JPH10251934A - Application of finishing agent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for applying a finishing agent, by which the finishing agent is uniformly applied to a fiber bundle without worsening an operating environment and strong crimps can be formed in a crimping step after the application of the finishing agent. SOLUTION: This method for applying a finishing agent comprising a series of steps of a step for drawing and heat-setting a fiber bundle Y, a step for applying the finishing agent to the drawn and heat-set fiber bundle and a step for providing crimps thereto without drying the finishing agent-applied fiber bundle by using a dried and pushing-in crimper 7 is carried out by using at least two finishing agent-applying devices 6A and 6B each having one finishing agent-jetting hole and a reflecting board for widely diffusing the finishing agent jetted from the finishing agent-jetting hole, applying the finishing agent to both side of the traveling fiber bundle Y by jetting the finishing agent at 150-2,300cm/ sec showering linear velocity in a wide angle like a shower without bringing the finishing agent-application devices 6A and 6B into contact with the fiber bundle Y, and maintaining the temperature of the fiber bundle until the introduction into the dried and pushing-in crimper 7 so as to be >=120 deg.C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for applying a finishing oil to a yarn bundle before crimping by using a dry indentation crimping machine in producing short fibers (sufu). It is about.

[0002]

2. Description of the Related Art In the production of socks, an oil agent is applied to a stretched yarn bundle, and subsequently a crimp is applied by a dry crimping apparatus, and then the yarn bundle is cut into a souff. Examples of a method of applying the oil agent to the previous bundle of yarns include a method of applying the oil agent using a roller type oil supply device and a spray type oil supply device, and a method of immersing the yarn in an oil agent bath.

However, in the method of immersing the bundle of yarns in the oil bath, there is a problem that the oil in the bath is heated by the high-temperature yarn bundle and it is difficult to control the concentration of the oil. In addition, a method of applying an oil agent using a roller type oiling device uses a roller whose surface is coated with a porous material (for example, urethane foam), and immerses a part of this roller in the oil agent to form an oil film layer on the roller surface. In this method, a thread bundle is brought into contact with the roller to apply an oil agent. However, as the scum is generated over time, the oil agent permeability of the porous substance is deteriorated, and it becomes difficult to control the amount of the oil agent attached. There was a problem.

Further, in the method using a spray-type oil supply device, since the spray-type oil supply device ejects the oil in a mist state from a large number of fine discharge holes at a high pressure, an excessive amount of the oil agent is formed into a mist. As the work environment deteriorates significantly and the denier of the yarn bundle increases,
There has been a problem that it is difficult to uniformly apply the oil agent to the inside, and the amount of adhesion varies.

[0005] In order to solve such problems,
Japanese Patent Application Laid-Open No. 5-163924 discloses that at least two oil dispensing bases having oil dispensing holes are used, and the yarn bundle is run while contacting the yarn bundle with the surface of the base to apply the oil agent on both sides of the yarn bundle. A way to do that has been proposed. In order to apply a robust crimp to the yarn bundle, in a step before applying the crimp using a dry indentation crimping device, the yarn bundle must maintain a temperature after stretching heat setting to some extent. Although it is necessary, in the above-mentioned method, since the yarn bundle contacts the surface of the base,
There has been a problem that the temperature is greatly reduced, and it becomes impossible to provide a firm crimp.

[0006]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems, and enables the oil agent to be uniformly attached to the yarn bundle without deteriorating the working environment. An object of the present invention is to provide an oil agent applying method capable of applying shrinkage.

