Preparation method of antibacterial and anti-sticking polystyrene disposable tableware

Abstract

The invention relates to a preparation method of antibacterial and anti-sticking polystyrene disposable tableware, and belongs to the technical field of disposable tableware. The preparation method comprises the following steps: putting polystyrene resin, a nano zinc oxide antibacterial agent, an organic silicon anti-sticking agent, a toughening agent and an antioxidant into a high-speed mixer, and mixing to obtain a premix; putting the premix into a double-screw extruder, melting, shearing, mixing, extruding, and dicing to obtain modified polystyrene particles; and putting the modified polystyrene particles into an injection molding machine, and carrying out injection molding to obtain the antibacterial and anti-sticking polystyrene disposable tableware. The antibacterial agent is prepared from polylysine hydrochloride, rosmarinic acid, absolute ethyl alcohol, citric acid, baking soda and sulfydryl-beta-cyclodextrin; the prepared disposable tableware is high in antibacterial rate on common harmful microorganisms such as escherichia coli and staphylococcus aureus, breeding of microorganisms on the surface of the tableware can be effectively inhibited, and the food pollution risk is reduced; the surface contact angle of the tableware is large, and the tableware is not easy to adhere when containing food containing grease, sauce and the like.

Description

Technical Field

[0001] This invention relates to the field of disposable tableware technology, and in particular to a method for preparing antibacterial and non-stick polystyrene disposable tableware. Background Technology

[0002] Polystyrene has advantages such as high transparency, good rigidity, excellent processing performance and low cost, and is widely used in the production of disposable tableware, such as disposable lunch boxes, spoons and plates, which greatly meets people's needs for convenience in daily life.

[0003] Chinese Patent CN106397844A discloses a disposable tableware, which is made of the following materials by weight percentage: 150-200 parts cassava, 25-50 parts konjac, 22-30 parts corn, 15-30 parts lotus root, 40-50 parts ramie, 20-35 parts guar gum, 10-15 parts sodium alginate, 300-400 parts water, and 50-100 parts ethanol.

[0004] Chinese Patent CN107083081A discloses an environmentally friendly disposable tableware made of plant fiber, comprising the following raw materials in parts by weight: 10-18 parts of rice husk, 15-25 parts of corn stalk, 10-20 parts of dry rice straw, 2-4 parts of starch, 8-14 parts of adhesive, 4-10 parts of processing aid, 2-4 parts of plant protein glue, and 1-3 parts of plant polysaccharides.

[0005] There are two major problems with disposable tableware made with existing technology: First, the antibacterial properties are poor, and harmful microorganisms such as Escherichia coli and Staphylococcus aureus can easily grow on the surface of the tableware. Especially in warm and humid environments, the proliferation of microorganisms can lead to food contamination and endanger human health. Second, the non-stick properties are poor. When food containing oil, sauces or other condiments is placed in the tableware, food can easily stick together, which not only affects the user experience but also causes food waste. Summary of the Invention

[0006] To address the above problems, this invention provides a method for preparing antibacterial and non-stick polystyrene disposable tableware, the operation steps of which are as follows, in parts by weight: S1: Add 70-90 parts of polystyrene resin, 1-5 parts of antibacterial agent, 1-3 parts of silicone anti-sticking agent, 2-6 parts of toughening agent, and 0.1-0.5 parts of antioxidant to a high-speed mixer and mix to obtain a uniform premix. S2: The premixed material is fed into a twin-screw extruder, melted, sheared, and mixed before being extruded. The modified polystyrene particles are obtained by water cooling and pelletizing. S3: Modified polystyrene granules are fed into an injection molding machine, and after injection molding and cooling, antibacterial and non-stick polystyrene disposable tableware is obtained.

[0007] In some embodiments, the polystyrene resin is one of Taiwan Chi Mei GPPS-666H, Zhenjiang Chi Mei GPPS-525, or BASF GPPS158K.

