A pet raised-loop recyclable yarn and automobile carpet

Abstract

The application relates to the technical field of automobile parts, and particularly discloses a PET flocking recyclable yarn and an automobile carpet, wherein the PET flocking recyclable yarn is composed of modified polyester fibers and wool fibers; the modified polyester fibers comprise the following raw materials: PET chips, a flame retardant, hemp stem core superfine powder, nano silicon dioxide and a lubricant; the formula of the above scheme is simple, the obtained PET flocking recyclable yarn has excellent flame retardance, remarkable wear resistance and good mechanical properties, and can be recycled and reused; the automobile carpet comprises a carpet surface layer, an anti-skid layer and an antibacterial layer in sequence, and the layers are bonded through an adhesive; the carpet surface layer is spun from the PET flocking recyclable yarn; the anti-skid layer is formed by a layer structure of foaming material; the obtained automobile carpet has excellent comprehensive performance and wide market prospects.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and more specifically, to a PET napped recyclable yarn and automotive carpet. Background Technology

[0002] With the continuous growth of the economy and the improvement of people's living standards, automobiles have gradually become one of the important means of transportation in people's daily lives. The car body is made of iron plates through stamping and welding, and the floor of the car body is no exception. In order to better protect the floor, carpets are often laid on the floor. Car carpets can not only improve the aesthetics and comfort of the car interior, but also cover and fix the car's wiring. Therefore, car carpets are of great significance.

[0003] In today's society, with scarce resources, the recyclability of materials is particularly important. Currently, polyester (PET) is commonly used as the surface layer of automotive carpets. However, the existing abrasion resistance and aging resistance of polyester cannot meet the high requirements for recycling and reuse. Furthermore, the flame retardancy of polyester fibers does not adequately meet the high-performance requirements of automotive carpets. These problems limit the application prospects of polyester in automotive carpets. Therefore, there is an urgent need to develop a PET pile recyclable yarn and automotive carpet to address the issues of poor abrasion resistance, aging resistance, and flame retardancy when using existing polyester as the surface layer of automotive carpets. This would allow PET pile recyclable yarn to be better utilized in automotive carpets and would also have sustainable development significance. Summary of the Invention

[0004] To address the issues of poor abrasion resistance, aging resistance, and flame retardancy when using existing polyester as the surface layer of automotive carpets, this application provides a PET pile recyclable yarn and an automotive carpet.

[0005] In the first aspect, this application provides a PET napped recyclable yarn, which adopts the following technical solution: A PET napped recyclable yarn composed of modified polyester fibers and wool fibers; The modified polyester fiber has a fineness of 8-10 μm; the wool fiber has a fineness of 17.5-35.5 μm. The modified polyester fiber comprises the following raw materials in parts by weight: 60-80 parts PET chips, 10-15 parts flame retardant, 8-9 parts hemp stalk core ultrafine powder, 5-10 parts nano silica, and 1-3 parts lubricant.

[0006] By adopting the above technical solution, the PET napped recyclable yarn of this application is composed of modified polyester fiber and wool fiber, and the fineness of the fiber is controlled, so that the PET napped recyclable yarn has excellent mechanical properties. At the same time, the modified polyester fiber contains raw materials such as PET chips, flame retardant, hemp stalk core ultrafine powder, nano silica, and lubricant. PET has good mechanical properties and chemical stability, and is strong and durable. The hemp stalk core ultrafine powder has rich pores and good connectivity, large specific surface area, and excellent moisture absorption and breathability. Therefore, the hemp stalk core ultrafine powder can effectively improve the moisture absorption and breathability of the modified polyester fiber. Moreover, the hemp stalk core ultrafine powder has adsorption properties, which can reduce the content of VOCs, which has the significance of green environmental protection. Nano silica can improve the wear resistance and aging resistance of the modified polyester fiber. The combination of modified polyester fiber and wool fiber in this application greatly improves the flame retardancy, wear resistance, aging resistance and mechanical properties of the PET napped recyclable yarn. In addition, the PET napped yarn is recyclable, which has the significance of sustainable development.

[0007] Preferably, the flame retardant comprises the following raw materials in parts by weight: 6-12 parts guanidine aminosulfonate, 4-8 parts iminodisuccinic acid, 1-2 parts carbodiimide, 15-17 parts attapulgite, 10-30 parts ethanol, and 5-10 parts water.

[0008] Preferably, the flame retardant is prepared by the following method: Attapulgite is calcined in a muffle furnace at 260-350℃ for 1-1.5 hours to obtain pretreated attapulgite. Iminodisuccinic acid and carbodiimide were added to water and activated for 30-50 minutes. Guanidine aminosulfonate was added and the reaction was continued at 6-10℃ for 6-8 hours to obtain modified guanidine aminosulfonate. Pretreated attapulgite clay was added to modified guanidine aminosulfonate, and the pH was adjusted to 3-5. The mixture was reacted at a speed of 400-500 r / min and a temperature of 30-40℃ for 30-50 min. Finally, the mixture was precipitated with ethanol, washed, and filtered to obtain the flame retardant.

