A recycled PP lunchbox material for carpet fibers and its preparation method

Abstract

This application relates to the field of PP recycled food container material for carpet fibers and its preparation method. The raw materials consist of the following parts by weight: 100 parts PP recycled food container material, 1-5 parts lubricant, 1-10 parts plasticizer, 0.2-2 parts anti-aging agent, and 10-30 parts modifier. The modifier is composed of toughening compatibilizer, nano-whiskers, and silicone masterbatch in a weight ratio of 1:(2.25-3):(0.4-1). Through the compounding of toughening compatibilizer, nano-whiskers, and silicone masterbatch, the resulting modifier possesses both good toughening and stain resistance. When blended and modified with PP recycled food container material, and with the assistance of plasticizer, anti-aging agent, and lubricant, the resulting PP recycled food container material, when spun into carpet fibers, exhibits better stain resistance, flexibility, and elasticity, reducing the likelihood of wear and stains on the produced carpets, and improving the carpet's durability and stain resistance.

Description

Technical Field

[0001] This application relates to the field of recycled material modification, and more specifically, it relates to a recycled PP lunchbox material for carpet fibers and a method for preparing the same. Background Technology

[0002] PP (polypropylene) is commonly used in the production of disposable lunch boxes due to its advantages such as being non-toxic, odorless, heat-resistant, impact-resistant, and easy to process. With the rapid development of the fast food industry and the increasing number of pre-prepared meals and catering establishments, the demand for disposable lunch boxes has also increased. Consequently, a large number of discarded PP lunch boxes are generated. Most of these boxes are often incinerated as waste, which can easily impact the environment. A small portion of PP lunch boxes are recycled and reused.

[0003] Carpet fiber is the main raw material used to produce carpets. Carpets made from PP carpet fiber have advantages such as good abrasion resistance, elasticity, easy cleaning, and low water absorption, and are commonly used in automobiles, residences, offices, and commercial spaces. However, the physical properties of materials recycled from PP lunch boxes are reduced, thus limiting the application range of recycled PP lunch box materials.

[0004] Currently, some researchers use recycled PP lunch boxes to blend and modify the materials, adding PA, PET, and glass fiber. While this can further improve the physical properties of the recycled PP lunch boxes, the carpet fibers obtained from these recycled PP lunch boxes, after being spun and processed, still exhibit issues such as easy wear and dirt buildup during use, reducing the carpet's durability. Therefore, further research is needed. Summary of the Invention

[0005] To address the technical problems of carpets being easily damaged and stained, this application provides a PP food container recycling material for carpet fibers and its preparation method.

[0006] In a first aspect, this application provides a recycled PP food container material for carpet fibers, comprising the following raw material components by weight:

[0007] 100 portions of recycled PP lunch boxes

[0008] 1-5 parts lubricant

[0009] 1-10 parts plasticizer

[0010] Anti-aging agent 0.2-2 parts

[0011] 10-30 parts of modifier;

[0012] The modifier is composed of toughening compatibilizer, nano whiskers, and silicone masterbatch in a weight ratio of 1:(2.25-3):(0.4-1).

[0013] In the above scheme, the toughening compatibilizer not only has a toughening effect, but also further improves the compatibility of nano whiskers and silicone masterbatch in the raw material system of PP lunch box recycling, so that the obtained PP lunch box recycling has better stain resistance and toughness, and the carpet fibers made from PP lunch box recycling have better elasticity, wear resistance and stain resistance.

[0014] The use of nano-whiskers and silicone masterbatch, both of which possess excellent toughening and stain resistance, interacts with toughening compatibilizers to further enhance the flexibility, abrasion resistance, and stain resistance of recycled PP lunchbox materials. This results in carpet fibers spun from the recycled PP lunchbox materials, providing superior cushioning, softness, comfort, and stain resistance in carpet production. Long-term walking on the carpet surface reduces wear and tear, while also minimizing dirt accumulation, further improving the carpet's durability and stain resistance.

[0015] Because the PP food container recycled material obtained in this application has better softness, stain resistance, abrasion resistance and elongation than the PP food container recycled material modified by blending PA, PET and glass fiber, the carpet made from it is easy to clean and easy to process and install.

[0016] The PP lunch box recycled material in this application is obtained by recycling, cleaning, drying, crushing and other recycling processes from waste PP lunch boxes.

