JPS6231093B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing a bulky textured yarn by subjecting a plurality of yarns to a fluid agitation process, and more specifically to a method for manufacturing bulky textured yarn that is soft, stable against tension in the yarn axis direction, and The present invention relates to a method for producing bulky textured yarn with excellent processability. In general, multifilament yarns have a cold feel or a unique slimy feel compared to spun yarns, and fabrics knitted with them have low heat retention and lack warmth in both feel and appearance.
For this purpose, a method has been discovered in which multifilament yarns are subjected to fluid agitation treatment. In this method, if appropriate fluid nozzles and processing conditions are selected, rings and loops can be sufficiently generated, but there is a problem that the stability against tension in the yarn axis direction is low, and rings and loops tend to disappear when tension is applied. , thus limiting the processing speed or requiring a large amount of fluid. On the other hand, a method has also been found in which a plurality of threads are supplied to a fluid disturbance chamber at different supply speeds and simultaneously subjected to fluid disturbance processing. According to this method, the yarn fed at a low speed receives tension in the yarn axis direction, and loops, slack, rings, etc. occur in the yarn fed at a high speed, resulting in a bulky yarn with excellent post-processability. A bulky textured yarn is obtained. However, even with this method, when ordinary drawn yarn is used as the yarn, the gloss peculiar to the drawn yarn is noticeable, the loops are relatively large because they are straight, and the Young's modulus is also large. When unwinding from the package, loops etc. tend to get caught, and as a result fluctuations in the unwinding tension become large, which can lead to thread unevenness, thread breakage, etc. due to tension fluctuations during knitting, turning, etc. Ta. In this case, if a crimped yarn is used as the yarn, the rings and loops will become smaller in appearance due to the crimping, and if a crimped yarn with torque such as a false twisted yarn is used, the torque of the filament will be reduced. As a result, the loops, rings, etc. are aligned along the yarn axis, and the Young's modulus of the filament is lower than that of the drawn yarn, making it soft, and the loops and rings are apparently smaller, making it easier to unwind. A bulky textured yarn with significantly less gloss can be obtained, and a fabric with a subdued color tone can be obtained. However, the cost increases due to the crimping process, and when multiple yarns are fed at different feeding speeds to a previously known fluid nozzle with a single yarn inlet passage, there are problems with the feeding speed. The yarn with a high feeding speed gets entangled with the small yarn,
Problems such as wrapping around the supply roller and intermittent formation of neps-like spots occurred. Therefore, it is necessary to make the difference in feeding speed considerably small. Especially when using crimped yarn, it is almost impossible to make a difference in feeding speed due to the crimping. It has been difficult to produce bulky textured yarn that satisfies the stability against tension. The inventor of the present invention has arrived at the present invention as a result of intensive research aimed at solving the drawbacks of conventional methods for producing bulky textured yarn. The present invention has the following configuration to achieve this object. That is, the present invention provides a method for producing a bulky textured yarn by supplying a plurality of yarns at different speeds to a fluid agitation chamber following a yarn inlet passage and subjecting them to fluid agitation treatment. A crimped yarn is used as the large yarn, and at least the yarn with the highest feeding speed and the yarn with the lowest feeding speed are arranged in parallel in a plurality of parallel yarns with approximately the same length in the yarn entrance passage. A bulky textured yarn characterized in that the yarn is guided without contacting at least the entire length of the yarn entrance passage before being guided into the yarn guide tube and supplied to the fluid stirring chamber, and then fed to the fluid stirring chamber. This is a manufacturing method. The present invention will be explained below with reference to the drawings. Of course, the drawings are for illustrative purposes only, and changes may be made without losing the spirit of the invention. FIG. 1 is a schematic side view showing an example of an apparatus for implementing the present invention, and FIG. 2 is a longitudinal sectional view showing an example of a fluid nozzle used in FIG. 1. First, in the present invention, the reason why crimped yarn Y ₁ ' is used as the yarn with the highest feeding speed is because of the texture,
This is to ensure that there is almost no difference in appearance from a yarn made of 100% crimped yarn, and to improve unwinding properties. This is because the crimped yarn Y ₁ ' is obtained due to the high hanging and feeding speed, which controls the feel and appearance of the bulky textured yarn Y ₃ , and also the rings, slacks, and loops protruding from the bulky textured yarn Y ₃ . This is because most of the yarn is made of crimped yarn Y ₁ ′, and therefore the apparent loops are small and can easily follow the yarn axis. In the figure, the yarn Y ₁ is false-twisted by a twister 5 or the like to become a crimped yarn Y ₁ ', which serves as a leno yarn. In addition, it is better to set the number of false twists slightly lower than the number of twists applied to normal false twisting to improve the quality of crimped yarn.
