PE vs PO vs CPE vs PP Bags: Which Material Should You Choose?

If you're sourcing plastic bags from China, you've probably seen terms like PE, PO, CPE, and PP. But what's the difference? And which one is right for your product?

This guide breaks down each material — clarity, strength, cost, food safety, and best applications — so you can make an informed decision.

At a Glance: Material Comparison Table

1. PE (Polyethylene) — The Workhorse

Best for: General packaging, hardware, electronics accessories, food, retail

PE is the most common plastic bag material. It's economical, versatile, and available in different formulations (LDPE for softness, HDPE for strength). PE bags offer good moisture protection and are a versatile, cost-effective option.

Why choose PE: Lowest cost, widely available, good all-round performance. Perfect for most packaging needs where extreme clarity isn't required.

2. PO (Polyolefin) — The Clear Choice for Retail

Best for: Garment packaging, gift wrapping, retail display, boutique packaging

PO bags have superior clarity and softness compared to standard PE. They feel more premium and show off products beautifully. PO bags are the go-to choice for brands that want their packaging to enhance product presentation.

Why choose PO: Much clearer than PE, softer feel, better for presentation. The extra cost is justified for retail-facing applications.

3. CPE (Cast Polyethylene) — Ultra-Clear Premium

Best for: Premium food packaging, luxury apparel, delicate items, eco-conscious brands

CPE is made through a cast film process rather than blown film, resulting in exceptional clarity and uniform thickness. CPE bags are thinner than regular PE at the same strength, making them a more material-efficient choice. They're also more environmentally friendly as they use less material per bag.

Why choose CPE: Best clarity of any PE material, thinner yet strong, eco-friendlier. The premium price is worth it for high-end products.

4. PP (Polypropylene) — High-Strength Specialty

Best for: Hot-fill packaging, high-strength applications, specialty industrial use

PP bags offer the highest tensile strength and heat resistance of all four materials. They can withstand temperatures up to 140°C, making them suitable for hot-fill applications. PP also has excellent clarity, though it's less flexible than PE and CPE.

Why choose PP: Unmatched strength and heat resistance. The high cost and lower flexibility limit its use to specific applications where these properties are critical.

How to Choose: Decision Flowchart

How to Get a Comparable Quote

Material is only one of the variables. Resin grade and density, thickness tolerance, bag size, print coverage, closure type, packing method, order quantity, and Incoterms all move the unit price — often more than the choice between materials does. A single published "price per kg" cannot be valid across those combinations.

To compare the four materials on equal terms, send the same written specification for each and ask for a quote against it:

• Material and grade, with density or resin specification
• Size (width × length, plus gusset if any) and thickness with tolerance
• Closure type, print coverage and number of colours
• Packing method, carton count, and order quantity per size
• Target market and any compliance evidence you need from us
• Incoterms and destination port, if you want a landed figure

Once those are frozen, quotes for different materials are directly comparable — and the numbers stay valid when you place the order. Use our Shipping Calculator to estimate freight separately from the ex-works or FOB figure.