JP2022056855A - Combined filament yarn - Google Patents

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

The present invention relates to a multifilament in which three types of fibers having different fiber diameters are mixed, and relates to a mixed fiber yarn suitable for obtaining a natural cotton-like fabric.

Synthetic fibers made of polyester, polyamide, etc. have excellent mechanical properties and dimensional stability, and are therefore widely used from clothing applications to non-clothing applications. However, in recent years when people's lives have diversified and people are demanding a better life, more advanced textures and functions are required for many uses such as clothing. Among them, "ultrafine fiber thinning" has a great effect on the characteristics of the fiber itself and the characteristics after being made into a fabric, and is one of the mainstream technologies for increasing the added value of the fiber from the viewpoint of controlling the cross-sectional shape of the fiber.

Fiber is a material with fine and long morphological characteristics, and its ultrafineness means that its properties are enhanced, specifically, the specific surface area, which is the surface area per weight, and the suppleness of the material are increased. do. For this reason, in addition to the soft texture, it has become a textile that appeals to the features unique to ultrafine fibers such as fine hair touch on the surface of the fabric and drapeability, and has been used as artificial leather and new tactile textiles for a relatively long time. It is also used for functional clothing such as windproof, water-absorbent, and water-repellent fabrics that utilize the form.

However, from the viewpoint of material mechanics, as the fiber diameter is reduced, the cross-sectional secondary moment (material rigidity) decreases in proportion to the fourth power of the fiber diameter, and the ultrafine fiber alone is tailored to fabric. When tailoring a textile, it is often made by mixing it with other fibers, because the elasticity and bulkiness of the fabric are reduced. Specifically, by using ultrafine fibers as a mixed yarn with multifilaments having different fineness, mechanical properties, and shrinkage characteristics, it is possible to obtain a fabric that has bulkiness and mechanical properties while taking advantage of the characteristics peculiar to ultrafine fibers. Is known to be possible.

Generally, a method of mixing fibers in the spinning / drawing process of a multifilament or a method of obtaining mixed yarns by high-order processing such as air entanglement or twisting is used. These manufacturing methods can be selected according to the expected form of the mixed fiber yarn, and can enable a fabric having various functions.

Patent Document 1 proposes an ultrafine mixed fiber yarn having a bulky and soft texture while having a fine fineness by mixing two types of fibers having different single yarn finenesses by air entanglement.

In Patent Document 2, a split fiber composite fiber and a polyester fiber having a high boiling water shrinkage rate of 5% or more are used as a different shrinkage mixed yarn, and then the split fiber composite fiber is split to generate ultrafine fibers. In addition, a mixed fiber false twisted yarn having an excellent texture and a natural heathered appearance has been proposed.

In Patent Document 3, in a mixed fiber of at least three types of filament yarns, low shrinkage ultrafine fibers are arranged on the surface of the mixed fiber yarn, and high shrinkage thick yarn is used as an inner layer and low shrinkage. By arranging the fineness yarns in the intermediate layer and the surface layer, a different fineness different shrinkage mixed yarns that enable a more functional fabric have been proposed.

JP-A-2010-196227 (Claims) JP-A-2005-290638 (Claims) Japanese Patent Application Laid-Open No. 10-212629 (Claims)

In Patent Document 1, yarns collected separately in post-processing are put into a mixed fiber state, and a two-layer structure yarn in which highly shrinkable fibers are arranged in a core portion and ultrafine fibers are arranged in a sheath portion is formed. The technical idea is that the fibers are unevenly distributed. In this case, the ultrafine fibers are mainly arranged on the surface of the fabric, and if the weaving structure is not devised, the ultrafine fibers arranged as the sheath portion may be unnecessarily fluffed due to excessive friction. Further, in the fiber existence form disclosed here, since the ultrafine fibers are densely present, there is a restriction on the development of the bulkiness of the entire yarn bundle, and the desired characteristics cannot be fully exhibited. In some cases.

In Patent Document 2, a mixed fiber of split fiber composite fiber and high shrinkage fiber is used, and ultrafine fibers are generated by split fiber treatment. However, the mixed fiber of these fibers is achieved by post-mixing such as false twisting and entanglement. As a result, the ultrafine fibers are partially and densely arranged, and further, the high shrinkage fibers are greatly contracted by the heat applied in the higher-order processing step, and are unevenly distributed toward the center of the yarn bundle. .. For this reason, the uneven distribution of the above-mentioned ultrafine fibers becomes more remarkable, and there are cases where the unique tactile sensation and texture woven by the mixed fiber yarn in which fibers having different fiber diameters are uniformly dispersed cannot be achieved.

The technical point of Patent Document 3 is that three or more types of filament yarns having different fineness, including ultrafine fibers, are mixed at a constant ratio. Due to this effect, the medium fineness yarns are present between the high fineness yarns in the yarn bundle, and the uneven distribution of the thick fineness yarns and the fine fineness yarns due to the shrinkage of the fibers that occurs during the higher processing process is suppressed. It aims at the effect. However, three or more types of yarn groups are manufactured separately and then finally mixed in a post-mixing step. For this reason, the uneven distribution of each thread group is not eliminated, and each thread group is partially densely arranged, resulting in an inhomogeneous dispersion state, maximizing the desired effect. It was not something that could be exhibited, and the appearance and feel of the surface may deteriorate.

As described above, it is difficult to say that the mixed fiber yarn in which the ultrafine fibers are mixed, which is achieved by the conventional technique, can fully exhibit the fabric characteristics unique to the ultrafine fibers due to the partial uneven distribution of the ultrafine fibers. There has been a demand for a mixed fiber yarn that realizes a fabric in which ultrafine fibers are uniformly and bulky in the multifilament, and the tactile sensation derived from the ultrafine fibers and the function by increasing the specific surface area are effectively exhibited.

The above-mentioned problems of the prior art are solved by the following. That is,
(1) In a multifilament in which three types of fibers having different fiber diameters are mixed, a fiber having the largest fiber diameter (fiber A), a fiber having an intermediate fiber diameter (fiber B), and a fiber having the smallest fiber diameter (fiber C). The abundance ratio R _AB of the fiber B to the fiber A is 1.0 to 3.0, and the abundance ratio R _AC of the fiber C to the fiber A is 3.0 to 100. Mixed fiber thread,
(2) The mixed fiber yarn according to (1), wherein the fiber diameter ratio of the fiber B to the fiber A is 0.60 or less, and the fiber diameter ratio of the fiber C to the fiber A is 0.25 or less.
(3) The mixed fiber yarn according to (1) or (2), wherein the degree of deformation of the fiber A is 1.2 or more.
(4) The mixed fiber yarn according to any one of (1) to (3), wherein the fiber A is a polyamide and the fiber B and the fiber C are polyester.
(5) A textile product made of the mixed yarn according to at least one of (1) to (4).
Is.

