JPS5933692B2 - How to wind synthetic fibers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a novel method for winding synthetic fiber yarn, and its purpose is to produce an interlaced yarn in which warp lines and warp hanging are less likely to occur when weaving an interlaced yarn as a warp yarn. Our goal is to provide the following.

In order to perform weaving efficiently and to obtain high-quality fabrics, the warp yarns used up to the weaving process are required to have a high degree of cohesiveness.

Conventionally, yarn twisting or sizing has been applied to impart conjugation properties, but this can damage the fibers and significantly increase costs, so reducing costs by simplifying the process is a major concern. It was hot. For this purpose, attempts have been made to use, as warp yarns, interlaced yarns that have been treated with fluid to cause entanglement between the filaments of the fibers, giving them cohesive properties and imparting performance equivalent to that of true twisting and sizing. Use of such an interlaced yarn not only omits the twisting and sizing process, but also eliminates the need for desizing after weaving, and has the advantage of simplifying the scouring and dyeing process.

On the other hand, when interlaced yarns are used as warp yarns, warp defects characteristic of interlaced yarns are more likely to occur in the warp direction of the fabric than when ordinary conjugated yarns coated with sizing agents are used as warp yarns. The present inventors believe that the defect in the quality of the fabric due to the stripes in the warp direction is that unevenness in the degree of interlacing of the interlaced yarn used as the warp exists on the woven fabric as it is, especially along the length direction of the yarn. I learned that this tendency is remarkable when the degree of interlace unevenness is large.

Conventionally, when interlaced yarn is interlaced using a fluid treatment nozzle installed directly above the twine winding machine and then wound as is, the overall conjugation (twisting effect + interlacing effect) is almost constant considering the number of twists. There was a method of decreasing the rotational speed of the bobbin as the winding time increased so that

In this state, as the number of twists gradually decreases from the start of winding, the degree of interlacing conversely increases gradually. The inventors
The warp lines that occur when glueless weaving is performed using the interlaced yarn wound in the above-mentioned method as the warp yarn have a high twist count (inner package layer (i.e., the beginning of the volume) is due to the fact that the degree of interlacing inevitably decreases.

He discovered that in order to prevent this warp, the degree of interlacing of the warp yarns should be set so that the degree of interlacing is always constant along the yarn, and the yarn was interlaced with a fluid treatment nozzle and twisted. However, when winding the interlaced yarn onto the bobbin, the winding tension is gradually increased, and the number of revolutions of the bobbin is gradually decreased from the start of winding so that the degree of interlacing becomes substantially uniform along the length of the yarn. A winding method was proposed. However, it has been found that when the interlaced yarn thus obtained is woven as a warp, a new problem arises, that is, a warp-hanging defect occurs in the warp direction of the fabric.

As a result of various studies on this warp-hanging defect, the inventor found that this warp-hanging is caused by the yarn in the inner layer of the part wound by the yarn winding machine. It was determined that this is due to the fact that the natural shrinkage rate of the strip (hereinafter simply referred to as "shrinkage rate") is higher than that of the outer layer.

Furthermore, as a result of various studies on the reasons why the shrinkage rate of the inner layer of the part is higher than that of the outer layer, we found that when winding the interlaced yarn onto the bobbin while twisting it, the number of revolutions of the bobbin was gradually increased from the start of winding. It has been discovered that by increasing the shrinkage rate and then gradually decreasing it, it is possible to achieve a substantially constant shrinkage rate along the length of the yarn.

However, when winding with this method, the degree of interlacing becomes non-uniform, so even though the phenomenon of warp hanging disappears, a contradictory phenomenon occurs in that warp stripes appear due to variations in the degree of interlacing. The present inventors have further studied the above-mentioned problems and have arrived at the present invention.

