JP6582518B2 - Tangled mixed crimped yarn and carpet - Google Patents

Description

  The present invention relates to a tangled mixed crimped yarn and a carpet. More specifically, the present invention relates to a entangled mixed fiber crimped yarn that is used, for example, for tufted carpets and that exhibits high glossiness and excellent volume feeling and texture, and a carpet using the entangled mixed fiber crimped yarn. .

  Conventionally, glossy yarns and various products made of such yarns are known. For example, carpets with glossy mixed yarn accents are widely used as tile carpets in places such as hotels and exhibition halls because they can produce gorgeousness. Such a carpet is required to have bulkiness (volume feeling and excellent texture) in addition to glossiness. So far, when obtaining a glossy carpet yarn using crimped yarn, in order to obtain a matte effect, a method of reducing the blending amount of titanium oxide added to the synthetic fiber to give a bright feeling, Methods have been examined such as reducing the crimp characteristics and increasing the linearity to increase the reflection of the yarn. However, according to these methods, there is a problem that the resulting carpet has an overall glare and an unpleasant gloss. Also known is a mixed yarn in which a glossy yarn (lamé yarn) using a film of polyester or the like on which an inorganic material such as silver is deposited as slit yarn and a crimped yarn is combined. However, lame yarns do not have crimp characteristics and are extremely vulnerable to wear. For this reason, the resulting carpet tends to lack volume.

  Therefore, for example, Patent Document 1 proposes a mixed yarn in which triangular or multileaf composite fiber yarns having latent crimping properties and multileaf section yarns having three or more convex portions are mixed by entanglement. Has been. Further, Patent Document 2 discloses a process in which a superfine fiber obtained by suede tone and a highly glossy trilobal cross-sectional fiber are mixed, and the surface of the ultrafine fiber is made by adjusting the boiling water shrinkage rate of the ultrafine fiber to be small. Yarns have been proposed. Further, Patent Document 3 proposes a processed yarn in which a single yarn having a cross-sectional shape with a degree of deformation of 1.6 to 2.5 is entangled with a single yarn having a cross-sectional shape having no recess. In addition, Patent Document 4 discloses an entangled mixed crimped yarn obtained by combining crimped yarns of different polymer types, and a difference in the latent crimp rate of each crimped yarn is suppressed to 10% or less. Shrinking has been proposed.

JP-A-8-134732 JP 2004-52142 A JP 2002-249937 A JP 2009-74212 A

  In the blended yarn described in Patent Document 1, the multi-leaf cross-sectional yarn constituting the blended yarn is a straight yarn and does not have latent crimpability. Further, in the processed yarn described in Patent Document 2, the trilobal cross-sectional yarn constituting the processed yarn is a crimped yarn and a straight yarn. None of these can provide a sufficient volume feeling when, for example, a tufted carpet is produced. In addition, the processed yarn described in Patent Document 3 using the crimped yarn and the crimped yarn described in Patent Document 4 are not sufficiently glossy.

  The present invention has been made in view of such conventional problems. For example, when used in tufted carpets, etc., the present invention has sufficient glossiness and excellent bulkiness (volume feeling, texture). And the like, and a carpet using the entangled mixed fiber crimped yarn.

  The present inventors can solve the above-mentioned problems by making each yarn constituting the mixed yarn a crimped yarn and specifying the cross-sectional shape and the crimp shrinkage rate of each crimped yarn. The headline and the present invention were completed.

  That is, the entangled mixed crimped yarn and carpet of the present invention that solve the above problems mainly include the following configurations.

  (1) A crimped yarn Y1 having a triangular cross section and a crimped yarn Y2 having a cross section other than a triangular cross section, and the crimped elongation rate R2 (%) of the crimped yarn Y2 after the boiling water treatment and the Y1 The difference (R2-R1) from the crimp elongation rate R1 (%) after boiling water treatment of 1 to 25 (%) is an entangled mixed crimped yarn.

  According to such a configuration, the entangled mixed crimped yarn includes the crimped yarn Y1 and the crimped yarn Y2 having different cross-sectional shapes. The entangled mixed crimped yarn includes a crimped yarn Y1 having a triangular cross section, and is excellent in gloss. Further, the entangled mixed crimped yarn includes a crimped yarn Y2 having a cross section other than a triangle, and is excellent in bulkiness (particularly volume feeling). Further, the crimp elongation rate R2 of the crimped yarn Y2 is 1 to 25 (%) greater than the crimp elongation rate R1 of the crimped yarn Y1. When such a tangled mixed crimped yarn is used for a carpet, for example, the crimped yarn Y1 is raised on the surface of the pile. As a result, glossiness can be emphasized.

  (2) The entangled mixed crimped yarn according to (1), wherein a ratio (d2 / d1) of a circumscribed circle diameter d2 to an inscribed circle diameter d1 of the triangular cross section is 1.3 to 2.0.

  According to such a configuration, the crimped yarn Y1 is likely to have a linear shape between the leaf portions in the triangular cross section. Therefore, the light is easily regularly reflected by the crimped yarn Y1, and glossiness is easily exhibited. Moreover, if the ratio (d2 / d1) is in the above range, the crimped yarn Y1 can easily maintain the rigidity of each leaf portion. Therefore, the entangled mixed crimped yarn can improve not only glossiness and bulkiness but also friction resistance and durability.

  (3) The difference (G1) between the glossiness G1 (%) of the tubular knitting produced using the crimped yarn Y1 and the glossiness G2 (%) of the tubular knitting produced using the crimped yarn Y2. -G2) is an entangled mixed crimped yarn according to (1) or (2), which is 2% or more.

  According to such a configuration, the entangled mixed crimped yarn has a large difference in glossiness between the crimped yarn Y1 and the crimped yarn Y2, so that the contrast is increased. As a result, glossiness is more easily emphasized.

  (4) In the chart of the glossiness G1 of the crimped yarn Y1, the reflectance curve has four reflectance peaks with respect to the baseline indicating the lowest reflectance, and the peak area of each reflectance peak. The entangled mixed crimped yarn according to (3), wherein the ratio is 20% or more of the total peak area defined by the base line and the reflectance curve.

  According to such a configuration, the resulting entangled mixed crimped yarn can be given further brilliant gloss.

  (5) The entangled mixed crimped yarn according to any one of (1) to (4), wherein the single fiber fineness of the crimped yarn Y1 is 2 to 35 dtex.

  According to such a configuration, the entangled mixed fiber crimped yarn can improve not only glossiness and bulkiness, but also wear resistance and durability that can withstand wear caused by walking and casters. Moreover, the entangled mixed crimped yarn has both moderate rigidity and soft feeling.

  (6) The entangled mixed crimps according to any one of (1) to (5), wherein the crimped yarn Y1 is a crimped yarn that has been crimped by a heated fluid jet textured process. yarn.

  According to such a configuration, the crimped yarn Y1 is easily subjected to sufficient crimping. As a result, the crimp elongation rate R1 is easily adjusted to be 1 to 25 (%) greater than the crimp elongation rate R2 of the crimped yarn Y2. Further, according to the heated fluid type textured processing, not only physical buckling (bending) of the yarn but also thermal fixation of the molecular structure can be performed as compared with other methods. As a result, it is easy to obtain a crimped yarn having high durability and suitable for carpet use, for example. Further, by using a fluid, a crimped yarn that is finer (smaller in size) than that in the case of mechanical crimping is obtained, and the design is excellent.

