Production equipment and preparation method of double-twist-direction high-shrinkage delustering fiber

Abstract

The invention discloses production equipment for double-twist-direction high-shrinkage delustering fiber, which comprises a POY (pre-oriented yarn) raw yarn frame, an FDY (fully drawn yarn) raw yarn frame, a double-yarn-path elasticizer, a first hot box, a cooling plate, a second hot box, a false twister, a network device, a plurality of rollers, an oiling oil wheel and a winding forming device, the first hot box, the cooling plate, the second hot box, the false twister, the network device, the rollers, the oiling oil wheel and the winding forming device are arranged on the double-yarn-path elasticizer, a full-delustering POY spinning cake is arranged on the POY raw yarn frame, the FDY raw yarn frame is provided with an FDY spinning cake, and the full-delustering POY spinning cake is arranged on the FDY raw yarn frame. A yarn guide and a bypass yarn tube are arranged between the FDY raw yarn frame and the interlacer, FDY tows on the FDY raw yarn frame enter the bypass yarn tube after being suspended through the yarn guide, the FDY tows are led into the interlacer through the bypass yarn tube to be wound and wrapped, the double-yarn-channel elasticizer can carry out false twisting on the two full-dull POY tows at the same time, and the two full-dull POY tows are made to be uniform. The two full-dull POY tows subjected to false twisting are wound and wrapped outside the FDY tows through a network device. The problem that an existing double-yarn-path type elasticizer is difficult to achieve three-yarn blending can be solved, the blended fiber has high contractibility, and the exterior of the blended fiber further has a good full-dull effect.

Description

Technical Field

[0001] The invention relates to the technical field of a method for preparing a matte fiber, and in particular to a method for preparing a double-twisted high-shrinkage matte fiber. Background Art

[0002] The current Hongyuan HY-7HLV texturing machine has only two wire paths. When blending matte fibers, it can generally only blend matte POY tows with matte POY tows, or blend matte POY tows with FDY tows. When blending matte POY tows with POY tows, the formed fibers are relatively stiff and have insufficient shrinkage. Although the fibers formed by blending matte POY tows with FDY tows have certain shrinkage and matte effects, they use a false twister with residual torque, resulting in poor flatness of the fabric. At the same time, after elastic stretching, the internal FDY tows are easily exposed from the gaps of the matte POY tows, making it difficult to achieve the purpose of truly matte fabrics. Due to the limitations of the Hongyuan HY-7HLV texturing machine itself, it is difficult to blend more than two tows with the existing process. Summary of the invention

[0003] In order to solve certain technical problems existing in the prior art, one of the purposes of the present application is to provide a production equipment for double-twist high-shrinkage matte fiber, which can solve the problem that the existing double-wire type texturing machine is difficult to achieve three-wire blending, so that the blended fiber not only has high shrinkage, but also has a good full matte effect on the outside.

[0004] The second purpose of the present application is to provide a method for preparing double-twisted high-shrinkage matte fiber.

[0005] In order to solve the above existing technical problems, this application adopts the following technical solutions:

[0006] A production equipment for double-twist high-shrinkage matte fiber, comprising a POY raw yarn rack, an FDY raw yarn rack, a double-wire-path texturing machine, a first heat box, a cooling plate, a second heat box, a false twister, a network device, a plurality of rollers, an oiling oil wheel and a winding and forming device, characterized in that: the POY raw yarn rack is provided with a high-F full-matte POY yarn cake, the FDY raw yarn rack is provided with a high-shrinkage FDY yarn cake, a yarn guide and a bypass yarn tube are provided between the FDY raw yarn rack and the network device, the high-shrinkage FDY yarn bundle on the FDY raw yarn rack is suspended through the yarn guide and enters the bypass yarn tube outside the second heat box, the high-shrinkage FDY yarn bundle is introduced into the network device through the bypass yarn tube for winding and wrapping, the double-wire-path texturing machine can simultaneously false-twist two full-matte POY yarn bundles, and the two full-matte POY yarn bundles after false twisting are wound and wrapped outside the FDY yarn bundle through the network device.

