JPH07189058A - Multicolor-dyeing combined filament yarn and its production - Google Patents

Abstract

PURPOSE:To obtain multicolor-dyeing combined filament yarn capable of generating fine mottle by combining plural filament yarns having different dyabilities in an extremely uniform state. CONSTITUTION:This multicolor-dyeing combined filament yarn is obtained by a running-liquid entanglement treatment of plural kinds of filament yarns made of polymers having different dyabilities. In the multicolor-dyeing combined filament yarn, the difference among plural kinds of filament yarns is <=12% in boiling-water shrinkage and <=8.0% in elongation. The filament yarns are each substantially non- twisted. The multicolor-dyeing combined filament yarn is produced by supplying each of plural kinds of polymers having different dyabilities with each other to closely placed plural spinning-drawing apparatuses, spinning plural kinds of different yarns and subsequently subjecting the obtained filament yarns to drawing and heat treatments. These treatments are performed in such a manner as to make the differences among plural kinds of the filament yarns <=12% in boiling-water shrinkage and <=8% in elongation. These filament yarns are put together without winding and then subjected to a running-liquid entanglement treatment to obtain the objective multicolor-dyeing combined filament yarn.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixed yarn in which a plurality of filament yarns having different dyeability are mixed.

[0002]

2. Description of the Related Art A mixed fiber yarn composed of a plurality of synthetic fiber filament yarns having different dyeability has a conventional appearance because when dyed after weaving the dyed portion, the dyed portion appears unevenly and a peculiar appearance is obtained. There are more proposals.

For example, in JP-A-59-204937, polyethylene terephthalate and cationic dye dyeable polyester are mixed with a twisting machine (spreading twisted mixed fiber) to obtain the above-mentioned mixed yarn. It is disclosed. Further, in JP-A-49-19166, a basic dye-dyeable polyester and an acid dye-dyeable polyester are spun from the same spinneret and mixed (spinning mixed fiber). Obtaining a yarn is disclosed.

Further, JP-A-3-279428 discloses a polyester filament having a boiling water shrinkage of 7 to 12% and a polyester filament having a boiling water shrinkage of 5% or less, which are melt-spun at a take-up speed of 3000 m / min or more. It is disclosed that after spinning and drawing, the yarns are combined and entangled without being once wound.

[0005]

However, the above-mentioned prior art has the following problems. Sunahachi,
Since the manufacturing equipment is fixed in the spinning mixed fiber method, it is not suitable for high-mix, small-lot production, and it is difficult to finely control the physical properties such as heat shrinkage and elongation of each yarn.
It is not possible to make fine adjustments to the heather. The twist-twisted mixed fiber method is the most general and technically established method as a mixed fiber method, but when the yarn is once wound into a pan after spinning or unwound during the twisting. However, since some actual twist is applied to the yarns and the yarns are bundled, there is a problem that the fibers cannot be mixed sufficiently uniformly.

Further, according to the method disclosed in Japanese Patent Laid-Open No. 3-279428, it is possible to obtain a mixed fiber yarn without imparting a real twist to each yarn. Has a large difference in heat shrinkage ratio and difference in elongation between the two types of yarns, and thus the obtained mixed fiber has a core-sheath structure, and only one yarn appears on the surface, and the dyeability is remarkably different. When mixed with different polymer yarns, there was a drawback that a coarse heat was generated.

[0007] Therefore, the applicant of the present invention diligently researched the manufacturing technology of the different shrinkage mixed fiber using the spin-drawing apparatus such as the previously proposed Japanese Patent Laid-Open No. 1-221505, and improved the method and diverted it. As a result, they have found that a mixed fiber having extremely excellent uniformity can be obtained, and have arrived at the present invention.

That is, the present invention solves the above-mentioned problems, and an object thereof is to mix a plurality of filament yarns having different dyeability very uniformly.
It is intended to provide a hetero-dyed mixed yarn capable of generating fine heather.

[0009]

DISCLOSURE OF THE INVENTION The present invention is a multifilament yarn obtained by subjecting a plurality of filament yarns made of polymers having different dyeing properties to a fluid entanglement treatment, wherein the difference in boiling water shrinkage between the plurality of types of filament yarns is 12. % Or less, the difference in elongation is 8.0% or less, and each filament yarn is a substantially non-twisted yarn.
Such hetero-dyed mixed fiber yarns are produced by supplying polymers having different dyeability to adjacent spinning and drawing devices to spin a plurality of filament yarns, and the difference in boiling water shrinkage of the plurality of filament yarns is 12% or less, It is obtained by stretching and heat-treating so that the difference in degree becomes 8.0% or less, then once tying without winding, and then performing fluid entanglement treatment.

