Blended Yarn

Abstract

To provide a combined filament yarn suitable for producing a natural cotton-like fabric having a soft texture, swelling and moderate fuzziness.SOLUTION: A combined filament yarn has a multifilament structure including three types of fibers having a different fiber diameter that are mixed. The fibers each are uniformly dispersed without deviation.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a multifilament containing three types of fibers with different fiber diameters, and relates to a mixed yarn suitable for producing a natural cotton-like fabric. [Background technology]

[0002] Synthetic fibers made of polyester, polyamide, etc. have excellent mechanical properties and dimensional stability, and are therefore widely used in a wide range of applications, from clothing to non-clothing. However, as people's lives have become more diverse and they are seeking a better life, there is a demand for more advanced texture and functionality in many applications, including clothing. Among these, "ultra-thin fiber" has a significant effect on the properties of the fiber itself and the properties after it is made into fabric, and is one of the mainstream technologies for adding high value to fibers from the perspective of controlling the cross-sectional morphology of the fiber.

[0003] Fibers are materials with thin and long morphological characteristics, and their ultra-fineness enhances their properties, specifically increasing the specific surface area (surface area per weight) and the flexibility of the material. As a result, in addition to a soft feel, ultra-fine fibers have become textiles that appeal to the unique characteristics of ultra-fine fibers, such as the fine-haired touch and drape of the fabric surface, and have been used for a relatively long time as artificial leather and textiles with new textures, and more recently, they have been used in functional clothing that takes advantage of the dense fabric shape to provide windproof, water-absorbent, and water-repellent properties.

[0004] However, from the viewpoint of material mechanics, as the fiber diameter decreases, the second moment of area (material rigidity) decreases in proportion to the fourth power of the fiber diameter, and since ultrafine fibers alone will reduce the stiffness and bulkiness when made into a fabric, they are often mixed with other fibers when made into a textile. Specifically, it is known that by making ultrafine fibers into a mixed yarn with multifilaments having different fineness, mechanical properties, and shrinkage properties, it is possible to obtain a fabric that has bulkiness and mechanical properties while making use of the unique characteristics of ultrafine fibers.

[0005] Generally, the methods of obtaining mixed yarns are used, which are obtained by mixing the fibers during the spinning and drawing process of multifilaments, or by advanced processing such as air entangling and twisting. These manufacturing methods can be selected according to the desired form of the mixed yarn, and can make it possible to produce fabrics with various functions.

[0006] Patent Document 1 proposes an ultrafine blended yarn that is fine but has a bulky and soft feel by blending two types of fibers with different single yarn finenesses by air entangling.

[0007] Patent Document 2 proposes a mixed fiber false-twisted yarn having excellent texture and a natural heathered appearance, which is obtained by making a different shrinkage mixed yarn of a splittable composite fiber and a polyester fiber having a boiling water shrinkage rate higher by 5% or more, and then splitting the splittable composite fiber to generate ultrafine fibers.

[0008] Patent Document 3 proposes a mixed yarn of at least three or more types of filament yarns, in which low-shrinkage ultrafine fibers are arranged on the surface of the mixed yarn, high-shrinkage thick-fineness yarns are arranged in the inner layer, and low-shrinkage medium-fineness yarns are arranged in the middle layer and the surface layer, thereby enabling a more functional fabric. [Prior art documents] [Patent documents]

[0009] [Patent Document 1] JP 2010-196227 A (Claims) [Patent Document 2] JP 2005-290638 A (Claims) [Patent Document 3] JP 10-212629 A (Claims) Summary of the Invention [Problem to be solved by the invention]

[0010] In Patent Document 1, yarns collected separately in post-processing are mixed to form a two-layer structure yarn in which highly shrinkable fibers are arranged in the core and ultrafine fibers are arranged in the sheath, and the technical idea is that each fiber is unevenly distributed. In this case, the ultrafine fibers are mainly arranged on the surface of the fabric, and unless the weaving and knitting structure is devised, the ultrafine fibers arranged as the sheath may be unnecessarily frayed due to excessive friction. In addition, in the fiber existence form disclosed here, the ultrafine fibers are densely present, so there are restrictions on the expression of bulkiness when viewed from the entire yarn bundle, and the targeted properties may not be fully exhibited.

[0011] In Patent Document 2, a blended yarn of splittable composite fiber and high shrinkage fiber is used, and ultrafine fibers are generated by a splitting process, but the blending of these fibers is achieved by post-blending such as false twisting and entangling, which results in the ultrafine fibers being densely arranged in some places, and furthermore, the high shrinkage fiber shrinks significantly due to heat applied in the advanced processing step, and becomes unevenly distributed toward the center of the yarn bundle. Therefore, the uneven distribution of the ultrafine fibers becomes more pronounced, and there are cases where the unique touch and texture of a blended yarn in which fibers with different fiber diameters are uniformly distributed cannot be achieved.

[0012] Patent Document 3 describes a technical point in which three or more types of filament yarn groups with different finenesses, including ultrafine fibers, are mixed in a certain ratio. This effect results in medium-fineness yarns being present between thick-fineness yarns in the yarn bundle, aiming to suppress uneven distribution of thick and thin yarns caused by fiber shrinkage during the advanced processing step. However, the three or more types of yarn groups are produced separately and then finally mixed in a post-mixing step. This does not eliminate the uneven distribution of each yarn group, and each yarn group is partially densely arranged, resulting in an unevenly dispersed state, which does not maximize the desired effect and may result in a deterioration in the surface appearance and feel.

