JP2009235619A - Multicolor blended crimped yarn and method for producing the same, and plain-toned carpet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multicolor blended crimped yarn uniform in color tone and having voluminous feeling, free from messy pattern often seen in a plain-toned carpet having deep hue of identical-color feeling, as the separated single crimped yarns after subjected to boiling water treatment of the crimped yarn with two or three crimped yarns differing in dyeability from each other combined together meet a specific elongation-percentage difference and yarn-length difference, and to provide such a plain-toned carpet having the multicolor blended crimped yarns. <P>SOLUTION: The multicolor blended crimped yarn which is 18-35% in crimp elongation percentage after subjected to boiling water treatment, is such that two or three crimped yarns differing in dyeability and/or color tone from each other are combined together. In the multicolor blended crimped yarn, the elongation-percentage difference is ≤4% and the yarn-length difference is ≤3% between the separated single crimped yarns after subjected to boiling water treatment. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention, when used for tufted carpets and the like, is a mixed-colored mixed-colored wrinkle that can produce a solid color pattern having a uniform and deep hue of the same color without the occurrence of pattern flow causing vertical lines The present invention relates to a crimped yarn, a method for producing the same, and a carpet having a uniform and deep solid color pattern without pattern flow using the different-color mixed crimped yarn.

  Traditionally, tile carpets have grown rapidly with a focus on demand for office buildings. In particular, tile carpets using different-colored mixed crimped yarns made of nylon BCF (Bulked Continuous Filament) have been required to have uniform, sharp patterns and high-contrast multicolor tone carpets.

  However, in recent years, with the diversification and individualization of buildings, tile carpets have been required to have high-quality interiors and excellent interior space performance, especially carpets with a uniform and calm atmosphere. . Therefore, there is a demand for a plain tile carpet having a deeper color tone, particularly in the case of different color mixed crimped yarns of the same color, which have different dyeing performance and / or different color tone. There was a drawback in that a slight difference in the crimp characteristics of the three types or three types of crimped yarns (hereinafter referred to as a split-crimped yarn) was easily visually recognized by the vertical muscles.

  The cause of the generation of the above-described warp is considered to be mainly due to the difference in the elongation rate and the length of each split crimped yarn after dyeing the different-color mixed crimped yarn forming the loop pile. That is, when the elongation rate level and yarn length level of each of the divided and crimped yarns after dyeing differ greatly, the color that occupies the surface of the loop pile differs depending on the piles that make up the carpet, and the slight amount of the plain tone carpet This is a phenomenon in which the color difference appears to be vertical.

  Conventionally, crimped yarns used for tile carpets are made by mixing two or more types of crimped yarns having different dyeing properties by entanglement to create a carpet pattern.

  In Patent Document 1, two types of two kinds of crimped yarns obtained by aligning or twisting any two types of crimped yarns having an elongation rate difference of 5 to 15% from among three types of crimped yarns having different dyeability. A technique is disclosed in which a pattern of a three-tone tone is obtained by alternately tufting two kinds of two-string yarn selected from yarns. The technique described in Patent Document 1 aims to create a three-color feeling with a pattern larger than that of a conventional carpet having a two-tone or three-tone pattern, and is a vertical stripe in a plain-tone carpet having the same color tone. It was not something to reduce.

  In Patent Document 2, when each of the mixed yarns is crimped individually by a crimping device, the entanglement of the raw yarns is reduced to a low entanglement of 10 or less so that high crimping is achieved at the time of crimping. A technique has been proposed for improving the contrast, the bulkiness of the carpet, and the volume feeling of the carpet by making the number of confounding within an appropriate range. Patent Document 2 describes that the pattern becomes dense when the number of entanglements is greater than 43 / m. However, if the number of entanglements is simply increased, the fiber mixing progresses, but since the fibers are excessively focused, there is a problem that the crimp is not expressed in the heat treatment and the volume feeling becomes poor.

  Furthermore, Patent Document 3 describes a stretch ratio when applying the draw entanglement after crimping the drawn yarns separately. Although it is described that the contrast may be weakened when the stretch rate is high, Patent Document 3 also specifies an appropriate range of the number of entangled mixed fiber crimped yarns for increasing the contrast, and the crimping process It only describes the method and does not disclose any different color mixed crimped yarns for use in plain carpets.

