Master batch, chemical fiber and molding

Abstract

To provide a coloring master batch capable of improving carbon black peculiar reddish black to bluish black.SOLUTION: A master batch includes carbon black, copper phthalocyanine based pigment, perinone based pigment and a thermoplastic resin. The mass ratios of the copper phthalocyanine based pigment and the perinone based pigment to the carbon black are adjusted within a predetermined range; the master batch satisfies the following condition 1; and (condition 1) is molding a resin composition using the master batch to prepare a measurement sample having a thickness of 2.0 mm. An L* value, an a* value and a b* value obtained by measuring the surface of the measurement sample at a 2 degree field of view using the CIE standard light source D65 satisfy all conditions shown by the following expression (F1)-(F3), 26.0≤L* value≤27.75 ... (F1), -0.3≤a* value≤0.7 ... (F2) and -7.25≤b* value≤-6.25 ... (F3).SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to a masterbatch, a chemical fiber, and a molded article. [Background technology]

[0002] As a method for coloring chemical fibers, the dyeing method is effective in producing a deep bluish-black color tone. However, dyeing has some disadvantages in terms of the environment, such as drainage. In addition, pigments are more advantageous in terms of weather resistance. On the other hand, in addition to the dyeing method, there is also a concentrate coloring method for coloring chemical fibers. The concentrate coloring method is used when fibers that are difficult to dye or when fibers of the same color are produced in large quantities. In addition, the concentrate coloring method using carbon black is used to color black chemical fibers. However, although carbon black has excellent physical properties, it tends to produce a reddish-black hue. Therefore, there is a demand for improving this reddish-black hue to a bluish-black hue. For example, a masterbatch for coloring ultrafine fibers having a fiber diameter of 8 μm or less is described, which contains a thermoplastic resin, carbon black, a copper phthalocyanine pigment, and a copper phthalocyanine sulfonic acid derivative (Patent Document 1). A method for producing polyester is described in which carbon black and chlorine-substituted copper phthalocyanine in an amount 0.3 to 2 times the weight of carbon black are added during polyester production (Patent Document 2). A method for improving the hue of black polyester is described in which imidomethylphthalocyanine is added in an amount 0.05 to 4 times the weight of carbon black when coloring the polyester black with carbon black (Patent Document 3). A method for coloring polyamide using carbon black in combination with a specific copper phthalocyanine derivative has been described (Patent Document 4). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-109897 [Patent Document 2] Japanese Patent Application Publication No. 49-087792 [Patent Document 3] Special Publication No. 59-021903 [Patent Document 4] Special Publication No. 6-035540 Summary of the Invention [Problem to be solved by the invention]

[0004] When using the masterbatches and coloring methods described in Patent Documents 1 to 4, it is possible to improve the hue of chemical fibers to a bluish black color. However, the masterbatches and coloring methods described in Patent Documents 1 to 4 do not produce a deep bluish black color, and there are cases where the chemical fibers cannot be adjusted to the required bluish black color. That is, * Only value - no direction, a * The value also fluctuates. And, b * In order to shift only the value in the negative direction, it is necessary to use a purple pigment in combination, and to produce a color tone that does not go toward the reddish or greenish directions.

[0005] An object of the present invention is to provide a coloring masterbatch, chemical fiber, and molded product that can improve the reddish black color characteristic of carbon black to a bluish black color and has excellent dispersibility in thermoplastic resins. [Means for solving the problem]

[0006] According to the present invention, there are provided the following master batch, chemical fiber, and molded article. [1] A masterbatch containing carbon black, a copper phthalocyanine pigment, a perinone pigment, and a thermoplastic resin, The masterbatch satisfies the following condition 1: (Condition 1) A polyester resin ("MA-2103" manufactured by Unitika Ltd.) is blended with 1% by mass of titanium oxide white pigment ("TITONE A-160" manufactured by Sakai Chemical Industry Co., Ltd.), and the master batch is blended so that the blending amount of carbon black is 0.1% by mass. The resulting resin composition (blended amount 100% by mass) is kneaded to prepare a resin composition, which is then molded to prepare a measurement sample with a thickness of 2.0 mm. The surface of this measurement sample is measured using CIE standard illuminant D65 at a 2-degree visual field, and the L * Value, a * value, and b * The value satisfies all of the conditions shown in the following formula (F1), the following formula (F2), and the following formula (F3). 26.0≦L * Value ≦ 27.75 (F1) -0.3≦a * Value ≦ 0.7 (F2) -7.25≦b * Value ≦-6.25 (F3)

[0007] [2] The masterbatch according to [1], wherein the average primary particle diameter of the carbon black is 10 nm or more and 50 nm or less.

