JPS60246808A - Production of synthetic fiber - Google Patents

Abstract

PURPOSE:A specific applicator is used and the application is effected at a specific position to enable uniform and effective application of another fiber-treating agent without adverse effect of the finishing oil. CONSTITUTION:The finishing oil is applied to the yarn which has been cooled in the cooling zone 2 at the position where the yarn 3 is running downward. Then, the yarn is turned several times around the taking-up roller 5, then allowed to run upward and another liquid fiber treating agent is applied on its way of upward running. The application guide 7 has a nozzle on the lower side and a flat face that can uniformly contact with the yarn on the upper part.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to synthetic fibers modified by applying another liquid fiber treatment agent to the synthetic fiber yarn after melt spinning, following the spinning oil. The present invention relates to a method for uniformly and effectively applying a liquid fiber treatment agent without being affected by a spinning oil.

(Conventional technology) Conventionally, as a method of imparting excellent performance to synthetic fiber silk, flame-retardant/melt-retardant treatment agents, A so-called post-processing method is widely used, which consists of applying various synthetic fiber treatment agents such as antibacterial and insect repellent agents and water-repellent, oil-repellent and antifouling agents by spray coating or dipping. However, in the above post-processing method,
Since the treatment agent mainly sticks to the intertwined parts of the fibers, the fibers are deprived of free space between each other and the texture of the fibers deteriorates.Especially when applied by spray, uniform + J adhesion is lacking, and the fibers Because of the poor adhesion with the fibers, there are problems such as poor durability of the imparting function and the need to install treatment agent imparting equipment such as a spray or dipping device in the culm where the fibers are treated.

As a method to improve these problems, it is effective to apply a processing agent during the spinning process of synthetic fibers. There is a known method for producing water-repellent, oil-repellent, and stain-resistant synthetic fibers by mixing a spinning oil with a compound containing a bar 70 alkyl group and applying it to synthetic fibers during spinning. However, this method has major limitations in terms of compatibility between the spinning oil and the fiber treatment agent, and has the disadvantage that spinning properties and other fiber properties must be sacrificed to some extent.

When applying both the spinning oil and the 11M treatment agent in two stages using a known application device such as a kiss roll or slit guide, the surface tension, volatility, viscosity, and Due to various problems such as compatibility with spinning oil, it is extremely difficult to uniformly apply a fiber treatment agent with stable operability. In other words, when a kiss roll is used, the spinning oil in the first stage mixes with the fiber treatment agent in the second stage, so if the compatibility f1 between the two is poor, the treatment agent will separate. In addition, when using a slit type guide, when using a liquid composition with high surface tension such as a water-dispersed treatment agent, the oil or treatment agent can be applied intensively from the gaps between the yarns or from the discharge area where the yarn does not travel. Since discharge occurs, there is a problem of uneven adhesion.

(Problems to be Solved by the Invention) The purpose of the present invention is to uniformly apply other liquid fiber treatment agents to the surface of single synthetic fibers without being affected by the spinning oil during spinning of synthetic 5JIXtIi. Another object of the present invention is to provide a method for effectively attaching the adhesive.

As a result of intensive study by the present inventors to achieve the above objective,
By using a specific application guide and selecting a specific application position, uniform application of the fiber treatment agent can be achieved.
The inventors have discovered that this can be effectively achieved, and have arrived at the present invention.

(Means for Solving the Problems) 1J That is, the present invention applies a spinning oil to the synthetic fiber yarn traveling in the F direction after melt spinning, and then subsequently applies a liquid fiber treatment agent. After the spinning oil has been applied, the direction of the yarn is changed upward, and a discharge hole is provided at the bottom of the yarn traveling in the upward direction, so that the upper part of the 114 is in uniform contact with the yarn. The present invention provides a method for producing synthetic fibers, characterized in that a liquid fiber treatment agent is applied by contacting a liquid fiber treatment agent application guide having a flat surface.

Hereinafter, the present invention will be specifically explained using drawings F.

Figure 111 shows one implementation of the present invention f! FIG.

FIG. 2 is a front view A, a top view B, and a side view C of the application guide used in the present invention.

The synthetic polymer was melted as shown in FIG.

This is extruded from a spinneret 1 to form a synthetic fiber, which is then cooled in a cooling zone 2. The synthetic polymers used herein are melt-spun thermoplastic polymers such as polyamides, polyesters, polyurethanes, and polyolefins.

The cooled synthetic fiber yarn 3 is running downward.
Spinning oil is applied to the affected area by the device 4. The spinning oil can be a water-containing oil consisting of a leveling agent, an emulsifier, water, etc., or a known composition such as a non-water-containing oil diluted with a commercial oil and containing substantially no water. Use J “It is possible to do that.