[0007]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and have reached the present invention. That is, the present invention, after the heat setting of the yarn bundle drawing, applying an oil agent, using a dry indentation crimping device,
In an oil applying step in a series of steps of applying crimp without performing drying, an oil applying apparatus having a single oil discharging hole and a reflecting plate for diffusing the oil discharged from the oil discharging hole at a wide angle is provided. Using at least two oil agents, the oil agent is sprayed at a shower linear velocity of 150 to 2300 cm / sec in the form of a shower at a wide angle, and the oil agent is applied to both sides of the running yarn bundle without contacting the oil applying device with the yarn bundle. The present invention provides a method for applying an oil agent, characterized in that the oil bundle is applied and the temperature of the yarn bundle is maintained at a temperature of 120 ° C. or more before the yarn bundle is introduced into a dry indentation crimping apparatus.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic process diagram showing one embodiment of the oil applying method of the present invention, FIG. 2 is a plan view showing one embodiment of the oil applying device used in the present invention, and FIG. 3 is a yarn bundle from the oil applying device. FIG. 3 is an explanatory view showing an embodiment of a state in which an oil agent is sprayed and applied in a shower at a wide angle.

First, as shown in FIG. 1, the yarn bundle Y is drawn and heat-set by a heat drum 1, then applied with an oil agent by an oil applying device, and then dried by a dry indenting crimping device 7. Without crimping. Then, in the step of applying the oil agent between the heat drum 1 and the dry indenting crimping device 7, the oil agent is provided so as not to be in contact with the yarn bundle Y traveling through the oil agent applying devices 6A and 6B.

The yarn bundle Y runs continuously while controlling the tension by the tension adjusting roller 5 between the fixed rollers 4A and 4B.
First, an oil agent is sprayed at a wide angle in a shower shape from an oil agent applying device 6A provided between the heat drum 1 and the fixed roller 2, and the oil agent is applied to one surface of the yarn bundle Y. Next, after passing through the fixed roller 2, the yarn Y is sprayed at a wide angle in the form of a shower from an oil agent application device 6 </ b> B provided between the fixed roller 2 and the fixed roller 3, and the other side of the yarn bundle Y Is applied to the surface.

After that, the yarn bundle Y is supplied to a dry indenting crimping device 7 through fixing rollers 4A and 4B and a tension adjusting roller 5, where the crimp is applied without drying. The oil agent jetted from the oil applying devices 6A and 6B is supplied from an oil agent bath 8 by a pump 9 to an oil agent supply pipe 10.
Is supplied to the oil applying devices 6A and 6B via

According to the present invention, an oil agent is applied to a yarn bundle by using at least two oil applying devices, and the oil agent is sprayed from the oil applying device at a wide angle in the form of a shower to form a yarn bundle. The oil agent is applied to each side, and the oil agent is applied well to both surfaces. However, even if the oil agent is applied to the yarn bundle using two oil agent applying devices, if the amount of adhesion is insufficient, The oil agent is applied using three or more oil agent applying devices as needed.

In the present invention, the temperature of the yarn bundle is maintained at a temperature of 120 ° C. or more after the oil agent is applied using such an oil agent application device and before the yarn agent is introduced into the dry indentation crimping device. is necessary. That is, the oil agent to be applied to the yarn bundle is usually a water emulsion oil agent. However, if the temperature of the yarn bundle after applying the oil agent and before introducing it into the dry indenting crimping device is less than 120 ° C., the applied oil agent is , Does not sufficiently evaporate, so that the rigidity of the crimp provided in the dry indentation crimping device is reduced. In order to prevent this, a step of drying the yarn bundle is required, which increases the cost, which is not preferable. The upper limit of the temperature of the yarn bundle is not particularly limited, but when the temperature is too high, the single yarns of the yarn bundle fuse together, and the flexibility of the yarn bundle becomes inferior.
Preferably, the temperature is about 160 ° C.

In order to maintain the temperature of the yarn bundle at a temperature of 120 ° C. or more, it is preferable to perform the drawing heat setting at a temperature of 120 ° C. or more. However, if the temperature of the yarn bundle after applying the oil agent becomes less than 120 ° C., the temperature of the yarn bundle until it is introduced into the dry indenting crimping device by passing through a heating roller, a heat treatment heater, etc.
Keep above 120 ° C.

