PEL is not a standard abbreviation in the field of general-purpose plastics or engineering plastics. In the context of common expressions in polymer materials, it mainly refers to "degradable polyester elastomer", a class of polymer materials that combines the rigidity of polyesters and the flexibility of elastomers. Its core feature is biodegradability by microorganisms in natural environments (e.g., soil, seawater), thus falling into the category of eco-friendly polymer materials.

Like PC, ABS is a standard universal abbreviation in the polymer materials field, referring essentially to Acrylonitrile-Butadiene-Styrene copolymer—a general-purpose engineering plastic copolymerized from three monomers (acrylonitrile, butadiene and styrene).

Unlike PEL and PAL mentioned earlier (non-standard abbreviations), PC is a universally accepted standard abbreviation in the polymer materials field, referring essentially to polycarbonate—an engineering plastic with repeating carbonate groups in its main molecular chain.

To understand bio-based nylon, it is necessary to first clarify the basic concept: PA, short for polyamide and commonly known as nylon, is a class of high molecular compounds with repeating amide groups in the main molecular chain, and also one of the earliest engineering plastics to achieve industrial production. Distinguished from traditional petroleum-based nylon, bio-based nylon refers to an eco-friendly polymer material whose monomer feedstocks (or partial feedstocks) are derived from renewable biomass resources instead of non-renewable petroleum.

PA, short for polyamide and commonly known as nylon, is a class of high molecular compounds with repeating amide groups in the main molecular chain. It is also one of the earliest engineering plastics to achieve industrial production.

PP is a standard universal abbreviation in the polymer materials field, referring essentially to polypropylene—a thermoplastic resin polymerized from propylene monomer and categorized as a general-purpose plastic.

Similar to PEL, PAL is not a universally accepted standard abbreviation in the polymer materials field.

Similar to PEL and PAL mentioned earlier, PL is not a universally recognized standard abbreviation in the polymer materials field.

PA12, whose full name is Polyamide 12, is commonly referred to as Nylon 12. It is an important member of the polyamide (PA) family.

Nylon materials prepared through ring-opening polymerization or condensation polymerization using raw materials obtained via bioengineering methods are collectively referred to as ​bio-based nylon materials. Common bio-based nylon materials include nylon 11, nylon 1010, nylon 610, nylon 510, nylon 410, and nylon 1012, among others.