Production process of environment-friendly marine regenerated chinlon blended yarn

Abstract

The invention discloses a production process of environment-friendly marine regenerated chinlon blended yarn, and belongs to the technical field of textile. The special textile auxiliary agent prepared by the invention comprises the following components in parts by weight: 15 parts of a smoothing agent, 40 parts of an emulsifier, 10 parts of a wetting agent, 15 parts of a bundling agent and 5 parts of an antistatic agent. The special textile auxiliary agent is used for recycling chinlon short fibers, the product quality is effectively improved, and the special textile auxiliary agent has good performance in breaking strength, breaking elongation, light transmittance and bundling performance. The obtained environment-friendly marine regenerated polyamide fiber is blended, and the environment-friendly marine regenerated polyamide blended yarn is obtained through the procedures of fiber pretreatment, disc mixing, steel link cleaning, drawing, roving, spinning and the like, completely meets the requirements of the weaving technology and has important economic value and social benefit.

Description

Technical Field

[0001] The present invention relates to the technical field of textiles, and particularly to a production process of an environment-friendly marine recycled polyamide blended yarn. Background Art

[0002] Human beings' demands for the ocean are infinite, yet the self-healing ability of the marine ecosystem is limited. More than 30 million tons of plastic waste are discarded globally every year, and among them, more than 20 million tons of plastic waste flow into the ocean from land through rivers. Currently, more than 80% of almost all types of plastics found in the ocean are non-degradable resin materials such as polyamide (PA), polypropylene (PP), and polyvinyl chloride (PVC). Abandoned fishing nets are not only a huge source of plastic pollution but also a threat to marine life. Fishing nets on average take 600 - 800 years to decompose naturally, causing a significant impact on the marine ecological environment.

[0003] Polyamide has a wide range of applications in both civil and industrial fabrics. As a textile material, polyamide staple fibers can be spun pure or are also suitable for blending with other fibers. Recycled polyamide fiber products are 100% derived from recycled marine fishing nets. With the increasing environmental protection requirements and awareness, more and more textile factories are starting to use recycled materials. The most common recycling method is physical recycling, that is, mechanical recycling, which means reshaping the polymer without changing its basic properties. However, the recycled products obtained by this method have poor quality and low added value, and other new materials and additives need to be added to meet the performance requirements. Existing additives usually target brand-new materials, and the effect is not significantly improved when they are used for similar recycled materials. Therefore, developing a special additive for recycled materials to improve the performance of the final product is an urgent requirement for the production of environment-friendly marine recycled polyamide blended yarns. Summary of the Invention

[0004] In view of the above-mentioned prior art, the object of the present invention is to provide a production process of an environment-friendly marine recycled polyamide blended yarn. The present invention improves the quality of recycled materials through a special textile additive, and mixes the obtained environment-friendly marine recycled polyamide fibers with fibers such as cotton fibers, viscose, polyester, acrylic, and wool to produce blended yarns with various component ratios. The present invention aims to use this circular and sustainable marine recycled polyamide fiber through specific technical solutions to achieve spinning, making the process from spinning → weaving → clothing → to recycled fibers possible, creating a product closed-loop, and promoting the circular economy.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] In the first aspect of the present invention, there is provided an environment-friendly marine recycled polyamide fiber, and the preparation method is as follows:

[0007] Spray a special textile auxiliary agent on the recycled polyamide staple fiber for pretreatment, then seal and place it, and then obtain environmentally friendly marine recycled polyamide fiber;

[0008] The special textile auxiliary agent includes the following components in parts by weight:

[0009] 15 parts of smoothing agent, 40 parts of emulsifier, 10 parts of wetting agent, 15 parts of bundling agent, 5 parts of antistatic agent;

[0010] The smoothing agent is polyethylene glycol dioleate; the emulsifier is fatty alcohol polyoxyethylene ether; the wetting agent is sodium dioctyl sulfosuccinate; the bundling agent is sulfonated castor oil and fatty alcohol polyoxyethylene ether AEO-9; the antistatic agent is m-pentadecylphenol polyoxyethylene ether.

[0011] Furthermore, before spraying, the mass of the special textile auxiliary agent is 5-15% of the mass of the recycled polyamide staple fiber; after spraying, it is placed for 12-36 hours.

