JPS6099034A - Production of slab yarn - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a technique for producing slub yarn by applying a turbulent entangling nozzle to multifilament yarn.

[Prior art and problems]

Conventionally, many methods have been introduced for producing slub yarns with uneven thickness in the length direction using multifilament yarns. One method is to give two yarns a feed difference and false twist them to partially form triple windings.
The slab shape was rectangular and the thickness was uniform, giving it an unnatural shape. .

Further, the triple-wound portion also has the disadvantage that its form is unstable and its high-order processability is poor.

In addition, by using fluid injection disturbance processing technology, the oversupplied multifilament yarn is temporarily stored in a negative pressure box, and the stored amount is intermittently sent out and turbulently entangled to produce slub yarn. A method for doing this is known from Japanese Patent Laid-Open No. 123428/1983.

This technology is different from the above technology in that a soft bulky slab part can be formed using a single thread, but it is difficult to control the excess supply of filament thread stored in the negative pressure box. Therefore, it was an unstable processed yarn.

[Object of the present invention]

The object of the present invention is to improve the drawbacks of the prior art, to stably form a spindle-shaped soft slab portion with extremely high bulkiness, and to have appropriate bulge and drapability between the slabs, but not to be rolled up. It is a slub yarn that has a straight part with no shrinkage and has a silk-like texture as a whole, and by weaving this, we can produce fabrics with great commercial value that are very similar to high-quality shantung-style fabrics made of genuine silk at low cost. It is also easy to manufacture and provide.

[Configuration of the present invention]

The present invention has the following configuration to achieve the above object. That is, when a plurality of multifilament yarns, at least one of which is a false twisted crimped yarn, are supplied separately and all the yarns are simultaneously entangled in a fluid entangling nozzle, the amount of fluid supplied to the fluid nozzle is This is a method for manufacturing slub yarn characterized by regular or irregular change in the amount of fluid supplied, and more specifically, in the above method, false twist winding is performed by passing through a multi-fluid entangling nozzle depending on the amount of fluid supplied. It is characterized by alternating between a state in which the crimp of the crimped fibers is obvious and a state in which the crimp disappears or is extremely reduced and becomes hair-like.

Next, the configuration of the present invention will be explained in detail.

The present invention is a method for manufacturing the above-described slub yarn, comprising:
The feature is that by arbitrarily changing the fluid supply amount in the fluid entangling nozzle, you can freely control the size and length of the slab part, or the interval between slabs, etc. It is a slub-like yarn (not a multifilament yarn) in which the slubs can be clearly distinguished and it is easy to produce a slub yarn with a soft and silky feel.

Further, in the present invention, it is important to use a special type of false twisted crimped yarn as described below.

In the present invention, as described above, when at least a normal multifilament yarn and a false twisted crimped yarn having special conditions are separately supplied to a fluid entangling nozzle, the crimping of the false twisted crimped yarn passing through the nozzle is prevented. It is necessary to alternately generate the manifested state and the disappeared state or the slightly remaining state, and examples of specific means for this include This can be carried out by arbitrarily changing the amount of fluid supplied regularly or irregularly. Furthermore, in order to form such a slab, the relationship between the supply amounts of the false twisted crimped yarn and other yarns must of course be taken into account. However, there is no particular limitation on the thickness of the constituent yarns constituting the slub yarn of the present invention, and any of natural fibers, regenerated fibers, and synthetic fibers may be used. There are also no particular restrictions on the fineness, number of filaments, etc. Further, the material of the false twisted crimped yarn used in the slub yarn of the present invention may be any thermoplastic synthetic fiber such as polyester or nylon.

The slub yarn of the present invention may include at least two multifilament yarns as constituent yarns, but all of the constituent yarns must have an elasticity recovery rate of 2.0% or less, and at least one constituent yarn shall have false twist crimp. This is because if the stretch recovery rate of the component yarn exceeds 20%, the non-bulky yarn portion will feel bulky and lose its drapability.
-It looks like the crimp has been weakened, but after making it into fabric,
Even in the 1° bulk yarn portion where heat treatment reveals latent crimp and deteriorates the feel, the entangled state deteriorates and the form becomes unstable.

In addition, the non-bulky yarn portion in which all the constituent yarns have a stretch recovery rate of 0% tends to sag and has no bulkiness, resulting in a waxy texture and a slimy feel. In addition, in the bulky thread portion, the loop-like material becomes fluffy, which deteriorates the quality of the sislab.