As described above, there has been obtained a plain carpet composed of different-colored mixed crimped yarns having a uniform and voluminous feeling without pattern flow and having a hue that cannot be expressed by a single crimped yarn, and a sufficient method for producing the same. There wasn't.
JP 11-113722 A (Claims, Examples) JP-A-11-61585 (Claims, Examples) JP-A-7-189067 (Claims and Examples)

  The present invention has been achieved as a result of studying the solution of the above-described problems in the prior art as an object.

  That is, an object of the present invention is to provide a solid-colored carpet having a deep, same-colored hue, a bulky different-colored mixed crimped yarn that suppresses the occurrence of pattern flow, and a volume-like plain-colored carpet using the same. It is to provide.

In order to solve the above-mentioned problems, the different-color mixed crimped yarn of the present invention, a method for producing the same, and a plain carpet have the following configurations.
(1) A different-color mixed crimped yarn having a crimp elongation of 18 to 35% after boiling water treatment, in which two or three types of crimped yarns having different dyeing performance and / or color tone are mixed. A different-color mixed-crimped yarn having a difference in elongation after boiling water treatment of each crimped yarn after splitting of 4% or less and a difference in yarn length of 3% or less.
(2) The different color mixed crimped yarn according to (1) above, wherein the number of entanglements is 28 to 43 / m.
(3) The different colored mixed crimped yarn according to (1) or (2) above, wherein the polymer constituting the different colored mixed crimped yarn is polyamide.
(4) Two or three types of multifilaments with different dyeing properties are crimped separately, stretched and aligned with a tension of 0.10 to 0.37 g / dtex, and entangled with 0.5 to 1 MPa of compressed air A method for producing a different color mixed crimped yarn.
(5) The different color mixed crimps according to (4) above, wherein the number of water entanglement before crimping of two or three types of multifilaments having different dyeability is 10 / m or less Yarn manufacturing method.
(6) A plain carpet, wherein the L value difference of each crimped yarn constituting the different color mixed crimped yarn according to any one of (1) to (3) is 5 to 15.

  According to the present invention, it is possible to provide a different color mixed crimped yarn having a uniform and voluminous feeling without pattern flow, a method for producing the same, and a plain tone carpet in a plain tone carpet having a deep and same color tone. .

  The different color mixed crimped yarn in the present invention has a crimp elongation of 18 to 35% after boiling water treatment in which two or three types of crimped yarns having different dyeing performance and / or color tone are mixed. Different colored mixed crimped yarns, characterized in that each crimped yarn after splitting has a difference in elongation after boiling water treatment of 4% or less and a yarn length difference of 3% or less. It is a different color mixed crimped yarn.

  That is, the crimp elongation after the boiling water treatment is 18% or more, and preferably 23% or more. If it is less than 18%, the occurrence of crimping in the dyeing or backing process becomes insufficient when the carpet is made, the bulkiness and volume feeling are unsatisfactory, and the effect of preventing joint space is also insufficient. On the other hand, if the crimp elongation after boiling water treatment exceeds 35%, when the carpet is finished after dyeing / backing, the occurrence of crimp is large, so the pile shrinks small, and the bulkiness is changed. It will decline.

  Furthermore, the two or three kinds of crimped yarns after the splitting after the boiling water treatment each have an elongation rate difference of 0% or more and 4% or less, and the length difference of each crimped yarn is It is characterized by being 0% or more and 3% or less. That is, the properties of the split crimped yarn after the boiling water treatment have the specific elongation rate level and the yarn length level, so that the color of the surface of the loop pile constituting the carpet is expressed uniformly, and the hue of the same color feeling A plain carpet having

  Here, it is preferable that the elongation difference of the split crimped yarn after the boiling water treatment is 3% or less. The yarn length difference is preferably 2% or less. If the difference in elongation exceeds 4%, and if the difference in yarn length exceeds 3%, the elongation is low and only the crimped crimped yarn occupies the loop pile surface and becomes a single color because of the longer yarn length. A slight color difference between adjacent loop pile yarns is not preferable because it causes warp.

  In the different color mixed crimped yarn of the present invention, the number of entanglements per meter is preferably 28 or more and 43 or less. If the number is less than 28, the pattern when used as a carpet is rough, and the tone-like pattern created by mixing the different-colored polymer yarns becomes rough, and the plain-tone carpet having the same color tone is deep. Cannot get color. In addition, if the number exceeds 43, the pattern of the carpet becomes too dense and the color feel is not sharp, and the number of entangled nodes is too large, so that the crimp characteristics inherent to the crimped yarn are It cannot be fully expressed by heat treatment in the dyeing or backing process. For this reason, the bulkiness and volume are likely to be insufficient.