[0007] On the basis of the original Hongyuan HY-7HLV texturing machine, an FDY raw yarn rack is added through a yarn guide and a bypass yarn tube, so that the high-shrinkage FDY yarn bundle on the FDY raw yarn rack is suspended through the yarn guide and enters the bypass yarn tube outside the second hot box. The high-shrinkage FDY yarn bundle is introduced into the network device through the bypass yarn tube and wrapped with two high-F full-dull POY yarn bundles after false twisting, so as to realize the three-filament blending operation, and the high-F full-dull POY yarn is used as the wrapping yarn, and the high-shrinkage FDY yarn bundle is used as the core yarn, which can make the blended fiber not only have the high shrinkage performance of the FDY yarn, but also have a good full-dull effect on the outside. The double-twisted high-shrinkage dull fiber is mainly woven on water-jet and air-jet looms. After the subsequent dyeing and finishing, the yarn core shrinks, and the full-dull POY wrapped on the outside protrudes on the surface, and the cloth surface presents a three-dimensional and thick feeling. In addition, due to the physical properties of full matte POY, the fabric has a matte color, achieving a refreshing visual effect. The finished fabric is mainly used for curtain fabrics and other fabrics after post-dyeing and finishing. Because the product has strong tightening properties, the fabric surface is thicker. In addition, the full matte property makes the fabric have a matte color, a higher grade, and the shading effect better meets the needs of modern young people for curtain fabrics.

[0008] Preferably, the discharge end of the cooling plate is provided with a false twister for S twist and a false twister for Z twist, and the two fully matte POY tows are respectively false-twisted by the false twister for S twist and the false twister for Z twist to form one with residual torque in clockwise twist and one with residual torque in counterclockwise twist, and the two fully matte POY tows wound around the outside of the FDY tow are offset by the false twister for S twist and the false twister for Z twist during wrapping to achieve residual torque.

[0009] When two high F full-dull POY yarns come out of the cooling plate and enter the false twister for false twisting before entering the next roller for plying, the tow formed by the false twister with a single-filament path is a single-way structure, and it is difficult to eliminate the residual torque. Therefore, an S-twist false twister and a Z-twist false twister are set at the discharge end of the cooling plate. The two high F full-dull POY yarns are respectively false-twisted by the S-twist false twister and the Z-twist false twister to form a residual torque of clockwise twist and a residual torque of counterclockwise twist, so that the residual torques of the two high F full-dull POY yarns offset each other after plying, achieving the effect of zero torque, so that the two high F full-dull POY yarns wrapped outside the high-shrinkage FDY yarn tows no longer have torque when wrapped, and have better firmness, higher fit and better uniformity when in the network.

[0010] Preferably, the wire guide is a rotary wire guide.

[0011] When the high-shrinkage FDY tow is incorporated, the existing yarn guide is prone to uneven tension. Therefore, it is replaced with a rotary yarn guide. The rotary yarn guide can solve the problem of uneven tension when the high-shrinkage FDY tow is incorporated.

[0012] Preferably, an anti-stiffness device is provided on the roller adjacent to the POY raw yarn rack.

[0013] Since two high-F full-dull POY tows need to pass through the roller adjacent to the POY raw yarn rack at the same time, the full-dull POY tows cause serious wear on the leather roller, resulting in some spindles being transparent but not compacted, which easily leads to insufficient stretching and stiff yarn problems during the production process. In order to ensure the stability between the two high-F full-dull POY tows and the rollers, an anti-stiffness device is installed on the wire moving device in front of one roller, which greatly improves the uniformity of the tow stretching, thereby effectively avoiding the occurrence of the above-mentioned problems.

[0014] Preferably, the hot rails in the first hot box are cleaned with a hot box cleaning agent and then sprayed with a layer of alkaline talcum powder.

[0015] Since high F full-dull POY tow is prone to produce tar when heated in the hot box, resulting in a relatively short production cycle, the hot rail in the first hot box needs to be cleaned with a hot box cleaner during each maintenance, and then a layer of alkaline talcum powder is sprayed to ensure production stability.