  (7) The crimped mixed yarn crimped yarn according to any one of (1) to (6), wherein the crimped yarn Y1 is made of a polyamide fiber.

  According to such a configuration, the entangled mixed crimped yarn obtained can be improved in wear resistance and durability.

  (8) The entangled mixed crimped yarn according to (7), wherein the polyamide fiber is polycaproamide.

  According to such a configuration, the entangled mixed crimped yarn obtained can be improved in wear resistance and durability. Further, the entangled mixed crimped yarn has excellent color developability at the time of dyeing and is relatively inexpensive.

  (9) A carpet using the entangled mixed crimped yarn according to any one of (1) to (8).

  According to such a configuration, the above-described entangled mixed crimped yarn is used for the carpet. Therefore, the carpet is excellent in glossiness and bulkiness (particularly volume feeling).

  ADVANTAGE OF THE INVENTION According to this invention, when used for a carpet etc., for example, the entangled mixed crimped yarn having sufficient glossiness and excellent bulkiness (volume feeling, texture, etc.) and the entangled mixed fiber A carpet using crimped yarn can be provided.

FIG. 1 is a chart showing the glossiness of a crimped yarn according to an embodiment of the present invention.

[Entangled mixed crimped yarn]
The entangled mixed crimped yarn (hereinafter also simply referred to as a mixed yarn) of one embodiment of the present invention is a mixture of a crimped yarn Y1 having a triangular cross section and a crimped yarn Y2 having a cross section other than a triangular cross section. Mixed yarn. In the blended yarn of this embodiment, the difference (R2−R1) between the crimp elongation rate R1 (%) of the crimped yarn Y1 and the crimp elongation rate R2 (%) of the crimped yarn Y2 is 1 to 25%. It is characterized by that. Therefore, first, an outline of the crimped yarn Y1 and the crimped yarn Y2 and their crimped elongation rates will be described, and other characteristics will be described later.

<Crimp yarn Y1>
The crimped yarn Y1 is a crimped yarn having a triangular cross section perpendicular to the length direction. In the present embodiment, the “triangular cross section” is a form of a trilobal cross section, and refers to a cross section having a deformation degree of 1.2 to 2.1. The “trilobal cross section” is a cross-sectional shape having three convex portions (leaf portions). The “deformation degree” is an index indicating the degree of unevenness of the cross section, and is the ratio (d2 / d1) of the diameter d2 of the circumscribed circle to the diameter d1 of the inscribed circle of the cross section. Since the degree of deformation of the crimped yarn Y1 is within the above range (that is, because it has a triangular cross section), the space between the leaves tends to be linear. In the mixed yarn in which the crimped yarn Y1 is mixed, the light regularly reflected by the crimped yarn Y1 is likely to gather on the light receiving side. As a result, the mixed fiber can exhibit excellent gloss.

  In addition, the shape of the leaf part in the triangular cross section may be pointed so as to have a vertex, or may be rounded. The shape of such a leaf portion can vary depending on the characteristics of the device and the manufacturing conditions when manufacturing the crimped yarn Y1, for example. For example, when the thermoplastic polymer that is the raw material of the crimped yarn Y1 is melt-extruded from the die, interfacial tension or the like may act on the end portion of the leaf portion. As a result, the end shape of the leaf portion of the crimped yarn Y1 is somewhat rounded.

<Crimp yarn Y2>
The crimped yarn Y2 is a crimped yarn whose cross-sectional shape perpendicular to the length direction is a shape other than a triangle. In the following description, among the crimped yarn Y2, the description common to the above-described crimped yarn Y1 (whether surface processing is performed, total fineness, single fiber fineness, raw material, manufacturing method, etc.) is appropriately omitted. The

  In the present embodiment, “cross-sections other than triangles” are all cross-sections showing the degree of deformation outside the range of the degree of deformation of the crimped yarn Y1 described above. For example, the cross section other than the triangle is a round cross section, or a deformed cross section such as a square, a Y shape, a multileaf, and a flat. Among these, when the cross section of the crimped yarn Y2 is a cross section, the crimped yarn Y2 can have not only bulkiness but also antifouling properties and wear resistance when processed into a carpet, for example. Note that the “rice-shaped cross section” refers to a shape similar in cross section to the Chinese character “rice”. That is, the rice field cross section is a cross-sectional shape composed of a substantially rectangular or circumferential frame (corresponding to the outer peripheral surface of the crimped yarn Y2) and orthogonal partition walls so as to divide the inside of the frame into four regions. is there. In addition, the crimped yarn Y2 has a higher crimp rate when a Y-shaped cross section or the like is employed than when a round cross section is employed. Therefore, by using the crimped yarn Y2 having a Y-shaped cross section or the like, for example, the obtained carpet can improve the volume feeling.

<Difference in crimp elongation>
(Crimp elongation rate R1 of crimped yarn Y1)
The crimped yarn Y1 preferably has a crimp elongation rate R1 after boiling water treatment (hereinafter also simply referred to as crimp elongation rate R1) of 5% or more, and more preferably 10% or more. Further, the crimp elongation R1 is preferably 35% or less, and more preferably 30% or less. When the crimp elongation ratio R1 is 5 to 35%, the expression of crimp is sufficient, the volume feeling of the resulting carpet is excellent, and the texture can be further improved. Moreover, the resulting carpet has excellent wear resistance. The crimp elongation R1 can be adjusted, for example, by performing heat treatment in crimping. The heat treatment necessary for adjusting the crimp elongation ratio R1 to 5 to 35% can be generally performed even under severe conditions. Therefore, the crimp expansion rate R1 can be easily controlled within a desired range. In the present embodiment, the crimp elongation rate R1 is an index of crimp characteristics that are manifested, for example, during carpet dyeing or heat treatment during backing, and can be calculated based on the following conditions.

<Example of measuring method of crimp elongation>
First, the crimped yarn Y1 is left in a room at room temperature of 20 ° C. and a humidity of 65% for 20 hours or more, and then a crimped yarn is prepared using a measuring instrument. The obtained crimped yarn Y1 (yarn) in a skein state is left for 3 hours in a room with a room temperature of 20 ° C. and a humidity of 65%. The yarn is then immersed in boiling water for 20 minutes (boiling water treatment). The skeined yarn treated with boiling water is left to dry in a room at a room temperature of 20 ° C. and a humidity of 65% for 12 hours to obtain a sample yarn. An initial load of 0.0176 mN / dtex is applied to the sample yarn, and a sample length of 50 cm (L1) is marked after 30 seconds. Next, a constant load of 0.882 mN / dtex is applied to the same sample yarn, and the extended sample length (L2) is measured after 30 seconds. Based on the following formula, the crimp elongation ratio R1 (%) after the boiling water treatment is calculated.
R1 = {(L2-L1) / L1} × 100

(Crimp elongation rate R2 of crimped yarn Y2)
As with the crimped yarn Y1, the crimped yarn Y2 preferably has a crimped elongation rate R2 after boiling water treatment (hereinafter also simply referred to as crimped elongation rate R2) of 10% or more, and 15% or more. More preferably. Further, the crimp elongation R2 is preferably 40% or less, and more preferably 35% or less. However, as described in detail below, the mixed yarn of this embodiment has a difference (R2−R1) between the crimp elongation rate R2 of the crimped yarn Y2 and the crimp elongation rate R1 of the crimped yarn Y1 is 1. -25 (%). Therefore, the crimp elongation rate R2 may be adjusted to a suitable range as long as the difference (R2-R1) is included in the above range. In the present embodiment, the crimp elongation rate R2 can be measured according to the measurement method described above in relation to the crimped yarn Y1.

