| HS Code | 761905 |
| Vinyl Acetate Content | 28% |
| Melt Index | 3 g/10 min (190°C/2.16 kg) |
| Density | 0.951 g/cm³ |
| Melting Point | 73°C (DSC) |
| Vicat Softening Point | 44°C |
| Shore A Hardness | 82 |
| Tensile Strength | 7.6 MPa |
| Elongation At Break | 800% |
| Flexural Modulus | 30 MPa |
| Brittleness Temperature | -79°C |
| Residual Vinyl Acetate | Low |
| Volume Resistivity | High (Wire & Cable Grade) |
As an accredited Ateva 2803W EVA Copolymer Resin,28% VA,3 MI,Wire & Cable Grade,Low Residual factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged as 25 kg polyethylene bags on shrink-wrapped pallets, ensuring safe handling and storage. |
| Container Loading (20′ FCL) | 20′ FCL: Ateva 2803W EVA resin packed in 25kg bags on pallets, securely loaded, ventilated, protected from moisture. |
| Shipping | This EVA copolymer resin ships as free-flowing pellets in moisture-resistant bags or bulk hopper containers. It is non-hazardous and requires standard dry cargo transport. Protect from water, humidity, and direct heat to preserve quality for wire and cable applications. |
| Storage | Store Ateva 2803W EVA resin in a cool, dry, well-ventilated area, away from direct sunlight, heat, and ignition sources. Keep containers tightly closed to prevent moisture pickup and contamination. Avoid prolonged exposure to elevated temperatures to prevent degradation or blocking. Follow manufacturer’s guidelines and use within recommended shelf life. |
| Shelf Life | Shelf life is 2 years from date of manufacture when stored in original, unopened packaging in a cool, dry area. |
Ateva 2803W is let down with aluminium trihydrate and magnesium dihydrate in a co-rotating twin-screw extruder having a screw diameter of 75 mm and an L/D ratio of 44:1, with side feed capability positioned downstream of the polymer melting zone so that filler is added only after the EVA phase has been fully plasticated. The addition ratio of Ateva 2803W in halogen-free flame-retardant sheathing compounds commonly falls between 20 wt% and 35 wt% of total formulation, while the total ATH/MDH filler loading is maintained at 150–180 phr on 100 phr polymer. The 28% vinyl acetate content of Ateva 2803W supplies sufficient polar repeat units to wet ATH/MDH surfaces and reduce interfacial void formation without producing the excessive tack and plateout observed with higher vinyl acetate grades at cable extrusion temperatures. The 3 g/10 min melt flow rate, measured according to ISO 1133-1, is low enough to retain compression resistance after sheathing and high enough to permit a 90 mm single-screw extruder to maintain a head pressure below 250 bar with a 200/400/200 mesh breaker plate pack. Pre-drying at 70 °C for 2 hours is required when ambient relative humidity exceeds 60%, because moisture absorbed in the vinyl acetate phase can produce surface roughness and internal microvoids in the jacket. A vacuum vent at the second mixing zone of the twin-screw compounder is operated at −0.08 MPa gauge pressure to strip residual water from the melt before the die face. The low residual catalyst package reduces acetic acid evolution at the die lip and suppresses the formation of hard deposits on the die face during long production runs. Finished compounds are evaluated against IEC 60754-1 and IEC 60754-2 for halogen acid gas and acidity of combustion gases, IEC 61034-2 for smoke density, IEC 60332-3-24 for vertical flame propagation on bundled cables, and IEC 60502-1 for sheathed power cables rated from 1 kV to 30 kV. The terminal product is a halogen-free outer sheath on station power cables and control cables used in underground railways, power distribution buildings, and data centre feeders, where low smoke, low acid gas, and acceptable mechanical strength are specified simultaneously.
