JPH0154449B2 - - Google Patents

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 a multifilament yarn.

[Conventional technology and problems]

Conventionally, many methods for manufacturing slub yarns having thick and thin unevenness in the length direction using multifilament yarns have been introduced. One method is to false-twist the two yarns by giving them a feed difference and partially forming triple windings, but the slab shape is rectangular and the thickness is uniform, resulting in 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 sent out intermittently and turbulently entangled to produce slub yarn. A method is known from JP-A-56-123428. Unlike the above technology, this method can form a soft and bulky slab part using a single thread, but it is difficult to control the excess supply of filament thread stored in the negative pressure box. , 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 straight sections 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 extremely similar to high-grade silk tanned fabrics. It is inexpensive and easy to manufacture and provide.

[Configuration of the present invention]

The present invention has the following configuration to achieve the above object. That is, a plurality of multifilament yarns, at least one of which is a false twisted crimped yarn, are fed separately and without substantially changing the amount of yarn fed, so that all the yarns are simultaneously entangled in a fluid entangling nozzle. This is a method for manufacturing slub yarn characterized by regularly or irregularly changing the amount of fluid supplied to a fluid nozzle during the coalescence process, and more specifically, in the above method, the amount of fluid supplied is varied. This feature is characterized in that a state in which the crimp of the false twisted crimped yarn passing through the fluid entanglement nozzle is apparent and a state in which the crimp disappears or is extremely reduced occur alternately.

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

The present invention is a method for manufacturing a slab yarn as described above, and its feature is that the size and length of the slab portion can be adjusted by arbitrarily changing the amount of fluid supplied in the fluid entangling nozzle. Alternatively, you can freely control the spacing between slabs, etc., and at the same time create raw silk (uncrimped multifilament yarn).
The slub yarn is a like slub yarn, the slub yarn can be clearly identified, and the slub yarn has a soft and silky feel and can be easily produced.

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 manifest state and the disappearing state or the slightly remaining state, and to do this by substantially changing the amount of yarn supplied. It is necessary to perform this while supplying the fluid without any problem, and a specific example of a means for this purpose is to arbitrarily change the amount of fluid supplied to the fluid nozzle, either 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. The material of the constituent yarns constituting the slub yarn of the present invention is not particularly limited, and may be any of natural fibers, recycled fibers, and synthetic fibers. 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 only needs to include at least two multifilament yarns, but
All of the constituent threads must have a stretch recovery rate of 20% or less, and at least one constituent thread must 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 appears that the crimp has been weakened, but if the fabric is heat treated after being made into a fabric, the latent crimp will become apparent and the texture will deteriorate. Even in the bulky thread portion, the intertwining condition becomes poor and the shape 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, loop-like materials in the bulky thread portion become fluffy, which deteriorates the quality of the slab.

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. It cannot be 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 will be small, and the loop-like objects themselves will be small, resulting in a poor visual effect as a slab, making it difficult to call it a slab.

Furthermore, in the non-bulky yarn portion, the length of all constituent yarns must be 1.1 times or less the length of the non-bulky yarn portion. If it is 1.1 times or more, the drawn component yarns are likely to separate and the processability deteriorates, and even if they are intertwined, the slack will not be eliminated, and even smaller loops will occur, causing a snap effect and unraveling. Jitters become extremely poor. Moreover, when it is made of cloth, the entire surface becomes rough and the quality deteriorates.

Therefore, the yarn length, overfeed rate, etc. of each yarn are set within the above-mentioned range by varying and adjusting the speed of the yarn feeding device or the amount of fluid supplied.

More preferably, the single yarn fineness of the yarn having false twist crimp is 2 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 feel.

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 shape of the slab needs to be stable after processing, and if it exceeds 50%, 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 crimp strength.
Specifically, when manufacturing the slab part in the process of manufacturing slub yarn, crimp exists, and the torque force causes crimped snarls.
When producing a straight part, it is necessary that the crimp disappear or be extremely reduced when subjected to tension and elongation. In other words, it is preferable that the material has low crimpability.

