WO2003060204A1 - Spinneret, oiling device, production device and production method for synthetic fibers - Google Patents

Abstract

A spinneret, an oiling device, a spinning device and a spinning method that are used for the production of synthetic fibers. The spinneret has a single row of nozzle holes (2). Yarns spat out from the nozzle holes (2) of the spinneret (1) are taken up by a take-up roll (12) via an oiling device (8) and godet rollers (9, 10) without being twisted. A spinneret (20) is formed with grooves (24) radially extending from a nozzle hole (23). Molten polymer filtered by a filtering material (22) is allowed to enter the nozzle hole (23) via the grooves (24). An oiling device (31) may be provided with an oiling member (8) and a guide member (9) to eliminate defective oiling by the collaboration between them.

Description

 Specification

 Spinneret, oiling device, manufacturing device and manufacturing method for synthetic fibers

 Technical field

 The present invention relates to a spinneret, an oiling device, a manufacturing device, and a manufacturing method for synthetic fibers. Details are as follows.

 The present invention firstly relates to a spinneret for spinning a plurality of yarns and then dividing, solidifying and taking up the yarns, and a method for producing synthetic fibers using the spinneret. The present invention relates to a spinneret capable of suppressing physical property fluctuation between a plurality of yarns.

 Second, the present invention is suitable for use in producing polyurethane fibers, polyester fibers, polyamide fibers, polyolefin fibers, and the like.

The present invention relates to a spinneret capable of extending the life cycle of 'and stably discharging a polymer.

 Thirdly, the present invention provides an apparatus for producing an elastic fiber made of polyurethane or the like used for clothing and the like, a method for producing the elastic fiber, and an oil ring for a continuously spun elastic fiber. And an oiling device for the same.

 Background technology

 In general, a synthetic fiber spinning device includes a spinneret for spinning a polymer, an oiling device for oiling a yarn coming out of a spinning hole of the spinneret, and a winding roller for winding the oiled yarn. And

 Various improvements have been made to the spinning device to stably produce high-quality yarn. However, there are still some improvements to be made to each component and their arrangement, as described below.

 Spinneret

 In the production of synthetic fibers, in which a polymer is discharged from a spinneret, solidified and drawn, from the viewpoint of productivity, it is common to discharge polymers from multiple spinnerets for one spinning machine stand and pull out multiple yarns. It is being done.

Conventionally, the spinneret used in such a spinning device has a circular arrangement and a diamond arrangement for the arrangement of the spinning holes, mainly for the effective use of the area of the spinneret, for reasons such as ease of handling and maintenance. , Grid array, staggered array, etc. An article having an arrangement having the same was used.

 However, in such a conventional spinneret, the temperature difference is large depending on the position of the spinning hole, and the state of the cooling air blown to the yarn after the spinning is changed by spinning the polymer from a plurality of rows. However, due to these, there is a problem that physical property variation between yarns becomes large.

 Especially in the case of melt-elastic yarn made by melt-spinning, the spinning tension during spinning is so low that the change in cooling state during spinning cooling is not affected by ordinary melt-spinning with polyester, etc. There was a problem that the yarn greatly affected the spots and the product quality deteriorated.

 In addition, for spinnerets, foreign matter is generally removed by passing through a filtration material before spinning the molten polymer from the spinning holes. In this melt spinning process, from the viewpoint of easiness of operation, simplification of equipment, etc., as schematically illustrated in FIG. Place a space between the filter material 100 and the spinneret 101 so that the polymer can pass through the entire surface of the filter material evenly before 1 and use the entire filter material 100 effectively. A method of implementing the method with a structure is known.

 However, in the melt spinning, the pressure applied to the filter medium 100 is generally high, and foreign substances accumulate on the filter medium 100 with continued use. As a result, the pressure applied to the filter medium 100 increases, and as shown in FIG. 14, the entire filter medium 100 or the structural members are deformed, and the spinning holes 10 3 of the spinneret 101 are rotated. Abnormal flow in the upper introduction section, or in some cases, a semi-obstructed situation. In such a state, a sudden increase in filtration pressure, a decrease in filtration efficiency, and abnormal flow will be induced, causing adverse effects such as poor discharge when discharging from the spinning hole. However, there was a problem that the filtration efficiency had to be replaced as soon as possible, even though the filtration performance still remained in the filtration media itself, which reduced the production efficiency. In particular, when the ejection area is smaller than the area of the filter medium, such as a spinneret for a monofilament, such a problem is conspicuous.

 Oiling equipment

The equipment is designed to prevent damage caused by scratching of yarn in the synthetic fiber spinning equipment. Oil is applied to the yarn to prevent it and to provide smoothness and facilitate handling.

 As this type of oiling device, a part of the roller is immersed in a tank filled with oil and rotated to make a uniform layer of oil adhere to the surface of the roller, and the yarn runs on this surface. Depending on the type, there is a roller system that applies oil to the yarn.

 Further, there is a guide system in which oil is supplied to a yarn by supplying oil to a groove provided in a guide portion, guiding the yarn to the groove, and running the yarn.

 In these oiling devices, the spun yarn comes into contact with the application surface before or at the same time as the oil is applied, before being wound by the winder. The spun yarn is extremely unstable above the point where it comes into contact with the surface to which oil is applied, because it is not completely solidified. Therefore, the fluctuation of the frictional resistance at the contact surface amplifies the unstable state of the thread and adversely affects the properties of the wound thread, particularly, the homogeneity.

 In order to solve such a problem, the present applicant has proposed a guide for applying oil supplied from an oil supply hole formed in a groove to the thread by passing the thread through the groove. An oiling device having at least a portion, wherein the groove has a vertex having a tangent to a vertical line (of the yarn), and an angle of receding from the vertex with respect to the vertical line (of the yarn). It has an upper slope and a lower slope, and has a narrowest portion near the top, and the oil supply hole is opened in the groove surface at least 3 mm above the top of the groove, In addition, an oiling device is proposed, characterized in that the hole is opened in a groove surface separated from the perpendicular by 2 mm or more (of the yarn) and that the hole has a diameter larger than the narrowest groove width. (Japanese Patent Publication No. 5-230706).

 The oiling device described in Japanese Patent Publication No. 5-230706 is an excellent invention in that the contact area between the yarn and the guide is as small as possible and oil can be supplied while reducing friction. It is.

In recent years, there has been an increasing demand for elastic fibers capable of obtaining added value such as elasticity and fit, and the elastic fibers are 50 to 300% in a practical area as represented by polyurethane elastic fibers. And has high stretching properties. Such elastic fibers are After being spun from the yarn spinning hole and air-dried, oil is supplied as oil to reduce friction with guides, etc. A quantity of oil is supplied.

