| HS Code | 233508 |
| Vinyl Acetate Content | 50 wt% |
| Melt Index | 8 g/10 min at 190°C/2.16 kg |
| Density | 0.994 g/cm³ |
| Peak Melting Temperature | 52 °C |
| Glass Transition Temperature | -70 °C |
| Crystallinity | Low, approximately 5% |
| Tensile Strength | 6.5 MPa |
| Elongation At Break | 400% |
| Hardness | 75 Shore A |
| Physical Form | Pellets |
| Color | White to translucent |
| Odor | Slight characteristic odor |
| Water Solubility | Insoluble |
| Solvent Solubility | Soluble in aromatic and chlorinated hydrocarbons |
As an accredited ELEVATE EB508 Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ELEVATE EB508 Ethylene Vinyl Acetate Copolymer is supplied as pellets in 25 kg polyethylene bags, palletized and shrink-wrapped for safe transport. |
| Container Loading (20′ FCL) | 20′ FCL: 20-foot container loaded with palletized bags of ELEVATE EB508 EVA copolymer, secured for safe transit. |
| Shipping | ELEVATE EB508 Ethylene Vinyl Acetate Copolymer ships as solid pellets in moisture-resistant bags or bulk containers. Keep dry, avoid direct sunlight, and store below recommended temperatures. Load securely in clean, covered transport. No hazardous classification generally, but follow standard industrial hygiene and safe handling practices. |
| Storage | Store ELEVATE EB508 Ethylene Vinyl Acetate Copolymer in a cool, dry, well-ventilated area away from direct sunlight, heat, sparks, and open flames. Keep containers tightly closed when not in use. Avoid contact with strong oxidizers and incompatible materials. Maintain moderate temperatures to prevent degradation, and follow all local regulations for safe handling and storage. |
| Shelf Life | Store in original sealed packaging, away from heat and sunlight. Shelf life is two years from manufacture date. |
ELEVATE EB508 functions as the vinyl acetate-rich backbone in packaging hot-melt systems where a nominal comonomer content of 28 wt% and a melt flow index of 8 g/10 min measured under ISO 1133-1:2022 at 190 °C/2.16 kg depress crystallinity and extend open time without reducing shear adhesion below the threshold required for case closure. In production formulations, EB508 is metered at 20–40 wt% of total adhesive mass, while rosin ester or hydrogenated hydrocarbon tackifier constitutes 35–50 wt%, paraffin or Fischer-Tropsch wax 5–20 wt%, antioxidant 0.2–0.8 wt%, and optional liquid plasticizer 0–5 wt%. Regulatory compliance for food-contact carton and case sealing is anchored to 21 CFR 175.105 for adhesive components separated by a functional barrier, with European formulations additionally evaluated under REACH (EC) No 1907/2006 Annex XVII for restricted substances and under Regulation (EU) No 10/2011 when direct migration cannot be excluded. Melt compounding is conducted in oil-heated sigma-blade mixers jacketed at 150–180 °C with a nitrogen blanket to limit oxidative viscosity drift, then discharged through a strand pelletizer; continuous operations use a co-rotating twin-screw extruder with L/D 36:1, barrel set points between 140 °C and 170 °C, and melt filtration through 100–200 mesh breaker plates. Application viscosity at 160–180 °C typically falls in the range of 500–1,500 mPa·s on a Brookfield thermosel, permitting roller or slot-die application at 1–3 g/m coat weight. Terminal product types include corrugated case and carton sealing, bookbinding spine adhesives, label stock laminating adhesives, and profile wrapping adhesives for furniture edge banding, where open time under ASTM D4497 and shear strength under ASTM D4498 are the governing quality-control metrics.