In addition, even if the constituent yarns that form the loop-like material in the bulky thread part have crimps, if they are not false-twisted and crimped, they will not become a snal-like material, so the bulky part will not express suppleness. You can't beat it with a high quality slab.

Next, the length of at least one of the component yarns in the bulky yarn portion must be at least 1.5 times the length of the bulky yarn portion, and must be intertwined. If it is less than 1.5 times, the rate of occurrence of loop-like objects is small, and the loop-like objects themselves are small, making it difficult to call the cis-slab a cis-slab with poor visual effects.

Furthermore, in the non-bulk yarn portion, the length of all the constituent yarns must be 1° or less than the length of the non-bulk yarn portion. If it is more than 1.1 times, the aligned component yarns will be easy to separate and process passability will deteriorate, and even if they are intertwined, the slack will not be eliminated, and small loops will occur. effect, and the unraveling performance becomes extremely poor. Moreover, when it is made of cloth, the entire surface becomes rough and the quality deteriorates.

Therefore, the yarn length of the six yarns, the overfeed rate, etc. are set so as to fall within the ranges described above by varying and adjusting the speed of the yarn feeding device or the amount of fluid supplied.

Furthermore, it is preferable that the single yarn fineness of the yarn with false twist crimp is 2.
It is preferable that it is a denier or less.

This directly affects the feel of the bulky yarn portion, and if it exceeds 2 deniers, it tends to have a rough and hard texture.

More preferably, the elongation of the yarn to serve as the core yarn in the bulky yarn portion should be 50% or less. This is because the form of the slab needs to be stable after processing.
If it exceeds 0%, the shape retention of the slab will deteriorate.

What is more important regarding the false twisted crimped yarn used in the present invention is the strength of the crimp. When there is a crimp, the torque force causes a crimp-like snarl, and when manufacturing a straight part, the crimp disappears or is exposed to the tensile elongation action.
It needs to be extremely low.

It is preferable that ff1J has low crimpability.

Here, the stretch recovery rate refers to the yarn to be measured according to the JIs method, which is wrapped in a skein wound 20 times and subjected to hot water heat treatment for 20 minutes in a relaxed state (90°C for polyethylene teretulate, 60°C for nylon 6, 60°C for other materials). This is the value calculated by measuring in accordance with the JIS method after drying at room temperature. However, if it is not possible to take the skein as described above, perform the same hot water heat treatment on a length that can be sampled, and measure and calculate using the same load.

There are several ways to obtain a false twisted crimped yarn suitable for use in the present invention, such as modification of a multifilament yarn processed under normal false twisting conditions, and a process that is higher than the normal false twisting temperature. The heat setting effect of false twisting is weakened, and the heat setting time is 11 times longer than that of normal false twisting.
], and those processed to reduce the number of false twists to [1], which is larger than the normal false twisting process. Among them, those processed at a lower false-twisting temperature than usual are particularly effective.In the case of polyethylene terephthalate yarns, false-twisted yarns processed at temperatures below 170°C with a stretch recovery rate of 20% or less have a large degree of elasticity immediately after processing. Loops, scars, and curls are likely to occur during the production of slub yarns, but the non-bulk yarns do not have a loose wavy form, and even after being heat-treated after being made into a fabric, they cannot be twisted normally. It does not have the thick, fluttery feel of processed yarn, and has a soft drapey texture.

The fluid entangling nozzle used in the present invention may be any type as long as it interlaces yarns under turbulent flow using compressed air. Particularly preferred is a fluid entangling nozzle having a yarn feeding function. be.

Next, a specific example of the method for manufacturing slub yarn according to the present invention will be explained with reference to FIG.

The multifilament yarn (A) is supplied by a supply roller 1 and guided to a turbulent entangling nozzle 6. Multifilament yarn (
B) is subjected to false twisting between rollers 2 and 5, and then relaxed and stored between rollers 5 and crystal mud entangling nozzle 6.

After that, the multifilament yarn (B) joins the multifilament yarn (A) at the fluid injection seed nozzle 6, but the amount of fluid supplied to the fluid injection seed nozzle 6 is adjusted by the valve 7, so that the flow rate is small. In this case, the false twisted yarn (B) is stored in a relaxed state upstream of the fluid jet disturbance nozzle B.