| Compliance standard | Test method or clause | Typical acceptance criterion |
|---|---|---|
| IEC 60754-1 | Halogen acid gas content | ≤0.5% HCl equivalent |
| IEC 60754-2 | pH and conductivity of combustion gases | pH ≥4.3, conductivity ≤10 µS/mm |
| IEC 61034-2 | Smoke density in a 3 m cube | Light transmittance ≥60% |
| IEC 60332-3-24 | Vertical flame propagation on bundled cables, category C | Char height ≤2.5 m |
| IEC 60502-1 | Extruded insulation and sheath for power cables 1–30 kV | Sheath tensile ≥9 MPa, elongation ≥125% |
In medium-voltage XLPE-insulated cable construction, Ateva 2803W is incorporated into the strippable semiconductive insulation screen compound as the carrier resin at 30–40 wt%, with conductive carbon black such as N550 or acetylene black at 28–35 wt%, an antioxidant system at 0.5–1.5 phr, and a processing lubricant at 1–3 phr. The compound is manufactured in a twin-screw mixer and then pelletised for use on a three-extruder triple-layer crosshead, where the Ateva 2803W-based screen layer is applied over XLPE insulation at a nominal thickness of 0.5–1.5 mm. Melt filtration through 325 mesh screen packs is used to remove carbon black agglomerates larger than 45 µm; oversized particles can create local electric field enhancements and cause partial discharge failures in high-voltage cable. The 28% vinyl acetate content provides controlled polarity for adhesion to the XLPE core, and strippability is adjusted by the ratio of Ateva 2803W to low-polarity polyolefin modifiers rather than by changing the carbon black grade alone. The 3 g/10 min melt flow allows the semiconductive compound to be extruded without excessive shear heating, which is material because overheating degrades the antioxidant package and increases carbon black dispersion defects at the screen-insulation interface. The low residual catalyst package lowers the ionic impurity concentration in the semiconductive layer, contributing to stable dielectric performance when the finished cable is subjected to IEC 60840 partial discharge testing at 1.5 U0 for 30 min and IEC 60502-2 type tests. Surface smoothness and volume resistivity of the semiconductive layer are verified according to ASTM D3004-20. Terminal products are MV and HV power cable semiconductive screens for utilities and industrial installations, typically rated up to 36 kV for MV and higher for HV designs, where the screen must strip cleanly with a controlled force and leave no carbon black residue on the insulation surface. Published data for the exact stripping force profile of Ateva 2803W-based semiconductive compounds at different polyolefin modifier loadings is limited; therefore, each cable producer validates the formulation on the actual triple-layer extrusion line before full production.
Heat-shrinkable sleeves for low-voltage and medium-voltage cable joints employ Ateva 2803W at 70–100 phr as the base resin, with low-density polyethylene or linear low-density polyethylene at 0–30 phr to adjust dimensional stability and recovery force. The compound is extruded into tube or sheet form on a single-screw extruder with a length/diameter ratio of 30:1, using a barrier screw with a compression ratio between 2.5:1 and 3.5:1 to avoid melt fracture at the low melt temperatures required for controlled distortion during expansion. The extrudate is then crosslinked by electron beam irradiation at a dose level determined through gel content testing; the target gel fraction is generally set between 40% and 70% depending on the shrink ratio and recovery force specification. The irradiated tube is heated above the crystalline melt temperature of the 28% vinyl acetate EVA phase and expanded by vacuum or internal air pressure, then cooled in the expanded state. Low residual catalyst and low volatile content minimise gas voids and surface defects during irradiation and during the recovery process at installation temperatures of 120–135 °C. Compliance is assessed under IEC 60684-3-247 for heat-shrink sleeving and IEC 60684-2 for test methods, while flame-retardant variants are evaluated under UL 224 VW-1. The terminal products are heat-shrinkable insulation and sealing sleeves for cable joints, terminations, and busbar insulation, where the recovered sleeve must retain longitudinal shrinkage below the maximum allowed by the accessory manufacturer after full recovery. Published data for the precise electron beam dose window of Ateva 2803W in 70–100 phr formulations is limited, so each compound must be mapped on the specific accelerator at the target line speed to avoid under-crosslinking or surface oxidation.