[0016] A method for preparing a double-twisted high-shrinkage matte fiber, characterized in that the method for preparing the double-twisted high-shrinkage matte fiber comprises:

[0017] S1, two high F full-dull POY tows on the POY raw yarn rack are simultaneously pulled by a roller and then respectively enter the first heat box for heating, and the two high F full-dull POY tows heated by the first heat box are cooled by a cooling plate and then respectively passed through an S-twist false twister and a Z-twist false twister for false twisting;

[0018] S2, after false twisting, the two fully matte POY tows are drawn by the second roller again, and then heated by the auxiliary roller and the second heat box in turn before entering the network device;

[0019] S3, a high shrinkage FDY tow after passing through the zero roller enters the network device on the texturing machine through an external bypass yarn tube, and the high shrinkage FDY tow is used as the yarn core. Two high F full-dull POY tows are wrapped around the outside of the high shrinkage FDY tow through the network nozzle in the network device to form a double-twisted dull fiber;

[0020] S4, the double-twist matte fiber in step S3 is pulled by three rollers and oiled by an oiling tanker, and then enters a winding device for winding. After the winding is completed, the double-twist high-shrinkage matte fiber is quality inspected, packaged, and stored in a warehouse.

[0021] Preferably, the single-filament F number of the fully matte POY tow is not less than 144, the boiling water shrinkage of the FDY tow is greater than 30%, and the boiling water shrinkage of the double-twisted high-shrinkage matte fiber is greater than 6.5%.

[0022] Preferably, the curl shrinkage rate of the double-twisted high-shrinkage matte fiber is greater than 11%.

[0023] Preferably, the oiling rate of the oiling wheel on the double-twisted high-shrinkage matte fiber is 3.50-4.00%.

[0024] Preferably, the aperture of the network chip in the network device is 1.6, the network air compressor is controlled at 3.5 bar, and the network density generated by the network device is ≥120 / m.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] By adding a yarn guide and a bypass yarn tube, the existing Hongyuan HY-7HLV type texturing machine can realize the operation of three-filament blending, and the high F full-dull POY yarn is used as the wrapping yarn, and the high-shrinkage FDY yarn is used as the core yarn, so that the blended fiber not only has the high shrinkage performance of the FDY yarn, but also has a good full-dull effect on the outside. The full-dull POY and semi-dull FDY blended fibers, the woven terminal finished product has both the excellent characteristics of FDY high shrinkage and the matte color of full-dull. The finished fabrics woven in the later stage are widely used in the production of curtain fabrics, etc. due to their unique style and superior quality. At the same time, the double-twist high-shrinkage dull fiber is mainly woven on water jet and air jet looms in the later stage. After the later dyeing and finishing, the yarn core shrinks, and the full-dull POY wrapped on the outside protrudes on the surface, and the cloth surface presents a three-dimensional and thick feeling. The product has a strong tightening performance, so the cloth surface is thicker. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 is a process flow chart of the present invention;

[0029] In the figure: 1, FDY raw yarn rack; 2, POY raw yarn rack; 3, first roller; 4, anti-stiffness device; 5, first heat box; 6, cooling plate; 7, zero roller; 8, S twisting false twister; 9, yarn guide; 10, Z twisting false twister; 11, second roller; 12, auxiliary roller; 13, bypass wire tube; 14, second heat box; 15, network device; 16, third roller; 17, oiling oil tanker; 18, winding and forming device; 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.

[0033] Embodiment 1:

[0034] like Figure 1 As shown, a production equipment for double-twist high-shrinkage matte fiber includes a POY raw yarn rack 2, an FDY raw yarn rack 1, a double-wire texturing machine, a first heat box 5 arranged on the double-wire texturing machine, a cooling plate 6, a second heat box 14, a false twister, a network device 15, a plurality of rollers, an oiling tanker 17 and a winding and forming device 18, wherein the POY raw yarn rack 2 is provided with a high-F full-matte POY yarn cake, the FDY raw yarn rack 1 is provided with a high-shrinkage FDY yarn cake, and the FDY raw yarn rack 1 and the network device 15 are connected. A yarn guide 9 and a bypass wire tube 13 are provided in between. The high-shrinkage FDY yarn bundle on the FDY raw yarn rack 1 is suspended through the yarn guide 9 and enters the bypass wire tube 13 outside the second hot box 14. The high-shrinkage FDY yarn bundle is introduced into the network device 15 through the bypass wire tube 13 for winding and wrapping. The double-wire texturing machine can simultaneously perform false twisting on two of the full-dull POY yarn bundles. After false twisting, the two full-dull POY yarn bundles are wound and wrapped around the outside of the FDY yarn bundle through the network device 15.

