JP2006111983A - Multifilament yarn, apparatus for interlacing multifilament yarn and method for interlacing multifilament yarn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an interlacing apparatus which can suitably interlace a raw yarn in a multifilament state at a high speed and is used for producing a synthetic multifilament yarn, and to provide a method for interlacing the yarn. <P>SOLUTION: This multifilament yarn comprising synthetic filaments having a single filament fineness of ≤2 dtex. The apparatus 1 for interlacing the multifilament yarn comprising a yarn-treating portion 5 for interlacing a yarn, a fluid-jetting portion 6 comprising two fluid-jetting holes opened in the yarn-treating portion 5 and crossing each other, and a slit portion for allowing the yarn-treating portion 5 to communicate with the outside is characterized in that an angle θ(°) between the axis of the yarn-treating portion 5 and the axes of the two fluid-jetting holes, a crossing angle α(°) between the two fluid-jetting holes, and the length L (mm) of the yarn-treating portion 5 in the axial direction satisfy the following expressions (a) to (c). (a): 70°≤θ≤88°, (b): 60°≤α≤100°, (c): 3 mm≤L≤15 mm. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a multifilament yarn, a multifilament yarn entanglement imparting device, and a entanglement imparting method.

  Conventionally, in a manufacturing process of a synthetic fiber multifilament yarn that is melt-spun, in order to give the multifilament yarn a converging property, a relatively small number of entanglements and weak entanglement, so-called entanglement called raw yarn entanglement Application processing is performed.

  The provision of the entanglement is originally performed in order to improve the handleability by giving the synthetic fiber multifilament yarn melt-spun without being bundled.

  The provision of such entanglement is a concrete proposal that has been studied in a uniform, uniform and efficient manner in recent years as the melt spinning speed of synthetic fibers has increased significantly and the number of filaments has increased (the number of filaments has increased). (Patent Document 1).

  The proposal made in Patent Document 1 relates to the optimization of the position of the yarn path defining guide provided upstream and downstream of the fluid jet entanglement device, but the premise of the target level is high speed (patent As shown in paragraph 0026) of the document 1, examples, etc., in particular, the number of filaments is 50 or less and the single fiber thickness (single filament thickness) is 4 denier or more. It can not be said that it was able to sufficiently cope with the increase in the number of filaments (increase in the number of filaments). Below (generally about 0.1 to 2.0 dtex, more practically about 0.6 to 1.5 dtex), and sufficient for processing at a high speed. Was Tsu.

  In particular, the present invention is a multi-striping with a fineness (for example, 100 or more filaments and a single fiber thickness of 2 dtex or less (generally about 0.1 to 2.0 dtex)) and a high speed It is about the original yarn entanglement of the synthetic fiber multifilament yarn which is required to be processed in the above.

  On the other hand, various fluid entanglement processing apparatuses have been proposed (Patent Documents 2 and 3).

However, these are not intended to be entangled with the original yarn, but are intended to form entangled multifilament yarns as processed yarns, for example, loops, etc., and to make the occurrence of the loops uniform. As is clear from the description of each example, the number of entanglements is about 80 / m per 1 m of the yarn, and further is a level of 100 / m or more, and the yarn speed is about 300 to 600 m / min. It was not a treatment as a melt spinning process of synthetic fibers, and it was not related to the entanglement treatment of the raw yarn before processing.
JP 2002-69780 A JP-A-8-92839 Japanese Patent Laid-Open No. 2001-248031

  In view of the above-described points, the object of the present invention is to increase the number of filaments (for example, the number of filaments is 100 or more and the single fiber thickness is 2 dtex or less (generally 0.1 to 0.1). A synthetic fiber multifilament yarn having a suitable yarn entanglement in a synthetic fiber multifilament yarn that is required to be processed at a high speed of about 2.0 dtex), and An object of the present invention is to provide a entanglement imparting device and a entanglement imparting method for a multifilament yarn preferably used for producing the synthetic fiber multifilament yarn.