As the filament yarn of the present invention, a fiber-forming polymer such as polyester, polyamide, or polyolefin can be used. As the polyester, polyethylene terephthalate, polybutylene terephthalate, polyethyleneoxybenzoate, polydimethylcyclohexane can be used. Homopolyesters such as terephthalate and polypivalolactone, those obtained by copolymerizing these polyester components with isophthalic acid and sulfoisophthalic acid as secondary acid components, and polypyrene glycol and polyethylene glycol as secondary alcohol components. A polymerized product can be used.

As the polyamide, nylon 6,
Nylon 66, Nylon 610, Nylon 11, Nylon 12, Condensates of bis (paraaminocyclohexyl) methane and dodecanedioic acid, those copolymerized between these polyamide forming components, and other dicarboxylic acids and diamines. A polymerized product or the like can be used, and as the polyolefin, a homopolyolefin such as polyethylene or polypropylene, or a product containing a small amount of the second component can be used.

Further, as a combination of filament yarns having different dyeability, different types such as polyester and polyamide may be combined, but a copolymer of the same type of polymer is preferable because of easy post-processing and dyeing treatment. Therefore, it is preferable to select a combination whose dyeing properties are significantly different,
For example, a combination of polyethylene terephthalate and a cationic dyeable polyester can be used.
What is characteristic of the mixed yarn of the present invention is that firstly, the physical properties of a plurality of filament yarns composed of polymers having different dyeability are similar to each other, and secondly, each filament yarn is formed by actual twisting. The point is that the fibers are mixed without being bundled and forming a group.

First, the physical properties of each filament yarn will be described. In the mixed fiber of the present invention, the heat shrinkage rates of the respective filament yarns are very similar, and are different from so-called different shrinkage mixed fiber. For example, in the case of a copolyester such as a cationic dyeable polyester, the same stretching conditions and heat history as those of polyethylene terephthalate, for example, in the case of polyethylene terephthalate, the boiling water shrinkage is in the range of 6.0 to 8.0%. If the production is carried out under the conditions, a boiling water shrinkage ratio difference of 1.5% or more will occur with polyethylene terephthalate. In the present invention, the difference in boiling water shrinkage is set to 1.2% or less, preferably 0.8% or less by setting the conditions of both yarns, respectively. Further, the boiling water shrinkage of the mixed yarn of the present invention is preferably 5 to 10%.

Further, in the mixed fiber of the present invention, the difference in the elongation of each filament yarn is 8.0% or less, preferably 4.0% or less. It does not have a structure in which only one yarn such as a sheath shape appears on the surface. The total fineness of each filament yarn is 2
About 0 to 200 denier, the difference in fineness between the filament yarns is preferably 1/3 or less of the total fineness of the mixed yarns.

Next, the converging property of each filament yarn will be described. The mixed fiber of the present invention is one in which each filament yarn is mixed without being substantially bundled. This specifically means that each filament yarn has substantially no real twist. When the real twist is applied, the filament yarns are continuously bundled along the longitudinal direction, and even if the filament yarns are entangled, it is no longer possible to sufficiently uniformly mix them. Further, the number of twists of the actual twist is about 5 T / M such as that imparted by rotation of the spindle when winding up the pan in the stretching device, or untwisted twist imparted when unwinding the pan. Refers to the above.

The method for producing the mixed yarn of the present invention will be described below. The spinning / drawing apparatus used in the method of the present invention is a so-called spin draw (spin direct drawing) apparatus, and for example, those described in JP-A-1-221505 can be used.

FIG. 1 is an explanatory view showing the outline of such a spinning and drawing apparatus. As shown in the figure, in a normal spinning and drawing apparatus, a plurality of spinning series (weights) are provided side by side, and in the method of the present invention, two such weights are used as one set. In the figure, S is a spinning section, D is a drawing section, and the raw material polymer of each filament yarn stored in the pellet storage tanks 1a and 1b is melted by the melt extruders 2a and 2b to be gear pumps 3a and 3b.
Are melt-spun from the spinnerets 4a and 4b, respectively, and are individually cooled by the cooling devices 5a and 5b.