Next, the synthetic fiber yarn 3 is wound several times by the take-up roller 5, and then the direction is changed to the -1 direction.In this way, at an arbitrary point while traveling in the F direction, the synthetic fiber thread 3 has an outlet hole in the lower part. , a part of the discharge hole has a flat surface that can uniformly contact the yarn (=I) By being in contact with the guide 7, the liquid fiber treatment agent (
I get raped. Here, as shown in FIG. 1, in order to align each single yarn on the same plane, it is preferable to provide alignment bins 6 before and after the E1 feeding guide 70 as necessary.

The application guide 7 used in the present invention is shown in detail in FIG. 2.1. ：As shown in FIG. 1, there is a discharge hole in the T direction, and there is a plane O in contact with the yarn uniformly above the 11 holes. It is designed to be guided to the discharge hole A.

Here, when the width of the discharge hole is a, l\ or the width is b, and the width of the thread is Y, a = 0.8Y-1,2Y.

b=o, d such that IY to 0.5Y can be preferably applied. Note that the number of discharge holes does not necessarily have to be one, and in some cases, two or more holes may be provided in a straight line or in a staggered pattern.

Also, the contact plane [length C of 1 is 5-150 mm) lill
J'C can be applied, but in order to reduce the contact resistance and achieve sufficient uniform adhesion, 10.~100IllI11
Preferably applied to gadoku. The length C of the contact plane mouth is 5
For II1m and above, the treatment agent was not evenly distributed, and the treatment agent was scattered at ij3 on the rear culm, and 150InI
It is undesirable to use more than 11 because friction resistance increases and single yarn breakage is more likely to occur. Suitable materials for this contact plane opening are satin-finished 1c gold FA and Relamic, and it is not limited to a perfectly flat surface, but may also be a gently curved surface.

It is important that the application guide 7 has the discharge hole A facing upward so that the lower surface of the yarn comes into contact with the yarn traveling upward so that it touches the discharge hole and the flat surface. Place it on the bottom surface of the thread running upward.
When contacting the application guide, please touch the discharge hole.
The treatment agent is evenly distributed over the yarn during the tj (containing the treatment agent and then contacting the flat surface). On the other hand, there is a case in which a liquid fiber treatment agent is applied to the yarn running downward after applying a spinning oil agent A-3, and a case in which a liquid IJi fiber treatment agent is applied by moving the discharge hole downward. Not only does the treatment agent drip down because it is not sufficiently retained on the yarn, or the treatment agent that has landed on the yarn is scattered due to the centrifugal force of the take-up roller, which not only contaminates the silk-spinning device, but also the treatment agent is left on the take-up roller. This is not preferable because it adheres and causes a decrease in spinning properties.

Also, the upward running angle of the thread is 3 with respect to the horizontal axis.
It must be 0° or more, especially 45° or more, and 300°
If it is less than this, the processing agent will drip, which is not preferable.

In the present invention, the liquid [f treatment agent] applied to the synthetic fiber yarn using the above-mentioned application guide includes a dragon flame treatment agent such as decabromosif 1-nyl ether, a refractory treatment agent such as methylolmelamine, and a quaternary silicone treatment agent. Anti-rl+ and insect repellents such as ammonium salts and dimethyl phthalate 5!11! I! Agents and parts [Liquid composition that adds new performance to synthetic vans such as water-repellent, oil-repellent, and antifouling agents such as urethane compounds containing 10 Alt bases'cIf]
The amount of these grants can be selected arbitrarily.

After the treatment agent has been applied in this way, the synthetic fiber yarn is then stretched and/or (Example 1) nylon 6 pellets are fed to an extruder and melted using a diagonal spinneret. Then, it was extruded as a spun yarn having 80 filaments. After cooling the yarn, a kiss roller is used to apply mineral oil (diluent) to the yarn as it continues to travel downward.
, tridecyl laurate (smoothing agent) and polyoxy,
2.0111% of a water-free spinning oil containing L-dilene 5-dodecyl J-thyl (Kaien active agent) as a main component was applied. Next, the yarn was wound around a take-up roller several times, and the running direction was changed from 'C' so that the direction of travel was upward and 85 degrees to the horizontal axis.
I aligned it to +u++.

On the other hand, a water repellent, oil repellent, antifouling agent, etc., is prepared by using an emulsifier containing a cationic surfactant as a main component and a small amount of an organic solvent. The aqueous dispersion treatment agent with a concentration of 7.5% obtained by dispersing the solution was supplied to the application guide using a gear pump.

Then, this application guide is installed at a position 3Qcm above the take-up roller so that the discharge hole and the contact plane are evenly in contact with the lower surface of the yarn running upward, and the amount of solid content of the treatment agent attached to the yarn is Supply the processing agent so that the amount is 0.3%
' was adjusted.