Compounding of EVA foam for compression-molded midsoles is initiated by dry-blending ELEVATE EB508 with a lower-VA EVA grade to reduce hardness and widen the foaming plateau. EB508 is charged at 15–35 wt% of the polymer phase, while azodicarbonamide blowing agent is dosed at 2.5–5.0 parts per hundred resin, dicumyl peroxide at 0.7–1.2 phr, zinc oxide at 1.0–3.0 phr, stearic acid at 0.5–1.5 phr, and optional calcium carbonate filler at 0–15 phr. Mixing on an intermeshing internal mixer with a ram pressure of 0.6 MPa and rotor speed of 30–45 rpm proceeds for 8–12 min at 110–130 °C, after which the batch is dropped below 125 °C to prevent premature dicumyl peroxide decomposition; the stock is then sheeted on a two-roll mill, cooled, and pelletized. Foam expansion is carried out in multi-cavity compression presses at 155–165 °C with 12–18 MPa clamp pressure for 8–12 min, giving densities from 0.12 g/cm³ to 0.25 g/cm³ when measured according to ISO 845:2006. Terminal products include athletic midsoles, orthotic insoles, EVA sheets, flip-flop soles, and thermoformed footbed components, with compression set tested under ISO 815-1:2012 at 50% deformation and phthalate compliance checked against REACH Annex XVII Entry 51 and Entry 52.
In low-smoke zero-halogen wire and cable jacketing, ELEVATE EB508 functions as the polar compatibilizing resin that permits high loadings of aluminum trihydroxide and magnesium dihydroxide without melt fracture during crosshead extrusion. The polymer fraction is constructed with EB508 at 10–30 wt% of total polymer, the balance being LDPE or LLDPE, while total filler loading is held between 150 phr and 180 phr, supplemented by magnesium dihydroxide at 10–20 phr, zinc borate at 5–10 phr, processing aid at 1–3 phr, and hindered phenolic antioxidant at 0.5–1.5 phr. Compounding is executed on a co-rotating twin-screw extruder with L/D 44:1, atmospheric and vacuum venting, and a side-stuffer for filler introduction; barrel temperatures are set from 120 °C to 170 °C, while melt temperature at the die face is held below 165 °C to avoid releasing water of hydration from ATH. Screw speed is maintained at 280–350 rpm and specific energy input at 0.18–0.22 kWh/kg to disperse filler to a maximum agglomerate size below 25 µm without degrading the EVA phase. Jacketing is then applied on a single-screw extruder with 90 mm diameter and 20:1 L/D, tube-on crosshead tooling, melt temperature of 140–160 °C, and pressure at the breaker plate of 80–150 bar. Terminal products include building wire sheathing, control cable jackets, railway rolling-stock cables, and data-cable outer sheaths requiring halogen-free performance. The compliance matrix governing these compounds is shown below.
| Requirement | Test Method | Acceptance Criterion |
|---|---|---|
| Halogen acid gas content | IEC 60754-1 | ≤0.5% by mass |
| Gas acidity | IEC 60754-2 | pH ≥4.3, conductivity ≤10 µS/mm |
| Smoke density | IEC 61034-2 | ≥60% light transmittance |
| Oxygen index | ISO 4589-2 | ≥30% |
| Tensile strength | IEC 60811-501 | ≥9.0 MPa |
| Elongation at break | IEC 60811-501 | ≥125% |
| Heavy metals | RoHS Directive 2011/65/EU Annex II | Not detected above maximum concentration values |
Polyolefin masterbatch carriers reach maximum letdown efficiency only when the carrier resin maintains a lower crystallinity boundary than film-grade LDPE while retaining enough pellet hardness to prevent blocking during silo storage. ELEVATE EB508 is charged at 50–75 wt% of masterbatch mass, with pigment at 20–40 wt%, wax or metal soap dispersant at 5–15 wt%, and optional LLDPE viscosity modifier at 0–10 wt%. The downstream production process consists of pre-blending in a low-speed ribbon blender, feeding through a twin-screw extruder with L/D 36:1, side-feeding pigments at 150–190 °C, devolatilizing at -0.08 MPa, and strand pelletizing through a water bath. Terminal product types include PE blown film, HDPE injection molded packaging, extrusion coating, and drip irrigation pipe, with let-down ratios of 2–6% in film grades and 1–3% in injection grades. Compliance for general industrial masterbatch falls under REACH (EC) No 1907/2006, RoHS Directive 2011/65/EU Annex II, and for food-contact end uses under Regulation (EU) No 10/2011 with overall migration limited to 10 mg/dm².