[0008] [3] The masterbatch according to [1] or [2], wherein the average particle size of the copper phthalocyanine pigment is 80 nm or more and 100 nm or less.

[0009] [4] The masterbatch according to any one of [1] to [3], wherein the perinone pigment has an average particle size of 1,000 nm or more and 5,000 nm or less.

[0010] [5] A chemical fiber colored with the masterbatch according to any one of [1] to [4].

[0011] [6] A molded product colored with the masterbatch according to any one of [1] to [4]. Effect of the Invention

[0012] According to the present invention, the reddish black color characteristic of carbon black can be improved to a bluish black color, and further, a coloring masterbatch, chemical fiber, and molded product having excellent dispersibility in thermoplastic resins can be provided. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] <Master batch> Hereinafter, an embodiment of the present invention will be described, but the present invention is not limited to the following embodiment. The master batch according to this embodiment contains carbon black, a copper phthalocyanine pigment, a perinone pigment, and a thermoplastic resin. Moreover, the masterbatch according to this embodiment must satisfy the following condition 1.

[0014] (Condition 1) A polyester resin ("MA-2103" manufactured by Unitika Ltd.) is mixed with 1% by mass of titanium oxide white pigment ("TITONE A-160" manufactured by Sakai Chemical Industry Co., Ltd.) and the master batch is mixed so that the carbon black content is 0.1% by mass. The resulting resin composition (content 100% by mass) is kneaded and molded to prepare a measurement sample with a thickness of 2.0 mm. The surface of this measurement sample is measured with a CIE standard illuminant D65 at a 2-degree visual field, and the L * Value, a * value, and b * The value satisfies all of the conditions shown in the following formula (F1), the following formula (F2), and the following formula (F3). 26.0≦L * Value ≦ 27.75 (F1) -0.3≦a * Value ≦ 0.7 (F2) -7.25≦b * Value ≦-6.25 (F3)

[0015] L * If the value is less than 26.0, or L *If the value exceeds 27.75, when chemical fibers are colored using the masterbatch, it is not possible to adjust the hue of the superior bluish black color with a high-class feel. * The value is preferably 26.25 or more and 27.5 or less, and more preferably 26.5 or more and 27.25 or less.

[0016] a * If the value is less than -0.3, or * If the value is more than 0.7, when chemical fibers are colored using the masterbatch, it is not possible to adjust the color to a high-quality, excellent bluish black color. * The value is preferably in the range of -0.2 to 0.6, and more preferably in the range of -0.1 to 0.5.

[0017] b * If the value is less than -7.25, or * If the value is more than -6.25, when chemical fibers are colored using the masterbatch, it is not possible to adjust the color to a high-quality, excellent bluish black color. * The value is preferably greater than or equal to -7.0 and less than or equal to -6.5.

[0018] L * Value, a * value, and b * The L value can be adjusted by changing the type or amount of carbon black, copper phthalocyanine pigment, and perinone pigment, or by subjecting the raw materials to primary processing. * Value, a * value, and b * The value can be adjusted to the desired range. In addition, when a masterbatch that satisfies this condition 1 is used for, for example, a chemical fiber, the chemical fiber can be adjusted to an excellent bluish black hue. The use of the masterbatch is not limited to chemical fibers. The use of the masterbatch can be a sheet, a film, a molded product, etc.