Next, the spun-cooled yarn is taken up by the first godet rollers 6a, 6b and subjected to a predetermined drawing with the second godet rollers 7a, 7b. The two drawn yarns are the second godet roller 7a of the right spinning system.
After the above yarns are combined and mixed and entangled by the fluid entanglement nozzle 8, they are wound into a package 9.

In the method of the present invention, the pellet storage tank 1 is used.
Raw material polymer chips with different dyeability to a and 1b, for example,
A polyethylene terephthalate chip is placed in the pellet storage tank 1a of the right spinning system, and a pellet storage tank 1 of the left spinning system 1a.
Cationic dyeable polyester chips are put into b.

Then, the spun yarn is attached to the first godet roller 6
a and 6b, and stretching is performed between the second godet rollers 7a and 7b. For example, in the case of polyethylene terephthalate and cationic dyeable polyester, the polyethylene terephthalate series is the speed of the first godet roller 6a. 1000-140
0 m / min, the surface temperature is 80 to 100 ° C., the speed of the second godet roller 6 b is 3000 to 4500 m.
/ Min, the surface temperature is preferably about 135 to 155 ° C., and under these conditions, the boiling water shrinkage is 7%.
Front and back drawn yarns can be obtained. Further, the cationic dyeable polyester series has a speed of the first godet roller 6a of about 1200 to 1800 m / min and a surface temperature of 8 mm.
0 ~ 100 ℃, the speed of the second godet roller 6b,
3000-4500 m / min, surface temperature 120
By setting the temperature to about 140 ° C., it is possible to obtain a yarn having the same heat shrinkage and elongation as the polyethylene terephthalate yarn. Further, the fluid entanglement treatment is 2.0 when the traveling speed of the yarn is about 3700 m / min.
15 to 60 pieces / m at a pressure of about 5.0 kg / cm ³
It is preferable to carry out so that the number of entanglements (hook method) becomes.

The mixed filament yarn obtained as described above is used by further twisting it as necessary or by twisting it with other yarns,
A heathered appearance can be obtained by dyeing only one filament yarn or dyeing each filament yarn in a different color.

[0022]

【Example】

(Example 1) A polyethylene terephthalate chip having an intrinsic viscosity (η) of 0.635 and a cationic dyeable polyester chip obtained by copolymerizing polyethylene terephthalate with 2.5 mol% of sulfoisophthalic acid were prepared, and the spinning drawing shown in Fig. 1 was performed. Put it in the chip storage tank of the device and
A dyed mixed yarn of d / 48f was obtained.

[Polyethylene terephthalate] Fineness 75d / 24f Melting temperature 287 ° C. First godet roller surface speed 1150 m / min Surface temperature 90 ° C. Second godet roller surface speed 3750 m / min Surface temperature 130 ° C.

[Cationic dyeable polyester] Fineness 75d / 24f Melting temperature 287 ° C First godet roller surface speed 1500m / min Surface temperature 87 ° C Second godet roller surface speed 3750m / min Surface temperature 146 ° C Entanglement treatment 30 pieces / m Each filament The physical properties of the yarn are shown in Table 1.

[0025]

[Table 1]

Next, after 300 T / M additional twisting is applied to the mixed yarn, the plain weave is woven using this as the warp and weft,
When it was dyed gray with a cationic dye, it had an appearance of uniform and fine heather.

[0027]

EFFECTS OF THE INVENTION According to the present invention, it is possible to obtain a fiber product having a fine heathered appearance which cannot be obtained by the conventional hetero-dyed mixed yarn. Further, the method of the present invention can produce such a heterochromatic dyed yarn extremely efficiently, and its usefulness is clear.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an outline of a spinning / drawing apparatus used in the method of the present invention.

Claims (2)

[Claims] 1. A multifilament yarn obtained by subjecting a plurality of filament yarns made of polymers having different dyeing properties to a fluid entanglement treatment, wherein the difference in boiling water shrinkage between the plurality of filament yarns is 1.2% or less, and the elongation The heterochromatic dyed yarn, wherein the difference is 8.0% or less, and each filament yarn is substantially untwisted. 2. A plurality of filament yarns are spun by supplying polymers having different dyeability to adjacent spinning and drawing devices, and the difference in boiling water shrinkage ratio between the plurality of filament yarns is 1.
2% or less, stretched so that the difference in elongation is 8.0% or less,
A method for producing a hetero-dyed mixed fiber, which comprises heat-treating, then winding the yarn without winding it, and then subjecting it to a fluid entanglement treatment.