When the oil agent is applied in the process shown in FIG. 1, the stretching heat setting in the heat drum 1 is performed at about 170 to 250 ° C., and the surface temperatures of the fixed rollers 2 to 4 and the tension adjusting roller 5 are set to 120 ° C. The temperature is preferably set to about 140 ° C.

Next, the oil applying device used in the present invention will be described. The oil dispensing device 6 has an oil guide hole 13, one oil discharge hole 14, and a reflector 15. The oil agent from the oil bath 8 is guided to the oil guide hole 13, and the oil agent communicated with the oil guide hole 13. This oil agent is ejected from the discharge hole 14. The reflection plate 15 diffuses the oil agent from the oil agent discharge hole 14 at a wide angle, and the oil agent is ejected from the oil agent discharge hole 14 toward the reflection plate 15, whereby the oil agent diffuses in a shower at a wide angle. Then, it is applied to the yarn bundle Y.

In the present invention, it is necessary to spray the oil from the oil discharge hole of the oil applying device in a shower at a shower linear velocity of 150 to 2300 cm / sec at a wide angle. When the shower linear velocity is less than 150 cm / sec, the oil agent does not squirt in a shower at a wide angle, the oil agent is not uniformly and sufficiently applied to the inside of the yarn bundle, and the adhesion amount of the oil agent varies. . On the other hand, when the speed exceeds 2300 cm / sec, the oil rushes against the reflecting plate and the oil applied to the surface of the yarn bundle also scatters, the oil is not uniformly applied, and the adhesion efficiency and the surrounding working environment deteriorate. I do.

The linear velocity of the shower is adjusted by changing the discharge amount of oil and the sectional area of the oil discharge hole.

The diameter of the oil discharge hole 14 ranges from 0.1 to 1.
It is preferable that the oil ejection rate is about 5 mm and the oil agent ejection rate is about 50 to 300 ml / min. If the diameter is less than 0.1 mm, the oil agent discharge holes 14 are liable to be clogged by impurities contained in the oil agent, and the oil agent is not sufficiently ejected, so that the oil agent is not easily and uniformly applied to the yarn bundle. On the other hand, the diameter is 1.5m
When the diameter exceeds m, the diameter of the oil agent discharge hole 14 becomes large, the shower linear velocity decreases, the flow rate of the oil agent discharged from the oil agent discharge hole 14 varies, and it becomes difficult to spray the oil agent in a shower at a wide angle. It becomes difficult to uniformly apply the oil agent to the strip. The shape of the oil discharge hole 14 is not particularly limited to a round shape as long as the oil is discharged well, and may be a flat shape and a polygon such as a triangle or a square.

In order to eject the oil agent in a shower shape at a wide angle from the reflector 15, the inclination angle θ _A of the reflector 15 is set to 95 to 16
Preferably it is 0 degrees. If the angle is less than 95 degrees, the angle of spread of the oil reflected by the reflection plate is small, and it is difficult to form a wide-angle shower.If the angle exceeds 160 degrees, the angle of spread of the oil reflected by the reflection plate is too large, and a good angle is obtained. In this case, it is difficult to jet the oil into a shower, and in both cases, it is difficult to uniformly apply the oil agent to the entire yarn bundle.

[0021] Note that the angle be jetted in a shower shape at a wide angle oil in oiling device (in FIG. 3 theta _B), the inclination angle theta _A shower or linear velocity of the reflection plate 15, oiling device and the yarn The optimum value may be appropriately determined in relation to the bundle distance, but is preferably about 30 to 90 degrees.

The distance between the oil applying device and the yarn bundle is 5
Preferably, the traveling speed of the yarn bundle is
It is preferably 70 to 250 m / min, and the yarn bundle to which the oil agent application method of the present invention is applied is preferably about 100 to 1.5 million denier. Further, the material of the oil application device is not particularly limited, either, but it is preferable to use ceramic, stainless steel, or the like that can prevent the generation of rust.