[0009] By adopting the above technical solution, guanidine aminosulfonate is a good flame retardant. In this application, guanidine aminosulfonate is modified with iminodisuccinic acid. Guanidine aminosulfonate undergoes an acylation reaction with aminodisuccinic acid, introducing carboxyl groups and increasing the number of active groups on the surface of guanidine aminosulfonate. At the same time, attapulgite is selected. Attapulgite has a good aspect ratio and abundant internal channels, making it both an excellent reinforcing material and a good flame retardant. High-temperature calcination of attapulgite increases the number of active groups on its surface, which is conducive to the combination of attapulgite and modified guanidine aminosulfonate to form an aminosulfonate-attapulgite composite with significant flame retardant properties. At the same time, it has good compatibility with other components in modified polyester fibers, which can effectively improve the mechanical properties of modified polyester fibers, thereby improving the flame retardant and abrasion resistance of PET napped recyclable yarn, making it easy to recycle multiple times. In addition, this application controls various process parameters during the preparation of flame retardants to make the flame retardants perform better and improve the flame retardant properties of PET napped recyclable yarn.

[0010] Preferably, the lubricant is obtained by mixing pentaerythritol stearate and erucamide in a mass ratio of (11-15):13.

[0011] By adopting the above technical solution, this application uses a compound of pentaerythritol stearate and erucamide as a lubricant and controls the mass ratio. The two work synergistically to reduce the friction between the components in the modified polyester fiber, making the performance of the modified polyester fiber more stable, and thus effectively improving the mechanical properties of PET napped recyclable yarn.

[0012] Preferably, the modified polyester fiber is prepared by the following method: First, PET chips, flame retardant, hemp stalk core ultrafine powder, nano silica, and lubricant are mixed at a speed of 1000-1500 r / min for 10-20 min to obtain a premix; then, the premix is ​​melt-spun to obtain modified polyester fiber.

[0013] Preferably, the melt spinning process comprises: spinning, cooling, oiling, drawing, heat setting, and winding; wherein the spinning temperature is 200-230℃, the spinning speed is 3600-4000m / min, the total draw ratio is 1.5-4.5 times, the heat setting temperature is 120-130℃, and the winding speed is 2000-3000m / min.

[0014] By adopting the above technical solution, this application obtains modified polyester fibers through melt spinning and controls various process parameters to make the obtained modified polyester fibers have excellent mechanical properties, flame retardant properties, good moisture absorption and breathability, and good wear resistance, thereby making the overall performance of PET napped recyclable yarn even better.

[0015] Preferably, the wool fibers are further pretreated, specifically as follows: Wool fibers are added to the soaking solution and soaked for 40-60 minutes. Then they are placed in an oven and dried at 40-50℃ for 1-2 hours to obtain pretreated wool fibers.

[0016] Preferably, the soaking solution comprises the following raw materials in parts by weight: 1-5 parts hydrogen peroxide, 7-9 parts succinic acid, 2-3 parts ammonium polyphosphate, 10-13 parts chitosan, 20-30 parts waterborne polyurethane, and 7-9 parts polyethylene glycol.

[0017] Preferably, the soaking solution is prepared by the following method: Take hydrogen peroxide, succinic acid, ammonium polyphosphate, chitosan, waterborne polyurethane, and polyethylene glycol by weight, and mix them evenly to obtain the soaking solution.

[0018] By adopting the above technical solution, this application uses hydrogen peroxide, succinic acid, ammonium polyphosphate, chitosan, waterborne polyurethane, polyethylene glycol and other raw materials to prepare an soaking solution. Wool fibers are added to the soaking solution. The hydrogen peroxide and succinic acid in the soaking solution work together to change the scale layer structure on the surface of the wool fibers, thereby improving the wool's anti-felting properties. At the same time, chitosan, ammonium polyphosphate, waterborne polyurethane and polyethylene glycol work synergistically to give the wool fibers excellent properties such as flame retardancy, antibacterial, antistatic and waterproof properties, further optimizing the comprehensive performance of PET napped recyclable yarn.

[0019] Preferably, the PET napped recyclable yarn is obtained by the following method: First, modified polyester fiber and wool fiber are blended at a blending weight ratio of (70 / 30)-(90 / 10), and then the napping process is carried out using a speed-increasing roller group with a speed-increasing ratio of 1.2-1.6 to obtain PET napped recyclable yarn.

[0020] By adopting the above technical solution, the PET napped recyclable yarn of this application is obtained by blending modified polyester fiber and wool fiber in a certain blending weight ratio, followed by napping processing. By controlling various process parameters, the cohesion of modified polyester fiber and wool fiber is enhanced, making the PET napped recyclable yarn more superior in all aspects. At the same time, the preparation process of PET napped recyclable yarn is effectively optimized, production efficiency is improved, and production costs are reduced.

[0021] Secondly, this application provides an automotive carpet, which sequentially includes a carpet surface layer, an anti-slip layer, and an antibacterial layer, with the layers bonded together by an adhesive; The carpet surface layer is made of recycled PET napped yarn; the anti-slip layer is a layer structure formed by foam material.

