JPH0491242A - Fancy yarn and production thereof - Google Patents

Abstract

PURPOSE:To obtain the subject yarn containing bulky parts and nonbulky parts alternately distributed with random lengths and having excellent collectability by intermittently and irregularly controlling the gyration false-twisting and turbulent flow treatment while overfeeding a multifilament of single yarn. CONSTITUTION:A multifilament yarn 1 such as polyamide yarn is supplied from a feeding roller 2 at an overfeeding rate, passed through a gyration false- twisting nozzle 3, a water-applicator 4 and a turbulent flow nozzle 5 to intermittently and irregularly apply a gyration false-twisting and a turbulent flow treatment to the yarn, passed through a take-up roller 8 and wound on a cheese 9 to obtain the objective yarn.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fancy yarn in which bulky portions and non-bulky portions are randomly present in the longitudinal direction of the yarn, and a method for manufacturing the same. The present invention relates to a fancy yarn in which the length of each portion is arbitrary and excellent in cohesiveness, and a method for manufacturing the same.

[Prior art] Traditionally, knitted fabric products using multifilament yarns have established a position in clothing because they have excellent functional characteristics such as stretchability, bulkiness, and wrinkle resistance. . However, in recent years, there has been a growing tendency for consumers to avoid knitted fabric products made from conventional multifilament yarns due to their monotonous appearance and texture, and due to the varied surface effects resulting from natural unevenness in thickness and bulkiness. The fresh texture has been strongly desired.

As a known technique similar to the technique of intermittently imparting loops, entanglements, or slacks to arbitrary lengths in the longitudinal direction of the filament yarn, for example, Japanese Patent Laid-Open No. 56-12
No. 3428 and Japanese Unexamined Patent Publication No. 56-123427 have been proposed. Among these, there has been proposed a method for manufacturing fancy yarn using a negative pressure suction method during retention.

In JP-A-56-123428, since a tube with negative pressure suction is used in the yarn path during retention, the device gets in the way, it is difficult to thread the yarn, and the yarn is easily broken, resulting in poor operability. In addition, since the straight portion of the obtained fancy yarn is not subjected to the focusing action, separation of single fibers is likely to occur.
This resulted in high costs and poor quality stability, such as a decrease in passability through post-processes and insufficient maturation, resulting in differences in dyeing.

[Problems to be Solved by the Invention] In view of the above-mentioned points, the purpose of the present invention is 1 to improve these drawbacks and to create a filament yarn without losing the excellent functions and characteristics of conventional filament yarns. A fancy yarn that has a yarn form that has a natural flavor and varies in thickness by adding loops, entanglements, or slacks at arbitrary lengths intermittently in the longitudinal direction of the yarn, and has high cohesiveness, and its production. The purpose is to provide a method.

[Means for Solving the Problems] A fancy yarn and a method for manufacturing the same according to the present invention that achieve the above objects have the following configuration.

That is, it is a fancy yarn in which bulky parts and non-bulky parts exist alternately in the longitudinal direction of the yarn, and the bulky part is a part with many loops, entanglements, and slacks, and is a non-bulky part. The bulky portion is a straight portion and is a portion that is bundled by left and right twists, and is a fancy yarn in which each portion exists in an arbitrary longitudinal direction of the yarn.

In addition, the above fancy yarn manufacturing method is a processing method that imparts bulkiness to loops and sagging by subjecting multifilaments to fluid injection treatment, and the swirling treatment and the fluid injection treatment are performed in the same supply, and either one of them is performed. It is characterized by being applied intermittently.

The present invention will be explained in more detail below.

First, with respect to fancy yarn, the bulky portion is a portion composed of numerous loops, tangles, or slacks that have been subjected to fluid jetting treatment.

The yarn length of the bulky portion is determined by the intermittent action time, processing speed, excess supply rate, fluid injection pressure, etc., and is 2 to 3 cm for the short length portion.

It can be several meters long. Also, if we convert the thickness of the bulky part into the excess supply rate, if the straight part of the single-filament multifilament yarn is 1, then it is 1.0
It is preferably in the range of 1 to 2.00. In other words, when the excess supply amount increases, the bulkiness becomes high and the quality of the appearance deteriorates, and when the excess supply amount decreases, the unevenness becomes less noticeable.

Note that the length and thickness of the bulky portion are regular or irregular, so-called random.

Further, the combination of length and thickness should be appropriately selected depending on the intended use of the final product.

