JPH0518957B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a method for treating dyed polyamide fibers, in which fixing treatment and softening treatment are carried out in two stages in one bath, thereby increasing color fastness, shortening treatment time, and reducing temperature. This makes it possible to reduce costs through processing. (Prior Art) Conventionally, acidic dyes, metal-containing dyes, and the like have been used to dye polyamide fibers such as nylon 6 and nylon 6-6, and a fixing treatment has been performed to increase the wet fastness after dyeing. Most of these treatments form a film on the fibers due to ionic bonds, hydrogen bonds, and van der Waals bonds, but in such treatments, the temperature at 70°C is
The above liquid temperature is required, and depending on the material and dyed color, the film strength may be low, so there is a problem that sufficient fastness cannot always be obtained. On the other hand, dyed objects that have been dyed have a rough and hard texture during the process, and to improve this, they are treated with a cationic, nonionic, or other softening agent. The above-mentioned treatments are performed separately as post-dying steps, and after the fixing treatment, it is customary to perform a softening treatment in a separate bath. However, carrying out these treatments in one bath has problems in terms of the combination of treatment agents and treatment effects, and is currently not in practical use. (Problems to be Solved by the Invention) The present invention solves this problem by performing fixing processing and softening processing in two stages in a single bath at a low temperature. This solves the problem of increased energy costs due to processing. (Means for Solving the Problem) However, in the process of the present invention, dyed polyamide fibers are treated with the general formula A co-oligomer of a sulfonated synthetic tannin represented by, where n=6 to 8, and the general formula The product is immersed in a mixed treatment bath of copper chloride of methacrylic acid represented by the following formula, and then, in the bath, a mixture of sequestered amino silicone and a polyamine softener is used as the main ingredient, and a stabilizer is mixed therein. This is a method for treating dyed polyamide fibers, which is characterized by adding a softener and performing a similar soaking treatment, dehydrating the fibers, and then heat-treating the fibers at a temperature of 100°C or higher. Bath temperature 50
It is characterized by being processed at a low temperature of ℃ or less. (Function) That is, in the present invention, by treating with a mixed treatment agent of a selected fixing agent and a crosslinking agent,
It is now possible to process at an extremely low temperature of °C, and after sufficiently adsorbing it, it can be dehydrated by adding a specific softener that is compatible with the fixing agent into the bath. after
Heat treatment at a high temperature of 100 to 130°C, especially wet heat treatment, crosslinks the adsorbed fixing agent, achieving high fastness and making it possible to obtain a polyamide product with a good hand feel due to the softening agent. It is something. That is, in the conventional method, if the fixing and softening treatments were performed in the same bath, complexes would occur because the ionicity of the fixing agent and the softening agent were different, and there was a concept that the fixing treatment required high temperatures, but the present invention This was overcome in . Incidentally, the blocked amino silicon in the present invention can be exemplified by the one represented by the following formula. However, X: _{C2H4NH ~ CH2OH} or _{C2H4NH ~} ( _CH2CH2O )PHR: _CH3 or _OCH31 :2~3 m:n=100 _: 0.5~ 1.0 The reaction mechanism between the fixing agent and its crosslinking agent is that due to the coupling action of the crosslinking agent, an extremely thin film is formed on the (-) charged surface of the amide group of the polyamide fiber, and the unsaturated film on the opposite surface is coupled. By coupling the part with the fixing agent. This type of coupling partially works at low temperatures ranging from room temperature to about 50°C, and through heat treatment, a very strong crosslink is created between the polyamide fibers and the fixing agent through a crosslinking agent, giving adhesive properties and high adhesive properties. It is possible to obtain fastness. Furthermore, the reaction mechanism of such fixing agents with acidic dyes is ionic bonding and insolubilization of the dye by resin sequestration, thereby increasing color fastness. That is, the present invention achieves high fastness through crosslinking for fixing, and for softening, by adding a highly compatible softening agent after sufficiently absorbing the fixing agent. It is something that can be effective. Further, there is an advantage that the heat treatment for crosslinking can be performed concurrently with the setting step. Further, the temperature of the immersion treatment in the bath follows the reaction mechanism described above, and treatment can be performed at a low temperature of 50° C. or lower. Examples will be described below. Example 1

[Table] A knitted fabric knitted with 15 denier, 5 filament, 6 nylon yarn dyed under the above conditions was subjected to dipping treatment under the following conditions.

[Table] However, GKF-5 is a co-oligomer of a sulfonated synthetic tannin consisting of the following structural formula, Moreover, CCY has the following structural formula. Furthermore, MF (softener manufactured by Shichifuku Chemical Co., Ltd.) contains 3 sequestered amino silicone and polyamine-based softeners:
2 and a small amount of a stabilizer for the purpose of preventing precipitation. Such a blocked amino silicone is a polysiloxane with side chains containing -
The amino silicone and polyamine softener into which CH ₃ NH ₂ is introduced is acetate, a condensate of stearic acid and aminoethylethanolamine, and the stabilizer is polyoxyethylene sorbitan fatty acid ester. After pulling out the knitted fabric soaked in the above manner from the bath and dehydrating it, it was heated at 115℃ for 10 minutes without drying.
Added heat set for seconds. (Effects of the invention) The dyed material treated in this way has a washing fastness of one grade or more improved by the A-2 method compared to the dyed material treated in two stages of fixing treatment and softening treatment, and is also inferior in texture. It was something I didn't have. In addition, the processing time is approximately 1/2 that of conventional methods, and while conventional fix processing requires a processing temperature of 80°C, processing can be performed at half that temperature. It is possible to improve performance and reduce energy costs. As described above, the present invention performs fixing treatment and softening processing in two steps in one bath, increasing color fastness,
This is an unprecedented processing method that can shorten processing time and reduce costs due to low-temperature processing.

Claims (1)

[Claims] 1. Dyed polyamide fibers according to the general formula A co-oligomer of a sulfonated synthetic tannin represented by, where n=6 to 8, and the general formula It is immersed in a mixed treatment bath of copper chloride of methacrylic acid represented by the following formula, and then, in this bath, a mixture of a sequestered amino silicone and a polyamine softener is used as the main ingredient, and a stabilizer is mixed therein. A method for treating dyed polyamide fibers, which is characterized by adding a softener and performing a similar soaking treatment, followed by dehydration and then heat treatment at a temperature of 100°C or higher. 2. The method for treating dyed polyamide fibers according to claim 1, characterized in that the treatment is carried out at a temperature of the dipping bath of 50° C. or lower.