One-step mixed-fiber super-high shrinkage composite filament, its production method and spinning equipment

Abstract

The present application discloses a production method of a one-step mixed-fiber super-high shrinkage composite filament, comprising the following steps: spinning a first filament bundle and a second filament bundle at the same spinning position through a one-step spinning technique; spinning the first filament bundle into a first long filament and spinning the second filament bundle into a second long filament; the first long filament being a fully drawn yarn and the second long filament being a high-oriented yarn; the first long filament and the second long filament having different total fineness, different single-filament fineness, and different boiling water shrinkage rates; the boiling water shrinkage rate of the first long filament being greater than that of the second long filament and the difference being greater than 30%; subjecting the first long filament and the second long filament to online doubling and texturing and winding to obtain a mixed-fiber super-high shrinkage composite filament. The one-step mixed-fiber super-high shrinkage composite filament, its production method, and spinning equipment provided by this specification can endow the produced composite filament with excellent fluffiness, softness, velvetiness, drapability, and stiffness, with excellent performance, and at the same time can improve production efficiency and reduce production costs.

Description

Technical Field

[0001] This specification relates to the technical field of chemical fiber production, and particularly relates to a one-step mixed-fiber super-high shrinkage composite long filament, a production method thereof, and a spinning device. Background Art

[0002] The description in this part only provides background information related to the disclosure of this specification, and does not constitute prior art.

[0003] Mixed-fiber differential shrinkage long filaments refer to composite long filaments formed by mixing and networking two or more kinds of long filaments with different boiling water shrinkage rates, different finenesses, different single-filament finenesses, and even different fiber cross-sections. When the fabric woven from this kind of yarn is subjected to heat treatment such as dyeing and finishing, due to the difference between the high and low boiling water shrinkage rates, the fibers within the same yarn will exhibit different creeping and movement. The high boiling water shrinkage rate fibers with a larger single-filament fineness will retract into the middle of the yarn to form the skeleton of the yarn, while the low boiling water shrinkage rate fibers with a smaller single-filament fineness will be in a curly form and wrap around the high boiling water shrinkage fibers, giving the surface of the yarn rich and fine curved loops. When this kind of fiber is woven into cloth, it can endow the fabric with excellent fluffiness, softness, velvetiness, fineness, and a combination of bone feeling, becoming one of the representatives of high-sensory fibers.

[0004] Matsui Masao classified mixed-fiber differential shrinkage fibers in "Spinning of High-Sensory Fibers". Basically, the composite filaments with a difference in boiling water shrinkage rate of less than 7% between two kinds of long filaments are called traditional differential shrinkage mixed-fiber filaments, and the composite filaments with a difference in boiling water shrinkage rate of 20% - 40% between two kinds of long filaments are called new super-differential shrinkage mixed-fiber filaments. Further refined, the difference in boiling water shrinkage rate between two kinds of long filaments of 15% - 22% is called high shrinkage mixed-fiber filaments, and the composite filaments with a difference in boiling water shrinkage rate greater than 22% between two kinds of long filaments are called super-high shrinkage mixed-fiber filaments. The greater the difference in boiling water shrinkage rate, the more excellent the fabric style, hand feeling, and appearance. And the long filaments with a boiling water shrinkage rate greater than 30% are called super-high shrinkage filaments, and generally, it is necessary to modify polyester into a copolymer to prepare them. It is reported that conventional polyester FDY production can prepare fibers with a high boiling water shrinkage rate, but because it is prepared by the method of completely closing the second heating roll, the supramolecular structure of the fiber is incomplete, and it presents a hard and lumpy state after boiling water treatment, which is not suitable for weaving. The high boiling water shrinkage rate fibers with practical value should have mechanical properties and fiber structures that meet the weaving conditions, and the textiles woven should also have good shape retention and dimensional stability.

[0005] When the total fineness of the two kinds of long filaments is matched, the single-filament linear density is thick and thin, and the difference in boiling water shrinkage rate is large, the fibers of the fabric after dyeing and finishing will show the effects of thin outside and thick inside, soft outside and rigid inside, loose outside and tight inside, curved outside and straight inside. This will make the textile fabric have a skeleton that is not soft and rotten and has a body, and at the same time has the characteristics of being delicate, fluffy, and plump. This structure can endow the fabric with excellent fabric characteristics such as fluffy hand feeling, rich, soft, lively, elastic, and draping.