The synthetic fiber multifilament yarn of the present invention that achieves the above-mentioned object has the following configuration (1).
(1) It is a multifilament yarn composed of synthetic fiber filaments having a single fiber fineness of 2 dtex or less, and the number of entanglements is 2 / m or more and 20 / m or less and the number of fluffs is 7/50000 m or less. Characteristic multifilament yarn.

The multifilament yarn of the present invention preferably has the following configuration (2).
(2) The multifilament yarn described in (1) above, which is a partially oriented undrawn multifilament yarn.

In addition, the multifilament yarn entanglement imparting device of the present invention that achieves the above-mentioned object has the following configuration (3).
(3) From a yarn processing unit that provides entanglement to the yarn, a fluid injection unit that includes two fluid injection holes that open to the yarn processing unit and intersect each other, and a slit unit that communicates the yarn processing unit with the outside In the entanglement imparting device, the angle θ (°) formed by the axis of the yarn processing unit and the axis of the two fluid injection holes, the crossing angle α (°) at which the injection holes intersect, and the axis of the yarn processing unit A multifilament yarn entanglement imparting device, wherein a length L (mm) in a direction satisfies the following formulas (a) to (c):
70 ° ≦ θ ≦ 88 ° (a)
60 ° ≦ α ≦ 100 ° (b)
3 mm ≦ L ≦ 15 mm (c)

More specifically, the multifilament yarn entanglement imparting device of the present invention preferably has the following configurations (4) to (5).
(4) a fluid supply unit provided with a pressurized fluid introduction path therein and at least three yarn path members arranged in a row at intervals along the pressurized fluid introduction path of the fluid supply unit Each of the at least three yarn path members is isolated so that a thread processing portion and a slit communicating the yarn processing portion and the outside are interposed between the adjacent other yarn path members, The multifilament yarn entanglement imparting device according to the above (3), wherein the yarn path member is formed with two fluid injection holes that open toward the yarn processing section and intersect each other.
(5) The multifilament yarn according to (3) or (4) above, wherein a V-shaped concave portion formed in the axial direction of the yarn processing portion is provided between the two fluid ejection holes. Confounding device.

In addition, the multifilament yarn entanglement imparting method of the present invention has the following configuration (6).
(6) A multifilament yarn entanglement imparting method, wherein the multifilament yarn is entangled using the multifilament yarn entanglement imparting device according to any one of (3) to (5) above.

  According to the first aspect of the present invention, the number of filaments is increased with fineness (for example, the number of filaments is 100 or more and the single fiber thickness is 2 dtex or less (generally about 0.1 to 2.0 dtex)). In the synthetic fiber multifilament yarn that is required to be processed at a high speed, a novel synthetic fiber multifilament yarn having a suitable raw yarn entanglement is provided.

  Further, according to the present invention according to claims 3 and 6, there is provided an excellent multifilament yarn entanglement imparting device and an entanglement imparting method capable of producing the above-described excellent synthetic fiber multifilament yarn. .

  Hereinafter, the present invention will be described in more detail.

  The multifilament yarn according to the present invention is composed of synthetic fiber filaments such as polyester fiber and polyamide fiber, the single fiber (single filament) fineness is 2 dtex or less, and the number of entanglements is 2 / m or more and 20 / m or less, A multifilament yarn having a fluff number of 7 / 50,000 m or less.

  In recent years, such synthetic fiber multifilament yarns are usually produced by high-speed spinning such as a take-up speed of 3000 m / min or more, and are produced as so-called POY yarns (partially oriented undrawn yarns). It is important that the single fiber fineness is 2 dtex or less, and when it is larger than 2 dtex, the rigidity of the single fiber, the whole yarn, or the fabric becomes strong, and the intended purpose of the present invention is It becomes difficult to obtain a fabric having a texture that creates a soft feeling and a soft bulging feeling. The fineness of the single fiber is preferably adjusted to about 0.1 dtex, and more preferably in the range of about 0.25 to 1.5 dtex in practice. Further, it is most preferable to use a polyester-based synthetic fiber typified by polyethylene terephthalate fiber in terms of making the most of the texture.

