JP3227516B2 - Yarn surface treatment method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn surface treatment method, and more particularly, to a surface treatment method such as fluffing or smoothing of the yarn surface.

[0002]

2. Description of the Related Art Conventionally, in the case of cotton yarn, silk spun yarn, wool yarn, and the like, fluff is produced on the surface of the yarn. Therefore, the fluff is removed by baking with a gas, electric heat, or the like, and the yarn is polished.
In addition, a process of rubbing the surface of the yarn, peeling the skin, eliminating fibrils, and removing fluff is also performed.

[0003]

However, in the above-mentioned conventional method, an enormous installation space is required as a hair-burning machine, and the effect on the yarn quality is inevitable due to the burning of the fuzz on the yarn surface. Not only that, even if the skin is peeled off or the fluff is removed by friction, the processing speed of the yarn is limited and there is a problem in efficiency.

Therefore, the present inventor has paid attention to the above-mentioned actual situation, and has previously found a surface treatment of a fibrous structure by a pressurized air flow, and has proposed to utilize the same. (Japanese Patent Application 9-1
No. 3073) The use of a pressurized air flow is widely used in various fields such as drawing and entanglement of synthetic fiber yarn, air spinning, false twisting, etc., and air utilization means adapted to the purpose is adopted. However, it has not yet been applied to the surface treatment of a fibrous structure.

[0005] On the other hand, there is a processing method in which an abrasive is slurried as a blast finish, and a glossy surface is produced by pressure-feeding and injecting from a pump. However, these methods use a high-pressure compressor to consume a large amount of power. However, the cost is high, and when this is applied to the fiber surface treatment, the fiber surface is rather damaged, which is not suitable.

The present invention addresses the above situation, further develops a surface treatment using a pressurized air flow, and utilizes a swirling flow of a pressurized air containing an abrasive to provide a highly efficient and highly efficient yarn surface. It is intended to achieve surface treatments such as removal of fluff, smoothing, and removal of fibrils.

[0007]

That is, a feature of the present invention that meets the above-mentioned object is that a pressurized air containing an abrasive is introduced into a processing region and a swirling flow of the compressed air is introduced into the region from one end. This is a method of treating the yarn surface by causing the yarn to pass through the swirling flow of the pressurized air and causing the swirling flow to come into contact with the yarn surface while being generated toward the other end side.

In this case, it is desirable to connect a suction device to the yarn outlet end side of the processing area, to maintain the inside of the processing area at a low pressure, and to suction and collect compressed air containing abrasive at the processing area outlet side.

In the treatment, it is preferable to adjust the pressure of the abrasive-containing pressure air, the traveling speed of the yarn, and the like.
Advantageously, the flow rate of the compressed air is at least ten times the yarn speed possible. Here, a known polishing agent can be used as the polishing agent, but it is more effective to use ceramic powder such as steel, aluminum, alumina, silicon nitride, silicon carbide, and glass.

[0010]

According to the method of the present invention, when a yarn is inserted into a treatment area and pressurized air containing an abrasive is brought into contact with or around the surface of the yarn by a swirling flow, the fluff clumping on the surface of the yarn due to the swirling flow. Those that are lying down are also raised and come into contact with the pressurized air containing the abrasive to remove fluff, smoothen, and remove fibrils, thereby improving the surface texture. In particular, the contact of the abrasive-containing pressurized air swirling flow to the yarn surface, depending on the pressure, the number of revolutions becomes extremely large, and various situations can be obtained in the manner of contact with the yarn surface. In addition, the efficiency of the surface treatment is greatly improved, and the area of the installation space is significantly reduced. Moreover, since such high-efficiency processing is possible, the use of constant-pressure air such as a blower becomes possible by selecting the running speed of the yarn, the air pressure, and the flow velocity.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the method of the present invention will be described with reference to an embodiment shown in the accompanying drawings.

FIG. 1 shows an example of a main part of a processing apparatus for carrying out the method according to the present invention, wherein 1 is an apparatus main body, 2 is a processing area, and the processing area 2 is connected to an inlet 3 on one end side. A yarn Y to be subjected to surface treatment is inserted through substantially the center toward the end side outlet 4, and the outer periphery at one end side is formed at an angle to the traveling direction of the yarn Y. And an inlet 5 for introducing eccentrically pressurized air containing an abrasive so as to generate a swirling flow in the processing region 2 from one end to the other end.
Is connected to the other end, and a suction mechanism for suctioning and collecting the introduced pressure air containing the abrasive is connected to maintain the inside of the processing area 2 at a slightly lower pressure, and the pressure containing the abrasive The air is being collected.

In the above apparatus, it is effective that the pressure air inlet 5 is arranged so that the swirling flow of the pressure air flows in the processing area 2 in the same direction as the yarn advancing method. Although the eccentricity is provided toward the center from the side in the yarn advancing direction, the eccentric introduction is performed at an angle close to 90 °, preferably as close as possible to the yarn advancing direction. I do.

By the way, in the present invention, it is advantageous to make contact between the swirling flow and the yarn surface as much as possible. The traveling speed and the swirling flow speed of the pressurized air differ depending on the length of the processing region 2 as appropriate. For example, when the traveling speed of the yarn is low, it is not necessary that the flow speed of the compressed air is too high. However, when the traveling speed of the yarn is increased, it is advantageous to increase the flow speed of the compressed air.

