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A chasing-arrows triangle around the numeral 4, identifying LDPE.
The numeral 4 identifies low-density polyethylene — carrier bags, squeezable bottles, film. Its softness is why kerbside schemes usually exclude it: film jams sorting machinery.
Identifies low-density polyethylene under the ASTM D7611 resin identification coding system.
Contexts: Packaging
Commonly excluded from kerbside collection because film and soft plastics jam the sorting equipment used for rigid containers.
Contexts: Packaging
Three arrows chasing one another around a triangular path, enclosing the numeral four at the centre.
Both are built from triangles, arrows and number like forms, and both are used in packaging contexts.