JPH0491243A - Fancy yarn and production thereof - Google Patents

Abstract

PURPOSE:To obtain the subject yarn containing bulky parts and non-bulky parts alternately distributed with random lengths by feeding a multifilament yarn at an overfeeding rate to form a core yarn, subjecting to gyration false- twisting and turbulent flow treatment and supplying a sheath yarn in excess of the core yarn. CONSTITUTION:A multifilament yarn 1 such as polyamide yarn is supplied as a core yarn from a feeding roller at an overfeeding rate and passed through a gyration false-twisting nozzle 5, a water-applicator 6 and a turbulent flow nozzle 7 to intermittently and irregularly apply a gyration false-twisting and a turbulent flow treatment to the yarn. Separately, a sheath yarn 3 is supplied from a feed roller 4 in excess of the core yarn, passed through a take-up roller 10 and wound on a cheese 11 to obtain the objective yarn.

Description

Detailed Description of the Invention [Field of Industrial Application] 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 producing the same. The present invention relates to a fancy yarn with excellent bundling properties made of composite yarns having arbitrary lengths and different yarn lengths, and a method for producing 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. Ta. However, in recent years, there has been a growing tendency for consumers to avoid knitted fabric products using conventional multifilament yarns due to their monotonous appearance and texture. Effectiveness and fresh texture have been highly desired.

Techniques for imparting loops, entanglements, slacks, etc. to arbitrary lengths in the longitudinal direction of filament yarns are disclosed, for example, in JP-A-56-123428 and JP-A-56-1.
Japanese Patent No. 23427 proposes, in particular, a method of suctioning negative pressure during retention in the manufacturing method.

In Japanese Patent Application Laid-Open No. 56-123428, since a tube with negative pressure suction is used for the yarn path during retention, the device gets in the way, making it difficult to thread the yarn, and the yarn is likely to break due to negative pressure suction. In addition, since the straight portion of the obtained fancy yarn is not subject to the focusing action, separation of single yarns is likely to occur, especially in the case of composite yarns, and This may lead to a decrease in process passability, lack of convergence, resulting in insufficient blending and dyeing differences, or a rough surface of the product, resulting in high costs and poor quality stability and quality. Ta.

[Problems to be Solved by the Invention] In view of the above-mentioned points, an object of the present invention is to improve these drawbacks, to maintain the excellent functions and characteristics of conventional filament yarns, and to improve the yarn length of the filament yarns. Loops, entanglements, or slacks are added to any length in any direction.
It is an object of the present invention to provide a fancy yarn consisting of a composite yarn having a yarn form with a natural flavor and varying thickness and excellent cohesiveness, and a method for producing the same.

[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 part is a straight part that is bundled by left and right twists, and each part is characterized by being composed of composite yarns with different yarn lengths existing at arbitrary lengths in the longitudinal direction of the yarn. It is a fancy yarn.

In addition, the above-mentioned method for manufacturing fancy yarn involves performing a fluid jetting process using two or more multifilament yarns to create loops and sagging, and then applying a swirling process to the core yarn side. This is characterized in that the sheath yarn portion is subjected to intermittent fluid injection treatment within the same supply.

The present invention will be explained in more detail below.

First, a fancy yarn made of composite yarn will be explained.

The bulky portion is a portion made up of multiple loops, tangles, or slacks that have been subjected to the fluid jetting process. The yarn length of the bulky part is determined by the intermittent action time, processing speed, excess supply rate, fluid injection pressure, etc., but it is 2 to 3 cm for short length parts and several tens of centimeters for long length parts.
The length will be m. Also, if you convert the thickness of the bulky part into a yarn length difference, if the core yarn part is 1, the sheath yarn part is 1.01.
It is preferably in the range of 3.00 to 3.00. In other words, when the yarn length difference is large, the bulkiness becomes too high and the quality of the appearance tends to deteriorate, and when it is small, 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 selected as appropriate 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 50 to 280% thicker in terms of average denier than the non-bulky part, and 100 to 280% thicker than the non-bulky part.
50% has a natural uneven feel. When it is 350% or more, the appearance becomes close to pongee style.

On the other hand, the bulky part has a natural appearance with a spindle shape, and the effect is even greater when it is added.

Next, the non-bulky portion is a straight portion where two or more filament yarns are bundled by left and right twisting. The left and right twists of the straight part consist of light alternating twists and are virtually twist-free. The range of twists varies depending on the thickness of the yarn and processing conditions, but is approximately 5 to 50 twists per meter.

This slight twist causes the straight portion to be bundled in the fiber opening in the subsequent process.

