Why Aren't We Using Polyethylene Instead of Plastic?

Plastic production has become a ubiquitous component of our daily lives, with most of us unknowingly using numerous plastic products every day. While all plastic is derived from hydrocarbons extracted from petroleum or natural gas, plastic products are not all the same. This article explores why it makes more sense to use polyethylene as an alternative to plastic.

Understanding Plastics: The Numeric Codes

Plastic products in the U.S. and Canada are often marked with a symbol containing a number ranging from 1 to 7. These numbers help consumers identify the type of plastic, which is crucial for proper disposal and recycling. Let's delve into the details of these codes:

Polyethylene: An Overview

Polyethylene is a true plastic, and it is actually one of the earliest forms of man-made plastic discovered. Despite its age, polyethylene remains one of the most commonly produced and used plastics today due to its affordability and versatility. According to the broken triangle symbol used for recycling, the numbers 1, 2, and 4 all represent various types of polyethylene.

Why Polyethylene is Pervasive in Our Lives

Polyethylene is employed widely in various applications due to its numerous desirable properties. Some of the reasons why polyethylene is so prevalent include:

Cheapness and Ease of Production

One of the key reasons for the widespread use of polyethylene is its cost-effectiveness. Companies are inclined to use polyethylene whenever it can fulfill the required function due to its affordability.

Chemical Resistance and Versatility

Polyethylene has excellent chemical resistance properties, making it suitable for a wide range of foods and other products. This quality sets it apart from other plastics and increases its usage across various industries.

Common Applications

Due to its numerous positive attributes, polyethylene is found in many common items we use daily. From packaging to construction materials, polyethylene plays a crucial role in making our lives easier, safer, and more convenient.

Limitations and Alternatives

While polyethylene is an excellent option for many applications, there are scenarios where other plastics or materials are more appropriate. The choice of material often depends on specific requirements such as strength, heat resistance, chemical resistance, and UV stability. For example:

Strength and Heat Resistance

Plastics other than polyethylene are often used in applications requiring higher strength or heat resistance. Additionally, some products need to withstand chemical attacks or UV exposure, necessitating alternative materials that can better handle these environmental stresses.

Conclusion

While plastic use is inevitable in our daily lives, understanding the differences between the various types of plastic can help us make informed choices. Polyethylene, being the most common and versatile type of plastic, is an excellent alternative to many traditional plastic products. However, in certain scenarios, other plastics or materials are more suitable due to their unique properties.