CN111777845A - Food-grade antibacterial antistatic PLA material and preparation method thereof - Google Patents
Food-grade antibacterial antistatic PLA material and preparation method thereof Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 41
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000002216 antistatic agent Substances 0.000 claims abstract description 14
- 235000013305 food Nutrition 0.000 claims abstract description 14
- 239000003242 anti bacterial agent Substances 0.000 claims abstract description 12
- 239000011347 resin Substances 0.000 claims abstract description 10
- 229920005989 resin Polymers 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 9
- 239000007822 coupling agent Substances 0.000 claims abstract description 7
- 238000011049 filling Methods 0.000 claims abstract description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 7
- 239000000314 lubricant Substances 0.000 claims abstract description 7
- 239000011707 mineral Substances 0.000 claims abstract description 7
- 239000000843 powder Substances 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 7
- 239000008187 granular material Substances 0.000 claims description 7
- 238000002844 melting Methods 0.000 claims description 7
- 230000008018 melting Effects 0.000 claims description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 6
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 6
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims description 5
- 229920001661 Chitosan Polymers 0.000 claims description 5
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 5
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- BIKXLKXABVUSMH-UHFFFAOYSA-N trizinc;diborate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]B([O-])[O-].[O-]B([O-])[O-] BIKXLKXABVUSMH-UHFFFAOYSA-N 0.000 claims description 5
- 241001122767 Theaceae Species 0.000 claims description 4
- 239000000395 magnesium oxide Substances 0.000 claims description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims description 4
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims description 4
- 150000008442 polyphenolic compounds Chemical class 0.000 claims description 4
- 235000013824 polyphenols Nutrition 0.000 claims description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 3
- 239000011787 zinc oxide Substances 0.000 claims description 3
- GUJOJGAPFQRJSV-UHFFFAOYSA-N dialuminum;dioxosilane;oxygen(2-);hydrate Chemical compound O.[O-2].[O-2].[O-2].[Al+3].[Al+3].O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O GUJOJGAPFQRJSV-UHFFFAOYSA-N 0.000 claims description 2
- 229940075507 glyceryl monostearate Drugs 0.000 claims description 2
- 239000000155 melt Substances 0.000 claims description 2
- 239000001788 mono and diglycerides of fatty acids Substances 0.000 claims description 2
- 229910052901 montmorillonite Inorganic materials 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- 230000000845 anti-microbial effect Effects 0.000 claims 3
- RKISUIUJZGSLEV-UHFFFAOYSA-N n-[2-(octadecanoylamino)ethyl]octadecanamide Chemical compound CCCCCCCCCCCCCCCCCC(=O)NCCNC(=O)CCCCCCCCCCCCCCCCC RKISUIUJZGSLEV-UHFFFAOYSA-N 0.000 claims 2
- 150000008054 sulfonate salts Chemical class 0.000 claims 2
- 239000004599 antimicrobial Substances 0.000 claims 1
- -1 polybutylene terephthalate-adipate Polymers 0.000 claims 1
- 229920001896 polybutyrate Polymers 0.000 abstract description 8
- 238000004821 distillation Methods 0.000 abstract description 4
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 abstract description 4
- 239000000428 dust Substances 0.000 abstract description 3
- 150000002484 inorganic compounds Chemical class 0.000 abstract description 3
- 150000002894 organic compounds Chemical class 0.000 abstract description 3
- 239000002861 polymer material Substances 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 229940127554 medical product Drugs 0.000 abstract description 2
- 239000002244 precipitate Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 1
- 239000004626 polylactic acid Substances 0.000 description 15
- 229920000747 poly(lactic acid) Polymers 0.000 description 14
- 229920003023 plastic Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 238000004806 packaging method and process Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 229920006381 polylactic acid film Polymers 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 1
- 239000008116 calcium stearate Substances 0.000 description 1
- 235000013539 calcium stearate Nutrition 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 229920006238 degradable plastic Polymers 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 235000021485 packed food Nutrition 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 235000011888 snacks Nutrition 0.000 description 1
