JPH01111070A - Dark color fiber structure and its production - Google Patents

Abstract

PURPOSE: To obtain a fiber structure having rich light resistance and having excellent deep dyeability by forming the coating film of a mixture of mutually incompatible resins each having different solvent solubility on a fiber structure and subsequently dissolving a part of the mixed resin coating film to form depressions and/or depressions and projections in the resin coating films. CONSTITUTION: This deep-dyeable fiber structure is obtained by imparting a mixed resin component comprising mutually incompatible each resins having different solubility in solvents to a natural or synthetic fiber structure, especially a slightly dyeable fiber structure, in an amount of 0.2-10 wt.% owf, thermally treating the treated fiber structure to form the coating film of the resin, and subsequently dissolving a part of the mixed resin component in a solvent to form depressions and/or depressions and projections in the coating film. The mixed resin component comprises, for example, (A) a silicone-based resin as a component having a small solubility in the solvents and (B) a water-soluble or alkali-soluble natural polymer as a component having a large solubility in the solvents in an A/B weight ratio of 95/5 to 10/90. The obtained fiber structure has excellent deep dyeability and excellent fastness such as excellent washing resistance and excellent abrasion resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a deep-colored fiber structure, particularly a deep-colored fiber structure with good durability, and a method for producing the same.

(Prior Art) In the field of synthetic fibers and natural fibers, studies have been carried out on fibers with vivid and deep colors, and improvements have been proposed for the purpose of "crow's wet color development".

Textile Engineering Vo1.22 (No, 5) P860-368 (
As early as Mayll 969) and Japanese Patent Publication No. 46-26887, it has been shown that optical modification can be achieved by making the fiber surface uneven (roughening) to an appropriate degree of roughness, and Japanese Patent Application Publication No. 46-26887 Publication No. 52-99400 proposes a deep-colored fiber having a specific uneven shape. However, since this method etches the fiber surface itself, there are problems such as slow processing speed, decomposition of the dye, decrease in color fastness, and difficulty in controlling the etching state. Furthermore, the refractive index of the fiber surface is either the same as that of the raw material fiber, or increases due to increased density, and there are many practical problems, such as the possibility of producing a bathochromic effect. On the other hand, deep dyeing processing has conventionally been carried out by treating with various dish processing agents that form a low refractive index surface, such as fluorine-based processing agents, silicone-based processing agents, and polyurethane-based processing agents. This method is easy and industrially advantageous because it does not require special equipment, but it is difficult to uniformly adhere the processing agent to the fiber surface, changes in texture and color, and the fastness of the dye. In addition, there are problems in the deep color performance, such as the fact that the antireflection effect due to the low refractive index of the processing agent is insufficient.

In JP-A-55-107512, a method is proposed in which alkali-soluble fine particles (for example, silica fine particles) are mixed with the polyester fiber itself, and after spinning, the particles are eluted with an alkaline solution to form depressions in the fiber. . In this case, since the fine particles are small and uniformly dispersed, dissolution proceeds simultaneously from a large number of very adjacent locations on the fiber surface, resulting in only a large number of minute irregularities and sharp edges. It is impossible to form unevenness. For this reason, the deep coloring effect was not sufficient.

Japanese Patent Publication No. 60-87225 proposes a deep-colored fiber with good durability by filling the concave holes on the fiber surface with a resin having a small refractive index and having a smooth surface. It is difficult to form specific concave holes in the material, and even if concave holes can be formed, the appearance of deep color will be small if the concave holes are filled with resin and the surface is made smooth. Also, when the entire fiber is coated with a resin film, the same drawbacks as mentioned above occur.

JP-A-61-97490 or JP-A-60-22
No. 4878 and other publications propose a method of attaching a silicone resin to polyester fibers and then subjecting them to plasma treatment to impart deep color properties. In this method, the etching speed of the silicone-based finishing agent covering the fiber surface is slow;
Moreover, the etching condition is not good, such as the inability to form clear irregularities, and it is not possible to obtain deep-colored fibers having good deep-colored properties or durability for industrial purposes.

