Regenerated cellulose fiber blended yarn and efficient air-jet spinning process thereof

Abstract

The invention relates to the technical field of spinning, and particularly discloses regenerated cellulose fiber blended yarn and an efficient air-jet spinning process thereof. The regenerated cellulose fiber blended yarn comprises the following raw materials in parts by weight: 60-70 parts of regenerated cellulose fibers, 10-20 parts of diacetate fibers and 5-15 parts of Lyocell bamboo fibers. The diacetate fibers are modified by polyethylene glycol; according to the prepared blended yarn, the diacetate fibers, the Lyocell bamboo fibers and the regenerated cellulose fibers are blended, the strength and the evenness of the yarn can be improved, meanwhile, the gloss, the hand feeling and the thermal stability of the yarn are improved, good strength can be kept at the high temperature, and the spinning efficiency and the yarn quality can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of spinning, and in particular to a regenerated cellulose fiber blended yarn and a high-efficiency jet spinning process thereof. Background Art

[0002] As an environmentally friendly and high-performance textile raw material, regenerated cellulose fiber is widely used in the textile industry. Common regenerated cellulose fiber spinning processes mostly use ring spinning or rotor spinning. The traditional ring spinning method prepares yarn through mechanical drafting and twisting. Although it can achieve higher strength, it has low production efficiency and high energy consumption. Another common method is rotor spinning, which uses a high-speed rotating rotor to condense the fibers into yarn. The production efficiency is relatively high, but the strength and uniformity of the yarn are damaged. Summary of the invention

[0003] In order to improve yarn quality and simultaneously increase spinning efficiency, the present application provides a regenerated cellulose fiber blended yarn and a high-efficiency jet spinning process thereof.

[0004] In the first aspect, the present application provides a regenerated cellulose fiber blended yarn, which adopts the following technical solution: A regenerated cellulose fiber blended yarn comprises the following raw materials in parts by weight: 60-70 parts of regenerated cellulose fiber, 10-20 parts of diacetate fiber, and 5-15 parts of rabbeted bamboo fiber; the diacetate fiber is modified by polyethylene glycol.

[0005] By adopting the above technical scheme, the diacetate fiber and the regenerated cellulose fiber are compounded to improve the strength and uniformity of the yarn. At the same time, the diacetate fiber can improve the gloss, feel and thermal stability of the yarn, and can maintain good strength at high temperatures. Lai bamboo fiber has good softness and strength, and also has natural antibacterial and bactericidal properties, good spinnability, and improves spinning efficiency and yarn quality. Polyethylene glycol can reduce the interaction between the molecular chains of diacetate fiber, enhance the mobility of diacetate cellulose molecular segments, reduce the melting point and crystallinity of diacetate fiber, improve the spinnability of diacetate fiber, reduce the phenomenon that diacetate fiber is easily broken during high-temperature spinning, and improve the spinning stability of diacetate fiber.

[0006] Preferably, the regenerated cellulose fiber is at least one of viscose fiber, lyocell fiber and modal fiber.

[0007] By adopting the above technical solution, viscose fiber has good hygroscopicity and softness. Lyocell fiber has high wet strength, can maintain high spinning efficiency and yarn strength, yarn uniformity, and good moisture absorption and air permeability during the spinning process. Modal fiber has high wet strength and good softness, can form uniform and strong yarn during the spinning process, and maintain good spinning efficiency.

[0008] Preferably, the viscose fiber spinning solution comprises the following raw materials in parts by weight: 10-20 parts of animal protein, 1-5 parts of a cross-linking agent, 5-10 parts of a reinforcing agent, and 80-100 parts of viscose stock solution.

[0009] By adopting the above technical solution, the peptide bonds of the protein in the animal protein can form hydrogen bonds with the hydroxyl groups of the cellulose in the viscose stock solution, generating a strong molecular binding force, which can make the viscose fiber have better strength and a more stable fiber structure, and improve the spinning efficiency. Animal protein can also improve the moisture absorption, air permeability and comfort of viscose fiber, reduce the breakage of fiber during spinning, and improve the comfort and spinning efficiency of fiber spinning. The combination of crosslinking agent and reinforcing agent can improve the strength and wear resistance of viscose fiber, improve the uniformity of fiber yarn, reduce the breakage of fiber during spinning, and thus improve the spinning efficiency.

[0010] Preferably, the method for preparing the viscose fiber comprises the following specific steps: The animal protein is mixed with alkali solution, heated to 70-80°C and stirred to form an animal protein solution; the animal protein solution and the cross-linking agent are mixed, and then mixed with the reinforcing agent and the viscose stock solution, stirred evenly to form a spinning stock solution, and viscose fibers are obtained after spinning.

[0011] Preferably, the animal protein is one of keratin, gelatin and silk protein.