The mixed fiber yarn of the present invention has three types of fibers having different fiber diameters, that is, a fiber having the largest fiber diameter (fiber A), a fiber having an intermediate fiber diameter (fiber B), and a fiber having the smallest fiber diameter (fiber C). ) Is mixed, but each fiber exists in a homogeneously dispersed state. Therefore, in the fabric made of the mixed fiber yarn of the present invention, the fibers C, that is, the ultrafine fibers are uniformly dispersed even on the surface of the fabric and in the cross-sectional direction thereof. Uniqueness that could not be achieved with conventional fabrics made of ultrafine fibers, which can be exhibited without any problems, produce characteristic flexibility and texture, and have functionality such as excellent water absorption and diffusivity due to the dense structure woven by ultrafine fibers. It becomes a natural cotton-like fabric with the tactile sensation of.

It is a schematic diagram of an example of the fiber diameter distribution of the fiber constituting the mixed fiber yarn of this invention. It is a schematic diagram of the cross-sectional structure of the mixed fiber yarn of this invention. It is the schematic of the fiber cross section for demonstrating the degree of deformation of this invention. It is a schematic diagram of an example of the split type composite fiber suitable for obtaining the mixed fiber yarn of this invention.

Hereinafter, the present invention will be described together with desirable embodiments.

The mixed fiber yarn of the present invention refers to a multifilament in which three types of fibers having different fiber diameters are mixed, and is a fiber having the largest fiber diameter (fiber A), a fiber having an intermediate fiber diameter (fiber B), and a fiber diameter. It is necessary that the minimum fiber (fiber C) is uniformly and uniformly present, which is an important requirement in the present invention.

The "multifilament in which three types of fibers having different fiber diameters are mixed" in the present invention means that when the fiber diameter in the cross section of the mixed fiber yarn is measured, the horizontal axis is the fiber diameter and the vertical axis is the number of fibers. In the figure shown above, a state having three fiber diameter distributions (having three peaks) as illustrated in FIG. 1 is shown. Here, a group of fibers having a fiber diameter within the range (distribution width) of each distribution is regarded as one type, and the existence of three fiber diameter distributions means that the three types of fibers having different fiber diameters in the present invention are present. It means that is mixed.

The fiber diameter referred to here is obtained as follows. That is, a magnification in which 50 or more fibers can be observed with a scanning electron microscope (SEM) in a cross section of a cloth in which a mixed fiber yarn is embedded with an embedding agent such as an epoxy resin or a fabric composed of the mixed fiber yarn. Take an image as. The cross-sectional area of 50 fibers randomly selected from the photographed image of the cross section of the mixed fiber yarn is measured. The cross-sectional area referred to here means the area of the cut surface, with the cross section in the direction perpendicular to the fiber axis as the cut surface from the image taken two-dimensionally. 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 off to the second decimal place in μm units. The above operation was performed on 10 images taken in the same manner, and the simple number average value of the evaluation results of the 10 images was taken as the fiber diameter.

Further, the distribution width of the fiber diameter means a range of ± 30% of the fiber diameter (peak value) having the largest number in each fiber group. In the distribution width, from the viewpoint of improving the quality as a textile product, it is preferable that each fiber group is distributed in the range of the peak value ± 20%, and further distributed in the range of the peak value ± 10%. It is more preferable to be there. Further, in order to make the object of the present invention more effective, it is preferable that each fiber diameter distribution is discontinuous and has an independent distribution.

In order to achieve the object of the present invention, the fibers having the three different diameters as described above are the fiber having the largest fiber diameter (fiber A) and the fiber having an intermediate fiber diameter in the same cross section of the multifilament (fiber A). It is important that the fiber B) and the fiber having the smallest fiber diameter (fiber C) are uniformly and uniformly present.

The term "exists uniformly and uniformly" here means that the existence index variation (existence index CV%) defined by the following formula is 20% or less for the fibers A, B, and C. Is.
Existence index variation = (standard deviation of existence index / existence index) x 100 (%)
Here, the existence index is obtained as follows. An image is taken with a scanning electron microscope (SEM) at a magnification at which 10 or more fibers A can be observed in the cross section of the mixed fiber yarn or the cloth composed of the mixed fiber yarn. As shown in FIG. 2 as an example of an image taken two-dimensionally, one fiber A (4 in FIG. 2) was randomly extracted ((1) in FIG. 2), and the extracted fiber A was extracted. Draw a perfect circle so that 10 fibers A are included from the center point of the circle (broken line 7 in FIG. 2), and the fibers A and B (5 in FIG. 2) existing inside the perfect circle and the fiber C (5 in FIG. 2) are drawn. The number of fibers 6) in FIG. 2 is counted, and the ratio of the number of each of the fibers A, B, and C to the total number of fibers existing in the perfect circle is used as the existence index. At this time, if the inside of the perfect circle contains more than 1/2 of the cross-sectional area of the fiber, it is counted as one fiber. This value was evaluated for 20 images taken in the same manner, the average value was evaluated as the presence index, and the homogeneity of each fiber contained in the mixed fiber yarn was evaluated from the variation in the presence index.

If the variation in the presence index referred to here is 20% or less in all of the fibers A, B, and C, it is determined that each fiber present in the mixed fiber yarn is substantially uniformly and uniformly present. Therefore, in view of the object of the present invention, it has been found that it is an important factor to set the range of the existence index variation of each fiber. Within this range, in the fabric made of the mixed yarn of the present invention, the fibers C, that is, the ultrafine fibers are uniformly dispersed even on the surface of the fabric and in the cross-sectional direction thereof, so that the fibers are derived from the ultrafine fibers without impairing the bulkiness. It is possible to demonstrate the unique texture and texture of. Furthermore, from the viewpoint of suppressing the uneven distribution of fibers caused by heat shrinkage in the higher-order processing step, it is effective that the fibers B are homogeneously dispersed in the multifilament, and the fibers A are particularly high. When contracted fibers are used, it is possible to exhibit more remarkable bulkiness.