[0013] As described above, it is difficult to say that the mixed yarns containing ultrafine fibers achieved by the conventional techniques can fully exhibit the fabric properties unique to ultrafine fibers due to partial uneven distribution of the ultrafine fibers, and there has been a demand for a mixed yarn that realizes a fabric in which ultrafine fibers are uniformly and bulkily present in the multifilament and that effectively exhibits the texture derived from the ultrafine fibers and the functions due to the increased specific surface area. [Means for solving the problem]

[0014] The above-mentioned problems of the conventional technology are solved by the following. (1) In a multifilament containing three types of fibers with different fiber diameters, the fiber with the largest fiber diameter (fiber A), the fiber with the medium fiber diameter (fiber B), and the fiber with the smallest fiber diameter (fiber C) are present uniformly and without bias, and the abundance ratio R of fiber B to fiber A is AB is 1.0 to 3.0, and the abundance ratio of fiber C to fiber A R AC is 14.8 to 98.0, fiber A is polyamide, fiber B and fiber C are polyester wherein the fiber diameter ratio of fiber B to fiber A is 0.25 or more and 0.60 or less, the fiber diameter ratio of fiber C to fiber A is 0.05 or more and 0.25 or less, the fiber diameter of fiber A is 7.5 μm or more and 25 μm or less, the fiber diameter of fiber C is 0.50 μm or more and 5.0 μm or less, and the irregularity of fiber A is 1.2 or more and 2.0 or less. A mixed fiber yarn characterized by: (2) The above (1) To A textile product made of the blended yarn described above. It is. Effect of the Invention

[0015] The mixed yarn of the present invention is a multifilament containing three different fibers with different fiber diameters, namely, the fiber with the largest fiber diameter (fiber A), the fiber with the middle fiber diameter (fiber B), and the fiber with the smallest fiber diameter (fiber C), in which the fibers are homogeneously dispersed. Therefore, in the fabric made of the mixed yarn of the present invention, the fiber C, i.e., the ultrafine fiber, is homogeneously dispersed on the surface of the fabric and in the cross-sectional direction thereof, so that the properties derived from the ultrafine fiber can be fully exhibited without impairing the bulkiness, and a natural cotton-like fabric with a unique feel that could not be achieved with fabrics made of conventional ultrafine fibers can be obtained, which produces characteristic softness and texture, and has functionality such as excellent water absorption and diffusion due to the dense structure woven by the ultrafine fibers. [Brief description of the drawings]

[0016] [Figure 1] FIG. 2 is a schematic diagram showing an example of the fiber diameter distribution of the fibers constituting the mixed yarn of the present invention. [Diagram 2] FIG. 1 is a schematic diagram of the cross-sectional structure of the mixed yarn of the present invention. [Diagram 3] FIG. 2 is a schematic diagram of a fiber cross section for explaining the degree of deformation of the present invention. [Figure 4] FIG. 1 is a schematic diagram of an example of a splittable conjugate fiber suitable for obtaining the mixed yarn of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The present invention will now be described in detail with reference to preferred embodiments.

[0018] The blended yarn of the present invention refers to a multifilament in which three types of fibers with different fiber diameters are mixed, and it is necessary that the fiber with the largest fiber diameter (fiber A), the fiber with the medium fiber diameter (fiber B), and the fiber with the smallest fiber diameter (fiber C) are present uniformly and without bias, which is an important requirement of the present invention.

[0019] In the present invention, the term "multifilament containing three types of fibers with different fiber diameters" refers to a state in which, when each fiber diameter is measured in the cross section of the mixed yarn, the yarn has three fiber diameter distributions (having three peaks) as exemplified in Fig. 1, in which the horizontal axis is fiber diameter and the vertical axis is number of fibers. Here, a group of fibers having fiber diameters within each distribution range (distribution width) is defined as one type, and the presence of three such fiber diameter distributions means that three types of fibers with different fiber diameters are mixed in the present invention.

[0020] The fiber diameter here is determined as follows. That is, an image of a cross section of a mixed fiber yarn embedded in an embedding agent such as epoxy resin or a fabric composed of the mixed fiber yarn is taken with a scanning electron microscope (SEM) at a magnification where 50 or more fibers can be observed. The cross-sectional area of ​​50 fibers randomly selected from the image of the cross section of the mixed fiber yarn is measured. The cross-sectional area here means the area of ​​a cross section perpendicular to the fiber axis in a two-dimensionally taken image. The diameter when the obtained cross-sectional area is converted into the area of ​​a perfect circle is taken as the fiber diameter, and the value is rounded to one decimal place in μm units. The above operation is performed for 10 images taken in the same manner, and the simple number average of the evaluation results of the 10 images is taken as the fiber diameter.

[0021] The distribution width of fiber diameters means a range of ±30% of the most abundant fiber diameter (peak value) in each fiber group. From the viewpoint of improving the quality of the textile product, the distribution width of each fiber group is preferably within a range of ±20% of the peak value, and more preferably within a range of ±10% of the peak value. In order to more effectively achieve the object of the present invention, it is preferable that each fiber diameter distribution is discontinuous and independent.

[0022] In order to achieve the object of the present invention, it is important that the fibers having the three different diameters as described above are present uniformly and without bias within the same cross section of the multifilament, that is, the fiber with the largest fiber diameter (fiber A), the fiber with the medium fiber diameter (fiber B), and the fiber with the smallest fiber diameter (fiber C).

[0023] Here, "uniformly and uniformly present" means that the presence index variation (presence index CV%) for fiber A, fiber B, and fiber C, defined by the following formula, is 20% or less. Variation in presence index = (standard deviation of presence index / presence index) x 100 (%) Here, the presence index is calculated as follows. An image of the cross section of the mixed yarn or the fabric composed of the mixed yarn is taken with a scanning electron microscope (SEM) at a magnification where 10 or more fibers A can be observed. From the two-dimensionally taken image, as shown in an example in Figure 2, one fiber A (4 in Figure 2) is randomly extracted ((1) in Figure 2), and a perfect circle is drawn (dashed line 7 in Figure 2) from the center point of the extracted fiber A so that 10 fibers A are included. The number of fibers A, fiber B (5 in Figure 2), and fiber C (6 in Figure 2) present inside the perfect circle are counted, and the ratio of the number of fibers A, fiber B, and fiber C to the total number of fibers present inside the perfect circle is taken as the presence index. In this case, if 1 / 2 or more of the fiber cross-sectional area is included inside the perfect circle, it is counted as one fiber. This value was evaluated for 20 images taken in the same manner, and the average value was evaluated as the presence index. The uniformity of each fiber contained in the blended yarn was evaluated from the variation in this presence index.

[0024] If the existence index variation here is 20% or less for each of fiber A, fiber B, and fiber C, it can be determined that each fiber present in the mixed yarn is substantially uniformly present, and in consideration of the object of the present invention, it has been found that it is an important factor to set the existence index variation of each fiber within this range. If it is within this range, in the fabric made of the mixed yarn of the present invention, fiber C, i.e., ultrafine fiber, is in a homogeneous dispersion state on the surface of the fabric and in the cross-sectional direction thereof, so that the unique touch and texture derived from the ultrafine fiber can be fully exhibited without impairing the bulkiness. Furthermore, from the viewpoint of suppressing uneven distribution of the fibers caused by heat shrinkage in the advanced processing step, it is effective for fiber B to be homogeneously dispersed in the multifilament, and particularly when fiber A is a high shrinkage fiber, it is possible to exhibit more remarkable bulkiness.

