| HS Code | 318227 |
| Product Name | ELVAX CE9619-1 |
| Chemical Family | Ethylene Vinyl Acetate Copolymer |
| Cas Number | 24937-78-8 |
| Physical Form | Pellets |
| Vinyl Acetate Content | 19 wt% |
| Melt Flow Index | 2.5 g/10 min at 190°C, 2.16 kg |
| Density | 0.938 g/cm³ |
| Melting Point | 88°C (DSC) |
| Tensile Strength At Break | 16 MPa |
| Elongation At Break | 800% |
| Shore Hardness | 92 Shore A |
| Vicat Softening Point | 52°C |
| Brittleness Temperature | -76°C |
As an accredited ELVAX CE9619-1 Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ELVAX CE9619-1 ethylene vinyl acetate copolymer supplied as pellets in 25 kg multi-wall paper bags, ready for processing. |
| Container Loading (20′ FCL) | 20′ FCL container loading of ELVAX CE9619-1: palletized bags, secure bracing, dry and ventilated, avoiding heat and pressure damage. |
| Shipping | ELVAX CE9619-1 is a non-hazardous ethylene vinyl acetate copolymer supplied as solid pellets. Ship in sealed polyethylene-lined bags or fiber drums to prevent moisture absorption. Store in a cool, dry area away from ignition sources and extreme heat. No UN classification required; standard dry cargo handling applies. |
| Storage | Store ELVAX CE9619-1 in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep containers tightly closed when not in use to prevent contamination and moisture uptake. Avoid dust accumulation, and keep away from strong oxidizers. Follow manufacturer’s shelf-life and handling recommendations. |
| Shelf Life | Shelf life is typically two years from manufacture date when stored in original, unopened containers under cool, dry conditions. |
In hot-melt adhesive compounding for case and carton sealing, ELVAX CE9619-1 is incorporated at 15–35 wt% as the principal elastic and cohesive phase, with rosin ester or hydrogenated hydrocarbon tackifier resins at 35–55 wt% and paraffin or Fischer-Tropsch wax at 10–30 wt%. The compounding sequence is executed in a jacketed sigma-blade kneader at 20–50 rpm or a corotating twin-screw extruder with an L/D ratio of 40:1 and barrel zones between 130 °C and 160 °C. Melt viscosity is recorded at 180 °C with a Brookfield Thermosel using spindle SC4-27 according to ASTM D3236-15; the target viscosity for wheel and slot-die application is typically 800–2,500 mPa·s. The open time and fibre-tear percentage on corrugated linerboard are evaluated by a heat-seal peel method based on ASTM D1876-08 with a 25 mm T-peel specimen, while heat resistance is assessed by shear adhesion failure temperature under ASTM D4498-07. Tackifier resin softening points between 85 °C and 105 °C, measured by ring-and-ball under ASTM D36-14, balance open time and hot-tack; lower softening points extend open time but reduce SAFT. Hindered phenolic primary antioxidants at 0.2–0.5 wt% and phosphite secondary antioxidants at 0.1–0.3 wt% are added to suppress chain scission, and the premelt tank is blanketed with nitrogen at 0.02 MPa overpressure to reduce oxidative skin formation. The adhesive must remain stable for 24 h at 175 °C with viscosity drift below 10% of the initial reading; prolonged exposure above 180 °C causes thermal elimination of acetic acid from the vinyl acetate comonomer, leading to gel specks, darkening, and loss of peel adhesion. Formulation with rosin esters of acid number above 15 mg KOH/g intensifies polar interaction with the acetate moiety and can shift the tackifier-polymer phase boundary, yielding surface bloom on the adhesive bead. For food packaging, 21 CFR 175.105 governs the adhesive, while the EVA component itself is referenced under 21 CFR 177.1350, with migration limits determined for the specific substrate and coat weight.
