| HS Code | 981135 |
| Vinyl Acetate Content | 9% |
| Melt Index 190 C 2 16kg | 1.1 g/10 min |
| Density | 0.932 g/cm³ |
| Tensile Strength At Break | 22.1 MPa |
| Elongation At Break | 650% |
| Melting Point Dsc | 96 °C |
| Vicat Softening Point | 72 °C |
| Shore A Hardness | 94 |
| Brittleness Temperature | -75 °C |
| Volume Resistivity | 1.5 x 10^15 ohm-cm |
| Dielectric Constant 1 Mhz | 2.8 |
| Dissipation Factor 1 Mhz | 0.001 |
As an accredited Ateva 1081 EVA Copolymer Resin,9% VA,1.1 MI,Wire & Cable Grade factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Supplied as EVA resin pellets in 25 kg bags, palletized and stretch-wrapped, with 40 bags per pallet (1,000 kg total). |
| Container Loading (20′ FCL) | 20′ FCL loaded with Ateva 1081 EVA resin in palletized bags, safely secured for shipment, preserving quality and handling efficiency. |
| Shipping | Ateva 1081 EVA Copolymer Resin ships as non-hazardous pellets in moisture-proof bags, gaylords, or bulk hopper trucks. Keep dry, avoid direct sunlight, and store below 40°C to prevent agglomeration. Use clean, covered transport equipment to prevent contamination. Handle with standard industrial safety practices, including dust protection. |
| Storage | Store Ateva 1081 EVA copolymer resin in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and open flames. Keep original containers tightly sealed to prevent moisture pickup and contamination. Avoid excessive humidity and temperature fluctuations. Maintain good housekeeping to minimize dust accumulation. Follow the manufacturer’s safety data sheet for specific handling and shelf-life guidelines. |
| Shelf Life | Shelf life is indefinite when stored in a cool, dry area away from direct sunlight and moisture. |
In single-step Monosil silane-grafting lines outfitted with a 24:1 L/D single-screw extruder, Ateva 1081 is fed as the primary polyolefin base resin at 60–70 wt% of the insulation compound, with the silane cocktail—typically vinyltrimethoxysilane combined with 1,1-di(tert-butylperoxy)-3,3,5-trimethylcyclohexane or dicumyl peroxide as the grafting initiator—added at 1.2–2.0 phr through liquid injection into the barrel melt seal. The catalyst masterbatch containing dibutyltin dilaurate is dosed at 5–8 wt% in the extruder hopper or through a downstream side feeder to limit premature condensation. The 9% vinyl acetate content, determined by ASTM D5594-18, and 1.1 g/10 min melt mass-flow rate, measured under ISO 1133-1:2022 at 190°C/2.16 kg, produce a melt viscosity suitable for high-head-pressure extension onto copper conductors without excessive die swell. During processing, barrel temperature zones are maintained between 150°C and 210°C, screw speed is held within 30–60 rpm, and melt temperature is controlled below 220°C to suppress gel formation; after extrusion and water cooling, the insulation is wound onto drums and exposed to a curing chamber at 70–95°C and 60–80% relative humidity for 24–72 h, depending on wall thickness. This moisture-induced curing converts grafted alkoxysilane side groups into Si-O-Si crosslinks; the resulting thermoset insulation is specified for building wire constructions under IEC 60502-1:2021 and HD 603 S1, with mechanical property verification through IEC 60811-401:2012 tensile tests and hot-set testing through IEC 60811-501:2012. Finished product types include single-core low-voltage installation cables, meter tails, and service-entrance conductors where 90°C continuous conductor temperature and reduced deformation at short-circuit temperature are required.