[0025] From the viewpoint of making the function of the ultrafine fibers more prominent, it is preferable that each fiber is uniformly dispersed within the multifilament, and therefore the variation in the presence index of each fiber is preferably 15% or less, and more preferably 10% or less.

[0026] In addition, in the blended yarn of the present invention, in order for each fiber to effectively play its role, the ratio R of fiber B to fiber A is AB is 1.0 to 3.0, and the abundance ratio of fiber C to fiber A R AC The requirement is that the value must be between 3.0 and 100.

[0027] The abundance ratio here is defined by the following formula. R AB = (Fiber B presence index) / (Fiber A presence index) R AC = (Fiber C presence index) / (Fiber A presence index) Fiber B in the present invention is essential for maintaining a homogeneous mixed state of each fiber within the multifilament, and plays a role in maintaining the bulky form of the yarn bundle while evenly disposing the three types of fibers.

[0028] That is, for example, the fibers of the present invention are processed by weaving, knitting, etc., and then, after being made into a fabric, are subjected to advanced processing under various dry heat or wet heat conditions. During this process, each fiber shrinks according to its respective yarn characteristics, but when three types of fibers are unevenly present or when the fabric is made up of two types of fibers, the shrinkage of the thick fiber pulls the other fibers, promoting fiber bias.

[0029] In the case of the fiber of the present invention, fiber B having an intermediate fiber diameter is evenly distributed in the yarn bundle. In particular, the abundance ratio R of fiber B to fiber A in the yarn bundle is AB is within the above-mentioned range, fiber B acts as a bridge between fiber A and fiber C, greatly suppressing the movement of fiber A toward the center of the yarn bundle caused by shrinkage, and while supported by fiber B, fiber A maintains a state of floating on the surface of the yarn bundle, forming a bulky structure due to the ultrafine fibers, and effectively expressing the flexibility and texture unique to ultrafine fibers. This bridge structure due to fiber B makes it difficult for fibers to become biased, both in the entire multifilament and because each yarn bundle maintains its bulky shape, and this makes the appearance and feel of the fabric made of this multifilament excellent.

[0030] The present invention is characterized in that this state is maintained. However, since a state in which at least one fiber B exists between two adjacent fibers A in the mixed yarn is a preferred embodiment, the existence ratio R AB The lower limit of is 1.0, and the range in which the effects of fiber A and fiber B are dominant is the abundance ratio R AB The practical upper limit for this is 3.0.

[0031] In the blended yarn of the present invention, the ratio R of fiber C to fiber A is AC If the ratio R is within the above range, the fabric can be expected to exhibit excellent properties such as drapeability by taking advantage of the specific surface area effect produced by the fiber C, i.e., the ultrafine fiber. In other words, the larger the ratio R, the more preferable it is in that the properties derived from the ultrafine fiber are more significantly exhibited. However, from the viewpoint of the bulkiness and mechanical properties of the fabric, the ratio R AC The upper limit of R is 100. In the present invention, the range in which the effect peculiar to ultrafine fibers is dominant is the abundance ratio R AC The lower limit is set at 3.0.

[0032] When the blended yarn satisfying the above requirements is made into a fabric such as a woven or knitted fabric, each fiber having a different diameter is present in a homogeneously dispersed state, which ensures suitable bulkiness and effectively exhibits the flexibility, texture and moderate fluffiness peculiar to ultrafine fibers, resulting in a natural-like fabric that has never been seen before.

[0033] Next, in the mixed yarn of the present invention, the fiber diameter ratio of fiber B to fiber A is preferably in the range of 0.60 or less, and the fiber diameter ratio of fiber C to fiber A is preferably in the range of 0.25 or less.

[0034] The object of the present invention is to obtain a mixed yarn having excellent touch and texture unique to ultrafine fibers or a fabric made of the mixed yarn. In order to more efficiently exert the effects of the present invention, it is preferable that the fiber diameter ratio of fiber B and fiber C to fiber A is within the above-mentioned range.

[0035] In the mixed yarn of the present invention, the touch and feel of the fabric made of the mixed yarn are determined by fiber A and fiber C, so that the fiber diameter ratio of fiber B to fiber A is preferably 0.60 or less in the present invention in order to avoid impairing the intended effect of the present invention. However, if the fiber diameter of fiber B is too small, the rigidity of fiber B decreases, and localization due to shrinkage of fiber A, which forms the framework of the mixed yarn, may occur in some parts of the textile. For this reason, the lower limit of the fiber diameter ratio of fiber B to fiber A is preferably 0.25 in the present invention.

[0036] In order to more efficiently utilize the unique and excellent texture of the ultrafine fibers of the present invention, the fiber diameter ratio of fiber C to fiber A is preferably in the range of 0.25 or less. On the other hand, if the fiber diameter of fiber C is too small, the fabric will exhibit excessive flexibility. For this reason, from the viewpoints of suppressing the sagging of the textile and maintaining a fluffy feel, the lower limit of the fiber diameter ratio of fiber C to fiber A in the present invention is preferably 0.05.

[0037] The ultrafine fibers referred to here must be on the order of microns or less in order to efficiently exert the effects expected in the present invention, and in the present invention, it is preferable that the fiber diameter of fiber C is 5 μm or less from the viewpoint of the texture and functionality of the fabric. From the viewpoint of making the functions unique to ultrafine fibers more prominent, the smaller the fiber diameter, the more preferable it is, but in consideration of development as a textile, the fabric containing ultrafine fibers may become white and lack color development due to diffuse reflection or transmission of light on the surface of the ultrafine fibers, so from the viewpoint of ensuring color development, it is preferable that the fiber diameter of fiber C is 0.50 μm or more.

[0038] Fiber A in the mixed yarn of the present invention is expected to play a role in providing the mechanical properties and stiffness of the mixed yarn and the fabric made of the mixed yarn. This is because, when the second moment of area, which is an index of the rigidity of a material, is considered, the second moment of area is proportional to the fourth power of the fiber diameter, and therefore, compared with fibers having a smaller fiber diameter, the fiber A has a clearly higher rigidity and exists as a skeleton in the mixed yarn. In view of the above, a fiber diameter of 7.5 μm or more is cited as a preferred range since the fabric can exhibit sufficient rigidity. On the other hand, if the fiber diameter of fiber A is excessively large, the rigidity of the entire mixed yarn increases more than necessary, and the excellent flexibility of the ultrafine fiber may not be fully utilized, so the fiber diameter of fiber A is preferably 25 μm or less.