That is, in the present invention, when interlacing a yarn using a fluid treatment nozzle and winding it onto a bobbin while twisting, the bobbin rotation speed is gradually changed from the start of winding to the winding time. The yarn is wound so that the shrinkage rate is substantially constant along the length of the yarn, and
A winding of synthetic fiber yarn characterized in that the fluid pressure and/or fluid treatment speed of a fluid treatment nozzle is gradually changed so that the degree of interlacing is substantially constant along the length of the yarn. This is how to take it. Embodiments of the present invention will be described below with reference to the drawings.

In Fig. 1, the speed V (m/min) is sent from the feed roller via the traveler 3, which freely rotates inside the traveler ring 2, which surrounds the bobbin 1, which is forcibly rotated at a speed of S (Rpm), and makes a vertical traverse motion. ) is wound around the bobbin 1 to form the package 5. The present invention provides a winding machine in which the yarn Y supplied by the bobbin 1 is wound around the bobbin 1 to form the package 5. A nozzle 7 is provided to interlace the traveling yarn, and the yarn is wound so that the shrinkage rate is substantially constant along the length direction by gradually changing the rotational speed of the bobbin 1. The pressure of the fluid supplied to the fluid processing nozzle (hereinafter simply referred to as "fluid pressure") is gradually changed, or/and the speed at which the yarn is supplied from the feed roller 4 (hereinafter simply referred to as "processing speed"). By varying this, the purpose of making the degree of interlacing uniform along the length of the yarn is achieved.

First, a specific method of making the degree of interlacing uniform by changing the fluid pressure P (Kg/Crii-G) when the processing speed V (m/Min) is constant will be described. In Fig. 2, the horizontal axis shows the elapsed time θ (minutes) after the start of winding, the vertical axis shows the rotation speed S (Rpm) of the bobbin, and the curve a shows a certain pneumatic pressure (e.g. 4.0.
kg/~-G) and a certain shrinkage rate (e.g. 1.5%
) is the relationship W, x, y, and Z between the bobbin rotational speed S and the winding elapsed time θ, which is the fluid pressure P (K
9/CTil-G), the relationship between the rotation speed S of the bobbin and the elapsed winding time θ is shown.

In order to obtain a certain degree of interlacing, the higher the bobbin rotation speed S, the higher the fluid pressure P is required. Since the tension is high, a high fluid pressure P is required to obtain a particular degree of interlacing. A diagram such as FIG. 2 can be determined experimentally to determine the desired shrinkage and degree of interlacing. Even if the fluid pressure P is changed, the effect on the shrinkage rate of the yarn can be ignored, so in Fig. 2, the curve A
．． The intersection points 1, 2, 3, 5, and 5 with 5w, x, y, and z have a specific shrinkage rate (for example, 1).

5%) and the degree of interlacing is a certain value (for example, 40)
ke/m).

Therefore, by changing the rotation speed of the bobbin along curve a in Figure 1, the shrinkage rate becomes constant, and the fluid pressure remains at point 1.
, 2, 3, 4, 5, and 6 along the elapsed winding time, that is, the intersection point θ and P in FIG.
The degree of interlacing can be kept constant by changing it as shown by curve b in the relationship diagram). Next, a specific method of making the degree of interlacing uniform by changing the processing speed V when the fluid pressure P is kept constant will be explained.

In Fig. 5, the horizontal axis shows θ and the vertical axis shows S, and the curves C, d, e, and f represent a certain shrinkage rate (for example, 1.5%) at a specific processing speed V. The plots of curves C, d, e, and f are points that give a specific degree of interlacing (for example, 40 digits/m).

Therefore, in Fig. 5, the shrinkage rate can be determined by connecting the plots continuously along the winding elapsed time θ from the conditions of the points that give a specific degree of interlace (for example, the degree of interlace of the plot is 40 pieces/m). It is possible to obtain a curve in which the interlace is constant and the interlace is constant, and its specific state is shown in curves g (temporal variation of S) and h (temporal variation of V) in FIG. By changing the bobbin rotation speed S and the peripheral speed (7) of the feed roller along curves g and h in Figure 6 with the elapsed winding time θ, the shrinkage rate can be kept constant along the length direction of the yarn. Moreover, it is possible to obtain an interlaced yarn with a constant degree of interlacing.