[0019] The inventors of the present invention surmise that the reason why the masterbatch according to this embodiment can improve the reddish black color characteristic of carbon black to a bluish black color and further has excellent dispersibility in thermoplastic resins is as follows. That is, the master batch according to this embodiment contains, in addition to carbon black and a copper phthalocyanine pigment, a specific purple pigment (perinone pigment) in a predetermined ratio. * Only the value is shifted in the negative direction, and a color tone is produced that does not go in the reddish or greenish direction. Furthermore, the copper phthalocyanine pigment and the perinone pigment are each subjected to primary processing, and as a result, a masterbatch that satisfies the following condition 1 is obtained. In this way, a highly dispersed masterbatch that can be used for ultrafine fibers and has a hue comparable to that of the dyeing method is obtained, even though it is a masterbatch used for the concentrate coloring method. Conventionally, the color of the masterbatch was measured and the hue was adjusted when the chemical fiber was produced (diluted product). Therefore, when producing the chemical fiber, there were cases where the desired bluish black hue could not be adjusted due to the influence of the base resin. In contrast, the masterbatch according to the present embodiment satisfies condition 1, and therefore, when used in chemical fibers, the hue can be adjusted to the desired bluish black hue. In addition, the color difference of the sample increased in the measurement sample to which the titanium oxide white pigment was added, so that the L * Value, a * value, and b * By adjusting the value, the hue of the diluted product can be adjusted more precisely. * Value, a * value, and b * By setting the values ​​within the respective prescribed ranges, when the material is used in a chemical fiber, it is possible to adjust the hue of the material to the required bluish black color.

[0020] (Carbon Black) Carbon black is an important colorant for imparting blackness. Carbon black can be used if it is commercially available. Carbon black has different characteristics depending on the manufacturing method. However, depending on the manufacturing method, the oxygen-containing group ash on the carbon black surface may change the pH and at the same time leave undecomposed organic matter, which may cause the generation of odorous components or VOCs. Specific carbon blacks include furnace black, channel black, acetylene black, and thermal black. These may be used alone or in combination of two or more. From the viewpoint of the color obtained by the liquid coloring method, the average primary particle size of carbon black is preferably 10 nm or more and 50 nm or less, more preferably 13 nm or more and 40 nm or less, and particularly preferably 13 nm or more and 30 nm or less.

[0021] From the viewpoint of the color obtained by the liquid coloring method, the carbon black content is preferably from 10.2 to 13.8% by mass, and more preferably from 10.8 to 13.2% by mass, relative to 100% by mass of the masterbatch.

[0022] (Copper phthalocyanine pigment) The copper phthalocyanine pigment is a blue colorant. This copper phthalocyanine pigment is excellent in weather resistance, heat resistance, durability, etc. In addition, by blending a predetermined amount of this copper phthalocyanine pigment, the L * Value, a * value, and b * The value can be adjusted to the desired range. When using a blue colorant other than a copper phthalocyanine pigment, the L * Value, a * value, and b * It becomes difficult to adjust the value to the desired range. The copper phthalocyanine pigment includes copper phthalocyanine and copper phthalocyanine derivatives. The copper phthalocyanine pigment may be subjected to, for example, rosin treatment. Commercially available copper phthalocyanine pigments include CI Pigment Blue (hereinafter also referred to as PB)-15:1, PB-15:2, PB-15:3, and PB-15:4, etc. These may be used alone or in combination of two or more. From the viewpoint of the color obtained by the concentrate coloring method, the average particle size of the copper phthalocyanine pigment is preferably 80 nm or more and 100 nm or less.

[0023] From the viewpoint of the color obtained by the concentrate coloring method, the content of the copper phthalocyanine pigment is preferably 3.1% by mass or more and 4.7% by mass or less, and more preferably 3.5% by mass or more and 4.3% by mass or less, relative to 100% by mass of the master batch. In addition, the mass ratio of the copper phthalocyanine pigment to the carbon black (copper phthalocyanine pigment / carbon black) is preferably 1 / 5 or more and 1 / 2 or less, more preferably 1 / 4 or more and 2 / 5 or less, and particularly preferably 3 / 10 or more and 7 / 20 or less.