[0035] On the basis of the original Hongyuan HY-7HLV texturing machine, an FDY raw yarn path is added through the yarn guide 9 and the bypass yarn tube 13, so that the high shrinkage FDY yarn bundle on the FDY raw yarn rack 1 is suspended through the yarn guide 9 and enters the bypass yarn tube 13 outside the second hot box 14, and the high shrinkage FDY yarn bundle is introduced into the network device 15 through the bypass yarn tube 13 to be wrapped with the two high F full-dull POY yarn bundles after false twisting, so as to realize the three-filament blending operation, and the high F full-dull POY yarn is used as the wrapping yarn, and the high shrinkage FDY yarn bundle is used as the core yarn, which can make the blended fiber not only have the high shrinkage performance of the FDY yarn, but also have a good full-dull effect on the outside. The double-twisted high-shrinkage dull fiber is mainly woven on water-jet and air-jet looms. After the dyeing and finishing, the yarn core shrinks, and the full-dull POY wrapped on the outside protrudes on the surface, and the cloth surface presents a three-dimensional and thick feeling. In addition, due to the physical properties of full matte POY, the fabric has a matte color, achieving a refreshing visual effect. The finished fabric is mainly used for curtain fabrics and other fabrics after post-dyeing and finishing. Because the product has strong tightening properties, the fabric surface is thicker. In addition, the full matte property makes the fabric have a matte color, a higher grade, and the shading effect better meets the needs of modern young people for curtain fabrics.

[0036] A further improvement is that the discharge end of the cooling plate 6 is provided with an S-twist false twister 8 and a Z-twist false twister 10, and the two fully matte POY tows are respectively false-twisted by the S-twist false twister 8 and the Z-twist false twister 10 to form a residual torque in a clockwise twist and a residual torque in a counterclockwise twist, and the two fully matte POY tows wound around the outside of the FDY tow are offset by the S-twist false twister 8 and the Z-twist false twister 10 during wrapping to achieve residual torque.

[0037] When two high F full-dull POY yarns come out of the first heat box 5 and enter the next roller for plying, the yarn bundle formed by the single-filament false twister is a single-way structure, and it is difficult to eliminate the torque. Therefore, an S-twist false twister 8 and a Z-twist false twister 10 are arranged at the discharge end of the cooling plate 6. The two high F full-dull POY yarn bundles are respectively false-twisted by the S-twist false twister 8 and the Z-twist false twister 10 to form a residual torque of clockwise twist and a residual torque of counterclockwise twist, so that the residual torques of the two high F full-dull POY yarn bundles offset each other after plying, achieving the effect of zero torque, so that the two high F full-dull POY yarn bundles wound around the outside of the high shrinkage FDY yarn bundle no longer have torque when wrapped, and have better firmness, higher fit and better uniformity when networked.

[0038] A further improvement is that the wire guide 9 is a rotary wire guide 9 .

[0039] When the high-shrinkage FDY tow is incorporated, the existing yarn guide 9 is prone to uneven tension. Therefore, it is replaced with a rotary yarn guide 9. The rotary yarn guide 9 can solve the problem of uneven tension when the high-shrinkage FDY tow is incorporated.

[0040] A further improvement is that an anti-stiffness device 4 is provided on the roller adjacent to the POY raw yarn rack 2.