(Difference in crimp elongation (R2-R1))
In the blended yarn of this embodiment, the difference (R2-R1) between the crimp elongation rate R1 (%) of the crimped yarn Y1 and the crimp elongation rate R2 (%) of the crimped yarn Y2 is 1 to 25%. is there. That is, the difference (R2-R1) may be 1% or more, and is preferably 3% or more. Moreover, a difference (R2-R1) should just be 25% or less, and it is preferable that it is 15% or less. When the difference (R2−R1) is within the above range, when the obtained mixed yarn is used for, for example, a carpet, the crimped yarn Y1 having excellent gloss tends to be lifted on the surface of the pile. Therefore, the glossiness of the carpet is easily emphasized, and a gorgeous impression is easily obtained. When the difference (R2−R1) is less than 1%, the blended yarn is less likely to be exposed on the surface of the pile when the carpet is used for carpet, and is easily hidden inside the pile. For this reason, the gloss tends to be reduced. On the other hand, when the difference (R2−R1) exceeds 25%, when the mixed yarn is used for a carpet, the crimped yarn Y1 tends to be excessively exposed on the surface of the pile. Therefore, the filaments constituting the crimped yarn Y1 are likely to be lost due to wear, the carpet contrast is increased, and the pattern is likely to be monotonous.

<Other suitable characteristics>
Next, of the properties of the crimped yarn Y1 and the crimped yarn Y2, the properties that the mixed yarn of the present embodiment is preferably satisfied will be described.

(Degree of deformation of crimped yarn Y1)
The degree of deformation of the crimped yarn Y1 is preferably 1.3 or more, and more preferably 1.5 or more. Further, the degree of deformation of the crimped yarn Y1 is preferably 2.0 or less, and more preferably 1.7 or less. When the degree of deformation is 1.3 or more, the crimped yarn Y1 tends to be more appropriately linear between the leaf portions. For this reason, the crimped yarn Y1 is easy to regularly reflect light, and glossiness is more easily exhibited. Further, when the degree of deformation is 2.0 or less, the crimped yarn Y1 can easily maintain the rigidity of each leaf portion. Therefore, the obtained mixed yarn can improve not only glossiness and bulkiness but also friction resistance and durability. In addition, the calculation method of a deformation degree is later mentioned in an Example.

(Single fiber fineness of crimped yarn Y1)
The single fiber fineness of the crimped yarn Y1 is preferably 2 dtex or more, more preferably 10 dtex or more, and further preferably 15 dtex or more. The single fiber fineness of the crimped yarn Y1 is preferably 35 dtex or less, more preferably 30 dtex or less, and further preferably 25 dtex or less. When the single fiber fineness is within the above range, the crimped yarn Y1 not only has sufficient glossiness and bulkiness, but also can improve wear resistance and durability that can withstand wear caused by walking and casters. Moreover, the obtained mixed yarn has both moderate rigidity and soft feeling. The single fiber fineness can be calculated by dividing the total fineness by the number of filaments. A method for calculating the total fineness will be described later. The number of filaments can be calculated based on the method of JIS L1013 (1999) 8.4.

(Raw material of crimped yarn Y1)
The raw material of the crimped yarn Y1 is not particularly limited as long as the cross-sectional shape and the crimp elongation rate R1 (%) can be satisfied. As an example, the raw material of the crimped yarn Y1 is a thermoplastic polymer. Examples of the thermoplastic polymer include polyamide fiber, polyolefin fiber, and polyester fiber. The raw material of the crimped yarn Y1 is preferably a polyamide fiber from the viewpoint that the obtained crimped yarn Y1 has good durability, wear resistance, and coloring property at the time of dyeing, and is inexpensive. More specifically, examples of the raw material of the crimped yarn Y1 include polycaproamide (nylon 6) and polyhexamethylene adipamide. Among these, the raw material of the crimped yarn Y1 is more preferably polycaproamide. The crimped yarn Y1 may be a copolymer containing a copolymerization component in order to improve the spinning property and the quality of the final product. The crimped yarn Y1 may be used in combination with other polymer having an amide bond or a copolymer thereof. Thermoplastic polymers include matting agents such as titanium oxide, pigments, weathering agents, antioxidants, antibacterial agents, bactericides, hygroscopic agents, deodorants, deodorants, fragrances, gloss-introducing agents, and phosphorescent substances. In addition, a fluorescent substance or the like may be appropriately blended.

(Method for producing crimped yarn Y1)
The manufacturing method of the crimped yarn Y1 is not particularly limited. As an example, the crimped yarn Y1 can be manufactured by a process consisting of melt spinning, cooling, oiling, drawing and crimping. At this time, the crimping process is preferably performed by a textured process using a heated fluid system. According to the textured processing of the heated fluid system, not only the physical buckling (bending) of the yarn but also the thermal fixation of the molecular structure can be performed as compared with other methods. As a result, it is easy to obtain a crimped yarn having high durability and suitable for carpet use, for example. Further, by using a fluid, a crimped yarn that is finer (smaller in size) than that in the case of mechanical crimping is obtained, and the design is excellent. Examples of the crimping apparatus that can be used include a jet nozzle system, a jet stuffer system, and a gear system type. Among these, it is preferable that the crimping apparatus is an apparatus that employs a jet nozzle method or a jet stuffer method because high crimps can be easily imparted. The temperature of the heated fluid applied to the yarn (that is, the crimping temperature) is preferably 190 ° C. or higher, and more preferably 210 ° C. or higher. Moreover, it is preferable that the temperature of a heating fluid is 250 degrees C or less, and it is more preferable that it is 240 degrees C or less. When the temperature of the heating fluid is 190 ° C. or higher, the heat treatment becomes sufficient and sufficient crimping can be imparted. In addition, when the temperature of the heating fluid is 250 ° C. or less, the polymer is hardly fused or deteriorated by heat treatment, and the obtained crimped yarn has various physical properties (tensile strength, elongation, crimp elongation) and wear resistance. Excellent in properties. In the crimping process, in addition to the above processing temperature, the flow rate of the heating fluid, the speed, the processing residence time, and the like may be appropriately changed. Thereby, the crimpability of the crimped yarn obtained can be adjusted arbitrarily.

(Glossiness G1 (%) of crimped yarn Y1)
The glossiness G1 of the crimped yarn Y1 is not particularly limited as long as the intended designability can be expressed. The glossiness G1 is appropriately adjusted so that the crimped yarn Y1 has appropriate glossiness and aesthetics. Further, the glossiness G1 can be calculated as the glossiness of the tubular knitting produced using the crimped yarn Y1. In the present embodiment, the tubular knitting can be produced based on the following conditions. In the present embodiment, the glossiness G1 is the maximum value of the reflectance peak obtained by the following method.

