Warm-keeping dazzling black fiber, spinneret plate for preparing warm-keeping dazzling black fiber and production method

Abstract

The invention discloses a warm-keeping dazzling black fiber which comprises a monofilament main body with a triangular section and a circular hollow through hole formed in the middle of the monofilament main body, and the warm-keeping dazzling black fiber enlarges a reflective surface through the monofilament main body with the triangular section; through the circular hollow through hole structure, the fiber fabric woven by the monofilament main body has a heat preservation effect. The probability that light is completely absorbed by fibers can be increased, so that under the same content of master batches, the fibers are correspondingly black in color and better in warm keeping effect, and fiber fabric has a good reflection effect and a good heat preservation performance, is excellent in heat preservation performance and has a straight effect.

Description

Technical Field

[0001] The invention relates to the field of fiber technology, and in particular to a warm and black fiber, a spinneret for preparing the fiber, and a production method. Background Art

[0002] Polyester fiber has excellent textile properties and wearing properties, such as crisp appearance, creep resistance, fatigue resistance, friction resistance, corrosion resistance, and is known for being iron-free and durable. It is widely used in home textiles, clothing, and industrial use. However, since the polyester molecular chain contains fewer polar groups and no color-absorbing groups, and the structure is highly regular, the molecules are closely arranged, and the crystallinity is high, the dyeability is poor. Therefore, it is of great significance to study and improve the dyeing of polyester fibers. At present, there are two ways to color polyester fibers: one is to perform corresponding dyeing after spinning, that is, the method of coloring after spinning. The other is to perform corresponding coloring before spinning, that is, the method of pre-spinning solution coloring.

[0003] The post-spinning fiber coloring method refers to dyeing white fibers with dyes after melt spinning into fibers. However, due to the poor dyeability of polyester fibers, disperse dyes are usually used for dyeing under high temperature and high pressure or with a carrier. When dyeing at high temperature and high pressure, a small amount of oligomers contained in the polyester fibers can easily diffuse from the fibers to the surface and even enter the dye solution, forming a viscous substance in the dye solution, which brings a lot of trouble to dyeing and post-processing and consumes a lot of energy.

[0004] The solution dyeing method refers to the process of directly adding masterbatch online for melt spinning during the preparation of polyester fibers. This method can fix the dye molecules in the polyester fibers, thereby improving the color fastness of the colored silk. At the same time, with people's increasing requirements for the appearance and color of fabrics, and the society's call for energy conservation and emission reduction, the production of colored silk by the solution dyeing method has become an important direction for the transformation and upgrading of enterprises. In addition, the cross-section of the fiber can improve the optical properties of the fiber, thereby improving the dyeing performance. At the same time, the fibers with special cross-section shapes are transparent, bright, and have a flashing property, which can improve the brightness of the solution-dyed fibers, and the specific surface area of ​​the special cross-section fibers with the same linear density increases, so the dyeing speed will also be accelerated, which has enabled various companies to accelerate the research and development of solution-dyed special-shaped fibers.

[0005] As the colored polyester with the largest output, black polyester has a wide range of applications. In particular, black polyester with a soft touch, gentle luster and warmth retention is used as high-end automotive interior material for sports and luxury models.

[0006] Since carbon black is similar to a perfect black body and completely absorbs light, the more light is absorbed, the darker the fiber color becomes. Although the current triangular cross-section black fiber can store a certain amount of heat from incident light, it also has the problem of easy dissipation, making it difficult to improve the heat storage function of the black fiber itself, so that the fabric woven with black fiber cannot achieve a better warmth-keeping effect. Therefore, the fiber itself needs to be improved.

[0007] At the same time, since the fiber itself has a special-shaped cross-section and after adding carbon black masterbatch, it is easy to cause the strength of the tow to decrease and breakage due to excessive tension or friction during spinning, resulting in problems such as hairy yarns, floating yarns, and loose yarns. In order to solve the above problems, it is necessary to increase the oiling rate to improve the bundling, thereby reducing loose yarns. However, due to the special-shaped cross-section, the tow has a large specific surface area, resulting in relatively poor permeability of the oil agent. When the actual oil content of the tow is too high, it is easy to have more oil agent on the outer layer of the tow and less oil agent on the inner layer of the fiber, which makes it easy to be uneven when oiling, increases friction with porcelain parts, and produces single filament breakage, loose yarns, etc. When black fiber is used as automotive interior, it is also prone to color changes after long-term exposure to the sun, so it is necessary to improve the existing black fiber production process. Summary of the invention

[0008] In order to solve certain technical problems existing in the prior art, one of the purposes of the present application is to provide a warm and dazzling black fiber, which can increase the probability of light being completely absorbed by the fiber, so that the fiber color is correspondingly darker at the same masterbatch content, and the warming effect is better, so that the fiber fabric has both good reflective effect and good thermal insulation performance, excellent thermal insulation performance and a straight effect.