[0006] In known production methods, there are generally two one-step methods for producing mixed-fiber differential-shrinkage filaments. One method is to design micropores with different diameters and different shapes on the same spinneret plate, and then use, such as heat pipes and draw heat rollers for spinning and drawing, to obtain filaments with different fiber types and different shrinkages. For example, the method for manufacturing differential-fiber, differential-shape, and differential-shrinkage three-differential polyester composite filaments disclosed in Chinese Patent ZL01126745.3 introduces a method of setting different hole shapes and different hole cross-sections on the same spinneret plate at the same spinning position, and obtaining differential-fiber, differential-shape, and differential-shrinkage filaments through heat pipe drawing. However, it can be known from the theory of chemical fiber technology that although filaments can be produced with different cross-sections on the same plate, if the differences in plate hole parameters are large, the rheological parameters of various plate holes, such as shear rate and spinneret draw ratio, will vary greatly. And both the shear rate and the spinneret draw ratio have a production limit. If the limit is exceeded, continuous and stable production cannot be guaranteed; but if the differences in plate hole parameters are small, a large difference in boiling water shrinkage rate cannot be obtained. The aforementioned patent only hints at the possibility of differences in boiling water shrinkage rate of three-differential composite filaments, but does not mention the stability of continuous production. From the perspective of chemical fiber technology and common sense of chemical fiber production, generally, the difference in boiling water shrinkage rate of fibers prepared with different hole shapes and different cross-sections on the same plate is less than 15%, and it is difficult to produce composite filaments with a higher difference in boiling water shrinkage rate under continuous and stable conditions. Another method is, for example, the spinning and winding combined manufacturing process of one-step 24-end / position multi-differential mixed-fiber composite fibers disclosed in Chinese Patent ZL200910024905.1, which introduces a method of producing differential-fiber and differential-shrinkage composite filaments by one-step POY + FDY. However, POY is a pre-oriented yarn with a large elongation at break and a small breaking strength. Generally, due to poor mechanical properties, the dimensional stability of the fabric is poor and it cannot be directly used for weaving. Basically, it needs to be drawn or drawn and deformed to obtain good mechanical properties to meet textile processing requirements. Therefore, the mechanical properties of POY + FDY differential-fiber and differential-shrinkage composite filaments are poor, resulting in low strength and poor dimensional stability of the fabric, and it is easy to arch when worn. In addition, due to the large difference in molecular structure between POY and FDY, POY is basically an amorphous structure, and the dyeing rates of the two are quite different. The FDY component of the fabric appears white and hazy (also called showing white), so there are still certain limitations in textile product development.

[0007] Generally, filaments with excellent mechanical properties and a large difference in ultra-high boiling water shrinkage rate are all produced by a two-step method, that is, using a copolyester filament with a high boiling water shrinkage rate and another filament with a low boiling water shrinkage rate to be merged and combined on a merging and doubling machine. However, obtaining mixed-fiber ultra-high shrinkage composite filaments by the two-step method has a long production process and high production costs. Moreover, filaments with a boiling water shrinkage rate greater than 30% generally need to be spun from polyester modified into high-shrinkage polyester, which increases the difficulty of product development and production costs.

[0008] It should be noted that the above introduction of the technical background is only for the convenience of clearly and completely explaining the technical solutions in this specification and facilitating the understanding of those skilled in the art. It cannot be considered that the above technical solutions are well-known to those skilled in the art just because these solutions are described in the background art part of this specification. Summary of the Invention

[0009] In view of the deficiencies of the prior art, an object of this specification is to provide a one-step mixed-fiber super-high shrinkage composite filament and its production method and spinning equipment. Conventional polyester can be used, and the produced composite filament can endow the yarns in the fabric with the characteristics of "thin outside and thick inside, soft outside and rigid inside, curved outside and straight inside, loose outside and tight inside". Thereby, the textile fabric has excellent fluffiness, softness, velvetiness, drapability and stiffness, with excellent performance, and at the same time can improve production efficiency and reduce production costs.

[0010] To achieve the above object, an embodiment of this specification provides a production method of a one-step mixed-fiber super-high shrinkage composite filament, including the following steps:

[0011] Spinning a first filament bundle and a second filament bundle at the same spinning position through one-step spinning technology;

[0012] Spinning the first filament bundle into a first filament and the second filament bundle into a second filament; the first filament is a fully drawn filament, and the second filament is a high-oriented filament; the first filament and the second filament have different total finenesses, different single-filament finenesses and different boiling water shrinkage rates, and the boiling water shrinkage rate of the first filament is greater than that of the second filament and the difference is greater than 30%;

[0013] Subjecting the first filament and the second filament to online doubling and texturing and winding to obtain a mixed-fiber super-high shrinkage composite filament.

[0014] As a preferred embodiment, the spinning position includes a first spinning part for spinning the first filament bundle and a second spinning part for spinning the second filament bundle; the first spinning part and the second spinning part respectively adopt metering pumps and melt distribution pipelines of different specifications and are arranged side by side in the same spinning box; the first spinning part successively includes a spinning box, a first metering pump, a first melt distribution pipeline, a first spinning component provided with a first spinneret plate, a side air-blowing device, and a first nozzle oiling device from front to back, and the second spinning part successively includes a spinning box, a second metering pump, a second melt distribution pipeline, a second spinning component provided with a second spinneret plate, a slow cooling heater, an annular air-blowing device, and a second nozzle oiling device from front to back; the steps of spinning the first filament bundle and the second filament bundle include:

[0015] The polyester melt for direct melt spinning or chip spinning enters the first spinning unit and the second spinning unit with different metering pumps and melt pipe inner diameters in the same spinning position through an external melt distribution pipeline. The flow rate of the polyester melt in the first spinning unit is less than that in the second spinning unit, and the inner diameter of the melt pipe in the first spinning unit is less than that in the second spinning unit; the polyester melt in the first spinning unit is cooled and solidified into the first tow through the first spinning part; the polyester melt in the second spinning unit is cooled and solidified into the second tow through the second spinning part.

