Preparation Method of Environmentally Friendly Recycled Colored Fiber Blended Yarn

Abstract

The preparation method of the environmentally friendly regenerated colored fiber blended yarn disclosed by the present invention comprises the following specific steps: S1: collecting waste materials; S2: pre-treatment; S3: melt spinning; S4: fiber filament treatment; S5: cotton blending; in the said S2, the pre-treatment comprises the following specific steps: S21: sorting; S22: cleaning; S23: decolorization; in the said S23, the decolorization comprises the following specific steps: S231: atomization reaction: hanging the treated waste materials in a closed space, and spraying the decolorizing agent on the surface of the waste materials in an atomized manner, wherein the temperature of the closed space is controlled at 90°C - 110°C; S232: flushing with a cleaning agent; S233: soaking and cleaning with methyl silicone oil; S234: degreasing; S235: drying; the preparation method of the environmentally friendly regenerated colored fiber blended yarn disclosed by the present invention can effectively avoid fiber embrittlement, improve the quality of raw materials, and also ensure the number of times of recycling and reuse.

Description

Technical Field

[0001] The present invention relates to the technical field of regenerated fiber blended yarns, and particularly to a preparation method of environmentally friendly regenerated colored fiber blended yarns. Background Art

[0002] Developing recycled chemical fibers is an important way for the chemical fiber industry and even the textile industry in China to achieve sustainable development. Recyclable blended yarns are spun using recycled waste textiles as raw materials and adding other auxiliaries. Thus, recyclable blended yarns can not only alleviate the current shortage of resources in the textile industry but also reduce the pollution caused by waste textiles to the environment, and are now attracting more and more attention.

[0003] Generally, before preparing ordinary environmentally friendly regenerated colored fibers, a unified decolorization treatment is required to avoid affecting the color of the fiber filaments due to pigment mixing during the subsequent melt spinning process. The common decolorization treatment is generally to directly soak polyester fibers in a decolorizing solution for decolorization. During the soaking process, a large amount of decolorizing solution is likely to erode the fibers themselves, thereby affecting the toughness of the subsequent yarns made from the polyester fibers. After the fibers are recycled multiple times and then repeatedly decolorized and reused, their usability will gradually decrease. Summary of the Invention

[0004] The present invention discloses a preparation method of environmentally friendly regenerated colored fiber blended yarns, aiming to solve the technical problem that the usability of fibers will gradually decrease after being recycled multiple times and then repeatedly decolorized and reused.

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

[0006] A preparation method of environmentally friendly regenerated colored fiber blended yarns includes the following specific steps:

[0007] S1: Collecting waste materials: Collecting waste polyester fiber materials;

[0008] S2: Pretreatment: Preliminarily treating the collected waste materials to make them meet the requirements for spinning;

[0009] S3: Melt spinning: Uniformly melting the treated polyester fiber materials and making the required polyester fiber filaments;

[0010] S4: Fiber filament treatment: Further treating the made fiber filaments, including coating, carding into rolls, shredding, cleaning, and drying;

[0011] S5: Blending cotton: Blending the fiber filaments with cotton and then spinning;

[0012] In the said S2, the pretreatment includes the following specific steps:

[0013] S21: Sorting: Sort the collected waste materials, sort out the waste materials with polyester fiber as the raw material, and further distinguish them according to colored and colorless;

[0014] S22: Cleaning: Clean the appearance of the waste materials, remove the surface stains and then dry them;

[0015] S23: Decolorization: Perform decolorization treatment on the colored waste materials after cleaning;

[0016] In the said S23, the decolorization includes the following specific steps:

[0017] S231: Atomization reaction: Hang the treated waste materials in a closed space, and spray the decolorizing agent on the surface of the waste materials in an atomized manner, where the temperature of the closed space is controlled at 90°C - 110°C;

[0018] S232: Flushing with cleaning agent: After reacting for 15 minutes, directly pour the fiber cleaning agent from above, and use the cleaning agent to flush the waste materials after the decolorization reaction;

[0019] S233: Soaking and cleaning with methyl silicone oil: Take out the waste materials and soak them in the prepared methyl silicone oil and shake them for cleaning;

[0020] S234: Degreasing: Clean the methyl silicone oil on the waste materials with silicone oil cleaning solution in an environment of 45°C;

[0021] S235: Drying.