From the viewpoint of making the functions of the ultrafine fibers more remarkable, it is preferable that each fiber is homogeneously dispersed in the multifilament, so that the abundance index variation of each fiber is preferably 15% or less, and more preferably. 10% or less is mentioned as a preferable range.

Further, since the mixed fiber yarn of the present invention effectively exerts the role played by each fiber, the abundance ratio of the fiber B to the fiber A is _1.0 to 3.0, and the abundance ratio of the fiber C to the fiber A is 1.0 to 3.0. It is a requirement that R _AC satisfies 3.0 to 100.

The abundance ratio here is defined by the following formula.
_RAB = (Fiber B presence index) / (Fiber A presence index)
R _AC = (absence index of fiber C) / (presence index of fiber A)
The fiber B in the present invention is indispensable for maintaining a homogeneous mixed fiber state in the multifilament, and the three types of fibers are evenly arranged while maintaining the bulky morphology of the yarn bundle. Has a role to play.

That is, for example, the fiber of the present invention undergoes processing such as weaving and knitting, becomes a fabric, and then undergoes higher-order processing under various dry heat or wet heat conditions. At this time, each fiber shrinks according to the characteristics of each thread, but when three types of fibers are non-uniformly present or composed of two types of fibers, the shrinkage of thick fibers occurs. , Other fibers will be pulled and the bias of the fibers will be promoted.

In the case of the fiber of the present invention, the fiber B having an intermediate fiber diameter is evenly arranged in the yarn bundle. In particular, when the abundance ratio _RAB of the fiber B to the fiber A in the yarn bundle is within the above-mentioned range, the fiber B acts as a bridge between the fiber A and the fiber C, so that the fiber A becomes a bridge. The movement toward the center of the yarn bundle caused by the contraction is greatly suppressed, and while being supported by the fiber B, the state of floating on the surface of the yarn bundle is maintained, so that a bulky structure made of ultrafine fibers is formed. The flexibility and texture peculiar to ultrafine fibers can be effectively expressed. In the bridge structure made of the fibers B, even in the entire multifilament, even if each yarn bundle is bulky and the morphology is maintained, the fibers are less likely to be biased, and the appearance and feel of the fabric made of the multifilament are very good. Make it excellent.

It is a feature of the present invention that this state is maintained, but the present invention preferably has a state in which at least one fiber B is present between two adjacent fibers A in the mixed fiber yarn. The lower limit of the abundance ratio _RAB in the above is 1.0, and the practical upper limit of the abundance ratio _RAB is 3.0 as the range in which the effects of the fibers A and the fiber B work predominantly.

Further, in the mixed fiber yarn of the present invention, if the abundance ratio _RAC of the fiber C to the fiber A is within the above-mentioned range, the fabric can predominantly exert the specific surface area effect produced by the fiber C, that is, the ultrafine fiber. It can be expected to exhibit excellent characteristics such as drape. That is, it is preferable that the larger the abundance ratio is, the more remarkable the characteristics derived from the ultrafine fibers are exhibited, but from the viewpoint of bulkiness and mechanical properties as a fabric, the upper limit of the abundance ratio _RAC is set to 100. .. Further, in the present invention, the lower limit of the abundance ratio _RAC is set to 3.0 as the range in which the effect peculiar to the ultrafine fiber works predominantly.

When a mixed fiber yarn satisfying the above requirements is used as a fabric such as a woven or knitted fabric, the fibers having different fiber diameters are uniformly dispersed, ensuring suitable bulkiness and peculiar to ultrafine fibers. It effectively expresses flexibility, texture, and appropriate fluffiness, and can be a natural fabric that has never existed before.

Next, in the mixed fiber yarn of the present invention, it is preferable that the fiber diameter ratio of the fiber B to the fiber A is 0.60 or less and the fiber diameter ratio of the fiber C to the fiber A is 0.25 or less.

An object of the present invention is to obtain a mixed fiber yarn having an excellent feel and texture peculiar to ultrafine fibers or a fabric made of the mixed fiber yarn thereof, and in order to more efficiently exert the effect of the present invention, the fiber A It is preferable that the fiber diameter ratio of the fiber B and the fiber C to the above range is within the above range.

In the mixed fiber yarn of the present invention, the fiber A and the fiber C are responsible for the tactile sensation and texture of the fabric made of the mixed fiber yarn. The fiber diameter ratio of the fiber B to the fiber A is preferably 0.60 or less. However, if the fiber diameter of the fiber B becomes excessively small, the rigidity of the fiber B decreases, and localization due to shrinkage of the fiber A forming the skeleton of the mixed fiber yarn may occur in a part of the textile. Therefore, in the present invention, the lower limit of the fiber diameter ratio of the fiber B to the fiber A is preferably 0.25.

Further, in order to more efficiently utilize the unique and excellent texture of the ultrafine fiber, which is the object of the present invention, the fiber diameter ratio of the fiber C to the fiber A is 0.25 or less as a preferable range. .. On the other hand, if the fiber diameter of the fiber C becomes too small, the fabric becomes excessively flexible. Therefore, from the viewpoint of suppressing the sagging of the textile and maintaining the swelling feeling, it is preferable that the lower limit of the fiber diameter ratio of the fiber C to the fiber A is 0.05 in the present invention.

The ultrafine fiber referred to here needs to be on the order of microns or less in order to efficiently exert the effect expected in the present invention, and in the present invention, if the fiber diameter of the fiber C is 5 μm or less, it is used as a woven fabric. It is preferable from the viewpoint of texture and functionality. From the viewpoint of making the functions peculiar to the ultrafine fibers more remarkable, it is preferable that the fiber diameter is small, but considering the development as a textile, the cloth containing the ultrafine fibers is white due to diffuse reflection or passage of light on the surface of the ultrafine fibers. Since blurring and lack of color development may occur, the fiber diameter of the fiber C is preferably 0.50 μm or more from the viewpoint of ensuring color development.

The fiber A in the mixed fiber yarn of the present invention is expected to play a role of playing a role of a mechanical property and elasticity of a cloth made of the mixed fiber yarn and the mixed fiber yarn. Focusing on the moment of inertia of area, which is an index of the rigidity of the material, the moment of inertia of area is proportional to the fourth power of the fiber diameter. This is because it exists as a skeleton in the fiber thread. From the above viewpoint, the fiber diameter of the fiber A is 7.5 μm or more, which is preferable because it can exhibit sufficient rigidity as a fabric. On the other hand, if the fiber diameter of the fiber A is too large, the rigidity of the entire mixed fiber yarn becomes higher than necessary, and the excellent flexibility of the ultrafine fiber may not be fully utilized. It is preferably 25 μm or less.