This is preferable because it improves the spreadability of Y ₁ ′ and, in turn, enhances the entanglement property. In order to fully exhibit the effect of the crimped yarn Y ₁ ′, which has the highest feeding speed, it is preferable that the crimped yarn Y ₁ ′ contains at least 30% or more in terms of denier ratio. . On the other hand, the yarn _Y2 is unwound from the package 12 and supplied to the fluid nozzle by the third roller 13 as a yarn with the lowest feeding speed, and serves as a core yarn. As the crimped yarn Y ₁ ′, false twisted yarn is preferable because it has torque and the loops can easily follow the yarn axis, but crimped yarn Y 1 ' is preferable because it has torque and the loops can easily follow the yarn axis. is also used. As the yarn Y ₂ , a drawn yarn, a spun yarn, or the like that is sufficient to provide strength is used, but the entanglement with the crimped yarn Y ₁ ' must also be taken into consideration. Furthermore, yarn
There are no particular limitations on the materials for Y ₁ ′ and Y ₂ ; polyester, polyamide, acrylic, promics,
Acetate, rayon, vinylon, etc. can be used alone or in combination. Fluid nozzle 7
An example is shown in FIG. 2, where the fluid nozzle 7 includes a plurality of thread guide tubes 15, 15', a fluid agitation chamber 22, a fluid injection hole 23, and an outlet passage 19. Here, the yarn guide tubes 15, 15' are connected to the yarn entrance passage 1.
8 is equipped with a crimped yarn with a high feeding speed.
Y ₁ ′ and yarn Y ₂ with a small feeding speed are placed in the fluid disturbance chamber 2.
at least the fluid disturbance chamber 2 before supplying the fluid to the fluid disturbance chamber 2;
This is to allow the threads to be guided over the entire length of the thread entrance passage 18 leading to the threads 2 and 2 without contacting each other. In this way, it has become possible to simultaneously guide a plurality of threads, including the crimped yarn having the highest feeding speed, to the fluid disturbance chamber 22 at different feeding speeds, and to perform fluid disturbance processing. Most preferably, the threads in the thread entry passageway 18 leading to the fluid disturbance chamber 22 do not contact each other at all. However, in general, although the contact length varies depending on the supply speed, the difference in the supply speed, the composition of the yarn, etc., the separation should be at least 1/3 of the yarn inlet passage 18 leading to the fluid disturbance chamber 22. It is sufficient. The yarn separating means in the yarn entrance passage 18 is preferably provided with a plurality of yarn guide tubes in the yarn entrance passage as shown in the figure, but is not necessarily limited thereto, and may include a separate plate, a separate pin, and the like. In this way, the yarns are guided without contacting each other over the entire length of the yarn entrance passage 18 leading to the fluid disturbance chamber 22, so even if there is a large difference in feeding speed between each yarn, each yarn is It is guided smoothly into the fluid agitation chamber, and there is almost no occurrence of thread unevenness, neps, or winding around the rollers. 16 is the aperture part;
17 is a needle portion, 19 is an exit passage, 20 is a thread exit hole, and 21 is a main body. In addition, when performing fluid agitation processing by simultaneously supplying a plurality of yarns, which are larger than the number of yarn guide tubes, to the fluid nozzle 7 at different feeding speeds, the difference in feeding speed is small and the yarns to be used as core yarns are They may be supplied from the same thread guide tube. crimped yarn
Y ₁ ' is supplied by the second roller 6 to the yarn guide tube 15 on the side opposite to the fluid injection hole 23 of the fluid nozzle 7 at a higher supply speed than the yarn Y ₂ . crimped yarn
Such a supply method is preferable because it improves the opening and entangling properties of Y ₁ '. The difference in feeding speed depends on the material, denier, yarn composition, etc. in order to give a favorable texture, post-processability, etc., but at least
It should be at least 10%, preferably at least 15%. In addition, when three or more yarns are used, the feeding rate may be appropriately determined within the above range depending on the texture, post-processability, etc. The plurality of threads guided to the fluid disturbance chamber 22 are introduced through the fluid injection hole 23 and drift through the narrow gap formed between the tip of the needle portion 17 and the main body 21 to enter the fluid disturbance chamber 2.
