JPS6317149B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an oil composition for polyamide fibers, and more particularly to an oil composition for obtaining polyamide fibers with excellent level dyeing properties, anti-restain properties, and the like. Conventionally, polyamide fibers have excellent mechanical properties,
It has the advantage of being dyeable under normal pressure, and is used in a wide range of fields such as interior products and automobile interior products in addition to general clothing. In general, polyamide fibers can be dyed with acid dyes, excluding dope dyeing (dope dyeing) for special purposes.
It is usually dyed with anionic dyes such as metal-containing dyes. However, such dyeing has the following drawbacks. That is,
(1) Streaks occur, which are thought to be caused by variations in the amount of dyed seats (the amount of amide end groups in polyamide) and/or differences in the appearance shape characteristics of the fibers (crimping characteristics, gloss, etc.). (2) The anionic dye that has fallen off from the dyed product may re-contaminate the white area (undyed area), resulting in a significant deterioration in the appearance quality of the product. Conventionally, in order to obtain level dyeing properties of polyamide fibers, it was necessary to thoroughly classify each fiber layer and select dyeing conditions for using raw yarn with small fluctuations in the amount of dyeing (use of dyes with excellent level dyeing properties, PH control, Addition of leveling agent,
control of heating speed, etc.). However, it takes a long time for each layer, dyes with excellent leveling properties have poor color fastness, and methods that involve PH control, heating speed control, and adding a leveling agent cannot achieve a certain leveling effect. However, it has drawbacks such as requiring sophisticated control technology, requiring a long dyeing time, and poor reproducibility, and has little industrial utility. In addition, in order to prevent re-staining, there are methods of using dyes with excellent wet fastness and methods of fixing after thorough soaping, but these methods have disadvantages such as large restrictions on the dyes that can be used and the time required for soaping. It lacks practicality. As a result of intensive research into a method for leveling dyeing and preventing re-staining that does not have the above-mentioned drawbacks, the present inventors have discovered that level dyeing and re-staining prevention properties can be obtained by blending a specific treatment agent into the oil agent. Based on these findings, we have arrived at the oil composition of the present invention. That is, the present invention provides an oil agent for polyamide fibers characterized by containing an aromatic sulfonic acid condensate having at least one phenolic hydroxyl group and at least one sulfonic acid group in the molecule and an oil agent. It is a composition. At least 1 in the molecule used in the present invention
Examples of the aromatic sulfonic acid condensate having at least one phenolic hydroxyl group and at least one sulfonic acid group include syntanes. Specific examples include formaldehyde condensates of phenolsulfonic acid, methanesulfonic acid as novolac type resins, methanesulfonic acid as resol type resins, and resins obtained by condensing phenols and naphthalenesulfonic acid with formaldehyde. Particularly preferred are compounds represented by the following general formula (). X: benzene ring, naphthalene ring Y: -SO ₂ -, -SO-, -S-, an alkylene group having 6 or less carbon atoms, an alkylidene group, or two Xs may be directly bonded. Z: ―CO ₂ SO ₃ M, ―SO ₃ M, ―OH, ―CH ₂ OH
Or it is an alkyl group having 1 to 18 carbon atoms, and at least one is -CH ₂ SO ₃ M or -SO ₃ M. m: an integer of 1 to 4 n: an integer of 1 to 9 M: an alkali metal Further specific examples include the following compounds. However, the compound is not particularly limited as long as it is colorless and has a slow dyeing effect on acidic dyes or metal-containing dyes that can ionically bond with the cationic dye sites (amino groups) of polyamide fibers. The molecular weight of the aromatic sulfonic acid compound is one of the factors that greatly influences the slow dyeing effect or re-staining prevention effect of acid dyes and metal-containing dyes, and for improving level dyeing, it is more important than the affinity of the dye used for polyamide fibers. It is preferable to use a small compound, and for prevention of re-staining, a compound having a greater affinity than the dye used. Two or more kinds of these compounds may be used in combination. Swelling agents that may be mixed with the aromatic sulfonic acid compound if desired include monohydric alcohols or polyhydric alcohols such as butyl alcohol, ethylene glycol, and modified products thereof, phenylphenol, methyl benzoate, methyl salicylate, and phthalate. Examples include aromatic compounds such as diethyl acid, phenolsulfonic acid, and benzyl alcohol, but alcohols are preferred, and benzyl alcohol is particularly preferred. When an ester leveling agent is not used, it is preferable to include a swelling agent. In addition, as the oil agent to be blended, for example, spinning,
In order to maintain productivity and performance in stretching, crimping, and other post-processes, it must satisfy required properties such as lubricity, antistatic properties, focusing properties, and heat resistance to withstand thermal decomposition on a heater. Those that satisfy these required properties include monobasic acid esters, dibasic acid esters, polybasic acid esters,
Examples include ester smoothing agents such as glycol esters and polyhydric alcohol esters, but dialkyl esters of aliphatic dibasic acids are preferred;
Specific examples include dipropyl sebacate, dilauryl sebacate, dilauryl adipate, and the like. The ester leveling agent also functions as a swelling agent for polyamide. In addition, liquid oils such as mineral oil and silicone oil can also be used as oils.
Among these, high viscosity mineral oil is preferred. It is particularly preferable to use the above ester smoothing agent and a liquid oil agent together. If desired, the oil agent may be used in combination with a nonionic emulsifier, an antistatic agent, such as an alkylene oxide adduct such as a higher alcohol, a higher fatty acid, or an alkylene oxide adduct such as a higher fatty acid amide, or a Pluronic type activator. The oil composition of the present invention contains 3 to 60% by weight of an aromatic sulfonic acid condensate as active ingredients, and 0 to 60% by weight of a swelling agent.
15% by weight, preferably 5 to 15% by weight, oil agent 10 to 40% by weight, and the remainder consisting of a nonionic emulsifier. is preferred. The ratio of the ester smoothing agent to the liquid oil agent in the oil component is preferably 15-80:85-20 by weight. The oil composition of the present invention is preferably applied to polyamide fibers or threads, particularly undrawn fibers, by known methods such as roller coating, dipping, and removal, and used as a spinning oil for drawing. be. Applicable polyamide fibers include natural polyamide fibers such as wool and silk, but especially synthetic polyamide fibers such as nylon 6, nylon 6,6, nylon 11, nylon 12, aromatic nylon, and protein/acrylonitrile fibers. Good results can be obtained when applied to polymer fibers and the like. The aromatic sulfonic acid condensate used in the present invention improves level dyeing properties and re-staining prevention properties, but the combined use of an ester leveling agent and/or swelling agent prevents the aromatic sulfonic acid condensate from penetrating into the fibers. encouraged,
It can give an excellent level dyeing effect. Swelling agents can also aid in internal penetration of oils.
The ester leveling agent in the oil component is also effective in improving the cohesiveness, spinning drawability, post-process passability, and abrasion resistance of the filament, and the liquid oil agent is effective in improving thread-like cohesiveness, spinning drawability, post-process passability, and abrasion resistance. Effective for improving smoothness. Therefore, the amide fiber treated with the oil composition of the present invention has improved spinning drawability and post-process passability, good abrasion resistance, excellent level dyeing property,
It has anti-staining properties, and excellent level dyeing properties can be obtained even in short-term dyeing without pretreatment such as scouring, and it prevents contamination of white areas when soaping after printing. There is no contamination of the undyed yarn by the dye that bleeds out during washing and wearing of the mixed knitted fabric of dyed and undyed yarns. It has many features such as the ability to create shading effects by using dyes. Although it is unclear why the oil composition of the present invention provides excellent level dyeing properties and anti-re-staining properties, it is unclear why the oil composition of the present invention provides excellent level dyeing properties and anti-re-staining properties. /
Or, by using it with a swelling agent, the anionic compound is uniformly attached to the inside of the fiber surface layer and to each fiber, and the anionic compound and the dye used (anionic dye) have an affinity for the fiber. This is thought to be because the leveling effect or recontamination prevention effect can be obtained depending on the size of the stain. The oil composition of the present invention may further contain fluorescent dyes, blue-tinged dyes, detractors, ultraviolet absorbers, etc., if desired. As a leveling agent for polyamide, it is possible to use a cationic compound that has an affinity for dyes, but this has problems such as compatibility with spinning oils, complex formation with dyes during dyeing, and discoloration. It is inappropriate because of this. The present invention will be explained below with reference to Examples. In addition,
Parts in the examples mean parts by weight. Example 1 Using three types of nylon 6 resins having different amounts of amino terminal groups, three types of undrawn fibers obtained by melt spinning in a conventional manner were treated with the spinning oil shown in Table 1 for each fiber thread ( Nylon BCF (800d/64f) was obtained by applying 4% by weight to dark dyed type:, normal type:, light dyed type:), stretching and crimping.
Using a tufting machine, the obtained thread is
A loop pile carpet was obtained by tufting the base fabric so that the two were adjacent to each other. Then, after wince dyeing with acid dye or metal-containing dye,
A backing agent was applied using a conventional method. The level dyeing properties of the resulting loop pile carpets were evaluated and the results are shown in Table 1.