[0023]

Next, the present invention will be specifically described with reference to examples. In addition, the characteristic value etc. in an Example were calculated | required as follows. (1) Shower linear velocity Shower linear velocity (cm / sec) = Q ÷ 60 ÷ d Q: Discharge amount of oil agent (ml / min) d: Oil agent discharge hole area (cm ² ) (2) Oil agent adhesion efficiency Oil agent adhesion efficiency (%) = Average of the amount of oil applied (% by weight) ÷ Theoretical applied amount (% by weight) × 100 Oil applied: Apply the obtained yarn bundle (length 18 cm) in the width direction.
After dividing into 10 equal parts and weighing the weight (w ₁ ) of the sample for each, an oil agent was extracted with 10 ml of ethanol, and the weight (w ₂ ) of the sample after drying was measured.
It was calculated by [(w ₁ -w ₂ ) / w ₂ ] × 100, the average value was obtained, and the maximum, minimum and standard deviation were also obtained. Theoretical adhesion amount: Calculated by the following formula. Theoretical weight (% by weight)
= [Discharge rate of oil agent (ml / min) x 60 x number of oil applying units x specific gravity of oil agent (g / ml) x ^10-3 x concentration of oil agent (wt%)
÷ 100 / production amount (kg / h)] × 100 production amount (kg / h) = [total denier number (d) of obtained yarn bundle × drawing speed (m / min) × 60 × 10 ^{− 3} ] / 9000 (3) Crimp modulus Determined according to the measuring method of JIS-1015-7-12-3. (4) Percentage of attached moisture Take 5 g of the cut swatch from the obtained bundle of yarns, measure the mass thereof, dry it at 100 ° C. for 30 minutes with a drier, and measure the mass of the dried sample. It was calculated by the following formula, and represented by the average value of two tests. W: mass at the time of collection of the sample (g) W ₁ : mass of the sample after drying (g) Adhered water percentage (%) = (W−W ₁ ) / W ₁ × 100

Examples 1-2, Comparative Examples 1-2 Intrinsic viscosity [η] (measured at 20 ° C. using a mixed solution of phenol and ethane tetrachloride as a solvent) 0.68 polyethylene terephthalate was added to a spinneret (350 holes). ), Discharge amount 238g
Per minute, at a spinning temperature of 285 ° C. and a spinning speed of 1100 m / min to obtain an undrawn yarn. Align the obtained undrawn yarn,
A tow-shaped undrawn yarn bundle is drawn at a drawing speed of 120 m / min between a supply roller (70 ° C) and a drawing roller (90 ° C).
The yarn was drawn twice to obtain a drawn yarn bundle having a fineness of 700,000 denier. Next, the yarn bundle was run at a take-up speed of 120 m / min and heat-treated at 180 ° C. with a heat drum 1 in accordance with the process shown in FIG. 1, and an oil agent was applied to the yarn bundle. At that time, using two oil applying devices 6A and 6B having the shape shown in FIG. 2, the finishing oil of a nonionic water emulsion at a temperature of 20 ° C. (oil concentration: 5% by weight) such that the amount of oil applied becomes 0.1% by weight. , Specific gravity of oil agent: 1.0 g / ml). The angle θ of the reflector of the oil applying device 6 was 115 degrees. At this time, the diameter of the oil discharge hole, the discharge amount of the oil discharged from the oil discharge hole, and the shower linear velocity of the oil supply device were variously changed as shown in Table 1. The temperature of the fixed rollers 2 to 4 and the tension adjusting roller 5 was set to 130 ° C., and after passing through these rollers, the yarn bundle was dry-introduced into the crimping device 7. The temperature of the yarn bundle was measured with a non-contact type thermometer (THI-500 manufactured by TASCO) at a position after passing through the fixed roller 4 and before being introduced into the dry indenting crimping device 7. ° C. Thereafter, crimp was applied by a dry indentation crimping device 7 and cooled by a cooling conveyor, and the yarn bundle was cut into a predetermined fiber length to obtain short fibers. The average, maximum, minimum and standard deviation of the oil agent adhesion amount of the obtained short fibers,
Table 1 shows the oil agent adhesion efficiency, the crimp modulus, and the moisture content.