[0012] Furthermore, the mass ratio of sulfonated castor oil to fatty alcohol polyoxyethylene ether AEO-9 is (1-2):(1-2).

[0013] Furthermore, the special textile auxiliary agent is prepared by the following steps:

[0014] Take each component according to the weight ratio, add the smoothing agent and the emulsifier into the reaction vessel, heat and stir evenly; then add the wetting agent, the bundling agent and the antistatic agent, stir evenly and then cool, filter to obtain the special textile auxiliary agent.

[0015] Furthermore, add the smoothing agent and the emulsifier into the reaction vessel, heat to 50-60°C, and stir for 0.5-2 h.

[0016] Furthermore, after adding the wetting agent, the bundling agent and the antistatic agent, stir for 1-3 h, cool to 40-50°C, and filter.

[0017] In the second aspect of the present invention, an environmentally friendly marine recycled polyamide blended yarn is provided. The environmentally friendly marine recycled polyamide blended yarn is made by blending the environmentally friendly marine recycled polyamide fiber and other materials. The other materials include natural fibers or other fibers. The natural fibers include cotton, wool, silk, and hemp. The other fibers include lyocell fiber, modal fiber, viscose fiber, polyester, and acrylic fiber.

[0018] Furthermore, the mass ratio of the environmentally friendly marine recycled polyamide fiber in the environmentally friendly marine recycled polyamide blended yarn is 5%-70%.

[0019] Further, the preparation of the environmentally friendly marine recycled polyamide blended yarn includes the following steps: disk mixing and feeding, blowroom and carding, drawing, roving process, spinning process, and winding and forming.

[0020] Further, for the disk mixing and feeding process, various fibers are mixed in proportion to ensure uniform fiber distribution.

[0021] For the blowroom and carding process, control the carding delivery speed at 70 - 90 meters per minute, and the fixed weight at 20 - 25 grams per 5 meters.

[0022] For the drawing process, adopt a three - stage drawing process to ensure more straight and uniform fiber arrangement.

[0023] For the roving process, initially process into coarser yarns to prepare for the subsequent spinning process.

[0024] For the spinning process, further refine the yarn to improve its strength and uniformity.

[0025] For the winding and forming process: Clean the winding splicer, at least twice per shift, with the total yarn defects not exceeding 400 grains; Splicing strength, on average, exceeds 75% of the original yarn, and for each spindle, it exceeds 70%, with the appearance requirement being less than the diameter of the original yarn; Autoconer electronic clearing parameters, the neps N value is 3 - 3.2, the short thick S value is 1.6 - 2, and the length is 1 - 1.2 cm; The yarn neps on the blackboard, on average, are less than 10 grains, and the knots and impurities on the blackboard of the yarn are less than 20 grains.

[0026] Advantages of the present invention:

[0027] By reasonably configuring a smoothing agent, an emulsifier, a wetting agent, a bundling agent, and an antistatic agent, the present invention obtains a special textile auxiliary for recycling polyamide staple fibers. When the prepared special textile auxiliary is used for the treatment of recycled polyamide staple fibers, multiple index and performance tests show that it has good performance in breaking strength, elongation at break, light transmittance, and bundling property. The special textile auxiliary prepared by the present invention has good water solubility and stable emulsion. After use, the fibers have good cohesion, smoothness, are easy to loosen, have uniform oiling, and good antistatic performance. When it is used for the processing of environmentally friendly marine recycled polyamide fibers, the environmentally friendly marine recycled polyamide blended yarn obtained through processes such as fiber pretreatment, disk mixing, blowroom and carding, drawing, roving, and spinning fully meets the requirements of the weaving process.

[0028] The production process of the environmentally friendly marine recycled polyamide blended yarn of the present invention not only helps to reduce marine pollution but also effectively reduces the dependence on virgin resources. The yarn produced by this method can be used to manufacture various types of fabrics and further processed into clothing, forming a product closed - loop from spinning to weaving, then to clothing production, and finally back to fiber reuse. This is not only beneficial to environmental protection but also promotes the effective recycling of resources and the development of circular economy. Detailed implementation mode

[0029] It should be noted that the following detailed description is illustrative and aims to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application pertains.

[0030] In order to enable those skilled in the art to more clearly understand the technical solution of the present application, the technical solution of the present application will be described in detail below in conjunction with specific embodiments.