[0041] Since two high-F fully matt POY tows need to pass through the roller adjacent to the POY raw yarn rack 2 at the same time, the full matt causes serious wear on the leather roller, resulting in some spindle positions being light-transmissive but not compacted, which easily leads to insufficient stretching and stiff yarn problems during the production process. In order to ensure the stability between the two high-F fully matt POY tows and the rollers, an anti-stiffness device 4 is installed on the wire moving device in front of a roller, which greatly improves the uniformity of the tow stretching, thereby effectively avoiding the occurrence of the above-mentioned problems.

[0042] A further improvement is that the hot rails in the first hot box 5 are cleaned with a hot box cleaning agent and then sprayed with a layer of alkaline talcum powder.

[0043] Since high F full-dull POY tow is prone to produce tar when heated in the hot box, resulting in a relatively short production cycle, the hot rail in the first hot box 5 needs to be cleaned with a hot box cleaner during each maintenance, and then a layer of alkaline talcum powder is sprayed to ensure production stability.

[0044] Embodiment 2:

[0045] like Figure 1 and Figure 2 As shown, a method for preparing a double-twisted high-shrinkage matte fiber, the method for preparing a double-twisted high-shrinkage matte fiber comprising:

[0046] S1, two high F full dull POY tows on the POY raw yarn rack 2 are simultaneously pulled by a roller 3 and then respectively enter the first heat box 5 for heating, and the two high F full dull POY tows heated by the first heat box 5 are cooled by a cooling plate 6 and then respectively passed through an S twisting false twister 8 and a Z twisting false twister 10 for false twisting;

[0047] S2, after false twisting, the two fully matte POY tows are drawn by the second roller 11 again, and then heated by the auxiliary roller 12 and the second heat box 14 in turn and then enter the network device 15;

[0048] S3, a high shrinkage FDY tow after passing through the zero roller 7 enters the network device 15 on the texturing machine through the external bypass yarn tube 13, and the high shrinkage FDY tow is used as the yarn core, and two high F full matte POY tows are wrapped around the outside of the high shrinkage FDY tow through the network nozzle in the network device 15 to form a double twist matte fiber;

[0049] S4, the double-twist matte fiber in step S3 is pulled by three rollers 16 and oiled by oiling tanker 17, and then enters winding device 18 for winding. After winding, the double-twist high-shrinkage matte fiber is packed and stored in warehouse after quality inspection.

[0050] Generally, during blending, the network device 15 is arranged between the second roller 11 and the auxiliary roller 12. The tow is first blended and then heated by the second heat box 14, which results in poor network of the blended fibers and poor firmness. Therefore, after the process is improved, the network device 15 is arranged behind the second heat box 14 to form a lower network. After the two high-F full-dull POY tows are combined, they are first heated by the second heat box 14, and then the heated full-dull tow and the unheated high-shrinkage FDY tow are entangled at the network device 15, which not only makes the network better, but also increases the air pressure of the network nozzle on the network device 15, so that the firmness of each network point on the fiber can be better. At the same time, during the production process, a high-shrinkage FDY tow after passing through the zero roller 7 enters the network device 15 on the texturing machine through the external bypass wire tube 13, and the high-shrinkage FDY tow is used as the yarn core. The network nozzle in the network device 15 wraps two high-F full-dull POY tows around the outside of the high-shrinkage FDY tow to form a double-twisted dull fiber; then it is successively pulled by the three rollers 16, and the oiling tanker 17 enters and exits the oiling, and then enters the winding and forming device 18 for winding and forming. The double-twisted high-shrinkage dull fiber after winding and forming is packed and stored in the warehouse after quality inspection. FDY yarn is used as the yarn core, and the full-dull POY is wrapped around its outside through the action of the network nozzle. Because the FDY yarn has a high shrinkage performance, the yarn core shrinks after dyeing and finishing, and the full-dull POY wrapped around the outside protrudes on the surface, and the cloth surface presents a three-dimensional and thick feeling. In addition, due to the physical properties of the full-dull POY, the fabric has a matte color, achieving a visual effect that makes people look brand new, and is deeply favored by consumers.

[0051] Further improvements are that the single-filament F number of the full-dull POY tow is not less than 144, the boiling water shrinkage of the FDY tow is greater than 30%; the boiling water shrinkage of the double-twist high-shrinkage matt fiber after post-treatment is greater than 6.5%; the curling shrinkage of the double-twist high-shrinkage matt fiber is greater than 11%.

