EMA HMFR
Grade
HMFR = high melt flow (MFR 20–500) hot-melt / masterbatch carrier grade
Use where very low melt viscosity is required: hot-melt adhesives, high-loading pigment carriers, wax blends.
Values for the HMFR condition
Other EMA grades and fills
EMA is listed in 7 conditions; see the grade overview at EMA.
Compare all 7 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
Crosslinkable / chemically foamed EMA compound | For soft closed-cell foams (footwear midsole, gaskets, sports mats) where EVA-like feel with better thermal stability is wanted. | — | 2 | 220 | 9 Shore D |
HMFRThis page High melt flow (MFR 20–500) hot-melt / masterbatch carrier grade | Use where very low melt viscosity is required: hot-melt adhesives, high-loading pigment carriers, wax blends. | 4 | 5 | 550 | 27 Shore D |
Extrusion-coating / tie-layer adhesive resin grade | Select for high-speed extrusion coating and coextrusion bonding to foil, PET, PA, EVOH and paper. | 5 | 8 | 720 | 29 Shore D |
High methyl acrylate (25–35 %), elastomeric soft grade | Pick for maximum softness, tack and polarity — soft-touch films, asphalt/bitumen and rubber-like compounds. | — | 6 | 900 | 22 Shore D |
MA20Default Unfilled natural, medium methyl acrylate (18–24 %), MFR ~6 | General-purpose EMA for tie layers, soft films, hot melts and impact modification. | — | 9 | 750 | 30 Shore D |
Halogen-free flame-retardant EMA compound | EMA-based LSZH cable jacket/insulation compound where 55–65 % mineral loading and V-0 behaviour are required. | 9 | 11 | 160 | 45 Shore D |
Low methyl acrylate (6–12 %), stiffer film/blend grade | Choose when higher stiffness, higher Vicat and better film handling are needed while keeping polarity. | — | 13 | 700 | 42 Shore D |
What is EMA HMFR?
EMA HMFR is EMA in the HMFR grade — use where very low melt viscosity is required: hot-melt adhesives, high-loading pigment carriers, wax blends. EMA HMFR has a tensile strength of 5 MPa (0.725 ksi), weaker than 82% of polymer grades. Elongation at break is 550% and the elastic modulus is 0.02 GPa (0.0022 Msi). EMA HMFR has a density of 0.94 g/cm³ (0.034 lb/in³), lighter than 75% of polymer grades. Its glass-transition temperature is -35°C (-31 °F). MA20 is the default condition FabDigit quotes; HMFR is available on request or by drawing note.
Advantages
- Readily welded — 95/100, better than 99% of polymer grades
- Forms and bends easily — 92/100, better than 97% of polymer grades
- Ductile — tolerates forming and impact — 550%, better than 92% of polymer grades
- Low embodied carbon — 2.6 kg CO₂/kg, better than 89% of polymer grades
- Low moisture uptake — 0.07%, better than 81% of polymer grades
Limitations
- Difficult to machine — 10/100, worse than 100% of polymer grades
- Limited service temperature — 55°C (131 °F), worse than 91% of polymer grades
- Hard to polish — 30/100, worse than 82% of polymer grades
- High mold shrinkage — 2%, worse than 81% of polymer grades
- Low stiffness — 0.02 GPa (0.0022 Msi), worse than 77% of polymer grades
EMA HMFR properties
Typical room-temperature values for EMA HMFR; 24 are specific to this condition. Other listed values are EMA reference data and may not represent this condition. Bars are the position among polymer grades.
Physical7
EMA HMFR has a density of 0.94 g/cm³ (0.034 lb/in³), lighter than 75% of polymer grades. Its glass-transition temperature is -35°C (-31 °F).
Mechanical9
EMA HMFR has a tensile strength of 5 MPa (0.725 ksi), weaker than 82% of polymer grades. Elongation at break is 550% and the elastic modulus is 0.02 GPa (0.0022 Msi).
Thermal10
EMA HMFR is rated for continuous service to 55°C (131 °F). It conducts heat at 0.24 W/m·K (0.139 BTU/hr·ft·°F), better than 67% of polymer grades. Thermal expansion is 200 µm/m·K (111.1 µin/in·°F).
