EVOH E44
Grade
also EVAL, Soarnol
E44 = 44 mol% ethylene
Best choice for biaxially oriented, shrink and stretch films, and for coex with LDPE at low temperature.
Values for the E44 condition
Other EVOH grades and fills
EVOH is listed in 11 conditions; see the grade overview at EVOH.
Compare all 11 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Flex-crack / pinhole-resistant grade | For pouches, bag-in-box and vacuum packs that are repeatedly flexed — modified for Gelbo flex durability. | 38 | 50 | 350 | 66 Shore D |
48 mol% ethylene | Pick for very low-temperature coextrusion, flexible pouches and blend/masterbatch use where barrier demand is modest. | 40 | 48 | 330 | 67 Shore D |
E44This page 44 mol% ethylene | Best choice for biaxially oriented, shrink and stretch films, and for coex with LDPE at low temperature. | 44 | 55 | 300 | 70 Shore D |
38 mol% ethylene | Use for deep-draw thermoforming, blow-moulded bottles and structures that must tolerate humidity. | 50 | 60 | 250 | 74 Shore D |
Retort-resistant grade | Use in packages sterilised at 121–135 °C: recovers barrier quickly after steam retort and resists moisture-induced haze. | 52 | 62 | 250 | 76 Shore D |
Blow-moulding / high-viscosity grade | Low-MFR grade with high melt strength for coex bottles, cosmetic containers and large drums. | 55 | 65 | 250 | 78 Shore D |
Injection-moulding grade | High-MFR grade for coinjected preforms/containers and rigid barrier parts. | 55 | 60 | 120 | 79 Shore D |
E32Default 32 mol% ethylene | Default workhorse: best balance of oxygen barrier, processability and cost for film, sheet and bottle coex layers. | 58 | 68 | 230 | 78 Shore D |
Fuel-barrier / lamellar blend grade | Grades qualified for HDPE fuel tanks and fuel lines — either as a coex layer or dispersed as lamellae in HDPE. | 58 | 70 | 200 | 80 Shore D |
27–29 mol% ethylene | Higher barrier than the 32 mol% standard, still coextrudable with PP at normal temperatures. | 62 | 72 | 180 | 80 Shore D |
24 mol% ethylene | Choose when the lowest possible oxygen transmission is required and the structure stays dry and rigid. | 65 | 75 | 150 | 82 Shore D |
What is EVOH E44?
EVOH E44 is EVOH in the E44 grade — best choice for biaxially oriented, shrink and stretch films, and for coex with LDPE at low temperature. EVOH E44 has a yield strength of 44 MPa (6.38 ksi) and a tensile strength of 55 MPa (7.98 ksi) — weaker than 60% of polymer grades. Elongation at break is 300% and the elastic modulus is 2 GPa (0.29 Msi). EVOH E44 has a density of 1.14 g/cm³ (0.0412 lb/in³), lighter than 60% of polymer grades. Its glass-transition temperature is 55°C (131 °F). E32 is the default condition FabDigit quotes; E44 is available on request or by drawing note.
Advantages
- Conducts heat well — 0.31 W/m·K (0.179 BTU/hr·ft·°F), better than 87% of polymer grades
- Ductile — tolerates forming and impact — 300%, better than 81% of polymer grades
- Tough — resists crack growth — 3.5 MPa·√m (3.19 ksi·√in), better than 81% of polymer grades
- Forms and bends easily — 85/100, better than 81% of polymer grades
Limitations
- Absorbs moisture — dry before molding — 3.5%, worse than 99% of polymer grades
- Needs corrosion protection — 65/100, worse than 86% of polymer grades
EVOH E44 properties
Typical room-temperature values for EVOH E44; 31 are specific to this condition. Other listed values are EVOH reference data and may not represent this condition. Bars are the position among polymer grades.
Physical7
EVOH E44 has a density of 1.14 g/cm³ (0.0412 lb/in³), lighter than 60% of polymer grades. Its glass-transition temperature is 55°C (131 °F).
Mechanical14
EVOH E44 has a yield strength of 44 MPa (6.38 ksi) and a tensile strength of 55 MPa (7.98 ksi) — weaker than 60% of polymer grades. Elongation at break is 300% and the elastic modulus is 2 GPa (0.29 Msi).
