Conventional Plastic Films vs Sustainable Films Essay -- Environment,

Sustainability has become and important issue in the world as the Green Movement continues to gain popularity. One area where research is being conducted to find a more sustainable production process is plastic films. Plastic films are defined as a packaging material, usually less than ten mils (a mil is 0.001 inch) in thickness, with an average of 0.7–1.5 mils, that can be used as a bag or wrapper. They are composed of a broad range of materials, which can be simple or complex depending on what a particular product or package demands (Osborn & Jenkins, 1992). There are two main categories of films used in packaging, conventional films and sustainable films. Conventional plastic films are much more widely used and have a larger market than sustainable films. The film can be made with different resins, each of which have unique structures and are ideal for specific applications. The films can be clear or colored, printed or plain, single- or multilayered and are often combined with other materials such as aluminum and paper. Examples of plastic films usages include Ziploc bags, trash bags, grocery sacks, drycleaner bags, and plastic wrap. The only common characteristic of all plastic conventional film is that it is flexible in nature. The most common resin used to create these plastic film packages is low-density polyethylene (LDPE). As a film LDPE has decent clarity, is a good moisture and gas barrier, and it can be heat sealed while retaining its strength and flexibility. Polypropylene (PP) is also a common resin used to create plastic film. It has an excellent moisture barrier, good transparency, gloss, and tensile strength. The PP resin also has a high melting point, which makes it appropriate for packages that need to be st... ...petroleum, which has been around for significantly longer and has a strong hold on the market. As sustainability continues to become an emerging concern for consumers bio-plastics will grow in importance in the packaging industry. Similar to auto companies who are searching for alternative sources of energy for automobiles, chemical companies are searching for alternatives to manufacture of plastic materials (Perkins & Lindsay, 2011). We have a limited supply of fossil fuels and ate the rate plastic products such as film are being produced and consumed each year, it is hard to say how long they will last. Bio-plastics currently represent only a small fraction of the emerging area of sustainable development, but their usage is growing. There is great potential for bio-plastics as replacements for the less-sustainable fossil fuel based plastics used in plastic film.