The term advanced recycling describes a family of plastics recycling processes that yield a variety of versatile end products. Sometimes the term feedstock recycling or chemical recycling is used. These end products can be the building blocks from which plastics are made. By unlinking or unzipping plastics (polymers) to their original molecular components, recyclers can produce monomers or a petroleum product that can be made into monomers (the basic units from which plastics are made) or a number of other petroleum-based products. These developmental processes signal a significant technical breakthrough in plastics recycling technology because the products are identical to virgin feedstocks and monomers used to produce new plastics. Advanced recycling technologies are being researched to augment existing conventional mechanical systems as part of an integrated approach. They are designed to increase the volume of post-consumer plastics diverted from the waste stream and expand the variety of plastics that are recycled into new and useful products.