  The different color mixed crimped yarn of the present invention needs to be composed of two or more types of crimped yarns having different dyeing performance and / or color tone in order to produce a plain carpet having the same color tone. In order to produce a deeper pattern and to give a high-class feeling, it is preferable to be composed of three types of crimped yarns.

  As the crimped yarn having different dyeing performance constituting the different-color mixed crimped yarn of the present invention, for example, if polyamide fiber is taken as an example, the amount of amino terminal group (-NH2) bonded to ordinary polyamide and acid dye is increased. And polyamides introduced with sulfo end groups (—SO 3) that bind to basic dyes. Examples of the polyamide of the present invention include polycapramide and polyhexamethylene adipamide, which are conventionally suitable materials for crimped yarns for carpets. A copolymer containing a copolymerization component may be used for improving the spinning property and improving the quality of the final product. An example of a preferable copolymer is polyamide obtained by copolymerizing 99 to 80 parts by weight of caprolactam and 1 to 20 parts by weight of hexamethylene adipamide, trimethylene adipamide, hexamethylene sebacamide and the like. Other polymers having amide bonds, copolymers thereof, and blends may be used.

  In the polymer, a matting agent such as titanium oxide, coloring pigments and dyes, a weather resistance agent, a heat resistance agent, an antioxidant and the like may be used in combination as necessary.

  As the heterochromatic polymer in the present invention, when it is dyed in the same bath, a multicolor feeling can be easily expressed, a variety of color tones, an easy spinning process, an easy crimping process, and the like. More preferably, polyamide is used.

  The fineness of the different color mixed crimped yarn used as the pile yarn in the present invention is preferably 2200 to 4200 denier. When the fineness is within this range, it is possible to easily produce a handle pattern having a bulky feeling and a volume feeling, and a good tone, and excellent stability in manufacturing. In order to control the bulkiness and volume of the carpet, generally a means for increasing the basis weight is used in combination, but if it is less than 2200 denier, it is necessary to increase the gauge or stitch to obtain a predetermined basis weight. Tufting tends to be difficult. That is, single yarn breakage and pile dropout occur frequently during tufting, and the process stability tends to be lacking. On the other hand, if the fineness exceeds 4200 denier, it is too thick to make tufting difficult. Further, when entanglement is lost as a whole, the loss becomes conspicuous.

  Further, it is preferable that the crimped yarns (differentiated crimped yarns) having different dyeing performance constituting the different-color mixed crimped yarns have substantially the same total fineness. “Substantially the same” means that the difference in the total fineness of the crimped yarn after splitting is within 5%, more preferably within 2%. When the difference in the total fineness of the split and crimped yarns exceeds 5%, the degree of mixing between the single yarns varies, and the effect of reducing the warp muscles does not appear. In addition, the characteristics of the crimped yarn having a high total fineness become dominant on the carpet surface, and when it is made into a carpet, it becomes a monotonous color feeling.

  The single yarn cross-sectional shape of the different color mixed crimped yarn in the present invention is not particularly limited. However, from the viewpoint of bulkiness and antifouling properties, a modified cross section such as a rice-type hollow, a Y-type cross-section, a Y-type hollow, etc. is appropriately used. It is preferable to use in combination.

  In the present invention, in order to obtain a higher quality carpet as a carpet, the above-described different-color mixed crimped yarn of the present invention is combined with other filaments as a part of a pile as long as the effect is not impaired. There is no problem in using it. For example, in order to lower the frictional voltage of the carpet, there is no problem with mixing fibers having antistatic properties.

  Hereinafter, the manufacturing method of the different color mixed crimped yarn in the present invention will be described. In the present invention, in order to produce a different color mixed crimped yarn for a plain-colored carpet having a specific range of elongation rate level and yarn length level after boiling water treatment, the final product is made of polymers that exhibit different color from each other. A method is adopted in which shrink yarns are produced simultaneously or separately and entangled by combining them. Here, in the production of crimped yarns, individual melt spinning, spinning oil, and drawn yarns are wound once, and these multiple types of drawn yarns are unwound and simultaneously applied with different nozzles. After that, it is possible to adopt a generally known method in which the fibers are arranged and then mixed and entangled.

  As the melt spinning apparatus used in the present invention, both an extruder-type spinning machine and a pressure-type spinning machine can be used, but the former is preferable in terms of product uniformity and yield in the spinning process.