[0039] Generally, it is known that giving fibers an irregular cross section gives them rigidity and luster, and fiber A in the mixed yarn of the present invention is no exception. By giving fibers an irregular cross section, it is possible to improve the quality of the fabric, such as firmness and luster. In particular, if fiber A has an irregular cross section with a recess, it is possible to create appropriate gaps between the fibers, and in combination with the dense structure formed by the ultrafine fibers being evenly arranged three-dimensionally, the capillary phenomenon effectively works, making it possible to fully exhibit functionality such as water absorption and diffusion, and therefore this is considered to be a preferable shape. From this perspective, it is preferable that the irregularity of fiber A in the mixed yarn of the present invention is 1.2 or more. Within this range, it is possible to express specific properties according to the irregularity, and it is possible to obtain a unique fabric that has not been seen before. In addition, the upper limit of the irregularity is set to 2.0, taking into consideration the viewpoint of not impairing the flexibility that is the object of the present invention and the viewpoint of the stability of the cross-sectional shape in high-level processing.

[0040] The irregularity here is determined according to the method illustrated in Figure 4. Using the same method as in the evaluation of the presence index, the cross section of the mixed yarn and the fabric made of the mixed yarn are photographed two-dimensionally. From the image, five fibers A are randomly selected, and the perfect circle (broken line 8 in Figure 3) that most frequently circumscribes the tip of the convex part on the outer periphery of the cross section of fiber A is taken as the circumscribing circle using image processing software, and its diameter is taken as L1. Next, the distance from the circumscribing circle to the deepest part of the concave part on the cross section of fiber A is measured, and this value is taken as L2. The irregularity is calculated to three decimal places from the formula: irregularity = L1 / (L1-L2), and the value after the third decimal place is rounded off to the nearest tenth. This irregularity is evaluated for 20 different images photographed in the same way, and the simple average value is rounded off to one decimal place to take the irregularity.

[0041] The polymers constituting the blended yarn of the present invention are not limited as long as they are melt-processable polymers and copolymers thereof, such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polytrimethylene terephthalate, polypropylene, polyolefin, polycarbonate, polyacrylate, polyamide, polylactic acid, thermoplastic polyurethane, and polyphenylene sulfide. From the viewpoint of the objective and effect of the present invention, a preferred polymer combination is one in which fiber A is polyamide, and fiber B and fiber C are polyester.

[0042] The polyamide referred to here is preferably polycaproamide (nylon 6) or polyhexamethylene adipamide (nylon 66), which are excellent in mechanical properties and can be easily developed as a textile, and polycaproamide (nylon 6) is more preferable from the viewpoint of being less likely to cause gelation during the spinning process and having excellent spinnability. Examples of other components include polydodecanoamide, polyhexamethylene adipamide, polyhexamethylene azelamide, polyhexamethylene sebacamide, polyhexamethylene dodecanoamide, polymetaxylylene adipamide, polyhexamethylene terephthalamide, and polyhexamethylene isophthalamide. Compared with polyester, polyamide generally has a low elastic modulus, which is an index of softness as a polymer characteristic, of about half or less, and from the viewpoint of flexibility, which is one of the appealing points of the present invention, it is preferable that fiber A is selected from these polymers.

[0043] On the other hand, the polyester referred to here is preferably selected from polyesters such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polytrimethylene terephthalate, and copolymers thereof. From the viewpoint of the objective of the present invention, which is to exhibit appropriate stiffness while maintaining flexibility, it is preferable that fiber B and fiber C are polyesters having excellent stiffness.

[0044] Furthermore, these polymers may contain various additives, such as inorganic substances such as titanium oxide, silica, and barium oxide, colorants such as carbon black, dyes, and pigments, flame retardants, fluorescent brighteners, antioxidants, and ultraviolet absorbing agents, as necessary, within the scope of the present invention.

[0045] When the mixed yarn of the present invention is used as at least a part of a textile product, the fibers having different diameters are uniformly dispersed to ensure favorable bulkiness, and the fibers can effectively exhibit the softness, texture, and moderate fluffiness peculiar to ultrafine fibers, making the textile suitable for use as a textile with a new texture. Furthermore, the ultrafine fibers are evenly arranged three-dimensionally to form a dense structure, which effectively exerts capillary action to exert excellent water absorption and diffusion properties, and the mixed yarn of the present invention can be suitably used for a wide range of textile products, from general clothing such as jackets, skirts, pants, and underwear, to sports clothing, clothing materials, interior products such as carpets, sofas, and curtains, vehicle interior products such as car seats, cosmetics, cosmetic masks, wiping cloths, health products, and various filters for daily life.

[0046] An example of the method for producing the mixed yarn of the present invention will be described in detail below.

[0047] The mixed fiber yarn of the present invention can be obtained by melt spinning for the purpose of producing continuous fibers, solution spinning such as wet and dry-wet methods, and melt blowing and spunbonding methods suitable for producing a sheet-like fiber structure, but from the viewpoint of increasing productivity, the melt spinning method is preferred.

[0048] There are various methods for producing the mixed yarn of the present invention, such as a spinning mixed fiber method in which fibers having different fiber diameters that are separately discharged from the discharge holes of a spinneret during spinning are simultaneously drawn up, and a post-mixing method in which the fibers obtained by separately spinning are mixed in a post-processing step by entangling or the like. From the viewpoint of mixing fibers having different fiber diameters in a homogeneously dispersed state in a multifilament, it is most suitable to produce the mixed yarn by using a splittable composite fiber having a core-sheath structure, in which the fiber cross section is composed of three types of segments of different sizes (segment A (9 in FIG. 4), segment B (10 in FIG. 4), and segment C (11 in FIG. 4) that are continuously present, which has a large area, as shown in the cross section of FIG. 4 as an example. In other words, by selecting a splittable composite fiber in which polymers are arranged alternately on the fiber surface, peeling and splitting is caused between segment A and segment B, and between segment A and segment C, due to heat and physical impact forces in the advanced processing step, resulting in a form in which fiber B and fiber C are arranged around a single fiber A in the same number as the number of segments.Therefore, by applying a multifilament of splittable composite fiber, the mixed yarn of the present invention can be achieved.