[0022] By adopting the above technical solution, the automotive carpet of this application sequentially includes a carpet surface layer, an anti-slip layer, and an antibacterial layer. The layers are bonded together with an adhesive, and the carpet surface layer is spun from recycled PET pile yarn, ultimately resulting in a multifunctional automotive carpet. The anti-slip layer has shock-absorbing and sound-absorbing properties, improving user comfort. The carpet surface layer has wear-resistant, aging-resistant, and flame-retardant properties, increasing the service life of the automotive carpet. The antibacterial layer can effectively prevent the growth of bacteria in the carpet and the areas where the automotive carpet contacts the car chassis.

[0023] Preferably, the car carpet is manufactured by the following method: S1. Preparation of the blanket surface layer: Twist the recycled PET napped yarn into 65 / 2-75 / 2 yarn as warp and weft yarns, and weave it into a greige fabric; the greige fabric is then shaped, ironed and cut to obtain the blanket surface layer; S2. Preparation of automotive carpet: The carpet surface layer, anti-slip layer and antibacterial layer are bonded in sequence with an adhesive to obtain the initial product; then the initial product is hot-pressed at a temperature of 140-160℃ to obtain the automotive carpet.

[0024] By adopting the above technical solution, this application first prepares the carpet surface layer by twisting recycled PET pile yarn as warp and weft yarns to weave a greige fabric. The greige fabric is then shaped, cut, and ironed to obtain the carpet surface layer. The resulting carpet surface layer has good flame retardant properties, is waterproof, wear-resistant, and anti-aging, and can be recycled and reused. The carpet surface layer, anti-slip layer, and antibacterial layer are bonded together with an adhesive and then hot-pressed to obtain an automotive carpet. Furthermore, by controlling the various process parameters, the overall performance of the automotive carpet is improved, giving it a broader market prospect.

[0025] In summary, this application has the following beneficial effects: 1. The PET napped recyclable yarn of this application is obtained by blending modified polyester fiber and wool fiber; the modified polyester fiber is made by melt spinning of raw materials such as PET chips, flame retardant, hemp stalk core ultrafine powder, nano silica, and lubricant. The resulting modified polyester fiber has excellent flame retardant properties, significant wear resistance, and good mechanical properties; the wool fiber is pretreated with an immersion solution to give it excellent properties such as flame retardancy, antibacterial, antistatic, and waterproof properties. The PET napped recyclable yarn of this application has excellent comprehensive performance, is of significance for sustainable development, and can be better used in automotive carpets.

[0026] 2. The car carpet of this application comprises a carpet surface layer, an anti-slip layer, and an antibacterial layer in sequence. The layers are bonded together with an adhesive, and the carpet surface layer is spun from the PET pile recyclable yarn of this application. The preparation method of the car carpet is simple, the preparation cost is low, and it is suitable for industrial production. The resulting car carpet has excellent performance and can better meet people's requirements for a high-quality life. Detailed Implementation

[0027] The present application will be further described in detail below with reference to the embodiments.

[0028] Preparation Examples 1-5 and Comparative Preparation Examples 1 and 2 provide flame retardants and their preparation methods.

[0029] Preparation Example 1 The flame retardant comprises the following raw materials: 6 kg guanidine aminosulfonate, 4 kg iminodisuccinic acid, 1 kg carbodiimide, 15 kg attapulgite, 10 kg ethanol, and 5 kg water.

[0030] Flame retardants are prepared by the following methods: Attapulgite was calcined in a muffle furnace at 260°C for 1.5 hours to obtain pretreated attapulgite. Iminodisuccinic acid and carbodiimide were added to water and activated for 30 min. Guanidine aminosulfonate was added and the reaction was continued at 6 °C for 8 h to obtain modified guanidine aminosulfonate. Pretreated attapulgite was added to modified guanidine aminosulfonate, and the pH was adjusted to 3. The mixture was reacted at 400 r / min and 30℃ for 30 min. Finally, the mixture was precipitated with ethanol, washed, and filtered to obtain the flame retardant.

[0031] Preparation Example 2 The flame retardant comprises the following raw materials: 7 kg guanidine aminosulfonate, 5 kg iminodisuccinic acid, 1.2 kg carbodiimide, 15.5 kg attapulgite, 15 kg ethanol, and 6 kg water.

[0032] Flame retardants are prepared by the following methods: Attapulgite was calcined in a muffle furnace at 280°C for 1.4 hours to obtain pretreated attapulgite. Iminodisuccinic acid and carbodiimide were added to water and activated for 35 min. Guanidine aminosulfonate was added and the reaction was continued at 7 °C for 7.5 h to obtain modified guanidine aminosulfonate. Pretreated attapulgite was added to modified guanidine aminosulfonate, and the pH was adjusted to 3.5. The mixture was reacted at 450 r / min and 32℃ for 35 min. Finally, the mixture was precipitated with ethanol, washed, and filtered to obtain the flame retardant.