-Example of production conditions of cylinder knitting Using a cylinder knitting machine (model number: TN-21) of Koike Machine Industry Co., Ltd., from a crimped yarn Y1, a cylinder knitted fabric (course: 14 pieces / 2.54 cm, wale: 11) Book / 2.54 cm). The take-up tension to the tube knitting machine is 20 g.

-An example of the glossiness calculation method Using a three-dimensional variable angle photometer GP-200 of Murakami Color Research Laboratory Co., Ltd., measurement is performed under reflection conditions. At that time, the sample surface angle with respect to the light source and the angle of the light receiver with respect to the sample are set to 60 °, the sensitivity is set to 995, the light source voltage (high volt) is set to 740V, the sample is rotated 360 °, and the reflectance chart is obtained. To do. In addition, the sample uses the thing which stuck the pipe knitting so that it may become a sheet | seat shape by opening a cylinder, and 40 mm square board | substrate may not be slack.

  FIG. 1 is a chart showing the glossiness G1 of the crimped yarn Y1 (in FIG. 1, the sample A-1 adjusted in an example described later is illustrated). The characteristics of the glossiness G1 and reflectance curve of the crimped yarn Y1 will be described with reference to FIG. The glossiness G1 of the crimped yarn Y1 is indicated by the change in reflectance (reflectance curve C1) in FIG. As shown in FIG. 1, the reflectance curve C1 of the crimped yarn Y1 shows four reflectance peaks P1 to P4 within a measurement range of 360 °. The glossiness G1 is a reflectance peak (reflectance peak P1) showing the maximum reflectance among the reflectance peaks P1 to P4. In the present embodiment, the reflectance peak is an upwardly convex peak and appears approximately every 90 ° within a 360 ° measurement range. FIG. 1 exemplifies a case where reflectance peaks P1 to P4 appear when the sample rotation angle is about 45 °, 135 °, 225 °, and 315 °, respectively. For this reason, fine peaks other than these (for example, a slight peak appearing at the shoulder portion of the reflectance peak P2) are not counted as reflection peaks in the present embodiment.

  The reason why the reflectance curve C1 of the crimped yarn Y1 shows four reflectance peaks P1 to P4 is as follows. First, in general, a woven fabric is arranged so that warps and wefts have a substantially uniform depth (thickness) in the depth direction. Therefore, in such a woven fabric, when the sample is rotated, a reflectance peak appears every about 90 °. The reflectance peak is approximately the same or slightly lower when measuring a yarn that has sunk in the depth direction in the fabric. On the other hand, the knitted fabric has no warp or weft. Therefore, since the knitted fabric has a large change in the depth direction, when the glossiness is measured on the knitted fabric, only a large peak appears every sample rotation of about 180 ° (the crimped yarn Y2 described later). Reflectance curve C2 (see FIG. 1)). On the other hand, the crimped yarn Y1 of the present embodiment has a triangular cross section. Therefore, unlike a general knitted fabric, a knitted fabric (cylinder knitted sample) using such crimped yarn Y1 has a strong gloss caused by the filaments. As a result, both the straight line portion when viewed as a weft and the loop portion when treated as a warp with respect to the weft appear as a large reflectance peak. In FIG. 1, the peak P2 and the peak P4 are expressed as reflectance peaks that exhibit the same large reflectance as the peak P1 and the peak P3. Therefore, the mixed yarn using the crimped yarn Y1 exhibits excellent gloss.

  Further, in the reflectance curve C1 of the crimped yarn Y1, it is preferable that the area of each of the reflectance peaks P1 to P4 is 20% or more of the total peak area. In addition, the area of each of the reflectance peaks P1 to P4 is preferably 35% or less of the total peak area. If the reflectance peaks P1 to P4 are within the above range, the resulting blended yarn can be imparted with ornate glossiness. In the present embodiment, the total peak area refers to an area S1 of a region defined by the base line L1 and the reflectance curve C1 in the chart. The base line L1 is a line segment that is parallel to the horizontal axis of the chart and passes through a point indicating the lowest reflectance in the reflectance curve C1.

(Glossiness difference (G1-G2))
In the mixed yarn of this embodiment, the difference (G1−G2) between the glossiness G1 (%) of the crimped yarn Y1 and the glossiness G2 (%) of the crimped yarn Y2 is preferably 2% or more, More preferably, it is 5% or more. When the difference (G1-G2) is 2% or more, the gloss and aesthetics of the carpet using the obtained mixed yarn are more excellent. The upper limit of the difference (G1-G2) is not particularly limited. The larger the difference (G1-G2) is, the better the glossiness is. However, the difference (G1-G2) may be 50% or less from the viewpoint of reducing the remarkable difference in hue between the crimped yarn that floats on the surface of the carpet and the crimped yarn viewed from the inside. .

  The glossiness G2 of the crimped yarn Y2 can be calculated by the same method as the glossiness G1 of the crimped yarn Y1. By the way, when calculating the difference in glossiness (G1-G2), it is preferable that the total fineness of the crimped yarn Y1 and the crimped yarn Y2 that form the tubular knitting is approximately the same. This is because when the total fineness of the crimped yarn Y1 and the crimped yarn Y2 is approximately the same, it is easy to clarify the difference in glossiness between the crimped yarns. From this viewpoint, in the present embodiment, the total fineness of the crimped yarn Y1 is preferably within ± 30% of the total fineness of the crimped yarn Y2. If the total fineness of the crimped yarn Y1 exceeds ± 30% of the total fineness of the crimped yarn Y2, one of the crimped yarns may be appropriately combined to adjust the total fineness.

  Referring again to FIG. 1, the reflectance curve of the crimped yarn Y <b> 2 (in FIG. 1 exemplifies the sample B-1 adjusted in the example described later) shows two reflectance peaks P <b> 5 within a measurement range of 360 ° -P6 is shown. The area of each of the reflectance peaks P5 to P6 is 20% or more of the total peak area. The total peak area refers to an area S2 of a region defined by the base line L2 and the reflectance curve C2. The reflectance peaks P5 to P6 all have a reflectance of 20% or more. The glossiness G2 is a reflectance peak (reflectance peak P5) showing the maximum reflectance among the reflectance peaks P5 to P6. Thus, since the crimped yarn Y2 does not have a triangular cross section, a total of two peaks appear every sample rotation of about 180 ° as in a general knitted fabric. As described above, when the number of peaks occupying an area of 20% or more is less than 4, the obtained crimped yarn Y2 has a glossy feeling, but a gorgeous impression is reduced.

<Other characteristics of crimped yarn Y1 and crimped yarn Y2>
Next, other characteristics of the crimped yarn Y1 and the crimped yarn Y2 will be described.

(Cross sectional shape of crimped yarn Y1)
In order to add various functionalities, the crimped yarn Y1 may have a cavity along the length direction formed therein. The crimped yarn Y1 may have a hole in the center of the cross section, for example, for weight reduction. The shape and size of the holes are appropriately adjusted according to the desired glossiness, strength, and the like. As an example, the crimped yarn Y1 may be formed with a round hole having an opening diameter of about 1 to 10% of the cross-sectional area of the triangular cross section. Similarly, the crimped yarn Y2 may be formed with a cavity in order to add various functionalities.

