"Nano" is one of today's bustling topics. Nawei is the English translation of nanometer, the change is 10-9 (one-billionth of a meter). Nanotechnology is to study the size of the material in the range of 1 nanometer to 100 nanometers. The nature of the science and its application.

This article describes the nano-inorganic antibacterial agent has the safety, efficiency, long-lasting, broad-spectrum antibacterial function and high temperature, low price and other features, and its wide application prospects in the aseptic packaging of liquid milk.

Nanomaterials are materials that are at least one dimension (one direction) and less than 100 nanometers in length. Due to its small size and large specific surface area, nanoparticles have exotic or abnormal physical and chemical properties and have been widely used in many fields. The so-called nano-packaging material is a nano-composite material having nano-scale structural units made of particles or crystals having a dispersed phase size of 1 to 100 nm combined with other packaging materials or added. Nanostructures may become the basis for technological improvements. Once the critical dimensions of the material can be controlled, the characteristics of new materials and the functions of the equipment can be enhanced.

MOD series of nano high-performance inorganic antibacterial materials is a new type of inorganic antibacterial material that is nanometer technology guided sterile packaging. It uses MOD activity gene and inorganic nano silver compound as main antibacterial components, and is made of various inorganic materials as carrier. Inorganic antibacterial powder. The antibacterial material is prepared by adopting nanotechnology, and the traditional antibacterial agent production process is changed by simply using silver, copper, zinc and other metal ions as antibacterial active ingredients. The antibacterial machine is embedded with metal ions and photocatalysis, and has strong long-term anti-buckling function. The antibacterial rate can reach 99.9%. It completely solves the worldwide problem of discoloration of inorganic antibacterial packaging materials in the application. It is a kind of special-effect non-toxic broad-spectrum antibacterial agent, which can be widely used in liquid milk and beverage aseptic composite packaging.

Nano Inorganic Antibacterial Agent Features

Broad-spectrum antibacterial: antibacterial agent for common E. coli; Staphylococcus aureus, Candida albicans, Aspergillus niger, Penicillium, Pseudomonas aeruginosa, Salmonella, etc. Indeed strong antibacterial effect and aseptic function, sterile rate Up to 99% or less

Nanostructure: As the antibacterial agent is a nano-material, the Caichuan plant is prepared with the latest nanotechnology. It has a very large specific surface area, which makes its antibacterial performance more stable and reliable. It not only has antibacterial function, but also makes other properties improve.

Inorganic characteristics: MOD nano high-performance inorganic antibacterial agent is made of natural inorganic materials using nanotechnology, with high heat resistance and long-lasting performance, and will not affect the quality of antimicrobial products in the application process.

High temperature resistance: The antibacterial agent can withstand the high temperature of 1300°C and loses its antibacterial effect, and the antimony will not produce a bad color change.

Long-term safety: The antibacterial agent is tested by toxicology and other related projects, and its safety evaluation is safe.

Widely applicable: Nano-inorganic antibacterial agents can be widely used in plastic, paper, polymer materials, coatings, ceramics, glass, metal and other packaging products.

Easy to use: The use of nano-inorganic antibacterial agents does not need to change the production process and increase the production equipment, but only need to add in the production process according to the specified dosage.

Nano inorganic antibacterial agent addition method

1. Dry inorganic (or polymer) weight (powder) 2% -3% of the proportion of adult inorganic antibacterial agents, and ball milling mix for more than 30 minutes, it can be fully mixed evenly.

2. According to the proportion of dry plastic (or polymer material) weight (powder) of 2% -3%, the nanoscale inorganic antibacterial agent is directly added into the prepared wet material, and the mixture is stirred vigorously for more than 90 minutes, and the mixture can be fully mixed evenly.

The nano-films and coatings prepared as described above have good antibacterial properties.

Precautions

1. When using this antibacterial agent, preliminary tests should be conducted to understand the adaptability of the antibacterial agent to the raw materials and the application environment.