[0017] In summary, the modifier obtained by compounding toughening compatibilizer, nano whiskers, and silicone masterbatch has both good toughening and stain resistance effects. When blended with recycled PP lunch boxes and modified with the assistance of plasticizers, anti-aging agents, and lubricants, the carpet fibers produced from recycled PP lunch boxes have better stain resistance, flexibility, and elasticity, reducing the possibility of wear and stains on the produced carpets and improving the carpet's durability and stain resistance.

[0018] Preferably, the nano whiskers are composed of one or more of mullite whiskers, aluminum borate whiskers, and SiC whiskers.

[0019] Using mullite whiskers, aluminum borate whiskers, and SiC whiskers can all be combined with silicone masterbatch and toughening compatibilizers to give PP lunch box recycled materials better toughness, elasticity, and stain resistance, resulting in carpets made from the resulting carpet fibers with better abrasion resistance and stain resistance.

[0020] Specifically, mullite whiskers and aluminum borate whiskers have high strength and elongation, giving carpet fibers both good flexibility and abrasion resistance. They also have low surface energy and low water absorption, reducing the adsorption of dirt and moisture and improving the carpet's stain resistance.

[0021] SiC whiskers have better strength and wear resistance, which can further improve the wear resistance and strength of carpet fibers.

[0022] When this application uses mullite whiskers, aluminum borate whiskers, and SiC whiskers in a weight ratio of (1-3):(1.2-1.8):1, it achieves a better effect and a better synergistic effect. Combined with a toughening compatibilizer, the resulting recycled PP lunch box material can be used in carpet fibers to achieve better toughening, wear resistance, and stain resistance, resulting in carpets with better wear resistance and stain resistance.

[0023] Preferably, the toughening compatibilizer is a maleic anhydride compatibilizer and / or a silane-based antifouling compatibilizer.

[0024] The use of maleic anhydride compatibilizers and / or silane anti-fouling compatibilizers both achieve compatibility and toughening effects. Combined with nano whiskers and silicone masterbatch, they have a better synergistic effect on recycled PP lunch boxes, resulting in carpets with better wear resistance and stain resistance.

[0025] Preferably, the maleic anhydride compatibilizer is maleic anhydride-grafted POE and / or vinyl chloride-vinyl acetate-maleic anhydride terpolymer resin.

[0026] Maleic anhydride-grafted POE and / or vinyl chloride-vinyl acetate-maleic anhydride ternary copolymer resin promote the dispersion of nano-whiskers and silicone masterbatches, and improve the compatibility of nano-whiskers and silicone masterbatches in the raw material system of PP recycled food containers. As a result, the PP recycled food container material has better toughness and elongation, thereby improving the toughness and elasticity of carpet fibers obtained from the PP recycled food container material, and thus improving the abrasion resistance and stain resistance of the carpet.

[0027] Preferably, the silane antifouling compatibilizer is composed of 2-isopropyl-2-adamantyl methacrylate, tetraethylene glycol di-2-methacrylate, long-chain alkyl acrylate, etc.

[0028] It is prepared from silyl acrylate monomer, initiator, and solvent.

[0029] Preferably, the modifier is prepared by the following method:

[0030] Weigh out 0.1-0.5 parts of 2-isopropyl-2-adamantyl methacrylate, 0.2-0.8 parts of tetraethylene glycol di-2-methacrylate, 0.1-0.5 parts of long-chain alkyl acrylate, 1.1-1.7 parts of silane acrylate monomer, 0.01-0.03 parts of initiator, and 1-3 parts of solvent by weight, mix them evenly, heat to 62-75℃, react for 2-3 hours, neutralize, and obtain silane antifouling compatibilizer. Then add maleic anhydride compatibilizer and silane antifouling compatibilizer, stir evenly, then add nano whiskers and silicone masterbatch, stir evenly, remove solvent under reduced pressure, cool, and obtain modifier.

[0031] By using 2-isopropyl-2-adamantyl methyl propylene, tetraethylene glycol di-2-methacrylate, long-chain alkyl acrylate, and silane acrylate monomers for compound copolymerization, a silane-based stain-resistant compatibilizer with good compatibility, toughening, and stain resistance is obtained. When combined with maleic anhydride compatibilizers, it exhibits a better synergistic effect. Furthermore, by combining it with nano whiskers and silicone masterbatch, the resulting modifier can be fully compatible with recycled PP lunch boxes and other materials, and also exhibits a better synergistic effect. This results in carpet fibers with better toughness, elasticity, and stain resistance. When applied to carpets, it provides better abrasion resistance and stain resistance, improving the carpet's durability.