  In the synthetic fiber multifilament yarn of the present invention, it is important that the number of entanglements is 2 / m or more and 20 / m or less, the number of fluffs is 7/50000 m or less, and the number of entanglements is 2 / m. If it is less than 1, there is no convergence and this is not preferable. Further, when there are more entangled portions than 20 pieces / m, based on the presence of the entangled portions, subtle unevenness of stretching may occur in the subsequent stretching step, and the uneven stretching may be uneven dyeing. This is undesirable because it may affect the final product. When the number of fluff is larger than the above range, the yarn passing property in the subsequent high-order processing step is lowered, which is not preferable. According to the knowledge of the present inventors, the number of fluffs present is preferably 3/50000 m or less, and the lower limit is 0/50000 m.

A multifilament yarn entanglement applying device according to the present invention includes a yarn processing unit that provides entanglement to a yarn, a fluid injection unit that includes two fluid injection holes that open to the yarn processing unit and intersect each other, and a yarn processing unit. In an entanglement imparting device comprising a slit portion communicating with the outside, an angle θ (°) formed by the axis of the yarn processing portion and the axis of the two fluid injection holes, a crossing angle α (°) at which the injection holes intersect, and a yarn The length L (mm) of the processing part in the axial direction is a multifilament yarn entanglement imparting device that satisfies the following expressions (a) to (c).
70 ° ≦ θ ≦ 88 ° (a)
60 ° ≦ α ≦ 100 ° (b)
3 mm ≦ L ≦ 15 mm (c)

  When θ is smaller than 70 °, the air flow has a direction in which the air flow has a strong effect, resulting in a lot of fluff and tarmi. When the angle is larger than 88 °, the air flow injected from the fluid injection hole is reduced. Since it flows in a direction opposite to the yarn traveling direction, fluff and tarmi increase, and in particular, from the point of entanglement with the raw yarn as in the present invention, homogeneity is strongly required, which is not preferable. Is.

  Further, when α is smaller than 60 °, each fiber behavior necessary for entanglement of the yarn becomes low and unfavorable because it becomes difficult to impart entanglement, and when it exceeds 100 °, the behavior of the yarn becomes too large and entanglement is imparted. However, it is advantageous in that the fluff and the tarmi tend to increase. In particular, in terms of entanglement with the raw yarn as in the present invention, homogeneity is strongly required, which is not preferable.

  Moreover, when L is smaller than 3 mm, stable confounding imparting processing becomes difficult, and when L is larger than 15 mm, the time of contact between the jet air flow and the yarn to be treated becomes longer, and in the direction that fluff and tarmi increase again. In view of entanglement with the raw yarn, homogeneity is strongly required, which is not preferable.

  FIG. 1 is a schematic perspective view schematically showing the structure of a multifilament yarn entanglement imparting device according to the present invention. The entanglement imparting device 1 includes a fluid supply unit 2, a fluid ejection nozzle unit 3, and a side plate 4. The arrow Y indicates the direction of passage of the multifilament yarn.

  FIG. 2 shows a schematic cross-sectional model diagram in which the cross section in the direction perpendicular to the passing direction Y of the multifilament yarn in the fluid entanglement imparting device 1 shown in FIG. 1 is taken.

  2, the confounding imparting device 1 includes two fluid supply units, three fluid ejection nozzles, and four side plates, 6 is a fluid ejection unit, and the two fluid ejection holes exhibit an intersection angle α. Crossed.

  In the figure, reference numeral 5 denotes a yarn processing section, which is a space through which the yarn passes, and the running yarn is caused to vibrate in this portion to be air entangled.

  7 is a slit part, and 8 is a fluid introduction passage. The slit portion 7 is used as a yarn introduction portion when the continuous multifilament yarn traveling through the entanglement imparting device 1 is threaded, and is also a passage for discharging air injected for imparting entanglement.

  The fluid introduction passage 8 is a passage for supplying compressed air used for the confounding process, and the pressure air is guided to a space provided in the fluid ejection nozzle portion 3 and further an air flow is ejected from the two fluid ejection holes. The

  FIG. 3 is a schematic plan model diagram of the confounding imparting apparatus 1 shown in FIGS. 1 and 2, in which the length L (mm) in the axial direction of the yarn processing unit, the axis of the yarn processing unit, and two fluid ejections FIG. 3A is a diagram for explaining an angle θ (°) formed by the axis of the hole, and FIG. 3A is a model diagram of what is generally included in the angle range of θ specified in the present invention. These are the schematic model figures of what is (theta) 90 degrees and is not included in this invention.