| Property | Standard designation | Test condition or equipment |
|---|---|---|
| Melt mass-flow rate | ISO 1133-1:2022 | 190 °C, 2.16 kg |
| Density | ASTM D792-20 | Analytical balance with immersion kit |
| Tensile properties | ASTM D638-14 | Type IV die, 50 mm/min |
| Glass transition and melting | ASTM D3418-21 | DSC at 10 °C/min |
| Shore A hardness | ISO 868:2003 | Durometer after 15 s dwell |
| Ring-and-ball softening point | ASTM D36-14 | Glycerol bath, 5 °C/min |
When ELVAX CE9619-1 is selected for silane-grafted or peroxide-cured halogen-free flame-retardant cable jacketing, the main process boundary is the high metal hydrate loading required to pass IEC 60332-1-2:2015 single-wire flame propagation. Aluminum trihydroxide or magnesium dihydroxide is added from 120 phr to 180 phr against 100 phr of the base resin, with vinyl silane coupling agent at 0.5–1.0 phr. The compound is produced on a co-rotating twin-screw extruder with 36:1 L/D and side-stuffer injection after polymer plastication, using screw speeds of 250–450 rpm. The die melt temperature is held between 140 °C and 160 °C because vinyl acetate decomposition accelerates above 190 °C, releasing acetic acid that corrodes vacuum pump seals and deposits at the die lip. Filler moisture must be reduced to less than 0.1 wt% by dehumidifying at 80 °C for 4 h when ambient relative humidity exceeds 60%; otherwise the strand develops internal porosity. Before cable extrusion, granulated compound is dried to less than 0.05 wt% moisture, and capillary rheometry at 190 °C with an L/D 30:1 die is used to establish shear viscosity below the extruder drive limit. Tensile strength and elongation at break are measured according to IEC 60811-501:2012 on unaged and aged slabs; elongation retention after oven ageing for 168 h at 136 °C is the primary acceptance criterion. Limiting oxygen index is tested under ISO 4589-2:2017, and the compound is formulated to exceed 30% O₂ where cable standards require it. The practical upper filler limit is often reached not by flame performance but by granulation and cable extrusion smoothness; metal hydrate loadings above 170 phr can cause screw torque spikes and poor low-temperature jacket flexibility. Plasticizer content such as paraffinic process oil above 5 phr should be excluded because it migrates to the jacket surface and lowers flame resistance. Metal stearate processing aids above 1.5 phr should also be avoided because they can reduce filler-matrix adhesion and cause surface exudation on the finished cable.
For carbon black and organic pigment masterbatch production, ELVAX CE9619-1 is pre-blended at 30–60 wt% with the pigment and a low-molecular-weight polyethylene wax before feeding to a co-rotating twin-screw extruder with 44:1 L/D and a vacuum vent at -0.08 MPa. The barrel profile is set from 90–110 °C in the feed section to 120–150 °C in the kneading blocks and 140 °C at the die. Dispersive mixing is generated by 90° staggered kneading discs at screw speeds of 300–600 rpm; filter pressure rise across a 20 µm screen pack is recorded as an agglomerate index, and the run is paused if the rise exceeds 0.15 MPa over 2 h. Melt mass-flow rate after compounding is verified under ISO 1133-1:2022 at 190 °C and 2.16 kg. The concentrate is let down at 2–5 wt% into polyolefin or engineering film grades, where the final pigment dispersion is assessed by optical microscopy at 100× on a 10 µm microtome section. Carbon black loading above 40 wt% often exceeds the drive torque limit of 45 kW on laboratory twin-screw lines; production-scale trials use 75 kW or larger motors with water-cooled barrels. If organic pigments are hygroscopic, the pigment must be pre-dried to 0.1 wt% residual moisture at 70 °C for 2 h before the extrusion run; failure to do so generates splay marks and microvoids in molded parts. The resin’s polar vinyl acetate units wet pigment surfaces more efficiently than low-VA carriers, but the same polarity increases water uptake if the masterbatch is stored unwrapped at 80% RH for more than 12 h. Masterbatches based on this carrier are not recommended for nylon or polycarbonate because residual acetate groups can catalyze hydrolysis or transesterification during melt processing at temperatures above 260 °C.