[0032] Preferably, the long-chain alkyl acrylate is myristyl acrylate and / or oleomethyl methacrylate.

[0033] The silane antifouling compatibilizer obtained by copolymerizing myristyl acrylate and / or oil-based methacrylate with 2-isopropyl-2-adamantyl methacrylate, tetraethylene glycol di-2-methacrylate and alkyl acrylate monomers has good compatibilization and toughening effect. When combined with nano whiskers and silicone masterbatch, it further improves the toughness and elongation of recycled PP lunch box materials.

[0034] Preferably, the silyl acrylate monomer is 3-(methacryloyloxy)propyltrimethoxysilane and / or 1,3-bis(3-methacryloyloxypropyl)tetra(trimethylsiloxy)disiloxane.

[0035] When 3-(methacryloyloxy)propyltrimethoxysilane and / or 1,3-bis(3-methacryloyloxypropyl)tetra(trimethylsiloxy)disiloxane are used as silane acrylate monomers, the combination with a silane anti-fouling compatibilizer raw material system achieves a better synergistic effect. This results in carpets made from recycled PP lunchbox materials exhibiting superior abrasion resistance and stain resistance.

[0036] Secondly, this application provides a method for preparing recycled PP lunch box materials for carpet fibers, using the following technical solution:

[0037] Weigh out the toughening compatibilizer, nano whiskers, and silicone masterbatch by weight and mix them evenly to obtain the modifier.

[0038] Weigh out the PP lunch box recycled material, lubricant, plasticizer, anti-aging agent and modifier by weight, mix them evenly, extrude, cool, dry and granulate to obtain PP lunch box recycled material.

[0039] In summary, this application has the following beneficial effects:

[0040] 1. By compounding toughening compatibilizer, nano whiskers, and silicone masterbatch, the resulting modifier has both good toughening and stain resistance. When blended with recycled PP lunch boxes and modified with the assistance of plasticizer, anti-aging agent, and lubricant, the carpet fibers produced from recycled PP lunch boxes have better stain resistance, flexibility, and elasticity, reducing the possibility of wear and stains on the produced carpets and improving the carpet's durability and stain resistance.

[0041] 2. By compounding and copolymerizing 2-isopropyl-2-adamantyl methyl propylene, tetraethylene glycol di-2-methacrylate, long-chain alkyl acrylate, and silane acrylate monomers, a silane anti-fouling compatibilizer with good compatibility, toughening, and stain resistance is obtained. When combined with maleic anhydride compatibilizers, it exhibits a better synergistic effect. Furthermore, by combining it with nano whiskers and silicone masterbatch, the resulting modifier can be fully compatible with recycled PP lunch boxes and other materials, and also exhibits a better synergistic effect. This results in carpet fibers with better toughness, elasticity, and stain resistance. When applied to carpets, it provides better abrasion resistance and stain resistance, improving the carpet's durability. Detailed Implementation

[0042] The present application will be further described in detail below with reference to the embodiments.

[0043] Introduction to some materials;

[0044] Table 1: Introduction to Some Materials

[0045]

[0046]

[0047] Example

[0048] Example 1

[0049] A method for preparing recycled PP food container materials for carpet fibers, comprising:

[0050] Weigh 2 kg of toughening compatibilizer (maleic anhydride compatibilizer, specifically maleic anhydride grafted POE), 6 kg of nano whiskers (mullite whiskers), and 2 kg of silicone masterbatch and place them in a heating and stirring device. Heat to 120°C and stir at 150 r / min for 10 min to ensure thorough mixing. Cool to 35°C to obtain the modifier.

[0051] Weigh 100kg of recycled PP lunch box material, 1kg of lubricant, 1kg of plasticizer, 0.2kg of anti-aging agent, and 10kg of modifier and put them into a high-speed mixer. Stir for 10 minutes at a speed of 150r / min. Then transfer to a twin-screw extruder for extrusion and cool to 40℃ in a cooling device. Then dry in a drying device at 100℃ for 30s. Finally, granulate in a granulator to obtain recycled PP lunch box material.