  The melt-spun yarn is cooled and lubricated, and then stretched and heat-set as necessary. In stretching, a steam processing device or the like may be used in combination for the purpose of, for example, fixing the stretching point as an auxiliary. In the case of polyamide, since a certain degree of orientation and crystallization are required in order to give a high crimp in a later step, it is usually preferable to perform stretching 2 to 4 times.

  Subsequently, the drawn yarns having different dyeing performance and / or color tone are wound up once, and are unwound and individually crimped by a crimping device. The crimp may be applied by a normal heated fluid processing. For example, various crimp applying methods such as a jet nozzle type, a jet stuffer type, and a gear method can be adopted. JP 2004-84080 A As described above, the jet nozzle method is preferable in order to prevent false twisting of the yarn and to achieve high-crimping with stable quality and its manifestation. Further, for the purpose of fixing crimps, a cooling device and further a rotary filter may be combined as disclosed in Japanese Patent Laid-Open No. 5-32158.

  On the other hand, if the method of introducing the colored polymer yarns together and then leading them to the crimping nozzle and applying the crimps is difficult, it is difficult to obtain a high crimping property, and the splitting is a feature of the present invention. Elongation rate level and yarn length level in a specific range of crimped yarn cannot be obtained.

  Further, after crimping 2-3 kinds of multifilaments having different dyeability separately, they are stretched and aligned with a tension of 0.10 to 0.37 g / dtex.

  If it is less than 0.10 g / dtex, sufficient stretching is not performed, and the yarn length variation between single yarns increases. In addition, when it exceeds 0.37 g / dtex, the bulky synthetic fiber bundle is stretched and opened, and the fiber mixing of the single yarns having different dyeing properties also progresses by the pressure-air entanglement process described later, resulting in a weak contrast. Therefore, the bulkiness and volume feeling are unsatisfactory, which is not preferable.

  The yarn speed introduced into the crimp nozzle is preferably 2800 m / min or less, more preferably 500 to 2500 m / min. If it is too fast, it is difficult to fix the crimp after passing through the nozzle and to run stably, so it is difficult to obtain desired crimp characteristics. On the other hand, if it is too slow, production efficiency is poor, which is not preferable.

  When producing different color mixed crimped yarns, for the purpose of controlling the process passability and crimp characteristics, it is preferable to entangle the yarns to be introduced into the crimp nozzle in advance. In order to provide the high crimpability which is the object of the invention, it is preferable that the yarn provided to the crimp nozzle is hardly entangled. Specifically, the number of converging portions per meter (the number of water entanglement) measured by suspending the yarn before crimping on the water is 10 or less, more preferably 3 or less. Is preferred.

  Entanglement may be applied using an entanglement nozzle using compressed air. In order to impart high entanglement to a highly crimped crimped yarn, it is important to set the yarn traveling speed at the time of entanglement, the traveling yarn tension at the time of entanglement imparting, and the pressure of the compressed air to a predetermined level. That is, if the running yarn speed at the time of entanglement is too high, it is difficult for the single yarn to be opened and entanglement is difficult to occur, so that the yarn is run at 1500 m / min or less, preferably 1200 m / min or less. Further, if the running yarn tension is too high, the single yarn cannot be opened and high entanglement cannot be imparted, so the tension is set to 0.1 g / d or less, preferably 0.08 g / d or less. At that time, in order to make the individual tensions of the different color polymer yarns to be introduced into the entanglement nozzle as equal as possible and reduce the fluctuations, it is preferable to adjust the tension beforehand with a guide, a compensator or the like. Further, the pressure of the compressed air is set to 0.5 to 1 MPa in order to give a desired level of entanglement and the knot of the entanglement is not too stiff, but the predetermined entanglement is in consideration of the fineness and tension of the yarn. What is necessary is just to set suitably so that it may become a number.

  As described above, two or more kinds of crimped yarns made of a different color polymer are combined and entangled, and then wound into a cheese shape by a winder. If the winding tension here is too high, the crimpability tends to deteriorate during storage in the winding state, so that the winding tension is not too high to obtain the desired high crimp, for example 0.3 g / d. The following is preferred.

  The mixed fiber crimped yarn for carpet obtained in this way also has a high manifested crimp performance, so that the mixed fiber crimped yarn has a high crimp elongation of 18 to 35% measured after boiling water treatment. It becomes.

