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High-Density Polyethylene (HDPE)
High-density polyethylene — PETILEN YY
Related knowledge articles
What Is Polyethylene (PE)? The AYPE, YYPE and LLDPE Family
Three materials produced from the same monomer (ethylene) but behaving very differently depending on density and chain structure: where does the difference between AYPE, YYPE and LLDPE come from?
Key Differences Between PP and PE
Both are from the polyolefin family, but each is produced for different properties and different applications. Which is preferred in which case?
What Is MFI (Melt Flow Index) and How Do You Read It?
The most frequently asked value on a spec sheet: what does MFI measure, which production method suits low vs. high MFI, and why is the test condition always written next to the value?
What Is Density and Why Does It Matter in Plastic Selection?
The single value that decides whether a PE is AYPE or YYPE: density. How is it measured, how does it relate to crystallinity, and how does it affect selection?
What Do Plastic Recycling Symbols (1-7) Mean?
The numbers inside the triangle on the bottom of bottles and packages are actually a material code. We explain what plastic each number from 1 to 7 represents and why it matters.
Types of Plastic: A Comparison of PP, PE, PET, PVC, PS, ABS
There are dozens of plastic types on the market, but most of what you encounter in daily life comes from six or seven main families. Where is each used, and what are the key differences?