[0052] Table 2 Temperature Settings for Twin-Screw Extruders

[0053]

[0054]

[0055] Example 2

[0056] The difference between Example 2 and Example 1 lies in the dosage, specifically:

[0057] 5kg toughening compatibilizer (maleic anhydride compatibilizer, specifically maleic anhydride grafted POE), 8kg nano whiskers (mullite whiskers), 2kg silicone masterbatch, 100kg recycled PP lunch box material, 3kg lubricant, 5kg plasticizer, and 1kg anti-aging agent.

[0058] Example 3

[0059] The difference between Example 3 and Example 1 lies in the dosage, specifically:

[0060] 8kg toughening compatibilizer (maleic anhydride compatibilizer, specifically maleic anhydride-grafted POE), 18kg nano whiskers (mullite whiskers), 4kg silicone masterbatch, 100kg recycled PP lunch box material, 5kg lubricant, 10kg plasticizer, and 2kg anti-aging agent.

[0061] Example 4

[0062] The difference between Example 4 and Example 2 is that the nano whiskers consist of 4 kg of mullite whiskers and 4 kg of aluminum borate whiskers.

[0063] Example 5

[0064] The difference between Example 5 and Example 2 is that the nano whiskers are composed of 4 kg of aluminum borate whiskers and 4 kg of SiC whiskers.

[0065] Example 6

[0066] The difference between Example 6 and Example 2 is that the nano whiskers consist of 4 kg of mullite whiskers, 3 kg of aluminum borate whiskers, and 1 kg of SiC whiskers.

[0067] Example 7

[0068] The difference between Example 7 and Example 6 is that the maleic anhydride compatibilizer is a vinyl chloride-vinyl acetate-maleic anhydride terpolymer resin.

[0069] Example 8

[0070] The difference between Example 8 and Example 6 is that the maleic anhydride compatibilizer is composed of 3 kg of maleic anhydride-grafted POE and 2 kg of vinyl chloride-vinyl acetate-maleic anhydride terpolymer resin.

[0071] Example 9

[0072] The difference between Example 9 and Example 8 is that the toughening compatibilizer is composed of maleic anhydride-grafted POE, vinyl chloride-vinyl acetate-maleic anhydride ternary copolymer resin, and alkyl antifouling compatibilizer. Furthermore, the preparation process of this modifier is different, as follows: Weigh 0.1 kg of 2-isopropyl-2-adamantyl methacrylate, 0.8 kg of tetraethylene glycol di-2-methacrylate, 0.5 kg of long-chain alkyl acrylate (myristyl acrylate), 1.1 kg of long-chain silane acrylate (3-(methacryloyloxy)propyltrimethoxysilane), and 0.01 kg of initiator (benzoic acid peroxide). In a reactor containing 1 kg of tert-butyl ester and 1 kg of ethyl acetate, the mixture was stirred at 50 r / min for 5 min to ensure thorough mixing. The mixture was then heated to 62°C and reacted with stirring for 2 h. The pH was adjusted to 7 to obtain a silane-based antifouling compatibilizer. Then, 1.5 kg of maleic anhydride-grafted POE and 1 kg of vinyl chloride-vinyl acetate-maleic anhydride terpolymer resin were added to the silane-based antifouling compatibilizer. The mixture was stirred for another 30 min, followed by the addition of 8 kg of nano whiskers and 2 kg of silicone masterbatch. The mixture was stirred until homogeneous, heated to 105°C, and ethyl acetate was removed by vacuum distillation. The mixture was then cooled to 35°C to obtain the modifier.

[0073] Example 10

[0074] The difference between Example 10 and Example 9 is that the amounts of each raw material in this modifier are different; the details are as follows:

[0075] Weigh 0.3 kg of 2-isopropyl-2-adamantyl methacrylate, 0.5 kg of tetraethylene glycol di-2-methacrylate, 0.3 kg of long-chain alkyl acrylate (myristyl acrylate), 1.4 kg of long-chain silane acrylate (3-(methacryloyloxy)propyltrimethoxysilane), 0.02 kg of initiator, and 2 kg of ethyl acetate into a reactor. Stir at 50 r / min for 5 min to ensure thorough mixing. Then heat to 70 °C and react with stirring for 3 h to obtain a silane antifouling compatibilizer. Add 1.5 kg of maleic anhydride-grafted POE and 1 kg of vinyl chloride-vinyl acetate-maleic anhydride terpolymer resin to the silane antifouling compatibilizer and continue stirring for 30 min. Then add 8 kg of nano whiskers and 2 kg of silicone masterbatch, stir evenly, heat to 105 °C, remove ethyl acetate by vacuum distillation, and cool to 35 °C to obtain the modifier.

