JPH0657573A - Apparatus for pressurized steam treatment of yarn and treating method - Google Patents

Abstract

PURPOSE:To provide an apparatus and a process for the pressurized steam treatment enabling easy threading operation while minimizing the leak of steam and effective in preventing the disturbance of thread and the damage of fluffs and fibers caused by the leakage of steam. CONSTITUTION:Plural labyrinth nozzles having flat front and back surfaces and directing perpendicular to the running direction of thread are arranged in multiple stages in a labyrinth seal part in the running direction of thread. The ratio of the height (h) of the labyrinth nozzle to the pitch (p) of the nozzle (h/p) is 0.3-1.2 or the angle theta between the upstream-side slant side of the labyrinth nozzle viewed from the running direction of the thread and a horizontal line passing through the apex of the nozzle is 15-50 deg.. The number of stages of the labyrinth nozzles is 10-70 for the front labyrinth nozzle part as well as the rear labyrinth nozzle part. An air ejector is attached to the thread-outlet part of the rear labyrinth seal part. The filling ratio F of the thread in the labyrinth is maintained to 10-60%. The filling ratio F is defined by the formula F=(k/(9X10<5>Xrho))/A, wherein K is fineness (denier) of the thread, rho is density (g/cm<3>) of the thread and A is the channel area (cm<2>) of the nozzle.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus and a method for drawing a yarn by pressure steam, and more particularly, when the yarn is drawn by pressure steam, leakage of steam is suppressed to prevent the fiber from being leaked. The present invention relates to a pressure steam treatment device and method which can prevent damage and fluffing and can easily perform a threading operation, and which is applied to, for example, an acrylic polymer yarn producing device.

[0002]

2. Description of the Related Art One of the important uses of acrylic polymer yarns is a carbon fiber raw yarn, which requires high strength and high orientation fiber performance.

As a method for producing an acrylic polymer yarn satisfying these requirements, a solvent solution of an acrylic polymer is spun, drawn in a bath to dry and densify, and then the yarn is secondarily drawn by pressure steam. The method of doing so is widely known.

[0004] A pressurizing steam drawing device for yarns has a circular opening at the entrance and exit of the market (Japanese Patent Publication No. 25-
No. 3939, Japanese Patent Publication No. 33-1662, etc.),
It is known that the inlet and outlet of the yarn are slits and steam is supplied from the upper and lower steam generating parts to the yarn passing portion (Japanese Utility Model Publication No. 41-15532, Japanese Patent Publication No. 41-9132, etc.). There is.

However, these conventional devices are inferior in threadability of the yarn, the operability at the time of yarn breakage is not sufficient, and the steam seal structure has not been studied.
In order to provide pressurized steam to the running yarn, it is necessary to form an atmosphere system in which the steam leaks as little as possible and allow the yarn to run in the atmosphere system.

[0006]

Based on the above-mentioned conventional apparatus, a pressure steam treatment apparatus as shown in FIG. 11 can be considered. In this apparatus, the yarn a enters through the inlet of the pressure steam treatment device, passes through the labyrinth nozzle portion 54 on the inlet side, is stretched in the pressure steam treatment chamber 1, and then the labyrinth nozzle portion 6 on the outlet side. Take the exit from and go to the next process.

Pressurized steam b flows into the pressurizing chamber 3 from the steam inlet, passes through the perforated plate 4 and the pressurizing steam processing chamber 1
Leading to. Here, the yarn a is subjected to a drawing treatment and leaks to the outside through the labyrinth nozzle portions 5 and 6 at the front and rear.

At this time, the yarn a vibrates due to steam leaking to the outside, and the yarn a comes into contact with the inner wall of the labyrinth nozzle 7 to cause damage or fluffing of the yarn a. If the inner diameter of the labyrinth nozzle 7 is reduced to suppress the vibration of the yarn a,
Although steam leakage can be reduced, there is more opportunity for contact between the yarn a and the inner wall of the labyrinth nozzle. on the other hand,
When the inner diameter is increased, the vibration of the yarn a becomes extremely large due to the turbulent air flow when steam leaks, and it is difficult to secure work safety due to the leaking steam.

The threading operation is carried out manually by using the air sucker 8, but the suction efficiency is poor and the operation becomes extremely complicated in the case of a multi-threaded yarn.