For photovoltaic array wire produced under IEC 62930 and EN 50618, Ateva 2803W is formulated at 15–40 phr in the jacket compound together with halogen-free flame retardants, processing stabilisers, and crosslinking co-agents such as triallyl cyanurate or trimethylolpropane trimethacrylate at 0.5–2 phr. The compound is extruded around a tinned copper conductor and XLPE insulation using a 60–90 mm single-screw extruder with a shallow compression screw, a 200/400/200 mesh filter pack, and low-draw vacuum venting. Electron beam irradiation is applied to achieve hot-set elongation below 175% under 0.2 MPa load at 200 °C as specified in IEC 62930; the exact dose is compound-specific and must be tuned against accelerator energy, beam current, and line speed. The 28% vinyl acetate content of Ateva 2803W contributes to low-temperature flexibility and filler wetting, while the 3 g/10 min melt flow allows thin-wall jacket extrusion at 0.6–1.2 mm nominal thickness without excessive head pressure. Low residual catalyst reduces microvoid formation during irradiation, which is relevant where the cable experiences daily thermal cycling on rooftop installations. Terminal products are PV1-F type solar cables and halogen-free photovoltaic wires rated for 1.5 kV DC or higher, installed in solar arrays and inverter connections where UV resistance, long-term wet ageing per EN 50618 clause 5.8, and dynamic penetration resistance per IEC 62930 clause 9 must be demonstrated. UL 4703 applies where North American installation codes are specified.
In electric vehicle charging cable jacket development, Ateva 2803W is used at 20–35 wt% of the total polymer phase in flexible LSZH jackets for mode 3 and mode 4 electric vehicle charging cables under IEC 62893-2 and EN 50620. The compound is processed on a 45–75 mm single-screw extruder with a temperature profile rising from 150 °C at the feed throat to 195 °C at the die, using a gear pump to maintain uniform wall thickness at 0.8–1.5 mm. The 3 g/10 min melt flow permits high-speed jacketing of complex multi-conductor assemblies without creating internal voids at the interstices; however, the same flow value can cause sag in thick sections, so screw speed and haul-off tension must be controlled within a narrow window. The 28% vinyl acetate content increases compatibility with phosphate-based and metal-hydrate flame-retardant systems and reduces the stiffness increase observed with highly filled compounds. Low residual catalyst is relevant for charging cables because ionic decomposition products can migrate to the connector contact surfaces and contribute to surface resistivity changes under humid conditions. The finished jacket is tested for low-temperature flexibility at −40 °C, long-term heat resistance at 105 °C or 125 °C depending on cable class, and flame propagation per IEC 62893-1, IEC 62893-2, and UL 62 VW-1 where applicable. Terminal products are flexible EV charging cable outer sheaths for AC and DC charging stations, including Type 2 and CCS configurations, where mechanical robustness must survive repeated coiling, vehicle runover, and outdoor immersion. The exact ratio of Ateva 2803W to elastomer co-resins must be customised because published data for complete formulation performance across all EV cable classes is limited and varies with connector and vehicle OEM specifications.
In marine and offshore cable manufacturing, halogen-free bedding and filler layers are formulated with Ateva 2803W at 25–35 wt% of the compound, using calcium carbonate, ATH, and processing oils to achieve a soft intermediate layer between the conductor assembly and the outer sheath. The material is applied with a 60 mm extruder operating at a melt temperature of 160–185 °C on a rotating screw line, often with a pressure die that forces the bedding compound into the cable interstices without over-compressing the core. The 28% vinyl acetate content permits the low-hardness compound to remain non-melting and dimensionally stable when exposed to the maximum operating temperature of the cable construction; the 3 g/10 min melt flow aids in the complete filling of small conductor gaps. Low residual catalyst reduces acetic acid release during processing, which lowers the risk of corrosion at the copper conductor if moisture is trapped in the bedding layer. Compliance is verified against NEK 606 for halogen-free marine cables, IEC 60092-359 for sheathing compounds for shipboard power and control cables, and IEC 60754-1/-2 for acid gas and acidity. Terminal products are halogen-free bedding layers used in shipboard cables, offshore platform cables, and floating production storage and offloading vessel cables, where the cable must maintain fire resistance under maritime conditions and avoid releasing halogens into enclosed compartments. The ratio of Ateva 2803W to EVA grades with higher or lower vinyl acetate must be adjusted to maintain the required tensile strength and elongation after ageing at 100 °C for 168 h, as specified by the relevant classification society.
