JP2012067414A - Method for producing multicolor dyeable combined filament yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a multicolor dyeable combined filament yarn that comprises multicolor dyeable filaments uniformly combined in a degree of a monofilament, and is dyeable to provide a hue rich in aesthetically appreciable property which cannot be obtained by a single color.SOLUTION: A multicolor dyeable combined filament yarn Y is produced as follows. Pluralities of spun-dyed long filament bundles A, B having different colors are respectively opened to become flat yarns. The flat yarns are superposed in a thickness direction of the flat shape. The resultant is passed through 2 sets of nip rollers having a different peripheral speed in the order of a low speed nip roller set R1 and a high speed nip roller set R2. At that time, each set of nip rollers holds the flat yarns between the rollers in the thickness direction to keep the flat shape. The flat yarns are stretch-broken between the 2 sets of nip rollers and then passed through air injection nozzles N1,N2 and combined.

Description

  The present invention relates to a method for producing a mixed dyed yarn. More specifically, the technology for mixing fibers with different dyeability has been advanced, and fibers with different dyeability have been mixed uniformly and mixed at the level of a single fiber. The present invention relates to a method for producing a fine yarn.

In textile products used for clothing, interiors, bedding, vehicle interiors, etc., hue is an important factor that determines the value of the product.
Therefore, in this field, there is a demand for shades that can increase the value of the product. Fortunately, in addition to dyeing all of them in the same color, the fibers are dyed in a shade in which multiple colors are mixed by mixing fibers with different dyeability. It has the potential to create new shades.

  Products using different dyeing composite yarns are disclosed in, for example, Patent Documents 1 to 8 (Japanese Patent Laid-Open Nos. 49-13383, 52-74053, 56-58079, 58-95). No. 163751, JP-A-5-279970, JP-A-6-173175, JP-A-7-34388, JP-A-7-54280) and the like, Alternatively, it is dyed on one side to obtain a different dyeing effect.

In order to uniformly mix these short fibers having different dyeing properties, each raw cotton lump is passed through the blended cotton process, the carding process and the kneading process several times by a known spinning method. I went to open and split many times.
However, in any process, even if a large lump of intertwined raw cotton can be made into a fine lump, it is difficult to open and divide it to the level of a single fiber.

  Moreover, there are generally differences in fineness, crimp characteristics, fiber length differences, cross-sectional shape differences, frictional characteristics differences, oil characteristics differences, etc. due to differences in raw materials and manufacturing conditions between raw cottons with different dyeability. There are also problems such as affecting the spreadability and splitting property of the fiber, hindering uniform blending, restricting the raw cotton that can be used, and separating the fibers once they are blended in the subsequent dyeing process.

  In addition, when a fiber lump of raw cotton remains in the yarn finally obtained, the contrast of the different color becomes stronger, and when it is combined with the twist of the spun yarn, it becomes a marbling or a streak or Moire-like spots are noticeable, and the aesthetics of the product are impaired, which is not preferable.

  As a method of reducing the size of the residual fiber lump, it is necessary to reduce the difference in physical properties between the differently dyed raw cottons until now, or to pass through the mixed cotton process, the wadding process, and the kneading process many times. In order to obtain a yarn having a uniform color at the level of monofilament and short fibers with different color and having a aesthetically pleasing hue, the above method is not limited to the above troublesome work. It requires skilled skills to use well.

  In addition, these raw cottons are random in the fiber arrangement and have a lump shape due to entanglement and crimping. In any of the spinning processes described above, they are gripped by rollers, needle cloths or combs and actively move. There is always a floating fiber mass that moves while being dragged by entanglement, crimping, friction, etc., without being niped, and the raw cotton is uniformly mixed at the single fiber level. The reality is that it is extremely difficult to do.

JP-A-49-13383 JP-A-52-74053 JP 56-58079 A JP 58-163751 A JP-A-5-279970 JP-A-6-173175 JP-A-7-34388 Japanese Patent Laid-Open No. 7-54280

  The present invention provides a method for producing a differently dyed mixed yarn, in which fibers having different dyeing properties are uniformly mixed and compounded at the level of a single fiber, and can be dyed in an aesthetically rich hue that cannot be produced with a single color. Is.