As described above, the steam supplied into the pressurized steam processing chamber often leaks from the front and rear labyrinth nozzles, which disturbs the running of the yarn. The disorder of the yarn is so large that the steam leaks out so much that a part of the yarn comes into contact with the inner wall of the nozzle to damage the fiber surface or cause yarn breakage or fluff. For this reason, the filling rate of the yarn in the nozzle is reduced, that is, the nozzle diameter is increased in order to avoid this, but the amount of steam leaked out increases, and the disorder of the yarn due to the turbulent air flow becomes rather severe. On the contrary, if the filling rate of the yarn is increased, that is, the nozzle diameter is reduced to suppress the leakage amount, the possibility of contact with the inner wall becomes large, and the yarn breakage and the fluffing also increase. Moreover, the large amount of high-temperature steam leaking also poses a problem in terms of work safety.

On the other hand, regarding the threading operation, air sucker used for ordinary fiber operation is applied to the yarn outlet to perform the suction operation, but the suction efficiency is poor and the filling rate of the yarn must be lowered. Also, in the case of using multiple threads,
There are many problems such as extremely complicated operability.

The present invention has been achieved as a result of studies for solving the above problems, and its purpose is to minimize steam leakage and to prevent steam leakage.
It is an object of the present invention to provide a pressure steam treatment device capable of preventing disorder of yarns, eliminating damages of fluffs and fibers, and easily performing threading operation.

[0013]

In order to achieve these objects, the structure of the present invention is adopted. (1) A pressure steam for a yarn formed by mounting a labyrinth nozzle part before and after a pressure steam processing chamber. In the processing device, the yarn passage of the labyrinth nozzle has a slit shape, and the value S / W of the ratio of the slit height S to the width W of the yarn passage is 1/30 to 1/2. Inside the labyrinth nozzle portion, labyrinth nozzles having front and rear surfaces as flat surfaces are formed in multiple stages at right angles to the yarn flow direction and in the yarn flow direction, and the height h of the labyrinth nozzle and its The value of the ratio (h / p) of the pitch p is 0.3 to 1.
2, the labyrinth nozzle has 10 to 70 stages both in the front and rear labyrinth nozzles, and the air ejector is attached to the yarn outlet of the rear labyrinth nozzle part. Processing equipment.

(2) In a yarn pressure steam treatment apparatus in which labyrinth nozzles are mounted before and after the pressure steam treatment chamber, the yarn passage of the labyrinth nozzle has a slit shape. The value S / W of the ratio of the slit height S to the width W is 1/30 to 1/2, and the labyrinth nozzle having a saw blade-shaped cross section is provided in a multi-stage in the flow direction of the yarn inside the labyrinth nozzle portion. And the angle θ ₁ formed by the horizontal line passing through the apex of the upstream side of the labyrinth nozzle viewed from the yarn flow direction is 15 ° to 50 °.
°, the labyrinth nozzle has 10 to 70 stages both in the front and rear labyrinth nozzles, and the air ejector is attached to the yarn outlet of the rear labyrinth nozzle to provide a pressurized steam for the yarn. Processing equipment.

(3) In a pressure steam treatment apparatus for yarns, which is provided with labyrinth nozzles before and after the pressure steam treatment chamber, the yarn passage of the labyrinth nozzle has a slit shape, The value S / W of the ratio of the slit height S to the width W of the passage is 1/30 to 1/2, and the labyrinth nozzle having a chevron cross section is provided in multiple stages in the yarn flow direction inside the labyrinth nozzle portion. The labyrinth nozzle has an angle θ ₂ between 15 ° and 50 ° between the hypotenuse of the expansion chamber cross section and the horizontal line passing through the apex of the labyrinth nozzle, and the labyrinth nozzle part having the number of stages of the labyrinth nozzle is 1 respectively.
A pressure steam treatment device for a yarn, which has 0 to 70 stages, and in which an air ejector is attached to a yarn outlet of a labyrinth nozzle portion at a rear portion.

(4) The axis of the pressure steam treatment device is at an angle of 70 ° to 110 ° with respect to the ground so that the running direction of the yarn to be pressure steamed is in the range of 70 ° to 110 ° with respect to the ground. It arrange | positions in the range, The pressurized steam processing apparatus in any one of Claims 1-3.

(5) The pressurized steam processing apparatus according to claim 4, wherein the angle of the axis of the pressurized steam processing apparatus with respect to the ground surface is substantially vertical.