As it is generally known that a fiber having a modified cross section produces rigidity and a glossy feeling, the fiber A in the mixed fiber yarn of the present invention is no exception, and a fabric having a modified cross section is used. It is possible to improve the quality of the fabric such as elasticity and luster. In particular, if the fiber A has a deformed cross section with recesses, it is possible to create appropriate voids between the fibers, and the capillary phenomenon is effective in combination with the dense structure woven by arranging the ultrafine fibers three-dimensionally evenly. It is mentioned as a preferable shape because it is possible to exert functionality such as water absorption and diffusivity by acting in a positive manner. From such a viewpoint, the degree of deformation of the fiber A in the mixed yarn of the present invention is preferably 1.2 or more. Within such a range, it is possible to exhibit specific properties according to the degree of deformation, and it is possible to obtain a unique fabric that has never existed in the past. The upper limit of the degree of deformation is set to 2.0 from the viewpoint of not impairing the flexibility which is the object of the present invention and the stability of the cross-sectional shape in higher-order machining.

The degree of deformation referred to here is determined according to the method illustrated in FIG. The cross section of the cloth made of the mixed yarn and the mixed yarn is photographed two-dimensionally by the same method as the evaluation of the existence index. For the five fibers A arbitrarily extracted from the image, the perfect circle (broken line 8 in FIG. 3) that circumscribes most to the tip of the convex portion on the outer circumference of the fiber A is defined as the circumscribed circle. _Let the diameter be L1. Next, the distance from the circumscribed circle to the deepest part of the recess in the cross section of the fiber A is measured, and the value is set to L ₂ , and the degree of deformation = L ₁ / (L ₁ to L ₂ ) to the third decimal place is obtained. The degree of irregularity is the value rounded to the third decimal place. The degree of deformation was evaluated for 20 images taken in the same manner, and the value obtained by rounding off the second decimal place of the simple average value was defined as the degree of deformation.

The polymer constituting the mixed fiber yarn of the present invention is, for example, polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polytrimethylene terephthalate, polypropylene, polyolefin, polycarbonate, polyacrylate, polyamide, polylactic acid, thermoplastic polyurethane, polyphenylene sulfide. The polymer is not limited as long as it is a melt-moldable polymer such as, and a copolymer thereof, but from the viewpoint of the object effect of the present invention, the fiber A is composed of polyamide, and the fibers B and C are composed of polyester. Is mentioned as a preferred polymer combination.

The polyamide referred to here is preferably polycaproamide (nylon 6) or polyhexamethylene adipamide (nylon 66), which has excellent mechanical properties and is easy to develop as a textile, and is less likely to cause gelation during the yarn making process. Polycaproamide (nylon 6) is more preferable from the viewpoint of excellent yarn-making property. Other components include, for example, polydodecanoamide, polyhexamethylene adipamide, polyhexamethylene azelamide, polyhexamethylene sevacamide, polyhexamethylene dodecanoamide, polyhexamethylene adipamide, and polyhexamethylene. Examples thereof include terephthalamide and polyhexamethylene isophthalamide. Polyamide generally has a low elastic modulus of about half or less, which is an index of softness as a polymer property, as compared with polyester, and from the viewpoint of flexibility, which is one of the appealing points of the present invention, fiber A Is preferably selected from these polymers.

On the other hand, the polyester referred to here is preferably selected from polyesters such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, and polytrimethylene terephthalate and their copolymers as a preferable example. From the viewpoint of exhibiting appropriate elasticity while having flexibility, which is the object of the present invention, it is preferable that the fibers B and C are polyesters having excellent rigidity.

In addition, regarding these polymers, if necessary, inorganic substances such as titanium oxide, silica, barium oxide, carbon black, colorants such as dyes and pigments, flame retardants, fluorescent whitening agents, antioxidants, ultraviolet absorbers, etc. The various additives of the above may be contained in the polymer as long as the object of the present invention is not impaired.

Assuming that the mixed fiber yarn of the present invention is a textile product constituting at least a part of the fiber product, the fibers having different fiber diameters are present in a uniformly dispersed state, thereby ensuring suitable bulkiness and flexibility peculiar to ultrafine fibers. It can be suitably used as a new tactile textile that effectively expresses texture, texture, and appropriate fluffiness. Furthermore, due to the dense structure woven by arranging the ultrafine fibers evenly in three dimensions, excellent water absorption and diffusivity is exhibited by the effective action of capillarity, and the surface is fine by applying water repellent treatment. Since excellent water repellency can be expected in combination with the uneven structure, the mixed fiber yarn of the present invention can be used for general clothing such as jackets, skirts, pants and underwear, as well as interior products such as sports clothing, clothing materials, carpets, sofas and curtains. , Car seats and other vehicle interiors, cosmetics, cosmetic masks, wiping cloths, health products, various filters and other daily uses, etc., can be suitably used for a wide range of textile products.

An example of the method for producing a mixed fiber yarn of the present invention will be described in detail below.

As a method for obtaining the mixed fiber yarn of the present invention, a melt spinning method for producing long fibers, a solution spinning method such as wet and dry wet, a melt blow method and a spunbond method suitable for obtaining a sheet-shaped fiber structure. Although it can be manufactured by the above method, the melt spinning method is preferable from the viewpoint of increasing productivity.

As a method for producing the mixed fiber of the present invention, a spinning mixed fiber method in which fibers having different fiber diameters separately discharged from the ejection holes of the mouthpiece at the time of spinning are simultaneously taken up, or each fiber obtained by spinning separately is used. There are various methods such as a post-mixing method in which fibers are mixed by entanglement in the post-processing process, but from the viewpoint of mixing fibers with different fiber diameters in a multifilament in a homogeneously dispersed state, the cross section of the fiber Three types of segments having different sizes (segment A (9 in FIG. 4) existing continuously, segment B having a large area (10 in FIG. 4), as shown in the cross-sectional view illustrated in FIG. 4 as an example). Most preferably, it is produced by using a split-type composite fiber having a core-sheath structure, which is composed of a segment C (11 in FIG. 4) having a small area. That is, by selecting split type composite fibers in which polymers are alternately arranged on the fiber surface layer, between segment A and segment B and between segment A and segment C due to heat and physical impact force in the higher processing process. In this case, peeling and splitting are caused, and fibers B and C are arranged in the circumferential shape of one fiber A by the number of segments. Therefore, by applying the multifilament of the split type composite fiber, the present invention is made. It is possible to achieve the mixed fiber yarn of.

