JPH076271U - Core liquid treatment equipment for spinnerets for hollow fibers - Google Patents

Abstract

(57) [Summary] [Object] To provide a means for easily separating air bubbles contained or generated in the core liquid during the production of hollow fibers. In a hollow fiber spinneret having a multi-tubular structure, a core liquid introducing pipe 16 is provided which is connected to a pump 17 and supplies a fixed amount of core liquid into a central pipe 21 of the spinneret. Is divided into two directions, and the branched one is connected to the gas separation device 10 having the breaker opening / closing valve 22 on the upper part of the core liquid container 11 via the first opening / closing valve 24, and the core is The core liquid introducing pipe 16 and the spinneret 20 are provided on the other branched side of the liquid introducing pipe 16 via a second opening / closing valve 26.
It is characterized by connecting and.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a spinneret for hollow fibers, and more particularly to an apparatus for treating a core liquid supplied to a spinneret having a multi-tube structure.

[0002]

[Prior art]

 It is well known in the art to use a multi-tube structure preventing spinneret and to introduce the core liquid into the central tube of the spinneret and to introduce the spinning dope into the coaxial annular part surrounding the central tube when manufacturing the hollow fiber. Has been done. FIG. 2 shows a conventional spinneret for hollow fibers of this type.

As can be seen from FIG. 2, when the hollow fiber is manufactured, the spinning dope 18 is appropriately introduced from a spinning dope introducing pipe 19 via a metering pump 17 etc., and the core liquid 12 is fed with a metering pump 15 etc. It is introduced from the core liquid introducing pipe 16 via the. In this case, bubbles 14 contained in the core liquid 12 or generated in the core liquid 12 when the spinneret 20 is heated by the band heater 30 or the like (especially when the core liquid that is easily vaporized is generated) are generated. It accumulates in the introduction tube 16 and the central tube 21 of the spinneret, which hinders and destabilizes the supply of core liquid. As a result, the hollow fibers obtained by this type of conventional spinneret 20 often cause dimensional changes over time (tapering) and even thread breakage in extreme cases.

[0004]

[Problems to be solved by the device]

 The present invention aims to eliminate the above-mentioned drawbacks associated with the conventional spinneret for producing hollow fibers, that is, to provide means for easily separating air bubbles contained or generated in the core liquid. is there.

[0005]

[Means for Solving the Problems]

 According to the present invention, a problem with the above-mentioned conventional technique is that, in a hollow fiber spinneret having a multi-tubular structure, a core liquid introducing tube for quantitatively supplying the core liquid into the central tube of the spinneret by a pump action. Is provided, the tip of the core liquid introducing pipe is branched in two directions, the first opening / closing valve is connected to the branched one, and the core liquid is introduced to the core liquid introducing pipe through the first opening / closing valve. A gas separation device for removing air bubbles therein is connected and arranged, and the gas separation device includes a core liquid container and a third opening / closing valve for a breaker for releasing the atmosphere to the upper part of the container, Further, a second opening / closing valve is provided on the other branched side of the core liquid introducing pipe, and the core liquid introducing pipe and the spinneret are connected via the second opening / closing valve. .

When hollow fibers are continuously spun for a long period of time, two or more gas separation devices connected to the core liquid introducing pipe are arranged in parallel and alternately used, whereby endless spinning is performed. This is convenient because it is possible.

[0007]

[Action]

 According to the present invention, the tip of the core liquid introducing pipe is branched into two directions, and a gas for removing air bubbles in the core liquid from the core liquid introducing pipe is branched to one of the branched ones via the first opening / closing valve. Since the separation device is connected and arranged, air bubbles contained in the core liquid or generated in the core liquid are transferred to the gas separation device and easily removed.

[0008]

【Example】

 Hereinafter, the present invention will be further described with reference to the attached FIG.

In FIG. 1, the same components as those in FIG. 2 are designated by the same reference numerals and have the same functions, and the reference numeral 28 is a sealing O-ring.

The present invention shown in FIG. 1 is different from the prior art shown in FIG. 2 in that the tip of the core liquid introducing pipe 16 is branched, and the gas separation device 10 is provided at one of the branched ends. The gas-liquid separating apparatus 10 includes a core liquid container 11 for storing the core liquid 12, a first opening / closing valve 24 provided at a connecting portion between the container and the core liquid introducing pipe 16, and the container. And a third opening / closing valve 22 for a breaker for releasing the upper part of the atmosphere to the atmosphere. Reference numeral 26 is a second opening / closing valve for supplying / shutting off the core liquid to / from the spinneret. Of course, these on-off valves 22, 24, 26 may be either manual valves or controllable solenoid valves.