(Surface processing of crimped yarn Y1 and crimped yarn Y2)
The crimped yarn Y1 and the crimped yarn Y2 (hereinafter also simply referred to as both crimped yarns) may be subjected to various processing on each or any surface in order to add various functionalities. As an example, both crimped yarns may be provided with irregularities in order to increase the surface area and improve water absorption. The method for forming the unevenness is not particularly limited. The unevenness may be formed by adjusting the shape of the die used when the thermoplastic polymer is melt extruded, and is formed by subjecting the filament obtained by melt extrusion to a post-treatment (for example, alkali weight loss treatment). May be. In addition, both crimped yarns may be coated with other polymers or oils in order to reduce friction characteristics. The method of coating is not particularly limited. The coating may adjust the shape of the die used when melt-extruding the thermoplastic polymer, and may be a composite spinning of the thermoplastic polymer and the coating polymer, and the filaments obtained by melt-extrusion may be post-treated (for example, It may be formed by applying a polymer coating treatment). The number and height of the irregularities, the type of coating (polymer type) and the degree may be adjusted as appropriate as long as the glossiness of the resulting blended yarn is not significantly impaired.

(Total fineness)
The total fineness of the crimped yarn Y1 is preferably 500 dtex or more, and more preferably 700 dtex or more. Further, the total fineness of the crimped yarn Y1 is preferably 3000 dtex or less, and more preferably 2500 dtex or less. When the total fineness is 500 dtex or more, the crimped yarn Y1 can obtain a sufficient volume feeling and excellent texture when a tile carpet is produced using the obtained mixed yarn. Moreover, when the total fineness is 3000 dtex or less, the production cost of the crimped yarn Y1 can be suppressed. Furthermore, the crimped yarn Y1 can maintain good air permeability in the tufting process when a carpet is produced using the obtained mixed yarn. The total fineness can be calculated based on the JIS L1013 (1999) 8.3.1 B method.

  On the other hand, the total fineness of the crimped yarn Y2 is such that when it is used as a blended yarn with the crimped yarn Y1, it is difficult for tarmi to occur, and in order to suppress the stop of the device due to catching when the blended yarn passes, The fineness is preferably the same as that of the crimped yarn Y1. At this time, the total fineness of the crimped yarn Y2 is not necessarily the same as the total fineness of the crimped yarn Y1. Specifically, the total fineness of the crimped yarn Y2 is preferably within ± 30% of the total fineness of the crimped yarn Y1, and more preferably within ± 10%.

(Manufacturing method of both crimped yarns)
Both crimped yarns are preferably subjected to the above-described crimping treatment, and other steps are not particularly limited. As an example, both crimped yarns can be produced by a process consisting of melt spinning, cooling, oiling, drawing and crimping.

-Melt spinning Examples of the melt spinning apparatus used in melt spinning include an extruder-type spinning machine and a pressure melter-type spinning machine. Among these, an extruder type spinning machine is preferably used from the viewpoint of excellent uniformity of a product to be obtained, yarn production yield, and the like. In addition, when adding matting agents, pigments, and other functional agents in the melting stage, prepare a master chip with a high concentration of functional material, blend the master chip and base chip, and then spin It may be put into a machine, or each chip may be put in while being weighed immediately above the spinning machine. The functional agent may be charged directly into the spinning machine in a powder or liquid state. In melt spinning, the raw material (for example, thermoplastic polymer) viscosity, spinning temperature, die hole shape, discharge rate, cooling, etc. so that the yarn obtained satisfies the desired total fineness, single fiber fineness, cross-sectional shape, etc. The spinning conditions are set appropriately.

-Cooling and oil supply The melt-spun yarn (yarn) is appropriately cooled and solidified by cold air, and after an oil agent is applied, it is wound around a take-up roller and taken up. The take-up speed may be, for example, 300 to 1500 m / min.

-Stretching The obtained yarn (fiber) may be appropriately stretched and heat-set. The stretching method is not particularly limited. As an example, a one-stage or two-stage multi-stage heat stretching method may be employed during stretching. Moreover, a steam processing apparatus etc. may be used together for the purpose of fixing the stretching point. The draw ratio is not particularly limited. The draw ratio is preferably 2 to 4 times from the viewpoint that a certain degree of orientation and crystallization can be performed. The stretching temperature may be, for example, 160 to 200 ° C.

-Crimping process The crimping process is as described above. The crimping process is appropriately adjusted so that the difference (R2−R1) in the crimp elongation rate is 1 to 25 (%). The crimped yarn Y1 is preferably crimped by a heated fluid jet textured process.

  In the crimping process, in order to fix the crimp, a method of cooling with a cooling medium at the time of crimping stuffing or a method of combining a rotary filter may be employed. In the crimping process, the stretched yarn may be continuously crimped without being wound, and once wound at the stage of unstretched yarn or stretched yarn, the winding is released, and the A shrinking step may be performed.

  In the crimping process, the speed of the yarn introduced into the crimping nozzle of the crimping apparatus is usually about 500 to 3500 m / min. When the speed of the yarn is within this range, the crimped yarn is efficiently produced, the crimp is easily fixed after passing through the nozzle, and can run stably. After the crimped yarn has been partially stretched by being stretched moderately, the crimped yarn is wound around cheese, bobbins, cones, or the like using a winder or the like. The crimped yarn may be entangled before winding so that the subsequent steps can be performed smoothly. By the entanglement process, the crimped yarn can be given a convergence. The number of entanglements when the entanglement process is performed is not particularly limited. As an example, the number of entanglements exceeds 0 / m, preferably 5 / m or more. The number of entanglements is 15 pieces / m or less, preferably 12 pieces / m or less. When the number of entanglement is greater than 0 / m and not greater than 15 / m, the crimped yarn can be smoothly performed in subsequent steps without impairing various properties. When the crimped yarn is supplied to the entanglement nozzle, it is preferable that the running tension is usually 0.2 g / dtex or less, particularly 0.1 g / dtex or less. The air pressure at the time of performing the entanglement process may be appropriately set so as to have a predetermined number of entanglements in consideration of the fineness and tension of the yarn. As an example, the air pressure is preferably adjusted in the range of 0.2 to 0.9 MPa so that the entanglement node is not too hard.

  Returning to the description of the entire blended yarn, the blended yarn of the present embodiment is a blended yarn in which the crimped yarn Y1 and the crimped yarn Y2 are entangled and mixed. The method for interlacing the crimped yarn Y1 and the crimped yarn Y2 is not particularly limited. For example, the entangled fiber mixture may be performed by fluid processing using an entangled nozzle or the like. At that time, the crimped yarn supplied to the entanglement nozzle is not particularly limited as long as two or more kinds of crimped yarns are aligned at the time of supply to the entanglement nozzle. Two or more kinds of crimped yarns may be, for example, wound once after being subjected to spinning, drawing, and crimping, and then fed to the entanglement nozzle after being unwound and aligned. They may be respectively wound and stretched, wound once, then unwound and subjected to crimping treatment, and then fed to the entanglement nozzle after being aligned. Further, the crimped yarns may be simultaneously spun, drawn, and crimped in parallel, and may be supplied to the entanglement nozzles without being wound once. The crimped yarn effectively suppresses the occurrence of yarn loosening and yarn breakage in the entangled nozzle fluid treatment area, and stably performs the entanglement process. In addition, stretching is preferable, and it is more preferable to stretch by applying a stress of 1.6 nM / dtex or more. The crimped yarn is preferably stretched by applying a stress of 2.5 mN / dtex or less, and more preferably stretched by applying a stress of 2.0 mN / dtex or less. When the stress is within the above range, the crimped yarn does not have a reduced crimp characteristic, and a crimped yarn having a low crimp elongation rate hardly forms a loop. For this reason, the crimped yarn obtained is less likely to stop the apparatus due to crimped yarn tarmi (loop) during tufting. In addition, the obtained crimped yarn can easily prevent entanglement from being lost, and can produce a carpet in which the tuft pattern is adjusted more finely and stably.

