In the recycling of plastics a distinction is made between pre-consumer recyclates and post-consumer recyclates. Pre-consumer recyclates come from materials that are separated from the waste stream during the manufacturing process. This is usually plastic waste of the same type and colour that cannot be directly reused in the production process for technical or legal reasons.
This does not include the reuse of materials from post-processing or regrinding that arise in the course of a technical process and can be reused in the same process. These are, for example, plastic label grids or punched grids of thermoformed PET trays.
In contrast, the term post-consumer resin - PCR for short - refers to the processing of packaging waste that arises after a use phase at end consumers, comparable sources of waste generation such as offices, hospitals, etc. and is collected via the yellow bag or the yellow bin, represents packaging subject to the deposit system or arises as commercial packaging waste, such as transport packaging like stretch film after securing from pallet transport.
In the recycling of plastics a distinction is made between pre-consumer recyclates and post-consumer recyclates. Pre-consumer recyclates originate from internal production waste and are directly returned to the manufacturing process, while the term post-consumer recycling - PCR for short - refers to the processing of packaging waste generated by end consumers or comparable sources of waste generation such as offices, hospitals, etc. and collected via the yellow bag or the yellow bin.
However, consumers' plastic waste can only be processed into a secondary raw material for the production of packaging, if it is available as pure plastics. Because not all plastics are the same: abbreviations such as PET, PP and PE stand for different types of plastic that are used in the production of packaging and have different properties.
For example Polyethylene terephthalate (PET) is often used for the production of disposable and reusable bottles for carbonated drinks or detergents. This is because PET is a transparent, rigid and at the same time resilient plastic that is not affected by oil, alcohol or diluted acids. The recyclable plastic polyethylene (PE) of high density is also resistant to fats, oils, acids as well as alkalis and is therefore used for packaging of chemicals, cosmetics, etc.. Polypropylene (PP) is characterised in the area of flexible packaging by its good printability and machinability. This is why it is used for chip bags or tubular bags for bars. In the dimensionally stable area, PP is often used for closures due to its well-suited flow properties.
The disadvantage: Even if pure plastic waste from the yellow bag or the yellow bin can be recycled well, in some cases those recyclates may not be used for food packaging. The European Food Safety Authority considers the risk of contamination of food through PCR from the yellow bag or the yellow bin as too great.