JPS6022096B2 - dyed cloth - Google Patents

Description

[Detailed description of the invention]

The present invention relates to dyed fabrics with deep color and brightness. More specifically, the present invention particularly relates to a dyed fabric using a false-twisted two-layer structured yarn made of filaments having micro groups or micro craters, which always has a deep hue. The chemical and physical characteristics of synthetic fibers, especially polyester fibers, are too numerous to list, and they are widely used in both clothing and non-clothing fields. However, when it comes to polyester, there are still problems with its dyeability, and the results are still satisfactory compared to natural fibers such as wool and silk in terms of the depth and clarity of the color of dyed fabrics. The reality is that this is not the case. Of course, up until now, various attempts have been made to improve the dyeability of polyester; for example, methods of introducing metal sulfonate groups into polyester;
A method of blending a third component into polyester, a method of further subjecting the stretched polyester fiber to a relaxing heat treatment, etc. have been proposed. However, even these political polyester fibers have relatively improved dyeability compared to the original polyester, and they cannot match the demands of formal wear and school uniforms, which are particularly demanding these days. be. In the case of these dark-colored cloths, it is a daily experience that the surface of the beam cloth looks visually pale.
Unless this phenomenon is solved, it is impossible to expect a product that is truly rich in deep color and vividness. For the purpose of the present invention, the dyed fabric does not look white and brown, and as a result, it is suitable for formal wear,
It is an object of the present invention to provide a dyed cloth rich in deep color and vividness, which can be sufficiently applied in the field of school uniforms. In the process of conducting various studies to achieve the above object, the inventors of the present invention confirmed that the demands for deep color and sharpness could not be adequately met by means such as modifying the dye surface or yarn. As a result of further investigation, taking into account not only the aggregate form of the dyed material but also the surface shape of the constituent fibers, surprisingly, in some types of composite processed yarns, the white-browning phenomenon disappeared and these The present invention was achieved by discovering that there is a very unique behavior between dye absorption and bathochromic properties in processed yarns. Thus, according to the present invention, one of the two or more types of polyester filament yarns is used as a core yarn, and the other yarn having micro groups or microcraters on the surface of the constituent filaments is arranged around it to create a directional property between the constituent filaments. A woven or knitted fabric using false-twisted two-layer structure yarn wound into an alternating yarn shape without any
The woven or knitted fabric is dyed to an L value of 15 or less, thereby providing a dyed fabric characterized by a deep color and sharpness. Furthermore, in this regard, the effect of the present invention is to synergistically utilize the aggregate structure of the threads constituting the cloth band and the dyeing behavior of the structure to obtain a dyed cloth with a deep color and vivid color. First, a yarn having a structure as shown in FIG. 1 is used. The most characteristic feature in FIG. 1 is that the wound yarn 2 has substantially no so-called helical winding portion where the wound yarn 2 is completely wound around the core yarn 1 one or more times. Instead, the winding yarn 2 has no directionality between its constituent filaments 3 and is alternately reversed (in a non-centered state), and the portions in the S and Z twist directions have a winding state of 3600 degrees with respect to the core yarn. is taking. In this case, each filament 3 constituting the wound yarn
If a part of the yarn is arbitrarily intertwined with the core, a high level of connectivity and integrity will be created between the core yarn and the wound yarn even if the winding is incomplete due to continuous alternating reversals. Such textured yarns can be obtained by subjecting at least two yarns, preferably undrawn yarns and partially oriented yarns, which have different elongations, in a mixed weave or entanglement state, to a special drawn false twisting method. can. At this time, it is necessary that the yarn with lower elongation can be drawn and false-twisted, and at the same time, it is also necessary that the elongation difference between this and the yarn to be twisted is 100% or more. Since the interlaced yarn is a mixture of two yarns with different elongation, it is difficult to form a two-layer structure even if it is burned as is. However, this problem can be solved by supplying a yarn that can be drawn and false-twisted to the yarn with lower elongation. In other words, by applying false twisting at the same time as drawing, the yarns with different elongations, which are mixed and integrated through the interlacing process, can become filaments with high tension due to the difference in the elongation characteristics of both yarns in response to the false twisting tension. While the fibers of both groups are separated again into a filament group and a filament group with low tenacity, a portion of the fibers of both groups becomes a yarn partially intertwined in the length direction, which is twisted by a false twisting device. From this point of view, it is necessary that the filament yarn with lower elongation can be drawn and false-twisted at least 1.2 times or more, but when the drawing ratio is 1.4 times or more,
