JPS58115114A - Oiling method - Google Patents

Abstract

PURPOSE:To suppress the occurrence of filament breakage and fluffs and obtain fibers with a high efficiency, by applying an anhydrous oil to thermoplastic synthetic filaments, blowing hot pressurized air in the turbulent state on the oiled filaments, reducing the viscosity of the oiling agent, dispersing the oiling agent, and applying the oiling agent uniformly to the resultant filaments. CONSTITUTION:In oiling thermoplastic synthetic fibers, filaments (Y) extruded through a pack 1 are oiled with a substantially anhydrous oil by a metering oiling nozzle 3, and hot pressurized air in the tubulent state is blown on the filaments (Y) in a hot pressurized air nozzle 6 to redisperse the oiling agent. The oiled filaments are passed through a godet roller 7 and once wound or led to a drawing zone. The hot pressurized air nozzle 6 leads the pressurized air from a pressurized air supply port 8 to an air chamber 9, and heats the pressurized air with an electric heater 10 provided on the side of the air chamber 9. The temperature of the pressurized air is controlled by measuring the temperature with a thermocouple 11 provided in the air chamber 9, and the hot pressurized air is jetted from jetting holes 12 provided on the vertical surface to the resultant filaments (Y) in three directions.

Description

[Detailed description of the invention] The present invention relates to a method for applying an oil agent.

More specifically, the present invention relates to a method for uniformly applying a substantially anhydrous oil to yarn.

When manufacturing thermoplastic synthetic #M fibers, an oil agent is applied to the threads to give them smoothness, antistatic properties, and various other properties, but is this oil agent a water-based emul? Free oils and substantially anhydrous oils (hereinafter referred to as straight oils) are commonly used. Among these, the popular water-based emulsion oil can be made to have a low viscosity at room temperature, so it is easy to apply the oil uniformly to threads by, for example, using a roller lubrication method that oils a rotating roller that is immersed in the oil solution while running and comes into contact with the thread. It is widely adopted because it can be attached.

! (K. Even with the above method, spots of adhesion of the oil agent may sometimes occur. In order to compensate for this drawback, the yarn to which the oil agent has been applied is guided to a gas turbulence nozzle and treated with pressurized air at room temperature to remove the oil agent. It is also possible to achieve uniform layering through distribution.
This was proposed in Japanese Patent Publication No. Sho SS-413gG.

On the other hand, the latter straight lubricant has a viscosity of 100% at room temperature.Even if the roller lubricating method described above is applied, the running condition of the yarn becomes unstable due to the viscous resistance of the lubricant on the roller, causing uneven adhesion of the lubricant. This causes frequent thread breakage and fluff in the post-wetting process, leading to a decrease in operability. For this reason, methods have been proposed that use nonflammable solvents such as carbon dioxide or low-viscosity mineral oils such as Chemisin as diluents.
In this case, there were many problems such as poor working environment due to smoke generation in the subsequent steps and recovery of the solvent, and it could not be put to practical use.

In addition, as a method for reducing the viscosity of such straight oil without adding a solvent, etc., it is possible to heat the straight oil to lower the viscosity and then dispense a certain amount with needles or apply it via a porcelain plate. Several methods have also been proposed. However, with this method, the amount of oil applied differs between the side of the yarn that is in contact with the *kipun-F and the side that is not, and the oil is not evenly applied to the entire yarn, resulting in subsequent work QK. However, there were still many single yarn breakages and feathers occurring in the process, and it could not be adopted for operational use.

The present inventors tried to see if it was possible to redisperse the $l agent by introducing the yarn to which the straight oil agent was once applied by this method to the gas turbulence nozzle described above and treating it in a vacuum at room temperature. . However, in this method, the temperature r of the attached oil agent has already decreased, so the oil agent viscosity is high (and redispersion could not be done in turbulent gas. Therefore, the oil agent attached to the yarn is still non-uniform. Single yarn breakage and fuzz still occurred frequently in subsequent steps.

However, this straight lubricating method would only be possible if the viscosity of the lubricant attached to the yarn could be reduced.

It is a method that is difficult to throw away because the oil agent can be uniformly applied with simple equipment and a thin thread can be obtained efficiently. Therefore, as a result of repeated studies by the present inventors on such methods,
The present invention was made based on the discovery that when a yarn to which a straight oil has been applied is introduced into a heated gas turbulence nozzle and treated, the straight oil is dispersed in the collar.

