Sustainability has become an important issue in the world as the Green Movement continues to gain popularity. One sector in which research is being conducted to find a more sustainable production process is that of plastic films. Plastic films are defined as a packaging material, usually less than ten mils (one mil is 0.001 inch) thick, averaging 0.7–1.5 mils, that can be used as a bag or wrap. They are composed of a wide range of materials, which can be simple or complex depending on what a particular product or package requires (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 from different resins, each of which has unique structures and is ideal for specific applications. Films can be transparent or coloured, printed or simple, single-layer or multi-layer and are often combined with other materials such as aluminum and paper. Examples of plastic film uses include Ziploc bags, garbage bags, grocery bags, dry cleaning bags, and plastic wraps. The only common feature of all conventional plastic films is that they are flexible in nature. The most common resin used to create these plastic film packaging is low density polyethylene (LDPE). As a film, LDPE has reasonable transparency, provides a good barrier against moisture and gases and can be heat sealed while maintaining its strength and flexibility. Polypropylene (PP) is also a common resin used to create plastic films. It has excellent moisture barrier, good transparency, gloss and tensile strength. PP resin also has a high melting point, making it suitable for packages that need to be sta... middle of paper... petroleum, which has been around much longer and has a strong hold on the market. As sustainability continues to become an emerging concern for consumers, bioplastics will become increasingly important in the packaging industry. Similar to automotive companies that are looking for alternative sources of energy for cars, chemical companies are looking for alternatives to the production of plastic materials (Perkins & Lindsay, 2011). We have a limited supply of fossil fuels, and with the rate at which plastic products such as film are produced and consumed each year, it is difficult to say how long they will last. Bioplastics currently represent only a small fraction of the emerging area of sustainable development, but their use is growing. There is great potential for bioplastics as replacements for the less sustainable fossil fuel-based plastics used in plastic films.
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