What's the price difference between single-polymer plastic scrap and mixed-polymer plastic scrap?
Short answer: Single-polymer plastic scrap — one clean, known resin type like PET or HDPE with nothing else mixed in — consistently prices higher than mixed-polymer scrap, because different plastics have different melting points and chemical properties that don't combine cleanly when reprocessed, meaning a buyer either has to sort a mixed load themselves or process it into a lower-grade, lower-value product.
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List Free →Why mixing polymers is a genuine processing problem
Different plastics melt at different temperatures and have different chemical structures — mixing polymer types together during reprocessing typically produces a weaker, less consistent output than reprocessing a single known resin type, which limits what the resulting material can be used for.
What this means for pricing
A buyer receiving unsorted mixed plastic either has to sort it themselves before processing, which costs them time and labor, or process it as-is into a lower-value mixed-plastic product — either way, that reduced value or added cost gets reflected in a lower price paid to you.
How big the price gap typically is
The exact gap depends on the specific polymers involved and current market demand for each, but expect single, clean, sorted resin types to command a meaningfully better rate than an unsorted mixed load of the same total weight.
How ScrapTrade Makes This Easier
Listing plastic scrap by specific resin type on ScrapTrade, rather than as one generic “mixed plastic” listing, connects you with buyers who can quote accurately for each type.
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