[0024] (Perinone pigments) The perinone pigment is a purple colorant. This perinone pigment has excellent weather resistance, heat resistance, and durability. In addition, by blending a specified amount of this perinone pigment, the L * Value, a * value, and b * The value can be adjusted to the desired range. When using a purple colorant other than a perinone pigment, the L * Value, a * value, and b * It becomes difficult to adjust the value to the desired range. As the perinone pigment, commercially available perinone pigments can be appropriately used. These may be used alone or in combination of two or more kinds. From the viewpoint of the color obtained by the concentrate coloring method, the average particle size of the perinone pigment is preferably 1000 nm or more and 5000 nm or less, more preferably 1500 nm or more and 4000 nm or less, and particularly preferably 2000 nm or more and 3000 nm or less.

[0025] From the viewpoint of the color obtained by the concentrate coloring method, the content of the perinone pigment is preferably 3.1% by mass or more and 4.6% by mass or less, and more preferably 3.5% by mass or more and 4.2% by mass or less, relative to 100% by mass of the master batch. In addition, the mass ratio of the perinone pigment to the carbon black (perinone pigment / carbon black) is preferably 1 / 5 or more and 1 / 2 or less, more preferably 1 / 4 or more and 2 / 5 or less, and particularly preferably 3 / 10 or more and 7 / 20 or less.

[0026] (thermoplastic resin) The thermoplastic resin is a base resin that serves as a binder for the master batch. This thermoplastic resin is preferably the same as the resin of the chemical fiber. Examples of the thermoplastic resin include polyolefin resins (polyethylene resins, polypropylene resins, etc.), polystyrene resins, acrylonitrile-butadiene-styrene (ABS) resins, polycarbonate resins, polyamide resins, polyester resins, polymethylmethacrylate resins (PMMA), and polybutylene terephthalate resins. These may be used alone or in combination of two or more. Among these, it is preferable to use polyester resins. The polyester resin may be homo-PET or copolymerized PET.

[0027] The content of the thermoplastic resin is preferably within a range that allows the dispersion state of the carbon black, the copper phthalocyanine pigment, and the perinone pigment to be maintained. From this viewpoint, the total content of the carbon black, the copper phthalocyanine pigment, and the perinone pigment is preferably 15.8% by mass or more and 23.7% by mass or less, and more preferably 17.7% by mass or more and 21.7% by mass or less, relative to 100% by mass of the master batch.

[0028] (Other ingredients) The master batch according to this embodiment may contain carbon black, pigments other than copper phthalocyanine pigments and perinone pigments, inorganic fillers (silica, titanium, and the like), ester wax, polyethylene wax, antioxidants, ultraviolet absorbers, antistatic agents, flame retardants, surfactants, and the like, as long as the effects of the present invention are not impaired.

[0029] <Masterbatch manufacturing method> Next, a method for producing a masterbatch according to this embodiment will be described. The masterbatch according to this embodiment can be produced, for example, by a method including the following steps 1 to 3. Step 1: Producing a blue material containing a copper phthalocyanine pigment and a thermoplastic resin Step 2: Producing a purple material containing a perinone pigment and a thermoplastic resin Step 3: Mixing carbon black, a blue material, a purple material, and a thermoplastic resin to prepare a master batch.

[0030] In step 1, a blue material containing a copper phthalocyanine pigment and a thermoplastic resin is prepared. The copper phthalocyanine pigment and the thermoplastic resin are as described above. Methods for producing the blue material include kneading using various mixers such as a high-speed mixer (e.g., a Henschel mixer) or a tumbler, or melt-kneading using a kneading device such as a Banbury mixer, a roll, a plastograph, a single-screw extruder, a twin-screw extruder, or a kneader.

[0031] In step 2, a purple material containing a perinone pigment and a thermoplastic resin is prepared. The perinone pigment and the thermoplastic resin are as described above. The method for producing the purple material can be the same as that in step 1.

[0032] Carbon black, a blue material, a purple material, and a thermoplastic resin are mixed to prepare a master batch. The carbon black is as described above. However, the carbon black may be a black material containing carbon black and a thermoplastic resin. In this case, the same method as in step 1 can be used as a method for producing the black material. The blue and purple materials are as described above. As a method for mixing the carbon black, the blue material, the purple material, and the thermoplastic resin, the same method as in step 1 can be used. However, in step 3, it is preferable to thoroughly mix the components using a Henschel mixer or the like, and then melt-knead the components using an extruder or the like, since this can increase production efficiency. In addition, it is preferable to use a twin-screw extruder as the extruder. After melt-kneading the components using a kneading device such as an extruder and extruding the kneaded mixture into a strand shape, the kneaded mixture extruded into a strand shape can be processed into a desired form such as pellets or flakes. The temperature during melt kneading is preferably 200°C or higher and 300°C or lower, and more preferably 260°C or higher and 280°C or lower.

