| HS Code | 233567 |
| Product Name | ELVAX 260 Ethylene Vinyl Acetate Copolymer |
| Chemical Family | Ethylene Vinyl Acetate (EVA) |
| Vinyl Acetate Content | 28 wt% |
| Melt Flow Rate | 6 g/10 min (190°C/2.16 kg) |
| Density | 0.955 g/cm³ |
| Tensile Strength | 19 MPa |
| Elongation At Break | 800% |
| Hardness | 45 Shore D |
| Melting Point | 72°C |
| Vicat Softening Point | 50°C |
| Brittleness Temperature | -60°C |
| Refractive Index | 1.50 |
As an accredited ELVAX 260 Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ELVAX 260 Ethylene Vinyl Acetate Copolymer is packaged as solid pellets in 25 kg polyethylene bags. |
| Container Loading (20′ FCL) | 20′ FCL container loading of ELVAX 260 EVA copolymer in bags on pallets, secured and ventilated for safe transport. |
| Shipping | ELVAX 260 Ethylene Vinyl Acetate Copolymer ships as a non-hazardous solid resin, typically in multiwall paper bags, boxes, or supersacks. Keep dry and avoid excessive heat or direct sunlight during transport. Store in a cool, ventilated area. No special hazmat labeling required under normal shipping conditions. |
| Storage | Store ELVAX 260 in its original, unopened packaging in a cool, dry, well-ventilated area. Avoid direct sunlight, heat sources, and high humidity to prevent clumping or blocking. Keep away from strong oxidizers. Use proper ventilation when handling. With correct storage, the resin typically maintains quality for several years. |
| Shelf Life | Shelf life is typically 2 years when stored in original containers under cool, dry conditions away from heat and sunlight. |
In high-speed corrugated case-sealing lines where compression time is limited to 0.6–1.2 s, the molten adhesive must retain pressure-sensitive tack at 150–170°C without forming a surface skin in the reservoir. ELVAX 260 with 28 wt% vinyl acetate and a nominal melt index of 6 g/10 min per ISO 1133-1 is incorporated at 15–35 wt% of the adhesive mass, balanced against 25–45 wt% hydrocarbon or rosin ester tackifier and 15–30 wt% Fischer-Tropsch or paraffin wax; a hindered phenolic antioxidant is kept at 0.2–0.5 wt% to control viscosity drift. Processing takes place in a heated anchor-agitator kettle or single-screw extruder at 120–180°C, with granules pre-dried at 60°C for 2–4 h when storage humidity exceeds 60% RH to minimize steam-induced void formation. The melt is applied by slot-die or spiral-spray nozzle at 150–170°C, and open time is engineered through wax crystallinity rather than by raising polymer content beyond 35 wt%, which would increase char formation on continuous coating heads. Compliance for case-sealing adhesives used as indirect food contact is supported by FDA 21 CFR 175.105, and batch viscosity is monitored by ASTM D3236. Terminal articles include corrugated case sealing, bookbinding hinge gluing, folding carton side-seam bonding, and paperboard tray closure.
The limiting variable is rarely polymer dissolution alone; it is the competition between polymer swelling and phase inversion at 2–6 wt% addition. ELVAX 260 is metered into preheated paving-grade bitumen at 160–180°C with a rotor-stator high-shear mill operating at 1,000–3,000 rpm for 60–180 min, followed by low-shear maturation at 170–185°C. Above 190°C, acetic acid elimination from vinyl acetate sequences accelerates viscosity fluctuation and can produce gel specks in binder tanks; below 160°C, undissolved granules persist as soft agglomerates that fail the EN 14023:2010 homogeneity requirement. When storage stability is required for vertical tanks, elemental sulfur is added at 0.05–0.15 wt% to form sulfide bridges between polymer and bitumen, but overdosing beyond 0.2 wt% leads to excessive elastic recovery and pumping resistance. Compliance is demonstrated through ASTM D36 for softening point, ASTM D5 for penetration retention, and ASTM D5976 for polymer-modified asphalt cement properties; published data for the exact sulfur response of 28 wt% VA copolymer in all bitumen grades is limited because maltene composition shifts the phase inversion threshold. Terminal products include heavy-duty pavement binders, airport surface course asphalt, bridge deck waterproofing membranes, and torch-applied bituminous sheets where polymer network integrity affects low-temperature crack resistance.