Another problem is that since the surface of the polyester fiber is plasma etched, the etching holes produce only simple and uniform unevenness, and unless there are a considerable number of unevenness, the deep coloring effect is poor. This is presumed to be because the shape of the unevenness, especially its slope, is small, and the top and bottom of the unevenness are relatively gentle.

JP-A-60-17190 proposes forming a resin film on the fiber surface that has a difference in resistance to plasma etching and then performing plasma treatment to form a large number of fine irregularities on the resin surface, which is preferable. As a resin film,
It is made of inorganic fine particles and a resin having excellent compatibility with the fine particles and uniform waveform, or a cationic polyurethane and/or a vinyl polymer-modified cationic polyurethane having a refractive index of 1.5 or less. Since the irregularities on the resin surface of this proposal are small in size and large in number, there are still problems similar to those described above.

JP-A No. 60-59171 proposes a method for obtaining deep-colored fibers by coating fibers with a treatment agent containing silicone resin and inorganic fine particles, and then plasma-treating the fibers.
Here, too, there are problems such as slow etching speed, etching spots due to uneven adhesion of fine particles adhering to the surface, and changes in performance due to dropping of fine particles.

(Problems to be Solved by the Invention) The object of the present invention is to provide industrially advantageous and low-cost materials with excellent durability and deep color properties of a level not previously available. The present invention provides a fiber structure and a method for manufacturing the same.

(Means for solving the problem) That is, the present invention provides a fiber structure having a mixed resin film made of two or more resins, in which (a) the mixed resins are mutually incompatible and solvent-soluble. (b) A colored, deep-colored fibrous structure comprising different resin components and characterized by (b) having pores and/or irregularities on at least a portion of the surface of the coating.

In addition, the method for producing a deep-colored fiber structure of the present invention involves forming a mixed resin film on the fibers, which is composed of two or more resins that are incompatible with each other and having different solvent solubility, and then applying the mixed resin in a solvent. It is characterized by dissolving a part of the resin film to form concave pores and/or irregularities in the resin film.

In the present invention, the fiber structure is not particularly limited in material, and includes natural fibers such as cotton, wool, and silk, synthetic fibers such as hollyester, nylon, acrylic, rayon, and acetate, and blends thereof. , mixed fibers, etc., are particularly effective in improving fiber materials that have poor color development properties, have smooth fiber surfaces, and have a high refractive index and high surface reflection. In addition, fiber forms include filament,
Sliver, woven or knitted fabrics, nonwoven fabrics, flocked fabrics, raised fabrics, etc. are not particularly limited, but it is easy to apply to flat objects such as woven or knitted fabrics or nonwoven fabrics.

Coloring refers to uniform coloring of the entire surface or patterned partial coloring, such as printing, and is colored before the formation of the resin film or after the formation of concave holes and/or irregularities.

In the present invention, the fiber surface has a coating of two or more mixed resins that are incompatible and have different solvent solubility;
Or it is necessary to form.

Although more than two types of mixed resins may be used as long as it does not contradict the purpose of the present invention, here, for the sake of clarity, the case of two types of resins A and B will be considered. Although resins A and B are incompatible with each other, they have good miscibility and are more preferably resin A.
and B have good transparency, uniformity, strength, and durability, and the refractive index of the resin with low solvent solubility and low dissolution rate is lower than that of the fibers or resin B.

Resins A and B are miscible but incompatible. This means that when A and B are mixed, a good mixture is formed, but a uniform phase is not formed and the phases separate into human phase and B phase. Say something that occurs.