[0052] The single-filament F number of the full-dull POY tow is not less than 144, the boiling water shrinkage of the FDY tow is greater than 30%, and the boiling water shrinkage of the double-twist high-shrinkage matting fiber after finishing is greater than 6.5%; the fabric prepared by the double-twist high-shrinkage matting fiber can have a better three-dimensional sense, especially when the curling shrinkage of the double-twist high-shrinkage matting fiber after finishing is greater than 11%, the full-dull POY tow can achieve the best three-dimensional effect without separation.

[0053] A further improvement is that the oiling rate of the oiling wheel 17 on the double-twisted high-shrinkage matte fiber is 3.50-4.00%.

[0054] When wrapping three tows, if the oil content is low, it is easy to have difficulty in unwinding, while if the oil content is too high, the tows are prone to oil contamination. Therefore, the oiling rate of the oiling wheel 17 pairs of double-twisted high-shrinkage matte fibers is controlled between 3.50 and 4.00%, which can avoid the problem of difficulty in unwinding and the occurrence of oily fibers.

[0055] As a further improvement, the aperture of the network chip in the network device 15 is 1.6, the network air compressor is controlled at 3.5 bar, and the network density generated by the network device 15 is ≥ 120 / m.

[0056] The network device 15 uses the Heberlin S13, a network chip with an aperture of 1.6, to make the network nodes smaller, the network degree higher and more solid. At the same time, through the action of the air pressure controller and the regulating valve, the network air compressor is controlled at a fixed value of 3.5 bar, which can avoid the terminal pressure fluctuation caused by the main pipe pressure fluctuation and ensure the uniformity of the network point. After the above adjustment, the network degree generated by the network device 15 can be ≥120 / m, so that it can be more solid and avoid the phenomenon of local separation of POY tows during later processing. The indicators of the double-twisted high-shrinkage matting fiber produced by the above preparation method are shown in Table 1:

[0057] Table 1

[0058] Project Name Standard requirements Measured value Linear density deviation rate / % ±2.5 -0.8 <![CDATA[Coefficient of variation of linear density (CV b ) / %]]> ≤1.20 0.47 Breaking strength / (cN / dtex) ≥2.70 3.35 <![CDATA[Coefficient of variation of breaking strength (CV b ) / %]]> ≤7.00 2.44 Elongation at break / % <![CDATA[M1±5.0]]> 22.8 <![CDATA[Coefficient of variation of elongation at break (CV b ) / %]]> ≤12.00 3.54 Curl shrinkage / % <![CDATA[M2(1±20%)]]> 11.9 Coefficient of variation of curl shrinkage (CVb) / % ≤10.0 2.2 Curl stability / % ≥65.0 70.7 Boiling water shrinkage <![CDATA[M3±0.6]]> 6.8 Oil content / % <![CDATA[M4±0.80]]> 3.80 Network degree / (unit / m) <![CDATA[M5(115%)]]> 122 Residual torque / none

[0059] The double-twist high-shrinkage matte fiber is mainly woven on water-jet and air-jet looms. The finished fabric is mainly used for curtain fabrics and other fabrics after dyeing and finishing. Because the product has strong shrinkage performance, the fabric surface is thicker. In addition, the full matte feature makes the fabric have a matte color, a higher grade, and the shading effect better meets the needs of modern young people for curtain fabrics.

[0060] 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 production equipment for double-twist high-shrinkage matte fiber, comprising a POY precursor rack (2), an FDY precursor rack (1), a double-wire texturing machine, a first heat box (5) arranged on the double-wire texturing machine, a cooling plate (6), a second heat box (14), a false twister, a network device (15), a plurality of rollers, an oiling tanker (17) and a winding and forming device (18), characterized in that: The POY raw yarn rack (2) is provided with a high F fully matte POY yarn cake, the FDY raw yarn rack (1) is provided with a high shrinkage FDY yarn cake, a yarn guide (9) and a bypass yarn tube (13) are provided between the FDY raw yarn rack (1) and the network device (15), the high shrinkage FDY yarn bundle on the FDY raw yarn rack (1) is suspended through the yarn guide (9) and enters the bypass yarn tube (13) outside the second hot box (14), and the high shrinkage FDY yarn bundle is introduced into the network device (15) through the bypass yarn tube (13) for winding and wrapping, and the double-wire texturing machine can simultaneously perform false twisting on two fully matte POY yarn bundles, and the two fully matte POY yarn bundles after false twisting are wound and wrapped around the outside of the FDY yarn bundle through the network device (15).