[0033] Preparation Example 3 The flame retardant comprises the following raw materials: 9 kg guanidine aminosulfonate, 6 kg iminodisuccinic acid, 1.5 kg carbodiimide, 16 kg attapulgite, 20 kg ethanol, and 7.5 kg water.

[0034] Flame retardants are prepared by the following methods: Attapulgite was calcined in a muffle furnace at 300°C for 1.2 hours to obtain pretreated attapulgite. Iminodisuccinic acid and carbodiimide were added to water and activated for 40 min. Guanidine aminosulfonate was added and the reaction was continued at 8 °C for 7 h to obtain modified guanidine aminosulfonate. Pretreated attapulgite was added to modified guanidine aminosulfonate, and the pH was adjusted to 4. The mixture was reacted at 450 r / min and 35℃ for 40 min. Finally, the mixture was precipitated with ethanol, washed, and filtered to obtain the flame retardant.

[0035] Preparation Example 4 The flame retardant comprises the following raw materials: 10 kg guanidine aminosulfonate, 7 kg iminodisuccinic acid, 1.8 kg carbodiimide, 16.5 kg attapulgite, 25 kg ethanol, and 8 kg water.

[0036] Flame retardants are prepared by the following methods: Attapulgite was calcined in a muffle furnace at 320°C for 1.1 h to obtain pretreated attapulgite. Iminodisuccinic acid and carbodiimide were added to water and activated for 45 min. Guanidine aminosulfonate was added and the reaction was continued at 9 °C for 6.5 h to obtain modified guanidine aminosulfonate. Pretreated attapulgite was added to modified guanidine aminosulfonate, and the pH was adjusted to 4.5. The mixture was reacted at 480 r / min and 38℃ for 45 min. Finally, the mixture was precipitated with ethanol, washed, and filtered to obtain the flame retardant.

[0037] Preparation Example 5 The flame retardant comprises the following raw materials: 12 kg guanidine aminosulfonate, 8 kg iminodisuccinic acid, 2 kg carbodiimide, 17 kg attapulgite, 30 kg ethanol, and 10 kg water.

[0038] Flame retardants are prepared by the following methods: Attapulgite was calcined in a muffle furnace at 350°C for 1 hour to obtain pretreated attapulgite. Iminodisuccinic acid and carbodiimide were added to water and activated for 50 min. Guanidine aminosulfonate was added and the reaction was continued at 10 °C for 6 h to obtain modified guanidine aminosulfonate. Pretreated attapulgite was added to modified guanidine aminosulfonate, and the pH was adjusted to 5. The mixture was reacted at 500 r / min and 40℃ for 50 min. Finally, the mixture was precipitated with ethanol, washed, and filtered to obtain the flame retardant.

[0039] Comparative Preparation Example 1 Comparative Preparation Example 1 is the same as Preparation Example 1, except that iminodisuccinic acid is not added.

[0040] Comparative Preparation Example 2 In comparison with preparation example 2, the only difference from preparation example 1 is that the attapulgite soil was not pretreated.

[0041] Preparation Examples 6-10 and Comparative Preparation Examples 3-7 provide modified polyester fibers and their preparation methods.

[0042] Preparation Example 6 Modified polyester fiber, comprising the following raw materials: 60kg PET chips, 10kg flame retardant, 8kg hemp stalk core ultrafine powder, 5kg nano silica, and 1kg lubricant; The flame retardant is from Preparation Example 1; the lubricant is a mixture of pentaerythritol stearate and erucamide in a mass ratio of 11:13.

[0043] Modified polyester fibers are obtained by the following method: First, PET chips, flame retardant, hemp stalk core ultrafine powder, nano silica, and lubricant are mixed at a speed of 10001 r / min for 10 min to obtain a premix; then, the premix is ​​melt-spun to obtain modified polyester fibers with a fineness of 8 μm. The melt spinning process includes spinning, cooling, oiling, drawing, heat setting, and winding. The spinning temperature is 200℃, the spinning speed is 3600m / min, the total drawing ratio is 1.5, the heat setting temperature is 120℃, and the winding speed is 2000m / min.

[0044] Preparation Example 7 Modified polyester fiber, comprising the following raw materials: 65kg PET chips, 12kg flame retardant, 8.2kg hemp stalk core ultrafine powder, 7kg nano silica, and 1.5kg lubricant; The flame retardant is from Preparation Example 2; the lubricant is obtained by mixing pentaerythritol stearate and erucamide in a mass ratio of 12:13.

[0045] Modified polyester fibers are obtained by the following method: First, PET chips, flame retardant, hemp stalk core ultrafine powder, nano silica, and lubricant are mixed at 1200 r / min for 12 min to obtain a premix; then, the premix is ​​melt-spun to obtain modified polyester fibers with a fineness of 8.5 μm. The melt spinning process includes spinning, cooling, oiling, drawing, heat setting, and winding. The spinning temperature is 210℃, the spinning speed is 3700m / min, the total drawing ratio is 2, the heat setting temperature is 122℃, and the winding speed is 2200m / min.

[0046] Preparation Example 8 Modified polyester fiber, comprising the following raw materials: 70kg PET chips, 13kg flame retardant, 8.5kg hemp stalk core ultrafine powder, 8kg nano silica, and 2kg lubricant; The flame retardant was prepared in Example 3; the lubricant was prepared by mixing pentaerythritol stearate and erucamide in a mass ratio of 1:1.

[0047] Modified polyester fibers are obtained by the following method: First, PET chips, flame retardant, hemp stalk core ultrafine powder, nano silica, and lubricant are mixed at 1300 r / min for 15 min to obtain a premix; then, the premix is ​​melt-spun to obtain modified polyester fibers with a fineness of 9 μm. The melt spinning process includes spinning, cooling, oiling, drawing, heat setting, and winding. The spinning temperature is 215℃, the spinning speed is 3800m / min, the total drawing ratio is 2.5 times, the heat setting temperature is 125℃, and the winding speed is 2500m / min.

[0048] Preparation Example 9 Modified polyester fiber, comprising the following raw materials: 75kg PET chips, 14kg flame retardant, 8.8kg hemp stalk core ultrafine powder, 9kg nano silica, and 2.5kg lubricant; The flame retardant was prepared in Example 4; the lubricant was prepared by mixing pentaerythritol stearate and erucamide in a mass ratio of 14:13.

[0049] Modified polyester fibers are obtained by the following method: First, PET chips, flame retardant, hemp stalk core ultrafine powder, nano silica, and lubricant are mixed at 1400 r / min for 18 min to obtain a premix; then, the premix is ​​melt-spun to obtain modified polyester fibers with a fineness of 9.5 μm. The melt spinning process includes spinning, cooling, oiling, drawing, heat setting, and winding. The spinning temperature is 225℃, the spinning speed is 3900m / min, the total drawing ratio is 4, the heat setting temperature is 128℃, and the winding speed is 2800m / min.

[0050] Preparation Example 10 Modified polyester fiber, comprising the following raw materials: 80kg PET chips, 15kg flame retardant, 9kg hemp stalk core ultrafine powder, 10kg nano silica, and 3kg lubricant; The flame retardant was prepared in Example 5; the lubricant was prepared by mixing pentaerythritol stearate and erucamide in a mass ratio of 15:13.

[0051] Modified polyester fibers are obtained by the following method: First, PET chips, flame retardant, hemp stalk core ultrafine powder, nano silica, and lubricant are mixed at 1500 r / min for 20 min to obtain a premix; then, the premix is ​​melt-spun to obtain modified polyester fibers with a fineness of 10 μm. The melt spinning process includes spinning, cooling, oiling, drawing, heat setting, and winding. The spinning temperature is 230℃, the spinning speed is 4000m / min, the total drawing ratio is 4.5 times, the heat setting temperature is 130℃, and the winding speed is 3000m / min.

[0052] Comparative preparation example 3 Compared with Preparation Example 3, the only difference from Preparation Example 6 is that no nano-silica was added.

[0053] Comparative preparation example 4 Compared with Preparation Example 4, the only difference from Preparation Example 6 is that hemp stalk core ultrafine powder is not added.

[0054] Comparative preparation example 5 Compared with Preparation Example 5, the only difference from Preparation Example 6 is that no flame retardant is added.

[0055] Comparative preparation example 6 Comparative Preparation Example 6 is the same as Preparation Example 6, except that the flame retardant is the same as that in Comparative Preparation Example 1.

[0056] Comparative preparation example 7 Comparative Preparation Example 7 is the same as Preparation Example 6, except that the flame retardant is Comparative Preparation Example 2.

[0057] Preparation Examples 11-15 provide a method for pretreatment of wool fibers.

[0058] Preparation Example 11 Select wool fibers with a fineness of 17.5μm; add the wool fibers to the soaking solution and soak for 40 minutes, then place them in an oven and dry at 40℃ for 2 hours to obtain pretreated wool fibers; The soaking solution is prepared by uniformly mixing 1 kg hydrogen peroxide, 7 kg succinic acid, 2 kg ammonium polyphosphate, 10 kg chitosan, 20 kg waterborne polyurethane, and 7 kg polyethylene glycol.

[0059] Preparation Example 12 Select wool fibers with a fineness of 20μm; add the wool fibers to the soaking solution and soak for 45 minutes, then place them in an oven and dry at 42℃ for 1.8 hours to obtain pretreated wool fibers; The soaking solution is prepared by uniformly mixing 2 kg hydrogen peroxide, 7.5 kg succinic acid, 2.2 kg ammonium polyphosphate, 11 kg chitosan, 22 kg waterborne polyurethane, and 7.8 kg polyethylene glycol.

[0060] Preparation Example 13 Select wool fibers with a fineness of 25μm; add the wool fibers to the soaking solution and soak for 50 minutes, then place them in an oven and dry at 45℃ for 1.5 hours to obtain pretreated wool fibers; The soaking solution is prepared by uniformly mixing 3 kg hydrogen peroxide, 8 kg succinic acid, 2.5 kg ammonium polyphosphate, 12 kg chitosan, 25 kg waterborne polyurethane, and 8.2 kg polyethylene glycol.

[0061] Preparation Example 14 Select wool fibers with a fineness of 30μm; add the wool fibers to the soaking solution and soak for 55 minutes, then place them in an oven and dry at 48℃ for 1.2 hours to obtain pretreated wool fibers; The soaking solution is prepared by uniformly mixing 4 kg hydrogen peroxide, 8.5 kg succinic acid, 2.8 kg ammonium polyphosphate, 12.5 kg chitosan, 28 kg waterborne polyurethane, and 8.7 kg polyethylene glycol.

[0062] Preparation Example 15 Select wool fibers with a fineness of 35.5μm; add the wool fibers to the soaking solution and soak for 60 minutes, then place them in an oven and dry at 50℃ for 1 hour to obtain pretreated wool fibers; The soaking solution is prepared by uniformly mixing 5 kg hydrogen peroxide, 9 kg succinic acid, 3 kg ammonium polyphosphate, 13 kg chitosan, 30 kg waterborne polyurethane, and 9 kg polyethylene glycol.

[0063] Examples 1-5 provide a PET napped recyclable yarn.

[0064] Example 1 A type of PET napped recyclable yarn is produced by the following method: First, modified polyester fiber and wool fiber are blended at a weight ratio of 70 / 30, and then the napping process is carried out using a speed-increasing roller group with a speed-increasing ratio of 1.2 to obtain PET napped recyclable yarn. Among them, the modified polyester fiber is preparation example 6; the wool fiber is preparation example 11.

[0065] Example 2 A type of PET napped recyclable yarn is produced by the following method: First, modified polyester fiber and wool fiber are blended at a blending weight ratio of 75 / 25, and then the napping process is carried out using a speed-increasing roller group with a speed-increasing ratio of 1.3 to obtain PET napped recyclable yarn. Among them, the modified polyester fiber is preparation example 7; the wool fiber is preparation example 12.

[0066] Example 3 A type of PET napped recyclable yarn is produced by the following method: First, modified polyester fiber and wool fiber are blended at a weight ratio of 80 / 20, and then the napping process is carried out using a speed-increasing roller group with a speed-increasing ratio of 1.4 to obtain PET napped recyclable yarn. Among them, the modified polyester fiber is preparation example 8; the wool fiber is preparation example 13.

[0067] Example 4 A type of PET napped recyclable yarn is produced by the following method: First, modified polyester fiber and wool fiber are blended at a blending weight ratio of 85 / 15, and then the napping process is carried out using a speed-increasing roller group with a speed-increasing ratio of 1.5 to obtain PET napped recyclable yarn. Among them, the modified polyester fiber is preparation example 9; the wool fiber is preparation example 14.

[0068] Example 5 A type of PET napped recyclable yarn is produced by the following method: First, modified polyester fiber and wool fiber are blended at a weight ratio of 90 / 10, and then the napping process is carried out using a speed-increasing roller group with a speed-increasing ratio of 1.2-1.6 to obtain PET napped recyclable yarn. Among them, the modified polyester fiber is Preparation Example 10; the wool fiber is Preparation Example 15.

[0069] Examples 6-10 provide a car carpet.

[0070] Example 6 A car carpet is produced by the following method: S1. Preparation of the blanket surface layer: Twist the recycled PET napped yarn into 65 / 2 yarn as warp and weft yarns, and weave it into a greige fabric; the greige fabric is then shaped, ironed and cut to obtain the blanket surface layer; The PET napped recyclable yarn was obtained from Example 1; S2. Preparation of automotive carpet: The carpet surface layer, anti-slip layer and antibacterial layer are bonded in sequence with an adhesive to obtain the initial product; then the initial product is hot-pressed at a temperature of 140℃ to obtain the automotive carpet.

[0071] Example 7 A car carpet is produced by the following method: S1. Preparation of the blanket surface layer: Twist the PET napped recyclable yarn into 70 / 2 yarn as warp and weft yarns, and weave it into a greige fabric; the greige fabric is then shaped, ironed and cut to obtain the blanket surface layer; The PET napped recyclable yarn was obtained from Example 2; S2. Preparation of automotive carpet: The carpet surface layer, anti-slip layer and antibacterial layer are bonded in sequence with an adhesive to obtain the initial product; then the initial product is hot-pressed at a temperature of 145℃ to obtain the automotive carpet.

[0072] Example 8 A car carpet is produced by the following method: S1. Preparation of the blanket surface layer: Twist the PET napped recyclable yarn into 70 / 2 yarn as warp and weft yarns, and weave it into a greige fabric; the greige fabric is then shaped, ironed and cut to obtain the blanket surface layer; The PET napped recyclable yarn was obtained from Example 3; S2. Preparation of automotive carpet: The carpet surface layer, anti-slip layer and antibacterial layer are bonded in sequence with an adhesive to obtain the initial product; then the initial product is hot-pressed at a temperature of 150℃ to obtain the automotive carpet.

[0073] Example 9 A car carpet is produced by the following method: S1. Preparation of the blanket surface layer: Twist the recycled PET napped yarn into 75 / 2 yarn as warp and weft yarns, and weave it into a greige fabric; the greige fabric is then shaped, ironed and cut to obtain the blanket surface layer; The PET napped recyclable yarn was obtained from Example 4; S2. Preparation of automotive carpet: The carpet surface layer, anti-slip layer and antibacterial layer are bonded in sequence with an adhesive to obtain the initial product; then the initial product is hot-pressed at a temperature of 155℃ to obtain the automotive carpet.

[0074] Example 10 A car carpet is produced by the following method: S1. Preparation of the blanket surface layer: Twist the recycled PET napped yarn into 75 / 2 yarn as warp and weft yarns, and weave it into a greige fabric; the greige fabric is then shaped, ironed and cut to obtain the blanket surface layer; The PET napped recyclable yarn was obtained from Example 5; S2. Preparation of automotive carpet: The carpet surface layer, anti-slip layer and antibacterial layer are bonded in sequence with an adhesive to obtain the initial product; then the initial product is hot-pressed at a temperature of 160℃ to obtain the automotive carpet.

[0075] To verify the performance of the PET napped recyclable yarn provided in this application, the applicant set up comparative examples 1-7, wherein: Comparative Example 1 Comparative Example 1 is the same as Example 1, except that the modified polyester fiber is the comparative preparation example 3.

[0076] Comparative Example 2 Comparative Example 2 is the same as Example 1, except that the modified polyester fiber is the same as that in Comparative Preparation Example 4.

[0077] Comparative Example 3 Comparative Example 3 is the same as Example 1, except that the modified polyester fiber is the same as that in Comparative Preparation Example 5.

[0078] Comparative Example 4 Comparative Example 4 is the same as Example 1, except that the modified polyester fiber is the same as that used in Comparative Preparation Example 6.

[0079] Comparative Example 5 Comparative Example 5 is the same as Example 1, except that the modified polyester fiber is the same as that in Comparative Preparation Example 7.

[0080] Comparative Example 6 Comparative Example 6 is the same as Example 1, except that the modified polyester fiber is replaced with polyester fiber.

[0081] Comparative Example 7 Comparative Example 7 is the same as Example 1, except that the wool fibers are not pretreated.

[0082] The main properties of the PET napped recyclable yarns obtained in Examples 1-5 and Comparative Examples 1-7 were tested respectively, and the following results were obtained, as shown in Table 1: The tensile breaking properties of PET napped recyclable yarn were tested in accordance with GB / T3916-2013 "Determination of breaking strength and elongation at break of single yarn in packaged textiles". The limiting oxygen index of PET napped recyclable yarn was tested in accordance with GB / T 5454-1997 "Test for flammability of textiles - Oxygen Index Method". The flame retardant performance rating of PET napped recyclable yarn was tested according to GB / T 5455-1997 "Vertical Method for Testing the Burning Performance of Textiles". The abrasion resistance of PET napped recyclable yarn was tested according to ASTM D6611-16, "Standard Test Method for Wet Yarn and Yarn Abrasion Resistance".

[0083] Table 1: Example 1 3.65 30.4 V-0 0.25 Example 2 4.18 32.9 V-0 0.21 Example 3 4.65 36.8 V-0 0.18 Example 4 5.01 35.4 V-0 0.16 Example 5 4.89 34.3 V-0 0.12 Comparative Example 1 2.48 28.1 V-0 2.53 Comparative Example 2 2.69 27.8 V-0 1.22 Comparative Example 3 3.15 22.3 V-2 1.93 Comparative Example 4 3.32 25.5 V-1 0.56 Comparative Example 5 3.24 24.9 V-1 0.67 Comparative Example 6 2.03 20.9 V-2 4.35 Comparative Example 7 3.25 25.4 V-1 1.33 As shown in Table 1 above, the comprehensive performance of the PET napped recyclable yarn obtained in Examples 1-5 of this application is far superior to that of the PET napped recyclable yarn obtained in Comparative Examples 1-7. It has significant flame retardant properties, excellent mechanical properties, high abrasion resistance, and is recyclable, which is of significance for sustainable development. The PET napped recyclable yarn of this application can be used as a raw material for the carpet surface layer of automotive carpets, so that automotive carpets have good abrasion resistance and aging resistance, and can also be flame retardant, antibacterial, waterproof and breathable.

[0084] As can be seen from Example 1 and Comparative Examples 1-3, the modified polyester fiber in Example 1 was prepared by Preparation Example 6. The raw materials of the modified polyester fiber include nano-silica, hemp stalk core ultrafine powder, and flame retardant. Compared with Comparative Examples 1-3, the PET napped recyclable yarn obtained in Example 1 is superior to Comparative Examples 1-3 in terms of mechanical properties, flame retardant properties, and abrasion resistance.