Medium-voltage cable conductor shields and insulation shields are formulated with conductive carbon black loadings of 25–45 wt%, a range that cannot be processed effectively with a single 9% VA EVA because the low polarity and high crystallinity of Ateva 1081 produce excessive filler-binder viscosity and poor dispersion. Ateva 1081 is therefore introduced as a co-binder at 15–35 wt% alongside an EVA or ethylene-butyl acrylate copolymer with higher comonomer content, typically 18–28% VA, to lower compound melt viscosity and increase polar affinity for N550 or N660 conductive carbon black. The compound is produced on a co-rotating twin-screw extruder with a 40:1 L/D ratio, using barrel temperatures between 160°C and 190°C, screw speed of 250–500 rpm, and twin side-feeders for carbon black to prevent pellet rupture; undispersed carbon black agglomerates larger than 25 µm must be absent from the final compound because they create protrusions that increase electric field stress within the insulation shield. The relevant standard framework includes IEC 60502-2:2014 for medium-voltage cables and ICEA S-93-639 for shielded power cable; volume resistivity is measured using ASTM D257-14, but the specific volume resistivity limit is set by the cable specification class and is not an inherent property of the EVA grade. Finished products include triple-layer coextruded conductor shields and strippable or bonded insulation shields for XLPE-insulated medium-voltage distribution cables. Published data for Ateva 1081 as a sole semi-conductive binder is limited; formulations with less than 15 wt% high-VA co-resin generally show reduced elongation under hot creep.
When the outer sheath must satisfy low-smoke, halogen-free emission criteria with smoke density of at least 60% light transmittance under IEC 61034-2:2005+AMD1:2013 and a pH above 4.3 with conductivity below 10 µS/mm under IEC 60754-1:2011 and IEC 60754-2:2011, Ateva 1081 is included at 20–40 wt% as a high-melt-strength co-resin in a formulation dominated by 50–65 wt% aluminum hydroxide and 5–15 wt% magnesium hydroxide. The 1.1 g/10 min melt index provides shear-thinning behavior that helps wet uncoated ATH particles; however, its low VA content must be compensated with 28% VA EVA or linear low-density polyethylene to maintain elongation at break above 150% after 10 days of thermal ageing at 100°C. Mixing is performed on a 44:1 L/D twin-screw extruder with reverse kneading blocks and side-fed flame-retardant fillers, maintaining melt temperature between 140°C and 170°C to avoid aluminum hydroxide decomposition that releases water above 180°C; pelletizing uses underwater strand cooling at 20–40°C. The compound is then extruded onto multi-core control, railway signaling, and building riser cables through a single-screw sheathing extruder with a 25:1 L/D screw and screen pack of 100/200/325 mesh. Compliance also includes EN 50363-0:2011 for low-voltage sheathing materials, REACH SVHC restrictions, and RoHS 2011/65/EU; finished product types are halogen-free control cables, signaling cables, metro and railway cables, and emergency circuit cables.
In peroxide-cured low-voltage insulation, Ateva 1081 is used as the principal base resin at 100 phr, with dicumyl peroxide added at 1.0–1.5 phr, a triallyl isocyanurate or trimethylolpropane trimethacrylate coagent at 0.3–0.8 phr, and a hindered phenol/phosphite stabilizer package at 0.5–1.0 phr. The processing window is governed by the half-life of dicumyl peroxide; because the half-life at 171°C is approximately 1 min, compound melt temperature during pre-mixing and extrusion must remain between 110°C and 125°C to preserve a scorch margin. Batch-to-batch variance on twin-screw lines is monitored by Mooney viscometer at 125°C; an increase above the established batch baseline after 30 min indicates premature scorch caused by excessive barrel temperatures or inadequate peroxide incorporation. On a continuous vulcanization line, the molten compound is extruded through a crosshead die at head pressure 150–250 bar and enters a dry-cure or steam tube maintained at 200–230°C under nitrogen pressure of 10–12 bar; residence time is calibrated against insulation thickness to minimize the size of peroxide decomposition bubbles. Hot-set elongation after curing is tested per IEC 60811-501:2012 with a 0.2 MPa load at 200°C; for low-voltage applications, permanent elongation after 15 min under load must typically be below 15%, and elongation under load below 175%, but exact requirements are specified in IEC 60502-1:2021 and UL 44:2023 for thermoset-insulated wires. Terminal products include building wire, industrial power cable, and mining cable insulation where thermomechanical stability is required. Ateva 1081 alone will not pass high-temperature flame tests without the addition of halogen-free or mineral flame-retardant systems.