If the miscibility is not good, gelation, thickening, or precipitation will occur, and a good mixed resin of A and B cannot be formed, and a good film cannot be formed. Furthermore, it is difficult to produce good deep-colored fibers industrially. In addition, being incompatible means that even if the two resins A and B are sufficiently mixed, they will not be integrated.
Due to phase separation, this can be observed using an electron microscope or an optical microscope. Generally speaking, when A and B are mixed,
When the mixing ratios are extremely different, the one with a large mixing ratio becomes a continuous phase (sea component), and the one with a small mixing ratio becomes a discontinuous phase (island component). If there is no incompatibility (if they are compatible), A and B will not only be homogeneous on the molecular order and lose each other's characteristics, but also lack heat resistance, physical properties, and chemical stability, resulting in the bathochromic effect. I can't expect much either.

Different solvent solubility means, for example, that when immersed in or in contact with water, an alkaline solution, an acidic solution, or a solvent, they are incompatible and the extent to which they are dissolved and removed by each independent resin phase is different. Holes and/or irregularities are formed on the fiber surface. There are preferable combinations of mixed resins depending on the solvent used, but the residual component that is not removed (hereinafter referred to as resin A) should have good transparency, film-forming properties, excellent physical performance, and a low refractive index. are preferable, and for example, various fluororesins, partially fluorinated resins, various silicone resins, etc. can be considered.

Silicone resins are not particularly limited as long as they have a basic skeletal structure with good film-forming properties and transparency, but silicone resins have good water dispersibility due to convenience in use and film-forming properties on fibers, etc. is preferred. The basic skeleton structure is as described above, but it contains amino groups, hydroxyl groups, epoxy groups, alkoxyl groups, silanol groups, carboxyl groups, etc. in side chains or terminals to improve water dispersibility, film forming properties, and film strength. A modifying group may be introduced. The higher the degree of modification by these modifying groups, the better the adhesion to fibers, film formation, film strength, etc. Molecular weight of silicone resin per unit)
is at most 1oooooo, preferably 50,000 or less, more preferably 10,000 or less.

The molecular weight of A is not particularly limited, but it is usually 5000 or more based on water dispersibility, adhesion to fibers, film strength, durability, etc.
Preferably it is 10,000 or more, more preferably 30,000 or more.

If the molecular weight is less than 5,000, the adhesion properties to fibers, the durability of the film, and the incompatibility with other resins tend to be somewhat reduced.

The form of the side chain of A affects the refractive index, transparency, strength of the film, etc., and as the molecular weight of the side chain increases, the refractive index also increases, which is not preferable. Therefore, the side chain of A is 01-012
A lower alkyl group with a C1
~C6, but may contain benzene rings, unsaturated bonds, amino groups, epoxy groups, hydroxyl groups, alkoxyl groups, etc. to improve heat resistance and film forming properties.

Furthermore, silicone resins that can be crosslinked by catalysts, heat, light, etc. to achieve chemical stabilization and improved physical strength are more preferred in terms of durability during dissolution treatment and abrasion resistance during use. For example, active hydrogen groups, hydroxyl groups, alkoxy groups,
Diorganosilicones having epoxy groups, amino groups, carboxyl groups, alcohol groups, etc., or those having vinyl groups, unsaturated bonds, etc. at the molecular ends (hereinafter referred to as modified silicones) can be easily crosslinked by heating and chemically bonded.

Forms a physically stable silicone resin film. In addition, by using a crosslinking agent such as aminoalkoxysilane, vinylalkoxysilane, or epoxyalkoxysilane in combination with the modified relicon, it can be chemically cured by heating.

It is preferable to form a physically more stable silicone resin film.

On the other hand, the resin components to be dissolved and removed (hereinafter referred to as resin B) include, for example, highly water-soluble natural polymers such as starch, starch, dextrin, gelatin, peptides, proteins, polysaccharides, and polyamino acids, polyethylene oxide,
Water-soluble polymers such as polyethylene glycol, polyacrylic acid, polyacrylamide, carboxymethyl cellulose, hydroxyethyl cellulose, methyl cellulose, hydroxypropyl methyl cellulose, methyl polyacrylate, ethyl polyacrylate, isopropyl polyacrylate, polyformic acid Organic solvent-soluble synthetic polymers such as vinyl, polyvinyl acetate, trinitrocellulose, polystyrene, polyvinyl chloride, styrene-butadiene copolymer, and acrylonitrile-butadiene copolymer can be used.

