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Food-grade antibacterial antistatic PLA material and preparation method thereof

A food-grade, anti-static technology, applied in the field of food-grade antibacterial and antistatic PLA materials and preparation, can solve the problems of easy electrostatic ash absorption, poor antibacterial performance of polylactic acid film, affecting the hygiene of packaged food, etc., and achieves good antibacterial effect. The effect of good capacitance and excellent antistatic dust removal performance

Inactive Publication Date: 2020-10-16
苏州环诺新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Nevertheless, pure polylactic acid film has poor antibacterial performance, and at the same time, it is easy to electrostatically absorb dust during granulation and finished product processing, which affects the hygiene of packaged food. Therefore, in the application of food packaging industry, it is necessary to further improve the antibacterial properties of polylactic acid Food grade antibacterial and antistatic properties

Method used

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  • Food-grade antibacterial antistatic PLA material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] S1, put 60 parts of PLA resin, 20 parts of PBAT, and 3 parts of glycidyl methacrylate into a high-speed mixer and stir for 3-5 minutes;

[0026] S2, 15 parts of talcum powder, 3 parts of antistatic agent, 1 part of zinc borate, 5 parts of chitosan, 2 parts of EBS are dropped into high-speed mixer and stirred for 3-5min;

[0027] S3. Add the S1 mixture into the twin-screw extruder through the main feeding hopper, and add the S2 mixture into the twin-screw extruder through the side feeding hopper, and then melt, extrude, pelletize, and dry to obtain pellets.

[0028] Among them, the barrel temperature of the twin-screw extruder is 150°C, the screw speed is 350r / min, and the main engine frequency is 18Hz.

Embodiment 2

[0030] S1, 70 parts of PLA resin, 10 parts of PBAT, 5 parts of maleic anhydride graft compatibilizer are dropped into high-speed mixer and stirred for 3-5min;

[0031] S2. Put 5 parts of calcium carbonate, 0.5 parts of antistatic agent, 3 parts of zinc borate, 3 parts of zinc oxide, 1 part of magnesium oxide, 7 parts of tea polyphenols, and 1 part of calcium stearate into a high-speed mixer and stir for 3-5 minutes ;

[0032] S3. Add the S1 mixture into the twin-screw extruder through the main feeding hopper, and add the S2 mixture into the twin-screw extruder through the side feeding hopper, and then melt, extrude, pelletize, and dry to obtain pellets.

[0033] Among them, the barrel temperature of the twin-screw extruder is 210°C, the screw speed is 450r / min, and the main engine frequency is 20Hz.

Embodiment 3

[0035] S1. Put 50 parts of PLA resin, 15 parts of PBAT, and 4 parts of silane coupling agent into a high-speed mixer and stir for 3-5 minutes;

[0036] S2. Put 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 polyphenols, and 1.5 parts of glyceryl monostearate into a high-speed mixer and stir for 3 -5min;

[0037] S3. Add the S1 mixture into the twin-screw extruder through the main feeding hopper, and add the S2 mixture into the twin-screw extruder through the side feeding hopper, and then melt, extrude, pelletize, and dry to obtain pellets.

[0038] Among them, the barrel temperature of the twin-screw extruder is 200°C, the screw speed is 400r / min, and the main engine frequency is 19Hz.

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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. The PLA material 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 an antistatic agent, 6-20 parts of an antibacterial agent, 3-5parts of a coupling agent and 1-2 parts of a lubricant. Compared with the prior art, the PLA material has the following beneficial effects that the used antibacterial agent is an inorganic-organic compounded antibacterial agent, so that the broad spectrum of the antibacterial material is further improved, the antibacterial effect is better, the cost is reduced, and the PLA material conforms to FDA, ROHS and REACH certification and tests and can be used for food and medical products. The used antistatic agent is sulfonate prepared by a distillation method, has good compatibility and no precipitate, and also has an excellent antistatic and dust-removing performance in a low-humidity environment.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a food-grade antibacterial and antistatic PLA material and a preparation method. Background technique [0002] 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 its own value, it is necessary to use a large amount of plastic packaging materials for packaging. [0003] Recently, major cities in my country have generally carried out garbage sorting, and the issue of green environmental protection has attracted more and more attention in our country. With the tightening of my country's environmental protection policies, the prevention and control of plastic pollution will be further strengthened. In the future, my country's disposable fast food boxes will be converted from non-degradable plastic materials to more environmentally friendly and degradable materials...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/02C08L5/08C08K13/02C08K3/34C08K3/38C08K5/20C08K3/26C08K3/22C08K5/098C08K13/04C08K7/26C08K3/08C08K5/103C08K3/015C08K5/00
CPCC08K2003/0806C08K2003/222C08K2003/2296C08K2003/265C08K2003/387C08K2201/017C08L67/04C08L2201/04C08L2205/02C08L2205/03C08L67/02C08L5/08C08K13/02C08K3/34C08K3/38C08K5/20C08K3/015C08K5/0058C08K3/26C08K3/22C08K5/098C08K13/04C08K7/26C08K3/08C08K5/103
Inventor 曹勇民王少卿曾少华
Owner 苏州环诺新材料科技有限公司
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