- 125000001273 sulfonato group Chemical group [O-]S(*)(=O)=O 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/017—Additives being an antistatic agent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/04—Antistatic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of high polymer materials, in particular to a food-grade antibacterial antistatic PLA material and a preparation method thereof. The composition comprises the following substances in parts by weight: 50-70 parts of PLA resin, 10-20 parts of PBAT, 5-20 parts of filling mineral powder, 0.5-3 parts of antistatic agent, 6-20 parts of antibacterial agent, 3-5 parts of coupling agent and 1-2 parts of lubricant. Compared with the prior art, the invention adopting the technical scheme has the following beneficial effects: the antibacterial agent used in the invention is an inorganic and organic compound antibacterial agent, so that the broad spectrum of the antibacterial material is further improved, the antibacterial effect is better, the cost is reduced, the antibacterial material conforms to the certification and test of FDA, ROHS and REACH, and can be used for food and medical products. The antistatic agent used in the invention is sulfonate prepared by a distillation method, has good compatibility and does not have precipitates. Can exert excellent antistatic dust removal performance under low humidity environment.
Description
Technical Field
The invention relates to the technical field of high polymer materials, in particular to a food-grade antibacterial antistatic PLA material and a preparation method thereof.
Background
After the food is produced and processed, in order to ensure that the food is free from various microorganisms or other physical and chemical factors and maintain the value of the food, a large amount of plastic packaging materials are required for packaging.
Recently, garbage classification is widely carried out in various big cities in China, and the problem of environmental protection is more and more emphasized in China. With the strictest environmental protection policy in China, the prevention and treatment of plastic pollution are further enhanced, and the disposable snack box in China is converted from a non-degradable plastic material to a more environmentally-friendly degradable material in the future.
The country will prohibit the use of non-degradable disposable plastic tableware.
The polylactic acid (PLA) material is a safe, efficient and pollution-free high polymer material approved by the United states food and drug administration, because the raw materials are taken from plant resources, the production and processing process has no pollution to the environment, has the strength and transparency of the traditional plastic, has good mechanical and physical properties, is convenient to process when being used for food packaging, has good air permeability, does not pollute the food and the environment, and has good biodegradability, and the final product is water and carbon dioxide, so the PLA material is a very green and environment-friendly material.
However, the pure polylactic acid film has poor antibacterial performance, and meanwhile, in the processes of granulation and finished product processing, the electrostatic dust absorption is easy to affect the sanitation of packaged food, so that the food-grade antibacterial and antistatic performance of the polylactic acid is further improved when the polylactic acid film is applied to the food packaging industry.
Disclosure of Invention
The purpose of the invention is as follows: in order to provide a food-grade antibacterial antistatic PLA material with better effect and a preparation method, the specific aim is to see a plurality of substantial technical effects of the specific implementation part.
In order to achieve the purpose, the invention adopts the following technical scheme:
a food-grade antibacterial antistatic PLA material is characterized by comprising the following substances in parts by weight: 50-70 parts of PLA resin, 10-20 parts of PBAT, 5-20 parts of filling mineral powder, 0.5-3 parts of antistatic agent, 6-20 parts of antibacterial agent, 3-5 parts of coupling agent and 1-2 parts of lubricant.
The further technical scheme of the invention is that the mineral powder filling material is at least one of calcium carbonate, talcum powder, diatomite and montmorillonite.
The invention further adopts the technical scheme that the antistatic agent is sulfonate prepared by a distillation method, and the sulfonate is food grade and/or medical grade.
The invention further adopts the technical scheme that the antibacterial agent is at least one of zinc borate, zinc oxide, magnesium oxide, silver powder, chitosan and tea polyphenol.
The invention further adopts the technical scheme that the coupling agent is at least one of glycidyl methacrylate, maleic anhydride grafting compatilizer and silane coupling agent.
The further technical scheme of the invention is that the lubricant is at least one of EBS, stearate and glyceryl monostearate.
A preparation method of a food-grade antibacterial antistatic PLA material is characterized by comprising the following steps:
s1, putting 70-90 parts of PLA resin, 10-20 parts of PBAT and 3-5 parts of coupling agent into a high-speed stirrer to stir for 3-5 min;
s2, putting 5-20 parts of filling mineral powder, 0.5-3 parts of antistatic agent, 6-20 parts of antibacterial agent and 1-2 parts of lubricant into a high-speed stirrer and stirring for 3-5 min;
and S3, adding the S1 mixed material into a double-screw extruder through a main feeding hopper, adding the S2 mixed material into the double-screw extruder through a side feeding hopper, and preparing granules through melting, extruding, granulating and drying.
The further technical scheme of the invention is that the melt extrusion process comprises the following steps: the temperature of the double-screw extruder barrel is 150-210 ℃, the rotating speed of the screw is 350-450r/min, the rotating speed of the main machine is 18-20Hz, and the vacuum degree is-0.06-0.08 MPa.
Compared with the prior art, the invention adopting the technical scheme has the following beneficial effects: the antibacterial agent used in the invention is an inorganic and organic compound antibacterial agent, so that the broad spectrum of the antibacterial material is further improved, the antibacterial effect is better, the cost is reduced, the antibacterial material conforms to the certification and test of FDA, ROHS and REACH, and can be used for food and medical products.
The antistatic agent used in the invention is sulfonate prepared by a distillation method, has good compatibility and does not have precipitates. Can exert excellent antistatic dust removal performance under low humidity environment.
Detailed Description
The present invention will be further illustrated with reference to the following specific embodiments, which are to be construed as merely illustrative, and not limitative of the remainder of the disclosure in any way whatsoever.
The patent provides a plurality of parallel schemes, and different expressions belong to an improved scheme based on a basic scheme or a parallel scheme. Each solution has its own unique features.
Example 1:
s1, putting 60 parts of PLA resin, 20 parts of PBAT and 3 parts of glycidyl methacrylate into a high-speed stirrer and stirring for 3-5 min;
s2, putting 15 parts of talcum powder, 3 parts of antistatic agent, 1 part of zinc borate, 5 parts of chitosan and 2 parts of EBS into a high-speed stirrer and stirring for 3-5 min;
and S3, adding the S1 mixed material into a double-screw extruder through a main feeding hopper, adding the S2 mixed material into the double-screw extruder through a side feeding hopper, and preparing granules through melting, extruding, granulating and drying.
Wherein the temperature of a charging barrel of the double-screw extruder is 150 ℃, the rotating speed of a screw is 350r/min, and the frequency of a main machine is 18 Hz.
Example 2:
s1, putting 70 parts of PLA resin, 10 parts of PBAT and 5 parts of maleic anhydride grafted compatilizer into a high-speed stirrer and stirring for 3-5 min;
s2, putting 5 parts of calcium carbonate, 0.5 part of antistatic agent, 3 parts of zinc borate, 3 parts of zinc oxide, 1 part of magnesium oxide, 7 parts of tea polyphenol and 1 part of calcium stearate into a high-speed stirrer to stir for 3-5 min;
and S3, adding the S1 mixed material into a double-screw extruder through a main feeding hopper, adding the S2 mixed material into the double-screw extruder through a side feeding hopper, and preparing granules through melting, extruding, granulating and drying.
Wherein the temperature of a charging barrel of the double-screw extruder is 210 ℃, the rotating speed of a screw is 450r/min, and the frequency of a main machine is 20 Hz.