The split type composite fiber suitable for obtaining the mixed fiber yarn of the present invention has an area in which the average area of segment B is three times or more the average area of segment C in the fiber cross section in the direction perpendicular to the fiber axis. preferable. As illustrated in FIG. 4, having a segment having a large area such as segment B causes asymmetry in the fiber cross section, makes it difficult for stress during division to be dispersed, and facilitates division by heat treatment or physical impact. It becomes. Further, since the area of the segment B is 2.0 times or more the average area of the segment C, the stress at the time of division is likely to be applied to the segment B, and the segment B is preferentially removed so that it can move in the fiber cross section. A space is created, and the segment C has a structure that is easily peeled off. In this way, the existence of three types of segments with different sizes ensures good passability in the processing process, while peeling and splitting in higher-order processing processes such as scouring and dyeing where heat and physical impact are applied. The mixed fiber yarn of the present invention can be easily obtained by exhibiting the properties.

In view of the above-mentioned division mechanism, from the viewpoint of promoting exfoliation division, a combination of different polymers is preferable, and a combination of polymers having different heat shrinkage characteristics is preferable.

The polymer constituting the split type composite fiber suitable for obtaining the mixed fiber yarn of the present invention is not particularly limited as long as it is used for producing a general synthetic fiber, and polyester, polyamide, polyolefin, etc. Examples thereof include acrylic, but in order to promote peeling and division at the interface of the segment, it is preferable to use a combination of polymers having low affinity between adjacent segments (segment A / segment B and segment A / segment C). For example, a combination of polyester and polyamide, polyester and polyolefin, and polyolefin and polyamide is exemplified. Examples of the polyester include polyethylene terephthalate, polybutylene terephthalate, polypropylene terephthalate and a copolymer thereof. Examples of the polyamide include nylon 6, nylon 66, nylon 46, nylon 11, nylon 12, and copolymers thereof. Examples of the polyolefin include polypropylene, polyethylene, polymethylpentene ribten, and copolymers thereof. The combination of the polymers of segment B and segment C is not particularly limited, but is preferably selected from polyester and polyamide from the viewpoint of development into textiles. Further, these polymers are inorganic substances such as titanium oxide, silica and barium oxide, carbon black, colorants such as dyes and pigments, flame retardants, fluorescent whitening agents and antioxidants, as long as the object of the present invention is not impaired. Alternatively, various additives such as an ultraviolet absorber may be contained in the polymer.

The base used for producing the split type composite fiber suitable for obtaining the mixed fiber yarn of the present invention by the melt spinning method is appropriately selected from those capable of combining two or more components of a polymer. From the viewpoint of precisely controlling the desired number of segments and the size of the polymer having a plurality of components, the composite base described in Japanese Patent Application Laid-Open No. 2011-174215 is preferably used. Since the cross-sectional shape can be accurately formed by using this composite spinneret, it is possible to control the shape, size, arrangement, etc. of each segment in the fiber cross section, and therefore it is preferable to select the base. That is.

In the case of producing a split type composite fiber suitable for obtaining the mixed fiber yarn of the present invention, the spinning temperature is mainly determined by the polymer used having a high melting point or a high viscosity among the polymers used determined from the above-mentioned viewpoints. It is preferable to set the temperature as shown. The temperature indicating this fluidity varies depending on the polymer characteristics and its molecular weight, but the melting point of the polymer is a guide and may be set at a melting point of + 60 ° C. or lower. When the temperature is lower than this, the polymer is not thermally decomposed in the spinning head or the spinning pack, the decrease in molecular weight is suppressed, and the split type composite fiber can be satisfactorily produced. The amount of the polymer discharged at this time may be 0.1 g / min / hole to 20.0 g / min / hole per discharge hole as a range in which melt discharge can be performed while maintaining stability. At this time, it is preferable to consider the pressure loss in the discharge hole that can ensure the stability of the discharge. The pressure loss here is preferably determined from the range of the discharge amount in relation to the melt viscosity of the polymer, the discharge hole diameter, and the discharge hole length, with 0.1 MPa to 40 MPa as a guide.

The ratio of the core component (segment A) and the sheath component (segment B + segment C) when spinning the split type composite fiber suitable for obtaining the mixed fiber yarn of the present invention is the core / by weight ratio based on the discharge amount. The sheath ratio can be selected in the range of 5/95 to 95/5. From the viewpoint of stable production of the split type composite fiber and long-term stability of the split type composite cross section, the core / sheath ratio is preferably in the range of 40/60 to 80/20.

The composite polymer flow flowing through the spinning pack and discharged from the mouthpiece is cooled and solidified, and then oiled and taken up by a roller having a regulated peripheral speed to obtain composite fibers. This take-up speed is preferably about 500 to 6000 m / min, and can be changed depending on the physical characteristics of the polymer and the purpose of use of the fiber. In particular, from the viewpoint of high orientation and improvement of mechanical properties, it is preferable to set the fiber at 500 to 4000 m / min and then stretch the fiber because the uniaxial orientation of the fiber can be promoted. At the time of stretching, it is preferable to appropriately set the preheating temperature by using a temperature at which softening is possible, such as the glass transition temperature of the polymer, as a guide. The upper limit of the preheating temperature is preferably a temperature at which the yarn path disorder does not occur due to the spontaneous elongation of the fibers in the preheating process.

The mixed fiber yarn of the present invention can be produced by subjecting the split type composite fiber obtained as described above to heat treatment or physical impact. It is also possible to obtain mixed yarn by weight loss treatment with a solvent or the like or by utilizing the difference in solvent swelling of the polymer, but from the viewpoint of omitting the manufacturing process and promoting cost reduction, the difference in heat shrinkage It can be said that the method of using or using physical impact is preferable. At this time, the split type composite fiber may be woven and knitted in advance as a mixed fiber yarn, or the split type composite fiber may be woven and knitted and then subjected to high-order processing steps such as scouring and dyeing to form a fabric made of the mixed fiber yarn.

