Plastiverse

Fact Sheets on Food Packaging Materials and Recycling

Food Packaging Forum Foundation
https://www.foodpackagingforum.org/packaging-fact-sheets

Description

FACT SHEETS

New Fact Sheet on Bioplastics

The Food Packaging Forum has recently published a new fact sheet addressing common questions and mix-ups around bioplastics. It clarifies the meaning of the terms “bio-based” and “biodegradable” when talking about bioplastics and further discusses aspects of chemical safety, environmental impacts associated with production, and practical implications for bioplastics use and disposal.

The fact sheet can help consumers and retailers make evidence-based decisions on when bioplastics make sense for them. Download the new fact sheet to the right, and check out the fact sheets on five other common food packaging materials below.

Bioplastics

Fact Sheets on Other Materials

Plastic

Paper and Board

Metal

Glass

Multimaterial

About Food Packaging Materials

Food packaging is essential for transporting, storing, handling, and preserving food. The most common food packaging materials are different types of plastic polymers, including bio-based and biodegradable plastics, paper and board, metal, glass, and various multilayer materials. The packaging materials are used in combination with each other and with other materials, such as printing inks, adhesives, and coatings.

Besides its many useful properties, food packaging is a well-known source of chemicals that can be transferred from the packaging into food and beverages. This process is called chemical migration, and it leads to low levels of chemical mixtures regularly becoming part of everybody’s diet. Some of the migrating chemicals have hazardous properties; for others, the effects on human health are unknown. More information is available in the Fact Sheet on Food Packaging and Human Health.

Many factors influence the chemical migration from packaging into foodstuffs, and not all types of food packaging are equally of concern. There are important differences in the chemical migration behavior for each type of food packaging. Therefore, it is of high importance to understand the material properties of food packaging and how they can affect migration.

The material fact sheets provide brief summaries of applications, material properties, chemical safety, and end-of-life options for six food packaging materials. They focus further on the recycling options of the different materials and explain why material properties have an influence on chemical safety as well as recyclability.

RECYCLING

of food packaging materials

Food packaging often turns into waste after short periods of use. Recycling is currently discussed as one option to reduce the environmental impact of food packaging. Efficient collection and separation processes are a prerequisite for successful recycling.

However, whether recycling can be applied to keep the material in a closed cycle and produce new food packaging strongly depends on the material type. Properties such as stability, color, and smell can change during recycling. Additionally, the chemical safety can be compromised if the material allows carry over of contaminants or tends to degrade in the process.

Therefore, some materials can be recycled almost infinitely into new food packaging. For others, the number of cycles is limited, and special measures are needed to guarantee the safety of the recycled material before it is used in contact with food again. The third group of materials cannot be recycled into new food packaging – these materials are either downcycled or not recycled at all. Currently, the main food packaging materials can be grouped accordingly as shown below. More information about food packaging recycling is available on the second page of each material fact sheet:

Multimaterial

Plastic

Paper and Board

Metal

Glass

Material properties and/or missing processes do not allow recycling into new food packaging

Most plastic food packaging (including bioplastics) that is not made of PET cannot be recycled into new food packaging due to missing processes and safety concerns. Therefore, it is typically downcycled and used in other applications, for example, in construction and agriculture.

Multilayer food packaging consisting of different plastic polymers or combinations of different materials is currently almost not recyclable, because the layers are very difficult to separate. Currently, only the paperboard fraction of beverage cartons can be separated in established recycling processes, but the recovered material is not used in contact with food again.

Addition of virgin material and special measures needed to guarantee function and safety of recycled food packaging

For other materials, such as polyethylene terephthalate (PET) and paper and board, established recycling processes exist. However, certain precautions must be taken to produce materials that are safe to use in contact with food. Alternatively, the direct contact of the recycled material with the food can be prevented by suitable measures such as barriers, which may, in turn, affect further recycling.

In addition to the safety concerns, plastic polymers and paper and board can only be recycled for a limited number of cycles and require the addition of virgin material.

Material properties and chemical safety of recycled food packaging remain high after repeated cycles

The ‘permanent’ materials metal and glass do not change their properties during recycling. They can be recycled over and over again, and the recycled materials are as safe as the virgin materials to be used in new food packaging. Although a very high content of recycled material is technically possible, some virgin raw materials for metal and glass are commonly added in most processes.

Recycling of metal and glass are energy intensive processes. However, glass in particular can be easily cleaned and sanitized, making this material an ideal candidate for reuse.