Example 3:
s1, putting 50 parts of PLA resin, 15 parts of PBAT and 4 parts of silane coupling agent into a high-speed stirrer and stirring for 3-5 min;
s2, putting 5 parts of diatomite, 1 part of antistatic agent, 1 part of magnesium oxide, 0.5 part of silver powder, 10 parts of chitosan, 8.5 parts of tea polyphenol and 1.5 parts of glycerin monostearate into a high-speed stirrer to be stirred for 3-5 min;
and S3, adding the S1 mixed material into a double-screw extruder through a main feeding hopper, adding the S2 mixed material into the double-screw extruder through a side feeding hopper, and preparing granules through melting, extruding, granulating and drying.
Wherein the temperature of a charging barrel of the double-screw extruder is 200 ℃, the rotating speed of a screw is 400r/min, and the frequency of a main machine is 19 Hz.
Comparative example 1
The raw material ratio in the embodiment 1 is changed as follows:
s1, putting 60 parts of PLA resin, 20 parts of PBAT and 3 parts of glycidyl methacrylate into a high-speed stirrer and stirring for 3-5 min;
s2, putting 18 parts of talcum powder, 1 part of zinc borate, 5 parts of chitosan and 2 parts of EBS into a high-speed stirrer and stirring for 3-5 min;
and S3, adding the S1 mixed material into a double-screw extruder through a main feeding hopper, adding the S2 mixed material into the double-screw extruder through a side feeding hopper, and preparing granules through melting, extruding, granulating and drying.
Wherein the temperature of a charging barrel of the double-screw extruder is 150 ℃, the rotating speed of a screw is 350r/min, and the frequency of a main machine is 18 Hz.
Comparative example 2
The raw material ratio in the embodiment 1 is changed as follows:
s1, putting 60 parts of PLA resin, 20 parts of PBAT and 3 parts of glycidyl methacrylate into a high-speed stirrer and stirring for 3-5 min;
s2, putting 21 parts of talcum powder, 3 parts of antistatic agent and 2 parts of EBS into a high-speed stirrer and stirring for 3-5 min;
and S3, adding the S1 mixed material into a double-screw extruder through a main feeding hopper, adding the S2 mixed material into the double-screw extruder through a side feeding hopper, and preparing granules through melting, extruding, granulating and drying.
Wherein the temperature of a charging barrel of the double-screw extruder is 150 ℃, the rotating speed of a screw is 350r/min, and the frequency of a main machine is 18 Hz.
In summary, the invention has the following advantages:
the antibacterial agent used in the invention is an inorganic and organic compound antibacterial agent, so that the broad spectrum of the antibacterial material is further improved, and the antibacterial effect is better;
the antistatic agent used in the invention is sulfonate prepared by a distillation method, and the electrostatic ash absorption phenomenon on the surface of the material is obviously reduced.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, which is also within the scope of the appended claims.
Claims (8)
1. A food-grade antibacterial antistatic PLA material is characterized by comprising the following substances in parts by weight: 50-70 parts of PLA resin, 10-20 parts of PBAT, 5-20 parts of filling mineral powder, 0.5-3 parts of antistatic agent, 6-20 parts of antibacterial agent, 3-5 parts of coupling agent and 1-2 parts of lubricant.
2. The food-grade antibacterial antistatic PLA material as claimed in claim 1, wherein the mineral powder filling is at least one of calcium carbonate, talcum powder, diatomite and montmorillonite.
3. A food grade antimicrobial antistatic PLA material of claim 1 wherein the antistatic agent is a distilled sulfonate salt, the sulfonate salt being food grade and/or medical grade.
4. A food grade antimicrobial antistatic PLA material of claim 1 wherein the antimicrobial agent is at least one of zinc borate, zinc oxide, magnesium oxide, silver powder, chitosan, tea polyphenols.
5. A food grade antibacterial antistatic PLA material as claimed in claim 1 wherein the coupling agent is at least one of glycidyl methacrylate, maleic anhydride grafted compatibilizer, silane coupling agent.
