Regenerated wool, acrylic fiber and polyester blended multi-flower velvet differential fiber and preparation method thereof

Abstract

The invention belongs to the technical field of fiber materials, and particularly relates to regenerated wool acrylic fiber polyester blended multi-flower velvet differential fiber and a preparation method thereof, and the preparation method comprises the following steps: (1) colored polyester POY spinning; (2) spinning colored polyester FDY; (3) texturing the core yarn DTY; (4) ATY space variant; according to the regenerated wool, acrylic fiber and polyester blended multi-flower velvet differential fiber and the preparation method thereof, colored polyester FDY strong fiber is obtained through the FDY process, and the problem that polyester long fiber cannot be combined with wool fiber is solved; meanwhile, the DTY elastic fibers and the wool acrylic fibers A50 / W50 can stretch out of the skin layer and are twisted with the colored polyester FDY strong fibers to form large looped piles after the skin-core yarn hanging ATY is subjected to air texturing, the soft and fine hand feeling of the wool fibers is achieved, meanwhile, the elasticity and wear resistance of the polyester fibers are considered, hole breaking and pilling are not likely to happen, and the breathability is also considered while warm keeping is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of fiber materials, and in particular relates to a regenerated wool-acrylic-polyester blended velvet differentiated fiber and a preparation method thereof. Background Art

[0002] Although fabrics woven from ordinary polyester (polyethylene terephthalate) filaments have the advantages of good strength, smoothness, crispness, easy washing and quick drying, they still have the disadvantages of hard hand feel, poor touch, poor air permeability and poor moisture absorption.

[0003] Currently, the wool production capacity on the market is low, the quantity is scarce and the price is expensive. The fibers of pure wool are relatively thin and short, and the strength is relatively low. The fabrics made from it are prone to yellowing, holes and pilling.

[0004] Existing textile technology uses polyester dyeing to achieve an imitation wool effect, but the imitation polyester wool cannot completely achieve the real wool effect in terms of dyeing effect or actual touch. Polyester is a long fiber and wool is a short fiber, and the two cannot be directly combined to obtain fibers.

[0005] Therefore, how to overcome the problem that polyester and wool cannot be blended due to inconsistent fiber lengths is a technical problem that urgently needs to be solved in this field.

[0006] It should be noted that the above information disclosed in this background technology section is only used to understand the background technology of the present application concept, and therefore, the above description is not considered to constitute information of the prior art. Summary of the invention

[0007] The disclosed embodiments at least provide a regenerated wool acrylic polyester blended velvet differentiated fiber and a preparation method thereof.

[0008] In a first aspect, the disclosed embodiment provides a method for preparing a differentiated fiber of a regenerated wool-acrylic-polyester blended velvet, comprising the following steps: (1) spinning colored polyester POY, namely, recyclable regenerated chips and masterbatches are placed in a silo for drying, then melted in a screw extruder, mixed in a mixer, and then fed into a first spinning box, ejected from a spinneret hole on a spinneret, solidified into filaments by a first cooling side-blowing system, oiled and bundled, and then wound to obtain colored polyester POY filaments; (2) spinning colored polyester FDY, namely, recyclable regenerated chips and masterbatches are mixed into a filamentary material, and then the filaments are wound ... The pellets are placed in a silo for drying, then melted in a screw extruder, mixed in a mixer, and then sent to a second spinning box, ejected from the spinneret holes on the spinneret, solidified by a second cooling side blowing system, and then stretched and shaped by the first and second stretching hot rollers, oiled and bundled, and then wound to obtain colored polyester FDY strong fiber; (3) core yarn DTY stretching, that is, the colored polyester POY filaments are stretched and false-twisted, heated in a first hot box, cooled, false-twisted and untwisted, heated in a second hot box, shaped, lubricated and wound to obtain DTY (4) ATY air-changing, i.e. the DTY elastic fiber, the colored polyester FDY strong fiber and the wool acrylic A50 / W50 fiber are hung in the form of core-sheath yarn, the core yarn and the sheath yarn are fed through the feeding rollers respectively, and in the air-changing box, the core yarn is first humidified by the nozzle wetting head and then enters the air-changing nozzle together with the sheath yarn, and is mixed into a strand in the air-changing nozzle by high-intensity compressed air injection to form an air-changing primary yarn, and the air-changing primary yarn is passed through the main roller, the auxiliary roller, and rolled for oiling to obtain the regenerated wool acrylic polyester blended flower velvet differentiated fiber.