The most favorable results are obtained. Furthermore, in order to obtain the wound two-layer yarn structure at this time, the magnitude of the difference in elongation between the two yarns is relevant, and a difference in elongation that is larger than what is common knowledge is required. That is, in the case of no entanglement, a difference in elongation of about 50% between the two yarns is enough to form a two-layer structure, but in the case of interlacing treatment, a difference in elongation of 100% or more is required. In particular, more favorable results can be obtained if there is a difference in elongation of 150% or more. In this way, by providing a large elongation difference between the two yarns, a two-layer twisted yarn structure can be obtained for the first time in the twisted region, along with the separation of the hot-wet yarn into two layers due to drawing. As a result, by untwisting the twisted yarn, a two-layer yarn with alternate lacquer wrapping is obtained. Incidentally, the more entanglements imparted to the raw yarn, the better; generally, when an entanglement treatment is performed, the entangled portion and the open weaving portion become a repeating unit to constitute an entangled yarn, but in order to optimally implement the present invention, It is preferable to provide such interlacing that the length of the interlaced part is long and the length of the open weave part is short. Further, the number of entanglements is required to be 2/m or more from the point of view of improving the handleability in the post-process. However, with this level of entanglement, only about half of the wound yarns in the processed yarn are structurally similar to those shown in FIG. 1, which tends to sometimes result in a lack of fullness and flexibility. In this sense, a processed yarn that falls within the scope of the present invention can be obtained by setting the number of entanglements to 30 or more, preferably 45 or more. In other words, although the filaments constituting the wound yarn are individually separated, when viewed as an overall structure, a processed yarn with an SZ continuous alternating inversion wrapping structure is obtained, and when this processed yarn is made into a woven or knitted fabric, it has a moderate It has a spun-like, fluffy and flexible texture while having a twisted thread texture. Another requirement for such a two-layered yarn is that micro groups or micro-craters be present on the surface of the constituent filaments of the sheath yarn. As a means for forming micro groups, for example, wrinkle-like micropores arranged in the fiber axis direction are formed by treating a sheath yarn made of polyoxyethylene glycol or polyester containing polyoxyethylene glycol and a sulfonic acid compound with an aqueous alkaline solution. There is a method of forming on the fiber surface. However, since filaments obtained by the above method sometimes show a tendency to fibrillate, a preferred method for preventing this is to use a modified polyester copolymerized with a sulfonic acid compound represented by the following general formula: A mixture with a modified polyester is melt-spun to form a solid fiber, and this is used as a sheath yarn.A two-layer structure yarn is treated with an aqueous solution of an alkali compound to obtain 2 to 5 solid fibers from the fiber.
By removing % by weight of the fiber, the maximum value of the frequency distribution is in the range of 0.1 to 0.3 m in the periphery which is at least 0.5 m from the periphery in the cross section of the fiber. A method is useful in which fine pores having a pore diameter of In this case, the amount of the sulfonic acid compound in the modified polyester may be in the range of 2 to 16 mol% based on the acid component (excluding the sulfonic acid compound) constituting the modified polyester. Further, the amount of the modified polyester to be mixed with the unmodified polyester may be about 0.1 to 10 parts by weight based on 10 parts by weight of the unmodified polyester. Further, in the above formula, Z represents an aromatic group or an aliphatic group, and among them, an aromatic group is preferable. M represents a metal or a hydrogen atom, and among them, an alkali metal is preferable. RI represents an ester-forming functional group, and specific examples include -○(CQchimf○(CH2namna.OH, (
However, R represents a lower alkyl group or a phenyl group, 1 represents an integer of 1 or more, and m represents an integer of 2 or more. ), etc. R2 represents an ester-forming functional group that is the same as or different from RI, n is 0 or 1,
In particular, it is preferably 1. Particularly preferred examples of such sulfonic acid compounds include sodium (or potassium) 3.5-di(carbomethoxy)benzenesulfonate and 1.8-di(carbomethoxy)naphthalene-3.