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Ateva 2803W is a low-residual ethylene-vinyl acetate copolymer resin intended for wire and cable insulation and jacketing compounds. The grade is specified with a nominal vinyl acetate content of 28 wt% and a melt mass-flow rate of 3 g/10 min determined at 190 °C under a 2.16 kg load using ISO 1133-1:2022 or ASTM D1238. The low-residual designation refers to reduced catalyst residues, low oligomer content, and controlled ionic contamination relative to general-purpose EVA. These characteristics are relevant in extruded cable constructions where surface smoothness, wet-ageing stability, and dielectric behaviour are monitored. Ateva 2803W is positioned between lower-vinyl-acetate grades that provide higher hardness and lower filler acceptance, and higher-vinyl-acetate grades that provide greater low-temperature flexibility but may increase surface tack. The material is not a finished insulating compound; additives, mineral fillers, antioxidants, and crosslinking agents are introduced by compounders to meet end-use cable standards.
| Property | Representative value | Test method or condition |
|---|---|---|
| Vinyl acetate content | 28 wt% | ASTM D5594 or equivalent internal FTIR method |
| Melt mass-flow rate | 3 g/10 min | ISO 1133-1:2022, 190 °C/2.16 kg |
| Density | 0.95 g/cm³ | ISO 1183-1:2019, method A |
| Physical form | pellets | visual inspection; pellet size controlled by strand pelletizer |
| Residual level | low | solvent extraction and ionic conductivity; acceptance limits set by certificate of analysis |
The vinyl acetate comonomer introduces polar acetate side groups along the ethylene chain, which disrupt crystallinity and reduce melting enthalpy relative to low-VA copolymers. Differential scanning calorimetry performed in accordance with ISO 11357-3 generally places the main melting endotherm for a 28 wt% VA EVA near 70 °C, although the exact peak depends on thermal history and cooling rate. This melting behaviour permits processing at lower barrel temperatures than linear polyethylene while retaining sufficient melt strength for cable crosshead extrusion. The crystallinity reduction also shifts mechanical response: compared with an 18 wt% VA grade, the 28 wt% architecture yields lower Shore hardness and higher elongation at break. Exact comparative values are formulation-sensitive and should be measured on identical compounds under ISO 527-2:2012 or IEC 60811-501.
At a melt mass-flow rate of 3 g/10 min, the resin occupies a mid-viscosity processing window. Higher-MI EVA grades flow more readily through thin-wall crossheads but may lack melt strength in thick-wall jacketing, increasing sag in vertical or catenary extrusion. Lower-MI grades supply higher melt strength but raise melt pressure and may limit throughput through small dies. The 3 g/10 min value is therefore selected for a balance between pressure-driven flow and dimensional control, but the practical operating window depends on screw geometry, crosshead restriction, and filler level.
Production-scale cable lines using a 90 mm single-screw extruder with L/D 30:1 and barrier mixing sections typically require barrel temperatures between 145 °C and 185 °C, with head and die zones held near 190 °C. Melt-pressure fluctuation should be maintained below ±2% for consistent wall thickness; larger variation is associated with capacitance drift and eccentricity in the final cable. When bags are exposed to relative humidity above 60%, pre-drying at 60 °C for 4 h is an operational boundary to reduce surface moisture defects, particularly in high-speed thin-wall extrusion.
Low residual is an operational specification rather than a direct mechanical property. In EVA grades with higher residual catalyst or oligomer content, deposition can accumulate on the die face and vacuum vent ports during extended compounding campaigns. The low-residual formulation reduces the frequency of such deposition, but does not eliminate the need for screen-pack filtration. Compounders typically use filter packs rated from 100 µm to 200 µm and inspect die-face build-up after 8 h to 24 h runs on twin-screw pelletizing lines.
Halogen-free flame-retardant sheathing compounds commonly incorporate aluminium trihydrate or magnesium dihydrate at loadings from 120 phr to 180 phr. The polar acetate groups in Ateva 2803W assist wetting of mineral surfaces, which lowers compound viscosity relative to the same filler loading in low-VA matrices. On a co-rotating twin-screw extruder with L/D 52:1 and side-stuffer feed, melt temperatures are typically held between 160 °C and 190 °C to avoid releasing water of hydration from ATH above 200 °C. Smoke density, gas acidity, and heat release are evaluated under IEC 61034-2, IEC 60754-2, and EN 50267-2-1 only after the compound has been fully formulated and crosslinked, because the base resin alone does not carry flame-retardant classification.