[0009] In an optional embodiment, in the step (1), the spinning temperature of the first spinning box is 285°C, and the spinning speed is 3100 m / min; the temperature of the side-blowing air of the first cooling side-blowing system is 25°C, the wind speed is 0.5 m / s, and the wind pressure is 50 Pa; and the oiling height is 950 mm.

[0010] In an optional embodiment, in the step (2), the spinning temperature of the second spinning box is 286°C, and the spinning speed is 4100 m / min; the temperature of the side blowing air of the second cooling side blowing system is 25°C, the wind speed is 0.55 m / s, and the wind pressure is 50 Pa; and the oiling height is 1200 mm.

[0011] In an optional embodiment, the stretching ratio in step (3) is 1.69, the D / Y ratio of the false twist is 1.7; the processing speed is 450 m / min; the temperature of the first hot box is 195°C, and the temperature of the second hot box is 165°C.

[0012] In an optional embodiment, the core yarn of the sheath-core yarn in step (4) is a DTY stretch fiber and a wool acrylic A50 / W50 fiber, and the sheath yarn is a colored polyester FDY strong fiber.

[0013] In an optional embodiment, in step (4), the mass percentage of the core wire is 56%, and the mass percentage of the skin wire is 44%.

[0014] In an optional embodiment, the working speed of the main roller in step (4) is 220-260 m / min; the overfeed rate of the core wire is 10%-20%; and the overfeed rate of the skin wire is 40%-80%.

[0015] In an optional embodiment, the pressure of the high-intensity compressed air in step (4) is 0.6-0.8 MPa, and the flow rate of the air flow is 500-800 m / s.

[0016] In a second aspect, the disclosed embodiments also provide a regenerated wool acrylic polyester blended velvet differentiated fiber, which is prepared by the method described above.

[0017] In an optional embodiment, the strength of the regenerated wool acrylic polyester blended velvet differentiated fiber is greater than 1.2 cN / dtex, the elongation at break is 16%-20%, and the curl shrinkage is 6%-7.5%.

[0018] The beneficial effect of the present invention is that the regenerated wool acrylic polyester blended velvet differentiated fiber and its preparation method obtain colored polyester FDY strong fiber through the FDY process, which improves the problem that polyester long fiber cannot be combined with wool fiber. At the same time, through the ATY air change of the core-sheath silk hanging silk, the DTY elastic fiber and the wool acrylic A50 / W50 fiber can extend out of the cortex and twist with the colored polyester FDY strong fiber to form a large loop. While having the soft and delicate feel of wool fiber, it also takes into account the elasticity and wear resistance of polyester fiber, is not easy to be broken and pilling, and takes into account breathability while keeping warm.

[0019] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic diagram of the structure of a regenerated wool-acrylic-polyester blended velvet differentiated fiber provided in an embodiment of the present disclosure; Figure 2 A yarn cone diagram of a regenerated wool, acrylic and polyester blended velvet differentiated fiber provided in an embodiment of the present disclosure; In the figure: 1. FDY leather yarn with large loops, that is, colored polyester FDY strong fiber; 2. DTY elastic fiber core yarn, that is, DTY elastic fiber; 3. Wool acrylic A50 / W50 core yarn, that is, wool acrylic A50 / W50 fiber. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0024] As used herein, the phrases "in one embodiment," "according to one embodiment," "in some embodiments," and the like generally refer to the fact that the particular feature, structure, or characteristic following the phrase may be included in at least one embodiment of the present disclosure. Therefore, a particular feature, structure, or characteristic may be included in more than one embodiment of the present disclosure, so that these phrases do not necessarily refer to the same embodiment. As used herein, the terms "example," "exemplary," and the like are used to "serve as an example, instance, or illustration." Any implementation, aspect, or design described herein as "example" or "exemplary" is not necessarily to be construed as preferred or superior to other implementations, aspects, or designs. On the contrary, the use of the terms "example," "exemplary," and the like is intended to present concepts in a concrete manner.

[0025] Herein, example embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. As used herein, expressions such as "at least one of..." modify the entire list of elements when following a list of elements, rather than modifying individual elements in the list. For example, the expression "at least one of a, b, and c" should be understood to include only a, only b, only c, both a and b, both a and c, both b and c, or all of a, b, and c.