[0031] The core of the technical solution of the present invention lies in proposing an innovative production process method, which mainly involves improving the quality of recycled materials through special textile auxiliaries, and mixing and spinning the obtained environmentally friendly marine recycled polyamide fiber with a variety of traditional fibers. This method not only provides a new way of material combination for the textile industry, but also particularly emphasizes the importance of sustainable development. First, the marine recycled polyamide fiber is made by 100% recycling of waste nylon fishing nets in the ocean, and is recycled by a mechanical extraction process rather than a chemical process. This process not only helps to reduce marine pollution, but also reduces the secondary impact of chemical extraction on the environment, and can effectively reduce the dependence on primary resources. Second, this mixing and spinning technology can produce blended yarns with various component ratios, which can create yarns with different performance characteristics to meet the market demand for environmentally friendly products. The final products exhibit excellent performance in terms of hand feeling, durability, breathability, etc. For example, blending marine recycled polyamide with cotton fiber can obtain a soft and wear-resistant fabric; while blending with wool can improve the warmth retention and comfort of the product. In addition, the yarns produced by this method can also be used to manufacture various types of fabrics and further processed into clothing. In this way, a product closed-loop is formed from spinning to weaving, then to clothing production, and finally back to fiber reuse. This closed-loop system is not only beneficial to environmental protection, but also promotes the effective recycling of resources and the development of the circular economy.

[0032] In the embodiments of the present invention, the test materials not specifically described are all conventional test materials in the art and can be obtained through commercial channels. The CAS number of the polyethylene glycol dioleate used in the present invention is 9005-07-6; the CAS number of the fatty alcohol polyoxyethylene ether (ethoxylated-C12-18-alcohol, AEO-9) used is 68213-23-0; the CAS number of the sodium dioctyl sulfosuccinate (fast penetrant T) used is 1639-66-3; the CAS number of the sulfonated castor oil used is 8002-33-3. The fatty alcohol polyoxyethylene ether AEO-9 was purchased from Zibo Zhongcheng Chemical Co., Ltd.; the polyoxyethylene ether of m-pentadecylphenol used was purchased from Taizhou Jiayin Chemical Co., Ltd., and the specification is GF-40. The recycled polyamide short fibers used in the present invention were purchased from Zhejiang Yingruite Recycling Material Technology Co., Ltd. The fibers are made from 100% recycled fishing nets from the ocean processed into pellets by a physical processing method, and the pellets are formed into fibers through wire drawing and shaping.

[0033] Example 1: An environmentally friendly marine recycled polyamide fiber

[0034] 1.1 Preparation of special textile auxiliaries

[0035] The special textile auxiliaries include the following components in parts by weight:

[0036] 15 parts of a smoothing agent, 40 parts of an emulsifier, 10 parts of a wetting agent, 15 parts of a bundling agent, and 5 parts of an antistatic agent.

[0037] The smoothing agent used is polyethylene glycol dioleate; the emulsifier used is fatty alcohol polyoxyethylene ether; the wetting agent used is sodium dioctyl sulfosuccinate; the bundling agent used is sulfonated castor oil and fatty alcohol polyoxyethylene ether AEO-9, and the mass ratio of sulfonated castor oil to fatty alcohol polyoxyethylene ether AEO-9 is 1:1; the antistatic agent used is polyoxyethylene ether of m-pentadecylphenol.

[0038] The preparation method of the special textile auxiliaries is as follows:

[0039] Take the above components in parts by weight, add the smoothing agent and the emulsifier to the reaction kettle, heat to 55°C, stir for 1 h, and stir evenly to carry out an emulsification reaction; then add the wetting agent, the bundling agent and the antistatic agent to the reaction kettle, stir for 2 h, then cool to 45°C, and filter to obtain the special textile auxiliaries.

[0040] 1.2 Environmentally friendly marine recycled polyamide fiber

[0041] The preparation method is as follows:

[0042] (1) Prepare a pretreatment solution: Add 8 kg of special textile auxiliaries to every 100 kg of soft water;

[0043] (2) Spraying pretreatment liquid: Evenly spray 20 kg of pretreatment liquid on every 250 kg of recycled polyamide staple fiber, that is, spray according to 8% of the mass of the recycled polyamide staple fiber;

[0044] (3) Sealed placement: After spraying the recycled polyamide staple fiber, seal it with plastic sheeting and place it for 24 hours to ensure that the fiber fully absorbs the pretreatment liquid, obtaining environmentally friendly marine recycled polyamide fiber.