[0049] In the splittable conjugate fiber suitable for obtaining the mixed yarn of the present invention, the average area of ​​segment B is preferably three or more times the average area of ​​segment C in the fiber cross section perpendicular to the fiber axis. As illustrated in FIG. 4, the presence of a segment with a large area such as segment B causes asymmetry in the fiber cross section, which makes it difficult to disperse the stress during splitting, and makes it easier to promote splitting by heat treatment or physical impact. Furthermore, by having an area of ​​segment B 2.0 times or more the average area of ​​segment C, the stress during splitting is easily applied to segment B, and this segment B is preferentially removed, creating a movable space in the fiber cross section, resulting in a structure in which segment C is easily peeled off. In this way, the presence of three types of segments with different sizes ensures good passability through processing steps, while also exhibiting peel splittability in advanced processing steps such as scouring and dyeing where heat and physical impact are applied, making it easier to obtain the mixed yarn of the present invention.

[0050] Considering the above-mentioned division mechanism, from the viewpoint of promoting peel division, it is preferable to use a combination of different polymers, and it is preferable to use a combination of polymers having different heat shrinkage properties.

[0051] The polymer constituting the splittable composite fiber suitable for obtaining the mixed fiber of the present invention is not particularly limited as long as it is used in the manufacture of general synthetic fibers, and examples thereof include polyester, polyamide, polyolefin, and acrylic. However, in order to promote peeling and splitting at the interface of the segments, it is preferable to use a combination of polymers with low affinity between adjacent segments (segment A / segment B and segment A / segment C), and examples of such combinations include combinations of polyester and polyamide, polyester and polyolefin, and polyolefin and polyamide. Examples of polyesters include polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate, and copolymers thereof. Examples of polyamides include nylon 6, nylon 66, nylon 46, nylon 11, nylon 12, and copolymers thereof. Examples of polyolefins include polypropylene, polyethylene, polymethylpentene polybutene, and copolymers thereof. The combination of polymers of segment B and segment C is not particularly limited, but from the viewpoint of development into textiles, it is preferable to select from polyester and polyamide. Furthermore, these polymers may contain various additives in the polymer, such as inorganic substances such as titanium oxide, silica, and barium oxide, colorants such as carbon black, dyes, and pigments, flame retardants, fluorescent brighteners, antioxidants, and ultraviolet absorbing agents, as long as the object of the present invention is not impaired.

[0052] The spinneret used to produce splittable conjugate fibers suitable for obtaining the mixed yarn of the present invention by the melt spinning method is appropriately selected from those capable of combining two or more component polymers, and from the viewpoint of precisely controlling the desired number and size of segments of the multi-component polymers, the composite spinneret described in JP 2011-174215 A is preferably used. By using this composite spinneret, the cross-sectional shape can be formed with high precision, and it is possible to control the shape, size, arrangement, etc. of each segment in the fiber cross section, so it is preferable to select the above spinneret.

[0053] In the case of producing a splittable conjugate fiber suitable for obtaining the mixed yarn of the present invention, the spinning temperature is preferably set to a temperature at which the polymers used, which are determined from the above-mentioned viewpoints, mainly have a high melting point or high viscosity, exhibit fluidity. The temperature at which fluidity is exhibited varies depending on the polymer characteristics and its molecular weight, but the melting point of the polymer is a guide, and it may be set to a temperature of melting point + 60°C or less. If the temperature is below this, the polymer does not undergo thermal decomposition in the spinning head or spinning pack, and the molecular weight reduction is suppressed, and splittable conjugate fibers can be produced satisfactorily. The polymer discharge rate at this time can be in the range of 0.1 g / min / hole to 20.0 g / min / hole per nozzle, which allows melt discharge while maintaining stability. At this time, it is preferable to consider the pressure loss at the nozzle that ensures stable discharge. The pressure loss here is preferably set to a range of 0.1 MPa to 40 MPa, and the discharge rate is determined based on the relationship between the melt viscosity of the polymer, the nozzle hole diameter, and the nozzle hole length.

[0054] The ratio of the core component (segment A) to the sheath component (segment B + segment C) when spinning a splittable composite fiber suitable for obtaining the mixed yarn of the present invention can be selected within a range of 5 / 95 to 95 / 5 in terms of core / sheath ratio by weight based on the discharge amount. From the viewpoints of stable production of splittable composite fibers and long-term stability of the splittable composite cross section, it is preferable that the core / sheath ratio is within a range of 40 / 60 to 80 / 20.

[0055] The composite polymer flow discharged from the spinneret is cooled and solidified, and then taken up by a roller with a prescribed peripheral speed to obtain a composite fiber. The take-up speed is preferably about 500 to 6000 m / min, and can be changed depending on the physical properties of the polymer and the intended use of the fiber. In particular, from the viewpoint of achieving high orientation and improving mechanical properties, it is preferable to set the take-up speed to 500 to 4000 m / min and then draw the fiber, since this can promote uniaxial orientation of the fiber. In drawing, it is preferable to appropriately set the preheating temperature based on the temperature at which the polymer can be softened, such as the glass transition temperature of the polymer. The upper limit of the preheating temperature is preferably set to a temperature at which the fiber does not become turbulent due to spontaneous elongation during the preheating process.

[0056] The splittable conjugate fiber obtained as described above can be subjected to a heat treatment or physical impact to produce the mixed yarn of the present invention. It is also possible to obtain a mixed yarn by weight reduction treatment using a solvent or by utilizing the solvent swelling difference of the polymers, but from the viewpoint of promoting the elimination of the manufacturing process and the reduction of costs, it is preferable to use the heat shrinkage difference or the physical impact. In this case, the splittable conjugate fiber may be woven or knitted as a mixed yarn in advance, or the splittable conjugate fiber may be woven or knitted and then subjected to a high-level processing process such as scouring or dyeing to produce a fabric made of the mixed yarn. EXAMPLES

[0057] The mixed fiber yarn of the present invention will be specifically described below with reference to examples. A. Melt Viscosity of Polymer The chip-shaped polymer was dried in a vacuum dryer to a moisture content of 200 ppm or less, and the melt viscosity was measured by changing the strain rate stepwise using a Capillograph 1B manufactured by Toyo Seiki Co., Ltd. The measurement temperature was the same as the spinning temperature, and the melt viscosity was measured at 1216 s -1 The melt viscosity at 100°C is shown. Incidentally, the measurement was performed in a nitrogen atmosphere, with 5 minutes between the time the sample was placed in the heating furnace and the start of the measurement.