[0026] The terms used herein are only used to describe specific exemplary configurations and are not intended to be limited. As used herein, the singular articles "one", "an" and "the" may also be intended to include plural forms, unless it is clearly indicated above that this is not the case. The terms "comprise", "include" and "have" are inclusive, and therefore specify the presence of features, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components and / or combinations thereof. The method steps, processes and operations described herein should not be interpreted as necessarily requiring them to be performed in the specific order discussed or shown, unless specifically identified as an execution order. Additional or alternative steps may be adopted.

[0027] The disclosed embodiment provides a method for preparing a differentiated fiber of a regenerated wool, acrylic and polyester blended velvet, comprising the following steps: (1) spinning colored polyester POY, namely, recyclable regenerated chips and masterbatches are placed in a silo for drying, then melted in a screw extruder, mixed in a mixer, and then sent to a first spinning box, sprayed out from a spinneret hole on a spinneret, solidified into filaments by a first cooling side-blowing system, oiled and bundled, and then wound and formed to obtain colored polyester POY filaments; (2) spinning colored polyester FDY, namely, recyclable regenerated chips and masterbatches are placed in a silo for drying, then melted in a screw extruder, mixed in a mixer, and then sent to a first spinning box, sprayed out from a spinneret hole on a spinneret, solidified into filaments by a first cooling side-blowing system, oiled and bundled, and then wound and formed to obtain colored polyester POY filaments; The colored polyester POY yarn is put into a silo for drying, then melted in a screw extruder, mixed in a mixer, and then sent to a second spinning box, sprayed out from the spinneret holes on the spinneret, solidified by a second cooling side blowing system, stretched and shaped by the first and second stretching hot rollers, oiled and bundled, and then wound to obtain colored polyester FDY strong fiber; (3) core yarn DTY stretching, that is, the colored polyester POY yarn is stretched and false-twisted, heated in a first hot box, cooled, false-twisted and untwisted, heated in a second hot box, shaped, lubricated and wound to obtain DTY (4) ATY air-changing, i.e. the DTY elastic fiber, the colored polyester FDY strong fiber and the wool acrylic A50 / W50 fiber are hung in the form of core-sheath yarn, the core yarn and the sheath yarn are fed through the feeding rollers respectively, and in the air-changing box, the core yarn is first humidified by the nozzle wetting head and then enters the air-changing nozzle together with the sheath yarn, and is mixed into a strand in the air-changing nozzle by high-intensity compressed air injection to form an air-changing primary yarn, and the air-changing primary yarn is passed through the main roller, the auxiliary roller, and rolled for oiling to obtain the regenerated wool acrylic polyester blended flower velvet differentiated fiber.

[0028] In some embodiments, specifically, FDY leather yarn large loops can also be called colored polyester FDY strong fiber or FDY strength fiber; DTY elastic fiber core yarn can also be called DTY elastic fiber or DTY strength fiber loop yarn; wool acrylic A50 / W50 core yarn can also be called wool acrylic A50 / W50 fiber.

[0029] In some embodiments, specifically, the colored polyester POY yarn is specifically POY pre-oriented fiber of PET, the DTY elastic fiber is specifically DTY elastic fiber of PET, and the colored polyester FDY strong fiber is specifically FDY strong fiber of PET.

[0030] In some embodiments, specifically, Figure 1As shown, the core yarn of the core-sheath yarn is a DTY elastic fiber and a wool acrylic A50 / W50 fiber, the sheath yarn is a colored polyester FDY strong fiber, the surface of the core yarn DTY strength fiber has terry yarn, the surface of the wool acrylic A50 / W50 fiber has fluff, and the surface of the sheath FDY strength fiber has terry yarn, wherein the terry yarn of the core yarn DTY strength fiber and the fluff of the wool acrylic A50 / W50 fiber extend out of the sheath and are entangled with the terry yarn of the FDY strength fiber.

[0031] In some embodiments, preferably, the surface of the regenerated wool acrylic polyester blended velvet differentiated fiber is coated with a grease layer.

[0032] In some embodiments, specifically, when spinning POY fiber and FDY fiber, the drying and heating temperature of the chips is 155° C.-165° C., and the drying and heating temperature of the masterbatch is 125° C.-135° C.

[0033] In some embodiments, specifically, in step (1), the spinning temperature of the first spinning box is 285°C, and the spinning speed is 3100 m / min; the temperature of the side-blowing air of the first cooling side-blowing system is 25°C, the wind speed is 0.5 m / s, and the wind pressure is 50 Pa; and the oiling height is 950 mm.