[0016] As a preferred embodiment, the step of spinning the first tow into the first filament includes: passing the first tow through a first pre-network device, a first godet roller group, and a second godet roller group, and performing hot drawing and setting on the first tow to obtain the first filament; wherein, the orifice of the first spinneret plate is an asymmetric flow channel; the spinning speed of the first godet roller group is 2500 - 3000 m / min, the temperature is 70 - 90 °C, the spinning speed of the second godet roller group is 4700 - 5000 m / min, and the temperature is 80 - 115 °C.

[0017] As a preferred embodiment, the first godet roller group and the second godet roller group are respectively arranged in a first godet group heat preservation cover and a second godet group heat preservation cover, and the first tow takes a single winding form with a wrap angle less than 360 degrees on the godet rollers of the first godet roller group and the second godet roller group; the surface of the first godet roller group is plated with hard chromium, and the surface roughness is 0.15 - 0.3 microns; the surface of the second godet roller group is sprayed with ceramics, and the surface roughness is 0.3 - 0.7 microns; the godet rollers of the first godet roller group and the second godet roller group are both heated by multi-stage electromagnetic induction.

[0018] The second tow takes a single winding form with a wrap angle less than 360 degrees on the godet rollers of the first godet pair plate and the second godet pair plate; the surfaces of the godet rollers of the first godet pair plate and the second godet pair plate are both sprayed with ceramics, and the surface roughness is 0.3 - 0.7 microns; the godet rollers of the first godet pair plate and the second godet pair plate are not heated.

[0019] As a preferred embodiment, the step of spinning the second tow into the second filament includes: passing the second tow through a second pre-network device and a first godet pair plate to obtain the second filament; wherein, the height of the slow cooling heater is 30 - 80 mm; the spinning speeds of the first godet pair plate and the second godet pair plate are 4700 - 5000 m / min.

[0020] As a preferred embodiment, the step of passing the first filament and the second filament through an online ply network and winding to obtain a mixed fiber super high shrinkage ply filament includes:

[0021] A doubling network device is arranged between the first filament pair disk and the second filament pair disk. The first filament and the second filament are combined by a comb-type filament guide device after the first filament pair disk and then enter the doubling network device, and then bypass the second filament pair disk. The mixed fiber super high shrinkage composite filament passing through the second filament pair disk is connected to a winding machine, and the spinning speeds of the second filament pair disk and the high-speed winding head of the winding machine are 4700 - 5000 m / min.

[0022] As a preferred embodiment, the total fineness of the first filament is 33 - 83 dtex, the single filament fineness is 2.0 - 4.0 dtex, and the boiling water shrinkage rate is greater than 35%; the total fineness of the second filament is 55 - 167 dtex, the single filament fineness is 0.5 - 1.5 dtex, and the boiling water shrinkage rate is less than 5%.

[0023] As a preferred embodiment, the difference in the boiling water shrinkage rate between the first filament and the second filament is 30% - 40%.

[0024] The embodiment of the present specification provides a one-step mixed fiber super high shrinkage composite filament, which is made by the production method of the one-step mixed fiber super high shrinkage composite filament described in any one of the above embodiments.

[0025] The embodiment of the present specification provides a spinning device for a one-step mixed fiber super high shrinkage composite filament, and the spinning device is used to implement the production method of the one-step mixed fiber super high shrinkage composite filament described in any one of the above embodiments.

[0026] Beneficial effects:

[0027] The production method of the one-step mixed fiber super high shrinkage composite filament provided by this embodiment spins the first filament bundle and the second filament bundle at the same spinning position through the one-step spinning technology. The first filament bundle and the second filament bundle are respectively made into the first filament and the second filament with different total fineness, different single filament fineness and different boiling water shrinkage rates. The first filament is a fully drawn yarn (FDY), and the second filament is a highly oriented yarn (HOY). The boiling water shrinkage rate of the first filament is greater than that of the second filament and the difference is greater than 30%. Finally, the first filament and the second filament are subjected to online doubling network and winding to obtain a mixed fiber super high shrinkage composite filament. Therefore, the mechanical properties of the mixed fiber super high shrinkage composite filament are excellent and the difference in single filament fineness is large, which can make the fabric have excellent fluffiness, softness, velvetiness, drapability and bone feeling, with excellent performance. At the same time, it is produced by the conventional polyester one-step method, which improves the production efficiency of the mixed fiber super high shrinkage composite filament and reduces the production cost.