[0058] B. Melting point of the polymer The chip-shaped polymer was dried in a vacuum dryer to a moisture content of 200 ppm or less, and about 5 mg was weighed out. Using a TA Instruments differential scanning calorimeter (DSC) Q2000, the temperature was raised from 0°C to 300°C at a rate of 16°C / min, and then the temperature was held at 300°C for 5 minutes to perform DSC measurement. The melting point was calculated from the melting peak observed during the temperature rise process. Measurements were performed three times for each sample, and the average value was taken as the melting point. When multiple melting peaks were observed, the melting point was taken as the melting point of the melting peak with the highest temperature.

[0059] C. Fineness The weight of 100 m of the multifilament was measured, and the weight was multiplied by 100. This operation was repeated 10 times, and the average value was rounded off to one decimal place to obtain the fineness (dtex) of the multifilament.

[0060] D. Fiber diameter A cross section of a fabric made of mixed yarn embedded in an embedding agent such as epoxy resin, or a cross section of a fabric made of mixed yarn, is photographed with a Hitachi scanning electron microscope (SEM) at a magnification where 50 or more fibers can be observed. 50 fibers are randomly selected from the image of the cross section of the mixed yarn, and the cross section is measured using image processing software (WINROOF). The cross section here means the area of ​​a cross section perpendicular to the fiber axis in a two-dimensionally photographed image. The diameter of the cross section obtained by converting it into the area of ​​a perfect circle is taken as the fiber diameter, and the value is rounded to one decimal place in μm units. The above operation is performed for 10 images photographed in the same manner, and the simple number average of the evaluation results of the 10 images is taken as the fiber diameter of each fiber.

[0061] E. Presence index, presence index variation A cross section of a blended yarn or a fabric composed of blended yarn is photographed with a Hitachi scanning electron microscope (SEM) at a magnification where 10 or more fibers A can be observed. From the two-dimensionally photographed image, one fiber A is randomly selected, and a perfect circle is drawn from the center point of the selected fiber A so that 10 fibers A are included (dashed line 7 in Figure 2), and the number of fibers A, fibers B, and fibers C present inside the perfect circle is counted. The ratio of the number of fibers A, fibers B, and fibers C to the total number of fibers present inside the perfect circle is evaluated as a presence index. In this case, if 1 / 2 or more of the fibers are included inside the perfect circle, it is counted as 1 fiber. This value is evaluated for 20 images photographed in the same manner, and the following formula is used: Variation in presence index = (standard deviation of presence index / average presence index) x 100 (%) The presence index variation was calculated by the above.

[0062] F. Abundance ratio From the abundance index evaluated in E, the abundance ratio R of fiber B to fiber A AB , the abundance ratio of fiber C to fiber A R AC The following formula R AB = (Fiber B presence index) / (Fiber A presence index) R AC = (Fiber C presence index) / (Fiber A presence index) is defined as follows.

[0063] G. Degree of irregularity of fiber A For five fibers A randomly selected from the images taken in section E, the perfect circle (dashed line 8 in Fig. 3) that most frequently circumscribes the tip of the convex portion on the outer periphery of the cross section of fiber A was determined using image processing software as the circumscribing circle, and its diameter was determined as L1. Next, the distance from the circumscribing circle to the deepest part of the concave portion on the cross section of fiber A was measured, and this value was determined as L2. Irregularity = L1 / (L1-L2) was calculated to three decimal places, and the value rounded off to the nearest tenth was determined as the irregularity. This irregularity was evaluated for 20 different images taken in the same way, and the simple average value rounded off to one decimal place was determined as the irregularity.

[0064] H. Bulky The evaluation was carried out on a fabric consisting of a commonly used round cross-section N6 single yarn (56detx-40 filament) for the warp and a mixed yarn for the weft. The fabric was woven in a 1 / 3 twill weave with the number of fibers adjusted so that the cover factor (CFA) in the warp direction was 1000 and the cover factor (CFB) in the weft direction was 1200. Note that CFA and CFB are the warp density and weft density of the fabric measured in a 2.54 cm section in accordance with JIS-L-1096:2010 8.6.1, and CFA = warp density x (warp fineness). 1 / 2 , CFB = weft density x (weft fineness) 1 / 2 This value was calculated using the formula:

[0065] For the above-mentioned woven fabrics after dyeing, the bulkiness was calculated using the following formula, and the value rounded off to two decimal places was used to evaluate the bulkiness. Bulk Depth B u (cm 3 / g) = t / w × 1000 In the formula, t is the thickness of the fabric (mm), w is the weight of the fabric (g / m 2 ).

[0066] Here, the thickness was measured according to the A method (JIS method) described in JIS-L-1096:2010. That is, the thickness (mm) was measured at five different points of the sample using a thickness gauge under a fixed time and pressure, the average value was calculated, and the thickness (mm) was calculated by rounding off to two decimal places. The constant pressure during measurement was 23.5 Kpa.

[0067] The basis weight was measured according to the A method (JIS method) described in JIS-L-1096:2010. That is, two test pieces of 20 cm x 20 cm were taken, and the mass (g) of each was measured under standard conditions, and the basis weight was calculated by the following formula: 2 Mass per unit (g / m 2 ) and calculate the average value, then round off to the first decimal place to obtain the basis weight (g / m 2 ) was decided.

[0068] From the bulkiness obtained as described above, the bulkiness was evaluated into three levels based on the following criteria. ◎: Excellent bulkiness (2.0<bulkiness) ○: Good bulkiness (1.6≦bulkiness≦2.0) ×: Poor bulkiness (bulk degree <1.6).

[0069] I. Water absorption / diffusion and water repellency For the fabrics obtained in section H, the drop method described in JIS-L-1907:2010 was used to evaluate water absorption and diffusivity from the time it took for the water droplet to disappear from the surface of the fabric. Here, the water droplet disappearance time was determined by rounding off the average water droplet disappearance time of five measurements for each sample to the nearest whole number, and the water absorption and diffusivity was evaluated into three stages based on the following criteria. The average amount of water droplet was 0.040 mL, and the upper limit of the observation time was 300 seconds. A: Excellent water absorption and diffusion (water droplet disappearance time <15 seconds) B: Excellent water repellency (300 seconds < water droplet disappearance time) C: Poor water absorption / diffusion and water repellency (15 seconds≦water droplet disappearance time≦300 seconds).