 However, even if a large amount of oil is to be supplied to the elastic fiber by the oiling device disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 5-230706, the elasticity may be reduced due to rolling, vibration and other factors. If the fiber is separated from the oiling device even momentarily and does not come into contact with the oiling device, a portion where the oil supply to the elastic fiber is insufficient occurs, and there is a problem that the performance of the elastic fiber is significantly reduced.

 Arrangement of spinning device

 In recent years, as described above, polyurethane elastic fibers have attracted attention due to their high elastic properties. The polyurethane elastic fiber is used for various applications because a small amount of the polyurethane elastic fiber can impart a value to the fabric such as extensibility, fit, shape stability and the like.

 Known methods for producing polyurethane elastic fibers include dry spinning, wet spinning, and melt spinning. Above all, polyurethane elastic fibers obtained by melt spinning have excellent heat setting properties, abrasion resistance and transparency, and have low production costs. As a result, their usage has increased in recent years. As described above, the melt spinning method is a method in which a molten polymer is spun from a spinneret, the spun fiber is cooled and solidified by cold air, and then oiled and wound around a roll.

 The winding of the elastic fiber was carried out in the same manner as polyester or nylon fiber with low elasticity. That is, the melted polymer is extruded from an extruder (not shown) to a spinneret, and elastic fibers are spun from each spinning hole almost vertically downward. Each elastic fiber is cooled and solidified by blowing cool air by a blower, and after the oiling agent is applied by a boiler, the arrangement direction of the elastic fiber is twisted by 90 ° by a guide member. The elastic fiber whose orientation has been changed in this way is adjusted in tension via two godet rollers, sent out to a take-up roller, and taken up in each opening.

By the way, in the manufacturing apparatus as described above, the elastic fibers spun from the spinneret are twisted, and the arrangement direction is rotated 90 ° and wound up. And the frictional force received from the yarn path length and the guide member are different. For this reason, there has been a problem that did not occur when winding conventional polyester or nylon. In other words, polyurethane elastic fibers are more easily elastically deformed than polyester or the like, and if wound with different yarn path lengths and frictional forces as described above, the physical properties of the viscous fibers W between the rolls This resulted in the problem that the product characteristics varied greatly. For example, at the mouth located at the center of the take-up roller, the elastic fiber spun from the spinneret is wound up with almost no twist, while at the mouth located at the end. Since the elastic fiber spun from the die is wound with a large twist angle change by the guide member, the frictional resistance associated with contact with the guide member is large. The tension difference of the elastic fiber between the rolls Had occurred. In particular, in the roll at the end, the yarn path length of the elastic fiber was long, so that the air resistance received by the elastic fiber was large, and the difference in tension from the roll on the center side was further increased.

 If there is a difference in the frictional force applied to the elastic fibers, there arises a problem that the thickness, the elasticity, the strength, the shape of the mouth of the wound fiber, and the like of the fibers are different. When fabrics are manufactured by combining rolls wound with fibers having these characteristic differences, there has been a problem that the product value is reduced, for example, striped patterns and the like become very poor in appearance.

 Disclosure of the invention

 The present invention provides the following invention for the purpose of solving the above-mentioned conventional problems.

 Spinneret

 A first object of the present invention is to minimize the difference in temperature and the cooling state of a plurality of yarns produced from a spinning machine table until they are cooled from the inside of the spinning hole. It is an object of the present invention to provide a spinneret capable of suppressing physical property fluctuations between yarns.

 The first object of the present invention is a spinneret for producing a plurality of yarns, wherein a plurality of spinning holes are formed in a single base plate, and the spinning holes are arranged in substantially one row. This is achieved by the spinneret.

A plurality of spinning holes are drilled in the spinneret plate alone, and the spinning holes are arranged in approximately one row In this way, the temperature fluctuations on the spinneret surface are small, and the cooling air temperature due to the cooling of the yarns in the front row does not increase due to the single-row spinning cooling, and the cooling air hitting the front row has no effect. For the first time, uniform yarn can be spun without any change in the cooling state.

 The spinneret according to the present invention preferably has eight or more spinning holes. This is because the effect of the present invention is easily exerted in a field where the number of spinning holes is increased, that is, in a field where high productivity is required.

 Further, it is preferable that cooling air is sent to the row from a substantially vertical direction to the polymer discharged from the spinneret in which the spinning holes are arranged in one row. By sending the cooling air according to this method, the temperature of the cooling air received by each yarn becomes uniform, the temperature of the spinneret becomes uniform in the row direction, and the temperature difference between the spinning holes becomes smaller. The present invention is particularly preferable when it is used for the production of a melt-type elastic fiber, since it is particularly effective. Elastic yarns generally have extremely low spinning tension compared to general-purpose yarns such as polyester yarns and polyamide yarns.The physical properties of the elastic yarns are greatly affected by the temperature of the spinneret and the temperature of the spinning cooling air. This is because not only gender differences appear remarkably, but also yarn skew in the cooling section causes yarn gap differences, which causes yarn spots and yarn breakage.

 According to the present invention, the spinning holes are required to be drilled substantially in a line, and the number of filaments is 1 to 3 in consideration of a necessary spinning hole distance in order to facilitate the fiber separation operation. Books are preferred.

 Next, a second object of the present invention is to improve the production efficiency by extending the filter material replacement cycle without causing discharge failure by effectively drawing out the filtration capacity of the filter material installed in the spinneret. It is to provide a possible spinneret.

 In view of the fact that the filtration efficiency is reduced due to the contact with the spinneret due to the deformation of the filtering material, the present inventors have made intensive studies to solve the conventional problems, and as a result, have reached the present invention.

 That is, in order to achieve the second object, the present invention provides a spinneret provided with a filter medium for removing foreign matter from a molten polymer above a spinneret, and after passing through the filter medium. And a guide groove for guiding the molten polymer to the spinning hole is provided.

By providing a groove in the spinneret to guide the polymer after passing through the filter medium to the spinning hole, Even if the filter media changes and comes into contact with the spinneret, at least the filter media surface immediately above the groove can ensure the passage of the polymer, so that the filter surface can be used effectively and poor ejection can be achieved. It is possible to extend the replacement period of the filter media for a very long time without causing any problems.

 The groove for guiding the polymer after passing through the filtering material according to the present invention to the spinning hole is preferably provided radially around the spinning hole. With this arrangement, the polymer that has passed through the filter material can be smoothly guided to the spinning hole. When the spinneret used in the present invention has one spinning hole for one filter medium, the effect is remarkable. That is, as in the case of a spinneret for a monofilament, the effect of the present invention is remarkably exhibited when the area of the introduction portion at the upper portion of the spinning hole is smaller or smaller than the area of the filtering material.