[0076] Example 11

[0077] The difference between Example 11 and Example 9 is that the amounts of each raw material in this modifier are different; the details are as follows:

[0078] Weigh 0.5 kg of 2-isopropyl-2-adamantyl methacrylate, 0.2 kg of tetraethylene glycol di-2-methacrylate, 0.1 kg of long-chain alkyl acrylate (myristyl acrylate), 1.7 kg of long-chain silane acrylate (3-(methacryloyloxy)propyltrimethoxysilane), 0.03 kg of initiator, and 3 kg of ethyl acetate into a reactor. Stir at 50 r / min for 5 min to ensure thorough mixing. Then heat to 75 °C and react with stirring for 2 h to obtain a silane antifouling compatibilizer. Add 1.5 kg of maleic anhydride-grafted POE and 1 kg of vinyl chloride-vinyl acetate-maleic anhydride terpolymer resin to the silane antifouling compatibilizer and continue stirring for 30 min. Then add 8 kg of nano whiskers and 2 kg of silicone masterbatch, stir evenly, heat to 105 °C, remove ethyl acetate by vacuum distillation, and cool to 35 °C to obtain the modifier.

[0079] Example 12

[0080] The difference between Example 12 and Example 10 is that the long-chain alkyl acrylate is an oil-based methacrylate.

[0081] Example 13

[0082] The difference between Example 13 and Example 10 is that the long-chain alkyl acrylate is composed of 0.2 kg myristyl acrylate and 0.1 kg oleo-based methacrylate.

[0083] Example 14

[0084] The difference between Example 14 and Example 13 is that the long-chain silyl acrylate is 1,3-bis(3-methacryloyloxypropyl)tetra(trimethylsiloxy)disiloxane.

[0085] Example 15

[0086] The difference between Example 15 and Example 13 is that the long-chain silyl acrylate is composed of 1.0 kg of 3-(methacryloyloxy)propyltrimethoxysilane and 0.4 kg of 1,3-bis(3-methacryloyloxypropyl)tetra(trimethylsiloxy)disiloxane.

[0087] Example 16

[0088] The difference between Example 16 and Example 9 is that 2-isopropyl-2-adamantyl methacrylate is replaced in equal amounts with tetraethylene glycol di-2-methacrylate.

[0089] Example 17

[0090] The difference between Example 17 and Example 9 is that tetraethylene glycol di-2-methacrylate is replaced in equal amounts with 2-isopropyl-2-adamantyl methacrylate.

[0091] Example 18

[0092] The difference between Example 18 and Example 9 is that long-chain alkyl acrylates are replaced with silane acrylate monomers in equal amounts.

[0093] Example 19

[0094] The difference between Example 19 and Example 9 is that 2-isopropyl-2-adamantyl methacrylate and tetraethylene glycol di-2-methacrylate are replaced in equal amounts with long-chain alkyl acrylates.

[0095] Comparative Example

[0096] Comparative Example 1

[0097] The difference between Comparative Example 1 and Example 1 is that the modifier was replaced with PET in equal amounts, and the temperature of the third zone of the twin-screw extruder was set to 210°C, the temperature of the fourth zone was set to 235°C, the temperature of the fifth zone was set to 255°C, and the temperature of the sixth zone was set to 225°C, while the other parameters remained unchanged.

[0098] Comparative Example 2

[0099] The difference between Comparative Example 2 and Example 1 is that the modifier was replaced with PA in equal amounts, and the temperature of the third zone of the twin-screw extruder was set to 200°C, the temperature of the fourth zone was set to 215°C, the temperature of the fifth zone was set to 235°C, and the temperature of the sixth zone was set to 205°C, while the other parameters remained unchanged.

[0100] Comparative Example 3

[0101] The difference between Comparative Example 3 and Example 1 is that the nano whiskers and silicone masterbatch are replaced with glass fibers in equal amounts.

[0102] Comparative Example 4

[0103] The difference between Comparative Example 4 and Example 1 is that the toughening compatibilizer was replaced with an equal amount of silicone masterbatch.