(6) The pressurized steam processing apparatus according to claim 4, wherein a yarn posture maintaining member is provided near the yarn inlet and outlet of the front and rear labyrinth seals.

(7) Using the apparatus described in claims 1 to 3, the filling rate F of the yarn in the labyrinth nozzle is 10% to 6
A method for pressure steam treatment of a yarn, characterized in that the content is 0%. Here, filling rate F = (K / (9 × 10 ⁵ × ρ)) / A where K: yarn fineness (denier) ρ: yarn density (g / cm ³ ) A: yarn passage area (cm ² ) (8) A pressure steam treatment method for a yarn, wherein the filling rate F of the yarn in the labyrinth nozzle is set to 10% to 60% by using the apparatus according to claim 4. Here, filling rate: F = (K / (9 × 10 ⁵ × ρ)) / A where K: yarn fineness (denier) ρ: yarn density (g / cm ³ ) A: nozzle passage area (cm) ² ) (9) A method for pressure steam treatment of yarn, wherein the filling rate F of the yarn in the labyrinth nozzle is set to 10% to 60% by using the apparatus according to claim 6. Here, the filling rate F = (K / (9 × 10 ⁵ × ρ)) / A where K: yarn fineness (denier) ρ: yarn density (g / cm ³ ) A: nozzle passage area.

The filling factor F defined by the above equation is derived as follows. That is, the yarn fineness is K
(Denier) = K / 9000 (g / m) = K / (9 × 10 ⁵ ) (g / cm)
And the cross-sectional area So (cm ² ) of a yarn with a yarn density ρ (g / cm ³ ) is
Since So = K / (9 × 10 ⁵ × ρ) (cm ² ), the cross-sectional area So divided by the cross-sectional area S ₁ of the yarn passage is the cross-sectional occupation ratio of the yarn.

In the present invention, since the yarn passage has a slit shape, if the nozzle passage area is A, the cross-sectional area of the yarn is obtained by dividing So by the nozzle passage area A and the filling factor F. Is defined as

[0022]

The thread enters from the labyrinth nozzle part in the front part of the pressure steam processing chamber, passes through the labyrinth nozzle part in the rear part, and moves to the next step.

The pressurized steam is supplied to the pressurized steam processing chamber, flows through the labyrinth nozzle portion before and after and leaks into the atmosphere, but when passing through the labyrinth nozzle portion of the present invention, the steam of the steam is generated in the expansion chamber. The expansion is rapidly performed and then gradually compressed, and the generation and extinction of the vortex flow are effectively and frequently repeated, the energy is extremely consumed and the decompression progresses to reduce the leakage amount. As a result, it is possible to suppress the amount of steam leaked out, and to prevent yarn damage and fluff generation. In addition, the number of labyrinth nozzle formation steps is 1
When the number of stages is 0 to 70, the chance of contact with the inner wall of the nozzle and the amount of steam leakage are effectively reduced.

Further, if the filling rate of the yarn is less than 10% or the number of stages is less than 10, the steam leakage amount increases, and if the filling rate exceeds 60% or the number of stages exceeds 70, the threading performance is deteriorated. Let

Further, when the thread passage of the labyrinth nozzle has a slit cross-sectional shape, the thread passes through the labyrinth nozzle in a flat state, so that the thread is heated uniformly, resulting in damage to the thread and generation of fluff. Prevent.

[0026]

The present invention will be described in detail below based on preferred embodiments. FIG. 1 shows a schematic configuration of a pressure steam processing apparatus according to the present invention.

The yarn a enters from the yarn inlet of the labyrinth nozzle portion 9 on the upstream side of the yarn across the pressure steam processing chamber 1, and passes through the yarn outlet of the labyrinth nozzle portion 10 on the downstream side of the yarn to the air. Move from the ejector unit 11 to the next step.

The pressurized steam b flows into the pressure chamber 3 through the steam inlet 2, passes through the perforated plate 4 and reaches the pressure steam processing chamber 1. Here, while performing a drawing process on the yarn a while depressurizing in both labyrinth nozzle portions 9 and 10,
It leaks to the outside.