[0022] By using the atomization reaction to replace the immersion decolorization used in general decolorization, the decolorizing agent is evenly sprayed on the surface of the polyester waste materials in an atomized spraying manner. While reducing the usage amount of the decolorizing agent, it can also ensure the stable contact reaction between the decolorizing agent and the waste materials. Since the usage amount of the decolorizing agent is small, after the color detaches, it cannot fall off smoothly. Then, through the flushing with the fiber cleaning agent, the color and the decolorizing agent are detached and then soaked in the methyl silicone oil and shaken for cleaning. Under the lubricating effect of the methyl silicone oil, the attachments that have not been flushed off can fall into the methyl silicone oil. Synchronously, the decolorized fibers are also repaired and have a softening effect synchronously. Then, through degreasing and drying, the fibers are kept fresh. In this step, fiber embrittlement can be effectively avoided, and while improving the quality of the raw materials, the number of times of recycling can also be ensured.

[0023] In a preferred solution, the said S4, the fiber filament treatment includes the following specific steps:

[0024] S41: Coating application: Evenly apply the coating on the surface of the formed fiber filaments;

[0025] S42: Combing and winding into a roll: Comb the fiber filaments after applying the coating and wind them into a roll for collection;

[0026] S43: Fragmentation: Fragment multiple rolls of fiber filaments synchronously and collect them uniformly;

[0027] S44: Cleaning: Thoroughly clean the fragmented fiber filaments with silicone oil cleaning agent;

[0028] S45: Drying: Dry the cleaned fiber filaments for storage and standby;

[0029] For the said S5, cotton blending includes the following specific steps:

[0030] S51: Preparation of cotton blending box: Prepare the cotton blending box and fill it with cotton filaments;

[0031] S52: Injecting fibers: Inject the fragmented fiber filaments into the cotton blending box;

[0032] S53: Heating and spraying: Spray the cotton filaments and fiber filaments in the cotton blending box through the spraying mechanism, so that the two are evenly mixed in the cotton blending box and heated to the set temperature of the cotton blending box;

[0033] S54: Stranding: Make the mixed cotton filaments and fiber filaments into single yarns, and combine multiple single yarns according to the production process, and add a certain twist to process them into ply yarns;

[0034] For the said S51, the cotton blending box in the preparation of the cotton blending box is composed of a relatively sealed space with a spraying mechanism arranged below it, and the cotton blending box can be heated to 80 - 90 °C;

[0035] For the said S52, after injecting the fibers, the ratio of fiber filaments to cotton filaments is 7 - 8:3 - 2.

[0036] During the cotton blending process, by spraying, the cotton filaments and fiber filaments are mixed in the cotton blending box, and then made into single yarns to form fiber blended yarns. Compared with the method of directly adding a certain twist to mix the fiber filaments and cotton filaments, the fibers and cotton in the blended yarn made by this method are more evenly mixed, further ensuring the quality of the blended yarn.

[0037] In a preferred embodiment, for the said S41, the coating application includes the following specific steps:

[0038] S411: Adhesive proportioning: Prepare the adhesive for coating on the fiber surface;

[0039] S412: Adhesive coating: Uniformly coat the adhesive on the fiber surface;

[0040] S413: Oil agent proportioning: Prepare the oil agent for coating on the surface of the adhesive;

[0041] S414: Oil agent coating: Uniformly coat the oil agent on the surface of the adhesive;

[0042] In S41, in the binder formulation, the binder is composed of a styrene-butadiene-styrene block copolymer, a tackifying resin, and a softening agent, and the ratio of the styrene-butadiene-styrene block copolymer, the tackifying resin, and the softening agent is 100:10 - 15:25 - 30;

[0043] In S413, in the oil agent formulation, the oil agent is composed of methyl silicone oil, a plasticizer, and a wetting agent, and the ratio of the methyl silicone oil, the plasticizer, and the wetting agent is 100:10:5 - 10.

[0044] By applying a binder on the fiber surface and coating an oil agent on the surface of the binder, the oil agent on the surface can play a lubricating role, facilitating subsequent combing and shredding processes, avoiding multi-strand fiber knotting, and at the same time protecting the binder to prevent the binder from falling off during combing or other processing. When washed, part of the binder still adheres to the fiber surface. When blending cotton in the blending box, the temperature is raised to activate the viscosity of the binder, so that it can smoothly bond with the cotton filaments, ensuring the smoothness of subsequent strand formation and the tightness of the bond between the two.

[0045] As can be seen from the above, the preparation method of the environmentally friendly recycled colored fiber blended yarn includes the following specific steps: S1: Collect waste materials: Collect waste polyester fiber materials; S2: Pretreatment: Conduct preliminary treatment on the collected waste materials to make them meet the requirements for spinning; S3: Melt spinning: Uniformly melt the treated polyester fiber materials and make them into the required polyester fiber filaments; S4: Fiber filament treatment: Further process the made fiber filaments, including applying agents, combing into rolls, shredding, cleaning, and drying; S5: Blending cotton: Blend the fiber filaments with cotton and then spin; In S2, the pretreatment includes the following specific steps: S21: Sorting: Sort the collected waste materials, sort out the waste materials with polyester fiber as the raw material, and further distinguish them according to colored and colorless; S22: Cleaning: Clean the appearance of the waste materials, remove surface stains and then dry; S23: Decolorization: Conduct decolorization treatment on the washed colored waste materials; In S23, the decolorization includes the following specific steps: S231: Atomization reaction: Hang the treated waste materials in a closed space, and spray the decolorizing agent on the surface of the waste materials in an atomized manner, where the temperature of the closed space is controlled at 90°C - 110°C; S232: Flushing with cleaning agent: After reacting for 15 minutes, directly pour the fiber cleaning agent from above, and use the cleaning agent to flush the waste materials after the decolorization reaction; S233: Soaking and cleaning in methyl silicone oil: Take out the waste materials and soak them in the prepared methyl silicone oil and shake to clean; S234: Removing oil: Clean the methyl silicone oil on the waste materials with a silicone oil cleaning solution at 45°C; S235: Drying. The preparation method of the environmentally friendly recycled colored fiber blended yarn provided by the present invention has the technical effects of effectively avoiding fiber embrittlement, improving the quality of raw materials, and ensuring the number of recycling times. Description of the Drawings

[0046] Figure 1 This is the specific flowchart of the preparation method of the environmentally friendly regenerated colored fiber blended yarn proposed by the present invention.

[0047] Figure 2 This is the pretreatment flowchart of the preparation method of the environmentally friendly regenerated colored fiber blended yarn proposed by the present invention.

[0048] Figure 3 This is the decolorization flowchart of the preparation method of the environmentally friendly regenerated colored fiber blended yarn proposed by the present invention.

[0049] Figure 4 This is the fiber filament treatment flowchart of the preparation method of the environmentally friendly regenerated colored fiber blended yarn proposed by the present invention.

[0050] Figure 5 This is the coating application flowchart of the preparation method of the environmentally friendly regenerated colored fiber blended yarn proposed by the present invention.

[0051] Figure 6 This is the cotton blending flowchart of the preparation method of the environmentally friendly regenerated colored fiber blended yarn proposed by the present invention. Detailed Embodiments

[0052] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with 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.

[0053] The preparation method of the environmentally friendly regenerated colored fiber blended yarn disclosed by the present invention is mainly applied to the scenario of preparing regenerated fiber blended yarns.

[0054] Refer to Figures 1-3 , the preparation method of the environmentally friendly regenerated colored fiber blended yarn includes the following specific steps:

[0055] S1: Collect waste materials: Collect waste polyester fiber materials;

[0056] S2: Pretreatment: Perform preliminary treatment on the collected waste materials to make them meet the spinning requirements;

[0057] S3: Melt spinning: Uniformly melt the treated polyester fiber materials and make the required polyester fiber filaments;

[0058] S4: Fiber filament treatment: Perform further treatment on the made fiber filaments, including coating application, carding into rolls, fragmentation, cleaning, and drying;

[0059] S5: Cotton blending: Blend the fiber filaments and then spin them;