[0028] After the mixed super-high shrinkage composite filament produced by this production method is woven and dyed and finished, the fiber presents a core-sheath structure. The core filament is a filament with a relatively large single-filament fineness and a high boiling water shrinkage rate, which gives the fabric a sense of bone. The sheath filament is an ultra-fine denier filament with a relatively small boiling water shrinkage rate, which gives the fiber curling and fluffing properties. The textile woven from this fiber has excellent thin raising and thin flocking effects and is an excellent differential fiber.

[0029] Specific embodiments of the present invention are disclosed in detail with reference to the following description and the accompanying drawings, indicating the ways in which the principles of the present invention can be employed. It should be understood that the embodiments of the present invention are not limited thereby in scope.

[0030] Features described and / or illustrated for one embodiment can be used in the same or similar way in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0031] It should be emphasized that the term "comprising / including" as used herein refers to the presence of features, integers, steps or components, but does not preclude the presence or addition of one or more other features, integers, steps or components. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 It is a process flow chart of a production method of a one-step mixed super-high shrinkage composite filament provided in this embodiment;

[0034] Figure 2 It is a structural schematic diagram of a spinning device of a one-step mixed super-high shrinkage composite filament provided in this embodiment.

[0035] Description of the Reference Numerals in the Drawings:

[0036] 1. First spinning part; 10. Spinning box; 12. First spinneret plate; 13. Side blowing device; 14. First nozzle oiling device; 15. First pre-network device; 16. First guide wire group heat preservation cover; 17. First guide roller group; 18. Second guide wire group heat preservation cover; 19. Second guide roller group;

[0037] 2. Second spinning section; 22. Second spinneret; 23. Slow cooling heater; 24. Ring blowing device; 25. Second nozzle oiling device; 26. Second pre-network device; 27. First wire guiding disc;

[0038] 3. Ply networker; 4. Second wire guiding disc; 5. Winder; dy. Mixed fiber super high shrinkage ply filament. Detailed implementation mode

[0039] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there can also be another intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be another intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs. The terms used in the description of the present invention herein are only for the purpose of describing specific implementation manners and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0042] Please refer to Figure 1 This application implementation mode provides a production method for one-step mixed fiber super high shrinkage ply filament, including the following steps:

[0043] Step S10: Spinning a first filament bundle and a second filament bundle at the same spinning position by one-step spinning technology;

[0044] Step S20: Spinning the first filament bundle into a first long filament and the second filament bundle into a second long filament; the first long filament is a fully drawn yarn, and the second long filament is a high orientation yarn; the first long filament and the second long filament have different total fineness, different single filament fineness and different boiling water shrinkage rates, and the boiling water shrinkage rate of the first long filament is greater than that of the second long filament and the difference is greater than 30%;

[0045] Step S30: Pass the first filament and the second filament through an on-line doubling network and wind them to obtain a mixed-fiber super-high shrinkage composite filament.

[0046] The production method of the one-step mixed-fiber super-high shrinkage composite filament provided in this embodiment spins the first filament bundle and the second filament bundle at the same spinning position through the one-step spinning technology. The first filament bundle and the second filament bundle are respectively made into the first filament and the second filament with different total fineness, different single-filament fineness and different boiling water shrinkage rates. The first filament is a fully drawn yarn (FDY), and the second filament is a highly oriented yarn (HOY). The boiling water shrinkage rate of the first filament is greater than that of the second filament, and the difference is greater than 30%. Finally, the first filament and the second filament pass through an on-line doubling network and are wound to obtain a mixed-fiber super-high shrinkage composite filament. Therefore, the mechanical properties of the mixed-fiber super-high shrinkage composite filament are excellent, and the difference in single-filament fineness is large, which can make the fabric have excellent fluffiness, softness, velvetiness, drapability and stiffness, with excellent performance. At the same time, it is produced by the conventional polyester one-step method, which improves the production efficiency of the mixed-fiber super-high shrinkage composite filament and reduces the production cost.

[0047] After the mixed-fiber super-high shrinkage composite filament produced by this production method is woven and dyed and finished, the fiber presents a core-sheath structure. The core filament is a filament with a large single-filament fineness and a high boiling water shrinkage rate, giving the fabric stiffness. The sheath filament is an ultra-fine denier filament with a small boiling water shrinkage rate, giving the fiber delicate, curly and fluffy properties. The textile woven from this fiber has excellent thin flocking and thin raising effects and is an excellent differential fiber.

[0048] In step S10, the spinning position includes a first spinning part 1 for spinning the first filament bundle and a second spinning part 2 for spinning the second filament bundle. The first spinning part 1 and the second spinning part 2 respectively adopt metering pumps and melt distribution pipes of different specifications and are arranged side by side in the same spinning box 10. The first spinning part 1 successively includes a spinning box 10, a first metering pump, a first melt distribution pipe, a first spinning assembly provided with a first spinneret plate 12, a side blowing device 13, and a first nozzle oiling device 14 from front to back. The second spinning part 2 successively includes a spinning box 10, a second metering pump, a second melt distribution pipe, a second spinning assembly provided with a second spinneret plate 22, a slow cooling heater 23, an annular blowing device 24, and a second nozzle oiling device 25 from front to back.