  The present inventor has studied to solve the above problems and has reached the present invention. Thus, according to the present invention, a plurality of long fiber bundles having different dyeing properties are flattened to form flat yarns, which are superposed in the thickness direction of the flats, and these are set in two sets having different peripheral speeds. Pass the nip roller through the low-speed nip roller and then the high-speed nip roller in this order, holding the flat yarn in the thickness direction so that the flat state is maintained in any nip roller. The flat yarn is checked between the two sets of nip rollers, and then knitted through an air jet nozzle.

  According to the present invention, there is provided a differently dyed mixed yarn in which fibers having different dyeability are uniformly mixed at the level of a single fiber, and which can be dyed in an aesthetically rich hue that cannot be obtained by a conventional mixed yarn. In addition to this, the labor of changing the lot in production can be greatly reduced compared to conventional spinning.

(1) is a schematic view showing an example of an apparatus for carrying out the present invention, (2) is a superposition of flat yarns in which long fiber bundles A and B are opened after passing through the guide G3 in (1). It is the schematic which shows the perspective view of the part supplied to the nip roller R1. It is a schematic diagram which shows an example of the side surface of the different dyed mixed yarn obtained by this invention. (1) is a schematic view showing an example of a cross section of a differently dyed mixed yarn obtained in the present invention, and (2) is a schematic view showing an example of a cross section of a conventional blended yarn. It is the schematic diagram which showed the mode until one fiber is nipped between nip roller R1, R2 of FIG. 1 until it checks out in order of (1) to (3). (1) is a schematic diagram showing the side of a yarn after dyeing and heat shrinking a blended yarn composed of two types of short fibers having different dyeability obtained by a conventional spinning method, and (2) is obtained by the present invention. It is a schematic diagram which shows the side surface of the thread | yarn after dyeing | staining and heat-shrinking the differently dyed mixed yarn.

  The present invention is a method of producing a mixed dyed yarn using a plurality of long fiber bundles having different dyeing properties. As a material constituting the plurality of long fiber bundles, polyesters such as polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polytriethylene terephthalate, aliphatic polyamides such as nylon 6 and nylon 66, aromatic polyamides, Examples thereof include polyolefins such as polyethylene and polypropylene. The plurality of long fiber bundles having different dyeing properties may be the same type of material or different types of materials.

  That is, as the fibers having different dyeing properties, fibers made of different kinds of polymers, those made of the same kind of polymers, modified on one side, and those obtained by adding a pigment to one of the fibers can be used. In the present invention, it is preferable that all the fibers having different dyeing properties are made of polyester fibers in order to obtain the effect of different dyeing without separating physical properties and fibers having different dyeing properties in dyeing as described later.

  Specific examples of the polyester fibers having different dyeing properties include, for example, JP-A-49-13383, JP-A-52-74053, JP-A-56-58079, JP-A-58-163751. The fibers constituting the differently-dyed composite yarns and the like shown in JP-A-5-279970, JP-A-6-173175, JP-A-7-34388, JP-A-7-54280, etc. are employed. can do. Particularly preferred is a combination of polyethylene terephthalate fibers and polyethylene terephthalate polyester fibers obtained by copolymerizing sulfonic acid metal, particularly 5-sodium sulfoisophthalic acid, in an amount of 2.0 to 4.5 mol% with respect to the acid component.

  The total fineness of each long fiber bundle used in the present invention is preferably 100 to 10000 dtex, more preferably 500 to 5000 dtex, and the single fiber fineness is preferably 0.1 to 20 dtex, More preferably, it is 0.5 to 10 dtex. Further, the total fineness and single fiber of each long fiber bundle may be the same or different.

  In the present invention, a plurality of long fiber bundles having different dyeing properties are flattened to form flat yarns, which are overlapped in the thickness direction of the flats, and these are combined into two sets of nip rollers having different peripheral speeds. Passing through the low-speed nip roller and the high-speed nip roller in this order, holding the flat yarn in the thickness direction so as to maintain the flat state in any nip roller, and The flat yarn is checked between two sets of nip rollers, and then knitted through an air jet nozzle. By such a method, fibers having different dyeability are uniformly mixed at the level of single fibers, and after the dyeing, a mixed yarn having an unprecedented color with rich aesthetics can be obtained for the first time.

  In other words, a plurality of long fiber bundles having different dyeability that are spread flat and fibers are arranged in parallel are overlapped in the thickness direction of the flat, and a pair in the thickness direction of the flat is maintained so as to maintain the flat state. By gripping with a low-speed nip roller, a fiber bundle is obtained in which each fiber is mixed in pieces without causing each fiber to form a large lump.

