High-strength antibacterial chopping board and preparation method thereof

Abstract

The invention discloses a high-strength antibacterial chopping board and a preparation method thereof. The high-strength antibacterial chopping board is prepared from the following raw materials in parts by weight: 40-60 parts of PET (Polyethylene Terephthalate), 5-25 parts of silver nanoparticles, 3-10 parts of a nucleating agent and 5-10 parts of an antioxidant. According to the high-strength antibacterial chopping board and the preparation method thereof provided by the invention, the chopping board is prepared by compounding the PET, the silver nanoparticles, the nucleating agent and the antioxidant, has the advantages of high temperature resistance, no water absorption and difficulty in mold breeding, can be subjected to steam disinfection, and is simple in preparation process, wide in raw material source, low in cost and suitable for industrial popularization and application.

Description

Technical Field

[0001] The invention belongs to the technical field of kitchen utensils, and particularly relates to a high-strength antibacterial cutting board and a preparation method thereof. Background Art

[0002] Cutting boards are indispensable tools in the kitchen, which greatly facilitate people to cut fruits, vegetables, meat, etc. Common cutting boards include wooden cutting boards, bamboo cutting boards and plastic cutting boards. Cutting boards of different materials have different uses. For example, wooden cutting boards are tough and can cut hard ingredients, but wooden cutting boards are heavy, difficult to clean and have poor antibacterial properties. They are easy to mold and breed bacteria, and require a lot of logging, which damages the ecological environment and is not environmentally friendly. Bamboo cutting boards are light, environmentally friendly and healthy, but they are easy to deform. Plastic cutting boards are light, but most plastic cutting boards are made of polypropylene, and the production quality is uneven.

[0003] Based on this, the present invention discloses a high-strength antibacterial chopping board and a preparation method thereof, which can ensure both the strength and antibacterial properties of the chopping board. Summary of the invention

[0004] In order to solve the technical problems existing in the prior art, the object of the present invention is to provide a high-strength antibacterial cutting board and a preparation method thereof.

[0005] In order to achieve the above purpose and the above technical effect, the technical solution adopted by the present invention is:

[0006] A high-strength antibacterial cutting board, wherein the raw materials for preparing the high-strength antibacterial cutting board include the following components in parts by weight:

[0007] PET 40-60 parts

[0008] Silver nanoparticles 5-25 parts

[0009] Nucleating agent 3-10 parts

[0010] 5-10 parts of antioxidants.

[0011] Furthermore, the raw materials for preparing the high-strength antibacterial cutting board also include the following components in parts by weight:

[0012] High density polyolefin 20-30 parts

[0013] 2-10 portions of walnut green peel

[0014] 3-20 parts of modified bamboo fiber

[0015] 5-8 parts of mussel biomimetic hydrogel.

[0016] Furthermore, the glass transition temperature of the high-density polyolefin is 30-65°C.

[0017] Furthermore, the modified bamboo fiber is a hydroxylated bamboo fiber with hydroxyl groups prepared by hydroxylating bamboo fibers. The hydroxyl groups can react with the ester groups in PET and can also react with the carbon-carbon double bonds in high-density polyolefins.

[0018] Furthermore, the particle size of the silver nanoparticles is 1-7 microns.

[0019] The present invention also discloses a method for preparing a high-strength antibacterial cutting board, comprising the following steps:

[0020] 1) by weight, 40-60 parts of PET, 3-10 parts of nucleating agent, 5-10 parts of antioxidant, 20-30 parts of high-density polyolefin and 3-20 parts of modified bamboo fiber are added into a high-speed mixer and mixed evenly, then 5-25 parts of silver nanoparticles, 2-10 parts of walnut green peel and 5-8 parts of mussel bionic hydrogel are added, the mixture is mixed evenly, and then added into a twin-screw extruder for plastication and granulation, so as to obtain a raw material for preparing a high-strength antibacterial cutting board;

[0021] 2) Add the raw materials for the high-strength antibacterial chopping board obtained in step 1) into an injection molding machine, inject it into a chopping board mold at 198-206° C. for injection molding, and take out the chopping board after cooling and molding.

[0022] Furthermore, in step 1), the stirring rate of the high-speed mixer is 250-350 r / min, and the stirring time is 5-15 min.