Hereinafter, the mixed yarn of the present invention will be specifically described with reference to Examples. Melt Viscosity of Polymer The chip-shaped polymer was measured with a water content of 200 ppm or less by a vacuum dryer, and the strain rate was changed stepwise by Capillograph 1B manufactured by Toyo Seiki Co., Ltd. to measure the melt viscosity. The measured temperature is the same as the spinning temperature, and the melt viscosity at 1216s ^-1 is described in Examples or Comparative Examples. By the way, it took 5 minutes from the time when the sample was put into the heating furnace to the start of the measurement, and the measurement was performed in a nitrogen atmosphere.

B. Melting point of polymer The chip-shaped polymer has a moisture content of 200 ppm or less by a vacuum dryer, weighs about 5 mg, and rises from 0 ° C to 300 ° C using a TA Instrument differential scanning calorimetry (DSC) Q2000 type. After raising the temperature at a temperature rate of 16 ° C./min, the temperature was maintained at 300 ° C. for 5 minutes for DSC measurement. The melting point was calculated from the melting peak observed during the heating process. The measurement was performed 3 times per sample, and the average value was taken as the melting point. When a plurality of melting peaks were observed, the melting peak top on the highest temperature side was taken as the melting point.

C. The weight of the multifilament having a fineness of 100 m was measured, and the value was multiplied by 100 to calculate the value. This operation was repeated 10 times, and the value obtained by rounding off the second decimal place of the average value was taken as the fineness (dtex) of the multifilament.

D. Fiber diameter 50 or more fibers can be observed with a scanning electron microscope (SEM) manufactured by HITACHI in the cross section of a fabric composed of mixed yarn or a mixed yarn embedded with an embedding agent such as epoxy resin. Take an image as a possible magnification. The cross-sectional area of each of the 50 fibers randomly extracted from the photographed image of the cross-section of the mixed fiber yarn is measured using image processing software (WINROOF). The cross-sectional area referred to here means the area of the cut surface, with the cross section in the direction perpendicular to the fiber axis as the cut surface from the image taken two-dimensionally. 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 off to the second decimal place in μm units. The above operation was performed on 10 images taken in the same manner, and a simple number average value of the evaluation results of the 10 images was taken as the fiber diameter of each fiber.

E. Presence index, presence index variation An image is taken of the cross section of the fabric composed of the mixed yarn or the mixed yarn at a magnification at which 10 or more fibers A can be observed with a scanning electron microscope (SEM) manufactured by HITACHI. One fiber A is randomly extracted from the image taken two-dimensionally, and a perfect circle is drawn so that 10 fibers A are included from the center point of the extracted fiber A (broken line 7 in FIG. 2). , The number of fibers A, B, and C existing inside the perfect circle is counted. The ratio of the number of each of the fibers A, B, and C to the total number of fibers existing in the perfect circle was evaluated as the existence index. At this time, if 1/2 or more of the fibers are contained inside the perfect circle, the number is counted as one fiber. This value is evaluated for 20 images taken in the same manner, and the following formula Existence index variation = (standard deviation of existence index / average value of existence index) × 100 (%)
The existence index variation was calculated by.

F. From the abundance index evaluated in the abundance E term, the abundance ratio R _AB of the fiber B to the fiber A and the abundance ratio R _AC of the fiber C to the fiber A are calculated by the following formula R _AB = (abundance index of the fiber B) / (abundance index of the fiber A). Existence index)
R _AC = (absence index of fiber C) / (presence index of fiber A)
It is defined in.

G. Degree of Deformity of Fiber A A perfect circle (in FIG. 3) that circumscribes most of the five fibers A arbitrarily extracted from the image taken in the E term to the tip of the convex portion on the outer circumference of the fiber A using image processing software. The broken line ₈ ) is the circumscribed circle, and its diameter is L1. Next, the distance from the circumscribed circle to the deepest part of the recess in the cross section of the fiber A is measured, and the value is set to L ₂ , and the degree of deformation = L ₁ / (L ₁ to L ₂ ) to the third decimal place is obtained. The degree of irregularity is the value rounded to the third decimal place. The degree of deformation was evaluated for 20 images taken in the same manner, and the value obtained by rounding off the second decimal place of the simple average value was defined as the degree of deformation.

H. An evaluation was carried out on a woven fabric in which a bulky warp is generally used and a round cross section N6 single yarn (56detx-40 filament) and a warp and weft are composed of a mixed yarn. The woven fabric referred to here was woven into a 1/3 twill structure by adjusting the number of fibers so that the cover factor (CFA) in the warp direction was 1000 and the cover factor (CFB) in the weft direction was 1200. However, with CFA and CFB, the warp and weft density of the woven fabric is measured in a section of 2.54 cm according to JIS-L-1096: 2010 8.6.1, and CFA = warp density × (fineness of warp). ) ^1/2 , CFB = weft density × (fineness of weft) ^1/2 formula.

The bulk height of the dyed woven fabric was calculated by the following formula, and the woven fabric rounded to the third decimal place was evaluated as the bulk height.
Bulk altitude B _u (cm ³ / g) = t / w × 1000
In the formula, t is the thickness of the woven fabric (mm), and w is the basis weight of the woven fabric (g / m ² ).

Here, the thickness was set according to the method A (JIS method) described in JIS-L-1096: 2010. That is, the thickness (mm) is measured at 5 different points of the sample using a thickness measuring device for a certain period of time and under a constant pressure, the average value is calculated, and the third decimal place is rounded off to the thickness (thickness). mm). The constant pressure at the time of measurement was 23.5 Kpa.

The basis weight was determined according to the method A (JIS method) described in JIS-L-1096: 2010. That is, two 20 cm × 20 cm test pieces were collected, the mass (g) in each standard state was measured, the mass per 1 m ² (g / m ² ) was obtained by the following formula, and the average value was calculated. , The second decimal place was rounded off to give a basis weight (g / m ² ).

From the bulk altitude obtained as described above, the bulkiness was determined in three stages based on the following criteria.
⊚: Excellent bulkiness (2.0 <bulk altitude)
◯: Good bulkiness (1.6 ≤ bulk altitude ≤ 2.0)
X: Inferior in bulkiness (bulk altitude <1.6).

I. The woven fabric obtained in the water absorption diffusivity / water repellency section H was carried out according to the dropping method described in JIS-L-1907: 2010, and the water absorption diffusivity was evaluated from the time at which the water droplets disappeared on the surface of the woven fabric. Here, the water droplet disappearance time was set to a value rounded off to the first decimal place of the average value of the water droplet disappearance time measured 5 times for each sample, and the water absorption diffusivity was determined in 3 stages based on the following criteria. The average amount of one water drop was 0.040 mL, and the upper limit of the observation time was 300 seconds.
A: Excellent water absorption and diffusivity (water droplet disappearance time <15 seconds)
B: Excellent water repellency (300 seconds <water droplet disappearance time)
C: Poor in water absorption and diffusivity and water repellency (15 seconds ≤ water droplet disappearance time ≤ 300 seconds).