[0034] In some embodiments, specifically, the oil product selected for oiling the POY fiber is "Takemoto DELION HQ-4070 oil", and the oiling rate is 0.3%-0.5%.

[0035] In some embodiments, specifically, in step (2), the spinning temperature of the second spinning box is 286°C, and the spinning speed is 4100 m / min; the temperature of the side blowing air of the second cooling side blowing system is 25°C, the wind speed is 0.55 m / s, and the wind pressure is 50 Pa; and the oiling height is 1200 mm.

[0036] In some embodiments, specifically, the oil product selected for oiling the FDY fiber is "Takemoto DELION HQ-2039 oil", and the oiling rate is 0.7%-1.3%.

[0037] In some embodiments, specifically, the stretching ratio in step (3) is 1.69, the D / Y ratio of false twist is 1.7; the processing speed is 450 m / min; the temperature of the first hot box is 195° C., and the temperature of the second hot box is 165° C.

[0038] In some embodiments, specifically, in step (4), the mass percentage of the core wire is 56%, and the mass percentage of the skin wire is 44%.

[0039] In some embodiments, specifically, the filaments undergo tensile deformation, thermal deformation and the like under the combined effects of heat, twisting torsional force and tensile force (stretching multiple is 1.69); when the filaments enter the cooling plate, the thermal deformation of the filaments is fixed and their thermoplasticity is reduced, so that the filaments have a certain rigidity, which is conducive to twist transmission; after passing through the false twister, the filaments are twisted and untwisted by the steering of the friction disk, thereby forming a false twist effect; under the action of the second roller, the filaments are fed into the second hot box with a temperature of 165°C, and the second hot box completes the shaping effect, eliminates the internal stress of the deformed yarn, and improves the dimensional stability of the fiber; after passing through the third roller, the filaments are shaped in a relatively relaxed state, eliminating most of the internal stress in the deformation, so that the fiber has a certain bulkiness and elasticity.

[0040] In some embodiments, specifically, the oil product selected for oiling the DTY fiber is "Chuanhua TF-702T polyester DTY oil", and the oiling rate is 2.5%-3.5%.

[0041] In some embodiments, specifically, after the fiber bundle passes through the core wire roller and the skin wire roller, it enters the air change box, the core wire is humidified by the nozzle wetting head and then passes into the wire inlet of the deformation nozzle together with the skin wire, the compressed air valve is opened, and the fiber bundle is blown open and messed up by the compressed air flow, so that the single wires are separated in parallel, and when leaving the nozzle wire outlet, the fiber bundle hits the ball baffle and turns 90° to generate a curved arc circle, and entanglement occurs between the fiber wires to form a certain network and loops.

[0042] In some embodiments, specifically, in step (4), the working speed of the main roller is 220-260 m / min; the overfeed rate of the core yarn is 10%-20%; and the overfeed rate of the skin yarn is 40%-80%.

[0043] In some embodiments, specifically, in step (4), the pressure of the high-intensity compressed air is 0.6-0.8 MPa, and the flow rate of the air flow is 500-800 m / s.

[0044] In some embodiments, specifically, the oil product "Takemoto TRICOL M-2084-ANI air-variable yarn oil" selected for oiling the ATY air-variable yarn has an oiling rate of 0.5%-1.0%.

[0045] The disclosed embodiment also provides a regenerated wool acrylic polyester blended velvet differentiated fiber, which is prepared by the method described above.

[0046] Example (1) The masterbatch and slices in this embodiment are dried at a temperature of 155°C to 165°C, and the dried masterbatch is added at a ratio of 3% to 5% of the number of slices together with the dried slices into a screw extruder, and the temperature is controlled by a temperature sensor (the temperature is 286°C). The masterbatch and slices are melted, and the whole melt is heated by a biphenyl boiler to produce biphenyl for heat preservation. After the melt reaches the spinning box, it is finally filtered by a metering pump and a spinning assembly, mixed evenly and distributed to each spinneret (the number of spinneret holes is 48), forming a uniform stream that is ejected from the spinneret hole, and solidified into filaments through a cooling side blowing system (the side blowing air temperature is 25°C, the wind speed is 0.55m / s, and the wind pressure is 50Pa), and then oiled and bundled (the oiling height is 1200mm) to improve the cohesion and winding of the filament bundle and eliminate static electricity, and then stretched and shaped by the first hot roller and the second hot roller (the temperature of the first hot roller is 88°C and the speed is 1650m / min, the temperature of the second hot roller is 140°C and the speed is 4100m / min), and finally wound by a winder to obtain FDY fiber, and the FDY fiber spinning speed is 4100m / min.