[0070] J. Flexibility and texture evaluation A cylindrical knitted fabric sample made of the blended yarn was left in an atmosphere of 25°C x 55% RH for 24 hours or more, and then five testers evaluated the fabric by touch using the following evaluation criteria. The softness and texture were evaluated comprehensively on a four-point scale as shown below, and the average of the five testers was recorded as the texture evaluation result of the fabric. ◎: Excellent flexibility and texture. Good: Good flexibility and texture. △: Good flexibility, but poor feel. ×: Poor flexibility and texture.

[0071] [Example 1] Using the composite spinneret technology described in JP 2011-174215 A, a spinneret was designed and manufactured to form a fiber cross section (FIG. 4(a)) consisting of one large segment B (10 in FIG. 4) consisting of polymer B and 16 fine segments C (11 in FIG. 4) consisting of polymer C, around segment A (9 in FIG. 4) consisting of polymer A. The volume ratio of N6 / PET was adjusted to 70 / 30, with nylon 6 (N6, melt viscosity 190 Pa·s) as polymer A, and polyethylene terephthalate (PET, melt viscosity 120 Pa·s) as polymer B and polymer C, and the spinning temperature was 290°C, the total discharge amount was 32.4 g / min, and the spinning speed was 900 m / min. Next, the spinneret was set to 600 m / min between heating rollers set to 60°C and 110°C, and 3.3 times drawing was performed to obtain a drawn yarn of a splittable composite fiber of 108detx-72 filament.

[0072] The obtained splittable composite fiber was processed into a woven or knitted fabric, and then subjected to a scouring process, followed by treatment for 60 minutes in a bath heated to 130°C using the disperse dye Disperse Blue (5% owf), to obtain a fabric made of mixed yarn. The obtained mixed yarn was composed of three types of fibers (fiber A, fiber B, and fiber C) with different fiber diameters, and the variation in the presence index of each fiber was 20% or less, indicating that the mixed yarn was one in which each fiber was uniformly dispersed within the multifilament. The mixed yarn had an presence ratio R AB =1.0, abundance ratio R AC = 14.8, the fiber diameter ratio of fiber B to fiber A was 0.44, and the fiber diameter ratio of fiber C to fiber A was 0.10.

[0073] The woven fabric containing the blended yarn exhibited excellent bulkiness (bulk degree 2.2) because a bulky structure was formed by the ultrafine fiber (fiber C) due to the crosslinking structure by fiber B, and each yarn bundle maintained its bulky shape throughout the multifilament. Furthermore, the fabric exhibited excellent water absorption and diffusion properties (A, water droplet disappearance time 4 seconds) due to the capillary phenomenon resulting from the three-dimensional dense structure and the deformed shape of fiber A.

[0074] In addition, the knitted fabric made of the mixed yarn exhibited excellent flexibility derived from the ultrafine fibers because fiber C was uniformly dispersed on the surface and in the cross-sectional direction of the knitted fabric, and also had an excellent texture (◎) with moderate stiffness and a fine hair touch on the surface, and a glossy feel was observed. The results are shown in Table 1.

[0075] [ reference Examples 2 and 3] To obtain the fiber cross section shown in Figure 4(b), the nozzle hole arrangement was changed so that one segment B (10 in Figure 4) and four segments C (11 in Figure 4) were formed, and the total output rate was 32.4 g / min ( reference Example 2), total discharge rate 43.2g / min ( reference The procedure of Example 1 was repeated, except that the splittable composite fiber of Example 3 was obtained.

[0076] reference In Examples 2 and 3, by appropriately adjusting the ratio of fiber C and the fiber diameter, the fabric had the flexibility and water absorption and diffusion properties characteristic of ultrafine fibers, while also having excellent texture with volume and firmness, and furthermore, was less whitish and had excellent color development properties compared to Example 1. The results are shown in Table 2.

[0077] [Example 4] The procedure of Example 1 was repeated, except that the arrangement of the spinneret holes was changed so that 100 segments C were formed, and splittable conjugate fibers were obtained at a total throughput of 43.2 g / min.

[0078] In Example 4, it was confirmed that each fiber was present in a homogeneously dispersed state even when the ratio of fiber C was increased, and the characteristic texture derived from ultrafine fibers, such as softness, drapeability, and slimy feel, was also expressed compared to Example 1. The results are shown in Table 1.

[0079] [Comparative Example 1] Unlike the examples, each fiber obtained by spinning separately was mixed in a post-processing step by entangling or the like to produce a mixed fiber yarn.

[0080] First, the polymer was the above-mentioned N6 (polymer A in Example 1), and the polymer was wound at a spinning temperature of 290°C and a spinning speed of 900m / min using a normal spinneret with φ0.3 (L / D=1.5)-12 holes, and then drawn 3.3 times between heating rollers set at 60°C and 110°C at a drawing speed of 600m / min to obtain a 72dtex-18 filament N6 single yarn (fiber A). Next, the above-mentioned PET (polymer B in Example 1) was used as the undrawn yarn wound under the same conditions, and drawn 3.5 times between heating rollers set at 90°C and 110°C to obtain a 18dtex-18 filament PET single yarn (fiber B).

[0081] Furthermore, to obtain Fiber C, a conventionally known sea-island composite spinneret (number of islands per extrusion hole: 15) was used, and the above-mentioned PET (polymer B in Example 1) was used as the island component, and polyethylene terephthalate copolymerized with 8.0 mol % of 5-sodium sulfoisophthalic acid and 10 wt % of polyethylene glycol having a molecular weight of 1,000 (copolymerized PET, melt viscosity 121 Pa s) was used as the sea component in a volume ratio of PET / copolymerized PET = 70 / 30. The fibers were taken up at a spinning temperature of 290°C and a spinning speed of 900 m / min, and drawn 3.5 times between heating rollers set at 90°C and 130°C to obtain an islands-in-sea type composite fiber.

[0082] The collected single yarn and sea-island composite fiber were combined and fed to a roller equipped with a winder to obtain a post-mixed yarn. The post-mixed yarn was processed into a woven or knitted fabric, and then 99% or more of the sea component was dissolved and removed in a 1 wt% sodium hydroxide aqueous solution (bath ratio 1 / 100) heated to 90°C to obtain a mixed yarn containing fiber C. A fabric made of the mixed yarn was then collected under the conditions of Example 1.