[0104] Comparative Example 5

[0105] The difference between Comparative Example 5 and Example 1 is that the nano whiskers were replaced with an equal amount of silicone masterbatch.

[0106] Comparative Example 6

[0107] The difference between Comparative Example 6 and Example 1 is that the silicone masterbatch was replaced with an equal amount of nano whiskers.

[0108] Performance testing

[0109] The PP lunch box recycled materials obtained from Examples 1-19 and Comparative Examples 1-6, as well as the PP lunch box recycled materials, were injection molded into several test samples, and then the following performance tests were performed.

[0110] Detection methods / test methods

[0111] (I) Mechanical Properties

[0112] Notched impact strength: Tested according to ASTM D256-2006;

[0113] Tensile yield elongation: Tested according to ASTM D-638;

[0114] The above experiment was performed 3 times, and the average value was taken, rounded to one decimal place.

[0115] Table 3. Experimental data of Examples 1-19 and Comparative Examples 1-6

[0116]

[0117]

[0118] Combining Example 1 and Comparative Examples 1-3 with Table 2, it can be seen that the notched impact strength and elongation at break of Comparative Examples 1-3 are lower than those of Example 1. This indicates that the modifier composed of toughening compatibilizer, nano whiskers, and silicone masterbatch plays a better role in blending modification, thereby resulting in better impact strength and elongation of the recycled PP lunch box material. The carpet fibers produced from the recycled PP lunch box material have better flexibility and abrasion resistance.

[0119] Combining Example 1 and Comparative Examples 4-6 with Table 2, it can be seen that the notched impact strength and elongation at break of Comparative Examples 4-6 are lower than those of Example 1. This indicates that the combination of toughening compatibilizer, nano whiskers, and silicone masterbatch has a better toughening effect, resulting in better impact strength and elongation of the recycled PP lunch box material. The carpet fibers produced from the recycled PP lunch box material have better flexibility and abrasion resistance.

[0120] Combining Examples 2 and 6 with Table 2, it can be seen that the notched impact strength and elongation at break of Example 2 are lower than those of Example 6. This indicates that the use of mullite whiskers, aluminum borate whiskers, and SiC whiskers has a better synergistic effect, thereby making the carpet fibers produced have better toughness and reducing the possibility of breakage and wear.

[0121] (II) Fouling Resistance Test:

[0122] The recycled PP lunch box materials obtained in Examples 1-19 and Comparative Examples 1-6 were melt-spun using a spinning equipment at a temperature of 230°C to obtain carpet fibers.

[0123] Carpets are made by passing carpet fibers through a textile machine and using carpet weaving technology.

[0124] The specifications include: 3.5 count; 600 twists / meter in the Z direction; pile height 10mm; density 90 knots / foot in both the horizontal and vertical directions; carpet thickness 15mm; technical standards: adopting national standard GB / T15050-94 15; carpet weight 3150g / m²; yarn weight 2100g / m².

[0125] First layer: pure cotton fabric base

[0126] Warp: 10S / 2 cotton yarn, 26 single yarns per inch; Weft: 10S / 2 cotton yarn, 26 single yarns per inch; Weight: 3.3 pounds per yard.

[0127] Two-layer pure cotton mesh fabric with 12S / 1 cotton yarn warp (12 threads per inch) and 10S / 2 cotton yarn weft (5.5 threads per inch); woven with grosgrain; weighs approximately 0.3 pounds per yard.

[0128] The carpet prepared above was tested for stain resistance in accordance with QB / T 2999—2008. The average color difference ΔE between the original test sample and the test sample that has been contaminated was calculated. The color observation was limited to the front of the carpet. The larger the ΔE, the worse the stain resistance.

[0129] The Rongce RC149 carpet abrasion tester was used to test the abrasion resistance of the carpet surface under the pressure of four-legged foot traffic on a treadmill. It conforms to standards such as QBT 2998-2008. The treadmill linear speed was 0.28 m / sec; circumferential speed was 0.336 m / sec; the second stroke duration was approximately 7 minutes; the treadmill diameter was 225 mm; the treadmill width was 55 mm; the treadmill load was 15 kg; and the test slippage was 18%. The test was conducted for 20,000 and 50,000 cycles respectively, and the surface abrasion degree was then observed, categorized as light, moderate, and severe.