Here, the expansion/contraction 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% in the case of polyethylene terephthalate).
℃, 60℃ for nylon 6, set as appropriate for other materials), dried at room temperature, and then measured and calculated according to the JIS method. 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. For example, multifilament yarn processed under normal false twisting conditions is modified, The heat setting effect of false twisting is weakened, the heat setting time is significantly shortened compared to normal false twisting, and the number of false twists is significantly reduced compared to normal false twisting. etc. Among these, those processed at a lower false-twisting temperature than usual are particularly effective; in the case of polyethylene terephthalate yarn, false-twisted yarns processed at temperatures below 170°C and with a stretch recovery rate of 20% or less have considerable elasticity immediately after processing. However, when producing slub yarn, loops and snals are likely to occur, but in the non-bulk yarn part, it takes on a loose wave-like form, and even after being heat-treated after being made into a fabric, it does not have the same thickness as normal false-twisted yarn. It has a soft texture with drapability and no sticky feeling.

Further, 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.

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. After the multifilament yarn B is false twisted between the rollers 2 and 5, it is relaxed and stored between the rollers 5 and the turbulent entangling nozzle 6. After that, the multifilament yarn B joins the multifilament yarn A at the fluid jet disturbance nozzle 6, but the amount of fluid supplied to the fluid jet disturbance nozzle 6 is adjusted by a valve 7, and if the flow rate is low, the fluid jet disturbance nozzle 6 The false twisted yarn B is stored in a relaxed state upstream of the . Further, when the amount of fluid supplied to the fluid jet disturbance nozzle 6 is large, the amount of the multifilament yarn B supplied to the fluid jet disturbance nozzle 6 increases, and the multifilament yarn A and the multifilament yarn B are entangled. While repeating the above-mentioned phenomenon, the yarn is taken off by the take-up roller 8 to produce the slub yarn of the present invention.

FIG. 2 shows an example of a device in which a tensor 9 is installed upstream of the fluid jet disturbance nozzle 6.

Here, the slub yarn produced according to the present invention is
This will be explained with reference to FIG.

FIG. 3 is a diagram showing the appearance of the entire yarn, in which there is a slab part 11 and a monofilament-like non-bulky part, and the slab part has many loops and snarls protruding from it. They have false twist crimp. The structure of the slab portion is 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 engaging the multifilament yarn A and the false twisted multifilament yarn B with one fluid jet disturbance nozzle, the multifilament yarn B
When the multifilament yarn B is withdrawn at a speed lower than the supply speed of B, the amount of fluid supplied to the fluid jet disturbance nozzle is changed. The fluid jet disturbance nozzle becomes passage resistance, and the amount of passage decreases, and a relaxed state increases upstream of the fluid jet disturbance nozzle, and the amount of fluid supplied is large, and the fluid jet force from the fluid jet disturbance nozzle is strong. At this time, the multifilament yarn B is mixed with the multifilament yarn A by increasing the amount of filament yarn B supplied to the fluid jet disturbance nozzle while decreasing the relaxed state by the jetting force of the fluid jet disturbance nozzle. A slub yarn is manufactured by changing the supply length of the multifilament yarn B, which is drawn and disturbed, in the yarn length direction. In other words, the turbulent entangling nozzle has the ability to take up yarn and apply entanglement when injecting 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 usually actively stretched,
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 relaxation state region, and the excess supply of the stored multifilament yarn B is excessively sucked into the nozzle, and the multifilament yarn B is suctioned into the nozzle. Fluid jet disturbance treatment is performed simultaneously with filament yarn A.

Furthermore, before the fluid jet disturbance nozzle has completely sucked up the excess supply of multifilament yarn B,
When the pressure fluid injection is stopped, the injection time of the pressure 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 could not be suctioned by the fluid jet disturbance nozzle increases the speed at which the fluid jet disturbance nozzle excessively suctions the multifilament yarn B the next time the pressure fluid of the nozzle is jetted, It works to maintain an appropriate amount of storage in the relaxation state region and self-controls it.