-Sodium (or potassium) sulfonate, sodium (or potassium) 2.5-bis(hydroxyethoxy)benzenesulfonate, and the like. In order to produce a modified polyester copolymerized with such a sulfonic acid compound, the sulfonic acid compound is copolymerized at any stage before the synthesis of the polyester described above is completed, preferably at any stage before the first stage reaction is completed. All you have to do is add.
On the other hand, to obtain microcraters, the sheath yarn should be
505 hA・sec/Irradiate that plasma,
It can be formed by treating a sheath thread made of polyester containing fine inorganic powder such as zinc oxide or silicate with an aqueous alkali solution to elute the fine inorganic powder. The following can be said to be the characteristics in terms of hue of the composite yarn obtained as described above. ｝ Generally good dyeability. That is, since the sheath component is a partially stretched undrawn yarn, the dyeability is good and the dye exhaustion is greater than that of ordinary drawn yarn. Also, the increased surface area of the fabric due to the multi-layer bulky structure facilitates dye exhaustion. 'o- Optical density is improved. That is, compared to lacquered yarn of flat yarn or normal false twisted yarn, due to the multi-layer bulky structure in which the east-gathering properties of the filament groups of the sheath component are disordered, the amount of incident light emitted from the surface is small and the amount of diffusely reflected light is large. This diffusely reflected light is repeatedly reflected and refracted in a large amount within the multilayer bulky structure, and the optical density is improved because the amount of surface reflected light that is absorbed and visually perceived is reduced. Moreover, such an effect is further accentuated by the micro groups or micro craters present on the surface of the constituent filaments of the sheath yarn. In other words, on the surface of the filament, there is less surface reflected light and more diffusely reflected light on the surface of each single fiber due to micro groups or micro craters (this tendency occurs when the pore diameter is 0.1 to 0.3 m).
It is thought that the reflected light from the filament surface and the inside of the filament east (which is particularly likely to occur in the range of 1 to 2) is reduced in the middle, and the inkstone density is improved. In this sense, in addition to the sheath yarn, there are also micro groups on the surface of the constituent filaments of the core yarn.
Particular preference is given to the presence of microcraters.
However, simply dyeing the processed yarn as described above does not produce the deep color effect aimed at by the present invention, and it is necessary to dye the yarn to an L value of 15 or less. Figure 2 shows the relationship between the dye absorption amount and the L value when fabrics obtained using the above-mentioned false-fired two-layer structure yarn and the false-twisted crimped yarn (low-torque yarn) of the same thickness are dyed. Figure 2A is for plain weave, and Figure 2A is for satin georgette. Moreover, in the figure, the solid line is the case of the present invention, and the dashed-dotted line is the case of the comparative example. Figure 2 A. The characteristic feature of the present invention is that it cannot be said to be a deep color in the light-medium color area compared to the conventional one, and it is clearly inferior in terms of L value, but the L value is 15. When near a hill, the L value, that is, the brightness of the two is reversed, and the difference becomes large. Therefore, when dyeing cloth using the false-twisted two-layer structure yarn having the structure described above so that the L value is 15 or less, it exhibits deep color (no whitish-browning phenomenon) and clarity that surpasses conventional dyeing. The result is a dyed cloth that is dyed. The definitions of processed yarn, fabric design conditions, dyeing conditions, and L value used in the above example are as follows. [1] Production of false-twisted two-layer structured yarn (i) Intrinsic viscosity 0.4 obtained by copolymerizing 5.0 mol% of sodium 3.5-di(carbomethoxy)penzelsulfonate with terephthalic acid of the present invention A polyester filament yarn with an elongation release of 5% ( A friction type temporary lacquer machine Stretching and false twisting was performed using an interlace nozzle with an overfeed rate of 25.