Although not shown, two or more gas separation devices 10 having the above-mentioned configuration can be provided in parallel. In that case, for example, the valve 24 may be a manifold valve, or a manifold and It can also consist of a series of valves.

Hereinafter, the operation of the device according to the present invention will be described with reference to FIG.

First, the valve 26 is closed and the valves 22 and 24 are opened. In this state, the container 11 of the gas separation device 10 is filled with the core liquid by the metering pump 15 such as a gear pump through the core liquid introducing pipe 16. The filling amount of the core liquid may vary depending on the duration of the spinning operation.

Then, the supply of the core liquid is stopped, the valve 22 is closed, and the valve 26 is opened. Thus, the core liquid 12 in the container flows down into the spinneret 20, and the gas layer in the upper part of the container acts as a negative pressure to prevent the core liquid 12 from flowing down. 12 flows down automatically.

After reaching this state, the band heater 30 is turned on and the metering pumps 17 and 15 such as gear pumps supply the spinning dope 18 and the core liquid 12 from the respective introducing pipes 19 and 16, respectively. , Start hollow fiber spinning. During the work, the bubbles 14 contained in the core liquid or the bubbles 14 generated in the core liquid in the mouthpiece 20 due to heating by the band heater 30 or the like are transferred to the gas separation device 10 and transferred to the core liquid. Separation easier than inside. Moreover, when the air bubbles 14 reach the gas layer in the upper part of the core liquid container 11, the negative pressure generated by the gas layer in the upper part of the container is weakened by the absorption of the air bubbles. As a result, an amount of core liquid 12 commensurate with the volume of bubbles is replenished by flowing down from the gas separation device 10.

[0016]

[Effect of device]

 As can be seen from the above description, according to the present invention, it is possible to easily and effectively separate air bubbles from the core liquid with a simple structure, the resulting dimensional change of the hollow fiber is eliminated, and the spinning Local defects due to air bubbles being discharged from the core liquid side are prevented, and the risk of thread breakage or thread breakage is prevented, and high-quality hollow fibers can be stably spun. Become.

Furthermore, by using two or more gas separation devices in parallel, it becomes possible to continuously and stably spin high-quality hollow fibers for a long period of time.

[Brief description of drawings]

FIG. 1 is a schematic cross-sectional view of a core liquid treating apparatus including a spinneret for hollow fibers and a gas separating apparatus thereof according to the present invention.

FIG. 2 is a schematic sectional view of a conventional spinneret of this type.

[Explanation of symbols]

 10 Gas Separation Device 11 Core Liquid Container 12 Core Liquid 14 Bubbles 15 Core Liquid Supply Metering Pump 16 Core Liquid Introducing Tube 17 Spinning Liquid Solution Supplying Constant Pump 18 Spinning Liquid Solution 19 Spinning Liquid Solution Introducing Tube 20 Spinneret 21 Central Tube of Spinneret 22 3rd opening / closing valve 24 1st opening / closing valve 26 2nd opening / closing valve 28 O-ring 30 band heater

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Yukio Kasuga Inventor, Yukio Kasuga 3-43-2, Ebisu, Shibuya-ku, Tokyo Nikkiso Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. In a spinneret for hollow fibers having a multi-tube structure, a core liquid introducing pipe (16) for quantitatively supplying a core liquid into a central pipe (21) of a spinneret (20) by a pump (15) action. ) Is provided, the tip of the core liquid introducing pipe (16) is branched in two directions, and a first opening / closing valve (24) is connected to the branched one, and the first opening / closing valve (24) is used. A gas separating device (10) for removing bubbles in the core liquid is connected to the core liquid introducing pipe (16), and the gas separating device (10) includes a core liquid container (11) and A third opening / closing valve (22) for a breaker for releasing to the atmosphere is provided on the upper part of the container, and a second opening / closing valve (26) is provided on the other branched side of the core liquid introducing pipe (16). The core liquid introducing pipe (16) and the spinneret (20) are connected via a second on-off valve (26). A core liquid processing device for a spinneret for hollow fibers, characterized in that 2. The utility model registration claim characterized in that the gas separation device (10) connected to the core liquid introducing pipe (16) is formed by arranging two or more gas separation devices in parallel. The core liquid treatment apparatus according to item 1.