A split-feed twin-screw compounding line with a 44:1 L/D, 12-barrel configuration and a side feeder located at barrel 7 is used to produce 30–65 wt% Ateva 1081 carrier masterbatches for cable jacketing compounds, where the remaining formulation consists of 20–40 wt% pigment or functional filler, 1–5 wt% processing aid, and 0.2–0.8 wt% antioxidant. The resin is first melted in barrels 1–3 at 140°C; pigment is introduced downstream to minimize thermal degradation and reduce specific energy input; barrel temperatures from barrel 5 onward are held between 150°C and 170°C. Gear pump discharge pressure is maintained between 80 bar and 120 bar, and the melt is filtered through a 200/325 mesh screen pack before underwater pelletization. The use of Ateva 1081 as a high-molecular-weight carrier is intended to reduce agglomerates of carbon black or organic pigments, which is assessed according to IEC 60811-411:2012 for carbon black dispersion in polyethylene compounds and EN ISO 4892-2:2006/Amd 1:2009 for xenon-arc weathering of coloured sheaths. Finished product types include pre-coloured outer sheath compounds for fibre optic cables, telecom cable jackets, and industrial power cable jackets.
In thin-wall wire insulation, Ateva 1081 is extruded as neat resin or with a crosslinking coagent at 0.5–2.0 phr, typically triallyl isocyanurate or trimethylolpropane triacrylate, plus 0.5–1.0 phr of hindered phenol/phosphite antioxidant. The compound is processed on a 24:1 L/D single-screw extruder with melt temperature between 130°C and 160°C before being applied at a wall thickness of 0.25–0.50 mm onto copper conductor. Irradiation is performed in an electron-beam accelerator with energy between 1.0 MeV and 2.5 MeV, and the absorbed dose is partitioned into multiple passes of 25 kGy or less per pass to control heat rise, with total dose within 125–200 kGy. Dose partitioning is necessary because excessive adiabatic heating during a single pass can soften the insulation and produce conductor adhesion; after irradiation, gel fraction is measured by extraction in boiling xylene for 12 h, with a typical industrial acceptance range of 60–80% for crosslinked low-voltage insulation. Compliance is assessed under UL 758:2021 for appliance wiring material and UL 1581:2022 for wire and cable test methods; terminal products include appliance internal wiring, automotive primary wire, and industrial control panel wiring where thin walls and resistance to cut-through are required. Published data for Ateva 1081 radiation gel-dose response in thin-wall configurations is limited; dose verification on production spools is therefore conducted by tensile and hot-set methods rather than relying solely on resin-level nominal values.
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Ateva 1081 EVA Copolymer Resin, 9% VA, 1.1 MI, Wire & Cable Grade is a low-vinyl acetate ethylene-vinyl acetate copolymer supplied with a nominal vinyl acetate content of 9 wt% and a melt flow index of 1.1 g/10 min measured at 190 °C under 2.16 kg load according to ASTM D1238 or ISO 1133-1:2022. Published datasheet values list a neat-resin density of 0.928 g/cm³ by ASTM D1505 or ISO 1183-1:2019. The low comonomer content places Ateva 1081 between branched low-density polyethylene and flexible EVA grades in terms of crystallinity, polarity, and melt behavior. The resin retains sufficient vinyl acetate functionality to improve filler wetting, carbon black dispersion, and adhesion to polar substrates, while avoiding the higher hygroscopicity and acetic acid evolution risk associated with high-VA EVA copolymers. Wire and cable compounders employ the product in peroxide-crosslinked insulation bases, silane-grafted moisture-cure systems, and polyethylene-based semiconductive shield compounds where controlled polarity and thermal stability are more important than rubber-like flexibility.