[0009] The second purpose of the present application is to provide a spinneret for preparing the warm and cool black fiber, which can effectively solve the problem of the difficulty in producing hollow triangular black fibers and improve the fiber's warmth retention and heat storage performance.

[0010] It can effectively solve the problem of difficult production of hollow triangular black fibers.

[0011] The third purpose of this application is to provide a method for producing warm and cool black fibers, which improves on the original process conditions and effectively solves the problems of uneven distribution of oil in existing black fibers, a large number of hairy and floating fibers, and waste of oil, with low improvement costs.

[0012] In order to solve the above existing technical problems, one of the purposes of this application is achieved by adopting the following technical solution: A warm and shiny black fiber comprises a monofilament body with a triangular cross-section and a circular hollow through hole arranged in the middle of the monofilament body. The warm and shiny black fiber increases the reflective surface through the monofilament body with a triangular cross-section, and the circular hollow through hole structure makes the fiber fabric woven from the monofilament body have a thermal insulation effect.

[0013] Preferably, each vertex of the monofilament body is provided with a leaf length extending outwards.

[0014] Preferably, the leaf length is 0.8±0.1 mm.

[0015] Preferably, the ratio of the length to the width of the leaf is 7-8:1.

[0016] The second purpose of this application is achieved by the following technical solution: A spinneret for preparing the thermal insulation and black fiber comprises a spinneret body and a plurality of spinneret holes arranged on the spinneret body, each of the spinneret holes is composed of three Y-shaped channels, the three channels constituting the spinneret holes are arranged in a triangular shape, the inner side surfaces of the three channels are arc-shaped surface structures distributed in a circular shape, and the fibers sprayed out from two adjacent channels are connected to each other after melt expansion to form the thermal insulation and black fiber.

[0017] The third purpose of this application is achieved by the following technical solution: A method for producing warm and shiny black fiber, the method comprising: mixing polyester and carbon black masterbatch raw materials through a dynamic mixer, and then sequentially passing through a booster pump, a spinning assembly including a spinneret for extrusion, cooling and molding, oiling, a guide hook, a GR1 guide roller, a GR2 guide roller, and winding to obtain the warm and shiny black fiber, wherein a first pre-network is provided in front of the guide disk of the GR1 guide roller.

[0018] Preferably, the pre-network pressure of the first pre-network is 0.08-0.09Mpa.

[0019] Preferably, a second pre-network is provided in the guide disc of the GR2 guide roller.

[0020] Preferably, the pre-networking pressure of the second pre-networking is 0.09-0.10 MPa.

[0021] Preferably, 5-8% of an anti-hydrolysis agent is added to the oil used in the oiling process, and the added anti-hydrolysis agent provides the polyester fiber with better temperature resistance and the oil has anti-aging properties.

[0022] Preferably, the anti-hydrolysis agent is a glycidyl ether epoxy compound hydrolysis stabilizer.

[0023] Preferably, the monofilament body extruded through the spinning assembly is cooled by ring blowing.

[0024] Preferably, the ring-blowing bellows for cooling and forming is provided with a cooling device.

[0025] Preferably, the cooling and temperature reduction device is arranged on the air inlet pipe or the inlet of the ring blowing air box of the cooling and molding process, and the temperature of the air after being cooled by the cooling and temperature reduction device is 15~17°.

[0026] Preferably, the oil nozzle in the oiling step is provided with two oil outlet holes, and an oil storage hole is provided below each of the oil outlet holes.

[0027] Preferably, the specification of the warm and black fiber is 150-300dtex / 144f, the carbon black masterbatch content is ≥8.0% and ≤10.0%, the dyeing degree is ≥4.5, the breaking strength is ≥2.35cN / dtex, the elongation at break is 145±3%, the CV value of the yarn unevenness is ≤1.1%, the oil content is 0.50±0.05%, the degree of special shape is ≥50%, and the excellent rate is above 97%.