The bulky portions and non-bulky portions each exist alternately in the yarn length direction with arbitrary lengths, and the alternating period may be regular or irregular.

Regarding the length of the non-bulky part, when it is short, the bulky part appears lively, and when it is long, it becomes relatively noticeable as a natural look. Specific length: 10cm~3
A range of 00m is suitable.

Next, the composite yarn of the present invention is composed of a multifilament yarn, and thermoplastic synthetic fibers or semi-synthetic fibers are preferable. Among thermoplastic synthetic fibers, polyester yarns and polyamide yarns are particularly suitable, and among them, denier mixed yarns, differential shrinkage mixed fiber yarns, deformed cross-section yarns, or composite multifilament yarns that combine each of these yarns can be used to improve texture. , the surface effect is excellent.

Furthermore, when the shrinkage rate of the core yarn is greater than that of the sheath yarn, the difference in yarn length increases and the bulk of the bulky portion increases.

The yarn length difference is 1 to 50% in the non-bulky part, preferably 3 to 15%.
It is about %. In the bulky part, the excess supply amount and the shrinkage rate are added, so the range is substantially from 10 to 300%. The yarn length difference also contributes to the bulge of the non-bulky portion, so a product with a soft texture and good feel can be obtained.

In addition, if the sheath yarn is made of single fiber filament yarn with a fine denier, for example, 1.5 to 0.2 denier, or if the cross-sectional shape is triangular, pentagonal, hexagonal, Y-shaped, etc., the texture will be softer. It has excellent drape properties.

Regarding the combination of each denier of the core thread and the sheath thread, generally speaking, the balance of the threads is better when the core thread is thicker than the sheath thread, but the reverse may be possible.

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 a processing method that gives fancy bulkiness to loops and sag by intermittently applying fluid jet treatment to a multifilament made of composite yarn, a pair of supply rollers
This is a process in which yarn is formed by a yarn processing system that performs fluid treatment between a pair of yarns and a take-up roller. First, the multifilament yarn, which becomes the core yarn and runs at a constant excess supply rate,
The threads are fed in the running order to a processing area provided with a rotating temporary twist nozzle and a turbulence treatment nozzle.

On the other hand, the multifilament yarn serving as the sheath yarn is directly supplied to the turbulence treatment nozzle at a higher excess supply rate than the core yarn. In addition, a rotating temporary twist nozzle may be provided similarly to the core yarn.

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 amount of yarn in the supply system is absorbed by the temporary twisting action of the rotating temporary twisting nozzle, and the slack in the excessive supply system is completely eliminated, thereby stabilizing the yarn processability. The composite yarn in this part forms a non-bulky part.

When feeding the sheath yarn, loops and sagging bulky parts are formed while the fluid is being injected, but when the fluid is not being injected, the multifilament yarn running at an excessive supply rate momentarily becomes loose, improving running performance. For this purpose, it is best to pass it through a partition plate or tube.

The length and thickness of the bulky portion can be easily controlled by the fluid injection stop time. In other words, the longer the stop time is, the larger the amount of thread storage becomes, so the length of the bulky part becomes longer.
Thickness becomes thicker. When the stop time is short, the amount of thread accumulated is small, so naturally the thread becomes shorter and thinner.

On the other hand, to explain the case where the rotating temporary twisting nozzle is operated intermittently, the fluid of the rotating temporary twisting nozzle is difficult to form loops or slacks while being injected, forming non-bulky parts,
While fluid injection is stopped, the turbulence processing nozzle forms loops and slacks in the excess amount of multifilament yarn running at an excessive supply rate. Note that the turbulence treatment nozzle and the temporary rotating nozzle may be used alternately.

Next, to explain the conditions of intermittent fluid processing, generally speaking, as the action time of turbulent flow processing becomes longer, the yarn length in the bulky portions of loops and slacks becomes longer, which increases the overfeed rate and increases the overfeed length. In other words, if the distance between the supply roller and the fluid treatment nozzle is long, the bulky parts of the loops and slacks will become thicker, making it possible to produce fancy yarn with uneven yarn bulkiness. As the thread becomes longer, loops and slacks are formed and become alternating twists, which give the straight part of the multifilament yarn cohesiveness.By irregularly controlling these intermittent actions, 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, a multifilament yarn 1 as a core yarn is supplied from a pair of supply rollers 2, a multifilament yarn 3 as a sheath yarn is supplied from a pair of supply rollers 4, and a take-up roller 10 is supplied.
This is a processing step in which a fixed excess supply rate is set between 1 and 2, and a rotating temporary twist nozzle 5, a water application device 6, and a turbulence treatment nozzle 7 are provided in the order in which the yarn of the traveling multifilament 1 travels.