As the labyrinth nozzle, one having a flat plate shape (FIG. 2), a saw blade shape (FIG. 4) or a mountain shape (FIG. 6) can be used. First, by using the plate-like labyrinth nozzle of FIG. 2 to suppress the amount of steam leakage in order to prevent the damage of yarns and the generation of fluff, and various experiments and examinations were repeated. It has been found effective to regulate the value of the ratio h / p of the pitch p to 0.3 to 1.2, more preferably 0.4 to 1.0. It is considered that the size of the expansion chamber is appropriate in this range, and vortexes with small rotations effectively repeat generation and disappearance in the expansion chamber, thereby consuming energy extremely and reducing pressure. To be

When the value is out of the above range, that is, when the value of h / p is less than 0.3, the size of the expansion chamber is too small, no vortex is generated in the expansion chamber, and the steam blow-through flow is large. Therefore, the amount of leakage increases.

Thus, by optimizing the cross-sectional shape of the expansion chamber, the amount of steam leakage can be suppressed, and damage to the yarn and fluff can be effectively prevented.

Next, various experiments and examinations were repeated using the saw blade-shaped labyrinth nozzle shown in FIG. 4, and as a result, in the labyrinth nozzle 12 having a substantially saw blade cross section, as viewed in the yarn flow direction of the expansion chamber cross section. It has been found effective to regulate the value of the angle θ ₁ formed between the hypotenuse on the downstream side and the horizontal line passing through the apex to 15 ° to 50 °, and more preferably 20 ° to 45 °. This is because the size of the expansion chamber is appropriate in this range, and when steam enters the expansion chamber, it rapidly expands and then gradually compresses, and a small rotating vortex effectively repeats the generation and disappearance of energy. Is extremely consumed, and it is considered that decompression proceeds.

Outside the above range, ie, θ ₁ is 1
If it is less than 5 °, the size of the expansion chamber is too small, swirls do not occur in the expansion chamber, and the steam blow-through flow becomes large, so the amount of leakage increases. On the other hand, when θ ₁ exceeds 50 °, the expansion chamber is too large, large vortices are stagnant, and the blow-by flow becomes large, so that the amount of leakage increases.

Thus, by optimizing the cross-sectional shape of the expansion chamber, the amount of steam leak can be suppressed, and damage to the yarn and fluff can be effectively prevented.

Furthermore, as a result of repeating various experiments and studies using the chevron-shaped labyrinth nozzle shown in FIG. 6, in the chevron-shaped labyrinth nozzle 12, a portion between the hypotenuse and the horizontal line passing through the apex of the expansion chamber cross-section. Set the value of angle θ ₂ to 15 °
It has been found that it is effective to restrict the angle to 50 °, more preferably 20 ° to 45 °. It is considered that the size of the expansion chamber is appropriate in this range, and vortexes with small rotations effectively repeat generation and disappearance in the expansion chamber, thereby consuming energy extremely and reducing pressure. To be

Outside the above range, that is, the value of θ ₂ is 1
If it is less than 5 °, the size of the expansion chamber is too small, swirls do not occur in the expansion chamber, and the steam blow-through flow becomes large, so the amount of leakage increases. On the other hand, when the value of θ ₂ exceeds 50 °, the expansion chamber is too large, large vortices are stagnated, and the blow-through flow becomes large, so that the amount of leakage increases.

As described above, by optimizing the cross-sectional shape of the expansion chamber, it is possible to suppress the amount of steam leakage and effectively prevent market damage and fluff.

The present invention can be applied regardless of the fineness of the yarn and is effective when the filling rate is in the range of 10% to 60%, but especially at a low filling rate of 15% to 40%. It is suitable for suppressing the leakage of

The number of forming stages of the labyrinth nozzle 12 is one.
The effective range is 0 to 70 steps, but the most effective number of steps is 15 to 40 steps in order to reduce the chance of contact with the inner wall of the yarn a and the amount of steam leakage.

If the filling rate of the yarn is less than 10% or the number of mounting steps is less than 10, the amount of steam leakage increases, and if the filling rate exceeds 60% or the number of mounting steps exceeds 70, the threading performance is improved. Getting worse. In order to improve the threading performance, a guide 13 is provided in the thread passage portion of the labyrinth nozzle 12 as shown in FIG. 3, or the oblique side of the expansion chamber cross section is not made to be a straight line. An expansion chamber shape that is curved and protrudes into the expansion chamber as shown is also effective. At this time, θ ₁ and θ ₂ are angles formed between a straight line connecting the upper and lower vertices of the expansion chamber slope and a horizontal line passing through the upper vertex.