  In addition, even with a high-speed nip roller, a flat yarn made of long fibers of different colors fed from a low-speed nip roller is gripped in the thickness direction of the flat so as to maintain the flat state, and between the nip rollers. Then, the flat yarn is checked. At this time, the small-fiber lumps of the respective colors remaining in the flat yarn are reduced corresponding to the peripheral speed ratio of the high-speed nip roller and the low-speed nip roller.

  Furthermore, the flat yarn fed from the low-speed nip roller is held and checked one by one in the order of arrival at the high-speed nip roller, so that each fiber is mixed at the single fiber level. Is obtained.

  In the present invention, after the above process, the fiber bundle sent from the high-speed nip roller is entrapped through the air injection nozzle, and even in this case, each fiber is disturbed by the air injection nozzle, and more A fine mixed state can be obtained.

  Next, an embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 (1) is a schematic view showing an example of an apparatus for carrying out the present invention, and FIG. 1 (2) is a view of each of the long fiber bundles A and B opened in FIG. 1 (1) after passing through the guide G3. It is the schematic which shows the perspective view of the part which piles up a flat thread and supplies to nip roller R1.

  That is, in FIG. 1, the long fiber bundles A and B having different dyeing properties are passed through the opening guides G1 and G2, respectively, while being bent and thinly opened, and then superposed in the thickness direction, then opened. The fine flat yarn is passed through the low-speed nip roller R1 and the high-speed nip roller R2 having a higher peripheral speed. At that time, the flat yarn is sandwiched in the thickness direction so that the flat state is maintained in both nip rollers. Then, the flat yarn composed of the long fiber bundles A and B is checked between the nip rollers, and then the fiber bundle checked using the air ejection nozzle N1 between the nip rollers R2 and R3 is used. Then, the fiber bundle is conjugated by using the air ejection nozzle N2, and the fiber oil agent is applied by the oiling device O and wound around the winder W to produce the differently dyed mixed yarn of the present invention. It can be.

  In order to facilitate checking between the nip roller R1 and the nip roller R2, it is preferable that the yarn supplied to the nip roller R1 is not twisted or entangled. Moreover, although the fiber oil agent may be provided to this yarn, the oil agent with little convergence property and friction and being hard to generate static electricity is preferable. That is, twisting, entanglement, static electricity, fiber oil agent convergence, friction, and the like are not preferable because check spots are likely to occur.

  Further, as the opening guides G1 and G2, a plurality of known cylindrical or spindle-shaped rod-shaped guides in which the central portion is expanded are arranged in parallel, or a plurality of guides obtained by bending the rod-shaped guide into an arc shape are arranged. Can be used. As the opening guide, ceramic, metal or the like can be arbitrarily adopted.

  In addition, if the guide G3 which restricts and reduces the width | variety of the opened flat yarn in the part just before the nip roller R1 behind the said opening guide is provided, the fiber density of a flat yarn end part will increase. The fiber wrapping around the nip roller R1 can be prevented, which is preferable.

  The ratio of the peripheral speed of the nip roller R1 to the peripheral speed of the nip roller R2 is preferably 1: 8 to 1:40, and more preferably 1:10 to 1:30. That is, when the ratio of the peripheral speeds is less than 1: 8, it is necessary to increase the peripheral speed of the nip roller R1, so that the fiber end after the checkout is easily wound around the ratio. The thickness ratio of the check yarn due to spots increases, which is not preferable.

  FIGS. 4 (1), (2), and (3) show a model in order from one fiber being nipped between the nip rollers R1 and R2 until being checked out. As can be seen, the check fiber is stretched at different magnifications in the length direction, and the check fiber composed of one long fiber bundle A is compared with a region Al having a relatively low thermal shrinkage in the length direction. Region Ah is formed. Also in the check fiber obtained from the other long fiber bundle B, a region B1 having a relatively low heat shrinkage rate and a region Bh having a relatively high heat shrinkage rate are formed in the length direction.