The multifilament yarns 1 and 3 are made of synthetic fibers such as polyamide or polyester, or semi-synthetic fibers such as acetate or rayon. Among these, multifilament yarns made of polyamide or polyester are suitable for forming unevenness, and those with a large number of constituent filaments are suitable. For example, in the case of a 75 denier multifilament yarn, the number of yarns is preferably 36 or more.

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 portions, and high-quality products can be obtained by combining denier mixes, differential shrinkage mixed fibers, and the like.

In particular, it is preferable to use a high shrinkage yarn or a thick denier single fiber filament yarn as the core yarn, and to use a low shrinkage yarn or a fine denier single fiber filament yarn as the sheath yarn.

First, in the case of a process in which the turbulence treatment nozzle 7 is applied intermittently, the rotating temporary twisting nozzle 5 is kept in operation at all times, but if a strong pressure is applied, the effect of turbulence treatment will be small. Thread volume absorption during cessation of action is the minimum necessary weak action, that is, lowering the fluid pressure.For example,
1kg/c for 75 denier multifilament yarn
Pressures below IIr are suitable.

In order to operate the turbulence treatment nozzle 7 intermittently, the computer controller 9 controls the solenoid valve 8 to inject and stop the fluid. The ratio of the bulky portion to the non-bulky portion can be easily changed by the control device 9, that is, computer control, which injects and stops the fluid.

Note that the water application device 6 is necessary for stable formation of loops and slack.

After applying the action intermittently, the cheese is rolled up 11 times.

Next, in the case of a process in which the rotating temporary twist nozzle 5 is operated intermittently, the turbulence treatment nozzle 7 is operated at all times.
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/ca for 5 denier multifilament yarn
The pressure is more than r.

Note that since the pressure of the turbulence treatment nozzle 7 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 rolling up the cheese 11, it can be reheated to improve its texture, or it can be rolled up to improve its thickness into a more spindle shape.

[Example 1] Processing was carried out under the following conditions according to the processing steps shown in FIG.

Supply yarn Core yarn: Polyester filament yarn 50 denier 24 filament triangular cross section yarn Sheath yarn: Polyester filament yarn 60 denier 144 filament round cross section yarn Excess supply rate Core yarn: +5% Sheath yarn: +7% Rotating temporary twist nozzle constant pressure 0. 5kg/Ci turbulence treatment nozzle pressure 6. Qkg/car turbulent flow processing nozzle average processing time 30m5ec turbulence processing nozzle non-average processing time 20 On+sec take-up roller speed
300 m/min The length of the bulky part of the yarn obtained under the above conditions was 15 cm on average, and the thickness was 151 denier, and the length of the non-bulky part was 101 cm on average, and the thickness was 118 denier.
The average number of alternating twists inserted in the denier, non-bulky parts was 21 per meter. S direction 200 on the thread
When the product was applied with a thread of t/m and used as the weft of a woven fabric, a product with a shantung-like appearance with a natural uneven feel 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 similar to straight raw silk, but it has a slight left and right twist or alternating twist, so even though it is a composite yarn, it has high cohesiveness and is unlikely to separate. 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 due to the difference in yarn length, it has a spun-like texture. If the denier of the filament yarn used for the sheath yarn is thinner, a product with a softer touch can be obtained, and by using single fiber filament yarns with different shrinkage rates, a product with a soft feel can be obtained.

[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: Supply roller 3: Multifilament yarn 4: Supply roller 5: Swivel nozzle 6: Water application roller 7: Fluid injection nozzle 8: Solenoid valve 9: Control device 10: Take-up roller 11: Take-up roller

Claims (4)

[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. , the non-bulky part is a straight part that is bundled by left and right twists, and each part is composed of composite yarns that exist at arbitrary lengths in the longitudinal direction of the yarn and have different yarn lengths. Fancy yarn featuring. (2) In the bulk processing method that imparts loops and sagging by applying fluid jet treatment using two or more multifilament yarns, the core yarn side is subjected to a turning treatment and core/sheath yarns are supplied in the same manner. A method for producing fancy yarn, characterized by performing intermittent fluid injection treatment within the yarn. (3) In the bulking method that imparts loops and sag by applying fluid jet treatment using two or more multifilament yarns, intermittent turning treatment is applied, followed by core/
A method for manufacturing fancy yarn, characterized by subjecting sheath yarns to a fluid jet treatment in the same supply. (4) The method for manufacturing fancy yarn according to claim (2), characterized in that the swirling treatment and the fluid injection treatment are performed alternately within the same supply.