Preferably, when the tensor is placed upstream of the fluid-jet disrupting nozzle, the nozzle's pressurized fluid is injected to moderately engage the multifilament yarn B and the tensor when the fluid-jet disrupting nozzle over-suctions the multifilament yarn B. This makes it easy to moderate the suction speed and form a slab length that corresponds to the jetting time of the pressure 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) This is a slub yarn that uses turbulent entanglement technology and has spindle-shaped slabs with bulk.

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

(3) Even in the slab part, each thread always becomes a core thread, and its shape retention is high against tension.

(4) The ground yarn section 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 section. It is a form. It also has a soft and bulky feel.

(5) The false twisted yarn in the ground yarn section 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 shape of the slab is highly stable.

(7) The loop-like material in the slab part is twisted and becomes a so-called snarl-like material, resulting in a smooth texture, and furthermore, the snarl-like material becomes rounded and soft due to false twist crimp.

(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.

(9) The fabric has a silk-like texture with rich drapability, making it a luxurious slab fabric.

Example 1 Using the apparatus shown in Fig. 1, polyethylene terephthalate 50d- was used as the multifilament yarn A.
24f, using polyethylene terephthalate 50d-48f as multifilament yarn B, a slub yarn was produced under the following conditions.

Surface speed of supply roller 1 153 m/min Surface speed of roller 2 163 m/min Surface speed of roller 5 159 m/min Surface speed of take-up roller 8 153 m/min Number of false twists 2200 T/m False twist temperature 160°C Turbulent entangling nozzle pressure 4.0Kg/cm ² G Solenoid valve opening time 0.04sec Solenoid valve closing time 0.6~0.8sec The manufactured slub yarn has an average fineness of 102 denier,
The slab portion had an average slab fineness of 145 denier and was spindle-shaped with soft bulk. Fabrics made using this slub yarn have a rich variety of slanted textures, and are 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 0.02 to 0.06 seconds, respectively.
0.8 to 1.0 sec, and slub yarn was manufactured.

The manufactured slub yarn has an average fineness of 102 denier.
The slab part had an average slab fineness of 160 denier, and could be manufactured stably as in Example 1.

Example 3 Using the apparatus shown in FIG. 2, polyethylene terephthalate 50d- was used as multifilament yarn A.
24f, a slub yarn was produced using polyethylene terephthalate 100d-48f as multifilament yarn B under the following conditions.

Surface speed of supply roller 1 142 m/min Surface speed of roller 2 147 m/min Surface speed of roller 5 145 m/min Surface speed of take-up roller 8 145 m/min Number of false twists 1800 T/m False twist temperature 160°C Turbulent entangling nozzle pressure 4.0Kg/cm ² G Solenoid valve opening time 0.01~0.04sec Solenoid valve closing time 1.3~2.1sec The manufactured slub yarn has an average fineness of 153 denier,
The slab part has an average slab fineness of 400 denier, making it very bulky yet soft, and the ground yarn part also has a refreshing 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 by the present invention, and Figure 4 is an enlarged view of the main parts of the same yarn. It is a diagram. 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 thread part (non-bulky part).

Claims (1)

[Scope of Claims] 1. A plurality of multifilament yarns, at least one of which is a false twisted crimped yarn, are supplied separately and without substantially changing the amount of yarn supplied to the fluid entangling nozzle. 1. A method for producing slub yarn, characterized in that the amount of fluid supplied to a fluid nozzle is changed regularly or irregularly when the yarns are entangled at the same time. 2 By changing the amount of fluid supplied, the crimp of the false twisted crimped yarn passing through the fluid entangling nozzle alternates between a state where it is obvious and a state where it disappears or is extremely reduced due to the difference in the amount of fluid supplied. A method for producing a slub yarn according to claim 1, characterized in that the method comprises: