RpET recycled flocking cloth and preparation process thereof

Abstract

The application relates to the field of flocked cloth, and discloses RPET regenerated flocked cloth and a preparation process thereof. The RPET regenerated flocked cloth comprises a regenerated base cloth layer and a regenerated flocked layer, the regenerated flocked layer is prepared by fixing modified RPET short fibers on the surface of the regenerated base cloth layer through an adhesive layer, the modified RPET short fibers are prepared from the following raw materials in parts by weight: 100 parts of regenerated polyester, 6-10 parts of a toughening agent, 5.5-8.5 parts of a dispersed filler and 0.5-1.5 parts of an antioxidant; the regenerated polyester is prepared from recycled polyester waste through crushing, pickling and modification by using a composite auxiliary agent; and the composite auxiliary agent is composed of methyl acryloyloxypropyl cyclotetrasiloxane and hydroxyl polyethylene glycol acrylamide. The RPET regenerated flocked cloth prepared by the application has good strength and wear resistance, the flocked uniformity is good, the flocked cloth is not prone to hair loss, and the RPET regenerated flocked cloth is suitable for high-end jewelry packaging boxes and glasses boxes.

Description

Technical Field

[0001] This application relates to the field of flocked fabrics, and in particular to an RPET recycled flocked fabric and its preparation process. Background Technology

[0002] Flocked fabric is a novel composite material formed by vertically and uniformly implanting short fibers (commonly known as "flocking fibers") into the surface of a substrate (such as woven, knitted, or non-woven fabric) coated with an adhesive under the action of a high-voltage electrostatic field, followed by drying and curing. This process imparts a dense, soft flocked surface to the substrate, significantly enhancing the material's tactile feel, three-dimensionality, and appearance, while also giving it excellent warmth retention, sound absorption, and abrasion resistance. Therefore, flocked fabric is widely used in high-end clothing, home textiles, exquisite packaging boxes, automotive interiors, and footwear materials, among other fields.

[0003] Currently, the industrial production of flocked fabric mainly adopts a process route based on virgin materials. Specifically, the substrate is usually a woven or knitted fabric made of virgin polyester (PET) or virgin nylon fibers to ensure that the base fabric has stable and high-strength physical properties. The flocking fibers are mostly made of virgin polyester through grinding, dyeing, and screening, characterized by stable conductivity, uniform length, and good electrostatic discharge resistance. In the production process, a layer of flocking adhesive is evenly coated on the surface of the substrate by roller coating or scraping. Then, in a high-voltage electrostatic field, the charged flocking fibers are vertically implanted into the adhesive layer. Finally, after drying, brushing, and finishing processes, a finished flocked fabric with stable quality is obtained.

[0004] With increasing global emphasis on sustainable development, particularly in major textile consumer markets like Europe and the US, stringent regulations have been imposed on the circular economy attributes and carbon footprint of products. To meet market demands for the proportion of recycled materials, the industry uses recycled raw materials to produce flocked fabrics, such as recycled polyester (RPET) staple fibers as flocking fibers and recycled polyester nonwoven fabric as the base fabric. However, flocked fabrics made using fully recycled material systems in existing technologies generally suffer from serious quality defects: on the one hand, due to the complex sources and poor batch stability of recycled RPET flocking fibers, uneven flocking, large density differences, and shedding are easily caused; on the other hand, the strength and abrasion resistance of recycled RPET flocking fibers cannot meet the requirements of high-end applications. Summary of the Invention

[0005] To address the problems of low strength, uneven flocking, easy shedding, and poor abrasion resistance in existing recycled flocked fabrics, this application provides an RPET recycled flocked fabric and its preparation process.

[0006] In a first aspect, this application provides an RPET recycled flocked fabric, which adopts the following technical solution: A recycled RPET flocked fabric includes a recycled base fabric layer and a recycled flocked layer. The recycled flocked layer is made by fixing modified RPET short fibers to the surface of the recycled base fabric layer through an adhesive layer. The modified RPET short fibers are made from the following raw materials in parts by weight: 100 parts recycled polyester 6-10 parts toughening agent 5.5-8.5 parts of dispersing filler Antioxidant 0.5-1.5 parts; The recycled polyester is obtained by crushing, pickling and modifying recycled polyester waste with composite additives; the composite additives are composed of methacryloyloxypropylcyclotetrasiloxane and hydroxyl polyethylene glycol acrylamide.

[0007] By adopting the above technical solution, the RPET recycled flocked fabric consists of a recycled base fabric layer and a recycled flocked layer fixed to the surface by an adhesive layer. Modified RPET short fibers are the main component of the recycled flocked layer. The recycled polyester is obtained by crushing, pickling, and modifying recycled polyester waste using composite auxiliaries. The methacryloyloxypropylcyclotetrasiloxane and hydroxyl polyethylene glycol acrylamide in the composite auxiliaries effectively improve the performance of the recycled polyester, increasing its strength and flexibility. Toughening agents enhance the toughness and elasticity of the short fibers. The synergistic effect of the recycled polyester and toughening agents further improves the overall performance of the modified RPET short fibers, giving them both good strength and good toughness, thereby improving the uniformity and stability of the flocking. Dispersing fillers can be uniformly dispersed in the polyester system, improving the strength and surface smoothness of the obtained modified RPET short fibers. Antioxidants prevent the oxidation of the modified RPET short fibers, extending their service life.

[0008] The RPET recycled flocked fabric obtained in this application has good strength and abrasion resistance, good flocking uniformity, and is not easy to shed, which can meet the usage requirements of high-end application fields such as high-end jewelry packaging boxes and eyeglass cases.

[0009] Preferably, the recycled polyester is prepared by the following steps: A1. The recycled polyester waste is crushed and screened to obtain recycled polyester particles with a particle size of 2-6mm. A2. Use pickling agent to pickle the recycled polyester particles, then wash with water to obtain pretreated recycled polyester particles. A3. Pretreated recycled polyester particles and composite additives are melt-extruded and granulated to obtain recycled polyester.

[0010] By adopting the above technical solution, the recycled polyester waste is first crushed and screened into particles with a diameter of 2-6mm, which makes the subsequent processing more uniform and efficient. The recycled polyester particles are acid-washed and water-washed with an acid pickling agent, which can effectively remove impurities and improve the purity of the pre-treated recycled polyester particles. The pre-treated recycled polyester particles and composite additives are melt-extruded and granulated. The composite additives can be used to modify the polyester, improve the performance of recycled polyester, and thus improve the strength, abrasion resistance, and flocking uniformity of the recycled flocked fabric, and reduce shedding.

[0011] Preferably, the recycled polyester is made from the following raw materials in parts by weight: 70-80 parts of pre-treated recycled polyester granules 6-9 parts of methacryloyloxypropylcyclotetrasiloxane 5-8 parts of hydroxyl-containing polyethylene glycol acrylamide.

[0012] By adopting the above technical solution, pretreated recycled polyester particles serve as the basic raw material for recycled polyester, providing it with the fundamental chemical structure and properties. Methacryloxypropylcyclotetrasiloxane improves the interactions between polyester molecular chains, enhancing the polyester's flexibility and processing performance, while also improving its weather resistance and chemical stability. Hydroxyethylene glycol acrylamide helps to better disperse with other additives during subsequent processing, improving overall performance. When these three components work synergistically, methacryloxypropylcyclotetrasiloxane and hydroxyethylene glycol acrylamide, as composite additives, are fully interwoven and dispersed with the pretreated recycled polyester particles during melt extrusion, improving both the strength and toughness of the polyester, as well as its crystallinity and flowability.

[0013] Preferably, the melt extrusion temperature in step A3 is 230-260°C.

[0014] By adopting the above technical solution and optimizing the melting temperature, the pretreated recycled polyester particles and composite additives can be fully melted and uniformly mixed, ensuring the stable performance of the recycled polyester, thereby resulting in better quality modified RPET short fibers.

[0015] Preferably, the toughening agent is composed of polyisoprene grafted with maleic anhydride and hydroxyl-terminated hyperbranched polyester in a weight ratio of 1:(1-2).

[0016] By adopting the above technical solution, polyisoprene grafted with maleic anhydride exhibits good flexibility and elasticity, effectively improving the toughness of recycled flocked fabric and reducing brittleness. The hydroxyl-terminated hyperbranched polyester, with its highly branched structure and abundant terminal hydroxyl groups, increases intermolecular interactions, further enhancing the material's toughness and strength. Polyisoprene grafted with maleic anhydride synergistically interacts with the hydroxyl-terminated hyperbranched polyester, achieving better dispersion in the recycled polyester matrix and forming a more stable structure, thereby synergistically enhancing the toughness and overall performance of RPET recycled flocked fabric.

[0017] Preferably, the dispersion filler is composed of silica and nano-molybdenum disulfide in a weight ratio of 1:(0.2-0.4).

[0018] By adopting the above technical solutions, silica can improve the hardness and wear resistance of the material, and nano-molybdenum disulfide has good lubricity, which can reduce the friction between fibers, and together improve the dispersion uniformity of each component in the modified RPET short fiber.

[0019] Preferably, the antioxidant is antioxidant 1010 and / or antioxidant 168.

[0020] By adopting the above technical solution and using antioxidant 1010 and / or antioxidant 168 as antioxidants, the antioxidant properties of recycled polyester can be improved, thereby enhancing the stability and durability of modified RPET staple fiber and RPET recycled flocked fabric, making the flocked fabric less prone to damage due to oxidation during use.

[0021] Secondly, this application provides a process for preparing RPET recycled flocked fabric, which adopts the following technical solution: A process for preparing RPET recycled flocked fabric includes the following steps: S1. Preparation of modified RPET short fibers: Recycled polyester, toughening agent, dispersing filler and antioxidant are mixed, melt spun, cut and prepared to obtain modified RPET short fibers; S2. Applying adhesive: Apply adhesive liquid to the surface of the recycled base fabric layer, and control the thickness of the adhesive layer formed after drying to be 15-25μm; S3. Electrostatic flocking: Modified RPET short fibers are flocked through a high-voltage electrostatic field, cured, washed, and dried to obtain RPET recycled flocked fabric.

[0022] By adopting the above technical solution, in step S1, recycled polyester, toughening agent, dispersant filler and antioxidant are mixed, melt-spun and cut to obtain modified RPET short fibers; in step S2, adhesive liquid is applied to the surface of the recycled base fabric layer and the thickness of the adhesive layer after drying is controlled to be 15-25μm. The appropriate thickness of the adhesive layer can ensure that the recycled flocking layer and the recycled base fabric layer have good bonding force; in step S3, the modified RPET short fibers are flocked through a high voltage electrostatic field, and then cured, washed and dried to obtain RPET recycled flocked fabric. The high voltage electrostatic field can make the short fibers uniformly implanted, and the subsequent treatment can remove impurities and stabilize the shape of the flocked fabric. The final RPET recycled flocked fabric has good strength and wear resistance, and the flocking uniformity is good and it is not easy to shed.

[0023] Preferably, the electrostatic field voltage is 60–80kV and the flocking time is 10–15s.

[0024] By adopting the above technical solutions, modified RPET short fibers can be implanted more evenly and firmly into the surface of the recycled base fabric layer, improving the uniformity of flocking, reducing shedding, and ensuring that the flocked fabric has good strength and abrasion resistance.

[0025] Preferably, the basis weight of the recycled base fabric layer is 40-60 g / m²; and the basis weight of the RPET recycled flocked fabric is 70-90 g / m².

[0026] By adopting the above technical solutions, controlling the basis weight of the recycled base fabric layer to 40-60 g / m² ensures that the base fabric has suitable strength and flexibility, guaranteeing the overall stability of the flocked fabric without affecting the feel due to excessive weight. Controlling the basis weight of the RPET recycled flocked fabric to 70-90 g / m² ensures that the flocked fabric has good texture and quality, meeting the weight and performance requirements of different application scenarios.

[0027] In summary, this application includes at least one of the following beneficial technical effects: 1. The RPET recycled flocked fabric of this application includes a recycled base fabric layer and a recycled flocked layer made by fixing modified RPET short fibers to the surface of the recycled base fabric layer through an adhesive layer. The modified RPET short fibers are made from a specific weight proportion of recycled polyester, toughening agent, dispersing filler and antioxidant. The recycled polyester is made from recycled polyester waste through crushing, pickling and modification with composite additives. The composite additives are composed of methacryloyloxypropylcyclotetrasiloxane and hydroxyl polyethylene glycol acrylamide. The resulting RPET recycled flocked fabric has good strength and abrasion resistance, good flocking uniformity, and is not easy to shed. It can meet the usage requirements of high-end application fields such as high-end jewelry packaging boxes and eyeglass cases.

[0028] 2. The toughening agent is composed of polyisoprene grafted with maleic anhydride and hydroxyl-terminated hyperbranched polyester, which enhances the toughness of the modified RPET short fibers, thereby giving the RPET recycled flocked fabric better strength and solving the problem of low strength of existing recycled flocked fabrics.

[0029] 3. The preparation process includes steps such as modified RPET short fiber preparation, adhesive coating, and electrostatic flocking, which gives the RPET recycled flocked fabric good abrasion resistance and makes it less prone to shedding, thus solving the problems of poor abrasion resistance and easy shedding of existing recycled flocked fabrics. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the embodiments.

[0031] The following are some of the sources and specifications of the raw materials used in this application. The raw materials used in the preparation examples and embodiments of this application can all be obtained commercially, including but not limited to the following models and manufacturers of raw materials. Raw materials with equivalent performance can also be used: 1. Recycled polyester waste: transparent PET packaging bottle waste from Guangzhou Tonghe Plastic Products Co., Ltd., with a tensile strength of 30-33.5MPa; 2. Hydroxy-coated polyethylene glycol acrylamide: n = 10 - 20; 3. Polyisoprene grafted with maleic anhydride: x = 700 - 750, y = 30 - 40; 4. Hydroxyl-terminated hyperbranched polyester: HyPer H2O; 5. Silica: Particle size 50-100nm; 6. Nano-molybdenum disulfide: Particle size 50-75nm; 7. Maleic anhydride grafted POE: Exxon, grafting rate 1-1.3MA%, melt index 0.6-2.0g / 10min (190℃, 2.16kg) 8. Recycled base fabric: Purchased from Dongguan Hengshi Nonwoven Spunlace Co., Ltd., 40-60g / m² nylon fabric; 9. Adhesive: Commercially available Z-98 acrylic electrostatic flocking adhesive, with a solid content of 38-40wt% and a viscosity (25℃) of 8.0-13.0 Pa·s.

[0032] Example of preparation of recycled polyester Preparation Example 1 Preparation Example 1 discloses a recycled polyester, which is prepared by the following steps: A1. The recycled polyester waste is crushed and screened to obtain recycled polyester particles with a particle size of 2-6mm. If the particle size is less than 2mm, it is directly screened out. If the particle size is greater than 6mm, it is crushed and screened again. A2. Use pickling agent to pickle the recycled polyester particles, control the pickling temperature at 35℃, pickle for 30 minutes, and then wash with water until pH=6 to obtain pretreated recycled polyester particles. A3. 7 kg of recycled polyester granules and a composite additive consisting of 0.6 kg of methacryloyloxypropylcyclotetrasiloxane and 0.8 kg of hydroxyl polyethylene glycol acrylamide were melt-extruded. The melt extrusion conditions were controlled as follows: extrusion screw speed 30 rpm, extrusion temperature: zone 1 230℃, zone 2 240℃, zone 3 250℃, zone 4 260℃, zone 5 260℃, die 255℃. After extrusion, the granules were water-cooled and pelletized to obtain recycled polyester. The pickling agent in step A2 consists of 5 wt% hydrochloric acid, 2 wt% sodium dodecylbenzenesulfonate, 1 wt% sodium citrate, and 92 wt% water.

[0033] Preparation Example 2 The difference between Preparation Example 2 and Preparation Example 1 lies in the different preparation process parameters and raw material amounts, as detailed below: A1. The recycled polyester waste is crushed and screened to obtain recycled polyester particles with a particle size of 2-6mm. If the particle size is less than 2mm, it is directly screened out. If the particle size is greater than 6mm, it is crushed and screened again. A2. Use pickling agent to pickle the recycled polyester particles, control the pickling temperature at 40℃, pickle for 25 minutes, and then wash with water until pH=6.5 to obtain pretreated recycled polyester particles. A3. 7.5 kg of recycled polyester granules and a composite additive consisting of 0.75 kg of methacryloyloxypropylcyclotetrasiloxane and 0.65 kg of hydroxyl polyethylene glycol acrylamide were melt-extruded. The melt extrusion conditions were controlled as follows: extrusion screw speed 40 rpm, extrusion temperature: zone 1 240℃, zone 2 245℃, zone 3 250℃, zone 4 255℃, zone 5 260℃, and die temperature 250℃. After extrusion, the granules were water-cooled and pelletized to obtain recycled polyester. Other conditions were the same as in preparation example 1.

[0034] Preparation Example 3 The difference between Preparation Example 3 and Preparation Example 1 lies in the different preparation process parameters and raw material amounts, as detailed below: A1. The recycled polyester waste is crushed and screened to obtain recycled polyester particles with a particle size of 2-6mm. If the particle size is less than 2mm, it is directly screened out. If the particle size is greater than 6mm, it is crushed and screened again. A2. Use pickling agent to pickle the recycled polyester particles, control the pickling temperature at 45℃, pickle for 20 minutes, and then wash with water until pH=7 to obtain pretreated recycled polyester particles. A3. 9 kg of recycled polyester granules and a composite additive consisting of 0.9 kg of methacryloyloxypropylcyclotetrasiloxane and 0.5 kg of hydroxyl polyethylene glycol acrylamide were melt-extruded. The melt extrusion conditions were controlled as follows: extrusion screw speed 40 rpm, extrusion temperature: zone 1 230℃, zone 2 235℃, zone 3 255℃, zone 4 260℃, zone 5 260℃, and die temperature 255℃. After extrusion, the granules were water-cooled and pelletized to obtain recycled polyester. Other conditions were the same as in preparation 1.

[0035] Preparation of Comparative Example 1 The difference between Comparative Example 1 and Preparation Example 1 is that hydroxyl polyethylene glycol acrylamide was replaced with an equal amount of methacryloyloxypropylcyclotetrasiloxane, while the rest was the same as Preparation Example 1.

[0036] Preparation of Comparative Example 2 The difference between Comparative Example 2 and Preparation Example 1 is that methacryloyloxypropylcyclotetrasiloxane was replaced with an equal amount of dioctyl sebacate, otherwise the same as Preparation Example 1.

[0037] Preparation of Comparative Example 3 The difference between Comparative Example 3 and Preparation Example 1 is as follows: A1. The recycled polyester waste is crushed and screened to obtain recycled polyester particles with a particle size of 2-6mm. If the particle size is less than 2mm, it is directly screened out. If the particle size is greater than 6mm, it is crushed and screened again. A2. The recycled polyester particles were pickled using an acid pickling agent. The pickling temperature was controlled at 45°C and the pickling time was 20 minutes. After that, the particles were washed with water until the pH reached 7 to obtain recycled polyester. The rest of the process was the same as in Preparation Example 1.

[0038] Example

[0039] Example 1 Example 1 discloses a recycled RPET flocked fabric, comprising a recycled base fabric layer and a recycled flocked layer, wherein the recycled flocked layer is made by fixing modified RPET short fibers to the surface of the recycled base fabric layer through an adhesive layer.

[0040] The preparation process of this RPET recycled flocked fabric includes the following steps: S1. Preparation of modified RPET staple fiber: 10 kg of recycled polyester obtained in Preparation Example 1, 1 kg of toughening agent composed of maleic anhydride-grafted POE and maleic anhydride-grafted polybutadiene in a weight ratio of 1:1, 0.55 kg of silica as a dispersing filler, and 0.05 kg of antioxidant composed of antioxidant 1010 and antioxidant 168 in a weight ratio of 1:1 were mixed and melt-spun using a melt spinning machine with the following parameters: melt speed of 30 rpm, melt temperature of 220℃ in zone 1, 230℃ in zone 2, 240℃ in zone 3, 250℃ in zone 4, 250℃ in zone 5, die temperature of 255℃, and spinning temperature of 260℃. After cutting, modified RPET staple fiber was obtained. The specification of the modified RPET staple fiber is 1.2D*0.5 inches. S2. Applying adhesive: Apply adhesive liquid to the surface of the recycled base fabric layer with a basis weight of 40 g / m², and control the thickness of the adhesive layer formed after drying to be 15 μm; S3. Electrostatic flocking: Modified RPET short fibers are flocked through a high-voltage electrostatic field with a voltage of 60kV and a flocking time of 15s. Then, the fibers are cured at a temperature of 145℃ for 20min. After washing and drying, a RPET recycled flocked fabric with a basis weight of 70g / m² is obtained.

[0041] Example 2-3 The difference between Examples 2-3 and Example 1 lies in the amount of raw materials used and the preparation process parameters, as detailed in Table 1 below.

[0042] Table 1 Parameter table for Examples 1-3

[0043] Example 4 The difference between Example 4 and Example 1 is that the dispersing filler is composed of silicon dioxide and nano molybdenum disulfide in a weight ratio of 1:0.2, while the rest is the same as in Example 1.

[0044] Example 5 The difference between Example 5 and Example 1 is that the dispersing filler is composed of silicon dioxide and nano molybdenum disulfide in a weight ratio of 1:0.4, while the rest is the same as in Example 1.

[0045] Example 6 The difference between Example 6 and Example 5 is that the toughening agent is composed of polyisoprene grafted with maleic anhydride and hydroxyl-terminated hyperbranched polyester in a weight ratio of 1:1, while the rest is the same as in Example 5.

[0046] Example 7 The difference between Example 7 and Example 5 is that the toughening agent is composed of polyisoprene grafted with maleic anhydride and hydroxyl-terminated hyperbranched polyester in a weight ratio of 1:2, while the rest is the same as in Example 5.

[0047] Comparative Example Comparative Example 1 The difference between Comparative Example 1 and Example 1 is that the recycled polyester was derived from the preparation of Comparative Example 1, while the rest is the same as Example 1.

[0048] Comparative Example 2 The difference between Comparative Example 2 and Example 1 is that the recycled polyester was derived from the preparation of Comparative Example 2, while the rest is the same as Example 1.

[0049] Comparative Example 3 The difference between Comparative Example 3 and Example 1 is that the recycled polyester was derived from the preparation of Comparative Example 3, while the rest is the same as Example 1.

[0050] Performance testing The following tests were conducted on the performance of the RPET recycled flocked fabrics prepared in Examples 1-7 and Comparative Examples 1-3: 1. Flocking fastness test Refer to the test method in FZ / T 64011-2012 to test the flocking fastness (unit: times) of RPET recycled flocked fabric. A flocking fastness of 8000 times or more is considered qualified. 2. Tear strength test According to the test method in FZ / T 64011-2012, the tear strength (unit: N) of RPET recycled flocked fabric is tested, and it is qualified if it is greater than or equal to 8N; 3. Water wash resistance test Refer to the test method in FZ / T 64011-2012 to test the washed appearance (unit: grade) of RPET recycled flocked fabric. A grade of 4 or higher is considered qualified.

[0051] The following are the performance test data of the RPET recycled flocked fabrics prepared in Examples 1-7 and Comparative Examples 1-3, as detailed in Table 2 below.

[0052] Table 2 Performance data of RPET recycled flocked fabrics prepared in Examples 1-7 and Comparative Examples 1-3

[0053] Based on Examples 1-3 and Comparative Examples 1-3, and in conjunction with Table 2, it can be concluded that using the specific process and components of this application to prepare flocked fabric with recycled polyester can significantly improve the strength and abrasion resistance of the flocked fabric, while also enhancing the stability of the flocking process. In Comparative Examples 1-3, the types and proportions of the composite auxiliaries were changed, resulting in a significant decrease in the flocking fastness and tear strength of the flocked fabric, as well as a reduction in its wash resistance and varying degrees of lint shedding. This may be due to the reduced strength and flexibility of the recycled polyester, affecting the uniformity and stability of the flocking process.