The member forming the processing region 2 is preferably made of an abrasion-resistant material because it comes into contact with pressurized air containing an abrasive, and for example, titanium oxide and diamond are suitable. As described above, the processing region 2 is provided with a suction mechanism connected to an intake source (not shown) at the outlet side end as described above to form the pressure release space 6 and to suction the abrasive-containing pressure air. To separate and collect the abrasive from the suction passage 7,
Care is taken so that it can be reused.

As described above, the abrasive may be a known abrasive, but may be steel, aluminum, alumina, silicon nitride,
Ceramic powder such as silicon carbide is preferably used, and it is economically advantageous to collect and reuse it.

Thus, the treatment of the yarn surface is performed by generating a swirling flow around the inserted yarn Y and bringing it into contact with the yarn surface. At this time, the yarn speed, the pressure of the pressurized air,
The flow velocities have a correlation with each other, and the flow velocity of the pressurized air is a flow in the same direction as the yarn speed and is a high speed.
The flow velocity of the compressed air is at least 10 times, preferably 1
It is preferable to make it 0 to 40 times. However, the yarn speed and the pressure or the flow rate of the pressure air flow are not necessarily constant, and should be appropriately changed and adjusted depending on the type of yarn, surface treatment efficiency and treatment effect. Is preferred.

Next, an example of an experiment using the method of the present invention will be described. Pressure air containing abrasive such as ceramic powder is introduced with 7 kg pressure air, and 200,000 times /
Minute rotation was given. Therefore, the yarn speed is 400m here
Per minute, the yarn runs 500 times per meter, ie 1 cm
The surface treatment was performed by about 5 rotations per revolution, and surprising fuzz on the yarn surface was obtained in a very short section of the treated area. This is because the flow velocity of the compressed air is larger than the yarn speed, so the fluff on the yarn surface is first raised,
It is considered that this is caused by the contact and cutting by the rotating vortex having a large flow velocity.

In this experiment, the method of the present invention is sufficient even if compressed air is sent using a low-pressure commercial blower.
It has been found that a good surface can be obtained. This increases the amount of air sent in by using a low pressure blower,
It is likely that the contact between the yarn and the abrasive increases. fact,
Using a blower, 1000 m / min to 30 m in the processing area
Not as fast as 00m / min, but moderate, eg 6m
/ S at about 60-70 m / s
Good results were obtained even when the surface treatment was performed at a speed of 100 m / sec for seconds, at most.

Thus, when the surface treatment is performed by the contact between the swirling flow of the pressurized air containing the abrasive and the yarn in the processing region 2 as described above, the pressure air and the yarn are treated in the processing region 2.
At the exit, the yarn reaches the pressure release space 6, where the yarn is advanced to the next step via the yarn outlet 4, while the compressed air containing the abrasive is collected from the outlet through the suction passage 7,
Although not shown, the abrasive is appropriately collected.

In the above-mentioned surface treatment, ceramic powder is usually used as the abrasive, but known abrasives can of course be used. Further, the surface-treated yarn is not limited to cotton yarn, silk yarn and the like, and can be applied widely to filaments such as rayon, modified rayon, polynosic, and various synthetic fibers or spun yarns.

[0022]

As described above, the present invention utilizes compressed air, introduces compressed air containing abrasives into the processing area,
This is a method of bringing the surface of the yarn into contact with the surface of the yarn as a swirling flow.
The surface of the yarn surface is shaved, the fluff is cut off and removed, and the hard surface of the surface is also peeled off.Through the various treatments on the surface, the swirl of compressed air is applied to the surface of the yarn. Due to the pressure of the air applied, the rotation can reach as much as one million revolutions / minute as seen in a false twist spindle, which, in combination with the high speed, promotes the miniaturization of the processing equipment, and in this way, Considering that a high rotation is not required, low pressure air such as a blower can be used to blow out a large amount of air, and a large amount of abrasive can be brought into contact, eliminating the need for a mechanism such as a high pressure blast. This has the remarkable effect of greatly reducing the cost, significantly reducing the installation space for the apparatus, and achieving a significant improvement in the processing efficiency. The method of the present invention can be used for surface treatment of yarn over a wide range by appropriately changing and adjusting the pressure, the flow rate, and the yarn speed, which is extremely advantageous.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an internal structure of a main part of a processing apparatus used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Processing main body 2 Processing area 3 One end side inlet 4 The other end side outlet 5 Pressure air introduction port 6 Pressure release space 7 Suction passage

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) D02J 3/02 D06C 29/00 D02G 1/16 D02C 11/00

Claims (4)

(57) [Claims] 1. A pressurized air containing an abrasive is introduced into a processing area to generate a swirling flow of the pressurized air from one end side to the other end side in the processing area. A method of treating the surface of a yarn, characterized in that the surface of the yarn is treated by passing the swirling flow into contact with the surface of the yarn. 2. The surface treatment of a yarn according to claim 1, wherein a suction device is connected to the yarn outlet end of the processing region to maintain the inside of the processing region under a low pressure, and to suck and recover an air flow containing an abrasive. Method. 3. The yarn surface treatment method according to claim 1, wherein the flow rate of the compressed air containing the abrasive is set to be 10 times or more faster than the yarn traveling speed. 4. The method according to claim 1, wherein the abrasive is a ceramic powder.