Further, in the present invention, variations in the thickness and length of the yarn between the bulky portion and the non-bulky portion provide a natural and excellent aesthetic effect. In particular, a combination in which the yarn length of the non-bulky portion is longer than that of the bulky portion is preferred, and an average length ratio of 1:10 or more is excellent. If the ratio is less than 1:10, the unevenness will look very flashy and artificial, and if it is more than this, it will look elegantly natural.

Regarding the thickness, it is preferable that the bulky part is 10 to 100% thicker in terms of average denier than the non-bulky part, and 20 to 40% thicker.
% has a natural uneven feel. When it becomes 100% or more, the appearance becomes close to pongee style.

On the other hand, the bulky portion has a natural appearance with a spindle shape.

Next, the non-bulky part is a straight part and is a part converged by left and right twists. The left and right twists of the straight part consist of light alternating twists, and there is virtually no twist. The range of twists varies depending on the thickness of the yarn and processing conditions, but is approximately 5 to 50 twists per meter. The twist caused by this light twist focuses the straight part, which is easy to open.

The bulky portions and non-bulky portions each have an arbitrary length and are alternately present in the yarn longitudinal direction, and the alternating period may be regular or irregular. However, since the former gives a surface effect with an artificial feel, the latter is preferable because it provides a surface with a natural feel.

Next, the single yarn is a multifilament yarn, and may be either a thermoplastic synthetic fiber or a semi-synthetic fiber.

However, among thermoplastic synthetic fibers, polyester yarns and polyamide yarns are preferable, and in particular, denier mix yarns, differential shrinkage mixed fiber yarns, deformed cross-section yarns, and composite multifilament yarns that combine each are used to improve the texture and surface. Excellent in terms of effectiveness.

An external view of the yarn form of the present invention is shown in FIG. A indicates a non-bulky straight part, and the mouth indicates a bulky part.

Next, the manufacturing method will be explained.

In this processing method, a single yarn multifilament is intermittently subjected to fluid injection treatment to give it fancy bulkiness such as loops and slack. The multifilament yarn traveling at the feeding rate is supplied to a processing area provided with a rotating temporary twist nozzle turbulence treatment nozzle in the order in which the yarn travels.

Here, to explain the case where the turbulence treatment nozzle is operated intermittently, it is a multifilament that forms a loop or a bulky part with slack while injecting fluid, and runs at an excessive supply rate while injecting fluid is stopped. The excessive supply amount of yarn is absorbed by the temporary twisting action of the rotating temporary twisting nozzle, and a non-bulky portion is formed.

On the other hand, if we explain the case where the rotating temporary twist nozzle is operated intermittently, when the fluid of the rotating temporary twist nozzle is being injected, the bulkiness of the loop or slack is not formed, but a non-bulky part is formed, and when the fluid is stopped being ejected, the bulky part is formed. In this case, the turbulence treatment nozzle absorbs the excess yarn amount of the multifilament yarn running at an excessive supply rate through the bulk forming action of loops and slack, thereby forming a bulky portion.

Note that the turbulence treatment nozzle and the temporary rotating nozzle may be used alternately.

In general, as the action time of turbulence treatment increases, the length of the yarn in the bulky portions of loops and slacks increases, and as the excess supply rate increases, the bulky portions of loops and slacks become thicker, resulting in uneven yarn bulkiness. Yarn can be manufactured.

In addition, when the action time of the swirling tentative twist becomes longer, no loops or slacks are formed, and the twist becomes an alternating twist, which gives convergence to the straight part of the multifilament yarn.These intermittent actions become irregular. By controlling this, it is possible to produce fancy yarn with natural-looking uneven thickness and length.

This will be specifically explained based on the drawings. First, in FIG. 2, the multifilament yarn 1 is set at a constant excess supply rate between the pair of supply rollers 2 and the take-up roller 8,
The traveling multifilament yarn is supplied to a processing area provided with a rotating temporary twist nozzle 3, a water application device 4, and a turbulence treatment nozzle 5 in the order of travel.

The multifilament yarn 1 is a synthetic fiber such as polyamide or polyester, or a semi-synthetic fiber such as acetate or rayon. Among these, polyamide or polyester multifilament yarns are suitable for forming unevenness, and the larger the number of constituent filaments is, for example, 36 or more for a 75 denier multifilament yarn. In addition, irregular cross-sections such as Y-shape and triangular shapes are preferable to round shapes because they are easier to form uneven thickness, and denier mix,
By combining fibers with differential shrinkage, high quality products can be obtained.