That is, 1. when applying an oil agent to thermoplastic synthetic fibers,
This method of applying an oil agent is characterized in that a substantially anhydrous oil agent is applied to the synthetic fiber yarn, and then heated and pressurized air is sprayed in a turbulent state.

To further clarify the present invention, when the yarn to which the straight oil agent has been applied is subsequently introduced into the heated turbulent flow nozzle, the yarn is opened by the heated and compressed air in the WL flow state, and the yarn has a compressed air. The oil attached to the filaments is heated and its viscosity decreases, and the oil whose viscosity has decreased is redistributed to each filament of the yarn by compressed air.
This makes it possible to achieve a uniform adhesion effect of the oil agent.

In the present invention, 15 thermoplastic synthetic fibers include polyamide-based materials such as polycabrolumtam and polyhexamethylene adipamide, polyester-based materials such as polyethylene terephthalate, and polyvinyl-based fibers. In particular, boria 1-do type is preferred.

In addition, the straight oil agent that can be placed in 1 jliK per bottle is IFl.
For example, Nisdel-ethylene glycol-glycerin between a polybasic acid such as adipic acid, sebacic acid, phthalic acid, or mellitic acid and a higher alcohol.

Trimethic Huff C1 Huff: 50 to 90 parts of a smoothing agent such as an ester of a polyhydric alcohol such as pentaerythritol and a higher fatty acid, etc., is added to an organic compound with C, -□ active hydrogen, such as ethylene oxide. Generally known synthetic fiber processing with a water content of less than 10 weight by combining surfactants such as ionic active agents and anionic active agents with 1J7al groups, II-related groups, sulfonic acid groups, etc., in combination with 5O-1O parts. It means a balm oil.

In the present invention, an important point in order to obtain a yarn uniformly coated with an oil agent is to spray IIJ hot-pressure air in a turbulent flow onto the yarn coated with a straight oil agent.

Here, as a method for opening the yarn by spraying positive pressure in the IL flow state, a plurality of pressures 9! 3~
It is preferable to blow out at a pressure of aklI/alG.

In addition, the temperature of the heated compressed air is preferably 40-180°C;
! The temperature is preferably 40 to 100°C. If the temperature is less than 40°C, the viscosity of the oil adhering to the threads will not decrease so much that it will be difficult to uniformly redisperse it using compressed air. On the other hand, if the compressed air temperature is increased to a high temperature exceeding 11.0° C., the yarn tends to shrink, causing an undesirable effect.

FIG. 1 is a peak line diagram showing a complete embodiment when the method of applying an oil agent of Akira is applied to spun yarn.

In Fig. 1111, the spun yarn Y discharged from the pack 1 is applied with a straight oil agent by a metering oil ring nozzle 3, and is sprayed with a heated and pressurized air in a turbulent state by a threaded heated and pressurized air nozzle ε to form an oil agent. 6 is dispersed and is once wound up via a controller 7 or subsequently led to a drawing line.

As the heated air pressure nozzle 6 mentioned above, for example, the nozzle shown in Fig. 2 can be used. Fig. 2 is a longitudinal cross-sectional view of such a nozzle, and Fig. 3 is a cross-sectional view of the nozzle 7 x-x'. . In FIGS. 2 and 3, 6 is a nozzle body;
The compressed air led from the compressed air supply port 8 to the air chamber 9 is air li.
It is heated by an electric heater 10 provided on the t@ plane. This temperature control is performed by measuring the compressed air temperature with a thermocouple 11 provided in the air chamber 9 and feeding this back to the controller.

The heated pressure chamber is ejected from injection holes 12 provided in three directions perpendicular to the yarn, and the yarn (
Collision with 1).

In the above example, the compressed air was heated by the electric heater 10 provided in the nozzle, but this
Needless to say, compressed air heated outside the nozzle may be used.

The method of applying an oil agent of the present invention may be applied when adding a stone oil agent to a drawn yarn, but it is generally preferable to apply it to a spun yarn obtained by melt spinning. In the production of 1D synthetic fibers, it is preferable to apply the so-called direct drawing method, in which the direct drawing method is performed, in which the fibers are continuously drawn immediately after being wound once after melt spinning. ') The yarn is coated with oil and is drawn immediately in a water-containing state without time for the water to evaporate.