%, a compressed air pressure of 4k9/m and 6 hardness/m entanglement was applied, and then a stretching ratio of 1.5 was applied, a heater temperature of 18 pm, a surface speed of the friction temporary combustion device of 70 pm/m, and a second Delivery. -ra speed 35 m/rib, K value (scale twisting tension/twisting tension) 0
．． Stretching and false twisting were performed under the conditions of 75. In addition, after scouring the gray fabric made of composite yarn obtained in this way, the NaOH concentration was 3.5.
The entire sample was treated with boiling water for 60 minutes to reduce the weight by 15% (weight percent) to obtain a microgroup surface. The maximum value of the frequency distribution of pore diameters in this case was 0.26. (ii) False twisted crimped yarn (low torque type)...
・Conventional polyester filament yarn (15Me/nl
) to process. Processing conditions Number of twists...2500T/m
1st heater temperature: 205℃ 2nd heater temperature: 220℃ [D]
Fabric design (common) (i) Plain woven fabric (ii) Satin georgette [m] Dyeing conditions (common) '11 Plain woven fabric - After scouring, heat setting, and alkaline reduction using the usual methods, dyeing and reduction under the following conditions Cleaning was carried out. {21 Satin Georgette: After carrying out grain reduction, heat setting, and alkali reduction in the usual manner, dyeing and reduction cleaning were carried out under the following conditions. Staining ′ (x=1, 3, 5, 10, 15, 20) Reduction washing [W] L value Color sense has three attributes: hue (hue), brightness (brightness), and saturation (saturation). The L value corresponds to the lightness of these three attributes, and is used to distinguish between bright colors and dark colors, as well as chromatic colors and achromatic colors (
Suitable for both white and black). The L value is displayed in a range from 0 (lowest brightness) to 100 (highest brightness), and the smaller the value, the darker the color. Note that the L value can be directly read with a color difference meter, but in the present invention, the L value is
The L value was measured using a type ND-101DC color difference meter manufactured by Co., Ltd. As can be seen from the above explanation, the deep color effect obtained in the present invention is due to the synergistic effect of the sheath yarn form of the false-twisted two-layer yarn, which is the raw material, the aggregate form of the two-layer yarn, and the dyeing conditions. It is played by In this sense, the one shown in Figure 1 is a typical example of a false-twisted two-layer structured yarn, but the point is that the sheath component is not densely concentrated as a whole yarn, but is wound directionally by filaments. It only needs to be tight and have a relatively high porosity. On the contrary, even with the same false-twisted two-layer structure yarn, for example, the sheath component is concentrated as a whole and wound in a tight state (a typical processing method is described in Samurai Ko No. 45-128018). ) is not used in the present invention because it does not have the same effect as the above-mentioned a and g. By the way, some of these bathochromically dyed fabrics have optically extremely reduced surface reflected light, but if the surface reflected light can be further suppressed, the most desirable product can be obtained. As a method of reducing the amount of surface reflected light, it is advantageous to apply a substance having a lower refractive index than the object constituting the substrate to the surface of the object substrate. An example of this is lens coating technology, which reduces the amount of surface-reflected light by coating (wetting) the lens surface with a transparent thin film that has a lower refractive index than glass. The above-mentioned phenomenon of increased bathochromicity due to wetting is also the result of a reduction in the amount of surface reflected light by covering the surface with a thin film of water, which has a refractive index of 4.0 mm compared to the substrate. A method for attaching silicone to the surface of dyed cloth according to the present invention by applying such a principle (Tokukan Sho 48-136
