JPS609931A - Partial bulky processed 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 The present invention relates to a partially bulky textured yarn made of a multifilament yarn subjected to a fluid jet disturbance treatment, and more specifically, the present invention relates to a partially bulky textured yarn made of a multifilament yarn subjected to a fluid jet disturbance treatment. The present invention relates to a partially bulky textured yarn in which a bulky portion having a bulky portion or a non-bulky portion near the bulky portion where entanglement is relatively reduced is bundled by twisting.

Conventionally, as one of the slab yarns in which bulky parts are formed partially in the longitudinal direction using filament yarns, 'P & turbulent fluid injection device W (hereinafter referred to as jet nozzle)' is used as a part that utilizes the void percentage disturbance effect. There is a bulky yarn, but the form of this partially bulky yarn is formed by the disturbance effect of the diagonal nozzle, and the loops, tangles, or slack are simply bulky, and when it is made into a woven or knitted fabric. There are loops and other fluff protruding from the surface,
When formed into a relatively large shape, it was evaluated as a defect as an untidy fluff protruding on the surface of a woven or knitted fabric rather than as a slub yarn. In addition, in the non-bulky part, in the part near the bulky part, since the amount of yarn supplied to the bulky part is large, the amount of yarn supplied is small, and as a result, entanglement is reduced and sag increases.

When woven or knitted, it appears streaky, and the surface of the fabric is disturbed (and the bulky parts are obscured.

This is due to protruding fluff in bulky areas and sagging in non-bulky areas.

The threads were difficult to handle, as problems such as thread unraveling during weaving and warp shedding during weaving occurred, and depending on the degree of fuzz and sagging, some threads were even impossible to handle. For this reason, additional twisting may be considered as a means of improving handleability, but if the bulky portion is large, it may be impossible to unwind the yarn at all.

Therefore, when the cheese is once rolled up and the additional twisting process is performed as a separate process, the shape of the bulky part is limited to a relatively small one. Furthermore, if the air agitation treatment and the additional twisting process are made into a series of processing steps, there is a drawback that the spindle rotation speed in the additional twisting process is limited, and the high-speed processability characteristic of the air agitation treatment method is diminished. Ta.

The present invention solves such conventional drawbacks, and provides a partially bulky yarn that facilitates yarn handling during W4 weaving, and that can significantly exhibit a thick and thin effect in which bulky parts can be clearly observed when made into a woven or knitted fabric. In order to achieve this purpose, the present invention has the following configuration.

In other words, the present invention is a yarn in which a multifilament yarn is subjected to fluid injection disturbance treatment by intermittently changing its supply amount, and has a bulky portion partially in the longitudinal direction of the yarn, so that the entire yarn is The gist of the yarn is a partially bulky processed yarn which is bundled with alternating twists and whose strength and original state changes with the bulky portion as a boundary.

Hereinafter, one aspect of the present invention will be explained in detail.

The partially bulky textured yarn of the present invention has a form as illustrated in the schematic side view of FIG. 1 or 2. First, the yarn in FIG. 1 is composed of a bulky part (S) and a non-bulky part (Y), and the bulky part (S+).

(Sa), ---, and the non-bulky part near the bulky part (Y
l) (Y2) , -・-, (Y'+), -, (Y't
), - are both focused by lran. Bulky parts (S+), (Sa), -, and non-bulky parts (Y+).

(Y2), -, are focused by twisting in the same direction, and the non-bulky parts (Y'+), (Y'a), -, are the above-mentioned bulky parts (S+), (Sa), -, and non-bulky parts. Bulky part (Y
+), (Y2), -, are twisted in the opposite direction. In addition, in each case, the twist density is highest in the bulky part and its vicinity, and the twist density is the lowest near the center of the non-bulky part. Also, bulky part (S+).

(S2) , ---, non-bulky part (Y'+), (Y'
2).

At the -2 boundary, the direction suddenly changes while the twist density remains high.

Moreover, the yarn in FIG. 2 is composed of a bulky part (S) and a non-bulky part (Y), and the bulky part (S+).

(32) , −−, and the non-bulky part near the bulky part (Y+
).

(Ya), --, (Y'+), (Y'a
), --, are all focused by twisting. and non-bulky parts (Y+), (Y'+) and bulky parts (Sl)
are focused by twisting in the same direction, but (Y'+) and (Sl
) The twist density changes greatly at the boundary. Also, non-bulky part (Y2) 1. (Y'*) and the bulky part (S2) are twisted in the same direction.

The twist density changes greatly at the boundary between (Y2) and (S2). Furthermore, although (S+), (Y'+) and (S ri (Y2)) have different twist directions, the change in twist may occur while the twist density is still high; It may also occur in lower parts.