[0130] The experimental results are shown in Table 4.

[0131] Table 4. Experimental data of Examples 1-19 and Comparative Examples 1-6

[0132]

[0133]

[0134] Comparing Example 1 and Comparative Examples 1-6, it can be seen that the ΔE of Comparative Examples 1-6 is larger than that of Example 1, and after wear testing, the wear degree of Comparative Examples 1-6 is more severe than that of Example 1. This indicates that the modifier obtained by combining toughening compatibilizer, nano whiskers and silicone masterbatch has better wear resistance and stain resistance, thus reducing the possibility of carpet wear.

[0135] Comparing Examples 8 and 9, it can be seen that the ΔE of Example 9 is smaller than that of Example 1, and the wear degree of Example 9 is better than that of Example 8. This indicates that the silane anti-fouling compatibilizer prepared by using 2-isopropyl-2-adamantyl methacrylate, tetraethylene glycol di-2-methacrylate, long-chain alkyl acrylate, silane acrylate monomer, initiator, and solvent, combined with maleic anhydride compatibilizer, gives the toughening compatibilizer better toughening and anti-fouling effects. When combined with nano whiskers and silicone masterbatch, the resulting modifier is used to modify PP lunch box recycled material, achieving better toughening and anti-fouling effects. This reduces the possibility of wear and staining after the carpet fibers are used to produce carpets, improving the durability and practicality of the carpets.

[0136] 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 recycled PP lunchbox material for carpet fibers, characterized in that, The raw materials consist of the following parts by weight: 100 portions of recycled PP lunch boxes 1-5 parts lubricant 1-10 parts plasticizer Anti-aging agent 0.2-2 parts 10-30 parts of modifier; The modifier is composed of toughening compatibilizer, nano whiskers, and silicone masterbatch in a weight ratio of 1:(2.25-3):(0.4-1); The nano whiskers are composed of one or more of mullite whiskers, aluminum borate whiskers, and SiC whiskers. The toughening compatibilizer is a maleic anhydride compatibilizer and / or a silane antifouling compatibilizer; The maleic anhydride compatibilizer is maleic anhydride-grafted POE and / or vinyl chloride-vinyl acetate-maleic anhydride terpolymer resin. The silane antifouling compatibilizer is prepared from 2-isopropyl-2-adamantyl methacrylate, tetraethylene glycol di-2-methacrylate, long-chain alkyl acrylate, silane acrylate monomer, initiator, and solvent. The long-chain alkyl acrylate is myristyl acrylate and / or oleomethyl methacrylate; The silyl acrylate monomer is 3-(methacryloyloxy)propyltrimethoxysilane and / or 1,3-bis(3-methacryloyloxypropyl)tetra(trimethylsiloxy)disiloxane; The modifier is prepared by the following method: Weigh out 0.1-0.5 parts of 2-isopropyl-2-adamantyl methacrylate, 0.2-0.8 parts of tetraethylene glycol di-2-methacrylate, 0.1-0.5 parts of long-chain alkyl acrylate, 1.1-1.7 parts of silyl acrylate monomer, 0.01-0.03 parts of initiator, and 1-3 parts of solvent by weight, mix them evenly, heat to 62-75℃, react for 2-3 hours, neutralize, and obtain silyl antifouling compatibilizer; Then add maleic anhydride compatibilizer and silane antifouling compatibilizer and stir evenly. Then add nano whiskers and silicone masterbatch and continue stirring evenly. Remove the solvent under reduced pressure and cool to obtain the modifier.

2. The PP lunchbox recycling material for carpet fibers according to claim 1, characterized in that: The plasticizer is an environmentally friendly plasticizer, and the anti-aging agent is one or more of the following: antioxidant 1010, antioxidant 1076, antioxidant 264, antioxidant 2246, antioxidant 168, UV770, UV-P, UV531, and UV-327.

3. A method for preparing recycled PP lunchbox material for carpet fibers as described in claim 1 or 2, characterized in that, Includes the following steps: Weigh out the toughening compatibilizer, nano whiskers, and silicone masterbatch by weight and mix them evenly to obtain the modifier. Weigh out the PP lunch box recycled material, lubricant, plasticizer, anti-aging agent and modifier by weight, mix them evenly, extrude, cool, dry and granulate to obtain PP lunch box recycled material.

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