How Do PE, PP, PO and CPE Compare for Plastic Bag Applications?
Start with the default PE vs PP comparison, then review the actual resin and specification needed for the project.
Default comparison example: PE vs PP is shown first as a starting point. PO and CPE are commercial descriptions that should be defined by the actual resin, process and performance requirements before quoting.
PE vs PP: Default Comparison
| Property | PE | PP |
|---|---|---|
| Typical position | Flexible, versatile packaging resin | Stiffer resin for specified applications |
| Relative strength | Depends on LDPE, HDPE, LLDPE and construction | Depends on grade, thickness and test method |
| Transparency | Depends on resin and film process | Depends on grade and process |
| Common uses | Flat bags, liners and general PE packaging | Stiffer packaging and specialty applications |
This is a screening comparison, not a material certification or a finished-bag performance guarantee.
Select a Material
🫧
LDPE
Low Density
FOB quoted by specification
💎
HDPE
High Density
FOB quoted by specification
🧊
LLDPE
Linear Low Density
FOB quoted by specification
Property Comparison
| Property | LDPE | HDPE | LLDPE |
|---|---|---|---|
| Clarity / Transparency | |||
| Tensile Strength | |||
| Flexibility | |||
| Puncture Resistance | |||
| Heat Sealability | |||
| Chemical Resistance |
Material Details — LDPE
Soft, flexible, clear — LDPE is the most common material for general-purpose PE bags including flat bags, zip lock bags, and self-adhesive bags.
Clarity
Strength
Flexibility
Cost Efficiency
Best Use Cases
🛍️
Shopping & retail bags
👕
Apparel packaging
🥖
Bread & bakery bags
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