JPS602739A - Stretching apparatus of synthetic fiber bundle - 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 drawing device for one synthetic fiber bundle,
In particular, the present invention relates to an extremely excellent stretching device that can uniformly orient synthetic fiber bundles having a fineness of several thousand to several million deniers without the trouble of winding or cutting them with rollers, while maintaining a stable stretching condition.

Conventionally, nine synthetic fiber bundle stretching devices include a heating gas bath or a heating gas bath between a supply roller group and a stretching roller group.

Stretching devices that provide heated liquid temperature are known.

However, when using a device equipped with a heated gas bath, it becomes difficult to uniformly supply heat to each single fiber as the synthetic fiber bundle becomes thicker. Heated gas flows.

This has the drawback of causing problems such as fluctuations in the starting point of the heater, which significantly reduces product quality.

Further, in the case of a device provided with a heated liquid temperature, it is necessary to provide a space for overflow of the heated liquid between the final supply roller and the heated liquid temperature, and therefore the two synthetic fiber bundles cannot be brought very close to the supply roller.

When the stretching ratio is increased, the stretching point moves to the supply roller side,
The disadvantage is that you will be out of the bath. If the drawing point is outside the bath, the drawing condition becomes unstable, leading to breakage of the drawn yarn and mixing of undrawn yarn, making it impossible to increase the drawing ratio and making it impossible to obtain a high-quality product.

Furthermore, in order to prevent yarn breakage and the mixing of undrawn yarn and to increase the draw ratio, attempts were made to immerse the supply roller itself in a heated liquid bath so that the drawing point was present in the bath, but the draw ratio was too low. If the temperature rises too high, the drawing point will come out from the bath surface on the roller and move to the supply roller in front, making the drawing condition unstable.

The present invention eliminates the drawbacks of the above-mentioned prior art and improves the stretching condition.
The object of the present invention is to provide a synthetic fiber bundle stretching device that can achieve high-magnification and high-speed stretching.

That is, in the present invention, a heated liquid is applied between a group of supply rollers and a group of drawn loaves, and the heated liquid is ejected toward the part of the nine synthetic fiber bundles that separates from being drawn.

The object of the present invention is to provide a synthetic fiber bundle drawing apparatus characterized in that a concave bath is provided in which the synthetic fiber bundle is temporarily immersed in the ejected heated liquid.

The apparatus of the present invention will be explained in detail below based on two drawings.

FIG. 1 is a side view of a device according to the present invention, and FIG. 2 is an enlarged perspective view of only a part of the device in FIG.

FIGS. 6 and 4 are perspective views of examples of its application.

The synthetic fiber bundle 1 is stretched between the supply roller groups 2 to 6 and the stretching roller groups 7 to 11, which rotate at higher peripheral speeds, according to the peripheral speed ratio. 12 is a heated liquid jetting nozzle, 13
is a concave immersion bath. The heating liquid is ejected from the ejection nozzle 12 and temporarily immerses the synthetic fiber bundle 1 by the supply row 13.

It flows out both in the direction of the supply roller 6 and in the direction of the stretching roller 7. The heated liquid flowing out in the direction of the supply loaf 6 is
The dipping bath 16 is provided as close as possible to the direction of the supply loaf 6 so that the synthetic fiber bundle directly below the supply loaf 6 is immersed.

As shown in FIG. 2, the jet nozzle is divided into a plurality of small holes 14 so as to uniformly jet the heated liquid onto the synthetic fiber bundle 1. As shown in FIG. 6, a plurality of heated liquid jets 16 are provided on the bottom of the immersion bath 13 attached to the jet nozzle.
If the heated liquid is ejected from the upper and lower surfaces of the synthetic fiber bundle 1 from 3, the heating liquid will be applied to the synthetic fiber bundle 1 more evenly.
I can do it.

The length of the immersion bath 15 is within the range of 10 to 200G.

/L/12. After the ejection nozzle 16 in the immersion bath 15 is recovered by a recovery bath 17 provided at the synthetic edge and a nip roller 18 for squeezing the heated liquid, the insufficient liquid is replenished and heated to a predetermined temperature. This is advantageous because it has an energy saving effect because of the circulation equipment that circulates the water so that it is ejected from the ejection nozzle 12 again.

As the heating liquid, it is possible to use hot water at 60 to 100°C, or a solution of an antistatic agent or an oil agent used for the purpose of improving chopping properties, improving smoothness, etc.

The drawing apparatus of the present invention is extremely useful for drawing synthetic fiber bundles such as polyester, polyamide, polyacrylonitrile, and polyolefin.

By using the drawing device of the present invention, it is possible to draw a high-denier synthetic fiber bundle, and even when the drawing speed is increased, there is no need for roller winding.
There is no problem with yarn breakage, the rolling process is good, and a dense, high-quality product with a highly oriented fiber structure can be obtained.

The present invention will be explained in more detail with reference to Examples below.

Example Intrinsic viscosity (measured at 25°C using a mixed solvent of equal weight of phenol/L/tetrachloroethane) or 0.65 was drawn using the stretching apparatus shown in Figure 1 as shown in Table 1. .

The stretching speed was varied and the stretching ratio was set to 5.2 times. Warm water was used as the heating liquid.

The heating bath used was one having the shape shown in Fig. 4.

The temperature of the heating liquid is 80°C, and the length of the immersion bath 13 is 50°C.
It was set as m. The flow rate of the heated liquid jetted from the spout nozzle v12 was set to 301/min, and the flow rate of the jet nozzle 16 of the dipping bath 13 was set to 2011/min.

Table 1 shows the quality of the drawn yarn obtained by drawing and the drawing condition (thread breakage, presence or absence of roller winding).

The single yarn fineness of the drawn yarn on the first table is 1.5 d, and the strength is 6.0 to 6.1.
The target elongation was 9/d and 30.2 to 31.8%, and there was no yarn breakage or winding during stretching (extremely excellent results).

[Brief explanation of the drawing]

FIG. 1 is a side view of a stretching device of the present invention, FIG. 2 is an enlarged perspective view of the main part of FIG. 1, and FIGS. 6 and 4 are perspective views of examples of its application. 1... Synthetic fiber bundle, 2-6... Supply roller. 7-11... Stretching roller, 12... Heated liquid ejection non-null. 13... Immersion bath, 14... Small hole, 15... Board, 1
6... Ejection nozzle, 17... Recovery tower, 18... Nip roller. Patent applicant: Japan Ester Co., Ltd. and agent: Yuzo Kodama

Claims (2)

[Claims] (1) In a device that applies a heated liquid between a supply roller group and a stretching roller group to stretch one synthetic fiber bundle, nine synthetic fiber bundles are drawn from above the last roller of the supply roller group, and nine synthetic fiber bundles are drawn by the final roller. Stretching of a synthetic fiber bundle, characterized in that a concave bath is provided in which a heated liquid is jetted toward a part where the bundle is separated from the synthetic fiber bundle, and the synthetic fiber bundle is temporarily immersed in the jetted heated liquid. Device. (2) The synthetic fiber bundle stretching apparatus according to claim 1, wherein the heated liquid is jetted from the bottom of the concave bath.