  As shown in FIGS. 4 (a) and 4 (b), the fluid entanglement imparting device of the present invention performs processing by concentrating a plurality of multifilament yarns simultaneously and physically on one processing device. When used as a fluid entanglement nozzle for multiple yarns assembled as an integral fluid treatment device as possible, a higher practical effect is exhibited.

  4A is a schematic perspective view of the multi-thread fluid entanglement nozzle, and FIG. 4B is a cross-sectional view in the direction perpendicular to the passing direction Y of the multifilament yarn in the fluid entanglement imparting apparatus 1 as in FIG. It is a schematic cross-sectional model figure which took the cross section.

  The basic structure of the fluid entanglement processing apparatus having such a structure is known from Japanese Patent Application Laid-Open Nos. 9-250043 and 2002-309460.

  That is, the fluid ejection nozzle portion 3 having a fluid ejection hole for one yarn, on the other hand, forms a wall that forms part of the yarn processing portion 5 of the adjacent yarn on the back wall portion, and such a combined structure Thus, the fluid entanglement nozzle has a basic structure in which a plurality of yarns are formed to form a single unit body. In FIG. 4, 13 is a bolt for integration.

  In the present invention, when the fluid processing apparatus as shown in FIG. 4 is used, it is preferable that the number of multifilament yarns to be simultaneously processed is three or more.

  That is, in the present invention, preferably, as described in claim 3, a fluid supply section provided with a pressurized fluid introduction path is provided inside, and a space is provided along the pressurized fluid introduction path of the fluid supply section. At least three yarn path members arranged in a row, and the at least three yarn path members include a yarn processing unit, the yarn processing unit, and the outside between the other adjacent yarn path members. This is an entanglement imparting device that is isolated so as to interpose a communicating slit, and each of the yarn path members is perforated with two intersecting fluid ejection holes that open toward the yarn processing section.

  In the confounding imparting device of the present invention, a V-shaped concave portion (V-shaped convex portion when viewed as a yarn processing portion) is formed in the middle of the two fluid ejection holes in the axial direction of the yarn processing portion. It is preferable. By having the V-shaped portion, the vibration behavior of the running filament yarn becomes steady and stable, which is preferable for uniform and uniform yarn quality and yarn quality.

[Example of multifilament yarn]

In the following examples, the measurement and determination of the number of entanglements, the measurement and determination of the number of fluffs, and the determination of yarn stretch spots (evaluation of dyed spots and evaluation of stretch spots) were based on the following methods: It is.
(1) Measurement and evaluation of the number of confounding:
About each polyester partially oriented undrawn yarn obtained in each Example / Comparative Example of the present invention, a pre-tension is set to 10 CN and a trip tension is set to 17 CN using an automatic continuous entanglement tester R-2072 manufactured by Rosshield. Then, the sample yarn was run with the set number of entangled portions set to 20, and the yarn length (running yarn length) required until 20 entangled portions were counted was measured, and the yarn length per 20 entangled portions First, the value was calculated.

  Further, the value of the yarn length per 20 entangled portions was converted into the number of entanglements per 1 m of yarn length, and the converted value was determined as “number of entanglements per 1 m of yarn length”. In the measurement, the average value was obtained by setting the n number to 20 times.

In the determination of the number of entanglements, the number of entanglements per 1 m length of the yarn is expressed as “bad” in Table 1 as “bad” when less than 2 and “good” when 2 or more and less than 5 as “good”. Indicated by “△”, 5 or more were “excellent”, and in Table 1, “◯” was indicated, “good” and “excellent” were passed, and “bad” was rejected.
(2) Measurement and determination of the number of fluff:
About each polyester partial orientation undrawn yarn obtained in each example and comparative example of the present invention, the detection height is set to 2 mm by an S-type detector using a fluff counting device DT-105 manufactured by Toray Engineering Co., Ltd. Then, the unwinding speed of the package was set to 500 m / min, the yarn length of 50000 m was measured, and the number of fluffs present per 50000 m length was obtained as it was. In the measurement, the number of n was 20 times and the average was obtained.