Comparative Example 3 An oil agent was applied in the same manner as in Example 1 except that the oil agent was sprayed at 320 ml / min from the spray type oil supply device using a spray type oil supply device instead of the oil agent application devices 6A and 6B. , Short fibers were obtained. Table 1 shows the average value, the maximum value, the minimum value, and the standard deviation of the oil agent adhesion amount of the obtained short fibers, the oil agent adhesion efficiency, the crimp elastic modulus, and the adhesion moisture ratio.

Comparative Example 4 The temperature of the heat drum 1 was set to 130 ° C.
4. Since the temperature of the tension adjusting roller 5 is set to 100 ° C., the temperature of the yarn bundle before being introduced into the dry indentation crimping device 7 is
The procedure was performed in the same manner as in Example 1 except that the temperature was 87 ° C. Table 1 shows the average value, the maximum value, the minimum value, and the standard deviation of the oil agent adhesion amount of the obtained short fibers, the oil agent adhesion efficiency, the crimp elastic modulus, and the adhesion moisture ratio.

[0027]

[Table 1]

As is clear from Table 1, in Examples 1 and 2, the oil agent can be uniformly applied to the entire yarn bundle with good adhesion efficiency, and a strong crimp is applied by a dry indentation crimping device. Things have come. On the other hand, in Comparative Example 1, the shower linear velocity of the oil ejected from the oil ejection hole was too low.
The oil agent did not squirt in a shower at a wide angle, the oil agent was not uniformly applied to the inside of the yarn bundle, and the amount of adhesion was large. In Comparative Example 2, since the shower linear velocity of the oil ejected from the oil ejection hole was too high, the oil scattered on the surface of the reflector or the bundle of yarns, the amount of adhesion was large, and the adhesion efficiency was poor. In Comparative Example 3, since the spray-type oil supply device was used, it was not evenly applied to the inside of the yarn bundle, the dispersion of the adhesion amount was large, the oil agent adhesion efficiency was poor, and the working environment was deteriorated. In Comparative Example 4, the temperature of the yarn bundle before it was introduced into the dry indentation crimping device was too low, so that the obtained yarn bundle had a high moisture content and a low crimp elastic modulus.

[0029]

According to the oil agent applying method of the present invention, the oil agent can be uniformly applied to the entire yarn bundle with good adhesion efficiency without deteriorating the working environment. It becomes possible to give a firm crimp.

[Brief description of the drawings]

FIG. 1 is a schematic process diagram showing one embodiment of a method for applying an oil agent of the present invention.

FIG. 2 is a plan view showing one embodiment of an oil applying device used in the present invention.

FIG. 3 is an explanatory view showing one embodiment of a state in which an oil agent is sprayed from a oil applying device onto a bundle of yarns at a wide angle in the form of a shower and applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat drum 2, 3, 4A, 4B Fixed roller 5 Tension adjusting roller 6A, 6B Oil applying device 7 Dry press-in crimping device 13 Oil introducing hole 14 Oil discharging hole 15 Reflector 16 Oil Y Yarn bundle

Claims (1)

[Claims] 1. An oil agent is applied in a series of oil agent application steps in which a yarn bundle is applied after a yarn bundle is stretched and heat-set, and a crimp is applied without drying by using a dry indenting crimping device. At least two oil dispensers having a single hole and a reflector for diffusing the oil ejected from the oil dispensing hole at a wide angle are used.
Applying oil to both sides of the running yarn bundle without contacting the oil agent application device with the yarn bundle while spraying it at a wide angle from 0 to 2300 cm / sec in the form of a shower, A method for applying an oil agent, characterized in that the temperature of the yarn bundle is maintained at a temperature of 120 ° C. or more before introduction.