  In the entangled mixed fibers, the ratio of the mixed fibers of both crimped yarns is not particularly limited. The ratio can be appropriately selected depending on the desired characteristics. As an example, the ratio of the crimped yarn Y1 is preferably 5% or more, more preferably 25% or more with respect to the total of the mixed fiber crimped yarn. Further, the ratio of the crimped yarn Y1 is preferably 95% or less, and more preferably 75% or less with respect to the total of both crimped yarns. The ratio of the crimped yarn Y2 is preferably 5% or more, and more preferably 25% or more with respect to the total of the mixed crimped yarns. Further, the ratio of the crimped yarn Y2 is preferably 95% or less, and more preferably 75% or less with respect to the total of both crimped yarns. Especially, it is preferable that the crimped yarn Y2 is mixed with the crimped yarn Y1 so as to be ± 30%. In addition, fibers other than the crimped yarn Y1 and the crimped yarn Y2 may be mixed. In this case, the total of the crimped yarn Y1 and the crimped yarn Y2 is less than 100%. The total of the crimped yarn Y1 and the crimped yarn Y2 is preferably 50% or more, and more preferably 60% or more in the mixed fiber crimped yarn. The total of the crimped yarn Y1 and the crimped yarn Y2 is preferably 100% or less in the mixed crimped yarn. If the ratio of the crimped yarn Y1 and the crimped yarn Y2 is within the above range, for example, a carpet is produced using the obtained mixed yarn, so that the balance between glossiness and bulkiness (volume feeling, texture, etc.) is achieved. A picked carpet can be obtained. When the ratio of the crimped yarn Y1 is 5% or more with respect to the total of the both crimped yarns, for example, when a carpet is produced using the obtained mixed yarn, the carpet is likely to obtain sufficient gloss. On the other hand, when the ratio of the crimped yarn Y1 is 95% or less with respect to the total of the both crimped yarns, the resulting carpet is likely to have sufficient bulkiness.

  As described above, the mixed yarn of this embodiment includes the crimped yarn Y1 and the crimped yarn Y2. The crimped yarn Y1 has a triangular cross section, and can impart excellent gloss to the resulting blended yarn. In addition, the crimped yarn Y2 has a cross section other than a triangular shape, and can impart excellent bulkiness to the resulting blended yarn. Further, the crimp elongation rate R2 of the crimped yarn Y2 is 1 to 25 (%) greater than the crimp elongation rate R1 of the crimped yarn Y1. When such a mixed yarn is used for a carpet, for example, the crimped yarn Y1 is raised on the pile surface. As a result, glossiness can be emphasized.

  Moreover, the mixed yarn of this embodiment can be used for various products that require glossiness and bulkiness. Examples of such products include various carpets, interior products, and fashion products.

[carpet]
The carpet of one embodiment of the present invention is a carpet using the above-mentioned mixed yarn. The manufacturing method of a carpet is not specifically limited. The carpet can be manufactured, for example, by using the above-described mixed yarn as a face yarn and using a conventionally known tufting machine.

The conditions for producing the carpet are not particularly limited. As an example, the carpet may have a basis weight of 700 to 1500 g / m ² and a pile height of 3.0 to 8.0 mm. In this case, tufting is easy, and the resulting carpet is excellent in bulkiness (volume feeling and texture). The carpet can be dyed by immersing it in a solution in which the dye is dissolved in the state of crimped yarn before processing or in the state of being processed into a carpet. In addition, the carpet may be mixed with conductive fibers in order to suppress static electricity, and an antifouling agent may be applied to increase the antifouling property.

  The kind of carpet obtained is not particularly limited. Examples of the carpet include a roll-type carpet, a tile carpet, an automobile line mat and an optional mat, a household rug, and an entrance mat. Moreover, the form of a pile is not specifically limited. The form of the pile may be either a loop pile or a cut pile. The carpet may be not only a tufted carpet but also a woven fabric, a knitted fabric, an embroidered rug, or the like.

  As mentioned above, the above-mentioned mixed yarn is used for the carpet of this embodiment. Therefore, the carpet is excellent in glossiness and bulkiness (volume feeling, texture).

  Hereinafter, the present invention will be described more specifically with reference to examples. The present invention is not limited to these examples. In the following examples, each characteristic value was calculated by the following method.

<Calculation method of characteristic value>
(Sulfuric acid relative viscosity (ηr))
The relative viscosity of sulfuric acid was calculated from the following equation by using a polymer chip as a sample, dissolving 0.25 g of the sample in 25 ml of 98% sulfuric acid, measuring at 25 ° C. using an Ostwald viscometer.
ηr = flowing seconds of sample solution / flowing seconds of sulfuric acid only (amino end group amount)
The amount of amino end groups was determined by accurately weighing 0.2 g of a sample using a polymer chip as a sample and dissolving in 25 cc of a phenol / ethanol mixed solution (83.5: 16.5, volume ratio), and then using a 0.02N hydrochloric acid aqueous solution. And calculated by titration.
(Total fineness)
The total fineness is measured according to JIS L1013 (1999) 8.3.1 Positive Fineness b) Mass of the sample sampled by applying an initial load of 0.882 mN / dtex according to the B method, A value obtained by multiplying the official moisture content defined in JIS L 0105 3.1 was used (4.5% for polyamide, and 0% for polypropylene, respectively).
(Single fiber fineness)
The single fiber fineness was calculated by dividing the total fineness by the number of filaments.
(Number of filaments)
The number of filaments was calculated based on the method of JIS L1013 (1999) 8.4.
(Deformation degree)
The degree of deformation was measured by preparing a sample by the following method. First, the ends of the crimped yarn wrapped with rayon staples are passed through a hole (hole diameter: 1.0 mm) in a stainless steel preparation with a thickness of 0.5 mm, and cut in parallel along both sides of the preparation with a safety razor. This was used as a sample for cross-sectional observation. This sample was observed 500 times using a digital microscope “VHX-500” manufactured by Keyence Corporation, and the ratio (d2 / d1) of the diameter d2 of the circumscribed circle to the diameter d1 of the inscribed circle of the single yarn cross section Calculated. Observation was performed for 10 samples, and the ratios obtained were averaged to determine the degree of deformation. Further, based on the observation result of the cross section and the degree of deformation, the cross sectional shape was determined according to the following criteria.
Judgment criteria Triangular cross section: The cross-sectional shape was a trilobal cross section, and the degree of deformation was 1.2 to 2.1.
Y-shaped cross section: Degree of deformation exceeded 2.1.
Round cross section: Deformation degree was less than 1.2.
(Crimp elongation)
First, each crimped yarn was allowed to stand in a room with a room temperature of 20 ° C. and a humidity of 65% for 20 hours or more, and then a crimped yarn was prepared using a measuring instrument. The obtained crimped yarn (yarn) in a skein state was allowed to stand for 3 hours in a room with a room temperature of 20 ° C. and a humidity of 65%. The yarn was then immersed in boiling water for 20 minutes (boiling water treatment). The skeined yarn treated with boiling water was left to dry in a room at a room temperature of 20 ° C. and a humidity of 65% for 12 hours to obtain a sample yarn. An initial load of 0.0176 mN / dtex was applied to the sample yarn, and marking was performed on a sample length of 50 cm (L1) after 30 seconds had elapsed. Next, a constant load of 0.882 mN / dtex was applied to the same sample yarn, and the sample length (L2) was measured after 30 seconds. Based on the following formula, the crimp elongation (%) after the boiling water treatment was calculated.
Crimp elongation rate = {(L2-L1) / L1} × 100
(Glossiness)
-Production of tubular knitting Using a tubular knitting machine (model number: TN-21) of Koike Machine Industry Co., Ltd., from each crimped yarn, a tubular knitted fabric (course: 14 pieces / 2.54 cm, wale: 11 pieces / 2.54 cm) was produced. The take-up tension to the tube knitting machine was 20 g.
-Calculation method of glossiness Measurement was performed under reflection conditions using a three-dimensional goniophotometer GP-200 from Murakami Color Research Laboratory. At that time, the sample surface angle with respect to the light source and the angle of the light receiver with respect to the sample are set to 60 °, the sensitivity is set to 995, the light source voltage (high volt) is set to 740V, the sample is rotated 360 °, and the reflectance chart is obtained. did. In addition, the sample used the thing which stuck the pipe knitting so that it might not be loosened by opening a tubular knitting into one sheet shape. With reference to the obtained chart, the value of the reflectance peak and the number of reflectance peaks indicating a peak area of 20% or more of the total peak area were determined. Among the obtained reflectance peak values, the largest value was defined as the glossiness.