Furthermore, when the amount of fluid supplied to the fluid jet disturbance nozzle 6 is large,
The amount of multifilament yarn (B) supplied to the fluid jet disturbance nozzle 6 is increased, and the multifilament yarn (A) and multifilament yarn (B) are entangled. While repeating the above-mentioned phenomenon, the yarn is taken up by the taking-up roller 8, and the slub yarn of the present invention is manufactured.

FIG. 2 shows an example of a device in which a tensor 9 is installed upstream of the fluid injection disturbance nozzle B.

Here, the slub yarn manufactured according to the present invention is shown in FIGS. 3 and 4.
This will be explained with a diagram.

FIG. 3 is a diagram showing the appearance of the entire system, and shows the slab part 11.
and a monofilament-like non-bulky part,
A large number of loops and snarls protrude from the slab portion, and these have false twist crimps. The slab portion has a through structure as shown in the enlarged view of FIG. The non-bulky portion is a monofilament-like portion with almost no crimp.

[Function of the present invention]

The functions of the present invention are as follows.

After the multifilament yarn (A) and the false twisted multifilament yarn CB) are engaged with one fluid jet disturbance nozzle, when the multifilament yarn (B) is taken at a slower feeding speed, When the amount of fluid supplied to the fluid jet disturbance nozzle is changed, and when the fluid supply amount is small and the fluid jet force from the fluid jet disturbance nozzle is weak, the multifilament yarn CB) As the passing amount decreases, a relaxed state increases upstream of the fluid jet disturbance nozzle, and when the fluid supply amount is large and the fluid jet force from the fluid jet disturbance nozzle is strong, the multifilament The yarn (Il) is mixed with the multifilament yarn (A) by increasing the amount of filament yarn (B) supplied to the fluid jet disrupting nozzle while decreasing the relaxed state by the jetting force of the fluid jet disrupting nozzle. A cis-slab yarn is produced by changing the supply length of a multifilament yarn (1υ) that is drawn and disturbed in the yarn length direction. In other words, the turbulent entangling nozzle has the ability to take up and entangle the yarn while injecting the pressurized fluid. When the fluid injection disturbance nozzle stops ejecting the pressurized fluid, there is no pulling force, so the amount of multifilament yarn (B) discharged from the relaxed state region downstream of the fluid injection disturbance nozzle is related to the speed of the take-up roller, and is normally The crimp disappears. On the other hand, the amount of multifilament yarn (B) supplied from the false twisting region to the relaxed state region exceeds the discharge amount, and the excess supply is stored in the relaxed state region. However, by developing its own crimp, the excess supply can be stored without substantially changing the thread path.

When the fluid injection disturbance nozzle is injecting the pressurized fluid, the pulling force of the nozzle is transmitted to the relaxed state region, and the excess supply of stored multifilament yarn (11) is excessively sucked into the nozzle; At the same time, the multifilament yarn (A) is subjected to a fluid jet disturbance treatment. .

Furthermore, the fluid jet disturbance nozzle is a multifilament yarn (B
) If the injection of pressurized fluid is stopped before the excess supply is completely suctioned, the ejection time of the pressurized fluid corresponds to the slab length, and the length of the slab can be controlled.

In this case, the excess supply of the relaxed state region that the fluid jet disturbance nozzle could not suction will be absorbed by the multifilament yarn (
13) Increase the rate of suction to keep the reservoir surface in the relaxed state at an appropriate level (11E'/fl Kj', ('C), and self-control.

Preferably, placing the tensor upstream of the fluid jet disrupting nozzle causes the pressure fluid of the nozzle to jet and when the fluid jet disrupting nozzle over-suctions the multifilament yarn (13);
The tensor can be appropriately engaged with the multifilament yarn, the suction speed can be moderately controlled, and it is easy to form a slab length that corresponds to the jetting time of the pressurized fluid from the fluid jetting disturbance nozzle.

Although various methods can be considered for controlling the pressure fluid jet from the turbulent flow entangling nozzle, an effective method is to control the jet by opening and closing a solenoid valve in accordance with a signal. The pressure fluid is preferably a pressure fluid in consideration of low cost and handling, but is not particularly limited.

[Effects of the present invention]

Since the present invention has the above-described configuration and functions, it has the ability to self-control the storage amount even in a relaxed state, and can be stably processed. Furthermore, the slub yarn obtained by this method has the following effects.

(1) Made of slub yarn using turbulent entanglement technology, it has a spindle-shaped slab with bulk.

(2) Due to the false twist crimp, the constituent filaments of the slab portion protrude in a loop or snal shape, giving it a soft texture.