The number of fluff is judged as “bad” when the number of fluffs per length of 50000 m of yarn exceeds 7 is indicated as “bad” in Table 1, and 5.5 or more and 7 or less is judged as “good”. In Table 1, “△” is indicated, “less than 5.5” is indicated as “excellent”, in Table 1, “◯” is indicated, “good” and “excellent” are passed, and “bad” is rejected. did.
(3) Evaluation of stretching unevenness based on the presence of entanglement:
In order to confirm the influence of stretching unevenness due to the presence of entanglement in each polyester partially oriented undrawn yarn obtained in each Example / Comparative Example of the present invention, the fluctuation of heat shrinkage stress as an index of dyeing unevenness I checked the condition.

  Specifically, using a heat shrinkage stress measuring device FTA-500 manufactured by Toray Engineering Co., Ltd., the yarn was run with a relaxation rate of 98%, a yarn speed of 20 m / min, and a running tension of 2 g. The sample was heated with a heater set at 0 ° C., and the variation in tension was measured for 10 minutes.

  In this measurement, the fluctuation value of the running tension obtained from the difference in heat treatment between the entangled part and the spread part at the same heat amount was defined as the fluctuation tension, and the following determination was performed based on the fluctuation tension value.

Judgment is shown in Table 1 as “Excellent” when the fluctuation tension obtained by the measurement is less than 0.3, as “Excellent” in Table 1, and as “Good” when 0.3 g or more and less than 0.5 g in Table 1. Indicated by “Δ” and 0.5 g or more as “defective”, in Table 1, “x”.
(4) Process passability using false twisting machine:
Stoppage rate due to package unwrapping failure due to entanglement failure when drawing false twisting at 900 m / min using a drawing false twisting device made by Toray Engineering Co., Ltd. consisting of 216 spindles And the process passability of the polyester partially oriented undrawn yarn obtained in each of the examples and comparative examples of the present invention was evaluated.

  The method for obtaining the stop rate was expressed as a percentage obtained by dividing the number of times of processing × 216 spindles by the number of times of processing × the number of stops.

In the evaluation, a stoppage rate of less than 8% is indicated as “Excellent” in Table 1 as “◯”, and 8% or more and less than 10% is indicated as “Good” in Table 1 as “△”. % Or more are indicated as “bad” in Table 1 by “x”.
(5) Comprehensive evaluation as raw yarn:
In the evaluation of each item of the above (1) to (4), if there is at least one “×”, it is indicated as “bad” in Table 1 as “bad”, and there are two each of ○ and Δ. “Normal” is indicated by “△ to ○” in Table 1, “○” is indicated by “○” as “good” when three and one are △, and is indicated as “excellent” when all are “○”. In 1, it was written as “◎”.
Examples 1-3, Comparative Examples 1-10
Polyethylene terephthalate multifilament yarn having 130 dtex and 144 filaments was manufactured by the apparatus and process shown in FIG.

  The winding speed is 3000 m / min, the speed of the first godet roll is 3000 m / min, and the speed of the second godet roll is 3000 m / min.

  The fluid entanglement imparting device shown in FIG. 4 is installed upstream of the first godet roll, the pressure is changed within a range of 0.05 to 0.4 MPa, and as shown in Table 1, various entanglement numbers, The number of fluff was obtained. The spinning tension at this time was 50 g.

［交絡付与装置の実施例］

[Example of confounding device]

Examples 1-3, Comparative Examples 1-10
Using the fluid entanglement imparting device of various dimensions shown in Table 2, the polyethylene terephthalate multifilament yarn is melt-spun in the process outline shown in FIG. 5 and subjected to fluid entanglement treatment, and wound at a winding speed of 3000 m / min. The fluid entangled multifilament yarn was manufactured.

  In addition to the conditions shown in Table 2, the fluid entanglement imparting device used one having an injection hole diameter of 1.0 mm, and the fluid (compressed air) injection pressure was set to 0.2 MPa to perform the entanglement process.