[0028] Compared with the prior art, the present invention has the following beneficial effects: The cross-sectional shape of the monofilament main body of the black fiber is an outer triangular outline and a circular hollow through-hole structure. The outer triangular shape of the monofilament main body can increase the reflective surface of the fiber, making it have a larger reflective surface, and the hollow structure of the internal circular hollow through-hole can make the fiber fabric have a thermal insulation effect. Such a fiber fabric has both good reflective effect and good thermal insulation performance, and the circular hollow structure can make the fiber have a higher modulus, and the fabric has a better gloss, excellent thermal insulation performance and a straight effect. Especially for the warm and dazzling black fiber, which is close to a completely black body, carbon black itself completely absorbs light. The more light is absorbed, the darker the fiber color. The triangular cross-section makes the incident light inside the fiber have the longest optical path, which can increase the probability of complete absorption of light, so that the fiber color is correspondingly darker and the thermal insulation effect is better at the same masterbatch content. At the same time, the use of a hollow cross-section increases still air, thereby improving thermal insulation performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of a cross section of a fiber of the present invention; Figure 2 It is a schematic diagram of the spinneret surface in the present invention; Figure 3 It is a structural schematic diagram of the spinneret hole in the present invention; Figure 4 is a process flow chart of the present invention; Figure 5 It is a schematic diagram of the cross-sectional structure of the oil nozzle in the oiling step of the present invention; In the figure: 1. circular hollow through hole; 2. monofilament body; 3. leaf length; 4. spinneret body; 5. spinneret hole; 6. oil nozzle; 7. oil outlet hole; 8. oil storage hole. DETAILED DESCRIPTION

[0030] Below, the present application is further described in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0031] In the description of the present application, it should be understood that the terms "up", "down", "left", "right", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0032] The terms "first", "second", etc. in this application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship. Embodiment 1:

[0033] like Figure 1 As shown, a warm and shiny black fiber includes a monofilament main body 2 with a triangular cross-section and a circular hollow through hole 1 arranged in the middle of the monofilament main body 2. The warm and shiny black fiber increases the reflective surface through the monofilament main body 2 with a triangular cross-section, and the fiber fabric woven with the monofilament main body 2 has a thermal insulation effect through the circular hollow through hole 1 structure.

[0034] The cross-sectional shape of the monofilament body 2 of the black fiber is an outer triangular outline and a circular hollow through hole 1. The outer triangular monofilament body 2 can increase the reflective surface of the fiber, making it have a larger reflective surface, and the hollow structure of the internal circular hollow through hole 1 can make the fiber fabric have a thermal insulation effect. Such a fiber fabric has both good reflective effect and good thermal insulation performance, and the circular hollow structure can make the fiber have a higher modulus, and the fabric has a better gloss, excellent thermal insulation performance and a straight effect. Especially for the warm and dazzling black fiber in which carbon black is close to a completely black body, it completely absorbs light. The more light is absorbed, the darker the fiber color. The triangular cross section makes the incident light inside the fiber have the longest optical path, which can increase the probability of the light being completely absorbed, so that the fiber color is correspondingly darker and the thermal insulation effect is better at the same masterbatch content. At the same time, the use of a hollow cross section increases the still air, thereby improving the thermal insulation performance.

[0035] A further improvement is that each vertex of the monofilament body 2 is provided with a leaf length 3 extending outward.

[0036] A fiber main body is extended outward from each vertex of the monofilament main body 2 with a triangular cross section to form a leaf length 3, which can make the fiber more profiled and have better warmth retention.

[0037] A further improvement is that the leaf length 3 is 0.8±0.1 mm; and the ratio of the length to the width of the leaf length 3 is 7~8:1.

[0038] Since the profile of the monofilament can improve the diffuse reflection effect of the fiber on light, the profile of the fiber will increase with the increase of the length and width ratio of the leaf length 3. However, when the length and width ratio of the leaf length 3 increases to a certain extent, the flow rate of the polyester in the spinneret hole 5 will be reduced, resulting in spinning breakage. When the length and width ratio is 7~8:1, the profile can be guaranteed to be ≥50%. Embodiment 2:

[0039] like Figure 2 and Figure 3 As shown, a spinneret for preparing the heat-retaining and black fiber comprises a spinneret body 4 and a plurality of spinneret holes 5 arranged on the spinneret body 4, each of the spinneret holes 5 is composed of three Y-shaped channels, the three channels constituting the spinneret holes 5 are arranged in a triangular shape, and the inner side surfaces of the three channels are arc-shaped surface structures distributed in a circular shape, and the fibers sprayed out from two adjacent channels are connected to each other after melt expansion to form the heat-retaining and black fiber.