[0008] In some embodiments, the silicone anti-stick agent is one of Dow Corning PMX-200, Wacker AK1000, and Momentive TSF451-500.

[0009] In some implementations, the toughening agent is one of Chi Mei PA-757, Lanxess K-resin 1185, or Sinopec Qilu SBR1502.

[0010] In some embodiments, the antioxidant is one of BASF Irganox 1010, Lyon 1010, BASF Irgafos 168, and Adico 168.

[0011] In some embodiments, the S1 high-speed mixer has a rotation speed of 1000-1500 r / min, a temperature of 40-60℃, and a mixing time of 15-25 min.

[0012] In some embodiments, the S2 twin-screw extruder has an extrusion temperature of 150-195°C and a screw speed of 200-300 r / min.

[0013] In some implementations, the injection temperature of the S3 injection molding machine is 180-200°C, and the injection pressure is 80-120 MPa.

[0014] In some embodiments, the method for preparing the antibacterial agent is as follows: By weight, mix 20-30 parts of food-grade polylysine hydrochloride, 15-25 parts of rosmarinic acid, and 150-240 parts of food-grade anhydrous ethanol, then add 0.5-3 parts of food-grade citric acid, heat to 60-70℃, and react for 3-5 hours; then add baking soda to adjust the pH to 9-11, add 0.05-0.7 parts of mercapto-β-cyclodextrin, and continue the reaction for 30-100 minutes; after the reaction is complete, remove the anhydrous ethanol by vacuum distillation, and dry under vacuum at 50-70℃ for 3-6 hours to obtain the antibacterial agent.

[0015] In some embodiments, the vacuum distillation is performed at a vacuum level of 0.07-0.1 MPa and a temperature of 55-65°C.

[0016] The reaction mechanism of the antibacterial agent is as follows: Rosmarinic acid is rich in carboxyl and hydroxyl active groups. As the core antibacterial active ingredient, its polyphenyl structure can enhance the compatibility of antibacterial ingredients with polystyrene resin. At the same time, it undergoes an amidation reaction with polylysine hydrochloride under the catalysis of citric acid and the dispersion of anhydrous ethanol. Then, mercapto-β-cyclodextrin undergoes a mercaptoolefin addition reaction with carbon-carbon double bonds to form a stable and highly dispersible composite antibacterial system. The organosilicon anti-stick agent forms a smooth and lubricating film on the surface of tableware, which, together with the composite antibacterial system, endows the tableware with strong antibacterial and anti-stick properties.

[0017] Technical effects: The present invention discloses a method for preparing antibacterial and non-stick polystyrene disposable tableware. Compared with the prior art, the present invention has the following significant advantages: 1. The constructed composite antibacterial system can exert a synergistic antibacterial effect, effectively inhibit the growth of common harmful microorganisms, and greatly improve the antibacterial ability of tableware.

[0018] 2. The addition of silicone anti-stick agent optimizes the surface properties of tableware, reduces the sticking of oily and sauce-containing foods, and improves the user experience.

[0019] 3. The antibacterial and anti-stick components work synergistically to achieve a breakthrough in both antibacterial and anti-stick functions while ensuring the original processing performance of the tableware, thus solving the core pain points of traditional tableware. Detailed Implementation

[0020] To further illustrate the technical means and effects of the present invention in achieving the intended purpose, the following detailed description of the specific implementation methods and effects of the present invention, in conjunction with embodiments, is provided below.

[0021] 1. Antibacterial performance testing: The antibacterial properties of plastic surfaces were tested according to GB / T31402-2015 "Test Method for Antibacterial Properties of Plastic Surfaces". The test strains were *Escherichia coli* and *Staphylococcus aureus*. Samples were placed in petri dishes containing bacterial solution and incubated at 37℃ for 24 hours. The number of viable bacteria on the sample surface was then measured, and the antibacterial rate was calculated. Antibacterial rate = (Number of viable bacteria in the blank control group - Number of viable bacteria in the sample group) / Number of viable bacteria in the blank control group × 100%.