No. 95), a method of forming a polymer thin film having a refractive index lower than that of the constituent fibers on the surface of the fiber structure by plasma polymerization or discharge grafting (Hinseki No. 53-111192) may be applied. However, commercially, these methods have problems in terms of processing efficiency, so it is advantageous to preferably employ the following Yunaka processing method. (i) A method in which a dyed cloth is immersed in a treatment agent bath in which a hydrophobic polymer containing an electrolytic substance and having a refractive index lower than that of the fiber is emulsified or dispersed to perform an in-bath treatment. (ii) A cationic compound is attached to the dyed polyester fabric during reduction cleaning or a subsequent process, and then the dyed fabric is treated with a hydrophobic polymer having a lower refractive index than the polyester fiber. A method in which the hydrophobic polymer is emulsified or dispersed and immersed in a treatment agent bath to which an electrolyte is added if necessary to perform a Yunaka treatment.Compared to the pudding method, these treatment methods generally spread the hydrophobic polymer uniformly over the fiber surface. Examples of hydrophobic polymers with a low refractive index include polytetrafluoroethylene, tetrafluoroethylene-propylene copolymer, and butrafluoroethylene-hexafluoropropylene. copolymers, tetrafluoroethylene-ethylene copolymers, tetrafluoroethylene-tetrafluoropropylene copolymers, polyfluorovinylidene, polybentadecafluorooctyl acrylate, polyfluoroethyl acrylate, polytrifluoroethyl metal acrylate, polytrifluoroethyl methacrylate, etc. Examples include fluorine-containing polymers, silicon-containing compounds such as polydimethylsilane, polymethylhydrodiene siloxane, and polydimethylsiloxane, and acrylic acid esters such as ethylene-vinyl acetate copolymers, polyethyl acrylate, and polyethyl metal acrylate. An agent with a refractive index smaller than that of the polyester fiber structure may be selected and used as appropriate.As an emulsifying or dispersing agent for emulsifying or dispersing these hydrophobic polymers, an acid and/or anionic activator may be used. Examples of acids include hydrochloric acid, sulfuric acid, formic acid, phosphoric acid, aliphatic carboxylic acid, aliphatic sulfonic acid, alkylbenzene sulfonic acid, alkylnaphthalene sulfonic acid, halogen-substituted aliphatic carboxylic acid, and polyoxyethylene alkyl. Organic and inorganic acids such as ether sulfate esters can be mentioned, and anionic activators include higher fatty acid salts, higher alcohol sulfate ester salts, alkyl sulfonates, alkylaryl sulfonates, and formalin condensed naphthalene sulfonates. , perfluoroalkylcarponate, perfluoroalkylsulfonate, perfluoroalkylphosphate ester, etc.These emulsifying or dispersing agents may be added during the polymerization process of the hydrophobic polymer. Alternatively, it may be added when the hydrophobic polymer is emulsified or dispersed in water.The electrolytic substances that may be added as necessary to the above emulsion or dispersion include common salt, sodium sulfate, potassium sulfate,
Examples include sodium hydrogen sulfate, potassium hydrogen sulfate, ammonium sulfate, ammonium chloride, sodium nitrate, potassium nitrate, ammonium acetate, sodium acetate, and organic and inorganic acids, among which inorganic salts are preferred.