(3) Even in the slab part, the single thread is a spiral core yarn and has high shape retention against tension.

(4) The ground yarn part is a state in which the false twisted yarn whose crimp has disappeared and the raw silk are aligned, and these two yarns are hardly intertwined, or even if they are intertwined, they can be clearly distinguished from the slab part. It also has a soft feel and a bulky feel.

(5) In the ground yarn part, the false twisted yarn has a loose wave-like form and has a silk-like luster and feel.

(6) The slab part is more strongly intertwined than the ground thread part, and the slab has high shape stability.

(7) The loop-like material in the slab part has a soft twist, so it has a smooth texture.False-twisting and crimp make the material round and soft. .

(8) If the single yarn fineness of the false twisted crimped yarn is 2 denier or less, a softer slab will be obtained, and if the fineness is the same, the number of constituent fibers will increase, resulting in a dense slab.

(The 9-inch fabric has a silk-like texture with rich drapability, and is a slub fabric with a high t-shirt and feel.

Example 1 Using the device shown in Fig. 1, multifilament yarn (A)
Using polyethylene terephthalate 50d-24f1 as the multifilament yarn (B) and polyethylene terephthalate 50d-48f as the multifilament yarn (B), a slub yarn was produced under the following conditions.

Surface speed of supply roller 1 153 m/min Roller 2
Surface speed of 163 m/min Roller 5 surface speed
159 m/min surface speed of take-up row 28 153
m/min false twisting number 2200 T/m false twisting temperature 160°C turbulent entangling nozzle pressure 4,0 kg7cm2G solenoid valve opening time 0.04 sec solenoid valve closing time 0.6~0.88eC The produced slub yarn has an average The fineness was 102 denier, and the slab portion had an average slab fineness of 145 denier, and was soft and spindle-shaped with bulk. The woven fabric using this slub yarn has a shantung style and is rich in variety, yet is soft and elegant.

Example 2 Using the same equipment, yarn, and processing conditions as in Example 1, the opening time and closing time of the solenoid valve were each 0.02 to 0.06 sec%.
o, s to IJ see, and slub yarns were produced.

Manufacture [7] The average fineness of the slub yarn was 102 denier, and the average slub fineness of the slub portion was 160 denier, and it could be stably manufactured as in Example 1.

Example 3 Using the device shown in Fig. 2, multifilament yarn (A)
as polyethylene terephthalate 5 (ld-24f,
A slub yarn was produced using polyethylene terephthalate 100d 748f as the multifilament yarn (11) under the following conditions.

Surface speed of supply roller 1 142 m/min Roller 2
Surface speed of roller 5: 147 m/min
145 +n/min Surface speed of take-up roller 8 145
m/min false twisting number 1800 T/m false twisting temperature 160℃ Turbulent entangling nozzle pressure 4゜Okg/Crn2G solenoid valve opening time 0.01~sail 04sec solenoid valve closing time 1-3~2
．． The slub yarn produced for 1 sec had an average fineness of 153 denier, and the slub part had an average slub fineness of 400 denier, making it very bulky yet soft, and the ground yarn part also had a gentle texture. .

[Brief explanation of drawings]

Figures 1 and 2 are schematic diagrams showing a slub yarn processing apparatus of the present invention, Figure 3 is a side view showing an example of a slub yarn manufactured according to the present invention, and Figure 4 is a similar main part. This is an enlarged view. DESCRIPTION OF SYMBOLS 1... Supply roller, 2... Roller, 3... Heater, 4... False twisting device, 5... Roller, 6... Fluid injection disturbance nozzle, 7... Solenoid valve, 8 ...take-up roller,
9... Tensor, 11... Slab part, 12... Ground yarn part (non-bulky part). Agent: Patent Attorney Makoto Ogawa − Patent Attorney: Ken Noguchi Patent Attorney: Kazuhiko Saishita

Claims (1)

[Claims] 1. When a plurality of multifilament yarns, at least one of which is a false twisted crimped yarn, are supplied separately and all yarns are simultaneously entangled in a fluid entangling nozzle, A method for producing slub yarn characterized by changing the amount of fluid supplied regularly or irregularly. 2. Due to the difference in the amount of fluid supplied, the crimp of the false twisted crimped yarn passing through the multi-fluid entangling nozzle alternately occurs in a state where it is apparent and a state where it disappears or is extremely reduced. A method for producing a slub yarn according to claim 1.