2. The use of this antibacterial agent will not adversely affect the quality of the product under normal circumstances, but exceptions may occur in the following circumstances:

A. The raw materials for the production of antimicrobial products contain strong reducing agents.
D. The production atmosphere for producing antibacterial products is a copolymerization reducing atmosphere. ,
c. Production temperature of antibacterial products>1300°C,
3. The antibacterial agent should be sealed and stored in a dry environment that is protected from light and high temperature.

M01) Types of Nano High Performance Inorganic Antibacterial Agents

1. MOD series nano high performance inorganic antibacterial agent (powder)
2. Injection grade (extrusion grade) antibacterial masterbatch
3. General-purpose (ultrafine) fiber antibacterial masterbatch 4. Adsorption sterilization nano-antibacterial deodorant

5. Nano Inorganic Antibacterial Coating

6. Nano antibacterial water filter

Nano Inorganic Antibacterial Agents Advantages for Liquid Milk Packaging

MOD nano high-performance inorganic antibacterial agent has obvious advantages for liquid milk packaging, especially injection molding grade (extrusion grade) antibacterial masterbatch, general grade (ultrafine) fiber antibacterial masterbatch as additive and nano inorganic antibacterial coating liquid is most convenient to use Actual effect.

Nanoscale bacteria packaging is a new type of packaging in recent years - a new type of packaging, its main advantage is good antibacterial preservation and high breaking bag strength. The use of nano-antibacterial agents modified PE (polyethylene), PP (polypropylene) film bags of milk, can effectively inhibit and kill E. coli, Staphylococcus aureus, etc., to prevent the growth of a variety of microorganisms, under the same conditions, the preservation period can be extended By more than eight days, in addition, its heat distortion temperature, tensile and bending properties have greatly improved, and it has become a truly unbreakable milk bag. The price of nano-film is lower than that of aluminum-plastic composite film, but its gas barrier property is several times higher.

Nano Inorganic Antibacterial Agent Research and Application Prospect

Nano-inorganic antibacterial agents are divided into two categories: one is a metal nano-oxide with its own antibacterial activity, represented by Ti02, ZnO, under the irradiation of ultraviolet rays, can produce reactive oxygen in water and air, and has a strong chemical activity. Can react with a variety of organics, killing most germs and viruses. It is therefore used in the production of antimicrobial fibers, antimicrobial plastics, antimicrobial glass, antimicrobial ceramics, and antimicrobial building materials. Experiments have shown that coating a thin layer of TiO2 on the glass, light for 3 hours, can achieve the effect of killing the coliform; light 4 hours, the toxin can be controlled below 5%. The other is based on the compound of silver zinc as the main antibacterial body, with fine Ti02 and Si02 as carriers, due to the special effects of ultra-fine nanometer-sized particles, the overall antibacterial effect is greatly improved, and the temperature resistance and powder are improved. The fineness, dispersion, and functional effects have all been brought into full play. For example, nano-composite silver antibacterial powder MFS350 developed by Zhoushan Mingri Nanomaterials Co., Ltd. uses nano-Si() 2 as the main raw material, and its average particle size is less than 90 nm, which is characterized by high efficiency, rapidness, long-lasting, and broad-spectrum antibacterial properties. The MOD nano high-performance inorganic antibacterial agent developed by Zhejiang Lishui Jindi Nano Material Co., Ltd. is a new type of inorganic antibacterial agent integrated with photocatalytic antibacterial technology, metal ion antibacterial technology and nano-preparation technology. MOD nano high-performance inorganic Antibacterial agents have the function of killing and stopping the growth of bacteria, preventing the growth of various microorganisms, and the durability and safety of antibacterial action. 'The MOD has been used in a variety of materials, has made a lot of related products, such as antibacterial ceramic products, antibacterial fabric fibers, antibacterial masterbatch and antibacterial plastic products, antibacterial cement.

At present, antimicrobial products are considered by all countries to be cross-century environmental protection and health products. The comprehensive application of antibacterial products can fundamentally eliminate the cross-contamination of bacteria between humans, humans, animals, and objects. Therefore, nano-inorganic antibacterial agents have a huge potential market.

(Author/Chen Xirong)

China Packaging News