[0012] Preferably, the cross-linking agent is epichlorohydrin.

[0013] By adopting the above technical scheme, epichlorohydrin can react with the hydroxyl groups on the fiber surface, promote the grafting reaction between animal protein and the surface of viscose fiber, form a cross-linked network, enhance the structural stability of viscose fiber, improve the dry and wet strength of fiber, reduce the breakage rate of fiber in the spinning process, and thus improve spinning efficiency.

[0014] Preferably, the reinforcing agent comprises amino resin and ammonium sulfate.

[0015] By adopting the above technical scheme, the amino resin can form hydrogen bonds with the viscose fiber to enhance the strength of the viscose fiber, and ammonium sulfate can promote the curing of the amino resin and reduce the generation of gel, thereby improving the spinnability and spinning efficiency of the fiber.

[0016] In a second aspect, the present application provides a spinning process for regenerated cellulose fiber blended yarn, which adopts the following technical solution: A spinning process for regenerated cellulose fiber blended yarn comprises the following specific steps: Regenerated cellulose fiber, diacetate fiber, polyethylene glycol and bamboo fiber are mixed, and then flexibly opened and flexibly carded. Then, air-jet spinning is carried out, and double nozzles with large drafting multiples and strong airflow are used for wrapping and twisting to form continuous yarn. The yarn is shaped and wound to obtain the finished yarn.

[0017] By adopting the above technical scheme and combining a variety of regenerated fibers, the regenerated fibers can have both good strength and spinnability. At the same time, combined with the spray spinning process, the spinning efficiency of the regenerated fibers can be improved, and the strength and evenness of the yarn can be enhanced.

[0018] Preferably, the mass ratio of the polyethylene glycol to diacetate fiber is (0.1-0.3):1.

[0019] In summary, this application has the following beneficial effects: 1. Since the present application uses Lai bamboo fiber, diacetate fiber and regenerated cellulose fiber in combination, the fiber can have both good strength and spinnability, and improve the spinning efficiency and yarn strength of the fiber. At the same time, the diacetate fiber is modified with polyethylene glycol, which can reduce the melting point and crystallinity of the diacetate fiber, reduce the phenomenon that the diacetate fiber is easily broken during high-temperature spinning, and improve the spinning stability of the diacetate fiber.

[0020] 2. In this application, animal protein is added to the spinning solution of viscose fiber to enhance the moisture absorption, air permeability and comfort of viscose fiber and reduce the breakage of fiber during spinning. The cross-linking agent and reinforcing agent are compounded to improve the strength and wear resistance of viscose fiber and improve the spinning efficiency. DETAILED DESCRIPTION

[0021] The present application is further described in detail below with reference to the embodiments.

[0022] All raw materials in the examples are commercially available. Example

[0023] Example 1 This embodiment provides a regenerated cellulose fiber blended yarn, including the following raw materials by weight: 65kg regenerated cellulose fiber, 15kg diacetate fiber, and 10kg Lai bamboo fiber. The regenerated cellulose fiber is viscose fiber, the viscose fiber is purchased from Jilin Chemical Fiber Viscose Staple Fiber, the length of the viscose fiber is 38mm, the length of the diacetate fiber is 39.5mm, and the length of the Lai bamboo fiber is polyethylene glycol 400.

[0024] The efficient air-jet spinning process for regenerated cellulose fiber blended yarn includes the following specific steps: After regenerated cellulose fiber, diacetate fiber, polyethylene glycol and Lai bamboo fiber are mixed, the mass ratio of polyethylene glycol to diacetate fiber is 0.2:1, and flexible opening and flexible carding are carried out, and then jet spinning is carried out. The spinning speed is 210m / min, the total draft is 165 times, the main draft is 35.8 times, the nozzle air pressure ratio is 0.25, the un-input ratio is 0.98, the winding ratio is 0.99, the collector is 2mm, and continuous yarn is formed. The spun yarn is shaped and wound to obtain the finished yarn.

[0025] Example 2 The difference between Example 2 and Example 1 is that the amount of regenerated cellulose fiber used in the regenerated cellulose fiber blended yarn raw material is 60 kg, the amount of diacetate fiber used is 20 kg, and the amount of Lai bamboo fiber used is 5 kg.

[0026] Example 3 The difference between Example 3 and Example 1 is that the amount of regenerated cellulose fiber used in the regenerated cellulose fiber blended yarn raw material is 70 kg, the amount of diacetate fiber used is 10 kg, and the amount of Lai bamboo fiber used is 15 kg.

[0027] Example 4 The difference between Example 4 and Example 1 is that the mass ratio of polyethylene glycol to diacetate fiber in the raw material of the regenerated cellulose fiber blended yarn is 0.1:1.

[0028] Example 5 The difference between Example 5 and Example 1 is that the mass ratio of polyethylene glycol to diacetate fiber in the raw material of the regenerated cellulose fiber blended yarn is 0.3:1.