[0023] Further, in step 1), the temperatures of each section from the feed port of the twin-screw extruder to the die head of the twin-screw extruder are respectively:

[0024] 180-192℃, 190-200℃, 192-202℃, 195-205℃, 197-207℃, 200-210℃.

[0025] Furthermore, in step 2), the injection temperature is 290-360°C, the injection pressure is 80-200 MPa, and the mold temperature is 50-160°C.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The invention discloses a high-strength antibacterial chopping board and a preparation method thereof. PET, silver nanoparticles, a nucleating agent and an antioxidant are compounded, and high-density polyolefin, walnut green peel, modified bamboo fiber and mussel bionic hydrogel can be added. The hydroxyl group in the modified bamboo fiber can react with the ester group in PET and the carbon-carbon double bond in the high-density polyolefin, so that the prepared chopping board integrates the advantages of bamboo fiber, PET and high-density polyolefin. The chopping board has the advantages of high strength, high temperature resistance, no water absorption and low mold growth. It can also be steam sterilized, thereby improving the safety of use. The preparation process is simple, the raw material source is wide, the cost is low, and it is suitable for industrial promotion and use. DETAILED DESCRIPTION

[0028] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0029] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0030] The present invention discloses a high-strength antibacterial chopping board, and the raw materials for preparing the high-strength antibacterial chopping board include the following components in parts by weight:

[0031] PET 40-60 parts

[0032] Silver nanoparticles 5-25 parts

[0033] Nucleating agent 3-10 parts

[0034] 5-10 parts of antioxidants.

[0035] In some embodiments, the silver nanoparticles have a particle size of 1-7 microns.

[0036] In some embodiments, in order to further improve the performance of the high-strength antibacterial cutting board, the present invention can add the following components in parts by weight to the above-mentioned raw materials according to actual needs:

[0037] High density polyolefin 20-30 parts

[0038] 2-10 portions of walnut green peel

[0039] 3-20 parts of modified bamboo fiber

[0040] 5-8 parts of mussel biomimetic hydrogel.

[0041] In some embodiments, the high density polyolefin has a glass transition temperature of 30-65°C.

[0042] In some embodiments, the modified bamboo fiber is a hydroxylated bamboo fiber with a hydroxyl group made by hydroxylating bamboo fiber, and the hydroxyl group can react with the ester group in PET (polyethylene terephthalate) and can also react with the carbon-carbon double bond in high-density polyolefin.

[0043] The present invention also discloses a method for preparing a high-strength antibacterial cutting board, comprising the following steps:

[0044] 1) by weight, 40-60 parts of PET, 3-10 parts of nucleating agent, 5-10 parts of antioxidant, 20-30 parts of high-density polyolefin and 3-20 parts of modified bamboo fiber are added into a high-speed mixer and mixed evenly, then 5-25 parts of silver nanoparticles, 2-10 parts of walnut green peel and 5-8 parts of mussel bionic hydrogel are added, the mixture is mixed evenly, and then added into a twin-screw extruder for plastication and granulation, so as to obtain a raw material for preparing a high-strength antibacterial cutting board;

[0045] 2) Add the raw materials for the high-strength antibacterial chopping board obtained in step 1) into an injection molding machine, inject it into a chopping board mold at 198-206° C. for injection molding, and take out the chopping board after cooling and molding.

[0046] In step 1), the stirring rate of the high-speed mixer is 250-350 r / min, and the stirring time is 5-15 min.

[0047] In step 1), the temperatures of each section from the feed port of the twin-screw extruder to the die head of the twin-screw extruder are:

[0048] 180-192℃, 190-200℃, 192-202℃, 195-205℃, 197-207℃, 200-210℃.

[0049] In step 2), the injection temperature is 290-360°C, the injection pressure is 80-200 MPa, and the mold temperature is 50-160°C.

[0050] Example 1

[0051] A high-strength antibacterial chopping board, the raw materials for its preparation include the following components in parts by weight:

[0052] PET 50 parts

[0053] Silver nanoparticles 15 parts

[0054] 4 parts of nucleating agent

[0055] 5 parts of antioxidants.

[0056] The particle size of the silver nanoparticles is 3 microns.