[0060] S2, the pretreatment includes the following specific steps:

[0061] S21: Sorting: Sort the collected waste materials, sort out the waste materials with polyester fiber as the raw material, and further distinguish them according to color (colored and colorless);

[0062] S22: Cleaning: Clean the outer surface of the waste materials, remove the surface stains and then dry them;

[0063] S23: Decolorization: Conduct decolorization treatment on the colored waste materials after cleaning;

[0064] S23. The decolorization includes the following specific steps:

[0065] S231: Atomization reaction: Hang the treated waste materials in a closed space, and spray the decolorizing agent on the surface of the waste materials in an atomized manner, where the temperature of the closed space is controlled at 90°C - 110°C;

[0066] S232: Flushing with cleaning agent: After reacting for 15 minutes, directly pour the fiber cleaning agent from above, and use the cleaning agent to flush the waste materials after the decolorization reaction;

[0067] S233: Immersion cleaning in methyl silicone oil: Take out the waste materials and immerse them in the prepared methyl silicone oil and shake them for cleaning;

[0068] S234: Degreasing: Use silicone oil cleaning solution to clean the methyl silicone oil on the waste materials in an environment of 45°C;

[0069] S235: Drying. The decolorizing agent is evenly sprayed on the surface of the polyester waste materials in an atomized spraying manner. While reducing the usage amount of the decolorizing agent, it can also ensure stable contact reaction between the decolorizing agent and the waste materials. Since the usage amount of the decolorizing agent is small, after the color detaches, it cannot fall off smoothly. Then, through flushing with the fiber cleaning agent, the color and the decolorizing agent are detached and then immersed in the methyl silicone oil for shaking cleaning. Under the lubricating action of the methyl silicone oil, the attachments that have not fallen off after flushing can fall into the methyl silicone oil. Synchronously, the decolorized fibers are also repaired and have a softening effect synchronously. Then, through degreasing and drying, the fibers are kept fresh. In this step, fiber embrittlement can be effectively avoided, the quality of the raw materials is improved, and the number of times of recycling can also be guaranteed.

[0070] Refer to Figure 4 , in a preferred embodiment, S4, the fiber filament treatment includes the following specific steps:

[0071] S41: Coating application: Uniformly apply the coating on the surface of the formed fiber filaments;

[0072] S42: Combing and winding: Comb the fiber filaments after coating application and wind them into rolls for collection;

[0073] S43: Fragmentation: Fragment multiple rolls of fiber filaments synchronously and collect them uniformly;

[0074] S44: Cleaning: Thoroughly clean the fragmented fiber filaments with silicone oil cleaning agent;

[0075] S45: Drying: Dry the cleaned fiber filaments and store them for standby.

[0076] Refer to Figure 6 , in a preferred embodiment, S5, cotton blending includes the following specific steps:

[0077] S51: Preparation of cotton blending box: Prepare the cotton blending box and fill it with cotton filaments;

[0078] S52: Injection of fibers: Inject the fragmented fiber filaments into the cotton blending box;

[0079] S53: Heating and spraying: Spray the cotton filaments and fiber filaments in the cotton blending box through the spraying mechanism to make them evenly mixed in the cotton blending box and heat them to the set temperature of the cotton blending box;

[0080] S54: Stranding: Make the mixed cotton filaments and fiber filaments into single yarns, and combine multiple single yarns according to the production process, and add a certain twist to process them into ply yarns.

[0081] Refer to Figure 6 , in a preferred embodiment, S51, the cotton blending box in the preparation of the cotton blending box is composed of a relatively sealed space with a spraying mechanism arranged below it, and the cotton blending box can be heated to 80 - 90 °C.

[0082] Refer to Figure 6 , in a preferred embodiment, S52, after injecting the fibers, the ratio of fiber filaments to cotton filaments is 7 - 8:3 - 2. During the cotton blending process, the cotton filaments and fiber filaments are mixed in the cotton blending box by spraying. After mixing, they are made into single yarns to form fiber blended yarns. Compared with the method of directly adding a certain twist to mix the fiber filaments and cotton filaments, the fiber and cotton in the blended yarn made by this method are more evenly mixed, further ensuring the quality of the blended yarn.