[0029] Example 6 The difference between Example 6 and Example 1 is that the regenerated cellulose fiber in the regenerated cellulose fiber blended yarn raw material is lyocell fiber.

[0030] Example 7 The difference between Example 7 and Example 1 is that the regenerated cellulose fiber in the regenerated cellulose fiber blended yarn raw material is a mixture of viscose fiber, lyocell fiber and modal fiber, wherein the mass ratio of viscose fiber, lyocell fiber and modal fiber is 1:1:1.

[0031] Example 8 The difference between Example 8 and Example 7 is that the viscose fiber spinning solution includes the following raw materials in parts by weight: 15 kg of animal protein, 3 kg of cross-linking agent, 8 kg of reinforcing agent, and 90 kg of viscose solution, wherein the animal protein is silk protein, the cross-linking agent is epichlorohydrin, the reinforcing agent is amino resin and ammonium sulfate, the mass ratio of amino resin to ammonium sulfate is 1:0.1, and the amino resin is melamine formaldehyde resin.

[0032] The efficient air-jet spinning process for regenerated cellulose fiber blended yarn includes the following specific steps: S1: Mix animal protein with alkali solution, which is a 1.0% sodium hydroxide aqueous solution, heat to 75°C, stir and dissolve for 15 minutes to form an animal protein solution; mix the animal protein solution and the cross-linking agent, stir evenly, and then mix with the amino resin, ammonium sulfate and viscose stock solution, stir evenly, filter to form a spinning stock solution, and obtain viscose fiber after spinning.

[0033] S2: After viscose fiber, lyocell fiber, modal fiber, diacetate fiber, polyethylene glycol, and lyocell bamboo fiber are mixed, the mass ratio of polyethylene glycol to diacetate fiber is 0.2:1, and flexible opening and flexible carding are performed, and then jet spinning is performed. The spinning speed is 210m / min, the total draft is 165 times, the main draft is 35.8 times, the nozzle air pressure ratio is 0.25, the un-input ratio is 0.98, the winding ratio is 0.99, the collector is 2mm, and continuous yarn is formed. The spun yarn is shaped and wound to obtain the finished yarn.

[0034] Example 9 The difference between Example 9 and Example 8 is that the amount of animal protein used in the viscose fiber spinning solution is 10 kg, the amount of cross-linking agent used is 5 kg, the amount of reinforcing agent used is 5 kg, and the amount of viscose solution used is 80 kg.

[0035] Example 10 The difference between Example 10 and Example 8 is that the amount of animal protein used in the viscose fiber spinning solution is 20 kg, the amount of cross-linking agent used is 1 kg, the amount of reinforcing agent used is 10 kg, and the amount of viscose solution used is 100 kg.

[0036] Embodiment 11 The difference between Example 11 and Example 8 is that the animal protein in the spinning solution of the viscose fiber is keratin.

[0037] Example 12 The difference between Example 12 and Example 8 is that no reinforcing agent is used in the spinning solution of the viscose fiber.

[0038] The efficient air-jet spinning process for regenerated cellulose fiber blended yarn includes the following specific steps: S1: Mix animal protein with alkali solution, which is a 1.0% sodium hydroxide aqueous solution, heat to 75°C, stir and dissolve for 15 minutes to form an animal protein solution; mix the animal protein solution and the cross-linking agent, stir evenly, and then mix with the viscose stock solution, stir evenly, filter to form a spinning stock solution, and obtain viscose fiber after spinning.

[0039] S2: After viscose fiber, lyocell fiber, modal fiber, diacetate fiber, polyethylene glycol, and lyocell bamboo fiber are mixed, the mass ratio of polyethylene glycol to diacetate fiber is 0.2:1, and flexible opening and flexible carding are performed, and then jet spinning is performed. The spinning speed is 210m / min, the total draft is 165 times, the main draft is 35.8 times, the nozzle air pressure ratio is 0.25, the un-input ratio is 0.98, the winding ratio is 0.99, the collector is 2mm, and continuous yarn is formed. The spun yarn is shaped and wound to obtain the finished yarn.

[0040] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that polyethylene glycol is not used to modify the diacetate fiber in the regenerated cellulose fiber blended yarn raw material.

[0041] The efficient air-jet spinning process for regenerated cellulose fiber blended yarn includes the following specific steps: After regenerated cellulose fiber, diacetate fiber, polyethylene glycol and Lai bamboo fiber are mixed, the mass ratio of polyethylene glycol to diacetate fiber is 0.2:1, and flexible opening and flexible carding are carried out, and then jet spinning is carried out. The spinning speed is 210m / min, the total draft is 165 times, the main draft is 35.8 times, the nozzle air pressure ratio is 0.25, the un-input ratio is 0.98, the winding ratio is 0.99, the collector is 2mm, and continuous yarn is formed. The spun yarn is shaped and wound to obtain the finished yarn.