| Standard designation | Property tested | Operational limitation monitored |
|---|---|---|
| EN 14023:2010 | PMB specification framework | Storage stability, softening point, and elastic recovery |
| ASTM D36 | Softening point | High-temperature rutting resistance after polymer network formation |
| ASTM D5 | Penetration | Retained penetration after short-term aging |
| ASTM D5976 | Polymer-modified asphalt cement | Homogeneity and phase separation limits |
Formulating LSZH jacket compounds around ELVAX 260 involves a double constraint: the 28 wt% vinyl acetate content provides char yield and mineral wetting, while the 6 g/10 min melt index limits the maximum filler loading before screw torque and melt pressure become unmanageable on a co-rotating twin-screw extruder with L/D 40–48. The resin is used at 30–40 wt% of the polymer phase, typically in combination with LLDPE or anhydride-modified PE, and is compounded with aluminum trihydrate at 120–160 phr, magnesium hydroxide at 30–60 phr, zinc borate at 5–15 phr, vinyl silane coupling agent at 0.5–2.0 phr, and hindered phenol/phosphite antioxidant at 0.5–1.5 phr. Processing requires pre-drying at 60°C for 4 h because surface moisture on mineral filler and EVA granules raises hydrolysis risk and can reduce volume resistivity; the extruder temperature profile is held at 130–170°C, with the die head limited to 165±5°C to avoid acetic acid release. Mineral fillers are introduced by side-feed after the polymer phase is melt-sealed, and screw speed is kept in the range where melt temperature does not exceed 175°C. Compliance is assessed by IEC 60754-1 for halogen acid gas generation, IEC 60754-2 for pH and conductivity of effluent, IEC 60332-3-24 for vertical flame spread on bunched cables, and EN 50575:2014+A1:2016 for construction product reaction-to-fire classes. Terminal products are low-smoke zero-halogen sheathing compounds for building riser cables, tunnel power cables, and marine shipboard wiring.
For hot-dip paperboard coating lines operating at 150–300 m/min, ELVAX 260 is added at 2–10 wt% of the paraffin or microcrystalline wax melt to suppress crystalline fracture and improve grease resistance without raising coating viscosity beyond the capillary-leveling window. The wax is heated in a steam-jacketed blending kettle at 120–140°C under low-shear turbine agitation until the EVA is optically clear, then applied by curtain coater or polished-roll kiss coater to paperboard cups, food wrappers, and corrugated freezer cartons. Indirect contact compliance is supported by FDA 21 CFR 176.170 and 21 CFR 176.180 for paper and paperboard components, and the terminal products include wax-coated foodservice paper, protective overwrap, and candle extender compounds where EVA modifies wax shrinkage and surface gloss.
When ELVAX 260 is selected as the base resin for crosslinked foam, the formulation is built in phr because blowing and crosslinking reactions must be balanced to prevent gas loss before gelation. Typical loadings are 100 phr ELVAX 260, azodicarbonamide blowing agent at 2.5–5.0 phr, dicumyl peroxide at 0.8–1.2 phr, zinc oxide at 1.0–2.0 phr, stearic acid at 0.5–1.0 phr, and calcium carbonate at 5–20 phr where dimensional stability is required. The compound is mixed in an internal mixer with ram pressure controlled to avoid premature blowing agent decomposition above 140°C, then pelletized and injection-molded at 165–180°C with mold expansion ratios that determine density from 0.15–0.25 g/cm³ for lightweight midsoles. Crosslink density must exceed the threshold at which gas cells coalesce; molar ratio variations in peroxide below 0.8 phr commonly produce split soles on production lines after mold opening. Quality control uses ISO 868 for Shore hardness or ASTM D2240, and REACH compliance under EC 1907/2006 applies to footwear articles exported to the EU. Terminal products are injection-molded running shoe midsoles, sandal sheets, and cushioning pads in sports protective equipment.