In particular, when potassium hydrogen sulfate is used, a large bathochromic effect can be obtained and favorable results can be obtained. The treatment agent bath used in the present invention can be made apparently completely stable by combining an appropriate emulsifying or dispersing agent with an electrolytic substance. It is desirable to worship the rope constantly. For this purpose, it is suitable to use a jet dyeing machine or the like, for example, for fiber structures in the shape of a cloth. Although the processing temperature may be any temperature, a temperature of 50 to 90 o'clock is suitable for shortening the processing time and preventing dyeing of the dyed fiber structure, and a treatment time of 1 to 30 minutes is sufficient. The polymer concentration in the treatment bath is usually 0.01 to 5% as a dispersion solution and the electrolyte concentration as a solution concentration of 0.01 to 5%. Examples of cationic compounds include the following. (X=CI, Br, CH3SQ, NQ, CI04, R:
alkyl group having 1 to 22 carbon atoms) (X=CI, Br, CH
3S04,N03CI02,R: Alkiki group having 1 to 22 carbon atoms) (x=CI, Br, CH3SQ, NQCI02
, R: alkyl group having 1 to 22 carbon atoms) polyamine resin
- [41 For example, polyethylene glycol polyamine synthesized from polyethylene glycol dihalide and a lower alkylamine or polyamine, and polyethylene glycol epichlorohydrin-polyamine obtained by reacting a polyamine with a product obtained by reacting epichlorohydrin with polyethylene glycol. Examples include, but are not limited to, condensates. Acrylic acid permeable conductor For example, polydiethylaminoethyl methacrylate dimethyl sulfate 4
Examples include, but are not limited to, class compounds (structures shown below). (n is an integer greater than or equal to 1) Among these compounds, compounds with legs from '11 to '11 are particularly effective during reduction cleaning, and also [1]
It is appropriate that the compound of ~[51] be attached or adsorbed to the fibers in the form of an aqueous solution or emulsion in the subsequent steps, and in this case, it is added to the liquid at a ratio of 1 g/1 to 100 g/ml. In terms of the amount attached to the fibers, it is generally sufficient that the amount is in the range of 0.001 to 5% by weight. Although it is not yet clear why such processing can produce a more excellent deep color effect, the following reasons can be considered. In other words, the dispersion stability of hydrophobic particles emulsified and dispersed with an anionic activator is determined by the electrical repulsion formed around the particles,
Although a stable dispersion state is maintained due to mutual potential energy such as van der Waals attraction, the presence of cationic compounds on the fiber surface or the addition of electrolytic substances to the bath The balance is disrupted near the fiber surface, the dispersion stability of hydrophobic particles is greatly reduced, and they become selectively and easily adsorbed on the surface of hydrophobic objects such as synthetic fibers. The polymer adheres uniformly to each fiber,
Since it is not selectively adsorbed to the fibers, it is presumed that the texture does not harden. As described above, the present invention skillfully utilizes the aggregate structure of woven and knitted materials and its dyeing behavior to provide deep-colored and brightly dyed fabrics, and the material itself has a texture of false-twisted two-layer yarn. By combining the features and features, you can obtain products with unprecedented high added value. Example 1 [1] Production of false-twisted two-layer structured yarn 3. Modified polyester (polyethylene terephthalate) chips (intrinsic viscosity 0 .45) Polyester filament yarn with an elongation of 345% (11 pine e/24 ms) and a polyester filament yarn with an elongation of 115% (15 ratio/4 warp ls) obtained from paper yarn at a speed of 320 h/fence, and were subjected to intertwining treatment and stretching pre-combustion processing. Ta. Interlaced nozzle allows overfeed rate of 2.
5%, air pressure 3.5k9, giving 54 pieces/m cross length, then stretching magnification 1.5 stitches, heater temperature 180
℃, surface speed of friction false twisting device 63 m/skin, second delivery roller speed 35 m/side, K value (combustion tension/twisting tension)
Stretching and false twisting were performed under the condition of 0.75. The resulting processed yarn has a winding part as shown in Figure 1 with an average length of 8 wires, and a winding part where there are gaps between the filaments but is loosely concentrated as a whole, with an average length of 2 wires. It had ribs.

[0] Fabric production Weaving under the following conditions (i) Plain weave (ii) Satin Georgette [m] Alkali treatment of gray fabric NaOH concentration 3.5% Solution weight loss rate 15% (weight percent) [N] Dyeing Below (i) Plain woven fabric After scouring, heat setting, and alkali weight reduction in the usual manner, dyeing and reduction washing were carried out under the following conditions. '2' Satin Georgette After grain raising, heat setting, and alkali weight loss were carried out in the usual manner, dyeing and reduction washing were carried out under the following conditions. Staining (x=1, 3, 5, 10, 1520) Reduction washing [V] Results are shown in Table 1. Table 1 * Comparative Examples (The same applies to the following examples) The numbers in parentheses in the L value section of the above table are for the false twisted crimped yarn. As is clear from these results, although there is a noteworthy fact that the fabric used in the present invention is inferior to conventional fabrics in dyeing density in the light to medium color range, when the L value becomes 15 or less, The above-mentioned tendency is reversed, and no discolored areas are observed, resulting in a deep and clear dyed fabric. Example 2 In Example 1, SmmikaronNa was used as the dye.