 The shape and depth of the groove are design items in consideration of the size of the spinneret, the strength of the filtering material, and the like, and are not particularly limited. However, it is important that the polymer is always guided to the yarn hole. Otherwise, the polymer will not eventually pass through the filter. Also, the grooves of the spinneret are preferably dispersed over the entire surface of the filter medium, and have a small width and a large number. If the width is large, the groove may be closed due to the deformation of the filter medium.If the groove is provided locally, or if the number is small, the filter capacity of the filter medium cannot be fully drawn out or discharged. Is not performed smoothly.

 Further, the projection formed as a result of providing the groove may have an acute angle toward the filter medium. Thereby, the area of contact with the filter medium can be reduced while maintaining the strength of the projections, and the filter medium can be used effectively. The protrusion formed as a result of providing the groove in the spinneret may be in contact with the filter medium from the beginning of the installation of the filter medium. This is because even in such a state, the effect of the spinneret according to the present invention works effectively.

Further, the spinneret according to the present invention is preferably used for spinning an elastic yarn represented by polyurethane. This is because, as compared with general-purpose yarns such as polyester yarns and polyamide yarns, yarn spots are generated due to disturbance, and the effects of the present invention are particularly remarkable as soon as possible. Next, a third object of the present invention is to secure the contact between the elastic fiber and the oiling guide. It is an object of the present invention to provide an oiling device for ensuring the quality of the elastic fiber while preventing the frictional force due to the contact with the oiling device from becoming excessive while performing the oiling surely.

 The third object of the present invention is a boiler including: an oil applying section for applying oil to elastic fibers; and a guide member for guiding the elastic fibers to the oil applying section. The oil applying section has a groove for guiding the elastic fiber, and an oil supply hole formed in the groove for applying oil to the elastic fiber passing through the groove. A vertex portion to be a tangent, and an upper slope and a lower slope having an angle of receding from the vertex with respect to the vertical line, wherein the elastic member on the downstream side of the top has This is achieved by an oiling device for a flexible fiber, which is arranged so as to make a retreat angle of more than 0 ° and 3 ° or less with respect to the upstream elastic fiber.

 It is preferable that the groove width of the narrowest portion adjacent to the apex is 1.5 mm or less. The surface roughness of the vicinity of the apex of the oil applying portion and the guide member is preferably 2S to: L0S.

The non-woven fiber preferably has a number of filaments of 2 or less, a total fineness of 88 or less, and is preferably a melt-spun elastic fiber. Next, a fourth object of the present invention is to provide an elastic fiber manufacturing apparatus comprising: a plurality of spinning holes; and a take-up roller for winding the elastic fibers spun from the spinning holes. The holes are arranged in a line, and the arrangement direction is substantially parallel to the axial direction of the winding roller, thereby achieving the elastic fiber manufacturing apparatus. The manufacturing apparatus is provided between the spinning hole and the winding roller, and guides an elastic fiber spun from the spinning hole substantially vertically downward to the winding opening roller. Further, the guide member is arranged at an interval wider than the arrangement interval of the spinning holes, and the guide member is vertically arranged from the spinning hole to the guide member due to the difference in the arrangement interval. With respect to the inclination angle with respect to the line, the difference between the maximum value and the minimum value may be configured to be 1.5 ° or less. Further, the manufacturing apparatus is provided at a position from the spinning hole to the guide member. The apparatus may further include an oiling device for oiling the elastic fiber from the pressing direction of the guide member for inclining the elastic fiber. Here, the portion from the spinning hole to the guide member means a portion including the guide member, and therefore, the guide member may be provided with an oiling device.

 Further, the present invention provides an elastic fiber spun from a plurality of spinning holes arranged side by side in a row by a winding roller having a rotation axis substantially parallel to the arrangement direction of the spinning holes. An object of the present invention is to provide a method for producing an elastic fiber characterized by winding.

 In the above manufacturing method, a guide member may be disposed between the spinning hole and the winding roller at an interval wider than an interval between the spinning holes, and the guide member may move the elastic fiber substantially vertically downward by the winding roller. The maximum and minimum values of the inclination angle of the elastic fiber from the spinning hole to the guide member with respect to the vertical line, which is caused by the difference in the arrangement interval between the spinning hole and the guide member. The difference from the value can be less than 1.5 °.

 Further, in the manufacturing method, an oil agent is applied to the elastic fiber from a pressing direction of the guide member for inclining the elastic fiber at a position from the spinning hole to the guide member. Things. Here, the portion from the spinning hole to the guide member means a portion including the guide member, and therefore, an oil agent can be applied to the guide member.

 BRIEF DESCRIPTION OF THE FIGURES

 FIG. 1 is a perspective view showing one embodiment of a spinneret according to the present invention.

 FIG. 2 is a perspective view conceptually showing a melt spinning apparatus having the spinneret shown in FIG. -FIG. 3 is a perspective view showing a conventional spinneret.

 Fig. 4 shows another embodiment of the spinneret according to the present invention. Fig. 4 (a) is a plan view, Fig. 4 (b) is a longitudinal sectional view, and Fig. 4 (c) shows the spinneret together with a filtering material. It is sectional drawing which shows the spinneret pack accommodated in the pack.

FIG. 5 is a front view schematically showing a melting prevention device including one embodiment of the oiling device according to the present invention. FIG. 6 is a side view schematically showing the melt spinning apparatus shown in FIG. 5 together with other accessory devices.

 FIG. 7 is an enlarged longitudinal sectional view of the oiling device shown in FIG.

 FIG. 8 is a front view of the oiling device of FIG.

 FIG. 9 is a perspective view showing an embodiment of a guide member which is a component of the oiling device according to the present invention.

 FIG. 10 is a partial front view of FIG.

 FIG. 11 is a perspective view showing a melt spinning apparatus for comparison with the melt spinning apparatus of FIG.

 FIG. 12 is a plan view showing the positional relationship between the spinneret of FIG. 11 and a guide member. FIG. 13 is a longitudinal sectional view showing a conventional spinneret.

 FIG. 14 is a longitudinal sectional view showing a change with time of the diameter of the spinneret of FIG.

 BEST MODE FOR CARRYING OUT THE INVENTION

 One embodiment of the spinneret according to the present invention will be described below with reference to FIGS.

 As shown in FIG. 1, a plurality of spinning holes 2 are formed in a spinneret 1, and the spinning holes 2 are arranged in substantially one row. The spinneret 1 has eight spinning holes 2. The number of the spinning holes 2 is preferably 8 mm or more.

 The material and dimensions of the spinneret used for the spinneret 1 are not particularly limited, and it is sufficient that no deformation or distortion occurs under the conditions of the polymer used.

 The cross-sectional shape of the fiber obtained by using the spinneret 1 is not particularly limited, and may be represented by a round shape, a triangular shape, a hollow shape, or a cross shape, and may be an aggregate having a different cross section. The degree of irregularity and the hollow ratio are not particularly limited.