6. A food grade antimicrobial antistatic PLA material as claimed in claim 1 wherein the lubricant is at least one of Ethylene Bis Stearamide (EBS), stearate, glyceryl monostearate.
7. A preparation method of a food-grade antibacterial antistatic PLA material is characterized by comprising the following steps:
s1, putting 70-90 parts of PLA resin, 10-20 parts of polybutylene terephthalate-adipate (PBAT) and 3-5 parts of coupling agent into a high-speed stirrer to stir for 3-5 min;
s2, putting 5-20 parts of filling mineral powder, 0.5-3 parts of antistatic agent, 6-20 parts of antibacterial agent and 1-2 parts of lubricant into a high-speed stirrer and stirring for 3-5 min;
and S3, adding the S1 mixed material into a double-screw extruder through a main feeding hopper, adding the S2 mixed material into the double-screw extruder through a side feeding hopper, and carrying out melting, extrusion, grain cutting and drying to obtain granules.
8. The preparation method of food-grade antibacterial antistatic PLA material according to claim 7, wherein the melt extrusion process is as follows: the temperature of the double-screw extruder barrel is 150-210 ℃, the rotating speed of the screw is 350-450r/min, the rotating speed of the main machine is 18-20Hz, and the vacuum degree is-0.06-0.08 MPa.
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| CN202010707868.0A CN111777845A (en) | 2020-07-21 | 2020-07-21 | Food-grade antibacterial antistatic PLA material and preparation method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112625411A (en) * | 2020-12-10 | 2021-04-09 | 好维股份有限公司 | Biodegradable antibacterial toothbrush and production process thereof |
| CN112679928A (en) * | 2020-12-28 | 2021-04-20 | 东莞市三至新材料技术有限公司 | Full-biodegradable antibacterial PLA/PBAT film and preparation method thereof |
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| CN115572476A (en) * | 2022-10-10 | 2023-01-06 | 孙明亮 | Antibacterial flame-retardant water-resistant polyurethane elastomer and preparation method thereof |
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| CN112625411A (en) * | 2020-12-10 | 2021-04-09 | 好维股份有限公司 | Biodegradable antibacterial toothbrush and production process thereof |
| CN112625411B (en) * | 2020-12-10 | 2023-03-10 | 好维股份有限公司 | A kind of biodegradable antibacterial toothbrush and its production process |
| CN112679928A (en) * | 2020-12-28 | 2021-04-20 | 东莞市三至新材料技术有限公司 | Full-biodegradable antibacterial PLA/PBAT film and preparation method thereof |
| CN113415044A (en) * | 2021-07-01 | 2021-09-21 | 百草春天大生物科技(青岛)有限公司 | Large biological stone plastic floor containing tea bioactive component |
| CN113637299A (en) * | 2021-08-27 | 2021-11-12 | 昌亚新材料科技有限公司 | Heat-resistant and impact-resistant polylactic acid composite material and preparation method and application thereof |
| CN113637299B (en) * | 2021-08-27 | 2022-04-05 | 宁波昌亚新材料科技股份有限公司 | Heat-resistant and impact-resistant polylactic acid composite material and preparation method and application thereof |
| CN115572476A (en) * | 2022-10-10 | 2023-01-06 | 孙明亮 | Antibacterial flame-retardant water-resistant polyurethane elastomer and preparation method thereof |
| CN115572476B (en) * | 2022-10-10 | 2024-07-09 | 宁波甬浪新材料科技有限公司 | Antibacterial flame-retardant waterproof polyurethane elastomer and preparation method thereof |
| CN120842806A (en) * | 2025-07-15 | 2025-10-28 | 科伦塑业集团股份有限公司 | A kind of anti-UV ground film and its preparation method and application |
| CN120842806B (en) * | 2025-07-15 | 2026-05-05 | 科伦塑业集团股份有限公司 | A UV-resistant mulch film, its preparation method and application |
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