[0049] Specifically, the steps of spinning the first tow and the second tow in step S10 include: the polyester melt for direct melt spinning or chip spinning passes through an external melt distribution pipeline and enters a first spinning unit and a second spinning unit with different metering pumps and melt pipe inner diameters in the same spinning position. The flow rate of the polyester melt in the first spinning unit is less than that in the second spinning unit, and the inner diameter of the melt pipe in the first spinning unit is less than that in the second spinning unit; the polyester melt in the first spinning unit is cooled and solidified into the first tow through the first spinning part; the polyester melt in the second spinning unit is cooled and solidified into the second tow through the second spinning part.

[0050] In step S20, the steps of spinning the first tow into the first filament include: passing the first tow through a first pre-network device 15, a first godet roller group 17, and a second godet roller group 19 to perform hot drawing and setting on the first tow, and obtaining the first filament with an ultra-high boiling water shrinkage rate.

[0051] Specifically, the first spinning part can be a spinning-drawing combined FDY device with an independent melt distribution pipeline and a spinning metering pump. The first godet roller group 17 and the second godet roller group 19 are respectively arranged in a first godet group heat preservation cover 16 and a second godet group heat preservation cover 18. In particular, the plate holes of the first spinneret plate 12 are designed into a specific asymmetric flow channel (that is, a cross-section includes two flow channels and the two flow channels are asymmetric). This structure enables the fibers to be rapidly cooled by a side air blowing device and then pass through the first godet roller group 17 at a relatively high speed in the FDY spinning-drawing process (the speed of the first godet roller group in the conventional FDY process is 1500 - 2500 m / min, while the spinning speed of the first godet roller group 17 in this application is 2500 - 3000 m / min). The first filament produced has an ultra-high boiling water shrinkage rate of more than 35%.

[0052] Specifically, the spinning speed of the first godet roller group 17 is 2500 - 3000 m / min, and the temperature is 70 - 90 °C. The spinning speed of the second godet roller group 19 is 4700 - 5000 m / min, and the temperature is 80 - 115 °C.

[0053] The first godet roller group 17 and the second godet roller group 19 constitute a drawing device. The first tow takes a single-wrap form with a wrap angle less than 360 degrees on the godet rollers of the first godet roller group and the second godet roller group. The surface of the first godet roller group 17 is plated with hard chromium, and the surface roughness is 0.15 - 0.3 microns; the surface of the second godet roller group 19 is sprayed with ceramics, and the surface roughness is 0.3 - 0.7 microns. The single-wrap method is beneficial to the ply and parallel operation of the first filament and the second filament and the equipment configuration. The godet rollers of the first godet roller group 17 and the second godet roller group 19 are both heated by multi-stage electromagnetic induction.

[0054] Although the conventional polyester FDY technology can also obtain filaments with a high boiling water shrinkage rate by turning off the temperature of the second draw roll, the filaments are fiber-locked and have an unstable structure after boiling water, so they are not suitable for manufacturing and processing, and high-shrinkage copolyester spinning production is still required. The high boiling water shrinkage rate filaments suitable for textile processing produced by this production method do not need to select high-shrinkage copolyester, and conventional polyester can obtain FDY filaments with a boiling water shrinkage rate greater than 35% that do not fiber-lock and have a stable structure.

[0055] In step S20, the step of spinning the second tow into the second filament includes: passing the second tow through the second pre-network device 26 and the first guide wire pair disk 27 to obtain the second filament with a lower boiling water shrinkage rate.

[0056] Specifically, the second spinning section 2 can be a high-speed HOY device with two sets of guide wire pairs of rollers, having a separate melt distribution pipe and a spinning metering pump. The height of the slow cooling heater is 30 - 80 mm. The spinning speed of the first guide wire pair disk is 4700 - 5000 m / min, that is, using the HOY high-speed spinning process, the obtained second filament has a lower boiling water shrinkage rate of less than 5%.

[0057] The second tow takes a single winding form with a wrap angle of less than 360 degrees on the guide wire rollers of the first guide wire pair disk 27 and the second guide wire pair disk 4. The surfaces of the guide wire rollers of the first guide wire pair disk 27 and the second guide wire pair disk 4 are sprayed with ceramics, and the surface roughness is 0.3 - 0.7 microns; the guide wire rollers of the first guide wire pair disk and the second guide wire pair disk are not heated.