 A spinneret pack 3 in which the spinneret 1 is arranged in a case is arranged in a melt spinning device 4 as shown in FIG.

 The melt spinning device 4 includes an extruder 5, a gear pump 6, a spinneret pack 3, an air blower 7, an oiling device 8, a Goddler 9, 10, a friction roller 11, and a winding roller 12.

The molten polymer is extruded by an extruder 5 and sent to a gear pump 6. Gi The pump 6 extrudes a predetermined flow rate of the molten polymer. The molten polymer extruded from the gear pump 6 is sent to the spinneret pack 3. The spinneret pack 4 distributes the molten polymer into a plurality of yarns by the spinneret 1 and spins out. The plurality of spun yarns W are cooled by a blower 7, then oiled by an oiling device 8, and wound up by a winding roller 12 via Goded rollers 9, 10. An evaluation test comparing the spinneret 1 according to the present invention with a conventional spinneret will be described below. In the conventional spinneret, as shown in FIG. 3, two spinning holes 11 are formed in one spinneret plate 10. These spinnerets were assembled in the prevention device shown in Fig. 2, and both spinnerets were evaluated.

 Evaluation of yarn sway at the cooling part: The yarn sway at 2 cm below the cooling start position by the blower was visually evaluated and evaluated according to the following criteria.

 ：: Single thread yarn sway width less than 2 mm No periodicity in thread sway

 △: Single thread yarn swing width 2 mm or more and less than 4 mm

 X: Single thread yarn swing width 4 mm or more

 Yarn spot measurement evaluation: Yarn spots were measured by Keisokki Evenness Tester Model KE 80C manufactured by Keisoku Kogyo Co., Ltd. in a state where the raw yarn was sent out at a positive unwinding (feeding speed · 7.85ηι / πΰη) and stretched to 200%. The measurement conditions are as follows: measurement mode: inert mode, sample speed: 8 m / min, electrode length of the measurement electrode: 18 mm, electrode width: 0.13 mm, sample measurement time: 5 min, twister rotation of the multifilament: lOOOr.pm Was measured.

 For each sample, each level was set to n = 24, and the average value of 24 U% (I) was determined and evaluated according to the following criteria.

 〇: U% (I) less than 2%

 △: U% (I) 2% or more and less than 3%

 X: U% (I) 3% or more

Evaluation of yarn physical property variation: Measure using RTM-250 Tensilon manufactured by Toyo Paul Douin Co., Ltd. As the initial load, 1/11 g was added to the yarn fineness (dtex.), And the measurement was performed with n = 5 for one sample under the conditions of a yarn length of 50 mm and a tensile speed of 500 mm / min. Calculate the average value of breaking strength and breaking elongation. For each sample, each level was set to n = 24, and the breaking strength and breaking elongation R were determined and evaluated according to the following criteria. 〇: R of rupture strength is less than 0.07 cN / dtex. And R of rupture elongation is less than 20% Δ: Rupture strength is 0.07 or more and less than 0.14 cN / dtex. Or rupture elongation is 20% or more Less than 30%

 X: R of breaking strength is 0.14 cN / dtex. Or more, or R of breaking elongation is 40% or more.

 Knitted fabric evaluation: Make a standard sample of bare knitted fabric grade and send the raw yarn MODEL TN-1 (3.5 inch hook diameter, 350 needles) made by Koike Seisakusho with active unwinding (feeding speed 84m / min) Set the rotation speed of the knitting pot to 168r.pm and knit for 2 minutes. The obtained bare bite knitted fabric is put into a standard knitted fabric determination blackboard and the knitted fabric is stretched to a predetermined position. Compare the bare knitted fabric standard sample prepared in advance with the knitted fabric sample and visually check the bare knitted fabric grade (1st grade is extremely good, 2nd grade is good, 3rd grade is normal, 4 is bad, 5th is dirty) (Grading).

 The samples were evaluated according to the following criteria based on the average value of the grade of bare knitted fabric and the grade rank of each knitted fabric with each level n = 24.

 ：: Bear average knitted fabric grade Less than 2.5 grade and no grade 4 or 5 grade.

 Δ: bare average knitted fabric grade 2.5 or more and less than 3.5 and no grade 5 judgment.

 X: Bear average knitted fabric grade 3.5 or higher or grade 5 judgment.

 (Example 1)

 The thermoplastic polyurethane resin was melt spun at a spinning temperature of 220 ° C, and the base material, SUS630 W360XT80XH20mm, was spun through a spinneret with a spinning hole diameter of Φ1.0 and a linear array of 24 holes in a single row. After cooling the yarn by blowing a lway cooling air vertically to the row, an oil agent was applied by roller oiling to wind a molten spandex yarn (22 dtex, 1 filament). The swaying of the yarn at the cooling part during winding, the yarn physical properties of the obtained yarn, the measurement of yarn spots, and the evaluation of bare knitted fabric were performed.

 (Example 2)

The thermoplastic resin is melt spun at a spinning temperature of 220.The base material is SUS630 W360XT80XH20mm, and the spinning hole diameter is Φ1.0. The lway cooling air is blown vertically to the row to cool the yarn, and then the oil is applied by roller oiling to wind up the melted spandex yarn (44 dtex, 2 filaments). Carried out. (Example 3)

 The thermoplastic polyurethane resin was melted at a spinning temperature of 220 ° C, and the spinning hole diameter φ1.0 36 holes were linearly arranged in a single row on the base material SUS630 W360 X T80 X H20 mm, and discharged from the spinneret and straightened. A m / min lway cooling air was blown vertically to the row to cool the yarn, and then oil was applied by roller oiling to wind up a molten spandex yarn (66 dtex, 3 filaments), and the same evaluation was performed. did.

 (Comparative Example 1)

 Melt spinning of thermoplastic polyurethane at a spinning temperature of 220, and a base material of SUS630 W360XT80XH20mm with a spinning hole diameter of φ1.0 24 holes, the cooling air blowout surface, the first row hole and the second row hole are vertical, and the first row The distance between the spinneret and the second row spinneret is 4 mm.The yarn is discharged from the spinneret that is linearly arranged in two rows and cooled by a rectified 0.3 m / min lway cooling air. The melted spandex yarn (22 dtex, 1 filament) was wound and the same evaluation was performed.

 (Comparative Example 2)

 Melt spinning of thermoplastic resin at a spinning temperature of 220 ° C, spinning hole diameter φ1.0, base hole of SUS630 W360 X T80 X H20mm, cooling hole blowing surface, first row of holes and second row The spinneret is vertical and the distance between the first-row spinneret and the second-row spinneret becomes 10 mm.The yarn is discharged from the linearly arranged spinneret in two rows and rectified by 0.3 m / min lway cooling wind. After cooling, an oil agent was applied by roller oiling, and a molten spandex yarn (22 dtex, 1 filament) was wound up, and the same evaluation was performed.