The method of applying the mixed resin to a colored fabric made of natural fibers or synthetic fibers is the immersion adsorption method, that is, impregnation with a resin dispersion, squeezing, and then drying, or after drying, dry heat treatment, warm heat treatment, or high temperature moist heat treatment. Although conventionally known methods can be used, such as a coating method, that is, applying a coating with a resin liquid using a gravure coater or the like and then performing the above-mentioned heat treatment, the immersion adsorption method is preferred. In order to form a uniform film of the mixed resin on the fiber surface in the immersion adsorption method, the resin concentration in the dispersion of the mixed resin is usually 15% or less, preferably 10% or less, and more preferably 0.
．． Set it to 1 to 7π. In addition, in order to improve the stability of the mixed state of the resin in the dispersion and the dispersion stability, a surfactant such as a commonly used cationic surfactant, nonionic surfactant or anionic surfactant may be mixed. 50% of resin amount
Below, preferably about 20% or less may be added.

The amount of resin attached to the fibers can be controlled by the resin concentration in the dispersion, the rate of adhesion of the dispersion to the fibers, the number of times the resin is attached, etc. The amount of the mixed resin attached to the fiber surface is usually 15% or less, preferably 0.2 to 10%, and more preferably 0.3 to 5%.

If the amount of adhesion is less than 0.1%, the desired deep coloring effect cannot be obtained, which is not preferable. On the other hand, if it exceeds 15%, not only will the texture of the treated cloth become rough and hard, but it will also become a hindrance to other processing treatments.

The film of the mixed resin of resins A and B is at most 1 per fiber weight.
A coverage of 5% by weight is preferred. Preferably 0.2-10
% by weight, more preferably 0.3-7% by weight, particularly preferably 0.5-5% by weight.

If it exceeds 15% by weight, the mixed resin film will not adhere uniformly and problems such as change in texture, decrease in moisture permeability, air permeability, etc., and dull color due to the thickness of the resin layer will likely occur. On the other hand, if it is less than 0.2 weight, the resin film is too thin, resulting in a deep color effect and a decrease in durability, which is not preferable.

The ratio A/B (weight ratio) of A and B in the mixed resin may be any value as long as it has good miscibility and shows incompatibility, but
Preferably 9515 to 10/90, more preferably 90
/10 to 25/75, particularly preferably 80/20 to 50
It is 150. If A is more than 95% by weight and B is less than 5% by weight, it is not preferable because the above-mentioned problems as a silicone-based processing agent cannot be sufficiently improved or durability is imparted, and if A is less than 10% by weight. If B exceeds 90% by weight, A that should remain when the B component is dissolved and removed
Components are less likely to remain. Moreover, even if it remains, the resulting unevenness is substantially convex, resulting in unfavorable bathochromic properties and durability.

That is, it is important to specify the solubility, the difference in dissolution rate, the mixing ratio, and the amount of adhesion between the mixed resins A and B in order to most effectively express the deep color effect. Although the reason for this is not clear, it is thought to be as follows.

Due to their incompatibility, the mixed resins A and B form a phase-separated structure with each other even on the fiber surface. The magnitude of phase separation, i.e. A,
The shape and size of the region of component B affect the physical properties of resins A and B and their mixing ratio.

Although it is difficult to generalize, those with a large mixing ratio become sea components and tend to exist as a continuous phase, and those with a small mixing ratio become island components and tend to exist as a discontinuous phase.

That is, if A/B = about 9/1 to 8/2, the B component tends to exist as an island component, and if B/A = about 9/1 to 8/2, the A component tends to exist as an island component. Cheap. Also A/B
= 7/8 to 3/7, smaller amounts of components tend to become island components, but there are cases where the sea/island is not clearly defined from each other and takes a complicated shape. As mentioned above, 90/1
The fact that the bathochromic effect is the largest in the range 0 to 80/70 is due to the form of phase separation, that is, the shape of the concave pores generated by dissolution and removal with a solvent is not small and relatively continuous, and has a complex shape. seems to be effective in expressing bathochromic color.

