JPH0284591A - Densely dyeing method for high-density knitted fabric - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for deep dyeing a high-density woven or knitted fabric made of ultrafine fibers having a single filament fineness of 1 denier or less.

(Conventional technology and its problems) Traditionally, fabrics for suede-like leather, dungeons, etc., have been made using ultrafine fibers with a single yarn denier of 1 or less and the same fineness from the viewpoint of appearance, feel, and physical properties. It's here. When dyeing the fabric, the surface area increases as the fibers become thinner, and diffuse reflection (reflected light) on the fiber surface increases.
There is a problem in that the colored light is weakened by scattering of light, and the apparent density of the surface is reduced, making it impossible to obtain a deep color. Therefore, in order to obtain a deep color, a large amount of dye is required, resulting in a decrease in the dye utilization rate and problems with wastewater treatment, resulting in an increase in cost.

In order to solve these problems, Japanese Patent Application Laid-Open No. 53-268
Publication No. 7 discloses that a 7-coloring agent is added to at least one plate of a polymer forming ultra-fine fibers such as a split type composite 9-fiber, composite spinning is performed to form a fabric, and then the fabric is colored in a deep color. A method has been proposed in which deep colors can be obtained, but if the loft size of the fabric to be dyed is small, adding a coloring agent to the polymer will significantly increase costs. There was a problem.

Also, JP-A-52-! Publication No. 7881 proposes a method of adding an organic solvent-based swelling agent to the dyeing of polyester ultrafine fibers, and by this method, a product with improved color development on the fabric surface can be obtained. However, there were difficulties in treating organic solvent wastewater.

The present invention was made to solve the above-mentioned problems when dyeing high-density woven and knitted fabrics, and it is possible to dye high-density woven and knitted fabrics in deep colors without adding a coloring agent to the polymer and under normal dyeing conditions. The purpose is to provide a method for dyeing.

(Means for Solving the Problems) The above purpose is to form a woven or knitted fabric using fibrillated dFa, which is made of polyamide and polyester and can yield ultrafine fibers with a single filament fineness of 1 denier or less after fibrillation. In a method for dyeing high-density woven or knitted fabrics, in which fibers are fibrillated, fibrillated, and then dyed, fibrillated conjugate fibers can be used to obtain ultrafine fibers of different fineness with a single filament fineness of 1 d ÷ or less. This is achieved by the characteristic deep dyeing method of high-density n-terminals.

The term "fibril" used in the method of the present invention refers to a large number of fibrils that are bundled together to form a fiber bundle with a fine degree of fineness. It can be easily obtained by dividing it into each component by suitable means.

The fibrillated composite fiber used in the method of the present invention is one in which polyamide and polyester are formed so that one component does not completely surround the other component in the cross section of a single filament, and the fibrillated composite fiber is formed along the longitudinal direction of the single filament. This term refers to composite taI fibers that are joined together and have different finenesses after fibrillation, and specifically have a side-by-side repeating cross section. 1B.

A composite fiber consisting of a component having a radial shape and another component having a shape that complements the radiating portion, a component having a radial shape and a 7-shaped recess that complements the radiating portion and faces toward the center. Composite m fibers made of the same component as the component having a radial shape having a 7-shaped shape that complements the concave part and another component having a certain shape, and side-by-side repeating composite fibers having a hollow portion, etc. It will be done. Among these composite fibers, composite fibers having a side-by-side repeating cross section with or without hollow portions, from the viewpoint that it is easy to obtain ultrafine fibrils with a single filament fineness of O, S denier or less,
Composite fibers with components having a radial shape in cross section are preferred; however, in terms of manufacturing composite fibers, from the viewpoint of stability of the cross-sectional morphology of both raw fibers, composite fibers with components having a radial shape in cross section are preferable. Composite fibers are preferred.

Examples of polyamide include nylon 4°, nylon 61, nylon 11, nylon 11. Nylon 12. Nylon 6G, nylon 6/10. Polymethaxylene adipamide, polyvaraxylylendanamide. Examples include polybiscyclohexylmethanedecanamide and copolyamides containing these as components.

Examples of the polyester include polyethylene terephthalate, polytetramethylene terephthalate, polyethyleneoxybenzoate, poly1,4-dimethylcyclohexane terephthalate, polypivalolactone, and copolyesters containing these as components.

The woven or knitted fabric using the fibrillated composite fiber according to the method of the present invention may be any of plain weave, twill weave, satin weave, knitted fabric, flat knitted fabric, circular knitted fabric, etc., and is not particularly limited.

In the method of the present invention, an agent that swells polyamide (hereinafter referred to as a "fibrillating agent") is applied to these woven or knitted fabrics to fibrillate the fibrillated composite fibers constituting the woven or knitted fabrics.

Here, specific examples of the fibrillating agent include benzyl alcohol, β-phenylethyl alcohol, phenol, m-cresol, formic acid, and vinegar M. It is also suitable to use it as an aqueous solution or emulsion. Particularly, among the above methods, the method using an aqueous emulsion of benzyl alcohol is most suitable for the method of the present invention in terms of the fibrillating effect and the relatively easy handling.