The conversion of paraffin wax into investment casting pattern compound begins with dissolution of ELVAX CE9619-1 at 110–130 °C in an oil-heated, low-shear propeller mixer. The resin is charged at 2–8 wt% together with paraffin, microcrystalline wax, and a rosin or hydrocarbon tackifier; mixing continues under vacuum to remove entrained air. The EVA phase increases the ring-and-ball softening point measured according to ASTM D36-14 and reduces brittle fracture at thin trailing edges and fillets. Viscosity is monitored at 100 °C with a rotational viscometer using spindle SC4-27, because injection pattern dies require a precise melt flow window for filling wall sections below 3 mm. The compound is injected at 60–65 °C under holding pressure of 0.2–0.5 MPa, and dimensional stability is checked by linear shrinkage testing according to ASTM D2566-14. Thermal expansion is measured by thermomechanical analysis at 5 °C/min from 20 °C to 65 °C to avoid shell cracking during autoclave removal. The EVA modification reduces crystalline wax contraction, but resin loadings above 10 wt% leave carbonaceous residue after burn-out and can lower ceramic shell permeability. Thermogravimetric analysis at 750 °C in air is used to determine total organic residue; foundry specifications generally require less than 0.05 wt% ash. Published data for this specific CE9619-1 grade in all investment casting pattern formulations is limited, so a full plant-scale trial covering dewaxing, flashing, and shell build is required before substitution of an established pattern modifier.
Photovoltaic encapsulant film requires the EVA resin to be compounded with 0.8–1.5 phr of a peroxide crosslinking initiator, 0.3–0.5 phr of a silane adhesion promoter, and UV-stabilizer packages before chill-roll casting at 80–110 °C. The sheet is then laminated in a vacuum laminator at 145–155 °C with applied pressure of 0.08–0.10 MPa for 12–18 min. Gel content after lamination is measured by xylene extraction under ASTM D2765-16; values below 70% indicate incomplete network formation and increased creep at module operating temperatures above 85 °C. Optical transmittance is evaluated by IEC 62788-1-4:2020 with an integrating sphere, and yellowness index after 1,000 h of damp-heat ageing at 85 °C/85% RH is measured under ASTM E313-20. The main long-term failure mechanism is hydrolysis of residual vinyl acetate groups, which releases acetic acid that corrodes solder-coated copper ribbon and increases potential-induced degradation. For this reason the stabilizer system must include an acid scavenger and the lamination residence time must be sufficient to decompose the peroxide completely; residual peroxide above 0.1 phr after cure accelerates oxidative yellowing. Acid scavenger adequacy is evaluated by exposing glass–encapsulant laminates to 2,000 h at 85 °C and 85% RH and then measuring surface resistivity decline. The resin must also have a low gel count; a 50 µm melt filter before the casting die is used to remove fisheyes that would create optical defects. Film thickness is held at 0.45–0.50 mm using gravimetric dosing and beta-gauge scanning. The manufacturer’s datasheet for CE9619-1 should be checked for peroxide cure compatibility and gel specification because not all EVA grades are approved for photovoltaic encapsulant service.
In extrusion coating of paper, aluminum foil, or polyester, ELVAX CE9619-1 is processed on a single-screw extruder with 30:1 L/D and a coat-hanger die; barrel temperatures are profiled from 120 °C at the feed throat to 220 °C at the die, with the final die temperature capped below 230 °C to suppress vinyl acetate decomposition. The substrate web is corona-treated at 0.8–1.2 kW·min/m² immediately before the nip to improve adhesion to aluminum foil and polyester. Coat weight is controlled between 15 g/m² and 40 g/m² by adjusting screw speed and line haul-off. The air gap is kept below 150 mm and purged with nitrogen at 0.5 m³/h to reduce melt-surface oxidation. Heat-seal initiation temperature is determined under ASTM F2029-16 by sealing coated foil to uncoated foil at 0.3 MPa for 0.5 s; T-peel bond strength is measured under ASTM D1876-08 with a 25 mm specimen. Edge neck-in must be controlled because the molten EVA curtain has limited melt strength at high temperature; coating above 60 g/m² is not recommended on narrow dies without edge encapsulation. Moisture in the resin must be below 0.1 wt%; if storage at 60% RH or higher for more than 24 h occurs, the resin is pre-dried at 70 °C for 2 h in a desiccant hopper. The resulting seal is used on aseptic beverage cartons and medical lidding, where post-sterilization peel strength of 1.5–2.0 kg/25 mm is required. For aseptic packaging, the finished laminate must also pass ASTM F88/F88M-21 burst and seal-strength testing after hydrogen peroxide sterilization.