 (Comparative Example 3)

 Melt spinning of thermoplastic resin at a spinning temperature of 220 and spinning of base material SUS630 W360 X T80 X H20mm with a spinning hole diameter of φ1.0, two holes with the angle between the first and second rows of holes 15 ° and the distance between the first and second rows of holes is 10 mm.The yarn is cooled by 0.3 m / min lway cooling air discharged from the spinnerets arranged in two rows and arranged in a straight line. The same evaluation was carried out by applying an oil agent by laoiling and winding a molten spandex yarn (22 dtex, 1 filament).

 (Comparative Example 4)

Melt spinning of thermoplastic polyurethane resin at 220 ° C, base material SUS630 W360XT80XH20mm with a hole diameter d> 1.0, 24 holes straight line in two rows with the angle between the first and second row holes being 30 ° and the distance between the first and second row holes being 10mm After cooling the yarn with 0.3m / min lway cooling air discharged from the arranged spinneret and rectifying it, oil is applied by a single-layer oiling to wind up a molten spandex yarn (2 2 dtex, 1 filament), and similar evaluation Was carried out.

 Table 1 shows the evaluation results of Examples 1 to 3 and Comparative Examples 1 to 4.

 【table 1】

 (Comparative Example 5)

 Melt-spinning of thermoplastic polyurethane resin at a spinning temperature of 220 ° C, base material SUS630 W360XT80XH20mm, base diameter φ1.0, 24 holes, the angle between the first and second row holes is 60 °, the first line The distance between the spinning hole and the second-row spinning hole is 10 mm.The yarn is discharged from the two-row linearly arranged spinneret, cooled by the rectified 0.3 m / min lway cooling air, and then melted by a roller oiling device. The same evaluation was performed by winding a spandex yarn (22 dtex, 1 filament).

 (Comparative Example 6)

 The thermoplastic polyurethane resin is melt spun at a spinning temperature of 220 ° C, and the base material SUS630 W360 X 80 X H20 mm has a spinning hole diameter of φ1.0 24 holes.The cooling air blowing surface, the first row of holes and the second row of holes Roller oiling after cooling the yarn with 0.3m / min lway cooling air, which is discharged from the spinnerets arranged in two rows and arranged linearly in two rows, and the distance between the first and second rows of holes is 10mm The same evaluation was performed by applying an oil agent and winding a molten spandex yarn (44 dtex, 2 filaments). Table 2 shows the evaluation results of Comparative Examples 5 and 6.

 [Table 2]

Replacement form (Rule 26) Thread shaking XX

X X

Physical properties X X

Knitted fabric evaluation X X

Overall rating X X

 As is clear from Tables 1 and 2 above, according to the spinneret of the first embodiment, when the discharged polymer is subjected to fiber drawing, the spinneret temperature is made uniform and the influence of disturbance is reduced. Eliminates cooling differences between yarns in the easy-to-receive cooling process, stabilizes the supply of yarn with little yarn spots, reduces losses due to yarn spots in the intermediate processing step, and improves the quality of final products Thus, it is possible to provide a yarn capable of improving the yield.

 Another embodiment of the spinneret according to the present invention will be described below with reference to FIG.

 The spinneret 20 is housed in a case 21 as shown in FIG. On the spinneret 20, a filter medium 22 is placed. The spinneret 20 has a single spinning hole 23 at the center of the spinneret 20. The spinneret 20 has a plurality of guide grooves 24 for guiding the molten polymer that has passed through the filter medium 22 to the spinning holes 23. The plurality of guide grooves 24 are formed radially around the spinning hole 23. A tapered hole portion 25 is formed on the inflow side of the spinning hole 23.

 A test for evaluating the performance of such a spinneret 20 has been performed, and will be described below.

 (Example 4)

 A polybutylene adsorbate-based polyol diphenyldiene succinate / 14 A polyurethane polymer having a Shore A hardness of 90 consisting of butanediol is supplied to a spinning device equipped with a single-screw extruder to obtain a spinning temperature of 2. The mixture was extruded from a spinneret having the following structure through a filter medium at 20 ° C., and a continuous operation was performed under a winding speed of 500 m / min to obtain a 20-denier monofilament.

 Spinneret structure: as shown in Figure 4

 Number of spinning holes: 1

 Angle of taper above spinning hole: 30 °

Diameter of spinning hole upper part: 2. Οπιπι Replacement paper (Rule 26) Spinning hole diameter: 0.28ΙΉΠΙΦ

 Spinning hole length: 0 · 56 mm

 Spinneret groove arrangement: radial (angle between grooves 18)

 Number of grooves: 20

 Groove width: 0.5 mm

 Groove depth: 0.5 mm

 Filter media-spinneret distance:. .5 mm

 When spinning was performed under the above conditions, the back pressure of the filter medium at the start of spinning was 4 MPa, but after 7 days, the back pressure only increased to 4.7 MPa, and no discharge failure occurred during this time. Was. The operation was stable for 30 days. The filter medium after 30 days of use did not show any depression in the tapered hole.

 (Comparative Example 7)

 A spinneret similar to that in Example 4 was used, except that there was no groove for guiding the polymer after passing through the filter medium to the spinning hole. The spinning conditions were the same as in Example 4.

 When the above spinning was performed, the back pressure of the filter medium at the beginning of the spinning was 6 MPa, but reached 10 MPa after 7 days, and 15 MPa after 12 days, resulting in poor discharge. The situation began to occur and the filter media had to be replaced. After 12 days, it was confirmed that the filter medium was depressed in the hole 25 of the taper.

 (Comparative Example 8)

 A spinneret similar to that of Example 4 was used except that there was no groove for guiding the polymer after passing through the filter medium to the spinning hole, and the distance between the filter medium and the spinneret was O nmi with the filter medium in contact with the spinneret. The spinning was performed under the same conditions as in Example 4.

 When the above spinning was performed, the back pressure of the filter medium at the beginning of the spinning was 8 MPa, but after 7 days it reached 15 MPa, and the discharge medium began to occur. The situation was unavoidable. Seven days later, the filter medium was confirmed to be depressed in the tapered hole. Next, one embodiment of the oiling device for elastic fibers according to the present invention will be described below with reference to FIGS.

5 and 6, 31 is an oiling device, 32 is a spinneret pack, 3 3, 3 3 ′ are Goded rollers, F is a friction roller, P is a paper tube, and in FIG. 6, 34 is a gear pump, 35 is an extruder, and 36 is a blower. The elastic fiber W spun from the melter pack 32 passes through the oiling device 31, passes through the Goded rollers 33, 33 ′, and is wound up on the paper tube P through the friction opening roller F.