[0045] Example 2: An environmentally friendly marine recycled polyamide fiber

[0046] 2.1 Preparation of special textile auxiliaries

[0047] The special textile auxiliaries include the following components in parts by weight:

[0048] 15 parts of smoothing agent, 40 parts of emulsifier, 10 parts of wetting agent, 15 parts of bundling agent, and 5 parts of antistatic agent.

[0049] The smoothing agent used is polyethylene glycol dioleate; the emulsifier used is fatty alcohol polyoxyethylene ether; the wetting agent used is sodium dioctyl sulfosuccinate; the bundling agent used is sulfonated castor oil and fatty alcohol polyoxyethylene ether AEO-9, and the mass ratio of sulfonated castor oil to fatty alcohol polyoxyethylene ether AEO-9 is 2:1; the antistatic agent used is m-pentadecylphenol polyoxyethylene ether.

[0050] The preparation method of the special textile auxiliaries is as follows:

[0051] Take the above components in parts by weight in proportion, add the smoothing agent and emulsifier to the reaction kettle, heat to 55 °C, stir for 1 h, and stir evenly to carry out the emulsification reaction; then add the wetting agent, bundling agent and antistatic agent to the reaction kettle, stir for 2 h, then cool to 45 °C, and filter to obtain the special textile auxiliaries.

[0052] 2.2 Environmentally friendly marine recycled polyamide fiber

[0053] The preparation method is as follows:

[0054] (1) Prepare pretreatment liquid: Add 8 kg of special textile auxiliaries to every 100 kg of soft water;

[0055] (2) Spraying pretreatment liquid: Evenly spray 20 kg of pretreatment liquid on every 250 kg of recycled polyamide staple fiber, that is, spray according to 8% of the mass of the recycled polyamide staple fiber;

[0056] (3) Sealed placement: After spraying the recycled polyamide staple fiber, seal it with plastic sheeting and place it for 24 hours to ensure that the fiber fully absorbs the pretreatment liquid, obtaining environmentally friendly marine recycled polyamide fiber.

[0057] Example 3: An environmentally friendly marine recycled polyamide fiber

[0058] 3.1 Preparation of Special Textile Auxiliaries

[0059] The special textile auxiliaries include the following components in parts by weight:

[0060] 15 parts of smoothing agent, 40 parts of emulsifier, 10 parts of wetting agent, 15 parts of bundling agent, and 5 parts of antistatic agent.

[0061] The smoothing agent used is polyethylene glycol dioleate; the emulsifier used is fatty alcohol polyoxyethylene ether; the wetting agent used is sodium dioctyl sulfosuccinate; the bundling agent used is sulfonated castor oil and fatty alcohol polyoxyethylene ether AEO-9, and the mass ratio of sulfonated castor oil to fatty alcohol polyoxyethylene ether AEO-9 is 1:2; the antistatic agent used is m-pentadecylphenol polyoxyethylene ether.

[0062] The preparation method of the special textile auxiliaries is as follows:

[0063] Take each component in the above parts by weight in proportion, add the smoothing agent and emulsifier into the reaction kettle, heat to 55°C, stir for 1 h, and stir evenly to carry out the emulsification reaction; then add the wetting agent, bundling agent and antistatic agent into the reaction kettle, stir for 2 h, then cool to 45°C, and filter to obtain the special textile auxiliaries.

[0064] 3.2 Environmentally Friendly Marine Regenerated Nylon Fiber

[0065] The preparation method is as follows:

[0066] (1) Prepare the pretreatment solution: Add 8 kg of special textile auxiliaries to every 100 kg of soft water;

[0067] (2) Spray the pretreatment solution: Evenly spray 20 kg of the pretreatment solution on every 250 kg of recycled nylon staple fibers, that is, spray according to 8% of the mass of the recycled nylon staple fibers;

[0068] (3) Seal and place: After spraying the recycled nylon staple fibers, seal them with plastic sheeting and place them for 24 hours to ensure that the fibers fully absorb the pretreatment solution to obtain the environmentally friendly marine regenerated nylon fiber.