[0085] As can be seen from Example 1 and Comparative Examples 4 and 5, the modified polyester fiber in Example 1 was prepared by Preparation Example 6, and the flame retardant in the modified polyester fiber was an aminosulfonic acid-attapulgite composite, which was prepared by Preparation Example 1. Compared with Comparative Examples 4 and 5, the flame retardant properties of the PET napped recyclable yarn obtained in Example 1 were significantly enhanced, and it also had excellent mechanical properties and abrasion resistance. It can be recycled and reused, which is of significance for sustainable development.

[0086] As can be seen from Example 1 and Comparative Example 6, the PET napped recyclable yarn in Example 1 includes modified polyester fiber, and the modified polyester fiber is prepared by Preparation Example 6. Compared with Comparative Example 6 which uses unmodified polyester fiber, the overall performance of the PET napped recyclable yarn obtained in Example 1 is superior.

[0087] As can be seen from Example 1 and Comparative Example 7, the PET napped recyclable yarn in Example 1 includes pretreated wool fibers, and the wool fibers are pretreated in the manner of Preparation Example 11. Compared with Comparative Example 7, which uses untreated wool fibers, the PET napped recyclable yarn obtained in Example 1 has better mechanical properties, flame retardant properties and abrasion resistance.

[0088] 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 PET napped recyclable yarn, characterized in that, Composed of modified polyester fibers and wool fibers; The modified polyester fiber has a fineness of 8-10µm; the wool fiber has a fineness of 17.5-35.5µm. The modified polyester fiber comprises the following raw materials in parts by weight: 60-80 parts PET chips, 10-15 parts flame retardant, 8-9 parts hemp stalk core ultrafine powder, 5-10 parts nano silica, and 1-3 parts lubricant. The flame retardant comprises the following raw materials in parts by weight: 6-12 parts guanidine aminosulfonate, 4-8 parts iminodisuccinic acid, 1-2 parts carbodiimide, 15-17 parts attapulgite, 10-30 parts ethanol, and 5-10 parts water. The modified polyester fiber is obtained by the following method: First, PET chips, flame retardant, hemp stalk core ultrafine powder, nano silica, and lubricant are mixed at a speed of 1000-1500 r / min for 10-20 min to obtain a premix; then, the premix is ​​melt-spun to obtain modified polyester fiber.

2. The PET napped recyclable yarn according to claim 1, characterized in that, The flame retardant is prepared by the following method: Attapulgite is calcined in a muffle furnace at 260-350℃ for 1-1.5 hours to obtain pretreated attapulgite. Iminodisuccinic acid and carbodiimide were added to water and activated for 30-50 minutes. Guanidine aminosulfonate was added and the reaction was continued at 6-10℃ for 6-8 hours to obtain modified guanidine aminosulfonate. Pretreated attapulgite clay was added to modified guanidine aminosulfonate, and the pH was adjusted to 3-5. The mixture was reacted at a speed of 400-500 r / min and a temperature of 30-40℃ for 30-50 min. Finally, the mixture was precipitated with ethanol, washed, and filtered to obtain the flame retardant.

3. The PET napped recyclable yarn according to claim 1, characterized in that, The wool fibers are also pretreated, as follows: Wool fibers are added to the soaking solution and soaked for 40-60 minutes. Then they are placed in an oven and dried at 40-50℃ for 1-2 hours to obtain pretreated wool fibers.

4. The PET napped recyclable yarn according to claim 3, characterized in that, The soaking solution comprises the following raw materials in parts by weight: 1-5 parts hydrogen peroxide, 7-9 parts succinic acid, 2-3 parts ammonium polyphosphate, 10-13 parts chitosan, 20-30 parts waterborne polyurethane, and 7-9 parts polyethylene glycol.

5. The PET napped recyclable yarn according to claim 1, characterized in that, The PET napped recyclable yarn is obtained by the following method: First, modified polyester fiber and wool fiber are blended at a blending weight ratio of (70 / 30)-(90 / 10), and then the napping process is carried out using a speed-increasing roller group with a speed-increasing ratio of 1.2-1.6 to obtain PET napped recyclable yarn.

6. A car carpet, characterized in that, It consists of a carpet layer, an anti-slip layer, and an antibacterial layer, which are bonded together with an adhesive. The carpet surface layer is spun from the PET napped recyclable yarn as described in any one of claims 1-5; the anti-slip layer is a layer structure formed of foam material.

7. The automotive carpet according to claim 6, characterized in that, The automotive carpet is produced by the following method: S1. Preparation of the blanket surface layer: Twist the recycled PET napped yarn into 65 / 2-75 / 2 yarn as warp and weft yarns, and weave it into a greige fabric; the greige fabric is then shaped, ironed and cut to obtain the blanket surface layer; S2. Preparation of automotive carpet: The carpet surface layer, anti-slip layer and antibacterial layer are bonded in sequence with an adhesive to obtain the initial product; then the initial product is hot-pressed at a temperature of 140-160℃ to obtain the automotive carpet.