[0022] 2. Anti-stick performance test: The contact angle of edible oil on the sample surface is measured using a contact angle meter. The larger the contact angle, the better the anti-stick performance. At the same time, an actual anti-stick test is carried out. Peanut oil at 60℃ is evenly applied to the sample surface. After cooling to room temperature, it is rinsed with water. The oil residue on the sample surface is observed and divided into three levels: no residue, small amount of residue, and large amount of residue. Example

[0023] A method for preparing antibacterial and non-stick polystyrene disposable tableware, comprising the following steps: S1: Add 70g of polystyrene resin, 1g of antibacterial agent, 1g of silicone anti-sticking agent, 2g of toughening agent, and 0.1g of antioxidant to a high-speed mixer and mix to obtain a uniform premix. S2: The premixed material is fed into a twin-screw extruder, melted, sheared, and mixed before being extruded. The modified polystyrene particles are obtained by water cooling and pelletizing. S3: Modified polystyrene granules are fed into an injection molding machine, and after injection molding and cooling, antibacterial and non-stick polystyrene disposable tableware is obtained.

[0024] The polystyrene resin mentioned is Taiwan Chi Mei GPPS-666H.

[0025] The silicone anti-sticking agent mentioned is Dow Corning PMX-200.

[0026] The toughening agent mentioned is Chimei PA-757.

[0027] The antioxidant mentioned is BASF Irganox 1010.

[0028] The S1 high-speed mixer has a rotation speed of 1000 r / min, a temperature of 40℃, and a mixing time of 15 min.

[0029] The S2 twin-screw extruder has an extrusion temperature of 150℃ and a screw speed of 200 r / min.

[0030] The injection temperature of the S3 injection molding machine is 180℃ and the injection pressure is 80MPa.

[0031] The method for preparing the antibacterial agent is as follows: 20g of food-grade polylysine hydrochloride (CAS: 25988-63-0), 15g of rosmarinic acid (CAS: 20283-92-5), and 150g of food-grade anhydrous ethanol were mixed, and 0.5g of food-grade citric acid was added. The mixture was heated to 60℃ and reacted for 3 hours. Baking soda was then added to adjust the pH to 9, and 0.05g of mercapto-β-cyclodextrin was added. The reaction was continued for 30 minutes. After the reaction was completed, the anhydrous ethanol was removed by vacuum distillation, and the mixture was dried under vacuum at 50℃ for 3 hours to obtain the antibacterial agent.

[0032] The vacuum distillation process is carried out at a vacuum level of 0.07 MPa and a temperature of 55°C. Example

[0033] A method for preparing antibacterial and non-stick polystyrene disposable tableware, comprising the following steps: S1: Add 75g of polystyrene resin, 2g of antibacterial agent, 2g of silicone anti-sticking agent, 3g of toughening agent, and 0.2g of antioxidant to a high-speed mixer and mix to obtain a uniform premix. S2: The premixed material is fed into a twin-screw extruder, melted, sheared, and mixed before being extruded. The modified polystyrene particles are obtained by water cooling and pelletizing. S3: Modified polystyrene granules are fed into an injection molding machine, and after injection molding and cooling, antibacterial and non-stick polystyrene disposable tableware is obtained.

[0034] The polystyrene resin mentioned is Zhenjiang Chimei GPPS-525.

[0035] The silicone anti-sticking agent mentioned is Wacker AK1000.

[0036] The toughening agent mentioned is Lanxess K-resin 1185.

[0037] The antioxidant mentioned is Leylan 1010.

[0038] The S1 high-speed mixer has a rotation speed of 1100 r / min, a temperature of 45℃, and a mixing time of 20 min.

[0039] The S2 twin-screw extruder has an extrusion temperature of 165℃ and a screw speed of 250 r / min.