[0083] Refer to Figure 5 , in a preferred embodiment, S41, coating agent application includes the following specific steps:

[0084] S411: Adhesive proportioning: Prepare the adhesive for coating on the fiber surface;

[0085] S412: Adhesive coating: Uniformly coat the adhesive on the fiber surface;

[0086] S413: Oil agent proportioning: Prepare the oil agent for coating on the surface of the adhesive;

[0087] S414: Oil application: Uniformly apply the oil agent on the surface of the adhesive.

[0088] Refer to Figure 5 , in a preferred embodiment, in S41, for the adhesive formulation, the adhesive is composed of styrene-butadiene-styrene block copolymer, tackifying resin, and softening agent, and the ratio of styrene-butadiene-styrene block copolymer, tackifying resin, and softening agent is 100:10 - 15:25 - 30.

[0089] Refer to Figure 5 , in a preferred embodiment, in S413, for the oil agent formulation, the oil agent is composed of methyl silicone oil, plasticizer, and wetting agent, and the ratio of methyl silicone oil, plasticizer, and wetting agent is 100:10:5 - 10. By applying the adhesive on the fiber surface and coating the oil agent on the surface of the adhesive, the oil agent on the surface can play a lubricating role, facilitating the subsequent combing and shredding processes, preventing multiple strands of fibers from knotting, and at the same time protecting the adhesive to avoid the adhesive from falling off during combing or other treatment processes. When washed, part of the adhesive still adheres to the fiber surface. When blending cotton in the blending box, the temperature is raised to activate the viscosity of the adhesive, so that it can be smoothly bonded with the cotton filaments, ensuring the smoothness of the subsequent strand formation and the tightness of the bonding between the two.

[0090] Working principle: During the production process, the decolorizing agent is evenly sprayed on the surface of polyester waste in the form of atomized injection through atomization reaction. While reducing the usage amount of the decolorizing agent, it can also ensure stable contact reaction between the decolorizing agent and the waste. Since the usage amount of the decolorizing agent is small, after the color is removed, it cannot fall off smoothly. Then, it is washed with a fiber cleaning agent so that the color and the decolorizing agent are separated and then soaked in methyl silicone oil for shaking and cleaning. Under the lubrication of methyl silicone oil, the attachments that have not been washed off can fall into the methyl silicone oil. Synchronously, the decolorized fibers are repaired and have a softening effect at the same time. Then, through degreasing and drying, the fibers are kept fresh. At this step, fiber embrittlement can be effectively avoided, the quality of raw materials can be improved, and the number of times of recycling can be guaranteed. In addition, during the cotton blending process, the cotton filaments and fiber filaments are mixed in the cotton blending box by spraying. After mixing, they are made into single yarns to form fiber blended yarns. Compared with the method of directly adding a certain twist to mix the fiber filaments and cotton filaments, the fibers and cotton in the blended yarns made by this method are more evenly mixed, further guaranteeing the quality of the blended yarns. Among them, an adhesive is applied to the surface of the fibers, and an oil agent is coated on the surface of the adhesive. The oil agent on the surface can play a lubricating role, facilitating subsequent carding and fragmentation processes, preventing multiple strands of fibers from knotting, and at the same time protecting the adhesive to avoid the adhesive falling off during carding or other processing. After cleaning, part of the adhesive still adheres to the surface of the fibers. When blending cotton in the cotton blending box, the temperature is raised to activate the viscosity of the adhesive, so that it can be smoothly bonded to the cotton filaments, ensuring the smoothness of subsequent strands and the tightness of the bond between the two.