[0047] (2) The masterbatch and the slices in this embodiment are dried at a temperature of 155°C to 165°C. The dried masterbatch is added into a screw extruder at a ratio of 3% to 5% of the number of slices together with the dried slices. The temperature is controlled by a temperature sensor (the temperature is 285°C) to melt the slices. The entire melt is heated by a biphenyl boiler to produce biphenyl for heat preservation. After the melt reaches the spinning manifold, it is finally filtered by a metering pump and a spinning assembly. After being evenly mixed, it is distributed to each spinneret (the number of spinneret holes is 36 holes) to form a uniform thin stream that is ejected from the spinneret hole. After passing through a cooling side blowing system (the side blowing air temperature is 25°C, the wind speed is 0.5m / s, and the wind pressure is 50Pa), it is solidified into a filament, and then oiled and bundled (the oiling height is 950mm) to improve the cohesion and windability of the filament bundle and eliminate static electricity. Finally, it is wound and formed by a winder to obtain POY fiber. The spinning speed of POY fiber is 3100m / min.

[0048] (3) The two fiber bundles obtained in step (2) are fed into the first roller of the DTY texturing machine, stretched by the second roller (stretching multiple is 1.69), and subjected to false twisting (D / Y ratio is 1.7) transmitted by the false twister, and then enter the first hot box (hot box temperature is 195°C). In the first hot box, due to the combined action of heat, twisting torsion force and stretching force, stretching deformation, thermal deformation and other changes occur. Then, the fiber bundles enter the cooling plate to fix the thermal deformation of the fiber bundles. Then, the two strands of fiber bundles enter the S-twist false twister and the Z-twist false twister respectively. The fiber bundles are twisted and untwisted by the steering of the friction disk. Then, the fiber bundles are fed into the second hot box (hot box temperature is 165°C) to complete the shaping, eliminate the internal stress of the deformed fiber, and improve the dimensional stability of the fiber. Then, the fiber bundles pass through the third roller to be shaped in a relatively relaxed state, eliminate most of the internal stress in the deformation, and make the fiber have a certain bulkiness and elasticity. The elastic yarn is lubricated by an oil tanker (the oiling rate is 2.5%-3.5%) and then wound to obtain DTY elastic fiber. The elasticizing speed is 450m / min.

[0049] (4) Feeding a fiber tow obtained in step (3) and a purchased wool acrylic fiber A50 / W50 fiber tow from the ATY air-changing machine core wire roller into the air-changing box, and feeding a fiber tow obtained in step (1) from the ATY The leather roller of the air-transformer is fed into the air-transformer box. The core wire is humidified by the nozzle wetting head and then penetrates into the wire inlet of the deformation nozzle together with the leather wire. Then the compressed air valve is opened (the pressure of the compressed air is 0.6-0.8Mpa, and the flow rate of the air flow is 500-800m / s). The fiber bundles are blown open and tangled by the compressed air flow, so that the single wires are separated in parallel. When leaving the nozzle wire outlet, the fiber bundles hit the baffle ball and turn 90° to generate a curved arc circle, and entanglement occurs between the fiber yarns to form a certain network and loops, and then they are rolled and oiled through the axial direction of the oil tanker. Finally, they are wound and formed by the winding device to obtain a soft, delicate and fluffi wool acrylic polyester blended air-textured yarn with a high fluffiness. The air-transformation speed is 220-260m / min.

[0050] Specifically, Figure 2 As shown, it is a yarn tube diagram of the regenerated wool acrylic polyester blended velvet differentiated fiber obtained in this embodiment.

[0051] In summary, the regenerated wool acrylic polyester blended flower velvet differentiated fiber and its preparation method obtain colored polyester FDY strong fiber through the FDY process, which improves the problem that polyester long fiber cannot be combined with wool fiber. At the same time, through the ATY air change of the core-sheath silk hanging silk, the DTY elastic fiber and the wool acrylic A50 / W50 fiber can extend out of the cortex and twist with the colored polyester FDY strong fiber to form a large loop. While having the soft and delicate feel of wool fiber, it also takes into account the elasticity and wear resistance of polyester fiber, is not easy to be torn and pilling, and takes into account breathability while keeping warm.