EVA foam midsole compounding for injection molding uses a two-stage process in which ELVAX CE9619-1 is first blended in a high-speed mixer with azodicarbonamide blowing agent at 2.5–4.0 phr, dicumyl peroxide at 0.6–1.2 phr, zinc oxide at 1.0–2.0 phr, stearic acid at 0.5–1.0 phr, and calcium carbonate filler at 10–30 phr. The blend is then melted in a twin-roll mill at 90–110 °C to form a sheet, calendered, and pelletized. Moving die rheometer data at 170 °C are used to confirm torque minimum, scorch time above 60 s, and optimum cure time before production injection molding; compounds with scorch time below 30 s are rejected for premature crosslinking in the barrel. Injection molding is run with barrel temperatures from 100 °C to 120 °C and mold temperatures from 165 °C to 180 °C; clamp force on large midsole molds reaches 250–400 t. Expansion ratio is controlled by shot size and cavity fill between 50% and 80%; final density is measured by ASTM D792-20 and Shore Asker C hardness by ISO 868:2003. The crosslinking and blowing reactions compete during the heating cycle; dicumyl peroxide decomposition must overlap with gas generation. If the mold temperature is below 160 °C, the foam collapses due to premature cell rupture, whereas above 190 °C acetic acid release from the vinyl acetate comonomer creates yellowing and surface tack. Cell uniformity is inspected by cutting a cross-section and measuring average cell diameter below 0.5 mm; excessive moisture above 0.1 wt% in the compound causes irregular gas pockets. The final midsole is typically assembled with a rubber outsole, and its compression set is measured under ASTM D395-18, Method B, after 22 h at 70 °C at 25% deflection; specifications commonly require less than 25% permanent set. The compound also must pass flex-crack resistance testing under ASTM D1052-09 for 100,000 cycles at 23 °C to prevent early sole failure in athletic footwear.
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ELVAX CE9619-1 Ethylene Vinyl Acetate Copolymer is a pelletized ethylene-vinyl acetate copolymer supplied under the DuPont ELVAX trademark. Supplier technical literature identifies the grade as having a nominal vinyl acetate comonomer content of 28 wt% by ISO 8985, a nominal melt mass-flow rate of 6 g/10 min at 190°C under 2.16 kg load by ISO 1133-1:2022, and a nominal density of 0.950 g/cm³ by ISO 1183-1. The resin is stabilized against oxidative degradation during compounding and storage, but the exact additive package and lot-specific values must be confirmed against the certificate of analysis. Its comonomer content places it in the polar, flexible segment of ethylene copolymers; the material is therefore specified for hot-melt adhesive compounding, wax-based coating modification, polymer modification, and extrusion laminating where adhesion to polar substrates and low-temperature flexibility are process requirements.
The 28 wt% vinyl acetate content disrupts polyethylene crystallinity by shortening methylene sequences and introducing acetate side groups. Differential scanning calorimetry under ISO 11357-3 typically shows a broad crystalline melting peak in the 65–75°C range for this comonomer level, compared with a melting peak above 90°C for a 12 wt% VA grade. The reduced crystallinity lowers the Vicat softening point to approximately 60°C or below and reduces tensile modulus; under ISO 527-2, a 28 wt% VA ethylene copolymer typically exhibits a secant modulus below 50 MPa, whereas a 12 wt% VA grade may exceed 80 MPa. The acetate group also increases polarity, improving compatibility with rosin ester tackifiers, pentaerythritol tetraesters, and partially hydrogenated wood rosins. The same polarity increases equilibrium moisture sorption relative to low-VA EVA; pellets stored at relative humidity above 60% can pick up sufficient surface moisture to require pre-drying before extrusion. These molecular differences are the basis for product substitution decisions: CE9619-1 is selected over low-VA grades where adhesion to aluminium, polyester, or paper fibres is more important than stiffness, heat resistance, or moisture-barrier performance.