Residual ionic species in EVA can act as charge carriers and increase dielectric loss after water immersion. The low-residual specification of Ateva 2803W is therefore relevant for insulation compounds subjected to volume resistivity testing under IEC 62631-3-1 or ASTM D257. In wet-ageing exposures, ionic contaminants may migrate to the insulation surface or concentrate at filler-polymer interfaces, lowering insulation resistance and promoting leakage current. Published data for this specific grade in defined wet-ageing configurations is limited; qualification requires testing on the finished compound in the intended cable construction.
Wet-ageing stability is not achieved by resin selection alone. Compounders add metal deactivators, antioxidants, and filler surface treatments, and they evaluate resistivity retention after immersion in 0.1 mol/L sodium chloride solution at 75 °C for 7 days to 14 days. The low-residual resin reduces one source of ionic contamination, but the final insulation system must still be verified under IEC 60811-401 or the relevant end-product standard.
In peroxide-curable compounds, Ateva 2803W is compounded with an organic peroxide such as dicumyl peroxide at loadings from 1.0 phr to 2.0 phr. Crosslinking kinetics are monitored on a moving-die rheometer at 180 °C according to ISO 6502-1:2018. The difference between scorch time and cure time defines the available processing window; compound temperature in mixing and crosshead delivery should remain below 125 °C to prevent premature reaction. Dead spots in the head or die can generate gel particles that appear as surface pitting and dimensional deviation in the final insulation.
Crosslinked cable insulation is also subjected to hot-set elongation under IEC 60811-507 using 200 °C, 0.2 MPa, and 15 min holding time. The outcome depends on peroxide level, cure time, and filler content, not on the EVA resin alone. The 3 g/10 min melt mass-flow rate further influences peroxide dispersion in the compound because lower-viscosity matrices permit shorter mixing cycles but may require adjusted temperature control to avoid scorch.
| Property | Standard | Condition or relevance |
|---|---|---|
| Melt mass-flow rate | ISO 1133-1:2022/ASTM D1238 | 190 °C/2.16 kg |
| Tensile and elongation of insulation after ageing | IEC 60811-501 | 250 mm/min, conditioned at 23 °C |
| Hot-set test for crosslinked material | IEC 60811-507 | 200 °C, 0.2 MPa, 15 min |
| Volume resistivity | IEC 62631-3-1 or ASTM D257 | room temperature and after immersion |
| Density of compound | ISO 1183-1:2019 | method A |
| Extractables | ISO 6427:2013 | solvent extraction for contaminant control |
Substitution with an 18 wt% VA EVA at equivalent MI typically raises compound hardness and lowers filler acceptance, which can be detected as an increase in mixing torque and a reduction in elongation at break under IEC 60811-501. Substitution with a 33 wt% VA EVA may improve low-temperature flexibility but increases surface tack and may reduce tensile strength. In each case, the complete formulation must be revalidated because antioxidant solubility, peroxide efficiency, and filler wetting shift with VA content. Ateva 2803W at 28 wt% VA occupies a midpoint that reduces the hardness penalty seen with lower-VA products while limiting the tack and handling problems associated with higher-VA copolymers.
Replacing a 3 g/10 min resin with a higher-MI grade in a thick-wall sheathing line lowers melt pressure and may shorten mixing residence time, but it can also increase sag in vertical extrusion. Sag is evaluated by displacement measurements during vulcanization or by hot-set testing under IEC 60811-507. A lower-MI grade may be selected for high-temperature jacketing where melt strength is critical, while accepting lower throughput on a given crosshead. The choice of MI therefore affects not only processing economics but also the dimensional stability of the cable core after crosslinking. Resin substitution without revalidation of the entire compound can cause failure under IEC 60502-1 or UL 1581, depending on the end-use specification.
The low-residual character of Ateva 2803W further distinguishes it from general-purpose EVA products of the same nominal VA content. In long extrusion campaigns, higher-residual grades may show greater die-face deposit formation and higher extractables in the finished insulation. Extractables are measured by solvent extraction under ISO 6427:2013 or by internal gravimetric methods; acceptance limits are typically defined by the cable manufacturer for wet-ageing service. The low-residual grade does not remove the need for process filtration or compound hygiene, but it reduces one known source of ionic contamination.