[0040] Since the heat-retaining and dazzling black fiber is a triangular hollow structure with a leaf length of 3, the existing triangular spinneret is difficult to produce. Therefore, the spinneret hole 5 on the spinneret is improved, wherein each spinneret hole 5 on the spinneret is composed of three through holes similar to a Y-shaped structure, and the three through holes are arranged in a triangular shape. After spinning, the two corners of the Y-shaped fiber are connected to each other after expansion to form an outer triangular shape and an inner circular hollow shape of the heat-retaining and dazzling black fiber, thereby effectively solving the problem of the difficulty in producing the heat-retaining and dazzling black fiber. The mechanism of the spinneret innovation is as follows: 1. The cross-section shape of the monofilament is an outer triangle and an inner circular hollow shape. The outer triangle shape is mainly because the fiber has a large reflective surface, and the inner circular hollow structure can make the fiber fabric have a thermal insulation effect. Such a fiber fabric has both good reflective effect and good thermal insulation performance. Moreover, the circular hollow structure can make the fiber have a higher modulus, and the fabric has a better gloss, excellent thermal insulation performance and a straight effect.

[0041] Second, carbon black is similar to a completely black body and completely absorbs light. The more light is absorbed, the darker the fiber color is, and the better the warmth retention is, especially when a triangular hollow cross-section is used. When light enters the triangular hollow fiber cross-section, it is easier to be incident and reflected to the carbon black particles, increasing the light absorption rate, thereby improving warmth retention. Embodiment 3:

[0042] like Figure 4 As shown, a method for producing warm and shiny black fiber comprises: mixing polyester and carbon black masterbatch raw materials through a dynamic mixer, and then passing through a booster pump, a spinning assembly including a spinneret for extrusion, cooling and molding, oiling, a guide hook, a GR1 guide roller, a GR2 guide roller, and winding to obtain the warm and shiny black fiber, wherein a first pre-network is provided in front of the guide plate of the GR1 guide roller; the specification of the warm and shiny black fiber is 150-300dtex / 144f, the carbon black masterbatch content is ≥8.0% and ≤10.0%, the dyeing degree is ≥4.5, the breaking strength is ≥2.35cN / dtex, the breaking elongation is 145±3%, the CV value of the strip unevenness is ≤1.1%, the oil content is 0.50±0.05%, the degree of special shape is ≥50%, and the excellent rate is above 97%.

[0043] Since the warm and cool black fiber has a special-shaped cross-section and a large specific surface area of ​​the yarn bundle, the permeability of the oil agent is relatively poor. When the fiber has a special-shaped cross-section and the actual oil content of the yarn bundle is too high, it is easy for the outer layer of the yarn bundle to have more oil and the inner layer of the fiber to have less oil. Because the cross-sectional shape affects the uneven distribution of the oil agent, usually the specific surface area of ​​the fiber with a special-shaped cross-section is larger than that of the fiber with a circular cross-section, which makes it easy for the oiling to be uneven. At the same time, the bundling of the fiber with a special-shaped cross-section is poor, which further makes the oil distribution uneven. Therefore, in order to reduce the problem of loose loops of the special black fiber, it is necessary to increase the oiling rate and improve the bundling, thereby reducing the loose loops. The invention adds a first pre-network in front of the guide disc of the GR1 wire guide roller to "penetrate" the oil agent into the inner part of the yarn bundle, thereby solving the problem of a large amount of oil agent accumulating on the surface of the fiber. The oil will be scraped directly when passing through the wire guide hook, resulting in a decrease in the actual oil content and a large amount of oil waste.

[0044] A further improvement is that the pre-network pressure of the first pre-network is 0.08-0.09Mpa.