At this time, as in Fig. 5, when the processing speed is varied, the relationship curve between θ and S that gives a constant degree of interlacing and a constant shrinkage rate is found from the intersection of each of the two curves. , it is also possible to obtain a processing speed curve h.

Furthermore, a case will be described in which the fluid pressure P and processing speed V are changed along with the elapsed winding time.

In FIG. 7, the horizontal axis shows the winding elapsed time θ, and the vertical axis shows the bobbin rotation speed S, and the curves c', d', e'
and f' indicate the relationship between the bobbin rotation speed S and the elapsed winding time θ that give a certain shrinkage rate (for example, 1.570) at a specific processing speed (Ve, d, Ve, f). The plots 21, 22, .
．． Points that give a specific degree of interlacing (for example, 40 g/m) when the
...35 is a constant pressure B (for example, 3 kg/(177 fG)
), the plots 41, 42, .
52...54 is a constant pressure D (for example, 6 kg/CTl
G), a specific degree of interlacing (40 digits/m) is given.

Therefore, in accordance with the conditions of the points that give a specific degree of interlacing in FIG.
→23→43→45→46) It is possible to obtain a line with a constant shrinkage rate and a constant degree of interlacing (for example, curve j), and the specific winding method is as shown in curve m (S of Time variation Uk (temporal variation of V) and l (temporal variation of P)
is shown.

Therefore, by changing the bobbin rotational speed S, the circumferential speed M of the feed roller, and the compressed air pressure P along the curves M, k, and l in FIG. As a result, an interlaced yarn having a constant shrinkage rate and a constant degree of interlacing can be obtained.

In addition, in the present invention, in order to make the shrinkage rate substantially constant along the length direction of the yarn, it is necessary to gradually change the rotation speed of the bobbin after the start of winding. It is necessary to correct for variations in the degree of interlace that vary with changes in rotational speed by changing the fluid pressure and/or processing speed to make the degree of interlace substantially constant.

The fact that the shrinkage rate is substantially constant means that the variation in the shrinkage rate is within a range that does not cause warping during weaving, and usually the maximum and minimum values over the entire yarn are within a range. It is sufficient if the difference R is less than 0.5%. In the present invention, the natural shrinkage rate is 65% when the yarn is unwound from the parts.
It refers to the rate of shrinkage after 24 hours of being left in an RH atmosphere.

In the present invention, the degree of interlacing is a value obtained by calculating the number of times a hook is caught in one meter using the hook drop method.

In addition, the total load of the hook is usually 0.05 to 0.19/De
shall be. Yarn (multifilament) applicable to the present invention
may be any synthetic fiber such as polyester, polyamide, polyacrylonitrile fiber, etc.
Although there is no particular restriction on the total denier, it is usually suitably employed when the single fiber has a denier of 1 to 10 de and the number of filaments is 10 or more. In addition, as a fluid treatment nozzle, a nozzle shown in Japanese Patent Publication No. 37-1175, a processing nozzle shown in Japanese Patent Publication No. 44-6131, or a nozzle shown in Japanese Patent Publication No. 46-35901 are used. Any nozzle may be used as long as it can impart interlacing properties to the yarn, such as a resonant type processing nozzle such as the one described above.

The fluid supplied to the fluid treatment nozzle is preferably compressed air, but
Other inert gases, water, etc. may also be used. In the context of the present invention, the fact that the degree of interlace is substantially uniform in the length direction means that the degree of interlace is within a range of variation that does not cause warp stripes when weaving, and the variation in measured values is suppressed. Normally, the difference R between the maximum and minimum values is 50% of the average value.
It is sufficient if it is less than %.