The application guide used here is made of ceramic and a =
5. It has a horizontally elongated discharge hole of 0mm, b -2,0IIB, the length C of the contact plane is 3oIIIll, and a gently curved surface with a radius of 500+++n in the vertical direction.

At this time...the treatment agent discharged from the outlet diffuses between the yarns while the yarn advances while uniformly contacting the contact plane of the application guide, and is uniformly retained on the yarn without dripping to the outside. It was done.

Next, the yarn was drawn to 3.5 (P!) using a drawing pin, and the drawn yarn was further heat-treated by winding it several times around a heated roller heated to 170°C.

The drawn yarn was then passed through a fluid jet nozzle with hot air at 260'C to form a bulky yarn, which was then wound up with a winder.

The yarn spinning performance during the operation described in L was good, gelation of the treatment agent did not occur at all, and the number of yarn breakages was 0.3 times/day. In addition, the culm was only contaminated once due to scattering of the treatment agent.

Water repellency, oil repellency, and anti-fog properties obtained in this way↑! Esu Iron 6 continuous high thread is 1300 denier, 80)
There was a three-dimensional lantern crimped yarn with r-lament.

Furthermore, 3 of the above bulky yarns were combined to make 40 turns/'n1.
After applying the S twist, tufting (Tough 1
- Apply to level loop carpet with gauge 5/32, Stella f-8, / inch, pile height Bmm, then dye with Wince dyeing machine ζ9! The water/oil repellent/stain resistant carpet was dried by drying at 1°C for 20 minutes.

As a result of evaluating the performance of Carbella 1-, it was found that it had extremely excellent water repellency, oil repellency, and stain resistance.

(Comparative Example 1) In Example 1, except that the guide for applying the water repellent, oil, and antifouling treatment agent was changed to Kiss 1]-La, the same strip 1 was used as As a result of manufacturing the yarn, there were no problems during short-term operation, but after continuous operation for about 10, + i, the spinning oil gradually mixed into the spinning agent, causing gelation and uneven adhesion. After that, thread breakage and process contamination occurred frequently, making continuous operation impossible.

The carpet obtained by processing the ζ-crimped yarn in the same manner was slightly inferior in water repellency, oil repellency, and stain resistance compared to the carpet of Example 1.

(Comparative Example 2) U in Example 1, the water repellent/oil repellent/antifouling treatment agent application guide was changed to approximately 30 cm below the kiss roller that applies the spinning oil agent.
＋＋＋ position so that the yarn running downward passes through the contact surface of the applying roller, and then the yarn is wound around the take-up roller several times before moving on to drawing. The rips are the result of manufacturing nylon 6 continuous crimped yarn under similar conditions.
[)-The C treatment agent was splashed on the machine, and the silk reeling equipment was seriously contaminated. Gradually, cuts occurred frequently (1F"[1; O, ! times, 2 days; 1.7 times,
3 [1 st; 1.0 times], continuous operation for a long time is impossible.

In this way, the carpet made by processing the crimped yarn in the same manner is also slightly inferior in water repellency, oil repellency, and stain resistance compared to the carpet of Example 1./CQ (Effect of the invention) According to the present invention, there is provided a method for producing a modified synthetic fiber by adding another liquid fiber treatment agent to the synthetic fiber yarn after melt spinning, following the spinning oil. It is possible to uniformly and effectively apply various liquid fiber treatment agents (-t') without any damage.

Also, the uniformity of the liquid fiber treatment agent” 4↑! 1. If the quantitative properties are not good, the processing agent may be scattered, and the processing agent may drip and stain the equipment.

Furthermore, synthesis I with novel performance obtained by the method of the present invention
IM not only eliminates the need for conventional post-processing processes, but also has fewer changes in quality (texture, texture, etc.) than conventional post-processed products, and is highly durable. be.

[Brief explanation of drawings]

FIG. 1 is a process diagram showing one embodiment of the present invention. Second
The figures are a front view Δ, a plan view B, and a side view C of the application kite used in the present invention. 1...Spinneret 2...Cooling zone 3...Synthetic fiber braid 4...Oil agent Ij-'+i device N5...・
Pick up [1-ra 6...bow 1 1 front pin 7... place 1111 agent i NJ"j guy (-8...
... Winder special h' [Applicant Toshi Co., Ltd.

Claims (1)

[Claims] After melt-spinning, a spinning oil is applied to the synthetic fiber yarn running downward, and then a liquid fiber treatment agent is applied to cover the yarn. A liquid fiber treatment agent imparting kite having a discharge hole at the lower part and a plane extending 4q in uniform contact with the yarn is brought into contact with the yarn traveling in the direction,
A method for producing synthetic fibers, which comprises applying a liquid l1li fiber treatment agent.