In the present invention, various experiments and examinations were repeated in order to uniformly heat the yarn and to suppress the steam leakage amount to prevent the yarn from being damaged and the occurrence of fluff. As shown in (a) to (c), a labyrinth nozzle 12 having a slit-shaped cross section of the yarn passage can be used to pass the inside of the pressure steam processing chamber 1 while keeping the yarn in a flat state. It turned out to be effective.

By keeping the yarn flat, the penetration of steam into the yarn bundle and its arrival are promoted, and uniform heating in a short time is possible. The device of the present invention is particularly effective for a yarn having a number of filaments of several thousand or more, and can obtain high drawability.

The ratio S / W of the slit height (S) to the width (W) of the slit-shaped yarn passage is 1/30 to 1 /
2 is preferable, but 1/20 to 1/4 is preferable in order to uniformly heat the yarn and improve both sides of threadability. If the ratio is less than 1/30, the threading operability will be poor, and if it is more than 1/2, the yarn will be close to the state of a circular nozzle, and the flattening effect will be impaired.

The pressure steam drawing apparatus of the present invention can have not only a structure in which the yarn runs horizontally with respect to the ground surface, but also a structure in which the yarn runs vertically or nearly perpendicular to the ground surface.

When the yarn a is processed horizontally (hereinafter,
It is called horizontal processing B. However, most of the fluff that has been generated conventionally can be prevented, but the effect of the gravity of the yarn a on the ejection of the drain cannot be ignored. That is, the yarn a irregularly vibrates due to the unevenness of the steam and drain due to the slack of the yarn a due to gravity, which causes the labyrinth nozzle 12 or the like to be damaged and to cause fluff. This inconvenience is caused by the yarn posture maintaining member 14 near the inlet and the outlet of the yarn a as shown in FIG.
And 15 are provided, and the yarn to be steam-stretched is further stretched while traveling substantially perpendicular to the ground surface or at an angle close to vertical (hereinafter referred to as vertical treatment C). It is solved by the method of doing. Here, the angle close to vertical means a range in which the inclination angle with respect to the ground surface is 70 ° to 110 °.

That is, in order to maintain the positional relationship between the labyrinth nozzle and the yarn, the labyrinth nozzles 9 and 10 arranged before and after the pressure steam drawing chamber as shown in FIG.
It is desirable to provide posture maintaining members 14 and 15 near the yarn inlet and the yarn outlet of the above so as to substantially align the center of the yarn a with the centers of the labyrinth nozzles 9 and 10. In particular, since the yarn a before steam drawing is soft and easily damaged by contact, the posture maintaining member 14 on the yarn inlet side 14
Be careful when selecting. That is, as the posture maintaining member 14 on the inlet side, a movable member such as a free roller that freely rotates is preferable. On the other hand, the yarn a after drawing has increased orientation and the surface becomes stronger, and damage is not caused by a little contact and fluffing does not occur, but if tension is not evenly applied to the entire yarn during drawing, Single yarn breakage will occur at the concentrated part of the yarn, leading to the generation of fluff. Therefore, as the posture maintaining member 15 on the outlet side,
For example, it is preferable to spread the yarn a by using a fixing member such as a fixed guide and apply uniform tension to the yarn a.

According to the vertical treatment C, the influence of gravity of the yarn a can be neglected by causing the yarn a to run perpendicularly to the surface of the earth or at an angle close thereto, and the running yarn a The labyrinth nozzle 12 can always pass near the center. At the same time, the drain ejected from the labyrinth nozzle 12 is also stably passed and discharged in the labyrinth nozzle, so that the irregular vibration of the traveling yarn a does not occur and the yarn a and the labyrinth nozzle 12 come into contact with each other. It is also possible to obtain a yarn a in which fluff is not generated even if it is stretched at a high magnification, without damaging a. This effect is particularly great when the yarn a is run substantially vertically from the top to the bottom with respect to the ground surface, and even in the wet state of pressurized steam, which is a cause of fluff generation due to overdrying, the condensed drain Since it flows downward, an appropriate moist state can be always maintained from the extending portion to the outlet labyrinth nozzle portion 10. This can prevent generation of fluff due to overdrying.

The present invention also improves the suction efficiency by installing the air ejector 11, and temporarily compresses the compressed air c.
The yarn can be sucked by one-touch only by supplying the air to the air ejector 11, which is particularly effective when the yarn has a large number of spindles.