  This different color mixed crimped yarn for plain carpet is tufted, dyed and backed by a known method. As the dyeing method, continuous dyeing, wins dyeing, rope dyeing, etc. can be used without particular limitation.

  The carpet using the different color mixed crimped yarn of the present invention is in the range where the L value difference between the two or three types of crimped yarn constituting the pile yarn is 5 or more and 15 or less, particularly when the carpet is a loop pile tile carpet. When this condition is satisfied, it is possible to obtain a plain carpet that does not stand out easily. When the L value difference is 5 or more, it becomes difficult to obtain a monotone color tone. On the other hand, if the L value difference is 15 or less, the contrast does not become too strong, and a deep shade of the same color can be expressed.

  Hereinafter, the present invention will be described in more detail with reference to examples. Each physical property value in the above description and in the examples described below is specifically a value measured by the following method.

[Sulfuric acid relative viscosity]
A polymer sample was dissolved in 98% sulfuric acid at a concentration of 1% by weight and measured at 25 ° C. using an Ostwald viscometer.

[Total fineness]
JIS L 1013 (1999) 8.3.1 Positive fineness b) JIS L 0105 3.1 (1) according to method B, using 0.882 mN / dtex as the initial load and polyamide 4.5% as the official moisture content. ) Measured using the case of calculating from the absolute dry mix rate.

[Crimping elongation after boiling water treatment (unusual blended crimped yarn)]
The skeined yarn is allowed to shrink for 3 hours in a room with a room temperature of 20 ° C. and a humidity of 65%. Next, it is immersed in boiling water for 20 minutes and subjected to boiling water treatment. Next, the skeined yarn treated with boiling water is left to dry in the aforementioned room for 12 hours. An initial load of 0.0176 mN / dtex is applied to the sample yarn, and after 30 seconds, the sample length is marked to 50 cm (L1). Next, a constant load of 0.882 mN / dtex is applied to the same sample, and the length of the sample (L2) extended after 30 seconds is measured. The crimp elongation percentage G [%] after boiling water treatment was determined by the following formula.
G = {(L2-L1) / L1} × 100

[Crimping elongation after boiling water treatment, difference in elongation (split yarn)]
The skeined yarn is allowed to shrink for 3 hours in a room with a room temperature of 20 ° C. and a humidity of 65%. Next, it is immersed in boiling water containing an anthraquinone acid dye for 20 minutes and subjected to boiling water treatment. Next, the skeined yarn treated with boiling water is left to dry in the aforementioned room for 12 hours. An initial load of 0.0176 mN / dtex is applied to this sample yarn, and after 30 seconds, marking is made on a sample length of 50 cm. Next, the mixed entangled portion is released without applying excessive tension, and a normal polyamide crimped yarn (regular: Reg), a polyamide crimped yarn (deep: Deep) having an increased amount of amino end groups bonded to the acid dye. ), And identifies polyamide crimped yarns (cations) introduced with sulfo end groups that bind to basic dyes. The initial load of 0.0176 mN / dtex was applied to each sample yarn, and after 30 seconds had passed, the marked portions were measured, and regular, deep, and cation were respectively L′ 1 (Reg), L′ 1 (D), L '1 (C). Next, a constant load of 0.882 mN / dtex was applied to each of the same samples, and the lengths of the samples extended after 30 seconds were measured, and L′ 2 (Reg), L′ 2 (D), L′ 2 (C ). From the following formula, the splitting crimp elongation ratio G ′ [%] after boiling water treatment was determined for each split crimped yarn.
G ′ = {(L′ 2−L′1) / L′ 1} × 100

Moreover, the larger one of the absolute value of the value obtained by the following formula was employ | adopted for the crimp elongation rate difference of the split yarn after each boiling water process.
ΔG ′ (Reg−C) = G ′ (Reg) −G ′ (C)
Or ΔG ′ (D−C) = G ′ (D) −G ′ (C)

[Yarn length difference after boiling water treatment (split yarn)]
In L′ 2 (Reg), L′ 2 (D), and L′ 2 (C) measured by the crimp elongation rate of the split yarn after the boiling water treatment described above, L′ 2 (C ) Was 100% as a reference, and the yarn length H [%] was determined for L′ 2 (Reg) and L′ 2 (D).
H (Reg) = L′ 2 (Reg) × 100 / L′ 2 (C)
H (D) = L′ 2 (D) × 100 / L′ 2 (C)
Moreover, the larger absolute value of the values obtained by the following formula was adopted as the yarn length difference between the split yarns after each boiling water treatment.
ΔH ′ (Reg−C) = H ′ (Reg) −100
Alternatively, ΔH ′ (DC) = H ′ (D) −100

[Number of water entanglement]
Fill a 50 cm long bathtub with water and float the sample thread to be measured on the surface of the water so that no tension is applied. The number of nodal points on the surface of water per 50 cm is counted by n = 10, and converted to the number per 1 m to be the number of water entanglement.

