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Preparation method of polyethylene antimicrobial packaging film

A technology of packaging film and polyethylene, which is applied in the field of preparation of polyethylene antibacterial packaging film, can solve the problems of strong specificity, poor broad spectrum, poor heat resistance, etc., and achieve the effect of green and environmental protection in the preparation process

Active Publication Date: 2016-09-28
SHANTOU HONGQIAO PACKAGING IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] From the above related reports, we can find that although organic antibacterial agents have rapid antibacterial effects, they generally have disadvantages such as poor heat resistance (below 200°C), strong specificity, and poor broad-spectrum, and are currently mainly used in the medical and health field; The sterilization rate of semiconductor oxides in antibacterial agents (which can be divided into two categories: semiconductor light-activated antibacterial and heavy metal sterilization) is not high, and the use of silver-based antibacterial agents is also limited due to high prices and other reasons.

Method used

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Embodiment 1

[0030] The preparation method of silver-loaded nano-titanium dioxide antibacterial agent was carried out according to the following steps: (1) After drying and crushing loquat leaves, add them to deionized water (the ratio of dry powder of loquat leaves to deionized water is 1 g:100 mL), shake Filtrate the water extract of loquat leaves; (2) Slowly drop 0.3 mol / L ammonia water into 0.1 mol / L AgNO 3 In the aqueous solution, prepare a 0.05 mol / L silver ammonia solution; (3) Add nano-titanium dioxide P25 into the silver ammonia solution (silver loading 0.5%), stir well, add 0.3 mol / L ammonia water to adjust the pH of the solution to 10. Prepare the mixed solution; (4) Add the water extract of loquat leaves obtained in step (1) to the mixed solution obtained in step (3) for reduction, suction filter and wash the obtained mixed solution, and dry the filter cake to obtain Silver-loaded nano-titanium dioxide. (5) Silver-loaded nano-titanium dioxide needs to be modified before it is ...

Embodiment 2

[0033] The preparation method of silver-loaded nano-titanium dioxide antibacterial agent was carried out according to the following steps: (1) After drying and crushing loquat leaves, add them to deionized water (the ratio of dry powder of loquat leaves to deionized water is 1 g:100 mL), shake Filtrate the water extract of loquat leaves; (2) Slowly drop 0.3 mol / L ammonia water into 0.1 mol / L AgNO 3 In the aqueous solution, prepare a 0.05 mol / L silver ammonia solution; (3) Add nano-titanium dioxide P25 into the silver ammonia solution (silver loading 0.5%), stir well, add 0.3 mol / L ammonia water to adjust the pH of the solution to 10. Prepare the mixed solution; (4) Add the water extract of loquat leaves obtained in step (1) to the mixed solution obtained in step (3) for reduction, suction filter and wash the obtained mixed solution, and dry the filter cake to obtain Silver-loaded nano-titanium dioxide. (5) Silver-loaded nano-titanium dioxide needs to be modified before it is ...

Embodiment 3

[0036] The preparation method of silver-loaded nano-titanium dioxide antibacterial agent was carried out according to the following steps: (1) After drying and crushing loquat leaves, add them to deionized water (the ratio of dry powder of loquat leaves to deionized water is 1 g:100 mL), shake Filtrate the water extract of loquat leaves; (2) Slowly drop 0.3 mol / L ammonia water into 0.1 mol / L AgNO 3 In the aqueous solution, prepare a 0.05 mol / L silver ammonia solution; (3) Add nano-titanium dioxide P25 into the silver ammonia solution (silver loading 0.5%), stir well, add 0.3 mol / L ammonia water to adjust the pH of the solution to 10. Prepare the mixed solution; (4) Add the water extract of loquat leaves obtained in step (1) to the mixed solution obtained in step (3) for reduction, suction filter and wash the obtained mixed solution, and dry the filter cake to obtain Silver-loaded nano-titanium dioxide. (5) Silver-loaded nano-titanium dioxide needs to be modified before it can...

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Abstract

The invention discloses a preparation method of a polyethylene antimicrobial packaging film. The preparation method is characterized by comprising the following steps of adding 0.3 to 1.0 part by weight of silver-loaded nano titania antimicrobial agent into 100 parts by weight of polyethylene resin; then adding 0.06 to 0.24 part of antioxidant 1076 and 0.04 to 0.16 part of auxiliary antioxidant 168; sufficiently mixing in a high-speed mixer, then granulating, drying and blowing film to prepare the polyethylene antimicrobial packaging film. Compared with the prior art, the preparation method disclosed by the invention has the beneficial effects that silver-ammonia ions are induced to form a strong interaction with the surface of titania by regulating a pH value; the silver-ammonia ions are reduced by using a water extract of a biomass loquat fruit, and further uniform compounding of silver and titania at the nanoscale is realized; no dispersing agent is needed, so that a preparation process is green and environmentally-friendly; the antibacterial rate of the prepared polyethylene antimicrobial packaging film to escherichia coli and staphylococcus aureus reaches 90 percent or above; the polyethylene antimicrobial packaging film is non-toxic, safe and sanitary.

Description

technical field [0001] The invention relates to a preparation method of a polyethylene antibacterial packaging film, in particular to a preparation method of a polyethylene antibacterial packaging film using silver-loaded nano-titanium dioxide as an antibacterial agent. Background technique [0002] With the development of science and technology and the improvement of people's living standards, people's health awareness has been continuously enhanced, and more attention has been paid to daily necessities, especially food safety and environmental sustainability. Plastic products are a class of items that people frequently touch in daily life, so the research and development of their antibacterial properties have important significance and practical value. [0003] Polyethylene is one of the most important resins among polyolefin resins, and it is a material with the fastest development and high demand in the world today. Polyethylene mainly includes low-density polyethylene,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K13/06C08K9/02C08K9/00C08K3/22C08K5/134C08K5/526
CPCC08K3/22C08K5/134C08K5/526C08K9/00C08K9/02C08K13/06C08K2003/2241C08K2201/011C08L2203/16C08L2207/066C08L23/06C08L23/0815
Inventor 罗仕泽罗永生杨欣
Owner SHANTOU HONGQIAO PACKAGING IND
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