What are SPI codes?

What are SPI codes?

• A. Codes found on polymers often inside a Mobius Loop allowing the polymer to be identified and recycled accordingly
• B. Codes for metal alloys used in fasteners
• C. Codes indicating polymer color
• D. A labeling system for glass types

Answer: (A)

SPI codes are resin identification codes used on plastic packaging to identify the type of plastic resin. They’re usually found inside the Möbius recycling symbol and consist of a number from 1 to 7 that stands for a specific polymer (for example, PET, HDPE, PVC, LDPE, PP, PS, or other). This labeling helps recycling facilities sort plastics correctly and choose the appropriate processing stream, improving recycling efficiency. They aren’t about metal alloys, polymer color, or glass types.

SPI codes are resin identification codes used on plastic packaging to identify the type of plastic resin. They’re usually found inside the Möbius recycling symbol and consist of a number from 1 to 7 that stands for a specific polymer (for example, PET, HDPE, PVC, LDPE, PP, PS, or other). This labeling helps recycling facilities sort plastics correctly and choose the appropriate processing stream, improving recycling efficiency. They aren’t about metal alloys, polymer color, or glass types.