[Entanglement characteristics of different color mixed crimped yarn]
LAWSON-HEMPHILL, Inc. An EIB-E (Electronic Inspection Board for Entmentment) manufactured by EIB-E was used, and the CV value, the number of entanglements and the number of entanglements were measured by the following methods.

A. CV value of the number of entanglements per meter 100m yarns are divided into units of 1m, and the number of entangled points determined by the method described later is obtained. That is, 100 points of entanglement per meter are obtained. When the standard deviation of the number of entanglements per 1 m of 100 points is σ [pieces / m] and the average value of the number of entanglements per 1 m of 100 points is X [pieces / m], CV = 100 σ / X is obtained. The numerical value CV is defined as a CV value [%]. This is a value indicating the degree of variation in the measured value.

  In the method of measuring the entanglement point, the yarn diameter is continuously measured 100 m in the longitudinal direction at intervals of 5 mm with a tension of 1/10 [mN / dtex] applied to the yarn. First, an average diameter Y [mm] is obtained from the average value of the 20001 yarn diameters thus obtained. Next, with a tension of 1/10 [mN / dtex] applied again to the 100 m yarn used to determine the average diameter Y, the yarn diameter was continuously measured. A node portion of 7 Y [mm] or less is defined as an entanglement point. Here, the node is a portion in which filament single fibers are entangled and converged and the diameter is smaller than before and after.

B. Average value of the number of entanglements per 1 m It is calculated as the average value X [number / m] of the number of entanglements per 1 m of the 100 points described above.

C. Number of entanglement of 70 mm or more In a measurement length of 100 m, the distance from one entanglement point to the next entanglement point is determined as the number of parts [pieces / 100 m] extending over 70 mm.

[L value]
The pile yarn was split, each split crimped yarn was wound on a plate, and the L value was measured using a spectrocolorimeter SM-P manufactured by Suga Test Instruments Co., Ltd. In the measurement, different portions of the plate winding were measured at n = 5, and the average value was obtained.

[Carpet vertical]
The obtained plain carpet (width 1m, length 10m) is placed under a 30W fluorescent lamp, and the surface of the carpet is observed along the tuft direction of the pile from a distance of about 3m. Was relatively evaluated as follows.
○: No pattern flow.
Δ: There is no clear pattern flow, but it looks streaky.
X: There is a pattern flow.

[Carpet color tone]
In the same manner as in the above case, the same color impression and surface uniformity in which the color density difference is deep in the gradation were observed, and the relative evaluation was as follows.
○: A deep, same-color sensation and a uniform surface.
Δ: Slightly inferior in color depth and surface uniformity.
X: There are light and dark spots for each pile, and the surface uniformity is inferior.

[Carpet volume]
The plain carpet obtained above was touched by 10 monitors and evaluated as follows.
○: Good resilience.
Δ: Slightly inferior in resilience.
X: Resilience is poor.

[Production of acid dye-dyed polyamide drawn yarn (A-1 to 3, B-1 to 3)]
A regular type nylon 6 chip having a relative viscosity of sulfuric acid of 2.8 and an amino terminal group (—NH ₂ ) amount of 4.5 × 10 ⁻⁵ mol / g was melted by an extruder type spinning machine, and the spinning temperature was 265 ° C. Spinning was performed using a mold hollow die. The spun yarn is cooled and solidified by a uniflow type chimney, and then an oil agent is applied by an oil supply roll, and after drawing at a total draw ratio of 2.5 times, the air pressure supplied to the entanglement nozzle is 5 / m. A stretched yarn of 890 dtex-54 filament was obtained by giving the number of water entanglement (A-1).

  Here, it produced similarly to A-1 except having changed the air entanglement number to 10 / m by changing the air pressure supplied to the confounding nozzle (A-2). Similarly, it produced similarly to A-1 except having changed the air entanglement number by changing the air pressure supplied to the confounding nozzle to 15 pieces / m (A-3).