 The oiling device 31 includes an oiling member 38 for applying oil to the elastic fiber W, and a guide member 39 for guiding the elastic fiber W to the oiling member 38. The oiling member 38 and the guide member 39 constitute a guide for the elastic fiber W. As shown in FIGS. 7 and 8, the oiling member 38 has a groove 40 for guiding the elastic fiber W, and an opening formed in the groove 40 for applying oil to the elastic fiber W passing through the groove 40. It has an oil supply hole 42 communicating with the hole 41, and the groove 40 has a vertex 43 that is in contact with a vertical line H virtually provided in FIG. 7, and a vertical line H from the vertex 43. An upper slope 44 and an upper slope 45 having an angle of receding with respect to each other, and a narrowest portion 46 near the apex 43.

 The vertex 43 is preferably rounded with a small radius (for example, 0.1 to 20 mm), but is not particularly limited. It is important that the elastic fiber W comes into contact only at the apex 43, and therefore the angles α, β at which the upper slope 44 and the lower slope 45 recede from the apex 43 to the vertical line H (See FIG. 3) is not limited, but each has an angle of preferably 15 ° to 70 ° as a preferable range. As shown in Fig. 7, the position of the opening 41 in the groove 40 must be such that the shortest distance dΗ from the apex 43 to the opening 41 is 3 mm or more and above the elastic fiber running direction. However, it is preferable that the shortest distance L at which the opening position is separated from the virtual vertical line H is 2 mm or more. The term "vertical line" of the present invention is used to define the oiling device of the present invention, and in actual spinning, the elastic fiber is formed by the upper slope 44 (lower slope 45) and the vertical line. You may enter between (α, / 3).

Further, it is preferable that the maximum diameter of the opening 41 is larger than the value (Ν in FIG. 8) where the width of the groove 40 is minimum. As shown in FIG. 7, the groove 40 has a trapezoidal side cross section as shown in FIG. 7. As shown in FIG. 8, the groove 40 extends upward toward the narrowest portion 46 near the apex 43 in a front view. At a certain angle from the V-shape, It can be shaped to spread in an inverted V-shape at an angle toward it. The side wall of the groove 40 forms a groove with the upper slope and the lower slope facing each other, but may have a curved shape in which the side wall is not clearly present.

 The width N of the narrowest part 46 of the groove part 40 is preferably 0.1 to 1.5 mm. This is because if the width N of the narrowest part 46 of the groove part 40 exceeds 1.5 mm, it becomes difficult to effectively prevent the yarn from swaying in the groove part 40, and oil adhesion spots easily occur. Because. Further, it is preferable that the depth D of the groove 40 up to the apex 43 is 3 to 10 mm. Preferably, the maximum diameter of the opening 41 is 0.2 to 0.4 mm larger than the minimum width N of the narrowest portion 46 of the groove 40.

 The oiling member 38 having the above structure fixes the spun fusible fiber by the groove against the change in position until it is wound up, and fixes it in the running direction (vertical direction of the 弹 fiber). The effect on the unstable region due to frictional fluctuation at the point is significantly reduced, and it has the function of making the yarn quality uniform.

 As the guide member 39, for example, as shown in FIG. 9, two comb-shaped plates 39 'and 39' are arranged along the direction in which the elastic fibers are arranged, and elastic members are provided in the gaps between the teeth of the comb teeth. It can be configured to pass fibers.

 The guide member 39 has a receding angle ε of more than 0 ° and not more than 3 ° with respect to the virtually hung vertical line H from the vertex 43, where the elastic fiber downstream from the vertex 43 of the oiling member 38 is formed. (See FIG. 7), more preferably, it is necessary to arrange so as to have a receding angle ε of 2 ° or less, and the shape and the like are not limited as long as this requirement is satisfied.

 It is preferable that the surface roughness of the vicinity of the apex of the oiling member 38 and the surface roughness of the guide member 39 be 2 to 1 OS. This is because if the surface roughness is smaller than 2 S, the actual contact area increases and the friction increases.On the other hand, if the surface roughness is too large, the surface tension fluctuates and the difference in the oil retention force increases. This is because when the surface roughness exceeds 10 S, the oil adhesion amount tends to be uneven.

Further, the elastic fiber W having a filament number of 2 or less and a total fineness of 88 or less is suitable for the oiling apparatus according to the present invention. Because, when the number of filaments exceeds 2, the convergence state between filaments varies, and the present invention If the total fineness exceeds 88, a portion where no oil agent is attached is likely to occur in the circumferential direction.When such a portion comes into contact with the guide portion, excessive frictional resistance is locally generated. Because we receive.

 Tables 3 and 4 show the results of evaluation tests using a melt spinning device equipped with an oiling device as described above.

 Table 3 shows the results of measuring the running tension of the yarn wound at a different receding angle ε when stretching 200%. Table 4 shows the results of measuring the occurrence rate of defective winding shape of cheese and the occurrence rate of any step with changing the receding angle ε. In the running tension measurement test, the elastic fiber supply speed was 15.7 m / min, the measurement time was 1 minute, and the data acquisition interval was 0.2 seconds / time. In Tables 1 and 2, A to L correspond to 12 cheeses (elastic fibers wound on a winding roller in a cheese shape).

 [Table 3]

 ST200 average

 (g)

[Table 4]

Stepping rate (%)

From Table 3, it can be seen that there is almost no variation until the retraction angle ε is up to 3 °, but when the retraction angle ε is larger than 4 °, the variation in running tension may increase. I understand.

 Also, from Table 4, when the receding angle ε exceeds 2 °, a step (cheese winding shape defect) occurs, and the stepping rate increases as the receding angle ε increases. According to Table 4, the receding angle ε is preferably 2 ° or less, but as a practical yield, if the receding angle is 3 ° or less, it is within the allowable range for operation.

 As is clear from Tables 3 and 4, as a result of the evaluation test, according to the oiling device of the present invention, the receding angle ε is set to be greater than 0 ° and 3 ° or less by the guide member. As a result, it was possible to reduce the variation in running tension and the occurrence rate of stepped defects. As a result, the oiling device according to the present invention ensures the supply of oil by ensuring the contact between the elastic fiber to be spun and the guide for applying oil, and prevents the frictional force due to the contact from becoming excessive. Thus, the quality of the elastic fiber can be maintained.

 Next, an apparatus for producing an elastic fiber according to the present invention will be described with reference to FIG. 2 and FIG.

 In the present embodiment, a melt spinning apparatus for producing a polyurethane elastic fiber will be described.

 As shown in FIG. 2, the melt spinning device 4 is arranged so that the spinneret 3 from which the elastic fiber W is spun extends in a direction substantially parallel to the axial direction of the winding port 1 1 2. It is significant that the spinning holes 2 for discharging the elastic fibers W are arranged in a line at equal intervals along the longitudinal direction of the base 3.