[0069] Comparative Example 1

[0070] The difference between this Comparative Example 1 and Example 1 is that the bundling agent is not added to the special textile auxiliaries, specifically as follows:

[0071] The special textile auxiliaries include the following components in parts by weight:

[0072] 15 parts of smoothing agent, 40 parts of emulsifier, 10 parts of wetting agent, and 5 parts of antistatic agent.

[0073] Preparation method:

[0074] Take the above components in the given weight parts, add the smoothing agent and emulsifier into the reaction kettle, heat to 55 °C, stir for 1 h, and carry out an emulsification reaction after stirring evenly; then add the wetting agent and antistatic agent into the reaction kettle, stir for 2 h, cool to 45 °C, and filter to obtain a special textile auxiliary agent.

[0075] The preparation method of the environmentally friendly marine recycled polyamide fiber is the same as that in Example 1.

[0076] Comparative Example 2

[0077] The difference between this Comparative Example 2 and Example 1 is that the bundling agent used in the special textile auxiliary agent is sulfonated castor oil, specifically as follows:

[0078] The special textile auxiliary agent includes the following components in weight parts:

[0079] 15 parts of smoothing agent, 40 parts of emulsifier, 10 parts of wetting agent, 15 parts of bundling agent, 5 parts of antistatic agent.

[0080] The smoothing agent used is polyethylene glycol dioleate; the emulsifier used is fatty alcohol polyoxyethylene ether; the wetting agent used is sodium dioctyl sulfosuccinate; the antistatic agent used is m-pentadecylphenol polyoxyethylene ether.

[0081] The preparation method of the special textile auxiliary agent and the environmentally friendly marine recycled polyamide fiber in this Comparative Example 2 is the same as that in Example 1.

[0082] Comparative Example 3

[0083] The difference between this Comparative Example 3 and Example 1 is that the bundling agent used in the special textile auxiliary agent is fatty alcohol polyoxyethylene ether AEO-9, specifically as follows:

[0084] The special textile auxiliary agent includes the following components in weight parts:

[0085] 15 parts of smoothing agent, 40 parts of emulsifier, 10 parts of wetting agent, 15 parts of bundling agent, 5 parts of antistatic agent.

[0086] The smoothing agent used is polyethylene glycol dioleate; the emulsifier used is fatty alcohol polyoxyethylene ether; the wetting agent used is sodium dioctyl sulfosuccinate; the antistatic agent used is m-pentadecylphenol polyoxyethylene ether.

[0087] The preparation method of the special textile auxiliary agent and the environmentally friendly marine recycled polyamide fiber in this Comparative Example 3 is the same as that in Example 1.

[0088] Test Example

[0089] Take the special textile auxiliary agents and environmentally friendly marine recycled polyamide fibers prepared according to the methods of Example 1 and Comparative Examples 1-3 for testing.

[0090] The indicators and performance test methods are as follows:

[0091] (1) Tensile strength and elongation at break: The environmental protection marine recycled polyamide fiber is determined in accordance with GB / T 14337-2022 "Test Method for Tensile Properties of Chemical Fiber Staple Fibers".

[0092] The target for the breaking strength and elongation at break of polyamide staple fibers is high strength and low elongation. Only when the fiber has high breaking strength and low elongation at break can the yarn strength be high.

[0093] (2) Smoke emission test: Use a light transmittance meter to test the smoke emission of the special textile auxiliary at a high temperature of 150 °C; specifically, measure 50 μL of the sample in a crucible. First, place the crucible in an oven at 105 °C for 3 h to remove moisture, then place the crucible on a hot plate at 150 °C, cover it with an airtight cover, and use a light transmittance meter to read the light transmittance after it has been placed for 10 min.

[0094] The larger the light transmittance value, the smaller the smoke emission of the special textile auxiliary.

[0095] (3) Bundling property: Take out the oil-free recycled polyamide staple fibers after soaking them in an aqueous solution with a mass fraction of 10% of the special textile auxiliary for 5 min, hang them for 24 h, and then observe the degree of dispersion of the filament cross-section when cut under a tension of 20 cN; if the percentage increase in cross-sectional area is less than 10%, it is considered qualified.

