JPS6249375B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an improved spunlike textured yarn, and more particularly to an improved two-layer structured yarn in which wrapped yarns are alternately wound around a core yarn in the form of twisted yarns. Conventionally, alternately twisted two-layer structured yarns using false twisting have been manufactured by the method described below. Generally, when two or more types of yarns with different elongations are fed to a supply roller in a lined state and twisted using a false twisting spindle, the yarns with lower elongations are difficult to stretch.
Since the yarn with high elongation, which constitutes the core of the yarn, stretches easily, it is twisted so as to surround the outer layer of the yarn. When this twisted yarn state is heat-set and then untwisted,
A crimped yarn with a two-layer structure is obtained in which the threads with low elongation serve as a core and the threads with high elongation surround the core in an alternately twisted manner. (Unexamined Japanese Patent Publication No. 49-72443,
49-47644) On the other hand, as another method for manufacturing the double-layered yarn having the above-mentioned configuration, the rotational torque of the core yarn in a twisted (false-twisted) state by a false-twisting spindle is utilized. It is also well known to wind the yarn while overfeeding it. (For example, see Japanese Patent Publication No. 45-28018.) In general, the wound yarn is wound around the core yarn in an alternately twisted manner, which is a drawback of ordinary woolly processed yarn fabrics due to its twisted yarn structure. It had the advantage of improving sliminess and softness, but on the other hand, due to the structure of the yarn, only the core yarn has stress against bending deformation, so when it is made into a woven or knitted fabric, it tends to lack resilience. It was hot. Moreover, the problem becomes more serious as thicker fabrics using thicker denier processed yarns become used, and the current situation is that the repellency is compensated for by resin processing. An object of the present invention is to improve the drawbacks of the conventional two-layer yarn as described above and to provide a two-layer yarn with resilience. In order to achieve the above purpose, the inventors of the present invention,
As a result of extensive research, we have found that core yarn contributes not only to the flexibility of woven and knitted fabrics, but also to repulsion, which is contradictory to that, and to various other textures and functionality, especially the contradictory aspects such as flexibility and repulsion. From the viewpoint of simultaneously satisfying the characteristics, it was found that it is important to use a denier yarn as the filament constituting the core yarn, leading to the present invention. Thus, according to the present invention, one of at least two kinds of filament yarns subjected to false twist and crimp processing is used as a core yarn, and the other filament yarn is wound around it, and constitutes a wound yarn. The filament yarn that makes up the core is a two-layer yarn in which some of the filaments are randomly mixed and interlaced with the filaments in the core, but the wound yarn as a whole is wound around the core yarn in an alternating manner. is composed of three or more types of single fibers with different filament deniers, where the thickest single fiber is 7 denier or more, twice the thickness of the thinnest fiber, and the number of filaments of the thickest fiber. is 30, which is the total number of filaments in the core yarn composition.
% or less is provided. The present invention will be explained in detail below. In conventional two-layer yarn, the core yarn consists of single fibers with a single denier, and when the single fiber denier is thin,
Although flexibility can be obtained, there is a problem of lack of repellency.Conversely, to solve this problem, if the single fiber denier is made thicker, although repellency can be obtained, the texture becomes stiff, so-called "Kanare". However, it was impossible to obtain the desired repellency. By the way, wool fabrics made of natural fibers have extremely good repellency, and one of the factors is that
It is thought that it contains single fibers of various thicknesses. Therefore, we thought that this problem could be solved by constructing at least the core yarn of the two-layer yarn from single fibers of various thicknesses, and conducted the following study. Various polyester filament yarns with an elongation of approximately 120% obtained by spinning at a speed of 3500 m/min (by stretching 1.55 times, the single fiber denier was 2 de,
3de, 5de, 7de, 10de, 15de filament bundles) and polyester filament yarn (225de/72fils elongation 360%) obtained by spinning at a speed of 1200 m/min, the former being a core yarn and the latter being wound. The attached yarn and the core yarn composition are arranged as shown in Table 1, and the yarn is combined using the guide 3 using the process shown in FIG. Supplied to air injection nozzle 6 for fiber/entanglement,
62 ^with overfeed rate 2% and compressed air pressure 4.5Kg/cm2
entanglements/m, and then a stretching ratio of 1.55
The temperature of the heater 8 is 170°C, the surface speed of the friction false twisting device 9 is 700 m/min, and the second delivery roller 10
Cheese 11
It was rolled up as a winding. The obtained processed yarn had a denier of approximately 290 denier and had a two-layer structure in which the low elongation yarn was arranged as the core yarn 12 and the high elongation yarn was arranged as the wrapped yarn 13, as shown in FIG. At that time, the core yarn is composed of 1 to 4 types of single fibers with different deniers, and each single fiber filament to be mixed, A, B, C, and D, has an equal amount of (single fiber denier) x (number of filaments). Mixed so that The fabric is 2/2 twill weave, warp 27.4/cm, weft 24.
It was woven at a density of 1/cm and the bending hardness and bending resilience were measured.

