns of 80-count twin yarn. A plain weave machine having a weft of 61 yarns / inch and a basis weight of 167 g / m ² was obtained (Example 9).

On the other hand, using 80-count double-ply wool as the warp and 100 denier 6 nylon filament yarn as the weft,
Warp 107 lines / inch, weft 72 lines / inch, basis weight 200g
A twill weaving machine of / m ² was obtained (Example 10).

The resulting greige fabric was set on a jet dyeing machine (Versa Saura by Hizaka Seisakusho), and benzyl alcohol was added.
It was treated with an emulsion solution consisting of 0% and 1.0% of an emulsifier (KM-240 manufactured by Takemoto Yushi Co., Ltd.). That is, while operating the dyeing machine and circulatingly moving the raw fabric, the emulsion solution was heated to 80 ° C. for 30 minutes, and after the treatment was continued for another 30 minutes, the emulsion solution was discharged and recovered, washed with water, and dried. In Example 9, 27% in the warp direction and 2 in the weft direction.
%, And in Example 10, a high-density woven fabric was obtained which was shrunk by 1% in the warp direction and 21% in the weft direction.

Next, such a woven fabric is put on a padder, water is applied at a pick-up rate of 50%, and then immediately fed to a tenter to perform a dry heat treatment at 180 ° C. for 2 minutes, and then an acid dye (Everacid milling Red RS 2% owf ). The dyeing fastness of such a fabric is shown in Table 3.

[0030]

[Table 3]

A woven fabric obtained by not treating the woven fabric of Example 9 with benzyl alcohol was obtained (Comparative Example 3). The wool and nylon dyeing densities of these fabrics were measured, and K / S was calculated by the following formula. K / S: apparent density R: reflectance at maximum absorption wavelength The results are shown in Table 4.

[0032]

[Table 4]

As shown in Table 4, those treated with benzyl alcohol have a small difference in dyeing density and high color uniformity.

FIG. 1 shows the changes in K / S of wool and nylon when the concentration of benzyl alcohol was changed in Example 9. Further in the same example, the dye was Neutrich
Fig. 2 shows the change in K / S when the same treatment was performed by changing to romeRed S-GN 2% owf.

[0035]

According to the present invention, the dyeing fastness of a high-value-added fiber structure obtained by treating a polyamide fiber with a polyamide swelling agent can be easily increased to a practical level.
Its usefulness is clear.

Further, when it is applied to a fiber structure mixed with wool, uniform dyeing can be carried out with polyamide, and an extremely high quality dyeing can be obtained in combination with the improvement of fastness.

[Brief description of drawings]

FIG. 1 is a graph showing the K / S change of wool and nylon when the benzyl alcohol concentration is changed.

FIG. 2 is the same graph when the dye is changed in FIG.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Internal reference number FI Technical display location D06P 5/00 103 // D06M 11/05 13/144 D06M 101: 34 (56) References 48-28785 (JP, A) JP 58-36285 (JP, A) JP 38-23293 (JP, B1) JP 50-30755 (JP, B1)

Claims (1)

[Claims] 1. A fiber structure using a polyamide fiber is treated with a polyamide swelling agent, washed with water, dried, and then subjected to heat treatment at 100 to 190 ° C. in the coexistence of water.
A method for dyeing a polyamide fiber structure, which comprises dyeing subsequently.