Plastic bags or pouch are a kind of packaging made from a thin or flexible plastic film, non-woven fabric, or plastic fabric. Plastic bags are used to contain and transport goods such as foods, products, powders, ice, magazines, chemicals and waste. Most of the plastic bags are heat sealed together.
Plastic bags are made of "film," or thin flexible plastic sheets.
Types of Plastic Bags
Other than size, shape, color, and other physical properties, plastic bags are available in various materials that offer their own advantages and features. the most common types of plastic that plastic bag manufacturers use, such as polyethylene.
HDPE
HDPE stands for High Density Polyethylene, which is the most common material used to make plastic shopping bags. The polymer material used in these bags is made of straight molecular chains that have a linear structure from start to finish.
LLDPE
LDPE stands for Low Density Polyethylene, which is a popular type of plastic used in food packaging as well as utility bags. The polymer material used in these plastic bags is made of low density polyethylene chains .
MDPE
MDPE stands for Medium Density Polyethylene, which is a mixture of High Density and Low Density Polyethylene. MDPE is not as clear as LDPE, but it is not as opaque as HDPE either. This polymer is less dense than HDPE, so it is not as strong and not a good choice for bulk storage or transportation. However, it has a high degree of chemical resistance.
PP
PP stands for Polypropylene, and it has a very high chemical resistance and strength as well as a high melting point, making it ideal for liquid or hot food packaging applications. Compared to other plastic plastic bags, polypropylene bags are less opaque and allow easy identification of their contents.
Impact of plastic bags on environment
The thing with plastic bags is that they break instead of biodegradation, and even over 1000 years. Petroleum products used in plastic bags are not decreasing at a desirable rate. It has the most impact on our planet's marine population and marine environment.
The death of aquatic wildlife has increased proportionally as production of plastic bags has increased.
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