JP2690346B2 - Slab yarn manufacturing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a slab yarn in which a fiber group is wound around a main fiber yarn in some places, and the slab portion is extremely soft as compared with a conventional slab yarn. The present invention relates to a method of manufacturing a slab yarn.

[Prior Art] Conventionally, so-called slab yarn in which the yarn is thick in places has been known, and as a typical manufacturing method thereof, a spinning machine, that is, a draft roller part is mechanically stopped instantaneously, or There are a method of adding an operation such as increasing the instantaneous rotation speed, and a method of forming a spun yarn after processing the raw cotton itself so that it becomes a slab portion in advance.

[Problems to be Solved by the Invention] In the case of such a conventional method, a part of the roller part needs to be mechanically changed or deformed,
It is necessary to integrate different fiber groups that cause slab generation into the main fiber group before spinning with spinning, and various different slab yarns cannot be easily obtained, and the slab portion is formed. Since the group of fibers is hard and is tightened by twisting, it has a drawback that it has a hard appearance and feel even when made into a fabric, and does not become a feminine-like fabric with light looseness.

[Means for Solving the Problems] The present inventors have arrived at the present invention as a result of research on a method for producing a slab yarn in order to solve such problems. That is, the present invention is a method for producing a slab yarn in which a fiber group (B) is wound around a fiber bundle (A) in a non-uniform manner, and the fiber bundle (A) running while being twisted.
By accumulating the fiber group (B) near the fiber bundle and contacting the fiber bundle (A) due to the increased accumulation amount, the fiber group (B) accumulated by the contact is wound around the fiber bundle (A) at a stretch. A method for producing a slab yarn, which is characterized by the above.

One of the most preferable examples of this manufacturing method is that the fiber group stored in the fiber storage pocket (accumulation part) using an air fluid pipe (narrow pipe) is in that state (that is, it is twisted by itself). It is wrapped around the main fiber bundle (without performing). Therefore, the slab yarn obtained is
The slab shape (thickness, length, period of the slab portion) becomes non-uniform, and the slab portion becomes extremely flexible, which has never been seen before.

Next, the method of the present invention will be described in detail with reference to the drawings. First, FIG. 2 shows a twisting mechanism in conventional ring spinning. As is clear from the figure, the fiber group sent out from the gripping roller (1) passes through the snare wire (2), the traveler (3) and the ring (4), and is wound up by the bobbin (6), and the twisting and winding step is performed. To finish. That is, when the yarn is wound on the bobbin (6000 to 15000r / m) that rotates together with the spindle (5), the traveler (3) slides and rotates on the ring (4) due to the component force generated by the tension. Can be hung. At this time, the twist is usually twisted up to the roller nip point (7) through the snare wire (2).
Therefore, the fibers spun from the nap point are bound together,
It becomes a twisted and uniform thread.

By the way, the methods of spinning slab yarn can be roughly classified into the following methods, as described above. One is a method of mechanically changing the amount of fibers to be sent, for example, a method using a spinning roller having a unique shape, a method of temporarily stopping the spinning roller or changing the speed. It is a method that mixes factors such as different fiber lengths, different denier, specially processed materials, etc., which should form a slab shape, and causes non-uniform drafting during roller drafting by spinning. When these methods are used, the resulting slab yarn has a single shape, is not polymorphic (thickness, length, fiber density) and lacks softness in the slab portion. When these slab yarns are woven, a woven pattern is obtained. Has a drawback that it is fixed because of the single shape of the slab, and that a woven pattern pattern habit (which means the appearance of a slab with periodicity and continuity) is likely to occur. Therefore, conventional mechanical operations and a method of changing part of the roller part (main roller or auxiliary roller and supply equipment, etc.), or the fiber bundle itself is made into a slab-like material, spun by adding other special processing, and slab yarn In the method of making, the slab portion of the obtained slab yarn has a large fiber yarn density (heavy and hard) and is a heavy and hard slab portion after weaving (fiber yarn density is high), so the slab shape change after weaving There are few slab shapes, and the slab shape is almost uniform, which tends to limit product diversification. In view of these problems, the present invention aims to produce a polymorphic soft slab yarn, that is, a slab yarn having a sublimable slab portion having low flexibility and fiber yarn density. The slab yarn obtained by the present invention has a light slab portion and various slab morphologies, so that the slab shape change after weaving is large. As a result, in the case of mixed cotton of various materials, since the color change after weaving and the slab thickness change are various, it is possible to provide a wide range of woven pattern patterns.