[0096] The test results of the indicators of the special textile auxiliary and the environmental protection marine recycled polyamide fiber of the present invention are shown in Table 1

[0097] Table 1 Test Results

[0098] Example 1 Comparative Example 1 Comparative Example 2 Comparative Example 3 Breaking strength cN / dtex 5.9 4.6 4.9 5.2 Elongation at break (%) 17.7 37.5 29.8 28.7 Light transmittance (%) 92.8 88.7 91.6 92.1 Bundling property Qualified Unqualified Qualified Qualified

[0099] Compared with Comparative Examples 1-3, the special textile auxiliary prepared in Example 1 of the present invention has better performance in terms of tensile strength, elongation at break, light transmittance, and bundling property.

[0100] Example 4: An environmentally friendly marine recycled polyamide blended yarn

[0101] 4.1 Raw material selection

[0102] The mass ratio of the environmental protection marine recycled polyamide fiber to the cotton fiber is 1:1.

[0103] 4.2 Process flow

[0104] Mix the prepared environmental protection marine recycled polyamide fiber with the cotton fiber. The specific process flow includes the following key steps:

[0105] Pan mixing and feeding: Mix various fibers in proportion to ensure uniform fiber distribution;

[0106] Blending and carding: Clean and card the fibers to make them more uniform for subsequent processing;

[0107] Drawing in three passages: Further optimize the fiber arrangement through multiple processes to improve fiber consistency;

[0108] Roving: Preliminary processing into relatively thick yarns to prepare for subsequent spinning processes;

[0109] Spinning: Further refine the yarn to improve its strength and uniformity, ensuring the quality of the final product;

[0110] Winding and forming: Wind the yarn into a shape suitable for subsequent use, facilitating storage and transportation.

[0111] 4.3 Production parameter settings

[0112] In order to spin this environmentally friendly marine recycled polyamide fiber smoothly and ensure the quality of the yarn, the specific production parameter settings are as follows:

[0113] For the blending and carding process, control the carding delivery speed at 80 m / min, and the fixed weight at 22 g / 5 m.

[0114] For the drawing process, adopt the three-drawing process to ensure that the fiber arrangement is straighter and more uniform.

[0115] For the winding and forming process: Clean the winding splicer, clean at least twice per shift, with the total yarn defects not exceeding 400 grains; Splicing strength, with an average exceeding 75% of the original yarn and exceeding 70% for each spindle, and the appearance requirement being less than the diameter of the original yarn; Self-winding electronic clearing parameters, with the neps N value being 3.2, the short and thick S value being 1.80, and the length being 1.1 cm; The neps on the blackboard of the formed yarn, with an average of less than 10 grains, and the knots and impurities on the blackboard of the formed yarn being less than 20 grains.

[0116] 4.4 Quality inspection

[0117] Conduct quality tests on the produced 10s yarn. The test items include: breaking strength and breaking tenacity, neps on the blackboard and knots and impurities on the blackboard, and evenness CV%.

[0118] The test methods are as follows: For the breaking strength and breaking tenacity items, implement the standard "GB / T 3916-2013 Textiles - Yarns in packages - Determination of breaking force and elongation at break of single yarns (CRE method)"; For the neps on the blackboard and knots and impurities on the blackboard items, implement the standard "GB / T 9996.2-2008 Cotton and chemical fiber pure spun and blended yarns - Method for inspecting appearance quality on blackboard - Part 2: Separate evaluation method"; For the evenness CV% item, implement the method standard "GB / T 3292.2-2009 Textiles - Test method for yarn evenness - Part 2: Optoelectronic method". The test results are shown in Table 2 below.

[0119] Table 2 Quality Inspection Results

[0120]

[0121] The quality of the finally produced 10s yarn meets the expected standards. The neps and impurities on the yarn blackboard are within the specified range, and the splicing strength and appearance both meet the design requirements.

[0122] The special textile auxiliary agent prepared by the present invention has good water solubility and stable emulsion. After use, the fibers have good cohesion, smoothness, are easy to open, are evenly oiled, and have good antistatic performance. When it is used in the processing of environmentally friendly marine recycled polyamide fibers, the environmentally friendly marine recycled polyamide blended yarns obtained through processes such as fiber pretreatment, disk mixing, blowroom and carding unit, drawing, roving, and spinning fully meet the requirements of the weaving process. The method of the present invention not only embodies the concept of environmental friendliness, but also provides new ideas and technical support for the sustainable development of the textile industry. In this way, not only can the environmental quality be improved, but also the competitiveness and social responsibility of enterprises can be enhanced, making contributions to the future development of the green economy.