[0033] <Synthetic fibers> The chemical fiber according to the present embodiment is colored with the master batch according to the present embodiment. The chemical fiber can be produced, for example, by mixing the master batch with a resin for forming the chemical fiber and extruding the mixture from a spinneret (nozzle). Examples of resins for forming chemical fibers include polyester resins and polyamide resins. The chemical fiber according to this embodiment uses the masterbatch according to this embodiment described above, and therefore can be adjusted to have an excellent bluish black hue with a luxurious feel.

[0034] <Molded object> The molded product according to the present embodiment is colored with the masterbatch according to the present embodiment described above. This molded product can be produced, for example, by molding a resin composition colored with the masterbatch according to the present embodiment. The resin used here may be the thermoplastic resin described above. The molded product according to this embodiment uses the masterbatch according to this embodiment described above, and therefore can be adjusted to have an excellent bluish black hue with a luxurious feel. EXAMPLES

[0035] The present invention will be described in detail below with reference to examples, but the present invention is not limited to these examples. In the examples and comparative examples, "parts" and "%" are by mass unless otherwise specified.

[0036] [Example 1] (Preparation of blue material-1) 50 parts of a blue copper phthalocyanine pigment (product name "Cyanine Blue 4920D", Dainichi Seika Chemicals Mfg. Co., Ltd., average particle size 80 to 100 nm) and 50 parts of a polyester resin (melting point 110° C., intrinsic viscosity 0.70) were melt-kneaded. 40 parts of this kneaded material and 60 parts of polyester resin (melting point 260° C., intrinsic viscosity 0.68) were mixed and kneaded to prepare blue material-1.

[0037] (Preparation of purple material-1) 50 parts of a purple perinone organic pigment (average particle size: 2000 to 3000 nm) and 50 parts of a polyester resin (melting point: 110° C., intrinsic viscosity: 0.70) were melt-kneaded. 40 parts of this kneaded mixture and 60 parts of polyester resin (melting point 260° C., intrinsic viscosity 0.68) were mixed and kneaded to prepare purple material-1.

[0038] (Preparation of black material-1) 20 parts of carbon black (average primary particle diameter 19 nm) and 80 parts of polyester resin (product name "MA-2103", manufactured by Unitika Ltd.) were thoroughly mixed using a Henschel mixer. This mixture was kneaded at 260°C to 280°C using a twin-screw extruder to produce black material-1.

[0039] (Masterbatch Production) The obtained blue material-1, purple material-1, and black material-1, as well as a polyester resin (product name "MA-2103", manufactured by Unitika Ltd.) were weighed to a predetermined concentration and thoroughly mixed using a Henschel mixer. The blended mixture was kneaded at 260°C to 280°C using a twin-screw extruder to produce a master batch (MB-1) in the form of cylindrical pellets.

[0040] (Preparation of test pieces (molded products) for color evaluation) The obtained master batch, the same polyester resin as the polyester resin used in the master batch, and titanium oxide pigment were dry-blended to prepare a resin composition for color evaluation. At this time, the composition was adjusted to a carbon black pigment concentration of 0.1 mass% and a titanium oxide pigment concentration of 1.0 mass%, and kneaded at 260°C to 280°C using a single-screw extruder to obtain cylindrical pellets. The titanium oxide pigment was added to increase the color difference. Next, the resin composition was molded using a molding machine (manufactured by Yamashiro Seiki Seisakusho, molding machine name: SAV-40-50-CP) to prepare a molded product having a thickness of 2 mm.

[0041] [Example 2] A master batch (MB-2) and a molded product were produced in the same manner as in Example 1, except that carbon black (average primary particle size: 19 nm) was used instead of black material-1.