Also, except for the amino terminal groups (-NH ₂₎ weight 4.5 × ¹⁰ -5 mol / g in the deep type having amino end groups (-NH ₂₎ weight 7.2 × ¹⁰ -5 mol / g is A -1 (B-1).

  Here, it was produced in the same manner as B-1 except that the air entanglement number was changed to 10 / m by changing the air pressure supplied to the entanglement nozzle (B-2). Similarly, it produced similarly to B-1 except having changed the air entanglement number to 15 pieces / m by changing the air pressure supplied to the confounding nozzle (B-3).

[Production of basic dyeable polyamide crimped yarn (C-1)]
A cationic type nylon 6 chip having a relative viscosity of sulfuric acid of 2.8 and a sulfo end group (—SO ₃ ) amount of 4.6 × 10 ⁻⁵ mol / g was melted with an extruder-type spinning machine, and the spinning temperature was 250 ° C. Spinning was performed using a mold hollow die. The spun yarn is cooled and solidified by a uniflow-type chimney, then stretched by applying an oil agent by an oiling roll, and then continuously steamed by a normal crimp nozzle without taking up once, with a steam pressure of 0.9 MPa and a nozzle temperature of 230 Crimp was imparted at 0 ° C., and after cooling and fixing, confounding was imparted by a confounding nozzle and wound up. Thus, a crimped yarn of 890 dtex-54 filament was obtained.

[Example 1]
The obtained two kinds of acid dye-dyed polyamide drawn yarns (A-1, B-1) are unwound from the package and aligned to obtain a jet nozzle (JN) described in JP-A-2004-84080. And using a crimp pressure of 0.5 MPa / crimp, individually applying a crimping treatment, and then applying a tension of 0.25 g / dtex, and then a basic dye-dyed polyamide crimped yarn (C-1 ), And three types of crimped yarns were aligned and entangled with an air pressure of 0.6 MPa to obtain a different color mixed dyed crimped yarn for 3 cm (2670 dtex-162 filament). Using the obtained different colored mixed crimped yarn as a pile yarn, tufting it with 1/10 gauge, basis weight 600 g / m ² , pile height 3.5 mm to produce a carpet, and then constructing a different colored mixed crimped yarn In a bath in which both an acidic dye and a basic dye satisfy the range where the difference between the three L values is in the range of 5 to 15, a plain carpet was obtained by dyeing according to a conventional method. As a result, as shown in Table 1, there was no pattern flow that caused the vertical streak when the carpet was used, it had a deep and same color feeling, and a good volume feeling.

[Examples 2 and 3]
Example 2 is a plain carpet in the same manner as in Example 1 except that the same three kinds of different color polymers as in Example 1 were used and the tension after crimping of 0.25 g / dtex was changed to 0.1 g / dtex. Got. Similarly, in Example 3, a plain carpet was obtained in the same manner as in Example 1 except that the tension after crimping was 0.35 g / dtex. As the result is shown in Table 1, in Example 2, since the tension after crimping is low, boiling of the acid dye dyeable crimped yarn (B-1) and the cationic dyeable crimped yarn (C-1) Elongation rate difference after water treatment is 4%, yarn length difference is 2.5%, deep yarn tends to occupy the surface slightly, slightly inferior surface uniformity, but no pattern flow, good There was a sense of volume. In Example 3, since the tension after crimping was high, the fiber mixing by the entanglement process proceeded, and the color tone and the volume feeling were slightly inferior, but the pattern flow was not seen, and it was sufficient as a plain carpet property. there were.

[Example 4]
Example 4 is the same as Example 1 except that (A-1, B-1) of the acid dye-dyed polyamide drawn yarn used in Example 1 was changed to (A-2, B-2). I got a carpet. As a result, as shown in Table 1, the number of entanglements of the raw yarn was slightly large, so that the color tone and the volume feeling were slightly inferior, but the pattern flow was not seen and it was sufficient as a plain tone carpet characteristic.

[Example 5]
Example 5 is the same as Example 1 except that the same three kinds of different color polymers as in Example 1 were used, and the crimped yarns were aligned to make 0.6 MPa air pressure of 1.0 MPa. I got a carpet. As shown in Table 1, the air pressure at the time of different color mixed fiber entanglement treatment was slightly high, so the fiber mixing progressed, the same color feeling with some depth was inferior, and the volume feeling was also slightly inferior, No flow was seen, which was sufficient for plain carpet characteristics.