[0123] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. An environmentally friendly marine regenerated nylon fiber, characterized in that: The preparation method is as follows: The recycled nylon staple fibers are sprayed with special textile auxiliaries for pretreatment, sealed and placed, and then environmentally friendly marine recycled nylon fibers are obtained; The special textile auxiliary agent comprises the following components in parts by weight: 15 parts of smoothing agent, 40 parts of emulsifier, 10 parts of wetting agent, 15 parts of sizing agent, 5 parts of antistatic agent; The lubricant is polyethylene glycol dioleate; the emulsifier is fatty alcohol polyoxyethylene ether; the wetting agent is dioctyl sodium sulfosuccinate; the sizing agent is sulfonated castor oil and fatty alcohol polyoxyethylene ether AEO-9; and the antistatic agent is pentadecylphenol polyoxyethylene ether.

2. The environmentally friendly marine regenerated nylon fiber according to claim 1, characterized in that: Before spraying, the mass of the special textile auxiliary agent is 5-15% of the mass of the recycled nylon staple fiber; after spraying, it is left for 12-36 hours.

3. The environmentally friendly marine regenerated nylon fiber according to claim 1, characterized in that: The mass ratio of sulfonated castor oil to fatty alcohol polyoxyethylene ether AEO-9 is (1-2): (1-2).

4. The environmentally friendly marine regenerated nylon fiber according to claim 2, characterized in that: The special textile auxiliary agent is prepared by the following steps: Take each component according to the weight ratio, add the smoothing agent and emulsifier into the reaction container, heat and stir evenly; then add the wetting agent, the sizing agent and the antistatic agent, stir evenly, cool, filter, and obtain the special textile auxiliary agent.

5. The environmentally friendly marine regenerated nylon fiber according to claim 4, characterized in that: Add the smoothing agent and emulsifier into the reaction vessel, heat to 50-60°C, and stir for 0.5-2h.

6. The environmentally friendly marine regenerated nylon fiber according to claim 4, characterized in that: After adding the wetting agent, sizing agent and antistatic agent, stir for 1-3 hours, cool to 40-50°C and filter.

7. An environmentally friendly marine recycled nylon blended yarn, characterized in that: The environmentally friendly marine regenerated nylon blended yarn is formed by blending the environmentally friendly marine regenerated nylon fiber described in any one of claims 1 to 6 with other materials. The other materials used include natural fibers or other fibers. The natural fibers include cotton, wool, silk, and linen. The other fibers include lyocell fibers, modal fibers, viscose fibers, polyester, and acrylic fibers.

8. The environmentally friendly marine regenerated nylon blended yarn according to claim 7, characterized in that: The mass ratio of the environmentally friendly marine regenerated nylon fiber in the environmentally friendly marine regenerated nylon blended yarn is 5%-70%.

9. The environmentally friendly marine regenerated nylon blended yarn according to claim 7, characterized in that: The preparation of environmentally friendly marine recycled nylon blended yarn includes the following steps: mixing and feeding, steel cleaning, drawing, roving process, spun yarn process, and winding and forming.

10. The environmentally friendly marine regenerated nylon blended yarn according to claim 9, characterized in that: For the pan-mixing process, various fibers are mixed in proportion to ensure uniform fiber distribution; For the steel cleaning process, the carding speed is controlled at 70-90 m / min and the basis weight is 20-25 g / 5 m; For the drawing process, a three-step drawing process is used to ensure that the fiber arrangement is straighter and more uniform; For the roving process, it is initially processed into thicker yarn to prepare for the subsequent spun yarn process; For the spinning process, the yarn is further refined to improve its strength and uniformity; For the winding process: the winding splicer must be cleaned at least twice per shift, and the total yarn defects must not exceed 400 grains; the splicing strength must exceed 75% of the original yarn on average, and more than 70% for a single spindle, and the appearance must be smaller than the original yarn diameter; The parameters of self-winding electro-cleaning are as follows: the N value of cotton nep is 3-3.2, the S value of short and thick is 1.6-2, and the length is 1-1.2 cm; the average number of blackboard cotton nep in the yarn is less than 10, and the number of miscellaneous blackboard knots in the yarn is less than 20.

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