However, as mentioned above, these are also greatly influenced by the physical properties of the A and B components.

The mixed resin film on the fiber surface has pores or irregularities, which are one of the factors for the development of deep color. The shape of the unevenness is literally uneven, but preferably it is a substantial depression where the surface of the mixed resin is partially depressed, and more preferably, the phase-separated resin A, for example, a region other than silicone resin, is preferentially formed. Dissolved/eluted concave pores are better. By forming such concave holes, a product with excellent deep coloring effect, abrasion resistance, washing resistance, and dry cleaning resistance can be obtained. The shape, size, and number of the recesses of the present invention are not particularly limited, but for example, the size, expressed in terms of the area occupied by the recesses, is usually 50% or less per unit area, preferably 5 to 40, and Preferably it is 7 to 30%. Regarding the number, it is usually 30 or less per 1μ2, preferably 25
The number is preferably 1 to 20, more preferably 1 to 20. If the area of the recesses exceeds 50%, not only will the effect against deep coloring not increase, but also the abrasion resistance, gloss, etc. will deteriorate, which is not preferable. The number of holes is usually 30 holes/μ2 or less, although it is influenced by the area occupied by the holes, the size of the holes, etc. If it exceeds 30 holes/μ2, the recesses become smaller or the distance between the recesses becomes smaller, resulting in poor wear resistance and
This is disadvantageous in terms of reduced gloss, etc. Incidentally, the size and number of unevenness on the fiber surface can be measured by electron microscopic observation. The more acute the angle between the edges of the unevenness or recesses formed on the fiber surface and the concave portion and the fiber surface, the more effective it is in terms of deepening the color.

The unevenness described in conventional literature (for example, Fig. 1 of JP-A-55-107512) is such that the angles formed between the concave portions and the convex portions with the fiber surface are not acute, and the peaks and valleys of the unevenness are gentle. Therefore, the deep coloring effect was not sufficient.

The formation of irregularities on the mixed resin film is possible by dissolving and removing one component by washing out one component due to the difference in solvent solubility between resins A and B. As resin B, especially hot water,
Those that can be easily dissolved and removed with water, alkaline solution, acidic solution, alcohol, alcohol aqueous solution, etc. are preferred. In the conventional method of forming concave holes or irregularities by dissolving and removing, water-soluble or solvent-soluble salts or low-molecular compounds are added to the polymer and then dissolved and removed after spinning.
With this method, only wide and gentle entrances to the recesses or irregularities can be obtained. This is due to the existence form of the salts or low molecular weight compounds in the fibers, and the fact that sufficient pores or irregularities cannot be formed by dissolving only the salts or low molecular weight compounds during dissolution, and only a portion of the polymer is dissolved. In contrast, the present invention is a mixed film made of at least two or more resins that are incompatible with each other, and one domain that is phase-separated in the film has an acute angle to the other domain. Moreover, each domain is easily separated due to phase separation. Therefore, in the present invention, the recesses or irregularities formed after dissolving and removing one component have sharp edges.

The method of dissolving and removing at least one component (resin B) of the mixed resin utilizes the solubility and the difference in solubility between at least two components constituting the mixed resin, preferably by dissolving in a manner that leaves a resin component with a small refractive index. Process. It is also preferable to heat the melt, apply ultrasonic vibration, or add mechanical fir. For example, if one resin is a silicone resin and the other is a water-soluble resin such as polyethylene glycol, polyvinyl alcohol, methoxycellulose, or starch, ordinary washing with water will be sufficient to dissolve and remove the resin components other than the silicone resin. , there is formation of concave pores on the surface of the film where the water-soluble resin component has been removed. When one resin is perfluoroalkyl acrylate and the other is polyvinyl acetate, polyethyl vinyl ether, polyvinyl pyridine, polyvinyl alcohol, etc., the other component can be dissolved and removed with methanol, forming pores.