[0040] The injection temperature of the S3 injection molding machine is 185℃ and the injection pressure is 90MPa.

[0041] The method for preparing the antibacterial agent is as follows: 23g of food-grade polylysine hydrochloride (CAS: 25988-63-0), 18g of rosmarinic acid (CAS: 20283-92-5), and 170g of food-grade anhydrous ethanol were mixed, and 1g of food-grade citric acid was added. The mixture was heated to 65℃ and reacted for 4 hours. Baking soda was then added to adjust the pH to 10, and 0.2g of mercapto-β-cyclodextrin was added. The reaction was continued for 50 minutes. After the reaction was completed, the anhydrous ethanol was removed by vacuum distillation, and the mixture was dried under vacuum at 55℃ for 4 hours to obtain the antibacterial agent.

[0042] The vacuum distillation process is carried out at a vacuum level of 0.08 MPa and a temperature of 60°C. Example

[0043] A method for preparing antibacterial and non-stick polystyrene disposable tableware, comprising the following steps: S1: Add 85g of polystyrene resin, 4g of antibacterial agent, 2g of silicone anti-sticking agent, 5g of toughening agent, and 0.4g of antioxidant to a high-speed mixer and mix to obtain a uniform premix. S2: The premixed material is fed into a twin-screw extruder, melted, sheared, and mixed before being extruded. The modified polystyrene particles are obtained by water cooling and pelletizing. S3: Modified polystyrene granules are fed into an injection molding machine, and after injection molding and cooling, antibacterial and non-stick polystyrene disposable tableware is obtained.

[0044] The polystyrene resin mentioned is Zhenjiang Chimei GPPS-525.

[0045] The silicone anti-sticking agent mentioned is Wacker AK1000.

[0046] The toughening agent mentioned is Lanxess K-resin 1185.

[0047] The antioxidant mentioned is BASF Irgafos168.

[0048] The S1 high-speed mixer has a rotation speed of 1400 r / min, a temperature of 55℃, and a mixing time of 20 min.

[0049] The S2 twin-screw extruder has an extrusion temperature of 185℃ and a screw speed of 250 r / min.

[0050] The injection temperature of the S3 injection molding machine is 195℃ and the injection pressure is 110MPa.

[0051] The method for preparing the antibacterial agent is as follows: 28g of food-grade polylysine hydrochloride (CAS: 25988-63-0), 23g of rosmarinic acid (CAS: 20283-92-5), and 220g of food-grade anhydrous ethanol were mixed, and 2g of food-grade citric acid was added. The mixture was heated to 65℃ and reacted for 4 hours. Baking soda was then added to adjust the pH to 10, and 0.6g of mercapto-β-cyclodextrin was added. The reaction was continued for 80 minutes. After the reaction was completed, the anhydrous ethanol was removed by vacuum distillation, and the mixture was dried under vacuum at 65℃ for 5 hours to obtain the antibacterial agent.

[0052] The vacuum distillation process is carried out at a vacuum level of 0.09 MPa and a temperature of 60°C. Example

[0053] A method for preparing antibacterial and non-stick polystyrene disposable tableware, comprising the following steps: S1: Add 90g of polystyrene resin, 5g of antibacterial agent, 3g of silicone anti-sticking agent, 6g of toughening agent, and 0.5g of antioxidant to a high-speed mixer and mix to obtain a uniform premix. S2: The premixed material is fed into a twin-screw extruder, melted, sheared, and mixed before being extruded. The modified polystyrene particles are obtained by water cooling and pelletizing. S3: Modified polystyrene granules are fed into an injection molding machine, and after injection molding and cooling, antibacterial and non-stick polystyrene disposable tableware is obtained.

[0054] The polystyrene resin mentioned is BASF GPPS158K.

[0055] The silicone anti-sticking agent mentioned is Momentive TSF451-500.

[0056] The toughening agent mentioned is Sinopec Qilu SBR1502.