【table】

[Table] As can be seen from Table 1, it is not possible to satisfy hardness and repulsion at the same time with processed yarns that contain one or two types of single fibers that make up the core yarn, and only when three or more types of single fibers are used. It can be seen that a material with appropriate repellency was obtained. Moreover, the desired effect is obtained when the thickest fiber of the single fiber is 7 deniers or more and twice the thickness of the thinnest fiber, and the number of filaments of the thickest fiber is 30% or less of the total number of filaments in the core yarn. It has been obtained. In addition, in this type of two-layer structured yarn, the core yarn and the alternately twisted and wound yarn may separate, which may cause a practical problem. The structure needs to be stabilized. The interlacing may be applied before or after the false twisting process, but it is preferable to apply it before the false twisting process because a more stable structure can be obtained. The more entanglements you give to the yarn, the better.
Generally, when the entanglement treatment is performed, the interlaced portion and the spread portion become a repeating unit to form an entangled yarn, but in order to optimally carry out the present invention, the length of the entangled portion is long,
It is preferable to provide such entanglement that the length of the spread portion is short. Ideally, the entanglement applied to the raw yarn should be uniformly applied to the entire yarn, but from a practical point of view, the number of entanglements should be at least 30/m, preferably at least 45/m. A processed yarn that can be said to be within the scope of the invention is obtained. Note that the degree of entanglement is measured as follows. In other words, when the entangled raw yarn is floated in water in a container, the non-entangled part opens to several times the thickness, while the entangled point does not open.
Visually read the number of intersecting points. In the combination of two or more types of filaments in the present invention, at least
Use a yarn that can be stretched and false-twisted by 1.1 times or more, and a yarn that can be further stretched by 100% or more than the yarn with a high elongation. Most preferably, the yarn with lower elongation is a partially oriented filament yarn with an elongation of 100% or more and a draw ratio of 1.4 times or more can be adopted, and the yarn with higher elongation is an undrawn yarn with an elongation of over 250%. Use a combination of Furthermore, in the present invention, the term "filament yarn" refers primarily to polyethylene terephthalate, but it may also be one copolymerized with a third component in a proportion of 15 mol% or less. Further, the polyester may contain additives such as a dissipating agent, a coloring agent, and a twist retardant. Further, although the undrawn yarn and the partially oriented yarn may have the same filament cross-sectional shape, the content of the erasing agent, the presence or absence of the coloring agent, etc., at least any of these may be made different. In this case, the denier of the undrawn yarn and the partially oriented yarn should be selected according to the application, but in general, it is best to set the total denier to be denier of wrapped yarn/core yarn denier ≧0.7, and the former is 50 to 300 de, The latter is also preferably 50 to 300 de. In addition, the single fiber denier takes into account the stretching ratio during processing, and after processing,
A combination in which the single fiber denier of the wound yarn≦the core yarn is preferable, and it is particularly preferable that the single fiber denier of the wound yarn after processing is 3 de or less, and the single fiber denier of the core yarn is 3 de or more. By combining the yarns as described above, it is possible to obtain a woven or knitted fabric having bulkiness, a soft feel on the surface, and improved stiffness and resilience. Further, as the air injection nozzle, a generally used nozzle for interlace processing is suitable, and a Taslan nozzle can also be applied. Further, the material may be wound up once after the interlacing treatment, or may be false-twisted without being wound up. Preferably, the false twisting device is a circumferential friction false twisting device that can both false twist the yarn and send it out at the same time. As described above, according to the present invention, an improved alternately twisted two-layer structure can provide a spun-like woven or knitted fabric having appropriate twist texture, fullness, flexibility, and improved high resilience. Thread is obtained.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing one embodiment of an apparatus for manufacturing processed yarn of the present invention. FIG. 2 is an enlarged side view of a yarn structure showing one embodiment of the processed yarn of the present invention. 1, 2: Yarn, 3: Guide, 4: Tension device,
5: feed roller, 6: interlace nozzle, 7: first delivery roller, 8: heater,
9: false twisting tool, 10: second delivery roller, 11:
Winding cheese, 12: Core yarn, 13: Winding yarn.

Claims (1)

[Claims] 1 One of at least two kinds of filament yarns that have been subjected to a false twist and crimp process is used as a core yarn, and the other filament yarn is wound around it, and a part of the filaments constituting the wound yarn is a core yarn. The filament yarns constituting the core are composed of three or more types of filament yarns, which are randomly mixed and interlaced with other filaments, while the wound yarn as a whole is wound around the core yarn in an alternately inverted manner. Consisting of single fibers with different single fiber deniers, the thickest fiber of the single fiber is 7 denier or more and more than twice the thickness of the thinnest fiber, and the number of filaments of the thickest fiber is equal to the total filament of the core yarn composition. A double-layered yarn with improved repulsion, characterized by a repulsion of 30% or less of the number of yarns.