In the processed yarn of the present invention, the bulky part and the non-bulky part near the bulky part are bundled by strong twisting, so there is little protruding fuzz that is characteristic of partially bulky processed yarn due to air agitation treatment, and it can be used for yarn windings such as cheese. The shedding of the warp threads during unwinding and weaving is improved, and the ease of handling is greatly improved. In particular, the non-bulky part near the bulky part of the partially bulky yarn obtained by the conventional air agitation process by intermittently changing the supply rate is less entangled and has more fluff, making it easier to handle the yarn. In addition, when it was made into a fabric, the part appeared streaky due to the decrease in entanglement, and the clarity of the bulky part was hindered, and it was evaluated as a defect. On the other hand, in the processed yarn of the present invention, the non-bulky portions near the bulky portions are tightly twisted, so that there is no sagging or fluff, and the portions do not look streaky.

Furthermore, an important feature of the processed yarn of the present invention is that the heating condition changes across the bulky portion.

That is, either the twist direction changes rapidly with a high twist density, or the non-bulky parts on both sides near the bulky part have twists with different twist densities. When made into a fabric, the degree of twist changes rapidly at the boundary between the bulky part and the non-bulky part, so the luster changes and the presence of the bulky part becomes noticeable, resulting in the very clear existence of a slab. It can be made into a fabric.

The partially bulky textured yarn of the present invention having such a configuration is supplied to the jet nozzle located between the two rollers while the traveling multifilament yarn is intermittently changing its yarn path, and is subjected to a fluid jet treatment.

Next, the multifilament yarn is twisted continuously or intermittently in a certain direction.

Here, the yarn path changing device that changes the yarn path intermittently changes the yarn path of the running yarn intermittently, and then instantly returns the yarn length that has become longer due to the change of the yarn path to the original yarn path. 5. The instantaneous increase in yarn length that occurs at that time is supplied to the jet nozzle, and in the jet nozzle, a bulky portion is formed by the increase in yarn length. Specifically, the yarn path changing device is one consisting of a suction device (5) and a resistance applying device (6) as shown in FIG. 3, or a yarn hooking and instantaneous cutting device ( 6′). In addition, in Fig. 4, (a)
(b) shows the state in which the thread is hooked, and (b) shows the state in which the thread is instantly cut off.

In Figure 3, multifilament yarn (1).

It is sent out to the next process by a take-up roller (4).

In this case, the yarn (1') is always running at a constant supercharging rate by the supply roller (2') and the first take-up roller (4). On the other hand, when the yarn (lf) is applied with resistance by the resistance applying device (6), slack is generated between the supply roller (2) and the resistance applying device (6), and the slack portion of the yarn is As a result of being sucked in from the inlet end AB of the negative pressure suction device (5), a yarn path ACB that remains inside the negative pressure suction device (5) is formed.Next, when the resistance of the resistance applying device (6) is released, the retained yarn The yarn is rapidly supplied, the supercharging rate increases temporarily, and a bulky portion is formed locally.

At this time, it is preferable that the supply roller (2') rotates at a slower surface speed than the supply roller (2). Switching between applying and releasing resistance of the resistance applying device (6) is operated under programming control by an automatic controller (not shown). Next, the yarn having a partially bulky portion leaving the first take-up roller (4) is twisted in a certain direction by a fluid twisting device (7) continuously or intermittently as necessary. , and is taken up by a second take-up roller (8) and wound up by a winding device (not shown). Incidentally, the intermittent yarn turning of the twisting device (7) is also programmed and controlled by the automatic controller, and this control signal synchronizes the yarn with the switching of the resistance applying device (6) between resistance imparting and resistance release. I can do it.

In the illustrated example above, a partially bulky textured yarn is obtained from two multifilament yarns (11, (1')), but a partially bulky textured yarn is formed from one multifilament yarn (1). I can do things.

Through the above steps, it is possible to obtain the partially bulky textured yarn of the present invention, which has twists with different directions or twist densities in the non-bulky portions on both sides of the bulky portion.

The processed yarn of the present invention obtained by the above method is as follows.

Despite being formed by fluid disturbance processing.

It is a partially bulky textured yarn with almost no protruding fuzz and is bundled by twisting.The reason why such a textured yarn is obtained is thought to be as follows. That is, if a bulky portion is locally formed in the longitudinal direction of the yarn, and the yarn having the locally bulky portion is turned continuously or intermittently in a certain direction using a fluid twisting device, heating and decomposition due to 5 false twists can be achieved. A transient phenomenon occurs due to the imbalance of twist offset in the amount of twist, resulting in alternating twist remaining in the yarn, and furthermore, the amount of yarn turning in the bulky area and the non-bulky area changes instantaneously. That is, the number of times heated between the first take-up roller and the fluid twisting device.