  In a blended yarn in which two types of cotton having different dyeability are blended by a conventional spinning method, as shown in FIG. 5 (1), cotton having a high heat shrinkage rate is in the core and cotton having a low heat shrinkage rate is the sheath. There is a problem of separation into parts. On the other hand, in the mixed dyed yarn of the present invention, the high heat shrink regions Ah and Bh of the check fibers of the long fiber bundles A and B to be combined are in the core portion, and the low heat shrink regions Al and Bl are in the sheath portion. It has an advantageous characteristic that a uniform mixed state as shown in FIG.

  Moreover, it is preferable to provide the guide G4 which interrupts | blocks the accompanying flow of the air which generate | occur | produces on this roller surface in the nip roller R2 flow toward a roller edge part direction at a nip point. That is, if the accompanying flow is not interrupted, it tends to be difficult for the tip of the fiber fed from the nip roller R1 to stably nip the nip roller R2. Absent.

  Further, as the air injection nozzle N1, a nozzle having a suction action is used so that the check fiber carried out from the nip roller R2 does not stick to the roller, but it has a turning action simultaneously with the suction action. Use of a nozzle is preferable because fibers can be sucked more effectively.

On the other hand, as the air ejection nozzle N2, depending on the purpose, the fiber end is wound around the checked fiber bundle by a swirl flow and bound and conjugated, or the fibers in the checked fiber bundle are disturbed and entangled. Conjugates can be used.
Further, as the oiling device O, an oiling roller type or an oiling guide type device can be used, and an oil agent can also be selected according to the purpose.

  According to the production method described above, a differently dyed / mixed yarn comprising a plurality of fibers having different dyeing properties, each of which is a fiber in which a long fiber bundle is checked, It is possible to obtain a mixed dyed yarn having high aesthetics, in which single fibers having the same color in the cross section of the yarn do not exist as a bundle of five or more fibers.

As an average fiber length of the single fiber which comprises the said different dye mixed yarn, 5-150 cm is preferable, 10-30 cm is more preferable, 10-25 cm is further more preferable. If the average fiber length is less than 5 cm, fluff is likely to occur, and it is difficult to form a check yarn. If it exceeds 150 cm, the aesthetics are deteriorated and a spun-like texture tends to be not obtained.
Furthermore, the above-mentioned differently dyed mixed yarn is used as it is, twisted, combined or twisted according to the purpose.

  Different dyed mixed yarns obtained by the above method are disclosed in, for example, JP-A-49-13383, JP-A-52-74053, JP-A-56-58079, JP-A-58-163751. Japanese Unexamined Patent Publication No. 5-279970, Japanese Unexamined Patent Publication No. 6-173175, Japanese Unexamined Patent Publication No. 7-34388, Japanese Unexamined Patent Publication No. 7-54280, etc. As a result, a mixed yarn excellent in aesthetics can be obtained.

  EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited to this.

[Example 1]
Using the production apparatus shown in FIG. 1, first of all, the long fiber bundles A and B are all made of a polyester dyeable polyethylene terephthalate polyester obtained by copolymerizing polyethylene terephthalate and 2.6 mol% of 5-sodium sulfoisophthalic acid, respectively. Using a long fiber bundle (manufactured by Teijin Fibers) with a fineness of 1400 dtex, 600 filaments, and an oil adhesion amount of 0.4%, it is unwound in the opposite direction of winding while rotating the bobbin so that twist does not enter during unwinding. However, the thin filaments are flattened thinly by about 10 mm width through the spread guides G1 and G2, respectively, and further superposed in the thickness direction, and the width of the spread is regulated and reduced to about 7 mm using the guide G3. Was supplied to the nip roller R1.

  Next, the flat yarn is checked between the nip roller R1 and the nip roller R2 (circumferential speed 1000 m / min) whose peripheral speed is 14.5 times faster than this, and subsequently between the nip roller R2 and the nip roller R3. The fiber bundle is conjugated using the air injection nozzle N1 for suction and the air injection nozzle N2 for conjugation using a swirl flow, and the oil agent is applied by the oiling device O, wound by the winder W, the total fineness is 193 dtex, A differently dyed polyester blend yarn having a side surface in which the ends of the fibers are wound and bound to a substantially untwisted fiber bundle as shown in FIG. 2 having an average length of a single fiber of 50 cm was obtained.

  Further, the obtained differently dyed polyester blend yarn is twisted at 450 times / m and woven into a plain fabric with a warp density of 72 / inch and a weft density of 48 / inch, and then a disperse dye and a cation When dyeing is performed with different colors using dyes, each color is uniformly mixed at the level of a single fiber without causing the fibers of different colors to become clumps, streaks, or moire. A highly sensitive fabric having a rich hue was obtained.