Table 2 shows the results of a similar experiment except that nyBI female S-nex L (manufactured by Sumitomo Chemical Co., Ltd.) was used. Table 2 Example 3 M. of Example 1 2 and M. During reduction cleaning of the satin-dyed georgette cloth in step 4, a cationic treatment agent is made to coexist with the following method, and the treatment agent is attached to the fibers, followed by treatment with a hydrophobic polymer having a refractive index lower than that of the fibers. I did it. [A] Preparation of emulsions of hydrophobic polymers 20 g of deionized water, 1.1 g of ammonium persulfate in a 40% stainless steel autoclave under a protective atmosphere of nitrogen
, sodium pyrophosphate3. Add 0.25 g of sodium bisulfite and 0.1 g of perfluoro n-octanoic ammonium acid as an emulsifier, close the container, cool with dry ice and noacetone, vacuum to 1 skin Hg, and add 4 g of tetrafluoroethylene. , and propylene were introduced, and the temperature of the container was raised to 80° C. while shaking, and polymerization was carried out for 8 hours. The reaction was then stopped and cooled to room temperature to obtain an extremely stable emulsion of tetrafluoroethylene-propylene copolymer with a dry solid content of 20%.

[0] Reduction cleaning of dyed products and processing power with emulsion of [A] Seisoda 1
7 in an aqueous solution containing 1 g/1, hydrosulfite, and trimethylbenzylammonium chloride 1/1.
The bathochromic degree (K/S measurement wavelength 50
A water-washed black dyed cloth with a weight of 0 Am) 16.5 was obtained. Subsequently, without drying this black dyed fabric, the above black dyed fabric was placed in a processing agent bath consisting of [A] tetrafluoroethylene-propylene copolymer emulsion solid content 0.5% oM and potassium hydrogen sulfate 1 g/1. Using the same jet dyeing machine that was used for dyeing, the material was treated in a hot water bath at 80°C for 20 minutes, dehydrated, and dried. The L value of the dyed fabric thus obtained is shown in Table 3, and the deep color and clarity are further improved, making it ideal for formal wear and the like. Table 3

[Brief explanation of the drawing]

Figure 1 shows one of the yarns used as the material for the dyed cloth of the present invention.
FIG. 2, a side view showing an example, is a graph explaining the difference in dyeing behavior between the dyed fabric of the present invention and a conventional dyed fabric. 1... Core thread, 2... Sheath thread, 3...
The filaments that make up the sheath thread. Spear I Picture Spear 2 Spear Z Picture

Claims (1)

[Scope of Claims] 1 Among two or more types of polyester filament yarns, one yarn is a core yarn, and the other yarn having micro groups or microcraters on the surface of the filaments surrounding it has a directional property between the filaments. A woven or knitted fabric using a false-twisted two-layer structure yarn wound in an alternately twisted manner without any strands, the woven or knitted fabric being dyed with an L value of 15 or less, thereby exhibiting a deep color and sharpness. A dyed cloth characterized by: 2. The dyed fabric according to claim 1, wherein the microgroup pore diameter is 0.1 to 0.5 μm. 3 Micro groups have a maximum value of frequency distribution of 0.1 to 0
．． The dyed fabric according to claim 1 or 2, which has a pore diameter in the range of 3 μm, is arranged in the fiber axis direction, and at least a part of which is in communication. 4 The size of the microcrater hole is 0.1 to 0.7μ
The dyed cloth according to claim 1, which is m. 5. The dyed fabric according to claim 1, wherein the false-twisted two-layer yarn has filament entanglement between the core and sheath yarns. 6. The dyed fabric according to claim 1, wherein the sheath yarn of the false-twisted two-layer yarn is easier to dye than the core yarn. 7. The dyed fabric according to claim 1, wherein the core yarn is made of a filament having micro groups or micro craters.