[0057] A method for preparing a high-strength antibacterial cutting board comprises the following steps:

[0058] 1) By weight, 50 parts of PET, 4 parts of nucleating agent, and 5 parts of antioxidant are added into a high-speed mixer and mixed evenly, then 15 parts of silver nanoparticles are added, and the mixture is further mixed evenly, and then added into a twin-screw extruder for plasticizing and granulation, so as to obtain a raw material for preparing a high-strength antibacterial cutting board;

[0059] 2) Add the raw materials for the high-strength antibacterial chopping board obtained in step 1) into an injection molding machine, inject it into a chopping board mold at 200° C. for injection molding, and take out the chopping board after cooling and molding.

[0060] In step 1), the stirring rate of the high-speed mixer is 350 r / min, and the stirring time is 5 min.

[0061] In step 1), the temperatures of each section from the feed port of the twin-screw extruder to the die head of the twin-screw extruder are:

[0062] 185℃、190℃、192℃、195℃、197℃、200℃.

[0063] In step 2), the injection temperature is 310°C, the injection pressure is 100 MPa, and the mold temperature is 150°C.

[0064] Example 2

[0065] A high-strength antibacterial chopping board, the raw materials for its preparation include the following components in parts by weight:

[0066] PET 60 parts

[0067] Silver nanoparticles 5 parts

[0068] 3 parts of nucleating agent

[0069] 5 parts of antioxidants.

[0070] The particle size of the silver nanoparticles is 7 microns.

[0071] A method for preparing a high-strength antibacterial cutting board comprises the following steps:

[0072] 1) By weight, 60 parts of PET, 3 parts of nucleating agent, and 5 parts of antioxidant are added into a high-speed mixer and mixed evenly, then 5 parts of silver nanoparticles are added, and the mixture is further mixed evenly, and then added into a twin-screw extruder for plastication and granulation, so as to obtain a raw material for preparing a high-strength antibacterial cutting board;

[0073] 2) Add the raw materials for the high-strength antibacterial chopping board obtained in step 1) into an injection molding machine, inject it into a chopping board mold at 206° C. for injection molding, and take out the chopping board after cooling and molding.

[0074] In step 1), the stirring rate of the high-speed mixer is 250 r / min, and the stirring time is 15 min.

[0075] In step 1), the temperatures of each section from the feed port of the twin-screw extruder to the die head of the twin-screw extruder are:

[0076] 192℃、195℃、195℃、195℃、197℃、200℃.

[0077] In step 2), the injection temperature is 360°C, the injection pressure is 200 MPa, and the mold temperature is 120°C.

[0078] Example 3

[0079] A high-strength antibacterial chopping board, the raw materials for its preparation include the following components in parts by weight:

[0080] PET 40 parts

[0081] 25 parts of silver nanoparticles

[0082] Nucleating agent 10 parts

[0083] 10 parts of antioxidants.

[0084] The particle size of the silver nanoparticles is 1 micron.

[0085] A method for preparing a high-strength antibacterial cutting board comprises the following steps:

[0086] 1) By weight, 40 parts of PET, 10 parts of nucleating agent, and 10 parts of antioxidant are added into a high-speed mixer and mixed evenly, then 25 parts of silver nanoparticles are added, and the mixture is further mixed evenly, and then added into a twin-screw extruder for plasticizing and granulation, so as to obtain a raw material for preparing a high-strength antibacterial cutting board;

[0087] 2) Add the raw materials for the high-strength antibacterial chopping board obtained in step 1) into an injection molding machine, inject it into a chopping board mold at 198° C. for injection molding, and take out the chopping board after cooling and molding.

[0088] In step 1), the stirring rate of the high-speed mixer is 300 r / min, and the stirring time is 12 min.

[0089] In step 1), the temperatures of each section from the feed port of the twin-screw extruder to the die head of the twin-screw extruder are:

[0090] 188℃, 190℃, 192℃, 195℃, 197℃, 202℃.

[0091] In step 2), the injection temperature is 290°C, the injection pressure is 150 MPa, and the mold temperature is 140°C.

[0092] Example 4

[0093] A high-strength antibacterial chopping board, the raw materials for its preparation include the following components in parts by weight:

[0094] PET 40 parts

[0095] Nucleating agent 10 parts

[0096] 10 parts antioxidant

[0097] High density polyolefin 30 parts

[0098] 25 parts of silver nanoparticles

[0099] 10 servings of walnut green peel

[0100] 20 parts of modified bamboo fiber

[0101] 8 servings of mussel biomimetic hydrogel.

[0102] The glass transition temperature of high density polyolefin is 45°C.

[0103] The particle size of the silver nanoparticles is 5 microns.

