JP3345976B2 - Method for producing dyed product of polyamide fiber-containing fiber product - 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 producing a dyed product of a polyamide fiber-containing fiber product, and more particularly, to a method of producing a uniform dyed product of a polyamide fiber-containing fiber product containing polyamide fiber and polyurethane elastic yarn and / or polyester elastic yarn. About the method.

[0002]

2. Description of the Related Art Polyamide fibers have various excellent properties and are therefore widely used as polyamide fiber-containing fiber products such as fabrics such as knitted fabrics. In particular, it has considerable utility as a foundation / watering fabric. There are various methods for dyeing these cloths.

[0003] In the case of polyamide fiber-containing fiber products, in order to stabilize the form of the fabric before dyeing, the temperature must be from 130 ° C to 210 ° C.
At a temperature of 30 seconds to 3 minutes. However, this heat treatment causes a problem that stained spots and stained streaks occur. In other words, there is a defect that the staining property is reduced and stained spots and stained streaks are generated due to variations in heat treatment.

[0004]

The above drawbacks are considered to be due to the fact that the heat treatment for stabilizing the fabric form of the polyamide fiber-containing fiber product reduces the amino terminal groups of the polyamide fiber and makes it difficult for the acid dye to be dyed. It is.

[0005] In other words, a report by Ties Karstens et al. Makromo
l. As described in Chem. No. 191 (1990), amino terminal groups in polyamide molecules are reduced by high-temperature heating, and amide bonds in the polymer main chain are cleaved to form aldehyde and ketone carbonyl groups. However, it is known that this reacts with an amino group to form a yellow chromogen.

Both the heat-induced reduction of the amino end groups and the hot yellowing result in the consumption of amino end groups, thus resulting in a reduction of the dyeing sites of the acid dyes and consequently of the dyeability.

A method for preventing such a decrease in amino terminal group and yellowing by using a semicarbazide compound is disclosed in JP-A-1-229876.

According to this method, even if it is effective for suppressing the decrease of amino terminal groups and preventing yellowing and maintaining dyeing properties, some semicarbazide compounds contain polyurethane elastic fibers or polyester. When dyeing polyamide fiber-containing fiber products containing elastic fibers, some polyurethane elastic fibers or polyester elastic fibers may be dissolved or degraded. May be impaired.

An object of the present invention is to provide not only a fiber product consisting of polyamide fiber alone but also a polyamide fiber-containing fiber product containing a polyurethane elastic fiber and / or a polyester elastic fiber in addition to the polyamide fiber with good levelness and physical properties after dyeing. It is an object of the present invention to provide a method for producing a dyed material capable of keeping the color well.

[0010]

SUMMARY OF THE INVENTION The present invention relates to a polyamide fiber-containing fiber product of the following general formula:
(I) or (II): R - HNNHCO - C n H 2n + 1 (I) R - HNNHCO - (CH 2) m - CONHNH - R (II) wherein R is - (CHR'CH _{2) l} Represents -OH,
R ′ represents H or CH ₃ , n is an integer of 1 to 11, m is an integer of 1 to 11, and l is an integer of 1 to 11]. The present invention relates to a method for producing a dyed product of a polyamide fiber-containing fiber product, which comprises heat-treating and then dyeing.

[0011] The polyamide fiber-containing fiber product used in the present invention is not only a knitted and woven fabric composed only of polyamide fiber but also a knitted and woven fabric containing polyurethane elastic fiber and / or polyester elastic fiber in addition to polyamide fiber.

The polyamide fibers which can be used in the present invention include any well-known polyamide fibers such as nylon 6, nylon 66 and nylon 46, and also include modified cationic dyeable products.

The polyurethane elastic fibers that can be used with the polyamide fibers in the present invention include those known to those skilled in the art, for example, segmented polyurethane having at least 8 fibers.
It is an elastic yarn occupying 5%, and is a usual ether type or ester type polyurethane elastic yarn.

The polyester elastic fiber which can be used together with the polyamide fiber in the present invention can be a polyester elastic fiber known to those skilled in the art.
II)

Embedded image Some are represented by

[0015] The polyamide fiber-containing fiber product used in the present invention may be a fiber product consisting of only the polyamide fiber as described above, or a fiber product made by a usual cross-knitting method containing this and polyurethane elastic fiber and / or polyester elastic fiber. There can be.

The use concentration of the compound of the formula (I) or (II) is 0.1 to 5% based on the polyamide fiber-containing fiber product.
owf is selected from the range. If the concentration used exceeds the above range, the effect may be reduced, which is not economical. On the other hand, when the amount is small, the leveling property is lacking.

Specific examples of the application method using the hydrazide compound of the above general formula (I) or (II) include a heat setting at the time of applying an oil agent at the time of producing a polyamide fiber-containing fiber product, an oil agent at the time of false twisting, and a dyeing step. Can be applied at any time such as in the pretreatment step. In general, it is preferable to apply the aqueous solution or the aqueous dispersion of the compound immediately before the step of presetting the polyamide fiber-containing fiber product. Further, as the applying method, an arbitrary method such as an immersion treatment in a liquid, a padding method, a coating method, a printing method, and the like, which are employed in ordinary dyeing, can be used.

