Wrappings, biodegradable Packaging

In 2005, SPAR Austria started packaging organic apples, pears and tomatoes in rigid trays sealed with a flow wrap film made from NatureWorks PLA. Research showed that consumers perceive that nature-based packaging enhances the appeal of fresh food, and strongly prefer products packaged in biodegradable plastic containers. 

Coated or laminated paper products represent a significant potential market for biodegradable polymers. At present, packaging such as hamburger wrapping and disposable cups, are extrusion coated with low density polyethylene film that is resistant to biodegradation. This also restricts the biodegradation of the paper substrate since it acts as an impervious barrier. 

K. Khemani, P.J. Andersen, S.K. Hodson, and H. Schmidt, Biodegradable polymer films and sheets suitable for use as laminate coatings as well as wraps and other packaging materials, US Patent 6 573 340, assigned to Biotec Biologische Naturverpackungen GmbH Co. KG (DE), June 3, 2003. 

EarthSheU Corp. uses a combination of starch and limestone to make packaging products that are biodegradable and compostable. Products manufactured include cups, plates, bowls, sandwich wraps, and hinged-Ud containers. The company s foam laminate is produced by mixing the starch and limestone with water and fiber and placing it in a heated mold. Vaporization of the water foams, forms, and sets the product. The material physically disintegrates in water when it is crushed or broken. ... 

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