XPE, IXPE and IXPP are the three members of the cross-linked polyolefin foam family, and buyers frequently ask which one they should choose. The answer depends on four variables: the thickness you need, the temperature your part must survive, your performance requirements, and your budget. This guide compares the three materials side by side so you can make the right call the first time.
What the Three Materials Share
All three are closed-cell foams whose polymer chains are cross-linked — chemically for XPE, or by electron-beam/gamma irradiation for IXPE and IXPP. Because every air cell is sealed, each foam is waterproof, dimensionally stable, resilient under compression, and easy to cut, die-cut, thermoform, print and laminate. They differ mainly in thickness range, heat resistance and cost.
XPE Foam: The Cost-Effective Workhorse
XPE (chemically cross-linked polyethylene) is produced in single layers from 2 mm to 12 mm and multi-layer sheets up to 200 mm. It offers strong closed-cell performance at the lowest cost of the three, with typical continuous-use temperatures from about −40 °C to 80 °C. Choose XPE for packaging protection, underfloor sound insulation, flotation products, yoga mats and general cushioning where moderate thickness is fine.
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IXPE Foam: Thin-Gauge Precision
IXPE (irradiation cross-linked polyethylene) delivers the same closed-cell performance as XPE but is available much thinner — from 0.1 mm — which makes it the material of choice for automotive interiors, baby play mats, gasket tape carriers and precision cushioning where every millimetre counts. Operating range is typically about −40 °C to 90 °C, slightly better than XPE.
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IXPP Foam: Highest Heat Resistance
IXPP (irradiation cross-linked polypropylene) is the most temperature-resistant of the cross-linked family, usable up to approximately 130 °C. It keeps closed-cell insulation where heat is a problem: engine compartments, exhaust-area shields, EV battery thermal barriers and high-temperature gaskets.
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How to Choose
- Need foam thinner than 2 mm? Choose IXPE.
- Need continuous heat above 90 °C? Choose IXPP.
- Need the lowest cost at 2–12 mm? Choose XPE.
- Need maximum density range or flame-retardant grades? Ask our engineers — all three families can be customised in density, thickness, width, colour and surface treatment.
Still unsure? Tell us your application, thickness, temperature and performance requirements and we will recommend the right material with samples before you commit.
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See also: All foam materials · Automotive foam · EV battery insulation foam · Closed-cell vs open-cell foam