[0058] In this embodiment, step S30 includes: arranging a ply networker 3 between the first guide wire pair disk 27 and the second guide wire pair disk 4. The first filament and the second filament are merged by the comb-shaped guide wire device after the first guide wire pair disk 27 and then enter the ply networker 3, and then bypass the second guide wire pair disk 4. The mixed fiber ultra-high shrinkage ply filament dy passing through the second guide wire pair disk 4 is connected to the winding machine 5. The spinning speeds of the second guide wire pair disk 4 and the high-speed winding head of the winding machine 5 are 4700 - 5000 m / min. Comb-shaped guide wire devices can be respectively arranged in front of the first guide wire pair disk 4 to position the first filament and the second filament.

[0059] Through the speed matching of the second guide wire roller group 19 and the second guide wire pair disk 4, the first filament and the second filament are ply-networked with a suitable tension to obtain a mixed fiber ultra-high shrinkage polyester filament, and the polyester filament is wound into a finished product at high speed by the winding machine 5.

[0060] In this embodiment, the total fineness of the first filament is 33 - 83 dtex, the single-filament fineness is 2.0 - 4.0 dtex, and the boiling water shrinkage rate is greater than 35%. The total fineness of the second filament is 55 - 167 dtex, the single-filament fineness is 0.5 - 1.5 dtex, and the boiling water shrinkage rate is less than 5%. The mixed super-high shrinkage composite long filament with such a specification composition will make the textile fabric have a non-soft and mushy skeleton and can also present an excellent textile style of being fluffy and delicate.

[0061] Further preferably, the difference in the boiling water shrinkage rate between the first filament and the second filament is 30% - 40%.

[0062] Example 1

[0063] The first filament bundle spun from the first spinning section 1 has a product specification of 33 dtex / 10f. The orifices of the first spinneret plate 12 are of a 9-character hollow asymmetric cross-section. After side blow cooling, oiling and bundling, and pre-networking, it passes through a relatively high-speed FDY spinning-drawing process with a spinning speed of 2950 m / min for the first godet roller group 17 and a spinning speed of 4820 m / min for the second godet roller group 19. The boiling water shrinkage rate of the first filament produced is 37%. The second filament bundle spun from the second spinning section 2 has a product specification of 56 dtex / 72f. The orifices of the second spinneret plate 22 are of a circular cross-section. After slow cooling by the heater 23, ring blow cooling, oiling and bundling, and pre-networking, it passes through the first godet pair 27 at a speed of 4800 m / min. The boiling water shrinkage rate of the second filament prepared is 4.2%. The first filament and the second filament are combined and networked before the second godet pair 4. The HOY high-speed spinning process with a speed of 4820 m / min for the second godet pair 4 is used to prepare a composite long filament product with a specification of 89 dtex / 82f, and the difference in the boiling water shrinkage rate is 32.8%.

[0064] Example 2

[0065] The first tow spun from the first spinning section has a product specification of 56 dtex / 24 f. The orifices of the first spinneret 12 have a double semi - moon asymmetric cross - section. After side - blowing cooling, oiling and bundling, and pre - texturing, it passes through the first godet roller group 17 with a spinning speed of 3000 m / min and the second godet roller group 19 with a spinning speed of 4920 m / min in a relatively high - speed FDY spin - draw process. The first filament produced has a boiling water shrinkage rate of 35%. The second tow spun from the second spinning section has a product specification of 83 dtex / 96 f. The orifices of the second spinneret 22 have a circular cross - section. After slow - cooling heater 23, ring - blowing cooling, oiling and bundling, and pre - texturing, it passes through the first godet pair 27 with a speed of 4900 m / min. The second filament prepared has a boiling water shrinkage rate of 3.6%. The first filament and the second filament are plied and networked before the second godet pair 4. The second godet pair 4 has a speed of 4920 m / min in a HOY high - speed spinning process. The product specification of the plied filament prepared is 139 dtex / 120 f, and the difference in boiling water shrinkage rate is 31.4%.

[0066] Based on the same concept, in the embodiments of the present invention, there is also provided a one - step mixed - fiber super - high - shrinkage plied filament. It should be noted that this one - step mixed - fiber super - high - shrinkage plied filament is made by the production method of the one - step mixed - fiber super - high - shrinkage plied filament described in any of the above - mentioned embodiments. For the detailed description of the relevant content, please refer to the above - mentioned production method section and will not be repeated here.

[0067] In this embodiment, the embodiment of this one - step mixed - fiber super - high - shrinkage plied filament corresponds to the embodiment of the production method. It can solve the technical problems solved by the embodiment of the production method and correspondingly achieve the technical effects of the embodiment of the production method. Specifically, this application will not elaborate here. The one - step mixed - fiber super - high - shrinkage plied filament provided by the present invention has a reasonable and adjustable combination of single - fiber fineness, and the product specifications can be serialized.

[0068] Based on the same concept, as Figure 2 shown, in the embodiments of the present invention, there is also provided a spinning device for the one - step mixed - fiber super - high - shrinkage plied filament. It should be noted that this spinning device is used to implement the production method of the one - step mixed - fiber super - high - shrinkage plied filament described in any of the above - mentioned embodiments and produce the one - step mixed - fiber super - high - shrinkage plied filament described in any of the above - mentioned embodiments. For the detailed description of the relevant content, please refer to the above - mentioned production method section and will not be repeated here.