[0054] Combining Examples 1 and 4-5 with Table 2, it can be concluded that the type and proportion of the dispersing filler were further optimized in Examples 4-5, resulting in improved flocking fastness, tear strength, and water washability of the flocked fabric. This may be because the better proportion of silica and nano molybdenum disulfide has a better synergistic effect, which improves the abrasion resistance and flexibility of the flocked fabric.

[0055] Compared to Example 5, Examples 6-7 further optimized the type of toughening agent, resulting in improved flocking fastness, tear strength, and water resistance of the flocked fabric.

[0056] As can be seen from the above, the recycled polyester and toughening agent of this application have a good synergistic effect and can play a good role in optimizing the performance of flocked fabric.

[0057] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A type of RPET recycled flocked fabric, characterized in that, It includes a recycled base fabric layer and a recycled flocking layer. The recycled flocking layer is made by fixing modified RPET short fibers to the surface of the recycled base fabric layer through an adhesive layer. The modified RPET short fibers are made from the following raw materials in parts by weight: 100 parts recycled polyester 6-10 parts toughening agent 5.5-8.5 parts of dispersing filler Antioxidant 0.5-1.5 parts; The recycled polyester is obtained by crushing, pickling and modifying recycled polyester waste with composite additives; the composite additives are composed of methacryloyloxypropylcyclotetrasiloxane and hydroxyl polyethylene glycol acrylamide.

2. The RPET recycled flocked fabric according to claim 1, characterized in that, The recycled polyester is obtained by the following steps: A1. The recycled polyester waste is crushed and screened to obtain recycled polyester particles with a particle size of 2-6mm. A2. Use pickling agent to pickle the recycled polyester particles, then wash with water to obtain pretreated recycled polyester particles. A3. Pretreated recycled polyester particles and composite additives are melt-extruded and granulated to obtain recycled polyester.

3. The RPET recycled flocked fabric according to claim 2, characterized in that, The recycled polyester is obtained from the following raw materials in parts by weight: 70-80 parts of pre-treated recycled polyester granules 6-9 parts of methacryloyloxypropylcyclotetrasiloxane 5-8 parts of hydroxyl-containing polyethylene glycol acrylamide.

4. The RPET recycled flocked fabric according to claim 2, characterized in that, The melt extrusion temperature in step A3 is 230-260℃.

5. The RPET recycled flocked fabric according to claim 1, characterized in that, The toughening agent is composed of polyisoprene grafted with maleic anhydride and hydroxyl-terminated hyperbranched polyester in a weight ratio of 1:(1-2).

6. The RPET recycled flocked fabric according to claim 1, characterized in that, The dispersion filler is composed of silica and nano-molybdenum disulfide in a weight ratio of 1:(0.2-0.4).

7. The RPET recycled flocked fabric according to claim 1, characterized in that, The antioxidant is antioxidant 1010 and / or antioxidant 168.

8. A process for preparing a recycled RPET flocked fabric as described in any one of claims 1-7, characterized in that, Includes the following steps: S1. Preparation of modified RPET short fibers: Recycled polyester, toughening agent, dispersing filler and antioxidant are mixed, melt spun, cut and prepared to obtain modified RPET short fibers; S2. Applying adhesive: Apply adhesive liquid to the surface of the recycled base fabric layer, and control the thickness of the adhesive layer formed after drying to be 15-25μm; S3. Electrostatic flocking: Modified RPET short fibers are flocked through a high-voltage electrostatic field, cured, washed, and dried to obtain RPET recycled flocked fabric.

9. The preparation process of RPET recycled flocked fabric according to claim 8, characterized in that, The electrostatic field voltage is 60–80kV, and the flocking time is 10–15s.

10. The preparation process of RPET recycled flocked fabric according to claim 8, characterized in that, The weight of the recycled base fabric layer is 40-60 g / m²; the weight of the RPET recycled flocked fabric is 70-90 g / m².

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