[0091] The above is only the preferred specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. Preparation method of environmentally friendly recycled colored fiber blended yarn, characterized in that, It includes the following specific steps: S1: Scrap collection: Collect waste polyester fiber materials; S2: Pretreatment: Preliminarily process the collected waste materials to make them meet the requirements of spinning; S3: Melt spinning: Uniformly melt the processed polyester fiber materials and make them into the required polyester fiber filaments; S4: Fiber filament treatment: Further process the made fiber filaments, including applying coating, carding into rolls, shredding, cleaning and drying; S5: Cotton blending: Blend the fiber filaments with cotton and then spin; In step S2, the pretreatment includes the following specific steps: S21: Sorting: Sort the collected waste materials, sort out the waste materials with polyester fiber as the raw material, and further distinguish them according to colored and colorless; S22: Cleaning: Clean the surface of the waste materials, remove the surface stains and then dry; S23: Decolorization: Perform decolorization treatment on the cleaned colored waste materials; In step S23, the decolorization includes the following specific steps: S231: Atomization reaction: Hang the processed waste materials in a closed space, and spray the decolorizing agent on the surface of the waste materials in an atomized manner, where the temperature of the closed space is controlled at 90°C - 110°C; S232: Flushing with cleaning agent: After reacting for 15 minutes, directly pour the fiber cleaning agent from above, and use the cleaning agent to flush the waste materials after the decolorization reaction; S233: Immersion cleaning in methyl silicone oil: Take out the waste materials and immerse them in the prepared methyl silicone oil and shake them for cleaning; S234: Oil removal: Clean the methyl silicone oil on the waste materials with silicone oil cleaning solution at 45°C; S235: Drying.

2. The preparation method of the environment-friendly recycled colored fiber blended yarn according to claim 1, wherein, In step S4, the fiber filament treatment includes the following specific steps: S41: Coating application: Uniformly apply the coating on the surface of the made fiber filaments; S42: Carding into rolls: Card the fiber filaments after applying the coating, and wind them into rolls for collection; S43: Shredding: Synchronously shred multiple rolls of fiber filaments and collect them uniformly; S44: Cleaning: Thoroughly clean the shredded fiber filaments with silicone oil cleaning agent; S45： Drying: Dry the cleaned fiber filaments and store them for standby.

3. The preparation method of the environment-friendly recycled colored fiber blended yarn according to claim 2, characterized in that, In step S5, the cotton blending includes the following specific steps: S51: Preparation of cotton blending box: Prepare the cotton blending box and fill it with cotton filaments; S52: Injection of fibers: Inject the shredded fiber filaments into the cotton blending box; S53: Heating and spraying: Spray the cotton filaments and fiber filaments in the cotton blending box through the spraying mechanism, so that the two are evenly mixed in the cotton blending box and heated to the set temperature of the cotton blending box; S54: Stranding: Make the mixed cotton filaments and fiber filaments into single yarns, and combine multiple single yarns according to the production process, and add a certain twist to process them into ply yarns.

4. The preparation method of the environment-friendly regenerated colored fiber blended yarn according to claim 3, characterized in that, In step S51, the cotton blending box in the preparation of the cotton blending box is composed of a relatively sealed space with a spraying mechanism arranged below it, and the cotton blending box can be heated to 80 - 90°C.

5. The preparation method of the environment-friendly recycled colored fiber blended yarn according to claim 3, characterized in that, In step S52, after injecting the fibers, the ratio of fiber filaments to cotton filaments is 7 - 8:3 - 2.

6. The preparation method of the environment-friendly recycled colored fiber blended yarn according to claim 2, characterized in that, In step S41, the coating application includes the following specific steps: S411: Adhesive formulation: Prepare the adhesive for applying on the fiber surface; S412: Adhesive application: Uniformly apply the adhesive on the fiber surface; S413: Oil agent ratio: Prepare an oil agent for coating on the surface of the adhesive; S414: Oil agent application: Evenly apply the oil agent on the surface of the adhesive.

7. The method for preparing the environment-friendly recycled colored fiber blended yarn according to claim 6, characterized in that, In the S41, for the adhesive ratio, the adhesive is composed of styrene-butadiene-styrene block copolymer, tackifying resin, and softening agent, and the ratio of styrene-butadiene-styrene block copolymer, tackifying resin, and softening agent is 100:10 - 15:25 - 30.

8. The preparation method of the environment-friendly recycled colored fiber blended yarn according to claim 6, wherein, In the S413, for the oil agent ratio, the oil agent is composed of methyl silicone oil, plasticizer, and wetting agent, and the ratio of methyl silicone oil, plasticizer, and wetting agent is 100:10:5 - 10.

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