J. Flexibility / Texture Evaluation After leaving a tubular knitted fabric sample made of mixed yarn in an atmosphere of 25 ° C x 55% RH for 24 hours or more, five testers performed tactile judgment according to the following evaluation criteria. From the viewpoint of flexibility and texture, the evaluation was made comprehensively on the following four stages, and the average of 5 people was used as the texture evaluation result of the fabric.
◎: I feel excellent flexibility and texture.
◯: Good flexibility and texture.
Δ: The flexibility is good, but the texture is inferior.
×: Inferior in flexibility and texture.

[Example 1]
Using the technique of the composite base described in JP-A-2011-174215, one large segment B made of polymer B (10 in FIG. 4) is surrounded by a segment A made of polymer A (9 in FIG. 4). ) And a polymer using a base designed and manufactured to form a fiber cross section (FIG. 4 (a)) composed of 16 fine segments C (11 in FIG. 4) composed of polymer C. Nylon 6 (N6, melt viscosity 190 Pa · s) as A, polyethylene terephthalate (PET, melt viscosity 120 Pa · s) as polymer B and polymer C, and the volume ratio was adjusted to N6 / PET = 70/30. The film was wound at a spinning temperature of 290 ° C., a total discharge rate of 32.4 g / min, and a spinning speed of 900 m / min. Next, the drawing speed was set to 600 m / min between the heating rollers set at 60 ° C. and 110 ° C., and 3.3 times stretching was carried out to collect drawn yarns of split type composite fibers of 108 detx-72 filaments.

The obtained split-type composite fiber is processed into a woven or knitted fabric, and after a refining step, it is treated with a disperse dye Disperse Blue (5% owf) for 60 minutes in a bath heated to 130 ° C. A fabric made of the same material was collected. The obtained mixed fiber yarn was composed of three types of fibers (fiber A, fiber B, and fiber C) having different fiber diameters, and the presence index variation of any of the fibers was 20% or less. It was a mixed fiber yarn in which each fiber was uniformly dispersed in the filament. In the mixed yarn, the abundance ratio R _AB = 1.0, the abundance ratio R _AC = 14.8, the fiber diameter ratio of the fiber B to the fiber A is 0.44, and the fiber diameter ratio of the fiber C to the fiber A is 0. It was 10.

In the woven fabric containing the mixed fiber yarn, a bulky structure is formed by the ultrafine fibers (fiber C) due to the bridging structure by the fiber B, and each yarn bundle is maintained in a bulky shape even in the entire multifilament. Therefore, it showed excellent bulkiness (bulk height 2.2). Furthermore, due to the three-dimensional dense structure and the capillary phenomenon derived from the deformation of the fiber A, it exhibited excellent water absorption and diffusivity (A, water droplet disappearance time 4 seconds).

Further, in the knitted fabric made of the mixed yarn, since the fiber C is in a homogeneously dispersed state on the surface of the knitted fabric and its cross-sectional direction, it exhibits excellent flexibility derived from the ultrafine fibers, and has appropriate elasticity and fine hair touch on the surface. It was a fabric that had properties and exhibited an excellent texture (⊚), and a glossy feeling was also observed. The results are shown in Table 1.

[Examples 2 and 3]
The arrangement of the base holes was changed so that one segment B (10 in FIG. 4) and four segments C (11 in FIG. 4) were formed so as to have the fiber cross section shown in FIG. 4 (b). This was carried out according to Example 1 except that the split type composite fibers having a total discharge amount of 32.4 g / min (Example 2) and a total discharge amount of 43.2 g / min (Example 3) were collected.

In Examples 2 and 3, by appropriately adjusting the abundance ratio of the fiber C and the fiber diameter, the texture having swelling and elasticity was excellent while having the flexibility and water absorption / diffusibility peculiar to the ultrafine fiber. Furthermore, the whitishness was reduced and the color development was excellent as compared with Example 1. The results are shown in Table 2.

[Example 4]
The procedure was carried out according to Example 1 except that the arrangement of the base holes was changed so that 100 segments C were formed and the split type composite fibers having a total discharge amount of 43.2 g / min were collected.

In Example 4, it was confirmed that each fiber existed in a uniformly dispersed state even when the abundance ratio of the fiber C increased, and as compared with Example 1, flexibility, drapeability, slimy feeling, etc. were obtained. The characteristic texture derived from ultrafine fibers was also exhibited. The results are shown in Table 1.

[Comparative Example 1]
Unlike the examples, the fibers obtained by spinning separately were mixed by entanglement or the like in the post-processing step, and the mixed fiber was produced by the post-mixed fiber.

First, the above-mentioned N6 (polymer A of Example 1) is used as the polymer, and a spinning temperature of 290 ° C. and a spinning speed of 900 m / using a normal base of φ0.3 (L / D = 1.5) -12 hole. The N6 single yarn (fiber A) of 72dtex-18 filament was obtained by winding at min, setting the drawing speed to 600 m / min between heating rollers set at 60 ° C. and 110 ° C., and performing 3.3 times stretching. rice field. Next, with respect to the above-mentioned PET (Polymer B of Example 1), the undrawn yarn wound under the same conditions was stretched 3.5 times between heating rollers set at 90 ° C. and 110 ° C., and 18dtex-. An 18-filament PET single yarn (fiber B) was obtained.

Further, in order to obtain the fiber C, a conventionally known sea-island composite mouthpiece (number of islands per discharge hole: 15) is used, and the above-mentioned PET (polymer B of Example 1) is used as the island component and 5- as the sea component. A polyethylene terephthalate (copolymerized PET, melt viscosity 121 Pa · s) copolymerized with 8.0 mol% of sodium sulfoisophthalic acid and 10 wt% of polyethylene glycol having a molecular weight of 1000 is used as a volume ratio PET / copolymerized PET = 70/30, and the spinning temperature is 290. A sea-island type composite fiber was obtained by winding at ° C. and a spinning speed of 900 m / min and stretching 3.5 times between heating rollers set at 90 ° C. and 130 ° C.