The technical suitability of Ateva 1081 for wire and cable insulation depends on three interrelated properties: crystallinity retention, melt-index-dependent shear response, and controlled filler acceptance. At 9 wt% vinyl acetate, the copolymer retains a semicrystalline polyethylene backbone with a peak melting temperature near 99 °C by ASTM D3418 or ISO 3146. This crystallinity provides resistance to room-temperature creep, lower pellet blocking during silo storage, and higher softening temperature than an 18 wt% or 28 wt% VA EVA. The melt flow index of 1.1 g/10 min is low enough to support vertical insulation die stability and prevent sagging on cable jacketing lines, but still permits flow under moderate twin-screw shear rates above 200 rpm. The vinyl acetate groups act as an internal compatibilizer for aluminum trihydrate, magnesium hydroxide, carbon black, and silane coupling agents. Because the acetate content is limited to 9 wt%, the resin absorbs less water than higher-VA grades and exhibits a lower tendency for deacetylation-induced odor or corrosion on downstream processing equipment. In comparative terms, Ateva 1081 will not replace a 28 wt% VA EVA in applications requiring high filler loadings above 45 wt% or low-temperature impact below -40 °C; those formulations require higher acetate levels to reduce crystallinity and increase flexibility.
Compounding operations on production-scale lines frequently introduce Ateva 1081 as pellet feed into a counter-rotating twin-screw extruder with a side-stuffer for filler addition. The low melt index requires adequate melting-zone length. Screw configurations with 2.5:1 to 3.0:1 compression ratio barrier sections are preferred over standard single-stage compression screws. If hopper temperature exceeds 55 °C, pellet bridging can occur because surface tack develops before the material enters the feed throat. Moisture uptake is low relative to higher-VA EVA grades, but drying at 80 °C for 4 h to 6 h is recommended after exposure to relative humidity above 60% when silane-grafting or moisture-sensitive additives are used. On 40:1 L/D twin-screw extruders, barrel temperatures from 130 °C to 180 °C typically produce stable head pressure and melt temperatures below 200 °C. Hot spots above 230 °C should be avoided because localized overheating can initiate vinyl acetate deacetylation and acetic acid release. Processing experience with similar 9 wt% VA EVA resins indicates that melt fracture is often misdiagnosed as insufficient plasticization; the more frequent cause is low die temperature or low head pressure. Increasing die temperature or using a barrier screw rather than raising all barrel temperatures generally reduces surface roughness without increasing degradation risk.
Silane-grafting of Ateva 1081 with vinyltrimethoxysilane or vinyltriethoxysilane is typically initiated with dicumyl peroxide at levels between 0.05 wt% and 0.15 wt%. Process engineers must maintain melt temperature below 210 °C because the combined effect of peroxide radicals and vinyl acetate ester groups can accelerate chain scission and generate acetic acid. The low vinyl acetate content of 9 wt% widens the safe grafting window compared with an 18 wt% VA EVA, but this advantage is partially offset by the higher crystallinity of Ateva 1081, which requires higher barrel temperatures for complete melting. Published data for this specific configuration is limited; industrial experience with similar 9 wt% VA EVA resins suggests that a melt temperature plateau of 165 °C to 195 °C provides an acceptable balance between grafting efficiency and degradation. Operating below 150 °C can leave ungrafted silane, which reduces the long-term thermal stability of moisture-cured insulation. Post-graft catalyst masterbatch addition is normally performed in a second extrusion step at lower melt temperature to avoid premature crosslinking in the feed throat or screen pack. When the compound is evaluated by hot-set testing under IEC 60811-507 or UL 1581, inadequate silane grafting usually appears as elongation above the permitted limit or conductor displacement under load. The low acetate content of Ateva 1081 reduces water absorption in the cured insulation, which can improve wet electrical performance, but it also reduces the polar site density available for adhesion to unprimed copper or aluminum conductors.