[0069] In this embodiment, the embodiment of the spinning device of this one - step mixed - fiber super - high - shrinkage plied filament corresponds to the embodiment of the production method. It can solve the technical problems solved by the embodiment of the production method and correspondingly achieve the technical effects of the embodiment of the production method. Specifically, this application will not elaborate here.

[0070] Specifically, the spinning equipment for the one-step mixed-fiber super-high shrinkage composite filament can include a spinning position with a first spinning part 1 and a second spinning part 2. Different specifications of metering pumps and melt distribution pipelines are respectively adopted for the first spinning part 1 and the second spinning part 2, and they are arranged side by side in the same spinning box 10. The first spinning part 1 sequentially includes a spinning box 10, a first metering pump, a first melt distribution pipeline, a first spinning assembly provided with a first spinneret plate 12, a side blowing device 13, and a first nozzle oiling device 14 from front to back. The second spinning part 2 sequentially includes a spinning box 10, a second metering pump, a second melt distribution pipeline, a second spinning assembly provided with a second spinneret plate 22, a slow cooling heater 23, an annular blowing device 24, and a second nozzle oiling device 25 from front to back. The spinning equipment can also include a first pre-network device 15, a first godet roller group 17, a first godet group heat preservation cover 16, a second godet roller group 19, a second godet group heat preservation cover 18, a second pre-network device 26, a first godet pair plate 27, a ply networker 3, a second godet pair plate 4, a winding machine 5, etc.

[0071] It should be noted that in the description of this specification, the terms "first", "second", etc. are only used for descriptive purposes and to distinguish similar objects. There is no sequence between them, nor can they be understood as indicating or implying relative importance. In addition, in the description of this specification, unless otherwise stated, the meaning of "a plurality" is two or more.

[0072] Any numerical value cited herein includes all values from the lower limit value to the upper limit value increasing in increments of one unit, provided that there is an interval of at least two units between any lower value and any higher value. For example, if the value of the number of components or process variables (such as temperature, pressure, time, etc.) is stated as ranging from 1 to 90, preferably from 20 to 80, and more preferably from 30 to 70, it is intended to illustrate that values such as 15 to 85, 22 to 68, 43 to 51, 30 to 32, etc. are also explicitly listed in this specification. For values less than 1, a unit is appropriately considered to be 0.0001, 0.001, 0.01, or 0.1. These are merely examples of what is intended to be clearly expressed, and it can be considered that all possible combinations of the numerical values listed between the lowest value and the highest value are explicitly stated in this specification in a similar manner.

[0073] Unless otherwise stated, all ranges include the endpoints and all numbers between the endpoints. "About" or "approximate" used in conjunction with a range applies to both endpoints of the range. Thus, "about 20 to 30" is intended to cover "about 20 to about 30", including at least the specified endpoints.

[0074] All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of" in describing a combination shall include the recited elements, ingredients, components, or steps as well as other elements, ingredients, components, or steps that do not materially affect the basic novel characteristics of the combination. The use of the terms "comprising" or "including" to describe the combinations of elements, ingredients, components, or steps herein also contemplates embodiments consisting essentially of these elements, ingredients, components, or steps. By using the term "may" herein, it is intended that any of the attributes described as "may" include be optional.

[0075] A plurality of elements, ingredients, components, or steps can be provided by a single integrated element, ingredient, component, or step. Alternatively, a single integrated element, ingredient, component, or step can be separated into discrete plural elements, ingredients, components, or steps. The disclosure of the articles "a" or "an" used to describe an element, ingredient, component, or step is not intended to exclude other elements, ingredients, components, or steps.

[0076] It should be understood that the above description is for purposes of illustration and not limitation. Many embodiments and many applications other than the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but should be determined with reference to the appended claims and the full scope of equivalents to which those claims are entitled. For completeness, all articles and references, including patent applications and published disclosures, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to forego that subject matter nor should it be considered that the inventors did not consider that subject matter to be part of the disclosed inventive subject matter.