Gravure-applied heat-seal coatings for flexible packaging are compounded by dissolving ELVAX 260 at 10–25 wt% polymer solids into a solvent blend such as toluene, methyl ethyl ketone, and ethyl acetate, with resin pre-dried at 50–60°C for 2 h to prevent microgel particles from clogging the 60–120 line/cm gravure cylinder. The dissolution vessel is inerted with nitrogen and jacketed below the solvent reflux point because high-shear dispersion above 40°C accelerates EVA solution viscosity drift and can create insoluble vinyl acetate-rich domains. The lacquer is coated by gravure or reverse-roll at a dry coat weight of 2–6 g/m² onto polyester, aluminum foil, or paper, then dried through a multi-zone oven with the first zone below 60°C to avoid skinning. Heat-seal activation occurs at 110–140°C and 1–3 bar jaw pressure. Indirect food contact is governed by FDA 21 CFR 175.300 for resinous and polymeric coatings, with residual solvent limits checked by GC headspace analysis against harmonized EU packaging specifications. Terminal products include lidding films for dairy trays, medical device pouches, and foil-based confectionery wraps.
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ELVAX 260 ethylene vinyl acetate copolymer is supplied as a pelletized random copolymer in which the manufacturer specifies a vinyl acetate comonomer content of 28 wt% and a melt mass-flow rate of 6.0 g/10 min when determined at 190 °C under a 2.16 kg load according to ASTM D1238 or ISO 1133-1:2022 Procedure A equivalent conditions. The nominal density is 0.955 g/cm³ as measured by ASTM D792 or ISO 1183-1:2019. These values place the grade in a medium-viscosity position within the 28 wt% vinyl acetate series; the material is processable on co-rotating twin-screw extruders with 40:1 L/D configuration, single-screw extruders, and heated batch mixer systems, but it is not optimized for applications requiring high fluidity at low pump pressure. Production-scale compounding records show that the 6.0 g/10 min melt index produces higher torque and die pressure than higher-flow grades at identical screw speeds and barrel settings. Lot-specific values should be verified against the certificate of analysis because melt flow rate and vinyl acetate content can vary within supplier specification limits.
At 6.0 g/10 min, ELVAX 260 generates higher molten viscosity than ELVAX 240 and ELVAX 250 in the same vinyl acetate family. In hot-melt adhesive systems, viscosity measured by ASTM D3236 at 180 °C is strongly influenced by tackifier type, plasticizer content, and wax loading. Low-pressure roll coaters designed for low-viscosity hot melts may exhibit transfer defects if the compounded viscosity exceeds the equipment-specific operating limit; the limiting factor is therefore fluid transport in the coating head rather than polymer thermal stability. Adhesive lines using heated hoses and gear pumps can process this grade when the hose inner diameter, pump displacement, and pressure rating are matched to the higher viscosity. Slot-die coating and profile extrusion are generally better suited than low-pressure roll coating. In single-screw adhesive extrusion, typical feed-section barrel settings are 100–120 °C, with metering zones from 180–220 °C; die pressure will exceed that of a 43 g/10 min grade under the same output rate. Published data for this specific configuration is limited, and pilot trials with production-grade coating heads are required to establish the maximum line speed.
Wax modification and polymer blending represent a second application band. In paraffin and microcrystalline wax systems, incorporation of ELVAX 260 at 5–15 wt% is commonly evaluated to increase flexibility and reduce low-temperature brittleness; the phase morphology depends on cooling rate and comonomer distribution. Softening point can be tracked by ASTM E28, while melt viscosity is measured by rotational viscometry. Blending in a high-shear disperser or twin-screw compounding line is preferred because simple low-shear mixing can leave undispersed EVA domains. The grade also functions as a polymeric modifier in selected polyolefin compounds, where addition levels of 5–20 wt% may improve toughness and stress-crack resistance while reducing modulus. The performance balance is formulation-dependent, and comparative testing on the final compound using ASTM D638 or ISO 527-2 tensile methods is necessary because the base resin properties do not predict the compounded mechanical response.
Compared with an 18 wt% vinyl acetate EVA copolymer, ELVAX 260 exhibits lower crystallinity, lower crystalline melting point, greater quenched-film clarity, higher surface tack, and stronger adhesion to polar substrates such as aluminum, polyester, and polyamide. These characteristics are accompanied by lower tensile modulus, lower hardness, and reduced creep resistance at elevated temperature. Tensile specimens evaluated under ASTM D638-14 may show reduced modulus relative to lower-vinyl-acetate grades, but exact values must be measured on the final compounded formulation because tackifiers, waxes, fillers, and crosslinking agents alter the stiffness and elongation. In flexible packaging sealant layers, the higher vinyl acetate content generally reduces seal initiation temperature compared with an 18 wt% grade; however, the 6.0 g/10 min melt index can limit drawdown at high line speeds. For extrusion coating above approximately 150 m/min, higher-flow grades in the same vinyl acetate series are often evaluated because melt strength and throughput must be balanced against seal performance. Published data for this specific configuration is limited, and line-speed capability should be confirmed by pilot-scale extrusion coating trials.