【table】

[Table] The difference in the dyeing seat is +1% (dark dyeing), -
1% (light dyed) difference. In addition, the level dyeing price is
The dye stage and the degree of streaks were visually judged. As a result, in the comparative example, level dyeing properties were not obtained, and no improvement was observed even when the concentration of the leveling agent was increased. On the other hand, the oil agent according to the present invention, especially one in which a swelling agent was used in combination, gave excellent level dyeing properties. Example 2 The oil agent in Example 1 was prepared in the same manner as in Example 1.
Nylon 6BCF (50d/12f) obtained using No.1
Nylon obtained using fiber thread and oil agent No. 3
Using 6BCF (50d/12f) fiber yarn as the white area forming fiber, and using the nylon 6BCF yarn-dyed yarn obtained using oil agent No. 1 as the colored background forming fiber, a yarn-dyed stripe pattern is created. After creating the mixed knitted fabric, the sweat fastness (JISL-0848A method) and the staining property of the dye from the dyed yarn to the undyed yarn (white area) during washing were evaluated using JISL-0844A-2. As a result, no contamination from the dyed yarn was observed on the fibers treated with the oil agent of the present invention, whereas contamination on the fibers treated with the oil agent of the comparative example was significant, indicating that the oil agent of the present invention has an excellent stain prevention effect. Ta.

Claims (1)

[Scope of Claims] 1. A polyamide fiber comprising an aromatic sulfonic acid condensate having at least one phenolic hydroxyl group and at least one sulfonic acid group in the molecule, and an oil agent. Oil composition for use. 2. The oil composition for polyamide fibers according to claim 1, wherein the aromatic sulfonic acid condensate is a compound represented by the general formula (). X: benzene ring, naphthalene ring Y: -SO ₂ -, -SO-, -S-, alkylene group having 6 or less carbon atoms, alkylidene group, two X
may be directly connected. Z: ―SO ₃ M, ―CH ₂ SO ₃ M, ―OH, ―CH ₂ OH
and at least one is -SO ₃ M, -
_{CH2SO3M .} m: an integer of 1 to 4, n: an integer of 1 to 9 M: alkali metal