[0042] [Comparative Example 1] (Preparation of blue material-2) 50 parts of a blue copper phthalocyanine pigment (product name "Cyanine Blue A044", Dainichiseika Chemicals Mfg. Co., Ltd., average particle size 60 to 80 nm) and 50 parts of a polyester resin (melting point 110° C., intrinsic viscosity 0.70) were melt-kneaded. 40 parts of this kneaded material and 60 parts of polyester resin (melting point 260° C., intrinsic viscosity 0.68) were mixed and kneaded to prepare blue material-2.

[0043] (Preparation of master batches and molded products) A master batch (MB-C1) and a molded product were produced in the same manner as in Example 1, except that the obtained blue material-2 was used instead of the blue material-1.

[0044] [Comparative Examples 2 to 8] Except for changing the formulation as shown in Table 1, the same procedures as in Example 1 were carried out to prepare masterbatches (MB-C1 to MB-C8) and molded products.

[0045] [Comparative Example 9] A master batch (MB-C9) and a molded product were prepared in the same manner as in Example 1, except that carbon black (average primary particle diameter 19 nm) was used instead of black material-1, blue copper phthalocyanine pigment (product name "Cyanine Blue 4920D", manufactured by Dainichi Seikagaku Kogyo Co., Ltd., average particle diameter 80 to 100 nm) was used instead of blue material-1, and purple perinone organic pigment (average particle diameter 2000 to 3000 nm) was used instead of purple material-1.

[0046] [Examples 3 to 6] Masterbatches (MB-3 to MB-6) and molded products were produced in the same manner as in Example 1, except that the blending ratio was changed to that shown in Table 2.

[0047] [Examples 7 to 14] Except for changing the formulation as shown in Table 3, the same procedures as in Example 1 were carried out to prepare masterbatches (MB-7 to MB-14) and molded products.

[0048] <Hue evaluation> The molded products obtained in the examples and comparative examples were measured for lightness and chroma using a spectrophotometer (CM-3600d) manufactured by Konica Minolta, Inc., using the SCI method with a D65 light source and a viewing angle of 2 degrees. The results of Examples 1 and 2 and Comparative Examples 1 to 8 are shown in Table 1. Table 1 also shows the name of the master batch used in each example and the compounding composition of each molded product. The results of Example 1 and Examples 3 to 6 are shown in Table 2. Table 2 also shows the name of the master batch used in each example and the compounding composition of each molded product. The results of Example 1 and Examples 7 to 14 are shown in Table 3. Table 3 also shows the name of the master batch used in each example and the compounding composition of each molded product.

[0049] [Table 1]

[0050] [Table 2]

[0051] [Table 3]

[0052] The CIE L color space was established by the International Commission on Illumination (CIE) as a method of expressing color tones, and is a color space that expresses the colors we see with our eyes. * a * b * There is a color space (CIE L) * a * b * In the color system, color is expressed by three coordinates, and lightness is "L * ", red to green is "a * (positive is reddish, negative is greenish), yellow to blue is "b * " (positive is yellowish, negative is blueish) and the bluish black tone is L * Value and b * The value is negative, a *The value close to 0 is displayed as ideal. By using the master batches (MB-1 to MB-14) of the present invention, the L * Value, a * value, and b * Since the value satisfies all the conditions shown in the formulas (F1), (F2), and (F3), there are many advantages in terms of quality stability, production costs, and material costs, and there is a high possibility that it will be used effectively. In this way, the masterbatch of the present invention has the effect of color (bluish black) required for diversifying needs.

[0053] <Dispersibility evaluation> The master batch (MB-1) obtained in Example 1 and the master batch (MB-C9) obtained in Comparative Example 9 were prepared. Then, 2,920 g of each master batch and 580 g of polyester resin (product name "MA-2103", manufactured by Unitika Ltd.) were mixed in a tumble mixer to prepare a measurement sample. In addition, a φ30 mm melt spinning machine was modified to be a pressure rise measuring machine. Specifically, the spinning pack at the tip was removed, a 635 mesh screen and a breaker plate were attached, and the head was replaced with a resin pressure gauge attached between the screen and the gear pump to form the pressure rise measuring machine. 3,500 g of the measurement sample prepared was charged from the hopper of this pressure rise measuring machine, and the resin pressure at the start of discharge and the resin pressure when the measurement sample disappeared from the hopper were measured. Then, the difference between these measured resin pressures (pressure rise (kgf / cm 2 The results are shown in Table 4. The smaller the pressure rise value, the better the pigment dispersibility can be evaluated. The pressure rise tester had a breaker plate with 61 holes and a total filtration area of ​​48 mm 2 The conditions were: discharge rate 75 g / min, cylinder temperature 280° C., and screw rotation speed 45 rpm.