(Examples 1 to 3 and Comparative Examples 1 and 2) Acrylonitrile (AN), methyl acrylate (M
The copolymerization molar ratio of A) and methacrylic acid (MAA) is AN /
A dimethylacetamide (DMAc) solution of an acrylic polymer having MA / MAA = 96/2/2 (polymer concentration: 20% by weight, viscosity: 500 poise, temperature: 60 ° C.), a diameter of 0.075 mmφ, a number of holes of 3,000 and 15,000 Through the spinneret, the concentration is 70% by weight, and the bath temperature is 35 ℃.
After being discharged into a MAc aqueous solution and washed with water, it was drawn about 3 times in a hot water bath, dried at 135 ° C., and a densified yarn was obtained.

The running yarns of the yarns are subjected to horizontal treatment B method and vertical treatment C method using a pressure steam drawing machine, and the traveling speed of the yarns entering the pressure steam drawing machine is 23 m / m, respectively.
Under the same conditions of min and steam pressure of 3 kg / cm ² G, the state of fluff, the leakage of steam, etc. when the yarn filling rate was changed to 5 to 70% and stretched were observed, and the results were observed. It shows in Table 1.

[0051]

[Table 1]

In the drawing, the cross-sectional shape of the yarn passage is the slit shape shown in FIG. 9 (a), and the cross-sectional shape in the flow direction of the yarn is shown in FIG.
The labyrinth nozzles shown in FIGS. 5 and 7 were used, and the number of stages was set to 50 for both the front and rear labyrinth nozzle portions.

[0053]

As described above in detail, according to the device of the present invention, the threading operation can be easily performed even in the case of a multi-weight, the steam leakage amount can be minimized, and the yarn damage and the fluff can be prevented. Prevents stable pressure steam drawing process.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a schematic configuration of a pressure steam treatment device of the present invention.

FIG. 2 is a sectional view showing an example of a sectional shape of a labyrinth nozzle of the present invention.

FIG. 3 is a sectional view showing an example of a sectional shape of a labyrinth nozzle of the present invention.

FIG. 4 is a sectional view showing an example of a sectional shape of a labyrinth nozzle of the present invention.

FIG. 5 is a sectional view showing an example of a sectional shape of the labyrinth nozzle of the present invention.

FIG. 6 is a sectional view showing an example of a sectional shape of the labyrinth nozzle of the present invention.

FIG. 7 is a cross-sectional view showing an example of the cross-sectional shape of the labyrinth nozzle of the present invention.

FIG. 8 is a cross-sectional view showing an example of the cross-sectional shape of the labyrinth nozzle of the present invention.

FIG. 9 is a front view showing the shape of the yarn passage of the labyrinth nozzle of the present invention.

FIG. 10 is a schematic view showing another embodiment of the present invention.

FIG. 11 is a cross-sectional view showing a schematic configuration of a pressure steam treatment device that can be considered based on a conventional device.

[Explanation of symbols]

1 Pressurized steam processing chamber 2 Steam inlet 3 Pressurized chamber 4 Perforated plate 5,6 Labyrinth nozzle part 7 Labyrinth nozzle 8 Suction gun 9,10 Labyrinth nozzle part 11 Air ejector 12 Labyrinth nozzle 13 Guide member 14,15 Posture maintaining member θ _1, θ ₂ Angle a Thread b Pressed steam c Compressed air

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Eiichi Hamada 20-1 Miyuki-cho, Otake-shi, Hiroshima Mitsubishi Rayon Co., Ltd. Central Research Laboratory (72) Inventor Atsushi Nakajima At 1-4, Ushikawa-dori, Toyohashi-shi, Aichi 2 Sanryyo Rayon Co., Ltd. Toyohashi Plant (72) Inventor Akira Hatsukano 20-1 Miyuki-cho, Otake City, Hiroshima Prefecture Mitsubishi Rayon Co., Ltd. Central Research Laboratory (72) Inventor Hiroaki Yoneyama 20-1 Miyuki-cho, Otake City, Hiroshima Prefecture No. Mitsubishi Rayon Co., Ltd. Central Research Laboratory (72) Inventor Toshihiro Makishima 20-1 Miyukicho, Otake City, Hiroshima Prefecture Mitsubishi Rayon Co., Ltd. Central Research Laboratory