[0083] The mixed yarn obtained had a variation in the presence index of fiber A and fiber B of 20% or more due to the post-mixing process, and it was confirmed that each fiber was present unevenly in the multifilament. In other words, fiber C was present in some places densely, and the effect unique to ultrafine fibers could not be exhibited. Therefore, the fabric made of the mixed yarn was inferior in bulkiness (bulkiness 1.4) compared to the product of the present invention, and the measurement variation in the water drop disappearance time was large, and it was evaluated as not exhibiting water absorption / diffusion properties and water repellency (C, water drop disappearance time 24 seconds). In addition, the texture was poor (×) due to uneven distribution of the fibers, and the color shade (streaks) was observed in the fabric parts, and the quality was also poor. The results are shown in Table 1.

[0084] [Comparative Example 2] The procedure of Example 1 was repeated, except that the arrangement of the spinneret holes was changed so that 300 segments C were formed, and splittable conjugate fibers were obtained at a total output rate of 33.6 g / min.

[0085] The fabric made of the obtained mixed yarn had inferior bulkiness compared to Example 1 due to the excessively high ratio of ultrafine fibers. In addition, the characteristics derived from the ultrafine fibers were more than necessary expressed, so the fabric was prone to sagging and the slimy feeling was emphasized, and the texture evaluation as a textile was inferior. The results are shown in Table 1.

[0086] [Example 5] The procedure of Example 1 was repeated, except that the arrangement of the spinneret holes was changed so that 3 segments B and 16 segments C were formed, and splittable conjugate fibers were obtained at a total throughput of 32.4 g / min. In Example 5, even when the ratio of fiber B was increased, it was confirmed that each fiber was present in a homogeneously dispersed state, and the fabric exhibited the properties of fiber A and fiber C sufficiently and had a good texture. The results are shown in Table 2.

[0087] [Comparative Example 3] The procedure of Example 1 was repeated, except that the arrangement of the spinneret holes was changed so that 10 segments B and 16 segments C were formed, and splittable conjugate fibers were obtained at a total output rate of 64.8 g / min.

[0088] In Comparative Example 3, the mechanical properties of the fabric, which are the property of Fiber A, could not be fully exhibited due to the presence of more than necessary Fiber B, and the fabric was evaluated to be inferior in fluffiness and firmness compared to Example 1. The results are shown in Table 2.

[0089] [Example 6] The procedure of Example 1 was repeated, except that polymer B and polymer C were changed to polypropylene terephthalate (PPT, melt viscosity 120 Pa·s), the spinning temperature was changed to 285°C, and splittable composite fibers were obtained.

[0090] In Example 6, due to the rubber elasticity of PPT, the fabric obtained not only had a more flexible feel, but also had a stretch function not seen in Example 1, making it a distinctive fabric. In addition, since PPT has a lower refractive index than PET, the fabric obtained also had excellent color development. The results are shown in Table 2.

[0091] [ reference Example 7] The same procedure as in Example 1 was repeated, except that polymer A was changed to PET, and polymer B and polymer C were changed to N6 to obtain splittable composite fibers.

[0092] reference In Example 7, Fiber A combined with the rigidity of PET and Fiber C combined with the flexibility of N6, resulting in a fabric that was soft yet had a moderate firmness compared to Example 1. The results are shown in Table 2.

[0093] [ reference Example 8] The procedure of Example 1 was repeated, except that polymer A was changed to polybutylene terephthalate (PBT, melt viscosity 130 Pa s), polymer B and polymer C were changed to polypropylene (PP, melt viscosity 70 Pa s), and the yarn was wound up at a spinning temperature of 270°C, a total output rate of 27.2 g / min, and a spinning speed of 1200 m / min, and then drawn 2.1 times between heated rollers set at 50°C and 90°C at a drawing speed of 600 m / min to obtain a drawn yarn of splittable composite fiber of 108detx-72 filament.

[0094] reference In Example 8, due to the characteristics of PP, the fabric obtained felt lightweight, and exhibited water repellency due to the fine uneven structure of the PP ultrafine fibers (B, water drop disappearance time of 300 seconds or more). The results are shown in Table 2. [Industrial Applicability]

[0095] In the fabric made of the mixed yarn of the present invention, the fiber C, i.e., the ultrafine fiber, is uniformly dispersed on the surface of the fabric and in the cross-sectional direction thereof, so that the properties derived from the ultrafine fiber can be fully exhibited without impairing the bulkiness. Therefore, it is expected to produce a characteristic texture and moderate fluffiness, and to be a natural cotton-like fabric with a unique touch that could not be achieved by conventional fabrics made of ultrafine fibers, and can be suitably used for a wide range of textile products, from general clothing such as jackets, skirts, pants, and underwear, to sports clothing, clothing materials, interior products such as carpets, sofas, and curtains, vehicle interior products such as car seats, cosmetics, cosmetic masks, wiping cloths, health products, and various filters for daily life purposes.

[0096] [Table 1]

[0097] [Table 2] [Explanation of symbols]

[0098] 1: Fiber diameter distribution of fiber A 2: Fiber diameter distribution of fiber B 3: Fiber diameter distribution of fiber C 4: Fiber A in multifilament 5: Fiber B in multifilament 6: Fiber C in multifilament 7: A perfect circle is drawn with fiber A in an arbitrarily selected multifilament as the center point, containing 5 to 10 fibers A. 8: Circumscribed circle of fiber A 9: Segment A 10: Segment B 11: Segment C

Claims

1. In a multifilament containing three types of fibers with different fiber diameters, the fiber with the largest fiber diameter (fiber A), the fiber with the medium fiber diameter (fiber B), and the fiber with the smallest fiber diameter (fiber C) are present uniformly without bias, and the abundance ratio R of fiber B to fiber A is ＡＢ is 1.0 to 3.0, and the abundance ratio R of fiber C to fiber A is ＡＣ a fiber diameter ratio of fiber B to fiber A is 0.25 or more and 0.60 or less, a fiber diameter ratio of fiber C to fiber A is 0.05 or more and 0.25 or less, a fiber diameter of fiber A is 7.5 μm or more and 25 μm or less, a fiber diameter of fiber C is 0.50 μm or more and 5.0 μm or less, and a non-circularity of fiber A is 1.2 or more and 2.0 or less.

2. A textile product comprising the blended yarn described in claim 1.

Images