An extruder 5 that melts and extrudes the polymer to the spinneret 3 is connected to the spinneret 3 via a gear pump 6. Almost immediately below the spinneret 3, a plurality of guide members 59 for arranging the elastic fibers W in parallel with the direction in which the spinning holes 2 are arranged and for regulating the deviation of the yarn path are provided. As shown in FIG. 10, each guide member 59 is arranged on the support member 51 at a wider interval than the spinning hole 2 and in parallel with the longitudinal direction of the spinneret 3. W is wound up while spreading in the longitudinal direction of the spinneret 3. However, the interval between the guide members 59 is such that the difference between the maximum value and the minimum value of the inclination angle λ of each elastic fiber W with respect to the vertical line is 1.5 ° or less. Each guide member 59 has a groove 53 for engaging with the elastic fiber W, and a nozzle 55 for discharging oil is formed in a portion of the groove 53 where the elastic fiber W contacts. I have. As shown in FIG. 2, oil is supplied to each nozzle 55 from an oil tank 59 via a gear pump 57. Further, each nozzle 55 supplies oil to the elastic fiber W from the pressing direction of the guide member 59 for inclining the elastic fiber W, for the following reason. is there. That is, since each elastic fiber W is inclined so as to spread downward by the guide member 59, a tension acts in a direction to return to the center side of the support member 51, and the guide member 59 in this direction is acted on. Frictional force increases. Therefore, as described above, by discharging oil from the pressing direction of the guide member 59 against the elastic fiber W, the effect of reducing friction with the guide member 59 can be increased. In the present embodiment, the nozzle 55, the gear pump 57, and the oil tank 59 constitute the oiling device of the present invention.

 As shown in FIG. 2, a blower 7 is provided between the spinneret 3 and the guide member 59, and a cool air is applied to the elastic fiber W from a direction orthogonal to the arrangement direction of the elastic fibers W. Spray. Below the guide member 59, two godet rollers 9, 10 and a winding roller 12 are provided. These are arranged so as to extend in parallel with the longitudinal direction of the spinneret 3. The winding of the fiber onto the roll 60 is performed by a traverse guide (not shown) reciprocatingly moving in the axial direction of the roll 60 while guiding the fiber.

 Next, a method for producing an elastic fiber using the spinning apparatus configured as described above will be described. The polymer melted by the extruder 5 is extruded to the spinneret 3 while adjusting the supply amount by the gear pump 6, and the elastic fiber W is spun downward from each spinning hole 2. Each elastic fiber W extends downward while slightly widening the interval, and after the oil is applied by the guide member 59, the two godet rollers 9,, are arranged in the same direction as the arrangement direction of the spinning holes 2. Wound to 10 Then, after the tension is adjusted by the godet rollers 9 and 10, it is sent out to the take-up roller 12 and wound up by each roll 60.

As described above, according to the present embodiment, the arrangement direction of the spinning holes 2 of the spinneret 3 is Since they are substantially parallel to the axial directions of the dead rollers 9, 10 and the take-up roller 12, the elastic fiber W is not twisted greatly and the take-up roller 12 remains in the same arrangement as the spinning hole 2. It is wound up. Therefore, it is possible to reduce the variation in the tension between the elastic fibers due to the difference in the frictional force acting on the elastic fibers and the yarn path length as in the past, and the physical properties between the elastic fibers. Can be reduced. As a result, it is possible to provide high-quality products, for example, by preventing the occurrence of stripes and the like in the fabric even when using different positions of the mouth in the same device.

 Further, as shown in FIG. 10, the difference between the maximum value and the minimum value of the inclination angle λ between the elastic fibers by the guide member 59 is set to 1.5 ° or less, so that the elastic fibers The difference in frictional force generated between W and the guide member 59 can be reduced. Thereby, the difference in tension between the elastic fibers can be further reduced, and the physical properties of the roll can be made uniform.

 In the above embodiment, the oiling is performed at the guide member 59, but the oiling device can be separated from the guide member 59. As the oiling device, for example, a device in which an elastic fiber is brought into contact with a roll having a surface coated with oil can be used. However, it is necessary that the oil be oiled before coming into contact with the guide member 59, that is, at a position from the spinning hole 2 to the guide member 59. By doing so, it is possible to prevent the elastic fiber from being in contact with the guide member 59 in a state where the elastic fiber is not oiled and the friction coefficient is large, and it is possible to prevent the elastic fiber from being caught or damaged by the guide member. Can be prevented.

 In addition to providing one guide member for each elastic fiber as described above, for example, a thread may be formed by forming a plurality of grooves in the support member and guiding the elastic fibers in each groove. What is necessary is just to be comprised so that road deviation can be regulated.

 In the above embodiment, the present invention is applied to the case where the polyurethane elastic fiber is produced by melt spinning, but can also be applied to other methods, that is, the case of producing by a dry spinning method or a wet spinning method. It is.

Further, the present invention can be applied to other elastic fibers other than the above-mentioned polyurethane elastic fibers. Hereinafter, examples of the present invention and comparative examples related to the above-mentioned elastic fiber manufacturing apparatus will be described. In Example 5, the device shown in FIGS. 2 and 10 is used, and in Comparative Example 9, the device shown in FIGS. 11 and 12 is used.

 The spinning device 81 shown in FIGS. 11 and 12 includes a spinneret 3 formed in a row in a plurality of spinning holes 2 in a longitudinal direction, and an oiling device that guides the elastic fiber W and performs a rolling operation below the spinneret 3. 8, a blower 7 disposed between the spinneret 3 and the oiling device 8, godet rollers 63, 65, and a winding roller 69 for winding the elastic fiber W around the roll 67. Is similar to the device of FIG. However, below the oiling device 8, a guide ring 82 for guiding the elastic fiber W, godet rollers 9, 10 and a take-up roller 12 are provided, but these are used effectively for space. For this reason, the device shown in FIG. 2 differs from the device shown in FIG. 2 in that the axial direction is set at 90 ° with the longitudinal direction of the spinneret 3.

 The manufacturing apparatus 81 configured as described above manufactures polyurethane elastic fibers as follows. That is, the melted polymer is extruded from an extruder (not shown) to the spinneret 3, and the elastic fibers W are spun substantially vertically downward from the spinning holes 2. Each elastic fiber W is cooled and solidified by blowing a cool air by a blower 7, oil is applied by an oiling device 8, and then the arrangement direction of the elastic fiber W is twisted 90 ° by a guide ring 82. It is said. In this way, the tensile strength of the conductive fiber W whose orientation has been changed is adjusted via the two godet rollers 9 and 10, then sent out to the take-up roller 12, and taken up by each roll 60.