[0104] The modified bamboo fiber is a hydroxylated bamboo fiber with hydroxyl groups made by hydroxylating bamboo fiber. The hydroxyl groups can react with the ester groups in PET (polyethylene terephthalate) and can also react with the carbon-carbon double bonds in high-density polyolefins.

[0105] A method for preparing a high-strength antibacterial cutting board comprises the following steps:

[0106] 1) By weight, 40 parts of PET, 10 parts of nucleating agent, 10 parts of antioxidant, 30 parts of high-density polyolefin and 20 parts of modified bamboo fiber are added into a high-speed mixer and mixed evenly, then 25 parts of silver nanoparticles, 10 parts of walnut green peel and 8 parts of mussel bionic hydrogel are added, and the mixture is mixed evenly, and then added into a twin-screw extruder for plastication and granulation, so as to obtain a raw material for preparing a high-strength antibacterial cutting board;

[0107] 2) Add the raw materials for the high-strength antibacterial chopping board obtained in step 1) into an injection molding machine, inject it into a chopping board mold at 200° C. for injection molding, and take out the chopping board after cooling and molding.

[0108] In step 1), the stirring rate of the high-speed mixer is 300 r / min, and the stirring time is 10 min.

[0109] In step 1), the temperatures of each section from the feed port of the twin-screw extruder to the die head of the twin-screw extruder are:

[0110] 185℃、190℃、192℃、195℃、197℃、200℃.

[0111] In step 2), the injection temperature is 290°C, the injection pressure is 120 MPa, and the mold temperature is 150°C.

[0112] Example 5

[0113] A high-strength antibacterial chopping board, the raw materials for its preparation include the following components in parts by weight:

[0114] PET 50 parts

[0115] Nucleating agent 6 parts

[0116] 8 parts antioxidant

[0117] High density polyolefin 25 parts

[0118] Silver nanoparticles 10 parts

[0119] 7 portions of walnut green peel

[0120] 10 parts of modified bamboo fiber

[0121] 6 servings of mussel biomimetic hydrogel.

[0122] The glass transition temperature of high-density polyolefin is 55°C.

[0123] The particle size of the silver nanoparticles is 7 microns.

[0124] The modified bamboo fiber is a hydroxylated bamboo fiber with hydroxyl groups made by hydroxylating bamboo fiber. The hydroxyl groups can react with the ester groups in PET (polyethylene terephthalate) and can also react with the carbon-carbon double bonds in high-density polyolefins.

[0125] A method for preparing a high-strength antibacterial cutting board comprises the following steps:

[0126] 1) by weight, 50 parts of PET, 6 parts of nucleating agent, 8 parts of antioxidant, 25 parts of high-density polyolefin and 10 parts of modified bamboo fiber are added into a high-speed mixer and mixed evenly, then 10 parts of silver nanoparticles, 7 parts of walnut green peel and 6 parts of mussel bionic hydrogel are added, the mixture is mixed evenly, and then added into a twin-screw extruder for plastication and granulation, so as to obtain a raw material for preparing a high-strength antibacterial cutting board;

[0127] 2) Add the raw materials for the high-strength antibacterial chopping board obtained in step 1) into an injection molding machine, inject it into a chopping board mold at 200° C. for injection molding, and take out the chopping board after cooling and molding.

[0128] In step 1), the stirring rate of the high-speed mixer is 250 r / min, and the stirring time is 15 min.

[0129] In step 1), the temperatures of each section from the feed port of the twin-screw extruder to the die head of the twin-screw extruder are:

[0130] 192℃、195℃、195℃、195℃、197℃、205℃.

[0131] In step 2), the injection temperature is 300°C, the injection pressure is 150 MPa, and the mold temperature is 150°C.

[0132] The rest is the same as Example 4.

[0133] Example 6

[0134] A high-strength antibacterial chopping board, the raw materials for its preparation include the following components in parts by weight:

[0135] PET 60 parts

[0136] Nucleating agent 10 parts

[0137] 10 parts antioxidant

[0138] High density polyolefin 20 parts

[0139] Silver nanoparticles 5 parts

[0140] 2 portions of walnut peel

[0141] 3 parts modified bamboo fiber

[0142] 5 parts of mussel biomimetic hydrogel.

[0143] The glass transition temperature of high-density polyolefin is 60°C.

[0144] The particle size of the silver nanoparticles is 2 microns.