<Manufacture of crimped yarn>
(Crimp yarn A-1)
Nylon 6 chips (sulfuric acid relative viscosity: 2.80) having a melting point of 225 ° C. and an amino end group amount of 5.4 × 10 ⁻⁵ mol / g were melted with an extruder-type spinning machine, spinning temperature was 270 ° C., and triangular cross section Spinning was performed using a spinneret. The spun yarn is cooled and solidified by a uniflow-type chimney, and after being applied with an oil agent by an oil supply roll, it is stretched, and once wound, it is 230 ° C. and 0.9 MPa with a Taslan type jet stuffer crimp nozzle. Crimping was imparted by superheated steam. Thereafter, the mixture was cooled and fixed with a rotary filter, and entangled with a entanglement nozzle, and a crimped yarn A-1 (an example of a crimped yarn Y1) having a total fineness of 1000 dtex and 68 filaments was obtained. The cross-sectional shape of the obtained crimped yarn was triangular. In addition, the cross-sectional shape (that is, the degree of deformation) was adjusted by appropriately selecting the shape of the die and adjusting the relative viscosity of sulfuric acid of the nylon 6 chip charged into the extruder. The relative viscosity of sulfuric acid was adjusted by adjusting the liquid phase polymerization time or the solid phase polymerization time. The crimp elongation rate was adjusted by adjusting the heating temperature at the crimp nozzle. Table 1 shows the characteristics of the obtained crimped yarn A-1.

(Crimp yarn A-2, A-5 to A-8)
Adjust the sulfuric acid relative viscosity as necessary, change the shape of the nozzle discharge hole to one that gives the desired cross-sectional shape, adjust the cross-sectional shape and degree of deformation, and if necessary, adjust the heating temperature of the crimp nozzle The crimped yarns A-2, A-5 to A-8, B-1 to B-3, by the same method as the crimped yarn A-1, except that the crimp elongation rate was appropriately adjusted by adjusting C-1 was produced. Table 1 shows the characteristics of the obtained crimped yarns A-2, A-5 to A-8, B-1 to B-3, and C-1. The crimped yarns B-1 and C-1 are examples of “crimped yarn Y2 having a cross section other than a triangle”, and the other are examples of crimped yarn Y1.

(Crimp yarns A-3 to A-4)
A method similar to the crimped yarn A-1, except that the number of filaments is changed by using a base having a different number of holes and the crimping elongation rate is appropriately adjusted by adjusting the heating temperature of the crimping nozzle. Thus, crimped yarns A-3 to A-4 (both examples of crimped yarn Y1) were produced. Table 1 shows the characteristics of the obtained crimped yarns A-3 to A-4.

(Crimped yarns B-1 to B-3)
In the same manner as the crimped yarn A-1, except that the base has a discharge hole shape for a round cross section and the crimping elongation rate is adjusted by adjusting the heating temperature of the crimping nozzle, Shrinked yarns B-1 to B-3 were produced. Table 1 shows the characteristics of the obtained crimped yarns B-1 to B-3.

(Crimped yarn C-1 to C-2)
Change to the die for Y-shaped cross section shown in Table 2, adjust the cross-sectional shape and degree of deformation by adjusting the relative viscosity of sulfuric acid, and adjust the crimping elongation rate by adjusting the heating temperature of the crimping nozzle. Crimped yarns C-1 to C-2 were produced in the same manner as the crimped yarn A-1, except for the adjustment. Table 1 shows the characteristics of the obtained crimped yarns C-1 to C-2.

(Crimp yarn D-1)
Melt a polypropylene polymer having a melt flow rate of 30 g / 10 min and a melting point of 164 ° C. measured under the conditions of a temperature of 230 ° C., a load of 21.18 N, and a die hole diameter of 2.095 mm. Spinning was performed with a die so that the cross-sectional shape of the obtained yarn had a triangular cross-section. The spun yarn is cooled and solidified by a uniflow-type chimney, and after being applied with an oil agent by an oil supply roll, it is stretched, and once wound up, it is rolled at 160 ° C. and 0.7 MPa by a Taslan type jet stuffer crimp nozzle. Crimping was imparted by superheated steam. Thereafter, the mixture was cooled and fixed by a rotary filter, and entangled by a entanglement nozzle, and a crimped yarn D-1 (an example of a crimped yarn Y1) having a total fineness of 1000 dtex and 68 filaments was obtained. Table 1 shows the characteristics of the obtained crimped yarn D-1.

(Crimped yarn E-1)
A crimped yarn is produced in the same manner as the crimped yarn A-1, except that the die has a discharge shape for a hollow core and the crimping elongation rate is adjusted by adjusting the heating temperature of the crimped nozzle. E-1 was produced. The characteristics of the obtained crimped yarn E-1 are shown in Table 1.

(Non-crimped yarn F-1)
Non-crimped yarn E-1 was produced by the same method as crimped yarn A-1, except that crimping was not performed. Table 1 shows the properties of the obtained non-crimped yarn E-1. Since E-1 is a non-crimped yarn, the evaluation results of the blended yarn and carpet obtained using the non-crimped yarn E-1 were used as reference values.