The dry heat treatment in the present invention is aimed at stabilizing the dimension of a polyamide fiber-containing fiber product, for example, a fabric, and is carried out at a temperature of 130 ° C. to 210 ° C. as conventionally performed.
The processing is performed for a time of 0 second to 3 minutes, and is usually performed by a setter.

The dyeing operation in the present invention can be carried out by a batch system or a continuous system using an apparatus such as a winch, a jigger, a beam or a liquid jet dyeing machine.
The dyeing temperature at the time of dyeing may be any temperature at which the polyamide fiber is usually dyed, but is generally preferably 80 ° C. or higher. In the dyeing operation of the present invention, the type of dye, dyeing auxiliary, their concentration used, dyeing pH, dyeing bath ratio,
The dyeing time, post-treatment after dyeing, and the like may be any conditions as long as the conditions are the same as those applied to ordinary polyamide fibers, and are appropriately set depending on the type of the object to be dyed and the type of the processing apparatus.

When the fiber product comprising the polyamide multifilament and the polyurethane elastic yarn and / or the polyester elastic yarn is a cross-knitted fabric, the polyamide multifilament and the polyurethane elastic yarn and / or the polyester elastic yarn are each knitted by a knitting machine and a loom. Any of knitted and woven fabrics obtained by supplying to the fabric may be used.

[0021]

The present invention will be described below with reference to examples. However, the present invention is not limited by these examples.

The evaluation method used in the present invention is described below.

1. Retention rate of amino terminal group content of polyamide fiber: A polyamide fiber sample was dissolved in a phenol solution, and pH titrated with hydrochloric acid.
eq / g) and the retention of the amount of amino terminal groups was determined by the following equation. [Retention of amino terminal group amount (%)] = [amino terminal group amount after dry heat treatment] / [amino terminal group amount before dry heat treatment] × 1
00

2. Tensile retention of fabric: 10 cm × 5 cm of fabric was measured by using Tensilon manufactured by Toyo BOLDWIN.
The stress at the time of 00% elongation was measured, and the strength retention of the fabric was determined by the following equation. [Strength retention of fabric (%)] = [Strength after dyeing finish]
/ [Green machine stress] × 100

Example 1 40d / 12f nylon filament and 40d / 4f
After knitting a 2-way knitted fabric knitted with polyurethane elastic yarn of the following formula, scouring is carried out by a conventional method, and a hydrazide compound of the compound (a) represented by the following formula is padded with 1% o.
After applying wf and presetting at 190 ° C. for 30 seconds, a milling type blue acid dye (product name: Ka
Yanol Milling Turquoise Blue 3G [Nippon Kayaku]) and boil in a dyeing solution containing a leveling agent and a pH adjusting agent.
After dyeing for a minute, a tannic acid-based fix treatment was carried out in a conventional manner, and the product was dried and set. Table 1 shows the retention ratio of the amino terminal groups of the obtained fabric and the quality after dyeing and finishing.

C ₁₁ H ₂₃ − CONHNHCH ₂ CH ₂ —OH (a)

Comparative Example 1 A fabric was obtained in the same manner and under the same conditions as in Example 1 except that a semicarbazide compound represented by the following chemical formula (b) was used instead of the hydrazide compound. Table 1 shows the amount retention and the quality after dyeing.

(CH ₃ ) ₂ NNHCONH − (CH ₂ ) ₆ − NHCONHN (CH ₃ ) ₂ (b)

Comparative Example 2 A fabric was treated in the same manner and under the same conditions as in Example 1, except that the fabric was treated with mere water containing no compound before the pre-setting step. The rate and quality after dyeing are shown in Table 1.

[0030]

As is clear from the data shown in Table 1, after the treatment with the hydrazide compound according to the present invention, a dry heat treatment and dyeing improve the retention of the amount of amino terminal groups, and thus provide good leveling properties and reduced physical properties. A fiber product composed of a polyamide multifilament and polyurethane elastic yarn, which has a small amount of polyurethane, can be realized.

Example 2 The procedure of Example 1 was repeated using the hydrazide compound of the following formula (c) in place of the hydrazide compound used in Example 1. Table 2 shows the retention ratio of the amount of amino terminal groups and the quality after dyeing and finishing of the obtained fabric.

HOCH ₂ CH ₂ NHNHCO- (CH ₂ ) ₄ -CONHNHCH ₂ CH ₂ OH (c)

[0034]

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-124695 (JP, A) JP-A-5-195449 (JP, A) JP-A-1-229876 (JP, A) JP-A-4-199 352761 (JP, A) JP 52-35647 (JP, B1) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06P 5/00 103 D06P 3/24 D06P 1/642

Claims (1)

(57) [Claims] 1. A polyamide fiber-containing fiber product,
Following formula 0.1~5% owf (I) or (II): R - HNNHCO - C n H 2n + 1 (I) R - HNNHCO - (CH 2) m - CONHNH - R (II) [wherein R represents — (CHR′CH ₂ ) ₁ —OH;
R ′ represents H or CH ₃ , n is an integer of 1 to 11, m is an integer of 1 to 11, and l is an integer of 1 to 11]. A method for producing a dyed product of a fiber product containing a polyamide fiber, which comprises heat-treating and then dyeing.