In hot-melt adhesive production, the resin is compounded in heavy-duty sigma-blade mixers or planetary mixers at jacket temperatures of 150–180°C. In a 40:1 L/D co-rotating twin-screw extruder, a typical barrel profile runs from 140°C in the feed zone to 190°C at the die, with melt temperature held below 230°C. The thermal stability limit is not an arbitrary value; vinyl acetate sequences begin acetic acid elimination at elevated temperature, and production lines that exceed 230°C for more than 10 min often observe viscosity drift, gas generation, and corrosion pitting on unplated screw and barrel surfaces. For formulation monitoring, melt viscosity is checked by a Brookfield viscometer at 180°C; a typical carton-sealing hot melt based on 30–35 wt% CE9619-1, a compatible tackifier, and 20–30 wt% paraffin or microcrystalline wax falls in the 0.5–2.0 Pa·s range at application temperature. Open time is application-dependent, but formulations applied at 150–170°C through slot nozzles generally produce open times of 5–20 s and fibre-tearing bonds on recycled corrugated stock at surface temperatures above 5°C. Below that surface temperature, substrate heat loss quenches the melt before fibre penetration, producing adhesive failure at the starch-coated surface layer.
When the resin is evaluated as a replacement for a 12 wt% VA grade in paraffin or microcrystalline wax coating compounds, the crystallisation behaviour and failure mode change. A 28 wt% VA grade forms smaller, less ordered crystallites, which lowers the onset of the crystalline freezing transition and extends the tack-free time. In a model coating containing 60 wt% fully refined paraffin wax, 30 wt% CE9619-1, and 10 wt% rosin ester, a 50 µm coating on kraft stock may require 10–30 s longer to reach non-blocking under 23°C forced air than the equivalent low-VA formulation. The benefit is an improvement in flex crack resistance at freezer temperatures and higher adhesion to paper fibres; the penalty is an increase in water vapour transmission rate. Under 38°C and 90% RH with ASTM E96/E96M or DIN 53122-1, EVA-containing wax coatings with 28 wt% VA are reported to transmit water vapour at rates 2–5× those of 12 wt% VA formulations of equal thickness. If the coating is intended for frozen-food barrier packaging, the higher WVTR must be offset with a thicker coating or an additional barrier layer. On a production wax coater running at 300 m/min, the replacement usually requires a 5–10°C reduction in application temperature because the lower crystallinity of CE9619-1 reduces hot-melt viscosity at the same temperature.
Moisture control is the first process boundary. Although EVA is not hydrolytically sensitive in the same manner as PET or polyamide, surface moisture on pellets entering a melt stream above 180°C can produce splay, bubbles, and local viscosity reduction. Pre-drying is recommended at 60–70°C for 4 h in a desiccant-bed dryer with a dew point of at least -20°C whenever pellet moisture exceeds 0.1 wt%. The resin should be processed at melt temperatures no higher than 230°C; for thin-gauge cast film or extrusion coating, a vented barrel and a corrosion-resistant screw/barrel combination are recommended. At shutdown, the machine should be purged with a low-MFI LDPE at 200°C until the melt appears clear; EVA residue left in a hot barrel degrades to acetic acid and can cause pitting on nitrided surfaces. On a production-scale 30:1 L/D single-screw cast-film line, a typical temperature profile is 120–180°C from feed to die, with die temperature at 180°C and chill roll at 15–25°C. Because the melt strength of CE9619-1 is lower than that of a 12 wt% VA grade, draw resonance and edge neck-in appear at lower draw ratios; an air knife positioned close to the die and a short air gap reduce these defects.
Compounding CE9619-1 into polypropylene or polyethylene is performed on a co-rotating twin-screw extruder; the EVA pellets should be side-fed into the melt or introduced through a cooled feed throat because hopper temperatures above 35°C can soften the pellet surface and cause bridging. In polypropylene impact modification at 10–15 wt%, dispersing the EVA domains requires a viscosity ratio near 1.0. If the ratio deviates by more than one decade, the phase morphology becomes coarse and the notched Izod impact energy under ISO 180 does not improve proportionally. At 6 g/10 min, CE9619-1 is in a moderate melt-flow range; it disperses more easily than an EVA grade below 2 g/10 min but provides less cohesive strength in a compound than a grade below 1 g/10 min. In olefin-based antifog or cling masterbatches, addition levels above 20 wt% reduce flexural modulus by roughly 30–50 MPa per 10 wt% when measured by ISO 178. The exact offset depends on host crystallinity and whether the EVA is grafted or crosslinked in a subsequent peroxide step.