A typical example of the method of the present invention will be described with reference to FIG. 1. First, the fiber bundle (B) is supplied to a gripping roller, and the fiber bundle (B) spun from the roller nip point is sucked into an air fluid pipe and is substantially Then, the fiber group (B) is allowed to pass through the tube without twisting, is discharged from the fluid tube together with air, and the discharged fiber group (B) is induced and accumulated in the fiber accumulation pocket portion. As is clear from the enlarged view of the fiber storage pocket shown in FIG. 3, the accumulated fiber increases in amount, and when the volume increases, the main fiber is twisted by the rotation of the spindle while running alongside it. The fiber group (A) is entangled with the fiber group (B) accumulated in the fiber accumulation pocket portion to form a thread having a slab shape. Therefore, as for the fiber group to be a slab, slab yarns of various sizes can be obtained as shown in Fig. 4 depending on the pocket capacity (hole diameter x depth), and the main fiber group (A) (Fig. 3). 9) and the slab fiber pocket nozzle (mesh-shaped nozzle for letting out only the air discharged from the air fluid pipe and the air of the fiber group (B)) (8) depending on the distance (10) Can make periodic slab yarn.

To describe this fiber pocket for slabs in detail,
In FIGS. 3A and 3B, the slab fiber group (B) is spun from the gripping roller, passes through the air fluid pipe in a non-twisted state, and is sprayed onto the slab fiber pocket (7). Further, an air bleeding net 8 is provided to allow the air in the fiber pocket to escape without disturbing the slab fiber group (B) (only the slab fiber group is accumulated in the pocket).

The single fiber constituting the main fiber group (A) used in the method of the present invention may have a thickness of 0.5 to 3.0 denier and a length of 38 mm or more and may be filament fiber. The total denier of the main fiber group (A) is preferably 100 to 500 denier from the balance of the size of the soft slab shape and the fiber weight after drafting. On the other hand, the thickness of the monofilament for forming the slab part is 0.5 to 2.0 denier considering the entanglement with the main fiber group, and the length is
It is preferably 35 mm or more, and may be filament fiber. The total denier of the fiber group (B) after being made into a slab yarn is an average in consideration of the form of the soft slab and the appearance of long and short cycles.
10 to 50 denier (about 10% of the main fiber group) is preferred. However, the shape of the slab changes slightly depending on the shape of the single fiber, that is, the crimpability, the stiffness of the fiber (sublimation), the type of the fiber, and the like. Also, if necessary, when the filament fiber is supplied by a non-draft method, that is, when the filament fiber is straightly fed through the air fluid pipe without passing through the draft roller, the change in the slab shape becomes larger. From these facts, the slab morphology is the pocket capacity of the slab fiber group (hole diameter 11 × depth 1
With 0), it is possible to control the generation of slabs and the slab generation long / short cycle (the distance 10 between the passage point 9 of the A fiber group and the pocket portion of the B fiber group). The hole diameter of the pocket (7) is 4.0-9.0φmm, the pocket (7)
The depth (10) is 4 to 12 mm, and the energy source for accumulating the fiber group (B), that is, the soft slab fiber group in the pocket is preferably air from the economical point of view. It becomes unnecessary when you carry. The stable appearance of the soft slab greatly changes depending on what kind of conditions are used as a method for releasing this air. For example, when the air cannot escape smoothly, a spiral state occurs in the pocket, and the fibers in the pocket scatter. Therefore, as a method of stably accumulating the soft slab fiber group in the pocket,
Use a net for part of the pocket. As for the specifications of the air vent net, the material is 25 to 45 with good fiber peeling property.
The mesh is good. Further, the number of twists of the main fiber group (A) and the slab fiber group (B) is preferably 500 to 1,700 times / m for preventing the movement of the soft slab portion. Further, as the air pressure when the slab fiber group (B) is passed through the air fluid, the fiber group (B) is stably sucked from the fiber suction port and passes through the air fluid pipe, and the fiber group (B) is stable in the accumulation pocket. 0.3 to be accumulated
~ 0.7 kg / cm ² is suitable. And it is preferable that the bobbin be wound up at a speed of 10 to 25 m / min.

Examples of the fiber material used in the present invention include synthetic fibers such as polyester fibers, nylon fibers and acrylic fibers, semi-synthetic or regenerated fibers such as acetate and rayon, and natural fibers such as cotton, silk, wool and hemp.

 Hereinafter, the present invention will be described with reference to examples.

Examples 1 to 4 Four kinds of slab yarns were produced using the materials shown in FIG. At that time, 32 mesh was used as the air vent mesh, the air pressure was 0.5 kg / cm ² , the twist number was 1200 times / m, and the winding speed was 20 m / min.