[0057] The antioxidant mentioned is Adico 168.

[0058] The S1 high-speed mixer has a rotation speed of 1500 r / min, a temperature of 60℃, and a mixing time of 25 min.

[0059] The S2 twin-screw extruder has an extrusion temperature of 195℃ and a screw speed of 300 r / min.

[0060] The injection temperature of the S3 injection molding machine is 200℃ and the injection pressure is 120MPa.

[0061] The method for preparing the antibacterial agent is as follows: 30g of food-grade polylysine hydrochloride (CAS: 25988-63-0), 25g of rosmarinic acid (CAS: 20283-92-5), and 240g of food-grade anhydrous ethanol were mixed, and 3g of food-grade citric acid was added. The mixture was heated to 70℃ and reacted for 5 hours. Baking soda was then added to adjust the pH to 11, and 0.7g of mercapto-β-cyclodextrin was added. The reaction was continued for 100 minutes. After the reaction was completed, the anhydrous ethanol was removed by vacuum distillation, and the mixture was dried under vacuum at 70℃ for 6 hours to obtain the antibacterial agent.

[0062] The vacuum distillation process is carried out at a vacuum level of 0.1 MPa and a temperature of 65°C.

[0063] Comparative Example 1 A method for preparing antibacterial and non-stick polystyrene disposable tableware, comprising the following steps: S1: Add 70g of polystyrene resin, 1g of silicone anti-sticking agent, 2g of toughening agent, and 0.1g of antioxidant to a high-speed mixer and mix to obtain a uniform premix. S2: The premixed material is fed into a twin-screw extruder, melted, sheared, and mixed before being extruded. The modified polystyrene particles are obtained by water cooling and pelletizing. S3: Modified polystyrene granules are fed into an injection molding machine, and after injection molding and cooling, antibacterial and non-stick polystyrene disposable tableware is obtained.

[0064] The polystyrene resin mentioned is Taiwan Chi Mei GPPS-666H.

[0065] The silicone anti-sticking agent mentioned is Dow Corning PMX-200.

[0066] The toughening agent mentioned is Chimei PA-757.

[0067] The antioxidant mentioned is BASF Irganox 1010.

[0068] The S1 high-speed mixer has a rotation speed of 1000 r / min, a temperature of 40℃, and a mixing time of 15 min.

[0069] The S2 twin-screw extruder has an extrusion temperature of 150℃ and a screw speed of 200 r / min.

[0070] The injection temperature of the S3 injection molding machine is 180℃ and the injection pressure is 80MPa.

[0071] Comparative Example 2 A method for preparing antibacterial and non-stick polystyrene disposable tableware, comprising the following steps: S1: Add 70g of polystyrene resin, 1g of antibacterial agent, 1g of silicone anti-sticking agent, 2g of toughening agent, and 0.1g of antioxidant to a high-speed mixer and mix to obtain a uniform premix. S2: The premixed material is fed into a twin-screw extruder, melted, sheared, and mixed before being extruded. The modified polystyrene particles are obtained by water cooling and pelletizing. S3: Modified polystyrene granules are fed into an injection molding machine, and after injection molding and cooling, antibacterial and non-stick polystyrene disposable tableware is obtained.

[0072] The polystyrene resin mentioned is Taiwan Chi Mei GPPS-666H.

[0073] The silicone anti-sticking agent mentioned is Dow Corning PMX-200.

[0074] The toughening agent mentioned is Chimei PA-757.

[0075] The antioxidant mentioned is BASF Irganox 1010.

[0076] The S1 high-speed mixer has a rotation speed of 1000 r / min, a temperature of 40℃, and a mixing time of 15 min.

[0077] The S2 twin-screw extruder has an extrusion temperature of 150℃ and a screw speed of 200 r / min.

[0078] The injection temperature of the S3 injection molding machine is 180℃ and the injection pressure is 80MPa.