Either downstream of the fluid twisting device, that is, secondary to the fluid twisting device, or the twist density changes. In addition, in the above, when a bulky part with an extremely large change in yarn diameter is formed using a yarn path changing device, the turning of the yarn will fluctuate even if it is turned continuously in a fixed direction by a fluid twisting device. As a result, the partially bulky textured yarn of the present invention is formed. When twisting the twisting device continuously in a certain direction, the first
As shown in the figure, when the twisting direction changes at the bulky part as a boundary and the yarn is turned intermittently, the twisting density mainly changes as shown in FIG. 2.

As mentioned above, the processed yarn of the present invention skillfully combines the characteristics of partial yarn diameter change, fluid twisting, and the transient phenomenon of yarn twisting and yarn untwisting, and creates alternating actual twists in the yarn. By adding this, the above-mentioned drawbacks peculiar to partially bulky yarns due to air agitation treatment were solved. It is a partially bulked yarn with a clear bulky part.

When thermoplastic synthetic fibers are used as the multifilament yarn for producing the partially bulked yarn of the present invention, a heater may be provided upstream of the fluid twisting device and the heated region may be heat-fixed. In this case, in addition to the above-mentioned yarn convergence effect, the formed loops are contracted due to the thermal shrinkage ability of the thermoplastic synthetic fiber filament due to heating, resulting in an even tighter yarn configuration. In addition, when a heater is provided, the obtained partially bulky processed yarn has strong torque.

A tension or relaxation heat treatment may be subsequently performed for the purpose of reducing torque.

In the present invention, the non-bulky part near the bulky part refers to the areas on both sides of the bulky part, each having a length of at least twice the length of the bulky part, and the high-density stroking is based on the twist coefficient (per meter). The number of twists multiplied by the square root of the fineness) can reach 8,000 or more.

In addition, the partially bulky textured yarn of the present invention has alternating twists as a whole, and the twist direction or twist density always changes greatly with the bulky part as a boundary. However, that part is not recognized as a changed area and does not interfere with the clarity of the bulky part in any way.

As described above, in the partially bulky textured yarn of the present invention, the bulky part and the non-bulky part near the bulky part are bundled by strong twist, and the high-density twist suddenly changes direction or twist density at the boundary between the bulky part and the non-bulky part. Because of this, the existence of the bulky parts can be clearly seen on the fabric, and the fluff that stands out due to the
Because the slack is tightly gathered, yarn handling is extremely good.

The present invention will be specifically explained below using examples.

Example According to the manufacturing process shown in FIG. 3, a non-contact type heater was provided upstream of the twisting device (7), and a partially bulky textured yarn was manufactured under the conditions listed in Table 1. The resistance imparting device uses a yarn tenser to repeatedly apply and release resistance and to control the time interval of opening and closing of a solenoid valve for supplying fluid to the fluid twisting device, thereby creating bulky parts at predetermined length intervals in the longitudinal direction. I let it happen. The fluid twisting device used is positioned such that one fluid conduit is oriented substantially in a tangential direction relative to the inner circumferential surface of the cough thread passage so as to regulate the flow of fluid within the two cylindrical thread passages. It was established in The form of the partially bulky textured yarn obtained is as shown in Figure 3, and the length of the bulky part is 4 cm to 8 cm.

The maximum thickness was 51. Bulky part (S+).

The number of twists of (Sl)-・ is 400 T/M, and the non-bulky part (Y
l)(Yl),...- has a twist number of 550 T/M,
Non-bulky part (Y'l), (Number of twists in Y'ri is 150T/M
It had Also, thread handling is very easy.

When fabricated, bulky parts were observed very clearly.

Table 1

[Brief explanation of the drawing]

Figures 1 and 2 are schematic side views showing an example of the partially bulky textured yarn of the present invention, Figure 3 is a schematic diagram of the process for producing the partially bulky textured yarn of the present invention, and Figure 4 is a yarn path change. It is a schematic diagram showing an example of a device. In the figure, (S) is a bulky part, (Y) is a non-bulky part, (Yl>, (¥2)-2 and (Y'+), (Y'
t)-, is a non-bulky part near the bulky part. Patent applicant Unitika Co., Ltd.

Claims (1)

[Claims] (1) Multifilament yarn is subjected to fluid jet disturbance treatment by intermittently changing the supply amount, and has a partially bulky part in the longitudinal direction of the yarn, and the entire yarn is alternately twisted. It is focused at. A partially bulky textured yarn characterized in that the heating state of the yarn changes with the bulky portion as a boundary.