Nanomaterials in Food Packaging
The use of nanomaterials in food packaging is already a reality. Nanotechnology can
be used in plastic food packaging to make it stronger, lighter or perform better.
Antimicrobials such as nanoparticles of silver or titanium dioxide can be used in
packaging to prevent spoilage of foods. Another addition is the introduction of
nanoparticles of clay into packaging to block oxygen, carbon dioxide and moisture from
reaching the food, and also aids in preventing spoilage. Chemical giant Bayer produces a
transparent plastic film called Durethan which contains nanoparticles of clay. Durethan is
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an engineering plastic based on polyamide 6 and polyamide 66; these particles offer an
excellent combination of properties which include high strength and toughness, abrasion
resistance, chemical resistance, and resistance to cracking. Durethan is used in various
industries and applications, including packaging film for the medical field and food
packaging. The nanoparticles are spread throughout the plastic and are able to block
oxygen, carbon dioxide and moisture from reaching fresh meats or other foods. The
advantage of using nanoclay is it also makes the plastic lighter, stronger and more heatresistant.
Durethan film material with nanoparticles combines the advantages of
polyamide 6 and ethylene vinyl alcohol (EVOH) to produce an inexpensive but still very
airtight packaging material. The embedded nanoparticles prevent gases from penetrating
the film and also keeping moisture from escaping.