The greater the incompatibility of each component, the more concavities and/or irregularities formed due to differences in solubility and dissolution rate in solvents.
Each component region is free from contamination with other components and can be formed more clearly.

The solvent should be a good solvent for at least one component, a poor solvent for at least another component, preferably a non-solvent and not swellable.

- After dissolving and removing the component resin, solvent cleaning, scouring, and drying are performed, and if necessary, hydrophilic processing, water-repellent processing, wrinkle-proofing processing, antistatic processing, etc. are performed.

The ratio of solubility and dissolution rate between A and B is usually 2 times or more, preferably 10 times or more. Due to this, the FIB inside the film
Dissolution proceeds preferentially for the components. More preferably, the treatment is performed with a solvent that does not dissolve A but only B.

That is, components A and B phase separate, and the solubility and dissolution rate are A.
Since B is smaller, pores are formed in which B is dissolved and removed in a short time, and minute irregularities, preferably concave pores, are formed. In this way, by forming irregularities and/or concave holes, preferably substantially concave holes, in the film, a deep-colored fiber can be obtained which efficiently develops deep coloring and has excellent durability.

For example, when comparing the affinity of mixed resins A and B to polyester synthetic fibers, if the affinity of B is set to be greater than that of A (for example, if A is silicone-based resin, B is
The ratio of B in the phase-separated mixed resin film is large near the polyester fibers and small near the surface of the resin film. Conversely, the ratio of A is large near the resin surface and small near the fiber surface. Therefore, with such a combination of mixed resins, concave holes are substantially formed, resulting in extremely good bathochromic properties.

That is, the recessed hole of the present invention has an acute edge and often exhibits a shape in which the depth of the hole widens rather than the entrance of the hole. Formation of such a recessed hole has not been previously proposed, and was discovered for the first time in the present invention. Since the entrance of the recessed hole is small and the depth is wide, it is extremely difficult for the light that reaches the recessed hole to be reflected and go outside, and most of the incident light enters the inside of the fiber.

On the other hand, since the concavities and convexities that have been proposed in the past are repeated concavities and convexities at a certain angle, just like a screw thread, most of the light that enters the concavities is reflected as is, and no matter how many concavities and convexities are made on the surface, The coloring effect was not sufficient (for example, see FIG. 1 of JP-A-55-IQ7512).

(Effects of the Invention) Surprisingly, the deep-colored fiber of the present invention has far better deep color properties than those conventionally proposed, and has good fastness such as washing resistance and abrasion resistance. . Furthermore, because it has a remarkable deep color or deep color effect, the amount of dye used can be reduced compared to conventional methods, and it is superior in quality and cost, with no fading or color migration.

The deep-colored fiber of the present invention can be applied not only to applications where blackness is essential, such as black formal wear and school uniforms, but also to a variety of textile products such as colored formal wear and prints, and is therefore extremely useful.

Further, according to the method of the present invention, it is possible to make deep-colored fibers with excellent durability with a small amount of adhesion of the mixed resin and to effectively roughen the surface of the fibers, so that the fibers are extremely useful industrially.

(Example) Hereinafter, the present invention will be explained in more detail with reference to Examples.

Note that the evaluation in the present invention was performed by the following method.

A. Evaluation of bathochromism Bathochromism (depth of color) is determined by CI E 1976 (Lab
) method, measure the reflectance with a color analyzer and
The value was determined and the L value was obtained from the following formula. The smaller the L value, the
This indicates a high level of deep coloring.

L=25 (100Y/Yo)" -16 Also, ΔL is the L-value (Ll) after resin film formation and L after dissolution treatment
- value (L2), and the larger ΔL is, the greater the bathochromic effect is expressed.

Evaluation of incompatibility The resin mixture was formed on a film or a glass plate, and observed using an optical microscope, phase contrast microscope, electron microscope, or fluorescent X-ray analysis.