[Comparative Examples 1 and 2]
In Comparative Example 1, (A-3, B-3) was used instead of (A-1, B-1) of the acid dye-dyed polyamide drawn yarn used in Example 1, and a 0.25 g / dtex cocoon was used. A plain carpet was obtained in the same manner as in Example 1 except that the tension after crimping was changed to 0.06 g / dtex. Similarly, Comparative Example 2 is a plain fabric in the same manner as in Example 1 except that an acid dye-dyed polyamide drawn yarn (A-3, B-3) is used and the tension after crimping is 0.4 g / dtex. Got the carpet. The results are as shown in Table 2. Since Comparative Example 1 has low tension after crimping, boiling of the acid dye dyeable crimped yarn (B-3) and the cationic dyeable crimped yarn (C-1) The elongation difference after water treatment was 6%, the yarn length difference was as large as 4%, and there was a pattern flow. In Comparative Example 2, the crimp imparting tension was high, so that the crimpability was increased and the volume feeling was insufficient. Moreover, since the elongation after boiling water treatment and the yarn length of each of the acid dye dyeable crimped yarns (A-3, B-3) are smaller than those of the cationic dyeable crimped yarn (C-1), There was a tendency for the dyed and crimped yarn to occupy the surface, lacking surface uniformity and pattern flow. Moreover, since both the comparative examples 1 and 2 have a large number of entanglements in the raw yarn, the individual crimping process tends to be insufficient, and the entanglement formation of the different color mixed crimped yarns becomes uneven, resulting in insufficient color tone and volume feeling. Met.

[Comparative Examples 3 and 4]
Comparative Example 3 is the same as Comparative Example 1 except that the same three kinds of different color polymers as in Comparative Example 1 were used, and the crimped yarns were aligned to set the 0.6 MPa air pressure to 1.1 MPa. I got a carpet. Similarly, in Comparative Example 4, a plain carpet was obtained in the same manner as Comparative Example 1 except that the air pressure was 0.4 MPa. As a result, as shown in Table 2, Comparative Example 3 was inferior in volume feeling because the air pressure during the different color mixed fiber entanglement process was high, and the number of entanglements increased. In Comparative Example 4, since the air pressure at the time of the different color mixed entanglement treatment was low, the number of entanglements was small, the surface was not uniform, and the color tone with depth was lacking. Further, since both of the comparative examples 3 and 4 have a large number of entanglements in the raw yarn, the individual crimping process tends to be insufficient, the entanglement formation of the different color mixed crimped yarns becomes uneven, and the color tone and volume feeling are insufficient. Met.

[Comparative Example 5]
Comparative Example 5 is the same as Comparative Example 3 except that the same three types of different color polymers as in Comparative Example 3 were used and the three types of L value difference 11 constituting the different color mixed crimped yarns were set to 25. Got the carpet. As shown in Table 2, the result of Comparative Example 5 is that the difference in elongation after boiling water treatment of the acid dyeable crimped yarn (B-3) and the cationic dyeable crimped yarn (C-1) is 6%. The difference in thread length was 4%, but no pattern flow causing vertical muscles was observed. However, it has not been possible to obtain a plain carpet having a deep contrasting tone and having a deep color tone.

Claims (6)

  A different color mixed crimped yarn having a crimp elongation of 18 to 35% after boiling water treatment in which two or three types of crimped yarns having different dyeing performance and / or color tone are mixed. A different colored mixed crimped yarn characterized in that the difference in elongation after boiling water treatment of each subsequent crimped yarn is 4% or less and the difference in yarn length is 3% or less.   2. The different color mixed crimped yarn according to claim 1, wherein an average value of the number of entanglement per 1 m is 28 to 43 / m.   The different color mixed crimped yarn according to claim 1 or 2, wherein the polymer constituting the different color mixed crimped yarn is polyamide.   Two or three types of multifilaments with different dyeing properties are crimped separately, stretched and aligned with a tension of 0.10 to 0.37 g / dtex, and entangled with 0.5 to 1 MPa of compressed air. A method for producing a different color mixed crimped yarn.   5. The method for producing a different color mixed crimped yarn according to claim 4, wherein the number of entangled water before crimping of two or three types of multifilaments having different dyeability is 10 / m or less. .   A plain tone carpet comprising the different-color mixed crimped yarn according to any one of claims 1 to 3, wherein the L value difference of each crimped yarn is 5 to 15. carpet.