[0054] [Table 4]

[0055] From the results shown in Table 4, it was found that when the masterbatch (MB-1) of the present invention was used, the value of the increased pressure was small and the dispersibility of the pigment was good.

[0056] <Preparation of test pieces (fiber) for color evaluation and color evaluation> [Examples 15 to 16 and Comparative Examples 10 to 11] The master batch (MB-1) obtained in Example 1 was prepared. In addition, a comparative master batch (MB-C10) was produced in the same manner as in Example 1, except that the blue material-1 and the purple material-1 were not used. Using these masterbatches, resin compositions for hue evaluation were prepared assuming the composition when manufacturing the product. Specifically, the masterbatches and the same polyester resin as the polyester resin used in the masterbatches were dry-blended to prepare resin compositions for hue evaluation. At this time, the concentrations of carbon black, blue copper phthalocyanine pigment, and purple perinone organic pigment were adjusted to the compositions shown in Table 5, respectively, and the resin compositions were spun by kneading at 260°C to 280°C using a spinning machine to produce 3.3 decitex threads (fibers).

[0057] [Hue evaluation] The lightness and chroma of the yarns obtained in Examples 15 to 16 and Comparative Examples 10 to 11 were measured using a spectrophotometer (CM-3600d) manufactured by Konica Minolta, Inc., using the SCI method with a D65 light source and a 2-degree viewing angle. The results are shown in Table 5.

[0058] [Table 5]

[0059] From the results shown in Table 5, if the master batch (MB-1) of the present invention is used, b * The value is negative, a * It was found that a bluish black color tone with a value close to 0 could be achieved.

Claims

1. A master batch containing carbon black, a copper phthalocyanine pigment, a perinone pigment, and a thermoplastic resin, a mass ratio of the copper phthalocyanine pigment to the carbon black (copper phthalocyanine pigment / carbon black) is 1 / 5 or more and 1 / 2 or less; a mass ratio of the perinone pigment to the carbon black (perinone pigment / carbon black) is 1 / 5 or more and 1 / 2 or less; The masterbatch satisfies the following condition 1: (Condition 1) A polyester resin ("MA-2103" manufactured by Unitika Ltd.) is blended with 1% by mass of titanium oxide white pigment ("TITONE A-160" manufactured by Sakai Chemical Industry Co., Ltd.), and the master batch is blended so that the blending amount of carbon black is 0.1% by mass. The resulting resin composition (blended amount 100% by mass) is kneaded and molded to prepare a measurement sample having a thickness of 2.0 mm. The surface of this measurement sample is measured using CIE standard light source D65 at a 2-degree visual field, and the L ＊ Value, a ＊ value, and b ＊ The value satisfies all of the conditions shown in the following formula (F1), the following formula (F2), and the following formula (F3). 26.0≦L ＊ Value ≦ 27.75 ... (F1) −0.3≦a ＊ Value ≦ 0.7 ... (F2) −7.25≦b ＊ Value ≦-6.25 ... (F3)

2. 2. The masterbatch according to claim 1, wherein the carbon black has an average primary particle size of 10 nm or more and 50 nm or less.

3. 2. The masterbatch according to claim 1, wherein the copper phthalocyanine pigment has an average particle size of 80 nm or more and 100 nm or less.

4. 2. The masterbatch according to claim 1, wherein the perinone pigment has an average particle size of 1,000 nm or more and 5,000 nm or less.

5. A chemical fiber colored with the masterbatch according to any one of claims 1 to 4.

6. A molded article colored with the masterbatch according to any one of claims 1 to 4.

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