Fig. 4 (a) shows the case of using a device with a fiber pocket capacity of hole diameter 6φmm and depth 9mm, average period 0.5-1.0.
A soft slab yarn with irregular periodicity of m. Fig. 4 (b) shows the case where the fiber pocket capacity is spun with a smaller capacity than that of Fig. 4 (a) and the slab cycle is 0.4 to 0.8m. The irregular periodicity of. Figure 4 (c) shows a hole diameter of 4.5φmm x
A filament fiber was used as the fiber group (B) using a device having a fiber pocket capacity of 9 mm in depth. As a result, the slab period was 0.4-0.8m. The sample in FIG. 4 (d) is an example in which a device having a fiber capacity of 6 mm in hole diameter and 6 mm in depth is used, and the slab cycle is 0.1 to 0.5 m.

In each of these samples, the slab portion was soft, and when a woven fabric was produced using these slab yarns, a woven fabric having a warmth of feminine tone was obtained in each case.

Examples 5 to 8 The same procedures as in Example 1 were carried out except that the materials used were changed as shown in Table 1, and the results shown in Table 1 were obtained.

The slab yarn obtained in the above example, the slab portion is soft, and when a woven fabric is made from such a slab yarn,
The fabric was very soft, light and gentle. On the other hand, the woven fabric prepared from the slab yarn of the comparative example had a hard slab portion and gave a lumpy feeling.

In the above table, the texture (flexibility) determination method was determined by the feel and sensory test according to the following methods. First, hang the thread on the tube
Five pieces are prepared as 20 cm knitting judgment samples, and judgment is made based on the evaluation points in four stages. Very soft (soft) is marked with ◎, and strong (hard) is marked with x, ○ to ◎
The above is referred to as having flexibility (softness). However, before the judgment, the same material as that of the concerned yarn is used, and an ordinary spun yarn is tubularly knitted at the same knitting density as the slab yarn, and the feeling of touch and the feeling of the body are confirmed by a sensory test, and the judgment is made ◎ for comparison.

When there is no difference from the normal spun yarn (control yarn) made of the same material as the slab yarn ... …… ◎ When it is slightly harder than the ordinary spun yarn (control yarn) made of the same material as the slab yarn …… ○ When compared to a normal spun yarn made of the same material as the slab yarn (control yarn), it is harder. △: Compared to a normal spun yarn made of the same material as the slab yarn (control yarn) When it is very hard ... × The slab shape variability is expressed by the degree of declining change in the slab width (provisional measurement method φ _t ) after the slab yarn is cylindrically knitted. Therefore, the slab yarn is cylindrically knitted in the same manner as the texture determination method, and 5 pieces of this sample are prepared as knitting determination samples having a knit length of 20 cm. After that, the slab width after knitting was measured on a scale, n = 5 was measured from one piece, and the change in slab diameter (φ) was expressed by the following formula, and the degree of change was 4 Evaluate in stages.

However, φ: Diameter of slab before knitting (apparent diameter) φ _t : Width of slab after knitting The change evaluation rank in the above formula is in accordance with the table below. To do.

Degree of change 20% or less …… × 21 to 35 …… △ 36 to 50 …… ○ 51 to above …… ◎ The apparent thickness (diameter) of the slab is the panel board of the slab thread wound on the seri plane. It is determined by eye measurement using a scale. At that time, use a magnifying glass of 5 to 10 times. Even if the outer surface fiber composition is small, if the fibers are entangled, the slab apparent thickness (diameter) is measured.

[Brief description of the drawings]

FIG. 1 is a side view and a plan view of a region from a gripping roller to a slab yarn forming portion of an apparatus capable of carrying out the method of the present invention. Particularly, (a) shows a case where there is one main fiber yarn. , (B) is the case of _two (A ₁ and A ₂ ). FIG. 2 is a process diagram of a conventional twisting mechanism for ring spinning. And FIG. 3 is an enlarged view of the fiber storage pocket portion in the apparatus capable of carrying out the method of the present invention. Of these, (a) is a side view and (b) is a plan view. FIG. 4 is a diagram showing the slab form of the slab yarn obtained when the pocket capacity and the slab material are changed.

Claims (1)

(57) [Claims] 1. A method for producing a slab yarn in which a fiber group (B) is wound around a fiber bundle (A) in a non-uniform manner, and a fiber is present near the fiber bundle (A) running while being twisted. A feature is that the group (B) is accumulated, and the fiber bundle (A) is brought into contact with the fiber bundle (A) by increasing the amount of accumulation, and the fiber group (B) accumulated by the contact is wrapped around the fiber bundle (A) at once. Method for producing slab yarn.