How to Identify LDPE vs HDPE Plastic: Key Differences and Recycling Codes

Learn how to tell LDPE and HDPE plastics apart by feel, common uses, and recycling codes #4 and #2 for effective sorting.

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LDPE (Low-Density Polyethylene) feels softer and more flexible, commonly used for plastic bags and film wrap. HDPE (High-Density Polyethylene) is harder and more rigid, ideal for milk jugs, detergent bottles, and piping. Check for recycling codes: LDPE often displays #4, while HDPE typically has #2.

FAQs & Answers

  1. What are the main uses of LDPE and HDPE plastics? LDPE is commonly used for soft, flexible items like plastic bags and film wrap, while HDPE is used for harder, rigid products such as milk jugs, detergent bottles, and piping.
  2. How can I identify LDPE and HDPE by their recycling codes? LDPE plastic usually has the recycling code #4, and HDPE typically has the recycling code #2 displayed on the product.
  3. What physical differences distinguish LDPE from HDPE? LDPE feels softer and more flexible, whereas HDPE is harder and more rigid to the touch.

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