2. The production equipment of the double twist high shrinkage matte fiber according to claim 1, characterized in that: The discharge end of the second heat box (14) is provided with an S-twist false twister (8) and a Z-twist false twister (10); the two fully matte POY tows are respectively false-twisted by the S-twist false twister (8) and the Z-twist false twister (10) to form one with a residual torque in a clockwise twist direction and one with a residual torque in a counterclockwise twist direction; the two fully matte POY tows wound around the outside of the FDY tow are wrapped by the S-twist false twister (8) and the Z-twist false twister (10) to achieve the offset of residual torque.

3. The production equipment of the double twist high shrinkage matte fiber according to claim 1, characterized in that: The wire guide (9) is a rotary wire guide.

4. The production equipment of the double twist high shrinkage matte fiber according to claim 1, characterized in that: An anti-stiffness device (4) is provided on the roller adjacent to the POY raw yarn rack (2).

5. The production equipment of the double twist high shrinkage matte fiber according to claim 1, characterized in that: The hot rails in the first hot box (5) are cleaned with a hot box cleaning agent and then sprayed with a layer of alkaline talcum powder.

6. A method for preparing a double-twisted high-shrinkage matte fiber using the production equipment according to any one of claims 1 to 5, characterized in that: The preparation method of the double-twisted high-shrinkage matte fiber comprises: S1, two high F full-dull POY yarn bundles on a POY raw yarn rack (2) are simultaneously pulled by a roller (3) and then respectively enter a first heat box (5) for heating; the two high F full-dull POY yarn bundles heated by the first heat box (5) are cooled by a cooling plate (6) and then respectively pass through an S-twist false twister (8) and a Z-twist false twister (10) for false twisting; S2, after false twisting, the two fully matte POY tows enter the second roller (11) for traction again, and then pass through the auxiliary roller (12) and the second heat box (14) for heating in turn before entering the network device (15); S3, a high shrinkage FDY tow after passing through the zero roller (7) enters the network device (15) on the texturing machine through an external bypass yarn tube (13), and the high shrinkage FDY tow is used as the yarn core. Two high F full-dull POY tows are wrapped around the outside of the high shrinkage FDY tow through the network nozzle in the network device (15) to form a double-twisted dull fiber; S4, the double-twisted matte fiber in step S3 is pulled by three rollers (16), oiled by an oiling tanker (17), and then enters a winding and forming device (18) for winding and forming. After the winding and forming process, the double-twisted high-shrinkage matte fiber is quality inspected, packaged, and stored in a warehouse.

7. The method for preparing a double-twisted high-shrinkage matte fiber according to claim 6, characterized in that: The single-filament F number of the full-dull POY tow is not less than 144, the boiling water shrinkage of the FDY tow is greater than 30%, and the boiling water shrinkage of the double-twisted high-shrinkage dull fiber is greater than 6.5%.

8. The method for preparing a double-twisted high-shrinkage matte fiber according to claim 7, characterized in that: The curl shrinkage rate of the double-twisted high-shrinkage matte fiber is greater than 11%.

9. The method for preparing a double-twisted high-shrinkage matte fiber according to claim 6, characterized in that: The oiling rate of the oiling wheel (17) on the double-twisted high-shrinkage matte fiber is 3.50-4.00%.

10. The method for preparing a double-twisted high-shrinkage matte fiber according to claim 6, characterized in that: The aperture of the network chip in the network device (15) is 1.6, the network air compressor is controlled at 3.5 bar, and the network density generated by the network device (15) is ≥120 / m.

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