Application of Nanoparticles and Nanotechnology in Packaging and Printing Industry (Chinese)

Application of Nanotechnology in Packaging Industry

Because nanoparticle has many special properties, nanotechnology is playing a huge role in various aspects in the packaging industry:

1. Packaging materials

(1) The addition of nano-titanium dioxide and other particles to the packaging material can produce odor-elimination, sterilizing, and improve package quality and shelf life. The nano-layered silver-based inorganic antibacterial material can be used for many products such as antibacterial deodorant plastic products, antibacterial paper cups and the like. Disperse 30-40nm titanium dioxide into the resin to make the ultraviolet absorption film with strong absorption ability to light, which can be used in food sterilization bags and fresh-keeping bags.

(2) Nano-coatings have varying optical properties, and their optical transmission spectrum can extend from the ultraviolet to the far infrared. Nano-multi-layer composite coatings appear fluorescent in the visible light range after being processed, and nano-material coatings are applied on the surface of various signs to become luminous and reflective signs; the composition and characteristics of nano-coatings are changed, resulting in photochromic and temperature-induced discoloration. Electrochromic and other effects are special anti-counterfeiting and identification methods.

(3) Nano-sized titanium dioxide, nano-calcium carbonate and other nano-materials can modify plastics. By filling and modifying the plastics, the mechanical properties of the plastics can be improved, and various functional plastics can also be developed, such as conductive plastics, magnetic plastics, anti-degradable plastics, anti-ultraviolet and anti-aging plastics. The nano-plastics made of inorganic nano-materials uniformly dispersed in plastic have excellent physical and mechanical properties, high strength, good heat resistance, low density, good transparency and high gloss.

(4) Nano-silicon oxide particles are used as reinforcing agents and anti-aging agents for rubber; nano-alumina significantly improves the wear resistance and dielectric properties of rubber, so that its service life is significantly prolonged and its performance is greatly improved.

(5) Using an inexpensive silicon-based compound as a raw material to connect unusually fine suspended colloidal particles (sols) together (gel), thereby turning the liquid into a solid and producing a sol-gel glass. The quality of this glass Only half of ordinary glass; 80nm yttrium oxide can be used as an infrared shielding coating, and the efficiency of reflected heat is very high. Applying a nano-material coating on the surface of products such as glass can reduce the transmission of light and the heat transfer effect. Thermal insulation.

(6) Since the ceramic material is generally brittle, the nano-ceramic material pressed by the nano-particles has good toughness; the ceramics are processed into nano-powders, which can be melted at a low temperature and the surface-temperature-resistant components can be sintered. Nano-alumina is added to ceramics to enhance and enhance toughness, thereby improving the reliability of ceramic materials; in addition, there are high thermal conductivity ceramics such as diamond and aluminum nitride.

(7) The nano-grain metal is 3 to 5 times harder than the conventional coarse-grained metal. The nano-iron material is pressed into the surface by nano-iron crystals, which has a 12-fold increase in strength compared to ordinary iron and a hardness increase of 2 to 3 orders of magnitude. The use of nano-iron materials can produce special steels with high strength and high toughness. Composite materials such as metal-ceramics can change the mechanical properties of materials in a wider range.

(8) There are synergistic effects under certain conditions when two materials of different properties are used at the nanometer scale. Self-cleaning and anti-fog effects are achieved after super-parental interface materials are used on glass and ceramic tile surfaces, and super-hydrophobic and super-oleophobic effects have also been achieved after super-double-sandwich interface physical materials are processed on paper products and carton films. In the field of metal processing, the treatment of various metal surfaces with super-double-solubility interface material technology can enhance the anti-corrosion effect of metal.

(9) Hollow nanomaterials are inorganic compound nanomaterials, hollow prismatic, can be added to the nanomaterial in one of the monomer or monomer of the polymer firstly, and then poly(condensed) to make it high The linear molecules of the polymer pass through the gaps of the nanomaterials, increasing the polar bonding force between the nanomaterials and the polymer, and this nanomaterial configuration, like corundum, changes the polymer materials such as plastics, rubbers, and chemical fibers. After sex, its strength, toughness, wear resistance, etc. increase significantly higher than that of solid nanomaterials.

(10) In addition, due to the smaller particle size of the nanomaterial, and the decrease in the particle size of the surface morphology of the nanoparticle, the degree of smoothness of the surface becomes poor, forming an uneven atomic step, and the catalytic effect is enhanced. Nano-titanium dioxide can convert harmful substances into carbon dioxide, water, and organic acids under light conditions, and can purify air and improve air quality.

2. Packaging machinery

(1) Nano-magnetic-sensitive switches and sensors made of nano-microcrystalline magneto-impedance materials, due to their high sensitivity, good linearity, and good stability, will be used in packaging machinery to bring automation systems to a new level . In addition, the optical properties of nanomaterial coatings can also be used in optical applications such as sensors.

(2) Because nano-ceramics have good wear resistance, high strength and strong toughness, they can be used to manufacture seal rings and bearings for cutting tools and packaging machinery to improve their wear resistance and corrosion resistance. To produce surface coatings for key components of packaging conveyors and boiling dry beds.

(to be continued)