Example 1 25 to 60 d/48 f polyester filament
0 T/M 8-twist warp and 75 d/72 f
8000 T/M S on polyester filament,
A georgette fabric consisting of twisted weft yarns was blanched using a conventional method, set in dry heat at 180°C, and immersed in a 20% caustic soda aqueous solution at 90°C for 20 minutes.
% weight loss treatment was performed.

This fabric was dyed with Kayalon Polyester Black 08FC (manufactured by Nippon Kayaku ■) 15 (o, w, f,) and then subjected to reduction washing to obtain a black georgette fabric.

Next, amino-modified dimethylsiloxane resin (Mw =
An aqueous dispersion of polyvinyl alcohol (polymerization degree of 500, saponification degree of 88) and an aqueous dispersion of polyvinyl alcohol (polymerization degree of 500, saponification degree of 88) were mixed at the ratio shown in Table 1, and the resin amount was 3% O1W, f.

I attached it so that it looked like this. After drying and heat treating to form a film of the mixed resin, it was immersed in warm water of 50 to 60°C for 30 minutes, stirred, and then dehydrated and dried.

Table 1 shows the results. In the table, the evaluation of the phase separation state is shown. ◎ indicates that each domain of resin A and B clearly forms a phase separation, and ○ indicates that most of the domains form phase separation, but only some of them are compatible. Δ indicates that the phase-separated resin A or B has a small interface and is difficult to dissolve, and × indicates that no phase separation is formed and no concave pores and/or irregularities are formed even after dissolution treatment.

(Left below) Example 2 Epoxy-modified silicone (Mw = 200
As resin B, a mixture of 80/20 (weight ratio) of 00, epoxy group equivalent) and γ-glycidoxypropylmethoxysilane, hydroxymethylpropyl cellulose was used. An aqueous dispersion of a mixture of resin A/resin B = 7/3 (weight ratio) was applied to the dyed and washed Zizette fabric of Example 1 to form a film so as to have the resin adhesion amount shown in Table 2. Elution treatment was performed with hot water at ℃. Note that the L value of the fabric before resin attachment was 12.5.

The results are shown in Table 2. In addition, the evaluation of the resin adhesion state is shown◎
○ indicates that a uniform film was formed on the fiber surface, ○ indicates that some adhesion spots were formed, and Δ indicates that there were adhesion spots and some adhesion between the fibers.

(Margin below)

Claims (10)

[Claims] (1) In a fiber structure having a mixed resin film consisting of two or more resins, (a) the mixed resin is mutually incompatible and consists of resin components with different solvent solubility, and (b) the film surface 1. A colored, deep-colored fiber structure characterized by having recesses and/or irregularities in at least a portion of the structure. (2) The fibrous structure according to claim 1, wherein the component with low solvent solubility is a silicone resin. (3) The fibrous structure according to claim 1, wherein the major solvent-soluble component is water-soluble or alkali-soluble. (4) The fibrous structure according to claim 1, wherein the mixed resin film is phase-separated into two or more independent phases. (5) The fiber structure according to claim 1, wherein the mixed resin coating is at most 15% by weight based on the weight of the fibers. (6) Form a mixed resin film on the fibers consisting of two or more resins that are mutually incompatible and have different solvent solubility, and then dissolve a portion of the mixed resin with a solvent to create dents in the resin film. A method for producing a colored deep-colored fiber structure characterized by forming holes and/or irregularities. (7) The method according to claim 6, in which an aqueous dispersion of the mixed resin is applied to form the mixed resin film. (8) The method according to claim 6, wherein the highly soluble resin phase of the mixed resin film is preferentially dissolved and removed using water or an alkaline solution to substantially form concave pores. (9) The method according to claim 6, wherein the highly soluble resin phase of the mixed resin film is preferentially dissolved and removed using alcohol or a water/alcohol mixed solution to substantially form concave pores. (10) The method according to claim 6, wherein the amount removed by dissolution is at least 0.1% by weight based on the weight of the fiber.