Short answer: XPE is chemically cross-linked polyethylene foam, EPE is expanded — that is, non-cross-linked — polyethylene foam, and EVA is a copolymer of ethylene and vinyl acetate. The difference that matters most in service is cross-linking, because it is what lets a foam hold its thickness after repeated compression instead of flattening out.
What Each Material Actually Is
XPE — chemically cross-linked polyethylene
Polyethylene resin is compounded with a cross-linking agent and expanded continuously. The cross-linking creates a three-dimensional molecular network, so the foam behaves like a thermoset rather than a thermoplastic. Bofeng Foam produces XPE from 3x to 40x expansion, giving apparent densities from 26.8 to 300 kg/m³, in single layers of 3–15 mm and laminated builds from 15 to 200 mm.
IXPE — irradiation cross-linked polyethylene
The same polyethylene, cross-linked by an electron beam instead of a chemical agent. No cross-linking agent is used, and single layers can be produced from 0.1 mm — considerably thinner than a chemically expanded foam can go.
EPE — expanded polyethylene
Non-cross-linked polyethylene foam, expanded with a physical blowing agent. It is softer, lighter and cheaper than XPE, and it is the material behind most low-cost cushioning and loose-fill. Because the polymer chains are not linked, the foam takes a permanent set more quickly under sustained load.
EVA — ethylene-vinyl acetate
A copolymer foam, not a polyethylene foam. The vinyl acetate content makes EVA soft and rubbery, which is why it dominates footwear midsoles and craft sheets. Bofeng Foam does not manufacture EVA foam.
XPE vs EPE vs EVA at a Glance
| Property | XPE | EPE | EVA |
|---|---|---|---|
| Cross-linking | Chemical | None | None — copolymer |
| Cell structure | Closed | Closed | Closed |
| Feel | Firm, resilient | Soft, light | Soft, rubbery |
| Recovery after compression | High — compression set 10% or lower | Lower — takes a set sooner | Moderate |
| Thinnest single layer | 3 mm (IXPE from 0.1 mm) | Limited | Limited |
| Water absorption (GB/T 1034) | 0.4% or lower | Closed-cell, low | Closed-cell, low |
| Relative cost | Higher | Lower | Varies |
Where the Difference Shows Up in Service
- Repeated compression. XPE's compression set is 10% or lower at 23 ± 2 °C over 22 hours. That is the property that keeps a gasket sealing and a mat from going flat. Non-cross-linked EPE takes a permanent set sooner under the same load.
- Thin parts. IXPE can be made in single layers from 0.1 mm, which is what makes it viable as a tape carrier or a thin backing layer. Neither EPE nor EVA is normally produced that thin.
- Consistency of thickness. Cross-linking fixes the cell structure before expansion finishes, so thickness and density hold across a roll.
- Cost. EPE is the cheapest of the three and is the right answer for one-trip protection where recovery does not matter.
How to Choose
- Gaskets, mats and reusable packaging — XPE. Cross-linking is what makes the part survive repeated compression.
- Thin backing, tape carriers, insole layers — IXPE, because single layers go down to 0.1 mm.
- One-trip cushioning on a tight budget — EPE.
- Rubbery feel for footwear or craft — EVA, which we do not supply.
What Bofeng Foam Manufactures
Bofeng Foam is a manufacturer of cross-linked polyolefin foam: XPE, IXPE and IXPP, produced on five lines with an annual capacity of 5,000 tonnes from 10,000 m² of workshops in Zhuhai, China. Non-cross-linked PE foam is supplied as a supporting grade. We do not manufacture EVA foam.
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XPE vs EPE vs EVA FAQ
Is XPE the same as EPE?
No. Both are polyethylene foams with closed cells, but XPE is cross-linked and EPE is not. Cross-linking is what gives XPE its recovery after compression — a compression set of 10% or lower at 23 °C over 22 hours — where EPE softens and takes a set sooner.
Which is cheaper, XPE or EPE?
EPE is the cheaper material because it skips the cross-linking step. It is the right choice for one-trip cushioning. Where the foam has to keep sealing or cushioning over many cycles, XPE works out cheaper because it does not need replacing.
Is XPE foam better than EVA foam?
They are different materials for different jobs. XPE is firmer and holds its thickness under load, which suits gaskets, mats and protective packaging. EVA is softer and more rubbery, which suits footwear and craft. Bofeng Foam manufactures XPE and IXPE, not EVA.
Related Reading
See also: Closed cell vs open cell foam · XPE vs IXPE vs IXPP · All cross-linked foam materials · Contact Bofeng Foam