  Using each of the obtained crimped and non-crimped yarns, a tubular knitted fabric was produced, and the glossiness was measured. The results are shown in Table 1.

<Example 1>
The obtained crimped yarn A-1 and crimped yarn B-1 are aligned and stretch tension: 2.0 mN / dtex, running yarn speed: 800 m / min, air pressure: 0.8 MPa using an entanglement nozzle. Under such conditions, entangled and mixed fibers based on the ratio shown in Table 2 were obtained to obtain a mixed yarn (pile yarn) having a total of 2000 dtex. Using pile yarn, tufted carpet was prepared by tufting to 1/10 gauge, basis weight 650 g / m ² , and pile height 3.5 mm. Next, using a wins dyeing machine, dyeing is performed under the conditions of acid dye (Kayanol Navy Blue R manufactured by Nippon Kayaku Co., Ltd.) 0.5% owf, bath ratio 1: 100, pH = 7, 98 ° C., 30 minutes. went. About the obtained carpet, according to the following evaluation methods, glossiness, bulkiness, and appearance change were evaluated. The results are shown in Table 2.

(Glossy)
The glossiness was subjected to sensory evaluation based on the following criteria. Specifically, 10 evaluators were allowed to observe the carpet. At that time, the evaluator was allowed to move within a distance of 1 m from the carpet, and observed the glossiness by making a round around the carpet. The carpets were set at two locations, directly below the fluorescent lamp and at a location 1 m away from the fluorescent lamp, and the observation results of both were comprehensively determined. After the determination, the result with the largest number of determinations was taken as the respective glossiness. For example, if the number of judgments is the same for two, ○ and △, it is judged as △ to ○, and if the number of judgments is the same for three, ◎, ○, and △, it is judged as ◯. .
-Criteria A: Glossy glossiness was strongly felt, and there was a sense of gorgeousness and luxury.
○: A glittering gloss was felt.
(Triangle | delta): It felt that the glossiness was a little insufficient, or there was an unpleasant glossiness that was glaring on the whole.
X: It felt that glossiness was insufficient or was not seen.
(Bulky)
The bulkiness was sensory evaluated based on the following criteria. More specifically, ten evaluators confirmed the feel of the carpet. After the determination, the result with the largest number of determinations was taken as the bulkiness of each. For example, if the number of judgments is the same for two, ○ and △, it is judged as △ to ○, and if the number of judgments is the same for three, ◎, ○, and △, it is judged as ◯. .
-Judgment criteria A: There was a feeling of volume and I felt that the texture was very soft.
○: There was a volume feeling and the texture was soft.
(Triangle | delta): The feeling of volume was somewhat insufficient and the texture felt a little hard.
X: A feeling of volume was scarce and the texture was hard.
(Appearance change)
The change in appearance was measured by measuring the thickness reduction due to repeated compression specified in JIS L10227 and calculating the thickness reduction rate. It can be determined that the smaller the thickness reduction rate, the better the sag resistance. If the criterion is Δ or more, it can be practically used.
-Criteria A: The thickness reduction rate was 0 to 8%.
A: The thickness reduction rate exceeded 8% and was 12% or less.
(Triangle | delta): The thickness reduction rate exceeded 12% and was 18% or less.
X: The thickness reduction rate exceeded 18%.

<Examples 2 to 11 and Comparative Examples 1 to 4>
A tufted carpet was produced in the same manner as in Example 1 except that the kind of crimped yarn or non-crimped yarn constituting the mixed yarn and the ratio of the mixed yarn were changed as shown in Table 2. About the obtained carpet, according to the said evaluation method, glossiness, bulkiness, and the external appearance change were evaluated. The results are shown in Table 2. In Comparative Example 3, since the crimped yarn Y2 was used, the evaluation results of the difference in crimp elongation and the difference in glossiness were used as reference values.

  As shown in Table 2, the blends of Examples 1 to 11 using the crimped yarn Y1 and the crimped yarn Y2 and having a crimp elongation ratio difference R1-R2 (%) of 1 to 25% Among the properties of the resulting carpet, the yarn was excellent in glossiness and bulkiness. In particular, the carpets obtained using the mixed yarns of Example 1, Example 2, Example 7 and Example 11 having a large difference in glossiness G1 to G2 (%) are more excellent in gloss and show glamorous properties. I was able to give an impression. Further, the mixed yarns of Example 2 and Example 3 using the crimped yarn B-2 having a large crimp elongation rate R2 are more excellent in bulkiness of the resulting carpet, have less appearance change, and wear resistance. It was found that the property is excellent.

  On the other hand, the mixed yarns of Comparative Examples 1 to 4 in which the crimped yarn Y1 and the crimped yarn Y2 were not used, or the difference R2-R1 (%) in the crimp elongation rate was outside the range of 1 to 25%. Among the characteristics of the obtained carpet, the gloss was not sufficient or the bulkiness was inferior. In particular, the mixed yarns of Comparative Example 1 and Comparative Example 2 having a small difference in crimp elongation rate were not sufficiently glossy because the crimped yarn Y1 was easily hidden in the yarn bundle in the resulting carpet. In addition, the mixed yarn of Comparative Example 4 in which the crimped yarn Y1 and the non-crimped yarn were mixed had greatly reduced bulkiness (particularly volume feeling) and poor gloss in the resulting carpet. .

C1, C2 Reflectivity curve L1, L2 Baseline P1-P6 Reflectivity peak S1, S2 Area

Claims (9)

Including a crimped yarn Y1 having a triangular cross-section and a crimped yarn Y2 having a cross-section other than triangular,
The difference (R2−R1) between the crimp elongation rate R2 (%) after boiling water treatment of the crimped yarn Y2 and the crimp elongation rate R1 (%) after boiling water treatment of Y1 is 1 to 25. (%), Entangled mixed crimped yarn.   The entangled mixed crimped yarn according to claim 1, wherein a ratio (d2 / d1) of a circumscribed circle diameter d2 to an inscribed circle diameter d1 of the triangular cross section is 1.3 to 2.0.   Difference (G1-G2) between the glossiness G1 (%) of the tubular knitting produced using the crimped yarn Y1 and the glossiness G2 (%) of the tubular knitting produced using the crimped yarn Y2. The entangled mixed crimped yarn according to claim 1 or 2, which is 2% or more. In the chart of the glossiness G1 of the crimped yarn Y1, the reflectance curve has four reflectance peaks with respect to the baseline indicating the lowest reflectance,
The entangled mixed crimped yarn according to claim 3, wherein a ratio of a peak area of each of the reflectance peaks is 20% or more of a total peak area defined by the base line and the reflectance curve.   The entangled mixed crimped yarn according to any one of claims 1 to 4, wherein a single fiber fineness of the crimped yarn Y1 is 2 to 35 dtex.   The entangled mixed crimped yarn according to any one of claims 1 to 5, wherein the crimped yarn Y1 is a crimped yarn that has been crimped by a heated fluid jet textured process.   The entangled mixed crimped yarn according to any one of claims 1 to 6, wherein the crimped yarn Y1 is made of a polyamide fiber.   The entangled mixed crimped yarn according to claim 7, wherein the polyamide fiber is polycaproamide.   The carpet using the entangled mixed fiber crimped yarn of any one of Claims 1-8.

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