 In Example 5 and Comparative Example 9 described above, the spinning hole diameter was 0.28 mm, the spinning speed was 55 Om / min, the resin melting temperature was 200 ° C, and the elastic fiber was wound around 12 rolls. I'm wearing

 Table 5 shows the stress ST values of the polyurethane elastic fibers in Example 5 and Comparative Example 9. The stress ST value is a running tension at the time of stretching of 200% when the elastic fiber wound as described above is supplied at 15.7 m / min.

[Table 5]

 As shown in Table 5 above, in Comparative Example 9, since the average value was high, the stress S Τ value of the fibrous fiber was high overall, and the difference between the maximum value and the minimum value was large. Large variation. On the other hand, in Example 5, since the elastic fiber was not stretched so much that the bow was stretched, the stress ST value was low as a whole, and the dispersion was very small as compared with Comparative Example 9. From the above, it is apparent that the apparatus for producing broken fibers according to the present invention can provide elastic fibers that are more uniform than before.

 As apparent from the above description, according to the elastic fiber manufacturing apparatus according to the present invention, the arrangement direction of the spinning holes from which the elastic fibers are spun is substantially parallel to the axial direction of the winding roller. The elastic fiber can be wound around the winding roller without being twisted greatly, with the same arrangement as the spinning hole. Therefore, it is possible to reduce the variation in the tension between the elastic fibers due to the difference in the frictional force acting on the elastic fibers and the yarn path length as in the related art, and to reduce the difference in the physical properties between the elastic fibers. . As a result, even if a roll wound by the same manufacturing apparatus is used, it is possible to provide a high-quality product, for example, it is possible to prevent a stripe pattern or the like from being generated on the fabric. In addition, since the difference between the maximum value and the minimum value of the inclination angle of the elastic fiber with respect to the vertical line is set to 1.5 ° or less by the guide member, the difference between the elastic fiber and the guide member is generated between the elastic fibers. The difference in frictional force can be reduced. As a result, the difference in tension between the elastic fibers can be further reduced, and the physical properties of the roll can be made uniform.

 Further, since the oil agent is supplied to the elastic fibers from the pressing direction of the guide member for inclining the elastic fibers, the following effects can be obtained. That is, since the yarn path of each elastic fiber is inclined by the guide member, a tension acts in a direction to return to the original yarn path, and the frictional force with the guide member in this direction increases. Therefore, by supplying the oil agent to the elastic fiber from the pressing direction of the guide member as described above, the effect of reducing friction with the guide member can be increased.

Claims

 The scope of the claims I. A spinneret for producing a plurality of yarns, wherein a plurality of spinning holes are formed in a single spinneret plate, and the spinning holes are arranged in substantially one row. 2. The spinneret according to claim 1, which has eight or more spinning holes.  3. A plurality of spinning holes are drilled in the spinneret plate alone, and cooling air is blown in a direction substantially perpendicular to the yarn surface spun from the spinneret in which the spinning holes are arranged in substantially one row. A method for producing synthetic fibers.  4. The synthetic fiber production method according to claim 3, wherein the synthetic fiber is a melt elastic fiber. 5. The synthetic fiber according to claim 3 or 3, wherein the number of wound filaments is 1 to 3. 4. The method for producing a synthetic fiber according to 4. 6. A filter medium for removing foreign matter from the melted polymer is a spinneret provided above the spinneret, and a guide groove for guiding the molten polymer after passing through the filter medium to the spinning hole is formed. A spinneret which is characterized in that: 7. The spinneret according to claim 7, wherein the guide groove is formed radially around a spinning hole.  8. The spinneret according to claim 6, wherein the number of spinning holes is one.  9. An oiling device comprising: an oiling sound 15 material for oiling elastic fibers; and a guide member for guiding the elastic fibers to the oiling member, wherein the oiling member guides the elastic fibers. A groove portion; an oil supply hole formed in the groove portion for oiling elastic fibers passing through the groove portion; an apex portion having a vertical line as a tangent; and a vertical line extending from the vertex portion to the vertical line. An upper slope and a lower slope having an angle of receding with respect to the guide member, wherein the elastic fiber on the downstream side from the vertex is larger than 0 ° with respect to a vertical line from the vertex and 3 °. An oiling device for elastic fibers, wherein the oiling device is arranged so as to make the following receding angles.  10. The elastic fiber oiling device according to claim 9, wherein a groove width of a narrowest portion adjacent to the apex portion is 0.1 to 1.5 mm. II. The surface roughness near the vertex of the oiling member and the guide member is 2 10. Oil for elastic fibers according to claim 9, wherein S is l0 S. 12. The elastic fiber oiling device according to claim 9, wherein the number of filaments of the elastic fiber is 2 or less, and the total fineness is 88 or less. 13. The elastic fiber oiling device according to claim 9, wherein the elastic fiber is a melt-spun elastic fiber.  1 4. An apparatus for producing an elastic fiber, comprising: a spinneret having a plurality of spinning holes; and a take-up roller for winding an elastic fiber spun from the spinning hole, wherein the plurality of spinning holes form a line. An apparatus for producing elastic fibers, wherein the arrangement direction and the axial direction of the winding roller are substantially parallel to each other.  15. A guide member disposed between the spinning hole and the winding roller, the guide member guiding the elastic fiber spun from the spinning hole substantially vertically downward to the winding roller, The members are disposed at intervals larger than the arrangement interval of the spinning holes, and the inclination angle of the elastic fiber from the spinning hole to the guide member, which is caused by the difference in the arrangement interval, with respect to a vertical line. 15. The elastic fiber manufacturing apparatus according to claim 14, wherein a difference between the maximum value and the minimum value is set to be equal to or less than 1.5 °. 16. An oiling device that is disposed at a position from the spinning hole to the guide member and that oils the elastic fiber from a pressing direction of the guide member for inclining the elastic fiber is further provided. 16. The apparatus for producing an elastic fiber according to claim 15, wherein the apparatus is provided. 17. Winding fibers spun from a spinneret having a plurality of spinning holes arranged side by side in a row are wound by a winder having a rotation axis substantially parallel to the direction in which the spinning holes are arranged. A method for producing an elastic fiber, comprising: 18. A guide member is disposed between the spinneret and the take-up roller at an interval wider than the interval between the spinning holes, and the guide member guides the elastic fiber to the take-up roller substantially vertically downward. In addition, regarding the inclination angle of the elastic fiber with respect to the vertical line from the spinning hole to the guide member, which is caused by the difference in the arrangement interval between the spinning hole and the guide member, a maximum value and a maximum angle 18. The method for producing an elastic fiber according to claim 17, wherein the difference from the small value is 1.5 ° or less.  The portion from the spinneret to the guide member, wherein oiling is performed on the elastic fiber from a pressing direction of the guide member for inclining the elastic fiber. Elastic fiber