Electrical5
EMA HMFR is an electrical insulator with a dielectric strength of 28 kV/mm (711.2 V/mil) and a resistivity of 1×10¹³ Ω·m.
Chemical & Environmental3
Corrosion resistance is excellent (85/100), better than 65% of polymer grades. UV resistance is fair.
Sustainability4
Producing a kilogram of EMA HMFR takes about 82 MJ of energy and emits 2.6 kg of CO₂ — less than 83% of polymer grades. Typical recycled content is 0%.
Manufacturability8
EMA HMFR's machinability is not recommended (10/100, worse than 100% of polymer grades); weldability excellent (95/100); formability excellent (92/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with EMA HMFR
Is EMA easy to machine?
Rarely machined — too soft and gummy; use sharp die-cutting, water-jet or chilled/cryogenic cutting for film and sheet.
Can EMA be welded?
Excellent heat sealing, impulse and hot-plate welding at 100–160 °C; also bonds well by extrusion lamination without primer.
Can EMA be formed, bent or molded?
Extrudes as blown/cast film, extrusion coating (up to ~315 °C melt, thermally stable, no acetic acid odor) and injection molds at 150–230 °C with cool molds; feed section cooling helps because pellets are tacky.
What surface finishes work on EMA?
Not painted or plated; corona/flame treatment raises surface energy further for printing, and its inherent polarity gives good ink and adhesive anchorage.
EMA 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 |
|---|---|---|
| methyl acrylate (comonomer)MA content defines stiffness, Tm and polarity | 6 – 35 | 21 |
| antioxidant / slip / antiblock additivesgrade-dependent additive package | 0 – 1 | 0.3 |
| ethylenerandom copolymer, high-pressure autoclave/tubular process | balance | — |
EMA HMFR — frequently asked
What is EMA HMFR used for?
EMA HMFR is typically used for multilayer film tie layers, hot melt adhesives, impact modifier additive, foamable compounds and coextruded packaging films. In short: thermally stable EVA alternative; no acetic-acid odor; high-elongation tie-layer resin.
What is the tensile strength of EMA HMFR?
EMA HMFR has a typical tensile strength of 5 MPa (0.725 ksi) — weaker than 82% of polymer grades. Strength varies by condition: see the 7 listed tempers.
Is EMA HMFR easy to machine?
Not especially — machinability is rated not recommended (10/100, worse than 100% of polymer grades). Rarely machined — too soft and gummy; use sharp die-cutting, water-jet or chilled/cryogenic cutting for film and sheet.
Can EMA HMFR be welded?
Yes — weldability is rated excellent (95/100). Excellent heat sealing, impulse and hot-plate welding at 100–160 °C; also bonds well by extrusion lamination without primer.
What surface finishes work on EMA HMFR?
Not painted or plated; corona/flame treatment raises surface energy further for printing, and its inherent polarity gives good ink and adhesive anchorage.
Can EMA HMFR be formed, bent or molded?
Extrudes as blown/cast film, extrusion coating (up to ~315 °C melt, thermally stable, no acetic acid odor) and injection molds at 150–230 °C with cool molds; feed section cooling helps because pellets are tacky.
What is the maximum service temperature of EMA HMFR?
EMA HMFR is rated for continuous use to about 55°C (131 °F), and briefly to 85°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between EMA MA20 and EMA FR-ATH?
MA20 is the default condition — general-purpose EMA for tie layers, soft films, hot melts and impact modification. FR-ATH: eMA-based LSZH cable jacket/insulation compound where 55–65 % mineral loading and V-0 behaviour are required.
Sources
- Optema EMA copolymer resins — product data — ExxonMobil Chemical (2022)
- Elvaloy AC ethylene methyl acrylate copolymers — Dow (formerly DuPont) (2021)
- ASTM D1238 — Melt Flow Rates of Thermoplastics by Extrusion Plastometer — ASTM (2020)
- ASTM D638 / D882 — Tensile properties of plastics and thin sheeting — ASTM (2022)
- Engineered Materials Handbook Vol.2: Engineering Plastics — ASM International (1988)
- CAMPUS / UL Prospector ethylene copolymer datasheets — CWFG / UL (2024)
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.