[0079] The method for preparing the antibacterial agent is as follows: 20g of food-grade polylysine hydrochloride (CAS: 25988-63-0), 15g of rosmarinic acid (CAS: 20283-92-5), and 150g of food-grade anhydrous ethanol were mixed, and 0.5g of food-grade citric acid was added. The mixture was heated to 60℃ and reacted for 3 hours. Baking soda was then added to adjust the pH to 9. The anhydrous ethanol was removed by vacuum distillation, and the mixture was dried under vacuum at 50℃ for 3 hours to obtain the antibacterial agent.

[0080] The vacuum distillation process is carried out at a vacuum level of 0.07 MPa and a temperature of 55°C.

[0081] Comparative Example 3 A method for preparing antibacterial and non-stick polystyrene disposable tableware, comprising the following steps: S1: Add 70g of polystyrene resin, 1g of antibacterial agent, 1g of silicone anti-sticking agent, 2g of toughening agent, and 0.1g of antioxidant to a high-speed mixer and mix to obtain a uniform premix. S2: The premixed material is fed into a twin-screw extruder, melted, sheared, and mixed before being extruded. The modified polystyrene particles are obtained by water cooling and pelletizing. S3: Modified polystyrene granules are fed into an injection molding machine, and after injection molding and cooling, antibacterial and non-stick polystyrene disposable tableware is obtained.

[0082] The polystyrene resin mentioned is Taiwan Chi Mei GPPS-666H.

[0083] The silicone anti-sticking agent mentioned is Dow Corning PMX-200.

[0084] The toughening agent mentioned is Chimei PA-757.

[0085] The antioxidant mentioned is BASF Irganox 1010.

[0086] The S1 high-speed mixer has a rotation speed of 1000 r / min, a temperature of 40℃, and a mixing time of 15 min.

[0087] The S2 twin-screw extruder has an extrusion temperature of 150℃ and a screw speed of 200 r / min.

[0088] The injection temperature of the S3 injection molding machine is 180℃ and the injection pressure is 80MPa.

[0089] The method for preparing the antibacterial agent is as follows: 20g of food-grade polylysine hydrochloride (CAS: 25988-63-0) and 150g of food-grade anhydrous ethanol were mixed, and 0.5g of food-grade citric acid was added. The mixture was heated to 60℃ and reacted for 3 hours. Baking soda was then added to adjust the pH to 9, and 0.05g of mercapto-β-cyclodextrin was added. The reaction was continued for 30 minutes. After the reaction was completed, the anhydrous ethanol was removed by vacuum distillation, and the mixture was dried under vacuum at 50℃ for 3 hours to obtain the antibacterial agent.

[0090] The vacuum distillation process is carried out at a vacuum level of 0.07 MPa and a temperature of 55°C.

[0091] Table 1. Results of Escherichia coli antibacterial rate, Staphylococcus aureus antibacterial rate, edible oil contact angle, and oil residue on disposable tableware in the examples and comparative examples. Antibacterial rate of Escherichia coli (%) Antibacterial rate against Staphylococcus aureus (%) Edible oil contact angle (°) Oil residue Example 1 99.76 99.68 106 No residue Example 2 99.79 99.70 107 No residue Example 3 99.84 99.74 109 No residue Example 4 99.87 99.76 110 No residue Comparative Example 1 81.36 79.81 72 Large amount of residue Comparative Example 2 94.82 94.13 97 Small amount of residue Comparative Example 3 95.68 94.96 100 Small amount of residue The tableware prepared in this example showed significantly better performance than the comparative example in three core indicators: antibacterial rate against Escherichia coli, antibacterial rate against Staphylococcus aureus, and contact angle with edible oil. Furthermore, no oil residue was observed. The test results indicate that the disposable tableware prepared in this example significantly outperforms the comparative example in core performance indicators. The innovation of this invention lies in constructing a novel composite antibacterial system through amidation and thiol-olefin addition reactions, which significantly enhances antibacterial efficacy. Simultaneously, the combination with an organosilicon anti-stick agent gives the tableware excellent anti-stick properties, overcoming the weakness of traditional tableware's antibacterial properties and improving food adhesion. This achieves dual optimization of antibacterial and anti-stick functions, resulting in overall performance that better meets practical usage needs.

