JPS60146006A - Collection of yarn - Google Patents

Abstract

PURPOSE:To wind and to store even yarn such as pitch yarn, etc. lacking in flexibility, having low strength without causing end breakage and breaking, by passing yarn made by melt spinning through a misty fiber-collecting agent to collect the yarn without bringing directly the yarn into contact with a jet flow of the fiber-collecting agent. CONSTITUTION:A fiber-forming raw material of bituminous substance such as petroleum pitch, coal pitch, etc. is spun from the melt spinning machine 8 into the yarn 7. The yarn 7 is passed through the spray box 5 filled with the misty fiber-collecting agent 12 which is formed by jetting the fiber-collecting agent 14 from the jet nozzle 10 by the air flow 13, so that the yarn 7 is provided with the fiber-collecting agent. Further, the yarn is brought in a half contact way into contact with the metering feed guide 2 for fiber-collecting agent from which the fiber-collecting agent 4 is quantitatively fed by the metering pump 3, the yarn is quantitatively supplied with the fiber-collecting agent, and then wound by the winder 1, and stored.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preventing melting of fiber-forming raw materials and applying a sizing agent to spun fibers, particularly fibers with poor flexibility and low strength.

・Generally, the spun yarn is taken to the next process in the form of a continuous multifilament by melt spinning.
In order to ensure stable take-up and storage, a method is used in which a sizing agent is appropriately applied to the multifilament in an amount of 4=J.

How to collect and store fibers spun by melt spinning
There are two methods: winding the fibers with a winder, bundling a plurality of spun yarns and taking them off with a take-up roll, or storing them in cans or using a net conveyor. There are methods such as pulling/'A, but all of them add a sizing agent to the fibers to improve the ease of collection and storage. Otherwise, the thread may become wound around the roller, resulting in poor operation, and may also become a major hindrance to forming a winding shape and unwinding the thread when it is wound up and stored by a winder. Herein lies the importance of the focusing agent.

There are three ways to apply the sizing agent: oiling roller one-way method, dip pass method, 51 volume oil guide method, and spray nozzle method. Although it is effective as a method, it is difficult to
For fibers with poor flexibility and low strength, the above-mentioned method of applying a sizing agent may cause breakage or breakage of the fibers (7), and the method of applying a sizing agent was not suitable.

In order to solve this problem, as a result of testing various methods for stably converging and pulling the fibers M, we arrived at the present invention. In a method of applying a sizing agent (=J) to spun fibers and focusing them, the spun fibers are passed through an atomized sizing agent without directly coming into contact with the jet flow of the sizing agent. A method for converging fibers, characterized by:

An example of a device according to the invention is shown in FIG. 1, by which the invention will be explained.

The fibers 7 spun from the melt spinning machine 8 pass through the spray box 5 filled with the atomized sizing agent 12 produced by injecting the sizing agent 14 from the injection nozzle 10 with the air flow 13, and are turned into fibers. A sizing agent 1 is applied, and a 21 volume pump 3 is added.
AJ passes through the sizing agent-applying kite 2 in a semi-contact manner to which a sizing agent 4 is supplied in a fixed amount, and is then wound up and stored by a winder 1.

The spray box 5 is configured to cause the sprayed sizing agent 9 to collide with the bottom of the box to atomize the sizing agent to generate atomized sizing agent, and to fill the atomized sizing agent 12 with a spray chamber 51 to create a mist through which the fibers 7 pass. It is composed of a chamber 52.

By dividing the spray box 5 into the spray chamber 51 and the spray chamber 52 in this way, the fibers do not come into direct contact with the jetting flow of the sizing agent, and the fibers are protected from the sizing agent without breaking or breaking. Then, even if the guide that dispenses the sizing agent in a semi-contact manner is touched, the yarn will not break or break.

Note that the fibers coated with a sizing agent according to the present invention may be subjected to a contact type sizing agent application method using an oiling roller or the like, but in this case, the processing of the fibers is easier than in the case of a semi-contact method. It is safer to slow down.

The concentration or filling degree of the atomized sizing agent 12 can be adjusted by adjusting the flow rate adjustment device 11 of the sizing agent 14, the pressure of the compressed air 13, and the height of the injection nozzle 10.

Furthermore, if a suction nozzle 6 is provided at the top of the spray box 5, the initially spun fibers can be automatically fed into the spray box.

Typical examples of the fiber-forming raw material 1 useful in carrying out the present invention include NYf products such as petroleum pitch and coal pitch, mixtures thereof, and processed products thereof by heating or the like.

Next, the present invention will be specifically explained using Examples and Comparative Examples.

[Example, Comparative Example J Spinning pitch for carbon fibers at a temperature of 280 to 320°C, a discharge rate of 5 g/ll1in, a fiber diameter of 10 to 15 g, and a number of fibers of 36.
Extrusion was performed under standard spinning conditions and comparative tests were conducted using various focusing methods.

(1) In the method using a metered sizing agent (water is used as the sizing agent) application guide as shown in FIG. 2, yarn breakage and breakage occurred, and the yarn could not be wound on a winder.

(2) As shown in Figure 3, simply spray water as a sizing agent onto the spun yarn (
The spraying conditions were: sizing agent amount 1 to 2 cc/min, compressed air pressure 0.5 to 1 kg/cm', and suction nozzle air pressure 0.
2 to 0.3 kg/cm'), the jet stream directly hits the fibers, causing them to break and break, making it impossible to wind them up on a winder. Also, if the compressed air for spraying is lowered to weaken the jet flow and reduce damage to the tam, (3) using the apparatus shown in FIG. The sizing agent is supplied into the injection chamber 51 at an injection air pressure of 1-2 kg/cm', while the suction air pressure is 0.2-0.3 to the suction nozzle 6.
When the fiber was suctioned at kg/cm' and wound on a winding machine, there was no breakage or breakage, and the fiber was 800 to 800.
It was possible to wind it up at a winding speed of m/min c7). In addition, storage in cans was possible without breaking or breaking the threads.

As described above, according to the present invention, even fibers with poor flexibility and low strength, such as pinch fibers immediately after spinning, can be collected and stored without causing breakage or breakage of the fibers.

[Brief Description of the Drawings] Fig. 1 is a detailed explanatory diagram of the present invention, Fig. 2 is an explanatory diagram of a method for applying a sizing agent using a conventional weighing sizing agent application guide, and Fig. 3
The figure is an explanatory diagram of a method of injecting 4X medium agent directly onto spun yarn. l- Winding machine, 2- Measuring sizing agent application guide, 3-ij l
' bj pump, 4,14- sizing agent, 5- spray box, 6- suction nozzle, 7- spun yarn, 8- spinning nozzle, 9-
Spray liquid, 10-Injection nozzle, 11-Flow meter, 12-F-shaped sizing agent, 13. 15-Compressed air, 16-Sizing agent recovery line agent Sei Kikuchi, patent attorney

Claims (1)

[Claims] In a method of melt-spinning mM#-forming raw materials and applying a sizing agent to the spun fibers to bundle them, the spun fibers are
A method for focusing m females, characterized in that the injection of the focusing agent is focused by passing through a sheath-shaped focusing agent without directly contacting the t.