Tensile and dynamic mechanical behaviour follow the same comonomer trade-off. Under ISO 527-2, a 28 wt% VA EVA of this melt-flow class typically exhibits elongation at break above 700%, Shore A hardness near 80 by ISO 868, and tensile strength below 25 MPa. The storage modulus at 23°C is lower than that of a 12 wt% VA EVA by approximately 40–60%, while the loss tangent peak shifts to a lower temperature. This shift matters in injection-molded footwear components or extruded gaskets: CE9619-1 provides softer feel and greater energy dissipation at ambient temperature but reduces creep resistance under load above 45°C. In dynamic mechanical analysis at 1 Hz, the plateau modulus begins to fall between -20°C and 0°C; above 70°C, viscous flow becomes pronounced, limiting continuous service in load-bearing applications. These properties distinguish the grade from high-VA EVA materials: a 40 wt% VA grade is softer and has lower heat resistance, while a 12 wt% VA grade is stiffer and more creep-resistant but less adhesive to polar substrates.
For food-contact evaluation, the grade may be assessed under 21 CFR 177.1350 for ethylene-vinyl acetate copolymers, provided the finished article meets the extractives limitations and use restrictions in that section. In the European Union, the finished article is evaluated under Regulation (EU) No 10/2011; overall migration must not exceed 10 mg/dm² of food-contact surface area unless the specific food type and worst-case time/temperature support a different limit. Paper and board coatings containing CE9619-1 and paraffin wax are commonly tested with food simulant D1 for aqueous foods and simulant D2 for fatty foods under 40°C for 10 days or 70°C for 2 h depending on the intended use. REACH Regulation 1907/2006 and RoHS Directive 2011/65/EU documentation are normally supplied through the raw material compliance statement. Because ethylene-vinyl acetate copolymer is not a PVC compound, the restrictions on cadmium-based stabilisers and certain phthalate plasticisers that apply to flexible PVC are not the same; however, this does not imply automatic food-contact approval for every formulation. Published migration data for CE9619-1 in direct retort contact are limited, and end-users must conduct specific migration testing before commercial approval.
| Property or requirement | Reference | Nominal value or condition |
|---|---|---|
| Vinyl acetate content | ISO 8985 | 28 wt% |
| Melt mass-flow rate | ISO 1133-1:2022 | 6 g/10 min at 190°C/2.16 kg |
| Density | ISO 1183-1 | 0.950 g/cm³ |
| Tensile elongation at break | ISO 527-2 | Above 700% for the class |
| Shore A hardness | ISO 868 | Approximately 80 |
| USA food-contact status | 21 CFR 177.1350 | Finished article extractives limit |
| EU overall migration | Regulation (EU) No 10/2011 | ≤ 10 mg/dm² |
| RoHS scope | Directive 2011/65/EU | Not a PVC compound; no phthalate plasticiser requirement |
Compared with ethylene acrylic acid copolymers and ionomers, CE9619-1 has lower oil and grease resistance because the acetate ester group is more hydrolytically labile and lacks ionic crosslinks. Under ASTM D543, a 7-day exposure to IRM 903 oil at 23°C commonly produces 10–20% mass uptake in a 28 wt% VA EVA, while a partially neutralised ionomer may show <5% uptake under the same conditions. EVA is therefore not recommended for under-hood seals or oil-contact parts with sustained service above 80°C. Conversely, CE9619-1 processes at lower temperatures than ionomers and has broader compatibility with rosin ester and hydrocarbon tackifiers, which is the reason for its use in hot-melt adhesive systems. In a 50/50 melt blend with rosin ester, the cloud point is typically 15–25°C lower than a comparable low-VA EVA blend because polar-polar interactions suppress phase separation.