[0042] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that no bamboo fiber is used in the raw material of the regenerated cellulose fiber blended yarn.

[0043] Performance testing According to the regenerated cellulose fiber blended yarn provided by Examples 1-12 and Comparative Examples 1-2 of the present application, the following performance tests were performed, and the specific test results are shown in Table 1.

[0044] Detection Methods 1. Powerful performance With reference to GB / T3916-2013 "Determination of breaking strength and breaking elongation of single yarn of textile packaged yarn - CRE method", no less than 30 samples are tested, and the test average value is taken to determine the wet breaking strength and dry breaking strength of the regenerated cellulose fiber blended yarn sample prepared in this application.

[0045] 2. Strip uniformity With reference to the standard of GB / T3292.1-2008 "Test method for unevenness of yarn of textiles - Part 1: capacitance method", the coefficient of variation of yarn evenness of the regenerated cellulose fiber blended yarn sample prepared in the present application was tested.

[0046] Table 1: Performance test results data table It can be seen from the performance test results that the regenerated cellulose fiber blended yarn prepared in the present application improves the spinnability of the fiber by mixing Lai bamboo fiber, diacetate fiber and regenerated cellulose fiber. Under the synergistic compounding of the jet spinning process, the prepared yarn has good strength and uniformity of yarn. It can be seen from Examples 8-11 that by compounding animal protein, crosslinking agent and reinforcing agent, the spinnability of the fiber can be improved, the breakage of the fiber during spinning can be reduced, and the strength of the viscose fiber can be improved. It can be seen from the comparison of Example 12 and Example 8 that adding an appropriate amount of reinforcing agent to the viscose fiber spinning solution can significantly improve the strength of the viscose fiber, thereby improving the wet breaking strength and dry breaking strength of the yarn.

[0047] By comparing Comparative Examples 1-2 with Example 1, it can be seen that Comparative Example 1 does not use polyethylene glycol to modify the diacetate fiber, and Comparative Example 2 does not use Lai bamboo fiber. From the performance test results, it can be seen that the wet breaking strength and dry breaking strength of the yarn are significantly reduced, especially the strength of the yarn prepared in Comparative Example 2 is significantly damaged, further illustrating that Lai bamboo fiber has a significant effect on improving the strength of the blended yarn.

[0048] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A regenerated cellulose fiber blended yarn, characterized in that: The invention comprises the following raw materials in parts by weight: 60-70 parts of regenerated cellulose fiber, 10-20 parts of diacetate fiber and 5-15 parts of rabbeted bamboo fiber; the diacetate fiber is modified by polyethylene glycol.

2. The regenerated cellulose fiber blended yarn according to claim 1, characterized in that: The regenerated cellulose fiber is at least one of viscose fiber, lyocell fiber and modal fiber.

3. The regenerated cellulose fiber blended yarn according to claim 2, characterized in that: The viscose fiber spinning solution comprises the following raw materials in parts by weight: 10-20 parts of animal protein, 1-5 parts of a cross-linking agent, 5-10 parts of a reinforcing agent, and 80-100 parts of viscose stock solution.

4. The regenerated cellulose fiber blended yarn according to claim 3, characterized in that: The method for preparing the viscose fiber comprises the following specific steps: The animal protein is mixed with alkali solution, heated to 70-80°C and stirred to form an animal protein solution; the animal protein solution and the cross-linking agent are mixed, and then mixed with the reinforcing agent and the viscose stock solution, stirred evenly to form a spinning stock solution, and viscose fibers are obtained after spinning.

5. The regenerated cellulose fiber blended yarn according to claim 3, characterized in that: The animal protein is one of keratin, gelatin and silk protein.

6. The regenerated cellulose fiber blended yarn according to claim 3, characterized in that: The cross-linking agent is epichlorohydrin.

7. The regenerated cellulose fiber blended yarn according to claim 3, characterized in that: The reinforcing agent includes amino resin and ammonium sulfate.

8. A high-efficiency air-jet spinning process for regenerated cellulose fiber blended yarn according to any one of claims 1 to 7, characterized in that: The specific steps include: Regenerated cellulose fiber, diacetate fiber, polyethylene glycol and bamboo fiber are mixed, and then flexibly opened and flexibly carded. Then, air-jet spinning is carried out, and double nozzles with large drafting multiples and strong airflow are used for wrapping and twisting to form continuous yarn. The yarn is shaped and wound to obtain the finished yarn.

9. The high-efficiency air-jet spinning process for regenerated cellulose fiber blended yarn according to claim 8, characterized in that: The mass ratio of the polyethylene glycol to the diacetate fiber is (0.1-0.3):1.

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