At polymer loadings above 7 wt%, phase inversion in EVA-modified bitumen becomes difficult to control without sulfur vulcanization or reactive-grade maleic anhydride grafting. ELEVATE EB508 is therefore incorporated at 3–7 wt% of bitumen mass to raise the softening point, increase elastic recovery, and reduce high-temperature rutting susceptibility while retaining storage stability. The production process uses a high-shear rotor-stator colloid mill at 180–205 °C with recirculation for 60–120 min, followed by transfer into vertical storage tanks with low-speed agitation at 1–5 rpm to limit polymer-rich layer formation. Terminal products include polymer-modified bituminous waterproofing membranes, road paving binder for heavy-traffic asphalt concrete, and bituminous crack sealants. Compliance is evaluated under EN 14023 for polymer-modified bitumen, ASTM D5976 for homogeneity and storage stability, and ASTM D36 for ring-and-ball softening point. Published data for phase-separation kinetics in EB508-specific asphalt blends is limited, so plant trials should include top-to-bottom softening point difference after 72 h at 180 °C.
Solvent-free sealant systems require reduced complex viscosity at application temperature and high cohesive strength after cooling, conditions met when ELEVATE EB508 is blended as the polar modifier at 10–30 wt% of total formulation. The remaining composition includes APAO or polyisobutylene at 10–25 wt%, hydrocarbon resin at 20–35 wt%, calcium carbonate or talc filler at 20–40 wt%, and naphthenic oil at 2–5 wt%. Production is performed in a continuous twin-screw kneader at 120–150 °C with vacuum devolatilization below -0.09 MPa, followed by cartridge filling or sausage packaging at 90–110 °C. Terminal products include industrial joint sealants, elastic glazing compounds, bedding sealants for precast concrete, and vibration-damping sealants. Compliance is verified under ISO 11600 classification requirements and ASTM C920, with volatile organic content limited to ≤20 g/L where low-emission site specifications apply.
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ELEVATE EB508 is an ethylene-vinyl acetate copolymer supplied as pellets for film, foam, masterbatch, and injection-moulded sealing applications. The grade designation identifies a nominal vinyl acetate content of 18 wt% and a melt mass-flow rate of 8.0 g/10 min measured in accordance with ASTM D1238-20 at 190 °C under 2.16 kg. The density of the unfilled copolymer is typically 0.938 g/cm³ when tested per ISO 1183-1:2019. These specification anchors distinguish EB508 from lower-flow EVA grades used in blown film and from higher-vinyl-acetate grades used in hot-melt adhesives; the 18 wt% VA level moderates crystallinity and surface polarity while retaining sufficient melt strength for profile and foam processes.
The tabulated values are representative for EVA copolymers of this nominal composition class. They are not lot-specific acceptance limits; release properties should be confirmed against the supplier certificate of analysis and the applicable technical data sheet before process parameters are fixed.
| Property | Test method | Unit | Representative range |
|---|---|---|---|
| Vinyl acetate content | ASTM D5594-21 | wt% | 18.0 |
| Melt mass-flow rate | ASTM D1238-20, 190 °C, 2.16 kg | g/10 min | 8.0 |
| Density | ISO 1183-1:2019 | g/cm³ | 0.938 |
| Tensile strength at break | ISO 527-2:2012 | MPa | 9.0–11.0 |
| Elongation at break | ISO 527-2:2012 | % | 700–850 |
| Vicat softening temperature | ISO 306:2022 A50 | °C | 52–60 |
| Peak melting temperature | ISO 11357-3:2018 | °C | 80–85 |
The presence of 18 wt% vinyl acetate disrupts polyethylene crystallinity. Differential scanning calorimetry under ISO 11357-3:2018 places the peak melting endotherm at 80–85 °C, compared with 106–112 °C for a low-density polyethylene of similar melt index. This depression of crystalline order allows EB508 to be heat-sealed on conventional sealing equipment at approximately 70–80 °C, whereas LDPE sealants typically require 95–105 °C under ASTM F2029-16 conditions of 0.5 s dwell and 0.15 MPa jaw pressure.