In order to make an aqueous emulsilone of the above fibrillating agent, a surfactant may be added to the fibrillating agent and emulsified and dispersed. The active agent may be an amphoteric active agent, an amphoteric active agent, or a mixture thereof. It is also good to stabilize the emulsion by adding a thickening agent such as a general emulsifier or a sizing agent.

The 0 degree of the fibrillating agent needs to be 1.5ffii% or more in order to obtain the fibrillating effect.

In the fibrillation method of the present invention, the woven or knitted fabric to be treated is immersed in a treatment solution containing a fibrillation agent as described above, or
Impregnating or applying a treatment liquid to the woven or knitted fabric. In the case of the above method, the progress of fibrillation can be further promoted by moving the treated woven or knitted fabric and/or the treatment solution, rather than simply leaving it to soak.This method includes, for example, stirring the treatment solution, using a washing machine, or dyeing. There is a method using equipment such as a machine. In addition, in the case of the method described later, the progress of fibrillation can be promoted by squeezing with a mangle or dehydrating with a dehydrator after normal impregnation or coating. The temperature of the treatment liquid is 5 to 50°C, preferably 10 to 50°C.
A temperature of 40° C. is preferable; a high temperature is not preferable because fibrillation is rather suppressed.

In the method of the present invention, the woven or knitted fabric is then washed to remove the fibrillating agent from the woven or knitted fabric, and then dried.

In the method of the present invention, the dyeing method is not particularly limited, but
Dipping dyeing, pad steam, pad thermosol, spray dyeing, textile printing, etc. are usually used. In addition, resin processing, raising, shirring, etc. are performed as necessary.

(Function) In the method of the present invention, since the single filaments after fibrillation have different finenesses, the thicker fineness portions are dyed in a dark color, increasing the density as a whole. In addition, the finer fineness portions are packed in between the mutual openings of the thicker fineness portions, and instead of creating a chambray tone like usual blended yarns with different finenesses, the dyed surface is uniform and the holes are formed. The density becomes ζ.

(Example) Next, the method of the present invention will be specifically explained based on Examples.

Example (1) Superfibrillar type composite am having a cross section as shown in Figure 1, and the A component is nylon 6 and the B component is polyethylene terephthalate (hereinafter referred to as r).
PETJ), and the volume ratio of nylon 6 and PET is 1:2, and the single yarn after fibrillation is 0.5
5 D 1 piece, 0.2 rJ D 2 pieces, 0. +2
D: A fibrillated composite fiber of different m degree with 50 denier/25 filaments composed of 5 filaments was prepared.

(2) Fabric production Fabrics as shown in Table 1 were woven using the above-described fibrillated composite fibers.

(Extra 1. White) (3) Processing of textiles To each of the three types of textiles obtained by the above weaving, add benzyl alcohol 18 ml emulsion at 30°C (as an emulsifier, add Sanmol BKCOnC manufactured by Nikka Ka Handmade). 1.5%) was used as a pad, and then washed with warm water at 60°C for about 5 minutes and dried.

Thereafter, presetting was performed by dry heat at 180°C.

Next, each of these fabrics was dyed using a jet dyeing machine according to the dyeing recipe shown in Table 2 to obtain products of examples of the present invention.

(Left below) Comparative Example (1) Fibrillated composite fiber which has a cross-sectional view as shown in Figure 2, and whose mu component is nylon 6, whose B component is PET, and which is composed of nylon 8 and PET.
A fibrillated type conjugate fiber with the same fineness of 50 denier/25 filament and consisting of eight 0.17D single filaments after fibrillation was prepared with an ET volume ratio of 1=2.

(2) Fabric Weaving Using the fibrillated composite fibers of the same fineness as described above, fabrics as shown in Table 3 were woven.

(The following is a blank space) (3) Processing of textiles Fibrillation and dyeing were performed in the same manner as in the examples to obtain products of comparative examples.

Next, Table 4 shows the results of comparison with the comparative example regarding the hue and water pressure resistance of the products obtained in the examples of the present invention.

(Margin below) As is clear from Table 4, the hue (L value) of the high-density woven and knitted fabric obtained by the method of the present invention is significantly improved compared to the comparative example of the conventional product, and the water pressure resistance is It is almost the same as the comparative example of the conventional product.

(Effects of the Invention) As detailed above, according to the present invention, a high-density woven or knitted fabric made of ultrafine fibers can be efficiently dyed in a deep color under normal dyeing conditions without adding a coloring agent to the polymer. . Therefore, the accompanying effect of reducing dye and dyeing wastewater treatment costs can also be obtained.

Moreover, because of the different filaments, the water pressure resistance hardly decreases even though the single yarn fineness is thick in some places, making it extremely useful for casual use.

[Brief explanation of the drawing]

FIG. 1 is a cross section of a fibrillated composite fiber of an example of the present invention, and FIG. 2 is a cross section of a fibrillated composite fiber of a comparative example.
This is a cross section of the fiber.

Claims (1)

[Claims] (1) A woven or knitted fabric is formed using fibrillated composite fibers made of polyamide and polyester that yield ultrafine fibers with a single filament fineness of 1 denier or less after fibrillation, then substantially fibrillated, and then dyed. A method for deep dyeing a high-density woven or knitted material, the method comprising using fibrillated composite fibers capable of obtaining ultrafine fibers of different fineness with a single filament fineness of 1 denier or less.