In the present invention, the degree of interlacing is at least 15 ke/w in order to use the interlaced yarn as the warp for weaving without twisting or sizing.
It is desired that the density be at least 30 strands/m and preferably at least 80 strands/m.

In the present invention, it is not necessary for the fluid treatment nozzle and the rappet guide to be separated, and it goes without saying that they may be integrated depending on the situation.

As described above, according to the present invention, the shrinkage rate is uniform along the length direction of the yarn, and the degree of interlacing can be made uniform, so even when used as a warp as it is, the warp stripes peculiar to interlaced yarn can be made uniform. And the occurrence of strain can be prevented.

Next, the present invention will be further explained with reference to Examples. Example 1
Nylon 6 (70de'/16fi1-) multifilament with yarn passage 101'' inner diameter 2, compressed air injection port 11
Interlace processing is performed using an R1φ turbulent nozzle,
The yarn was wound into parts on a twine winder at a speed of 900 m/min.

The rotational speed S (ROm) of the bobbin at this time was changed along the curve a in FIG. 2.

When the compressed air pressure P in curve a was set to 4k9/Cf/LG, the degree of interlacing changed as shown in curve 1 in FIG. 3. The relationship between the bobbin rotation speed S and the elapsed winding time θ so that the degree of interlacing is always 40 kg/m when the compressed air pressure is set to a constant value is P = 3, 3, 8, 5, and 6 kg/CrilG. The curves W, x, y in Figure 2 for
I was able to find and z.

Intersection points 1, 2...6 of curve a and curves W, x, y, and z
is the shrinkage rate by multiplying each winding elapsed time θ by 1.5.
This point shows the relationship between the bobbin rotation speed and the pneumatic pressure, which depends on the interlacing degree at 40 k/m.

Therefore, when the pressure P at these points 1, 2, . . . 6 is plotted against the elapsed winding time θ, curve b in FIG. 4 can be obtained. By changing the bobbin rotation speed S along the curve a and the pneumatic pressure P along the curve b with the elapsed winding time θ, the shrinkage rate is almost constant (Maxl. 7%, Minl. 3%). %), and the degree of interlacing is almost constant (Max 45 pieces/M.min 38
It was possible to obtain an interlaced yarn of

(Figure 3, curve j). When the fiber thus obtained was subjected to weaving as it was (no twist, no glue) as a warp, no warp hangings or warp stripes were observed, and a good woven fabric could be obtained.

On the other hand, when the rotation speed of the bobbin is changed along curve a, the compressed air pressure is P
When the yarn was interlaced and wound at a constant value of -4k9/Cfl-G, the shrinkage rate was as follows along the length direction of the yarn:
Although the degree of interlacing was almost constant (as shown in curve 1 in Figure 3), the degree of interlacing varied greatly (as shown in curve 1 in Figure 3), so when it was used as a warp for weaving, almost no warping was observed, but the degree of interlacing was very variable (as shown in curve 1 in Figure 3). It became something of low quality.

Example 2 Using the same equipment as in Example 1, nylon 6 (7
A multifilament of 0 de'/16 fi 1) was wound into parts at a pneumatic pressure of P-3.8 kg/d-G.

The relationship between the bobbin rotation speed S and the elapsed winding time θ when the shrinkage rate is 1.5% by varying the processing speed v is = 950.
Curves C, d, e, and f in FIG. 5 were obtained at 900, 840, and 780 m/min. Plots 11, 12...17 in the same figure have an interlacing degree of 4.
This is the point that gives 0 ke/m. Therefore these points 11,1
Bobbin rotation speed S and processing speed V in 2,...17
By plotting this against the elapsed winding time θ, curves g and h in FIG. 6 could be obtained.

By changing the winding elapsed time θ, the bobbin rotation speed S along the curve g, and the processing speed V along the curve h, the shrinkage rate is almost constant (Malxl, 7%, M
inl. 4%) and the degree of interlacing is almost constant (M
ax44ke/M. ．． It was possible to obtain an interlaced yarn with a density of 37 pieces/m.