The acetate side groups also raise polarity. The consequence is improved wetting and adhesion on corona-treated polyethylene, aluminium foil, and poly(ethylene terephthalate) relative to non-polar LDPE, but the reverse side is swelling in polar solvents. Immersion testing in toluene at 23 °C for 24 h per ISO 175:2010 typically produces mass uptake above 8 wt% for this copolymer class, which is significantly higher than LDPE. Designers of gaskets, seals, and automotive trim must therefore avoid continuous contact with aromatic hydrocarbons, ketones, and chlorinated solvents; published data for EB508 in fuel-contact service is limited, and application-specific compatibility testing is required.
Rheologically, the 8.0 g/10 min MFR corresponds to a medium-viscosity melt. Capillary rheometry at 190 °C under ISO 11443:2021 generally places apparent shear viscosity between 650 Pa·s and 780 Pa·s at 100 s-1, although grade-specific lot data should be used for die design. The value is low enough to permit high-filler loading in twin-screw compounding, yet high enough to maintain bubble stability in cast film and sheet lines at moderate draw ratios.
Compounding trials on a 40:1 L/D co-rotating twin-screw extruder with vacuum venting have shown that EB508 reaches stable melt pressure when barrel zones are set from feed to die as 130 °C, 160 °C, 180 °C, and 190 °C. Screw speed for a 50 mm extruder can be held between 250 rpm and 450 rpm, with specific energy input near 0.16–0.20 kWh/kg. Die melt temperature should remain below 225 °C; deacetylation of the vinyl acetate function becomes measurable above 230 °C, releasing acetic acid and producing conjugated unsaturation that darkens the melt and accelerates corrosion on downstream rolls and calender surfaces.
The venting port must be maintained at -0.07 MPa to -0.09 MPa gauge to remove low-molecular-weight volatiles. Predrying in a desiccant dryer at 60 °C for 4 h is recommended when storage relative humidity exceeds 60%; although the equilibrium moisture absorption of EVA is generally below 0.2 wt% at 23 °C and 50% RH, surface moisture on cold pellets can create surface voids in profile sections.
In injection moulding, barrel settings of 160–200 °C and mould temperatures of 10–40 °C are commonly used. Clamp force requirements typically fall between 3.5 kN and 4.5 kN per square centimetre of projected area for short-flow sealing parts. Residence time above 200 °C should not exceed 15 min; during start-up and shutdown, purging with a low-MI polyethylene of similar density is required to avoid stagnant melt degradation.
Blends with fillers should avoid basic residues that catalyse ester hydrolysis. Calcium carbonate at 20–40 phr does not normally require acid neutralization, but untreated zinc oxide and strongly alkaline additives are incompatible in prolonged high-shear compounding because they can accelerate vinyl acetate cleavage. Antioxidant packages based on hindered phenols and phosphites are effective; amine-based stabilizers are not normally required and may interact with the acetate moiety during long thermal ageing.
For crosslinked foam formulations, dicumyl peroxide half-life temperature sensitivity must be matched to the EVA melt temperature. Dicumyl peroxide exhibits a half-life of approximately 1 min at 170 °C; this creates a narrow processing window with azodicarbonamide, whose gas evolution begins near 195 °C. Control of die pressure and calibration vacuum is therefore critical in EB508 foam sheet lines. The grade is typically processed at melt temperatures below 220 °C so that peroxide cure kinetics and gas expansion remain separable.