When heated and stretched, thermal efficiency is significantly reduced due to the latent heat of vaporization of water, which impedes stretchability. However, by applying the oil application method of the present invention to the above-mentioned direct stretching method, ,5I! Qualitatively anhydrous straight oil can be uniformly applied to the spun yarn, thus creating an undrawn yarn with superior drawability compared to the conventional method of applying a water-based emulsion translucent oil or simply applying a straight oil. It is possible to obtain a drawn yarn with significantly improved quality of the final product. Furthermore, even when applying such an oiling method to oiling the yarn after drawing and winding it, the fluff of the drawn yarn once wound and the appearance of the package winding must also be significantly changed. I can do it.

The present invention will be explained in more detail with reference to Examples.

Example 1 A 1890 de/306 filtration film is produced from a nylon tire using a spinning method that directly connects the spinning and drawing processes.The non-aqueous components are 61 parts by weight of instearyl oleate, 30 parts by weight of EO-added sorbitan monoester, and 0-added onyl phosphate). An oil agent consisting of 5111 parts of Nm with a water content of 9% by weight is applied to the spun and cooled yarn as shown in Figure 1 through a needle oiling nozzle, and below it as shown in Figure 3. 4 o'clock/cIIG using a heated pressure nozzle
The pressure of current heat and pressure was blown into the air. This place is so
Take it off with a godet roller with a circumferential speed of osg/shoes, then stretch it in two stages &1x KJg, then heat set it at 2GG℃.
One roll of 0k cheese was obtained.

In this case, the percentage of cheese that could not be rolled up to 100 yen due to yarn breakage was expressed as the yarn breakage rate, and the strength of the yarn was measured as a representative example of quality.

The nozzle conditions and results are also listed in Table-1. The amount of these oil agents applied was expressed as LO weight % based on the amount of yarn Vcll.

Table-1 Shoulder ■ ~ Hire ■ adopt the oil application method according to the present invention, and have a remarkable improvement in the dough properties and quality compared to A6Φ which does not use a compressed air nozzle and eyebrow ■ which uses compressed air at room temperature. I know it's coming.

Example 2 The oil agent and oiling device used in Example 1 were changed to -y)O
After drawing yessoode/gsofil, the yarn is 10
00 m/time before being rolled up and treated.

The amount of oil applied was 0.4% by weight based on the weight of the yarn.

At this time, the degree of fluffing of the drawn yarn that was fired once and the quality of the package removal were evaluated, and the results are also listed in Table 2 along with the nozzle conditions.

Table-2 The following criteria were used for grading of the Fragment 1 fuzz layer.

O: Almost no fluff. ×: Fuzz present.

（′〕：Good ×; Large bulge on the chewing surface of the hands In the shoulders ■ to ■ by the oil application method of the present invention.

It can be seen that a product of significantly better quality can be obtained than shoulder ◎ which does not use a nozzle and 40 which uses compressed air at room temperature.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing how the present invention works. FIG. 2 is a longitudinal cross-sectional view of the heated pressurized air nozzle, and FIG. m3 is its x-x' cross-sectional view. 111E1 ~ ag odor processing, Y: yarn 3: needle amount oiling nozzle @: m heat pressure full pressure air nozzle godet roller 10; electric heater 12; heating pressure! Multiple injection holes 11g Yu 2 resistance $ 3 ■ 7

Claims (1)

[Claims] ill When applying an oil agent to the thermoplastic synthetic hem line, a substantially anhydrous oil agent is applied to the synthetic IalIa yarn. A method for applying an oil agent, which comprises subsequently spraying a heated pressure i in a turbulent state. C. The method for applying an oil agent according to claim (1), wherein the synthetic fiber yarn is a spun yarn obtained by melt spinning. (3) A method for applying an oil agent according to claim (1), wherein the heating and compressed air temperature is 40 to iso°C; (4)
Claim 8jl (a method for applying an oil agent according to item 13 and 18) in which the pressure of the heated compressed air is 3 to 6 k5 + 770. (5) Claim 1 in which the thermoplastic synthetic fiber is a polyamide synthetic fiber The oil application method described in section.