First, in the case of a process in which the turbulence treatment nozzle 5 is applied intermittently, the temporary rotating nozzle 3 is kept in operation at all times, but if strong pressure is applied, the effect of turbulence treatment becomes small, so the turbulence treatment effect is The yarn amount absorption during the stoppage is a necessary minimum weak action, that is, lowering the fluid pressure. for example,
1kg/c for 75 denier multifilament yarn
A pressure below nf is suitable.

In order to operate the turbulence treatment nozzle 5 intermittently, the control device 7 controls the injection and stopping of the fluid by the electric isobune 6. The length ratio of the bulky part and the non-bulky part is determined by the above fluid injection,
This can be easily changed by the control device 7 that performs the stop, that is, by computer control.

Note that the water application device 4 stably forms loops and slack.

After acting intermittently, it is rolled up into cheese 9.

Next, in the case of a process in which the rotating temporary twist nozzle 3 is operated intermittently, the turbulence treatment nozzle 5 is constantly operated.
If a weak action is applied, the effect of the turning temporary twisting process will be reduced, so the fluid pressure should be increased. For example, 7
3kg/cn for 5 denier multifilament yarn
The pressure is greater than f.

Note that since the pressure of the turbulence treatment nozzle 5 is high, it is necessary to increase the effect of the swirling temporary twist, so it is preferable that the pressure applied intermittently be relatively high.

The former process is preferable in terms of energy cost, workability, and bulkiness of loops and slack.

In some applications, interlacing nozzles may be used instead of injection nozzles. Furthermore, before winding up the cheese 9, it is possible to perform a reheat setting, or to perform an intertwining process in which two or more threads are aligned.

[Example] Processing was carried out according to the processing steps shown in FIG. 2 under the following conditions.

Supply yarn polyester filament yarn 75 denier 7
2 filament triangular cross section yarn excess supply rate +5% Rotating temporary twist nozzle constant pressure 0.5kg/ad Turbulent flow processing nozzle pressure 6-Okg/crl Turbulent flow processing nozzle average processing time 30m5ec Turbulence processing nozzle non-average processing time 200 + n5ec take-up roller speed
300 m/min The bulky portion of the yarn obtained under the above conditions had an average length of 25 cm, a thickness of 88 denier,
The average length of the non-bulky part is 275 cm, the thickness is 76 denier, and the number of alternating twists inserted in the non-bulky part is 1 m.
The average number of hits per game was 18. When this yarn was used as the weft of a fabric, a product with a shantung-like appearance with natural unevenness and a spun-like texture was obtained.

[Effect of the invention] According to the fancy yarn of the present invention as described above,
First of all, the non-bulky part is a straight raw silk part, but it has a slight left and right twist or an alternating twist, so even if it is a single thread, it has high bundling properties and is unlikely to open. It has good processability in terms of threadability and weaving and weaving properties.

In addition, since the cohesiveness is high, the surface and structure of the knitted fabric have a good aesthetic appearance.

The variation in the thickness and length of the threads between the bulky and non-bulky portions provides an excellent natural aesthetic effect.

The texture of the fabric is based on raw filament yarn, but the presence of uneven areas gives it a spun-like texture. The thinner the denier of the filament yarn used, the softer the touch, and the use of monofilament filament yarns with different shrinkage rates gives the product a fuller feel.

[Brief explanation of the drawing]

FIG. 1 is an external view showing an example of the fancy yarn according to the present invention, and FIG. 2 is a process diagram of the manufacturing method of the present invention. A: Non-bulky straight part B: Bulky part 1: Multifilament yarn 2 Pair of supply rollers 3: Swivel temporary twist nozzle 4: Water application device 5: Turbulence treatment nozzle 6: Solenoid valve 7: Control device 8: Take-up roller 9: Cheese

Claims (3)

[Claims] (1) A fancy yarn in which bulky parts and non-bulky parts exist alternately in the longitudinal direction of the yarn, and the bulky part is a part with many loops, entanglements, and slacks. A fancy yarn characterized in that the non-bulky part is a straight part and is a part converged by left and right twists, and each part exists at an arbitrary length in the longitudinal direction of the yarn. (2) A processing method that imparts bulkiness to loops and sagging by subjecting multifilaments to fluid injection treatment, characterized by performing either swirling treatment or fluid injection treatment intermittently within the same supply. A method of manufacturing Huangshi yarn. (3) The method for producing fancy yarn according to claim (2), characterized in that the swirling treatment and the fluid injection treatment are performed alternately within the same supply.