Thermal11
EVOH E44 is rated for continuous service to 80°C (176 °F). It conducts heat at 0.31 W/m·K (0.179 BTU/hr·ft·°F), better than 87% of polymer grades. Thermal expansion is 85 µm/m·K (47.2 µin/in·°F).
Electrical3
EVOH E44 has an electrical resistivity of 1×10¹¹ Ω·m.
Chemical & Environmental3
Corrosion resistance is good (65/100), worse than 86% of polymer grades. UV resistance is fair.
Sustainability4
Producing a kilogram of EVOH E44 takes about 90 MJ of energy and emits 4.2 kg of CO₂ — less than 75% of polymer grades. Typical recycled content is 0%.
Manufacturability8
EVOH E44's machinability is good (55/100, worse than 64% of polymer grades); weldability good (60/100); formability excellent (85/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with EVOH E44
Is EVOH easy to machine?
Rarely machined; if a thick coex sheet must be trimmed, use sharp tools and low heat — the resin is notch sensitive when dry and picks up moisture from coolant.
Can EVOH be welded?
Heat-seals and welds readily to itself but not to polyolefins; always use maleic-anhydride-grafted tie layers in coex structures.
Can EVOH be formed, bent or molded?
Dry to <0.1% moisture, extrude at 190–230 °C with streamlined, dead-spot-free flow paths and short residence time to avoid gels and cross-linking; purge with LDPE/EVA at shutdown.
What surface finishes work on EVOH?
Buried as an internal layer, so no surface finishing; surface EVOH would need corona treatment for printing and must be protected from liquid water.
EVOH chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| ethylenemol% of copolymer; grade designation is the ethylene mole fraction | 24 – 48 | 32 |
| residual vinyl acetatesaponification degree normally >99% | 0 – 0.5 | 0.2 |
| stabilizers / lubricantsantioxidant, acid scavenger, boron compounds for gel control | 0 – 1 | 0.3 |
| vinyl alcoholmol%; formed by full saponification of vinyl acetate units | ≥ 52 (balance) | — |
EVOH E44 — frequently asked
What is EVOH E44 used for?
EVOH E44 is typically used for multilayer food packaging film, barrier bottles, co-extruded pouches, fuel tank barrier layers and medical packaging. In short: highest oxygen barrier polymer; coextrusion core layer only; barrier lost when wet.
What is the yield strength of EVOH E44?
EVOH E44 has a typical yield strength of 44 MPa (6.38 ksi) and a tensile strength of 55 MPa (7.98 ksi) — weaker than 60% of polymer grades. Strength varies by condition: see the 11 listed tempers.
Is EVOH E44 easy to machine?
Reasonably — machinability is rated good (55/100, worse than 64% of polymer grades). Rarely machined; if a thick coex sheet must be trimmed, use sharp tools and low heat — the resin is notch sensitive when dry and picks up moisture from coolant.
Can EVOH E44 be welded?
Yes — weldability is rated good (60/100). Heat-seals and welds readily to itself but not to polyolefins; always use maleic-anhydride-grafted tie layers in coex structures.
What surface finishes work on EVOH E44?
Buried as an internal layer, so no surface finishing; surface EVOH would need corona treatment for printing and must be protected from liquid water.
Can EVOH E44 be formed, bent or molded?
Dry to <0.1% moisture, extrude at 190–230 °C with streamlined, dead-spot-free flow paths and short residence time to avoid gels and cross-linking; purge with LDPE/EVA at shutdown.
What is the maximum service temperature of EVOH E44?
EVOH E44 is rated for continuous use to about 80°C (176 °F), and briefly to 130°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between EVOH E32 and EVOH Flex?
E32 is the default condition — default workhorse: best balance of oxygen barrier, processability and cost for film, sheet and bottle coex layers. Flex: for pouches, bag-in-box and vacuum packs that are repeatedly flexed — modified for Gelbo flex durability. Yield strength is 58 MPa in E32 versus 38 MPa in Flex.
Sources
- EVAL EVOH resin grade data and processing guide — Kuraray (EVAL Europe / EVAL Americas) (2023)
- Soarnol EVOH technical data sheets — Mitsubishi Chemical (Nippon Gohsei) (2022)
- Handbook of Plastic Films / Barrier Polymers and Structures — ACS / Rapra (2010)
- EVOH (2026)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.