Guide to Plastic Containers Key Terms

Be a smart shopper for plastic containers by understanding the terminology

By Loraine Degraff

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Plastic containers are a convenient, practical and cost-efficient way of packaging. As a result, they appeal to practically every type of industry including food businesses, storage facilities and hazardous waste management sites. The use of plastic containers can create a more effective and organized work environment. If you do decide to utilize plastic containers in your workplace, there are a few terms you should know to ensure the smooth operation of your business.

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Polyethylene Terephthalate

PET (polyethylene terephthalate) is a polymer used to package soft drinks, water, household cleaners and more. Inexpensive and lightweight, it's an extremely popular packaging material.

I recommend: The National Association for PET Container Resources offers an abundance of information on PET recycling, usage and safety.

Polystyrene, polypropylene and polycarbonate

Polystyrene, polypropylene and polycarbonate are types of plastics. Polystyrene is the most common plastic used today in protective packaging such as foam containers and toys. Polypropylene is most often used in automotive parts, and carpeting. Polycarbonate is a thermoplastic used in drinking glasses and eyeglass lenses.

I recommend: There are different types of plastics used for a variety of purposes. Learn about the differences in polystyrene, polypropylene and polycarbonate plastics at PlasticsIndustry.com.

Recyclable

When a substance is recyclable, it can be broken down and used again. Recycling prevents waste, controls energy usage and reduces air pollution. Plastic containers are often recyclable.

I recommend: Learn more about recycling and recyclable items through Discovery Communications.

Resin and resin identification codes

Resin is a viscous substance derived from plants. It is used in plastics, adhesives and varnishes. The small numbers with the arrows around them located on the bottom of plastic containers are called resin identification codes. They indicate what kind of plastic is used in a specific item. These numbers help consumers understand what type of recycling (if any) should be applied to various plastic products.

I recommend: Go to Wisegeek.com to learn more about resin and its uses. The American Chemistry Council explains the resin identification code.

Bisphenol A

Bisphenol A is a questionable chemical compound used primarily to harden plastic. It has low acute toxicity and there is some concern about its effects on human health. Research is being done to determine the negative effects of Bisphenol A on the human body.

I recommend: Read about bisphenol A and the danger it poses at Seattle Post Intelligencer.