Claims (9)

[Claims] 1. A pressure steam processing apparatus for a yarn, wherein a labyrinth nozzle portion is mounted before and after the pressure steam processing chamber, wherein the yarn passage of the labyrinth nozzle has a slit shape. Slit height S relative to the slit width W of
A labyrinth nozzle having a front surface and a back surface as flat surfaces is provided inside the labyrinth nozzle portion at a right angle to the flow direction of the yarn and the yarn has a ratio S / W of 1/30 to 1/2. Of the labyrinth nozzle, the ratio (h / p) of the height h of the labyrinth nozzle to the pitch p of the labyrinth nozzle is 0.3 to 1.2, and the number of stages of the labyrinth nozzle is before and after. A pressure steam treatment device for yarns, each of which has 10 to 70 stages, wherein an air ejector is attached to a yarn outlet of a labyrinth nozzle portion at a rear portion. 2. A yarn pressure steam treatment apparatus comprising a labyrinth nozzle unit mounted in front of and behind the pressure steam treatment chamber, wherein the yarn passage of the labyrinth nozzle has a slit shape. Slit height S relative to slit width W
The labyrinth nozzle having a sawtooth-shaped cross section is formed in multiple stages in the flow direction of the yarn, and the value S / W of the ratio is 1/30 to 1/2. The angle θ ₁ formed by the hypotenuse and the horizontal line passing through the apex of the nozzle as viewed from the yarn flow direction of the nozzle is 15 ° to 50 °,
The pressure steam processing apparatus for yarns, wherein the number of stages of the labyrinth nozzle is 10 to 70 for both the front and rear labyrinth nozzles, and the air ejector is attached to the yarn outlet of the rear labyrinth nozzle. . 3. A pressure steam treatment apparatus for a yarn, wherein a labyrinth nozzle portion is mounted before and after the pressure steam treatment chamber, wherein the yarn passage of the labyrinth nozzle has a slit shape. Slit height S relative to the slit width W of
The value S / W of the ratio is 1/30 to 1/2, and the labyrinth nozzle of the chevron cross section is formed in multiple stages in the yarn flow direction inside the labyrinth nozzle part. The angle θ ₂ formed by the hypotenuse of the cross section of the expansion chamber and the horizontal line passing through the apex thereof is 15 ° to 50 °, the number of labyrinth nozzles is 10 to 70 in both the front and rear labyrinth nozzles, and the rear labyrinth nozzle is A pressure steam treatment device for a yarn, characterized in that an air ejector is attached to the yarn outlet. 4. The axis of the pressure steam treatment device has an angle of 7 degrees with respect to the ground so that the running direction of the yarn to be pressure steamed is in the range of 70 ° to 110 ° with respect to the ground.
The pressure steam treatment device according to claim 1, wherein the pressure steam treatment device is arranged in a range of 0 ° to 110 °. 5. The pressurized steam processing apparatus according to claim 4, wherein the angle of the axial center of the pressurized steam processing apparatus with respect to the ground surface is substantially vertical. 6. The pressurized steam processing apparatus according to claim 4, wherein a yarn posture maintaining member is provided near the yarn inlet and outlet of the front and rear labyrinth seals. 7. Using the apparatus according to any one of claims 1 to 3, the filling rate F of the yarn in the labyrinth nozzle is 10%.
To 60%, a method for pressure steam treatment of yarn. Here, filling rate F = (K / (9 × 10 ⁵ × ρ)) / A where K: yarn fineness (denier) ρ: yarn density (g / cm ³ ) A: yarn passage area (cm ² ) 8. A pressure steam treatment method for a yarn, wherein the filling rate F of the yarn in the labyrinth nozzle is set to 10% to 60% by using the apparatus according to claim 4. Here, filling rate: F = (K / (9 × 10 ⁵ × ρ)) / A where K: yarn fineness (denier) ρ: yarn density (g / cm ³ ) A: nozzle passage area (cm) ² ) 9. A pressure steam treatment method for a yarn, wherein the filling rate F of the yarn in the labyrinth nozzle is set to 10% to 60% by using the apparatus according to claim 6. Here, the filling rate F = (K / (9 × 10 ⁵ × ρ)) / A where K: yarn fineness (denier) ρ: yarn density (g / cm ³ ) A: nozzle passage area