Carbon black dispersion in semiconductive compounds based on Ateva 1081 is influenced by the same controlled polarity that improves filler wetting. At 9 wt% vinyl acetate, the resin provides lower volume resistivity and better furnace black wetting than nonpolar LDPE homopolymer, but higher compound stiffness than an 18 wt% VA EVA. On twin-screw lines with side-feeding of acetylene black or furnace black at loadings of 30 phr to 45 phr, surface roughness is typically controlled by screw design and die land length rather than by increasing processing temperature alone. A die land length of 10 mm to 15 mm and a 60/100/60 mesh screen pack reduce melt fracture and improve surface smoothness. The grade’s low melt flow index can generate elevated head pressure; pressure transducers above 250 bar on a 40:1 extruder indicate insufficient melt temperature or excessive filler loading and require adjustment before the product reaches the die. For semiconductive shields used in medium-voltage cable, the carbon black dispersion quality is commonly screened by surface resistivity testing or by optical microscopy on compression-molded plaques. Poor dispersion in low-VA EVA is usually associated with unmelted resin domains rather than carbon black agglomeration, so the first corrective action is to verify that the melting zone length and barrel profile are sufficient for the resin’s crystallinity.
Compared with high-VA Ateva grades, Ateva 1081 should not be selected when the cable compound requires low-temperature flexibility below -40 °C, very high plasticizer retention, or filler loadings above 45 wt% without sacrificing elongation. The low acetate content reduces water absorption and improves electrical insulation under wet conditions, but the compound’s polarity is too low for strong adhesion to polyamide or polyurethane jackets unless surface treatment or adhesion promoters are used. Conversely, the grade is preferable to LDPE homopolymer where thermal expansion mismatch with copper conductors causes stress cracking; the vinyl acetate segments interrupt crystallinity and increase environmental stress crack resistance under elevated temperature and humidity cycling. Published data for Ateva 1081 in direct comparison with 9 wt% VA grades from other suppliers is limited; selection should be validated using the specific compound formulation and the final cable test standard.
Compliance documentation for wire and cable compounds based on Ateva 1081 normally includes raw resin certification against ASTM D1238, ASTM D1505, and the supplier’s internal lot-control limits for vinyl acetate content by ASTM D5594 or Fourier-transform infrared spectroscopy. Finished cable insulation is evaluated under UL 1581 or IEC 60502 for tensile strength, elongation, heat-ageing retention, and cold bend performance. The resin is supplied under REACH Regulation EC 1907/2006 and RoHS Directive 2011/65/EU requirements as a polymer; product-specific compliance should be confirmed with manufacturer documentation. No FDA 21 CFR food-contact claim is made for this grade.
| Property | Standard | Condition or Typical Value |
|---|---|---|
| Melt flow index | ASTM D1238 / ISO 1133-1:2022 | 190 °C, 2.16 kg; 1.1 g/10 min |
| Density | ASTM D1505 / ISO 1183-1:2019 | 0.928 g/cm³ |
| Vinyl acetate content | Manufacturer FTIR method | 9 wt% |
| Peak melting temperature | ASTM D3418 / ISO 3146 | Approximately 99 °C |
| Wire and cable thermal ageing | UL 1581 / IEC 60502 | Compound-dependent |
In formulations where peroxide-crosslinked insulation must withstand high-temperature aging, Ateva 1081 is commonly modified with antioxidants and coagents rather than used neat. The selection of antioxidant package is governed by the final cable specification and the peroxide type. Dicumyl peroxide and bis(tert-butylperoxyisopropyl)benzene are both used in EVA-based insulation compounds, but the lower VA content of Ateva 1081 means that scorch time is generally longer than in higher-VA EVA at the same peroxide loading. This longer scorch time can improve extrusion stability, but it may require higher peroxide dosage to reach the same crosslink density. When compounds are run on long-cone twin-screw lines with high head pressure, the improved thermal stability of Ateva 1081 becomes a practical advantage because it permits longer production campaigns before polymer degradation deposits appear on screen packs or die lips. However, the grade’s higher crystallinity can produce greater die swell than flexible EVA, so die gap compensation is often required when transitioning from an 18 wt% VA product on the same tooling.