| Property | Test method | Typical value |
|---|---|---|
| Vinyl acetate content | Supplier FTIR method | 28 wt% |
| Melt mass-flow rate | ASTM D1238 / ISO 1133-1:2022 | 6.0 g/10 min at 190 °C / 2.16 kg |
| Density | ASTM D792 / ISO 1183-1:2019 | 0.955 g/cm³ at 23 °C |
The primary difference between ELVAX 260 and other products in the same vinyl acetate family is melt flow rate rather than comonomer content. ELVAX 240, ELVAX 250, ELVAX 260, and ELVAX 265 all share a nominal vinyl acetate content of 28 wt%, but their melt mass-flow rates differ systematically. The following table summarizes manufacturer-published typical values for that series.
| Grade | Vinyl acetate content | Melt mass-flow rate |
|---|---|---|
| ELVAX 240 | 28 wt% | 43 g/10 min |
| ELVAX 250 | 28 wt% | 25 g/10 min |
| ELVAX 260 | 28 wt% | 6.0 g/10 min |
| ELVAX 265 | 28 wt% | 3.0 g/10 min |
Because ELVAX 260 has a lower melt index than ELVAX 240 and ELVAX 250, it generally provides higher cohesive strength in hot-melt adhesives and slower substrate wet-out. Compared with ELVAX 265, ELVAX 260 flows more readily and may reduce backpressure in heated hose or profile extrusion systems. The selection between these grades should be based on the viscosity requirements of the application equipment and the required balance between adhesion, cohesive strength, and open time. For pressure-sensitive adhesives, peel adhesion measured by ASTM D3330/D3330M and loop tack should be evaluated on the final coated substrate because tackifier migration and coating weight can dominate the performance outcome.
Thermal degradation of ELVAX 260 follows the general ethylene vinyl acetate mechanism of deacetylation. Acetic acid evolution becomes measurable when melt temperature exceeds approximately 230 °C under low-oxygen conditions, and oxygen accelerates color formation. Processing lines should therefore use 316L stainless steel or nickel-plated wetted surfaces, avoid stagnant zones in screen changers and hot runners, and purge with a low-vinyl-acetate polyethylene before shutdown. Pre-drying at 60 °C for 2–4 h is recommended when ambient relative humidity exceeds 60%; although the copolymer is not highly hygroscopic, surface moisture can produce splay in extruded profiles and visible defects in cast films. Peroxide crosslinking, where used, is typically performed with dicumyl peroxide at 1.0–2.0 phr; scorch time measured by ASTM D5289 at 180 °C is strongly formulation-dependent and is influenced by antioxidant type and loading. Strongly alkaline or amine-based additives should be avoided unless their interaction with liberated acetic acid by-products has been evaluated for color formation, plate-out, and corrosion.
Regulatory compliance for finished articles is formulation-dependent. The base resin may be considered for food-contact applications only when the final compound meets the applicable requirements of FDA 21 CFR 177.1350(a) and, for European Union markets, the migration limits of EU Regulation 10/2011. The presence of tackifiers, waxes, plasticizers, or processing aids can alter the overall compliance position. REACH registration under EC No 1907/2006 and RoHS conformance under Directive 2011/65/EU should be confirmed through supplier declarations for the specific lot, because raw-material sourcing and additive packages can affect the final regulatory profile. For pressure-sensitive adhesive constructions, migration of low-molecular-weight tackifier fractions can influence peel adhesion, shear adhesion failure temperature, and food-contact extractives; validated testing on the final coated substrate is required rather than reliance on base resin certifications alone.
ELVAX 260 is not a direct substitute for low-vinyl-acetate EVA in high-modulus molded parts. Its low crystallinity reduces tensile modulus, hardness, and heat deflection; continuous service above 80 °C is generally limited unless the compound is crosslinked or blended with a higher-melting polyolefin. Ultraviolet resistance is limited, and outdoor compounds require carbon black or an appropriate hindered amine stabilizer package. The product is best positioned in formulations where polar adhesion, flexibility, and controlled melt viscosity outweigh the need for high-temperature creep resistance or low-viscosity coating-line performance.