[0092] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A method for preparing antibacterial and non-stick polystyrene disposable tableware, the operation steps of which are as follows, according to parts by weight: S1: Add 70-90 parts of polystyrene resin, 1-5 parts of antibacterial agent, 1-3 parts of silicone anti-sticking agent, 2-6 parts of toughening agent, and 0.1-0.5 parts of antioxidant to a high-speed mixer and mix to obtain a uniform premix. S2: The premixed material is fed into a twin-screw extruder, melted, sheared, and mixed before being extruded. The modified polystyrene particles are obtained by water cooling and pelletizing. S3: Modified polystyrene granules are fed into an injection molding machine, and after injection molding and cooling, antibacterial and non-stick polystyrene disposable tableware is obtained. The antibacterial agent is prepared by reacting food-grade polylysine hydrochloride, rosmarinic acid, food-grade citric acid, sodium bicarbonate, and mercapto-β-cyclodextrin.

2. The method for preparing an antibacterial and non-stick polystyrene disposable tableware according to claim 1, characterized in that: The polystyrene resin mentioned is one of Taiwan Chi Mei GPPS-666H, Zhenjiang Chi Mei GPPS-525, or BASF GPPS158K.

3. The method for preparing an antibacterial and non-stick polystyrene disposable tableware according to claim 1, characterized in that: The aforementioned silicone anti-sticking agent is one of Dow Corning PMX-200, Wacker AK1000, or Momentive TSF451-500.

4. The method for preparing an antibacterial and non-stick polystyrene disposable tableware according to claim 1, characterized in that: The toughening agent is one of Chimei PA-757, Lanxess K-resin 1185, or Sinopec Qilu SBR1502.

5. The method for preparing an antibacterial and non-stick polystyrene disposable tableware according to claim 1, characterized in that: The antioxidant mentioned is one of BASF Irganox 1010, Leylon 1010, BASF Irgafos 168, and Adico 168.

6. The method for preparing an antibacterial and non-stick polystyrene disposable tableware according to claim 1, characterized in that: The S1 high-speed mixer has a rotation speed of 1000-1500 r / min, a temperature of 40-60℃, and a mixing time of 15-25 min.

7. The method for preparing an antibacterial and non-stick polystyrene disposable tableware according to claim 1, characterized in that: The extrusion temperature of the S2 twin-screw extruder is 150-195℃, and the screw speed is 200-300 r / min.

8. The method for preparing an antibacterial and non-stick polystyrene disposable tableware according to claim 1, characterized in that: The injection temperature of the S3 injection molding machine is 180-200℃, and the injection pressure is 80-120MPa.

9. The method for preparing an antibacterial and non-stick polystyrene disposable tableware according to claim 1, characterized in that: The method for preparing the antibacterial agent is as follows: By weight, mix 20-30 parts of food-grade polylysine hydrochloride, 15-25 parts of rosmarinic acid, and 150-240 parts of food-grade anhydrous ethanol, then add 0.5-3 parts of food-grade citric acid, heat to 60-70℃, and react for 3-5 hours; then add baking soda to adjust the pH to 9-11, add 0.05-0.7 parts of mercapto-β-cyclodextrin, and continue the reaction for 30-100 minutes; after the reaction is complete, remove the anhydrous ethanol by vacuum distillation, and dry under vacuum at 50-70℃ for 3-6 hours to obtain the antibacterial agent.

10. A method for preparing an antibacterial and non-stick polystyrene disposable tableware according to claim 9, characterized in that: The vacuum distillation process is carried out at a vacuum level of 0.07-0.1 MPa and a temperature of 55-65℃.