  Table 2 shows the yarn quality of each polyester partially oriented undrawn yarn obtained in each Example / Comparative Example.

FIG. 1 is a schematic perspective view schematically showing a structure of a multifilament yarn entanglement applying device according to the present invention. FIG. 2 is a schematic cross-sectional model diagram in which a cross section in a direction perpendicular to the passing direction Y of the multifilament yarn in the fluid entanglement imparting device 1 shown in FIG. 1 is taken. FIG. 3 is a schematic plan model diagram of the confounding imparting apparatus 1 shown in FIGS. 1 and 2, in which the length L (mm) in the axial direction of the yarn processing unit, the axis of the yarn processing unit, and two fluid ejections FIG. 3A is a diagram for explaining an angle θ (°) formed by an axis of a hole, and FIG. 3A shows that an angle formed by an axis of a yarn processing section and an axis of two fluid ejection holes is approximately the present invention. FIG. 2B is a schematic diagram of a component that falls within the angle range of θ specified in FIG. 1, and FIG. 4B is a schematic model diagram of one that is 90 ° and is not included in the present invention. 4 (a) and 4 (b) show an example of the structure of the entanglement imparting device according to the present invention assembled as an integral fluid treatment device capable of simultaneously processing multiple yarns. FIG. 3A is a schematic perspective view, and FIG. 3B is a schematic cross-sectional model diagram in which a cross section in a direction perpendicular to a passing direction Y of a multifilament yarn in the fluid entanglement imparting device 1 is taken as in FIG. 2. FIG. 5 schematically shows an example of a process for producing a fluid entangled multifilament yarn by melt spinning the polyethylene terephthalate multifilament yarn employed in the example and subjecting it to a fluid entanglement treatment.

Explanation of symbols

1: Entangling device 2: Fluid supply unit 3: Fluid ejection nozzle unit 4: Side plate unit 5: Yarn processing unit 6: Fluid ejection unit 7: Slit unit 8: Fluid introduction passage 9: First godet roll 10: Second godet roll 11 : Winding machine 12: oil supply guide 13: bolt Y: multifilament yarn L: length in the axial direction of the yarn processing section θ: angle formed by the axis of the yarn processing section and the axes of the two fluid injection holes α: two Intersection angle where fluid injection holes intersect

Claims (6)

  A multifilament yarn composed of synthetic fiber filaments having a single fiber fineness of 2 dtex or less, wherein the number of entanglements is 2 / m or more and 20 / m or less, and the number of fluffs is 7/50000 m or less. Multifilament yarn.   The multifilament yarn according to claim 1, which is a partially oriented undrawn multifilament yarn. Conformation provision comprising a yarn processing section for confounding a yarn, a fluid ejecting section comprising two fluid ejecting holes that open and intersect each other, and a slit section that communicates the yarn processing section with the outside In the apparatus, the angle θ (°) formed by the axis of the yarn processing section and the axis of the two fluid injection holes, the crossing angle α (°) at which the injection holes intersect, and the length of the yarn processing section in the axial direction A multifilament yarn entanglement imparting device, wherein the length L (mm) satisfies the following expressions (a) to (c):
70 ° ≦ θ ≦ 88 ° (a)
60 ° ≦ α ≦ 100 ° (b)
3 mm ≦ L ≦ 15 mm (c)   A fluid supply section provided therein with a pressurized fluid introduction path; and at least three yarn path members arranged in a row at intervals along the pressurized fluid introduction path of the fluid supply section, At least three yarn path members are isolated so that a yarn processing portion and a slit that communicates the yarn processing portion and the outside are interposed between other adjacent yarn path members, and the respective yarn path members The multifilament yarn entanglement imparting device according to claim 3, wherein two fluid injection holes that open toward the yarn processing section and intersect each other are drilled.   5. The multifilament yarn entanglement imparting device according to claim 3, further comprising a V-shaped concave portion formed in the axial direction of the yarn processing portion in the middle of the two fluid ejection holes.   A entanglement imparting method for multifilament yarns, wherein entanglement is imparted to multifilament yarns using the multifilament yarn entanglement imparting device according to any one of claims 3 to 5.

Images