The collected single yarn and Kaijima fiber were combined and supplied to a roller equipped with a winder to obtain a post-mixed fiber. After the mixed fiber yarn is processed into a woven or knitted fabric, the fiber C is dissolved and removed by 99% or more of the sea component with a 1 wt% sodium hydroxide aqueous solution (bath ratio 1/100) heated to 90 ° C. After the mixed fiber yarn was prepared, a cloth made of the mixed fiber yarn was collected according to the conditions of Example 1.

In the obtained mixed fiber, the presence index variation of the fiber A and the fiber B was 20% or more due to the post-mixed fiber, and it was confirmed that each fiber was non-uniformly present in the multifilament. That is, since the fibers C are partially densely present and cannot exert the effect peculiar to the ultrafine fibers, the fabric made of the mixed fiber yarn is bulkier (bulk altitude 1.4) as compared with the product of the present invention. ), The measurement of the water droplet disappearance time was large, and the water absorption diffusivity and water repellency were not exhibited (C, water droplet disappearance time 24 seconds). In addition, the result was that the texture was inferior due to the uneven distribution of the fibers (x), and shades (streaks) were observed in the color of the fabric, and the quality was also inferior. The results are shown in Table 1.

[Comparative Example 2]
The procedure was carried out according to Example 1 except that the arrangement of the base holes was changed so that 300 segments C were formed and the split type composite fibers having a total discharge amount of 33.6 g / min were collected.

The fabric made of the obtained mixed fiber yarn was inferior in bulkiness as compared with Example 1 due to the fact that the abundance ratio of the ultrafine fibers was too large. In addition, by expressing the characteristics derived from the ultrafine fibers more than necessary, the fabric becomes easy to settle and the slimy feeling is emphasized, and the texture evaluation as a textile is inferior. The results are shown in Table 1.

[Example 5]
The procedure was carried out according to Example 1 except that the arrangement of the base holes was changed so that 3 segments B and 16 segments C were formed, and split type composite fibers having a total discharge amount of 32.4 g / min were collected.
In Example 5, even when the abundance ratio of the fiber B is increased, it is confirmed that each fiber exists in a uniformly dispersed state, the characteristics of the fiber A and the fiber C are fully expressed, and a good texture is obtained. It was the fabric shown. The results are shown in Table 2.

[Comparative Example 3]
The procedure was carried out according to Example 1 except that the arrangement of the base holes was changed so that 10 segments B and 16 segments C were formed, and split type composite fibers having a total discharge amount of 64.8 g / min were collected.

In Comparative Example 3, due to the presence of the fiber B more than necessary, the mechanical properties of the fabric carried by the fiber A could not be sufficiently exhibited, and the swelling feeling and elasticity were improved as compared with the first embodiment. Was inferior. The results are shown in Table 2.

[Example 6]
It was carried out according to Example 1 except that the polymer B and the polymer C were changed to polypropylene terephthalate (PPT, melt viscosity 120 Pa · s) and the split type composite fiber was collected at a spinning temperature of 285 ° C.

In Example 6, combined with the rubber elasticity characteristics of PPT, the obtained fabric not only develops a more flexible texture, but also has a stretch function not found in Example 1. It was a characteristic fabric. Further, since PPT has a low refractive index as compared with PET, the obtained fabric is also excellent in color development. The results are shown in Table 2.

[Example 7]
It was carried out according to Example 1 except that the polymer A was changed to PET and the polymer B and the polymer C were changed to N6 to collect the split type composite fiber.

In Example 7, the fiber A has the rigidity of PET and the fiber C has the suppleness of N6, and the obtained fabric has a characteristic of exhibiting softness and moderate elasticity as compared with Example 1. It was a typical one. The results are shown in Table 2.

[Example 8]
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), spinning temperature 270 ° C., total discharge rate 27.2 g / min, After winding at a spinning speed of 1200 m / min, the drawing speed was set to 600 m / min between heating rollers set at 50 ° C. and 90 ° C., and 2.1 times stretching was carried out to carry out a split-type composite of 108 detx-72 filaments. It was carried out according to Example 1 except that the drawn yarn of the fiber was collected.

In Example 8, the obtained fabric feels lightweight due to the characteristics of PP, and exhibits water repellency due to the fine uneven structure of PP ultrafine fibers (B, water droplet disappearance time of 300 seconds or more). Met. The results are shown in Table 2.

In the fabric made of the mixed fiber yarn of the present invention, the fiber C, that is, the ultrafine fiber is in a homogeneously dispersed state also on the surface of the fabric and in the cross-sectional direction thereof, so that the characteristics derived from the ultrafine fiber are exhibited without impairing the bulkiness. be able to. Therefore, it produces a characteristic texture and an appropriate fluffy feeling, and can be expected as a natural cotton-like fabric with a unique tactile sensation that could not be achieved with conventional fabrics made of ultrafine fibers, and is generally used for jackets, skirts, pants, underwear, etc. A wide range of textile products such as clothing, sports clothing, clothing materials, carpets, sofas, curtains and other interior products, car seats and other vehicle interiors, cosmetics, cosmetic masks, wiping cloths, health products, and various filters. Can be suitably used for.

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 the multifilament
5: Fiber B in multifilament
6: Fiber C in multifilament
7: A perfect circle drawn so as to include 5 to 10 fibers A with the fiber A in the arbitrarily extracted multifilament as a center point 8: A circumscribed circle in the fiber A 9: Segment A
10: Segment B
11: Segment C

Claims (5)

In a multifilament in which three types of fibers having different fiber diameters are mixed, the fiber having the largest fiber diameter (fiber A), the fiber having an intermediate fiber diameter (fiber B), and the fiber having the smallest fiber diameter (fiber C) are evenly distributed. A mixed fiber yarn that is homogeneously present and has an abundance ratio R _AB of the fiber B to the fiber A of 1.0 to 3.0 and an abundance ratio R _AC of the fiber C to the fiber A of 3.0 to 100. .. The mixed fiber yarn according to claim 1, wherein the fiber diameter ratio of the fiber B to the fiber A is 0.60 or less, and the fiber diameter ratio of the fiber C to the fiber A is 0.25 or less. The mixed fiber yarn according to claim 1 or 2, wherein the degree of deformation of the fiber A is 1.2 or more. The mixed fiber yarn according to any one of claims 1 to 3, wherein the fiber A is a fiber made of polyamide, the fiber B and the fiber C are fibers made of polyester. A textile product containing at least the mixed yarn according to any one of claims 1 to 4.

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