When EB508 replaces a low-MI LDPE sealant resin, the primary benefits are lower heat-seal initiation temperature, improved low-temperature flex-cracking resistance, and higher filler acceptance. The primary limitations are lower modulus, higher gas permeability, and reduced resistance to non-polar solvents. The difference in seal initiation is measurable by ASTM F2029-16; typical EB508 films seal at 70–80 °C on 50 µm gauge, whereas LDPE of equivalent density seals at 95–105 °C. For frozen-food packaging, the lower seal initiation permits faster packaging-line sealing speeds without increasing dwell time.
The substitution is not always advantageous. Oxygen transmission rate increases with vinyl acetate content; when measured at 23 °C and 0% RH under ASTM D3985-17, EVA copolymer cast films can show oxygen permeability 30–50% higher than comparable LDPE film. Carbon dioxide permeability also rises, which must be considered in modified-atmosphere packaging.
Compared with a 2.0 g/10 min low-VA EVA used in film, EB508 offers better filler acceptance and lower extruder torque, but lower bubble stability in blown-film. If blown-film lines are operated with a die gap below 0.8 mm, the reduced melt strength may require lower blow-up ratios and higher frost-line cooling to avoid bubble chatter. Conversely, in cast film and extrusion coating, the higher flow rate improves web edge stability and draw-down at line speeds above 150 m/min.
Compared with ethylene-butyl acrylate copolymers of similar melt index, EB508 provides higher polar contribution from the shorter acetate side group, but the vinyl acetate group has lower thermal stability than butyl acrylate. In processes requiring sustained exposure above 230 °C, an EBA copolymer or a thermally stabilized EVA grade may be considered; published data for EB508 under prolonged high-temperature residence is limited.
| Parameter | EB508 | Low-VA EVA | High-VA EVA | LDPE |
|---|---|---|---|---|
| Nominal vinyl acetate content | 18 wt% | 9–14 wt% | 25–28 wt% | — |
| Melt mass-flow rate | 8.0 g/10 min | 0.7–3.0 g/10 min | 6–25 g/10 min | 2–8 g/10 min |
| Peak melting temperature | 80–85 °C | 95–105 °C | 60–75 °C | 106–112 °C |
| Heat seal initiation | 70–80 °C | 85–95 °C | 55–65 °C | 95–105 °C |
| Flexural modulus | 60–100 MPa | 100–200 MPa | <50 MPa | 200–300 MPa |
Compliance status for food-contact, medical, and electrical applications must be verified against the specific grade lot and the applicable supplier technical data sheet. EVA copolymers with vinyl acetate content up to 18 wt% may be used in food-contact materials when the formulation complies with 21 CFR 177.1350, subject to total extractives limits and end-use conditions defined in 21 CFR 176.170. For European Union food-contact use, vinyl acetate migration must not exceed the specific migration limit of 12 mg/kg food or food simulant under Regulation (EU) 10/2011.
The product does not intentionally contain lead, mercury, cadmium, or hexavalent chromium above RoHS Directive 2011/65/EU threshold concentrations. REACH registration for ethylene and vinyl acetate monomers is typically managed by the monomer producers; downstream compounders must assess any additives introduced during conversion. No organotin heat stabilizers are required in EVA conversion, and the material is not classified as a hazardous substance under CLP for the supplied pellet form, but degradation products formed above 230 °C include acetic acid and are irritating to the respiratory tract.
For masterbatch carrier applications, the 8.0 g/10 min MFR allows carbon black loadings of 20–40 wt% to be dispersed in a 40:1 L/D twin-screw extruder while holding melt temperature below 220 °C. Let-down ratios of 20:1 to 40:1 in polyolefin conversion require the carrier resin to be matched to the downstream matrix; EB508 is therefore not recommended for high-density polyethylene film grades where a stiffer, lower-MI carrier such as a 2.0 g/10 min LLDPE would maintain modulus. Published data for EB508 dispersion in nanofiller systems is limited; pilot-scale trials are required before specifying the grade in critical barrier or conductive compounds.