[0052] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A method for preparing differentiated fibers of regenerated wool, acrylic and polyester blended velvet, characterized in that: The steps include: (1) Spinning colored polyester POY, i.e., recyclable chips and masterbatch are placed in a silo for drying, then melted in a screw extruder, mixed in a mixer, and then sent to a first spinning box, ejected from the spinneret holes on the spinneret, solidified into filaments by a first cooling side-blowing system, and then oiled and bundled for winding to obtain colored polyester POY filaments; (2) Spinning colored polyester FDY, i.e., recyclable chips and masterbatch are placed in a silo for drying, then melted in a screw extruder, mixed in a mixer, and then sent to a second spinning box, ejected from the spinneret holes on the spinneret, solidified by a second cooling side-blowing system, stretched and shaped by a first and second stretching hot rollers, oiled and bundled, and then wound to obtain colored polyester FDY strong fiber; (3) core yarn DTY stretching, i.e., stretching and false twisting the colored polyester POY yarn, heating it in a first hot box, cooling it, false twisting and untwisting it, heating it in a second hot box, shaping it, lubricating it with oil, and winding it to obtain DTY elastic fiber; (4) ATY air-changing, i.e. the DTY elastic fiber, the colored polyester FDY strong fiber and the wool acrylic A50 / W50 fiber are hung in the form of core-sheath yarn, the core yarn and the sheath yarn are fed through the feeding rollers respectively, and in the air-changing box, the core yarn is first humidified by the nozzle wetting head and then enters the air-changing nozzle together with the sheath yarn, and is mixed into one strand by high-intensity compressed air injection in the air-changing nozzle to form an air-changing primary yarn, and the air-changing primary yarn is passed through the main roller, the auxiliary roller, and rolled for oiling to obtain the regenerated wool acrylic polyester blended flower velvet differentiated fiber.

2. The method for preparing the differentiated fiber of regenerated wool, acrylic and polyester blended velvet according to claim 1, characterized in that: In step (1) The spinning temperature of the first spinning beam is 285°C and the spinning speed is 3100 m / min; The temperature of the side-blowing air of the first cooling side-blowing system is 25°C, the wind speed is 0.5m / s, and the wind pressure is 50 Pa; The oiling height is 950 mm.

3. The method for preparing the differentiated fiber of regenerated wool, acrylic and polyester blended velvet according to claim 1, characterized in that: In step (2) The spinning temperature of the second spinning beam is 286°C and the spinning speed is 4100 m / min; The temperature of the side-blowing wind of the second cooling side-blowing system is 25°C, the wind speed is 0.55m / s, and the wind pressure is 50 Pa; The oiling height is 1200 mm.

4. The method for preparing the differentiated fiber of regenerated wool, acrylic and polyester blended velvet according to claim 1, characterized in that: In step (3) The stretching ratio is 1.69, and the D / Y ratio of the false twist is 1.7; The processing speed is 450m / min; The temperature of the first heat box is 195°C, and the temperature of the second heat box is 165°C.

5. The method for preparing the differentiated fiber of regenerated wool, acrylic and polyester blended velvet according to claim 1, characterized in that: In step (4) The core yarn of the sheath-core yarn is a DTY elastic fiber and a wool acrylic A50 / W50 fiber, and the sheath yarn is a colored polyester FDY strong fiber.

6. The method for preparing the differentiated fiber of regenerated wool, acrylic and polyester blended velvet according to claim 1, characterized in that: In step (4) The mass percentage of the core wire is 56%, and the mass percentage of the skin wire is 44%.

7. The method for preparing the regenerated wool acrylic polyester blended velvet differentiated fiber according to claim 1, characterized in that: In step (4) The working speed of the main roller is 220-260m / min; The overfeed rate of the core wire is 10%-20%; The overfeed rate of the leather wire is 40%-80%.

8. The method for preparing the differentiated fiber of regenerated wool, acrylic and polyester blended velvet according to claim 1, characterized in that: In step (4) The pressure of the high-strength compressed air is 0.6-0.8 MPa, and the flow rate of the air flow is 500-800 m / s.

9. A regenerated wool acrylic polyester blended velvet differential fiber, characterized in that: The method is prepared by the method according to any one of claims 1 to 8.

10. The regenerated wool-acrylic-polyester blended velvet differential fiber according to claim 9, characterized in that: The strength of the regenerated wool acrylic polyester blended velvet differentiated fiber is greater than 1.2 cN / dtex, the elongation at break is 16%-20%, and the curling shrinkage is 6%-7.5%.

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