[0045] The reason why the first pre-network uses an air pressure of 0.08-0.09Mpa is that if the pre-network air pressure is too high, the oil on the surface of the tow will be easily blown away, resulting in a decrease in the actual oil content. At the same time, due to excessive air pressure, the tow will be easily blown from the center of the pre-network device to the edge of the pre-network device, increasing the friction with the porcelain parts, resulting in single-filament breakage, loose loops, etc. If the pre-network air pressure is too low, the tow will not be blown away, and the oil will not penetrate. Therefore, it is necessary to accurately control the first pre-network pressure added in front of the GR1 guide disc. When the pre-network pressure is 0.08-0.09Mpa, the above problems can be effectively avoided. A further improvement is that a second pre-network is provided in the guide disc of the GR2 guide roller.

[0046] Since the fiber has a special-shaped cross-section and carbon black masterbatch is added, it is easy to cause the strength of the tow to decrease and breakage due to excessive tension or friction during spinning, resulting in problems such as hairy yarns, floating yarns, and loose yarns. Therefore, in order to reduce the problem of loose yarns in special black fibers, it is necessary to reduce the problems of floating yarns and loose yarns while increasing the oiling rate and improving the bundling. In order to solve the above problems, in addition to adding the first pre-network in front of the guide disc of the GR1 wire guide roller, it is also necessary to add a second pre-network in the guide disc of the GR2 wire guide roller, that is, adding a pre-network in front of the guide disc of the GR1 wire guide roller and in the guide disc of the GR2 wire guide roller, which can effectively reduce the occurrence of floating yarns and loose yarns.

[0047] A further improvement is that the pre-networking pressure of the second pre-networking is 0.09-0.10Mpa.

[0048] Because some floating silks are easily absorbed in normal silk bundles after being oiled, the pre-network pressure of the second pre-network is 0.09-0.10Mpa, the purpose of which is to blow away the small floating silks absorbed in the silk bundles.

[0049] Preferably, 5-8% of an anti-hydrolysis agent is added to the oil used in the oiling process, and the added anti-hydrolysis agent provides the polyester fiber with better temperature resistance and the oil has anti-aging properties.

[0050] Since the fiber is mainly used in car interiors, it is easy to change color after long-term exposure to the sun. The anti-hydrolysis agent can provide polyester fiber with better temperature resistance and improve the anti-aging performance of the oil. Among them, excessive use of anti-hydrolysis agent will cause the product to have poor bundling, resulting in more filaments in the polyester fiber during the extrusion process and decreased physical index performance; if the amount of anti-hydrolysis agent is too little, it will not have the effect of improving the temperature resistance and moisture and heat resistance. Therefore, the increase ratio of anti-hydrolysis agent needs to be controlled between 5-8%. When 5-6% is used, the effect is stable and the amount added is less.

[0051] A further improvement is that the anti-hydrolysis agent is a glycidyl ether epoxy compound hydrolysis stabilizer.

[0052] The anti-hydrolysis agent adopts a glycidyl ether epoxy compound hydrolysis stabilizer, which generates a hydroxyl group through the reaction of the epoxy group with the carboxyl group produced by hydrolysis, thereby inhibiting the catalytic effect of the carboxyl group on hydrolysis; the epoxy group also reacts with the hydroxyl group to reconnect the broken chains produced by hydrolysis.

[0053] A further improvement is that the monofilament body 2 extruded through the spinning assembly is cooled by ring blowing.

[0054] Since the monofilament body 2 is a special-shaped fiber, conventional side-blowing cooling may easily cause uneven cooling and deformation. Therefore, a ring-blowing bellows is used for ring-blowing cooling during cooling and forming, which is more uniform than conventional side-blowing cooling.

[0055] A further improvement is that a cooling device is provided on the ring-blowing air box for cooling and forming.

[0056] Since the monofilament main body 2 is a special-shaped fiber, a fast cooling speed is required to improve the degree of special shape, and it must be uniform. Therefore, lower requirements are placed on the temperature of the ring-blowing air in the air duct. Because it is a special black silk, a large amount of heat is easily released during the ring-blowing air cooling, resulting in a problem of temperature rise. Therefore, a cooling and cooling device is installed on the ring-blowing air box. The cooling and cooling device can achieve a cooling and cooling effect, which can effectively solve the problem of unstable special shape of the monofilament main body 2.

[0057] A further improvement is that the cooling and temperature reduction device is arranged on the air inlet pipe or the inlet of the ring blowing air box of the cooling and molding process, and the temperature of the air after being cooled by the cooling and temperature reduction device is 15~17°.