[Example 2]
Using the manufacturing apparatus shown in FIG. 1, the long fiber bundles A and B used in Example 1, and the long fiber bundle C as a total fiber fineness of 700 dtex made of black original polyester, the number of filaments of 300, and the amount of oil attached 0 A 195 dtex effect is obtained in the same manner as in Example 1 except that a ratio of the peripheral speed of the nip roller R1 to the peripheral speed of the nip roller R2 is 1:18 using a 4% long fiber bundle. A monochromatic polyester mixed yarn having an average single fiber length of 50 cm was obtained.

  Using the obtained differently dyed polyester blended yarn, weaving into a plain woven fabric in the same manner as in Example 1 and dyeing with different colors, the three colors do not become lumpy, streaky, marbling, or moire spots, respectively. As a result, a woven fabric having a deep, aesthetically pleasing sensibility shade in which each color was uniformly mixed and mixed at the level of a single fiber was obtained.

[Comparative Example 1]
1. Using a conventional spinning device, each of a polyester dyeable polyethylene terephthalate-based polyester copolymerized with 2.6 mol% of polyethylene terephthalate and 5-sodium sulfoisophthalic acid, each having a short fiber length of 51 mm and a single fiber fineness of 2. 1 dtex raw cotton was blended at a ratio of 50:50 using a known method to obtain 30th-dyed polyester blended yarn.

  Furthermore, when the obtained differently dyed polyester blended yarn was used for weaving and different color dyeing in the same manner as in Example 1, only one color was conspicuous even though the differently dyed raw cotton was blended at a ratio of 50:50. In addition, the fabric was not aesthetically pleasing such as the appearance of streaks and marbling mixed-colored cotton spots, and a highly sensitive fabric as obtained in Example 1 was not obtained.

  In addition, using the dyed differently dyed polyester mixed yarn and the differently dyed polyester mixed spun yarn obtained in Example 1 and Comparative Example 1, at any five locations in the length direction of the yarn, as shown in FIG. The number of fibers of the same color on the diameters XX ′ and YY ′ of the yarns perpendicular to the center of the cross section was counted, and the average value Av and the difference R between the maximum number and the minimum number were calculated. The differently dyed polyester blended yarn of Comparative Example 1 has Av = 2.8 and R = 5, whereas the differently dyed polyester blended yarn of Example 1 has Av = 1.4 and R = 2. As a result, it was found that the fibers were uniformly mixed at the single fiber level.

  According to the present invention, it becomes possible to uniformly mix composites having different dyeing properties at the level of single fibers, and by giving dyeing, different dyed mixed yarns having unprecedented aesthetic hues. Is obtained. For this reason, it is possible to provide a product with a high commercial value, which is made of mixed yarn having a aesthetically rich hue, which is obtained for the first time by the present invention in clothing, interior, bedding, vehicle interior, and the like.

A, B: long fiber bundles G1, G2 having different dyeing properties: spread guide G3: flat yarn width adjusting guide G4: air wake blocking guide R1: low speed nip roller R2: high speed nip roller R3: nip roller N1, N2: Air ejection nozzle O: Oiling device W: Winder Y: Different dyed yarn

Claims (4)

  A plurality of long fiber bundles with different dyeing properties are each flattened into flat yarns, which are overlapped in the thickness direction of the flat, and these are combined into two sets of nip rollers with different peripheral speeds, and a low-speed nip A roller and a high-speed nip roller are passed in this order. At that time, the flat yarn is sandwiched and held in the thickness direction so that the flat state is maintained in any nip roller, and the two sets of nips are A method for producing a differently mixed yarn, characterized in that the flat yarn is checked between rollers, and then knitted through an air jet nozzle.   The method for producing a differently dyed mixed yarn by twisting the differently dyed mixed yarn according to claim 1, wherein each of the plurality of long fiber bundles having different dyeing properties is made of polyester.   The manufacturing method of the differently dyed mixed yarn which twists the differently dyed mixed yarn of Claim 1 or 2.   The manufacturing method of the different dye mixed fiber composite yarn which mixes a plurality of different dye mixed yarns in any one of Claims 1-3, or twists together.

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