When the fibers thus obtained were subjected to weaving as they were (no twist and no glue) as warp threads, no warp hangings or warp stripes were observed, and a good woven fabric could be obtained.

Example 3 Using the same equipment as in Example 1, nylon 6 (70 de'/
16fi1) multifilament was wound into parts.

The relationship between the bobbin rotation speed S and the elapsed winding time θ when the shrinkage rate is 1.5% by varying the processing speed V is V-950.
, 900, 840, and 780 m/min, curves c', d', e', and f' in FIG. 7 were obtained.

Plots 21, 22, . . . 27, which die in the same figure, have a compressed air pressure of 3.8k9/c! At 1G, ports 31 and 32
,...35 has a compressed air pressure of 3k9/c-! When IIG, plots 41, 42,...46 have a compressed air pressure of 5 kg.
/CrIlG, plots 51, 52,...54
The compressed air pressure is 6kg/cl! This is the point where the degree of interlacing is 40 digits/m in the case of G. These points 31,2
3, 43, 44, 45, 46} bobbin rotation speed S
, the processing speed and pneumatic pressure P are plotted against the winding elapsed time θ, and the curve M. in FIG. We were able to obtain K and l.

Along with the winding elapsed time, the bobbin rotation speed is determined along the curve m,
By varying the processing speed along the curve K and the pneumatic pressure along the curve I, the shrinkage rate can be kept almost constant (M
axl. 7%, Minl, 47O), and the degree of interlacing is almost constant (Max 45 pcs/M.min 37 pcs/
m) interlaced yarn could be obtained.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a yarn winding machine showing one embodiment of the present invention, FIGS. 2, 5, and 7 are diagrams showing the relationship between winding elapsed time θ and bobbin rotation speed S, and FIG. The figure shows the relationship between the elapsed winding time θ and the degree of interlacing (IL degree), the figure 4 shows the relationship between the elapsed winding time θ and the fluid (compressed air) pressure P, and the figure 6 shows the elapsed winding time. θ and bobbin rotation speed S or processing speed V
FIG. 8 is a diagram showing the relationship between the winding elapsed time θ and the bobbin rotation speed S, the fluid (compressed air) pressure P, or the processing speed. In Figures 1 to 8, 1... bobbin, 2... traveling ring, 3... traveler, 4...
・Feed roller, 5...Package, 6...
・・Ballooning fixed guide (rappet guide), 7・
...Fluid processing device, Y... Yarn, a...
...Curve showing the relationship between S and θ that gives a constant shrinkage rate, W, x, y, and z...Curve showing the relationship between θ and S that gives a constant IL degree, i・・・・・・Curve showing the relationship between θ and IL degree when winding along a, j・
... θ and IL when wound by the method of the present invention
Curve showing the relationship between θ and P when P is changed, C, d, e, f, c
', D2, e', and f'... Curve showing the relationship between θ and S that gives a constant shrinkage rate at each constant V, g...... By changing V. Curve showing the relationship between θ and S when changing h...Curve showing the relationship between θ and V when changing V, k...V and P
A curve showing the relationship between θ and v when changing l...
Curve showing the relationship between θ and P when changing ... and P, m... θ when changing V and P
A curve showing the relationship between and S.

Claims (1)

[Claims] 1. When interlacing the yarn using a fluid treatment nozzle and winding it onto a bobbin while twisting, the bobbin rotation speed is gradually changed from the start of winding to the elapsed winding time, and the yarn is twisted along the length direction. The yarn is wound so that the shrinkage rate is substantially constant, and the fluid pressure and/or fluid treatment speed of the fluid treatment nozzle is gradually changed so that the degree of interlacing is substantially constant along the length of the yarn. A method for winding a synthetic fiber yarn, the method comprising: winding a synthetic fiber yarn at a constant value.