2, the single fibers constituting the yarn are opened and agitated by the action of the high-speed fluid, and are passed through the exit passage 19 to the outside together with the high-speed fluid. It is squirted. The bulky processed yarn Y ₃ ejected together with this high-speed fluid is pulled out in a direction substantially perpendicular to the direction of the ejected high-speed fluid, and at this time, the loops protruding from the surface are firmly fixed to the main body of the bulky processed yarn Y ₃ . In this case, the reason why the loops are pulled out in a substantially perpendicular direction is to improve the entanglement of the loops. Next, the high-speed fluid supplied to the fluid nozzle 7 is a high-pressure gas (high-pressure air is preferably used, but a gas that is inert and harmless to the yarn may also be used), and a lubricator 14 or the like is used to add liquid to the fluid. (Water is preferably used, but harmless oils, etc. can also be used.) is sprayed to form a gaseous INM ³ (1
Although it is preferable to mix 10 c.c. or more per normal cubic meter (normal cubic meter), the liquid is applied to each yarn using a roller or the like, and the high-pressure gas is applied to the fluid injection hole 23.
It may be introduced from Next, the operation of the present invention will be explained. In FIG. 1, the yarn Y ₁ unwound from the package 1 is led to the false twisting area via the guide 2 and the first roller 3, and is twisted by the twister 5 before being twisted by the heater 4. After being heat-set and untwisted by the twister 5, the crimped yarn _Y1 ' is transferred to the fluid nozzle 7 between the second roller 6 and the third roller 9 in an overfeed state suitable for fluid disturbance treatment. Supplied. On the other hand, the yarn Y ₂ is unwound from the package 12 and passes through the guide 2' to the fourth
The fluid is supplied to the nozzle by the roller 13 at a slower speed than the second roller 6. crimped yarn
Y ₁ ' and yarn Y ₂ are connected to the yarn guide tube 1 as shown in Fig. 2.
5 and 15', the fluid is supplied to the fluid agitation chamber 22 without contacting each other, and subjected to fluid agitation processing.
At this time, the liquid is mixed into the high-pressure gas in a spray state by the lubricator 14. Then crimped yarn
After Y ₁ ′ and yarn Y ₂ are simultaneously subjected to fluid agitation treatment, they pass through a guide 8 and are taken up by a third roller 9 and delivered as bulky processed yarn Y ₃ to a package 11 that rotates in contact with a winding drum 10. It is rolled up. As described above, the present invention has the remarkable effect of easily and inexpensively producing a bulky textured yarn that is soft, has excellent bulkiness, has excellent post-processability, and is stable against tension in the yarn axis direction. It is played. Example A bulky textured yarn was produced using the apparatus shown in FIG. 1 under the following conditions. Conditions: Yarn Y ₁ ...Polyester fiber POY (110 denier/36 filaments) Yarn Y ₂ ...Polyester fiber drawn yarn (75 denier/36 filaments) Surface speed of first roller 3...410 m/min Second roller 6 Surface speed...600m/min Surface speed of third roller 9...450m/min Surface speed of fourth roller 13...500m/min Heater...200℃ x 1.5m Twister...3-axis disk type twister (one for each disk axis) Disc circumferential speed when installed: 1250 m/min) High-speed fluid: Fluid made by mixing high-pressure air INM ³ with 25 c.c. of water in atomized form (pressure: 9.5 Kg/cm ² G) The bulky textured yarn thus obtained is A bulky textured yarn was obtained which was soft and highly bulky, had high stability against tension in the yarn axis direction, and had no problems in post-processing. Using this bulky textured yarn, a double pique structure was knitted using a 24-gauge rib knitting machine. For comparison, a yarn produced using a drawn yarn instead of the crimped yarn according to the present invention was knitted, and the physical properties of the resulting knitted fabric were compared with the physical properties of the knitted fabric according to the present invention. As is clear from Table 1, the knitted fabric according to the present invention had a large specific volume, low air permeability, bulk, excellent heat retention, and was rich in warmth in terms of feel and appearance. 【table】

[Brief explanation of the drawing]

The figures relate to the present invention; FIG. 1 is a schematic side view showing an example of an apparatus for carrying out the present invention;
The figure is a longitudinal sectional view showing an example of a fluid nozzle. Y ₁ ... Yarn, Y ₂ ... Yarn, 7... Fluid nozzle, 1
5, 15'... Yarn guide tube, 18... Yarn entrance passage.

Claims (1)

[Claims] 1. In a method of producing bulky textured yarn by supplying a plurality of yarns at different speeds through a yarn inlet passage to a fluid agitation chamber and subjecting them to fluid agitation treatment, the yarn with the highest feeding speed is A crimped yarn is used, and at least a yarn with the highest feeding speed and a yarn with the lowest feeding speed are respectively introduced into a plurality of parallel yarn guide tubes having approximately the same length in the yarn entrance passage. A method for producing a bulky textured yarn, characterized in that before being guided and supplied to the fluid disturbance chamber, the yarn is guided without contacting at least the entire length of the yarn entrance passage, and then supplied to the fluid disturbance chamber.