Claims

1. A production method of one-step mixed-fiber super-high shrinkage composite filament, characterized in that, it includes the following steps: Spinning a first filament bundle and a second filament bundle at the same spinning position by one-step spinning technology; Spinning the first filament bundle into a first long filament, and spinning the second filament bundle into a second long filament; the first long filament is a fully drawn yarn, and the second long filament is a high-oriented yarn; the first long filament and the second long filament have different total fineness, different single-filament fineness and different boiling water shrinkage rates, and the boiling water shrinkage rate of the first long filament is greater than that of the second long filament and the difference is greater than 30%; the boiling water shrinkage rate of the first long filament is greater than 35%, and the boiling water shrinkage rate of the second long filament is less than 5%; Let the first long filament and the second long filament pass through an on-line composite network and winding to obtain a mixed-fiber super-high shrinkage composite long filament; The step of spinning the first filament bundle into a first long filament includes: making the first filament bundle pass through a first pre-network device, a first godet roller group, and a second godet roller group, and performing hot drawing and setting on the first filament bundle to obtain the first long filament; the spinning speed of the first godet roller group is 2500-3000 m / min, the temperature is 70-90 °C, and the spinning speed of the second godet roller group is 4700-5000 m / min, and the temperature is 80-115 °C; The step of spinning the second filament bundle into a second long filament includes: making the second filament bundle pass through a second pre-network device and a first guide pair disk to obtain the second long filament; wherein, the spinning speed of the first guide pair disk and the second guide pair disk is 4700-5000 m / min; The first filament bundle adopts a single-winding form with a wrap angle less than 360 degrees on the godet rollers of the first godet roller group and the second godet roller group; the second filament bundle adopts a single-winding form with a wrap angle less than 360 degrees on the godet rollers of the first guide pair disk and the second guide pair disk; the surfaces of the godet rollers of the first guide pair disk and the second guide pair disk are sprayed with ceramics, and the surface roughness is 0.3-0.7 microns; the godet rollers of the first guide pair disk and the second guide pair disk are not heated; The step of making the first long filament and the second long filament pass through an on-line composite network and winding to obtain a mixed-fiber super-high shrinkage composite long filament includes: A composite network device is arranged between the first guide pair disk and the second guide pair disk. The first long filament and the second long filament are combined by a comb-type godet after the first guide pair disk and then enter the composite network device, and then bypass the second guide pair disk. The mixed-fiber super-high shrinkage composite long filament passing through the second guide pair disk is connected to a winding machine, and the spinning speeds of the second guide pair disk and the high-speed winding head of the winding machine are 4700-5000 m / min; The spinning position includes a first spinning part for spinning the first filament bundle and a second spinning part for spinning the second filament bundle; the first spinning part and the second spinning part respectively adopt metering pumps and melt distribution pipelines of different specifications, and are arranged side by side in the same spinning box; the first spinning part successively includes a spinning box, a first metering pump, a first melt distribution pipeline, a first spinning assembly provided with a first spinneret plate, a side air-blowing device, and a first nozzle oiling device from front to back, and the second spinning part successively includes a spinning box, a second metering pump, a second melt distribution pipeline, a second spinning assembly provided with a second spinneret plate, a slow cooling heater, an annular air-blowing device, and a second nozzle oiling device from front to back; the steps of spinning the first filament bundle and the second filament bundle include: The polyester melt of direct melt spinning or chip spinning passes through an external melt distribution pipeline and enters a first spinning unit and a second spinning unit in the same spinning position, where both the metering pump and the inner diameter of the melt pipe are different. The flow rate of the polyester melt in the first spinning unit is less than that in the second spinning unit, and the inner diameter of the melt pipe in the first spinning unit is less than that in the second spinning unit; the polyester melt in the first spinning unit is cooled and solidified into the first filament bundle through the first spinning part; the polyester melt in the second spinning unit is cooled and solidified into the second filament bundle through the second spinning part; The first godet roller group and the second godet roller group are respectively arranged in a first godet group heat preservation cover and a second godet group heat preservation cover; the orifice of the first spinneret plate is an asymmetric flow channel; the cross-section of the orifice of the first spinneret plate is a hollow Arabic numeral "9" or a double half-moon asymmetric shape; the cross-section of the orifice of the second spinneret plate is circular; The surface of the first godet roller group is plated with hard chromium, and the surface roughness is 0.15 - 0.3 microns; the surface of the second godet roller group is sprayed with ceramics, and the surface roughness is 0.3 - 0.7 microns; the godet rollers of the first godet roller group and the second godet roller group are all heated by multi-stage electromagnetic induction.

2. The production method of one-step mixed-filament super-high shrinkage composite long filaments according to claim 1, characterized in that, the height of the slow cooling heater is 30 - 80 mm.

3. The production method of one-step mixed-filament super-high shrinkage composite long filaments according to claim 1, characterized in that, the total fineness of the first long filament is 33 - 83 dtex, and the single filament fineness is 2.0 - 4.0 dtex; the total fineness of the second long filament is 55 - 167 dtex, and the single filament fineness is 0.5 - 1.5 dtex.

4. The production method of one-step mixed-filament super-high shrinkage composite long filaments according to claim 1, characterized in that, the difference in the boiling water shrinkage rate between the first long filament and the second long filament is 30% - 40%.

5. A one-step mixed-filament super-high shrinkage composite long filament, characterized in that, it is made by the production method of one-step mixed-filament super-high shrinkage composite long filaments as described in any one of claims 1 - 4.

6. A spinning device for one-step mixed-filament super-high shrinkage composite long filaments, characterized in that, The spinning equipment is used to implement the production method of the one-step mixed fiber super high shrinkage composite filament as described in any one of claims 1-4.

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