[0058] The cooling device can use a water pipe to transport condensed water for cooling, or it can use a condenser and other equipment to cool the supply air, thereby achieving control of the inner ring blowing temperature of the cooling molding process.

[0059] As a further improvement, the oil nozzle 6 in the oiling step is provided with two oil outlet holes 7 , and an oil storage hole 8 is provided below each of the oil outlet holes 7 .

[0060] In the oiling step, the oil nozzle 6 often encounters the problem of oil scraping due to incomplete penetration when oiling the filament bundle from the oil outlet hole 7. Therefore, an inwardly recessed oil storage hole 8 is formed under each oil outlet hole 7. The oil storage hole 8 can be used to scrape off the non-penetrated oil and perform secondary oiling. Therefore, the improvement of the oil nozzle 6 effectively reduces the occurrence of oil scraping and makes the oiling effect more ideal.

[0061] The above-mentioned implementation modes are only preferred implementation modes of the present application and cannot be used to limit the scope of protection of the present application. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present application shall fall within the scope of protection required by the present application.

Claims

1. A warm black fiber, characterized by: The invention comprises a monofilament body (2) with a triangular cross section and a circular hollow through hole (1) arranged in the middle of the monofilament body (2); the heat-retaining black fiber increases the reflective surface through the monofilament body (2) with a triangular cross section; and the fiber fabric woven with the monofilament body (2) has a heat-retaining effect through the structure of the circular hollow through hole (1).

2. The warm and cool black fiber according to claim 1, characterized in that: Each vertex of the monofilament body (2) is provided with a leaf length (3) extending outward; the length-to-width ratio of the leaf length (3) is 7:

1.

3. A spinneret for preparing the warm and black fiber as claimed in claim 1 or 2, characterized in that: It comprises a spinneret body (4) and a plurality of spinneret holes (5) arranged on the spinneret body (4), each of the spinneret holes (5) is composed of three Y-shaped channels, the three channels constituting the spinneret holes (5) are arranged in a triangular shape, the inner side surfaces of the three channels are arc-shaped surface structures distributed in a circular shape, and the fibers ejected from two adjacent channels are connected to each other after melt expansion to form the heat-retaining black fibers.

4. A method for producing a heat-retaining black fiber, the method comprising: The polyester and carbon black masterbatch raw materials are mixed by a dynamic mixer, and then sequentially passed through a booster pump, a spinning assembly including a spinneret as described in claim 3 for extrusion, cooling and molding, oiling, a guide wire hook, a GR1 guide wire roller, a GR2 guide wire roller, and winding molding to obtain the warm and dazzling black fiber as described in claim 1, characterized in that a first pre-network is provided in front of the guide disk of the GR1 guide wire roller.

5. The method for producing the warm black fiber according to claim 4, characterized in that: The guide disc of the GR2 wire guide roller is provided with a second pre-network.

6. The method for producing the warm and shiny black fiber according to claim 4, characterized in that: In the oiling process, 5-8% of an anti-hydrolysis agent is added to the oil agent, and the added anti-hydrolysis agent provides the polyester fiber with better temperature resistance and the oil agent has anti-aging performance.

7. The method for producing the warm black fiber according to claim 4, characterized in that: The monofilament body (2) extruded through the spinning assembly is cooled by ring blowing.

8. The method for producing the warm black fiber according to claim 7, characterized in that: The cooling and forming ring-blowing bellows is provided with a cooling and temperature reduction device; the cooling and temperature reduction device is arranged on the air inlet pipe of the cooling and forming process or the inlet of the ring-blowing bellows, and the air temperature after being cooled by the cooling and temperature reduction device is 15~17°.

9. The method for producing the warm and shiny black fiber according to claim 4, characterized in that: The oil nozzle (6) in the oiling step is provided with two oil outlet holes (7), and an oil storage hole (8) is provided below each of the oil outlet holes (7).

10. The method for producing the warm black fiber according to claim 4, characterized in that: The specifications of the warm and black fiber are 150-300dtex / 144f, the carbon black masterbatch content is 8.0%~10.0%, the dyeing degree is ≥4.5, the breaking strength is ≥2.35cN / dtex, the breaking elongation is 145±3%, the CV value of the yarn unevenness rate is ≤1.1%, the oil content is 0.50±0.05%, the degree of special shape is ≥50%, and the excellent rate is ≥97%.

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