[0145] The modified bamboo fiber is a hydroxylated bamboo fiber with hydroxyl groups made by hydroxylating bamboo fiber. The hydroxyl groups can react with the ester groups in PET (polyethylene terephthalate) and can also react with the carbon-carbon double bonds in high-density polyolefins.

[0146] A method for preparing a high-strength antibacterial cutting board comprises the following steps:

[0147] 1) by weight, 60 parts of PET, 10 parts of nucleating agent, 10 parts of antioxidant, 20 parts of high-density polyolefin and 3 parts of modified bamboo fiber are added into a high-speed mixer and mixed evenly, then 5 parts of silver nanoparticles, 2 parts of walnut green peel and 5 parts of mussel bionic hydrogel are added, the mixture is mixed evenly, and then added into a twin-screw extruder for plastication and granulation, so as to obtain a raw material for preparing a high-strength antibacterial cutting board;

[0148] 2) Add the raw materials for the high-strength antibacterial chopping board obtained in step 1) into an injection molding machine, inject it into a chopping board mold at 200° C. for injection molding, and take out the chopping board after cooling and molding.

[0149] In step 1), the stirring rate of the high-speed mixer is 350 r / min, and the stirring time is 5 min.

[0150] In step 1), the temperatures of each section from the feed port of the twin-screw extruder to the die head of the twin-screw extruder are:

[0151] 188℃、190℃、195℃、195℃、197℃、200℃.

[0152] In step 2), the injection temperature is 290°C, the injection pressure is 100 MPa, and the mold temperature is 160°C.

[0153] The rest is the same as Example 4.

[0154] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0155] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A high-strength antibacterial cutting board, characterized in that: The raw materials for preparing the high-strength antibacterial cutting board include the following components in parts by weight: PET 40-60 parts Silver nanoparticles 5-25 parts Nucleating agent 3-10 parts Antioxidant 5-10 parts.

2. A high-strength antibacterial cutting board according to claim 1, characterized in that: Also includes the following components in parts by weight: High density polyolefin 20-30 parts 2-10 portions of walnut green peel Modified bamboo fiber 3-20 parts 5-8 parts of mussel biomimetic hydrogel.

3. A high-strength antibacterial cutting board according to claim 2, characterized in that: The glass transition temperature of the high-density polyolefin is 30-65°C.

4. The high-strength antibacterial cutting board according to claim 2, characterized in that: The modified bamboo fiber is a hydroxylated bamboo fiber with a hydroxyl group prepared by hydroxylating bamboo fiber. The hydroxyl group can react with the ester group in PET and can also react with the carbon-carbon double bond in high-density polyolefin.

5. The high-strength antibacterial cutting board according to claim 1, characterized in that: The particle size of the silver nanoparticles is 1-7 microns.

6. The method for preparing a high-strength antibacterial cutting board according to any one of claims 1 to 5, characterized in that: The following steps are involved: 1) by weight, 40-60 parts of PET, 3-10 parts of nucleating agent, 5-10 parts of antioxidant, 20-30 parts of high-density polyolefin and 3-20 parts of modified bamboo fiber are added into a high-speed mixer and mixed evenly, then 5-25 parts of silver nanoparticles, 2-10 parts of walnut green peel and 5-8 parts of mussel bionic hydrogel are added, the mixture is mixed evenly, and then added into a twin-screw extruder for plastication and granulation, so as to obtain a raw material for preparing a high-strength antibacterial cutting board; 2) Add the raw materials for the high-strength antibacterial chopping board obtained in step 1) into an injection molding machine, inject it into a chopping board mold at 198-206° C. for injection molding, and take out the chopping board after cooling and molding.

7. The method for preparing a high-strength antibacterial cutting board according to claim 6, characterized in that: In step 1), the stirring rate of the high-speed mixer is 250-350 r / min, and the stirring time is 5-15 min.

8. The method for preparing a high-strength antibacterial cutting board according to claim 6, characterized in that: In step 1), the temperatures of each section from the feed port of the twin-screw extruder to the die head of the twin-screw extruder are: 180-192℃、190-200℃、192-202℃、195-205℃、197-207℃、200-210℃。 9. The method for preparing a high-strength antibacterial cutting board according to claim 6, characterized in that: In step 2), the injection temperature is 290-360°C, the injection pressure is 80-200 MPa, and the mold temperature is 50-160°C.