| HS Code | 329900 |
| Vinyl Acetate Content | 28 wt% |
| Melt Flow Rate | 400 g/10 min (190°C, 2.16 kg) |
| Density | 0.952 g/cm³ |
| Melting Point | 65 °C |
| Vicat Softening Point | 39 °C |
| Tensile Strength At Break | 4.8 MPa |
| Elongation At Break | 900% |
| Hardness | 85 Shore A |
| Low Temperature Brittleness | -70 °C |
| Refractive Index | 1.495 |
| Glass Transition Temperature | -45 °C |
| Flexural Modulus | 22 MPa |
As an accredited ELVAX 210W Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ELVAX 210W Ethylene Vinyl Acetate Copolymer is supplied as pellets in sealed 25 kg bags, labeled with grade, lot number, and handling precautions. |
| Container Loading (20′ FCL) | 20′ FCL loading of ELVAX 210W uses palletized bags, blocked and braced, kept dry, away from heat and incompatible cargo. |
| Shipping | ELVAX 210W is shipped as solid ethylene vinyl acetate copolymer pellets. It is non-hazardous and stable under normal conditions. Pack in moisture-resistant bags, keep away from heat, ignition sources, and direct sunlight. Avoid dust accumulation and handle with standard industrial hygiene practices. |
| Storage | Store ELVAX 210W in a cool, dry, well-ventilated area away from direct sunlight, heat, and open flames. Keep containers tightly sealed to prevent moisture absorption and contamination. Avoid contact with strong oxidizing agents. Maintain moderate temperatures and protect from prolonged UV exposure to preserve polymer quality and processing performance. |
| Shelf Life | Stable for two years when stored in original, unopened container below 30°C, away from heat, moisture, and sunlight. |
ELVAX 210W is an ethylene-vinyl acetate copolymer with nominal vinyl acetate content of 28 wt% and a nominal melt flow rate of 400 g/10 min under the supplier-specified ASTM D1238 condition. In industrial downstream processing, the resin functions primarily where low melt viscosity, wax solubility, and compatibility with tackifier resins determine production economics. The following application scenarios are limited to established industrial sectors; no exploratory or adjacent-market claims are included.
Compounding of ELVAX 210W for packaging hot-melt adhesives is performed at 30–40 wt% of the total formulation. The adhesive is typically produced in a jacketed sigma-blade or planetary mixer with a working capacity of 500–2,000 kg at 130–150 °C under a dry nitrogen blanket. The molten compound is discharged through a 250 µm melt filter and delivered by a gear pump to a multi-line slot-die or bead nozzle at 150–170 °C. On corrugated case erectors running at 180–250 m/min, compression time is restricted to 0.5–1.2 s; fiber-tear adhesion on kraft liner must exceed 90% according to ASTM D1876; viscosity is controlled by ASTM D3236 at 150 °C. Residual moisture above 0.1% can hydrolyze rosin ester tackifiers and generate die-lip build-up; pre-drying at 60 °C for 4 h is required when storage RH exceeds 60%. Batch-to-batch viscosity variation must be held below ±5% to avoid nozzle stringing or pump cavitation. The relevant food-contact requirement is FDA 21 CFR 175.105, supplemented by REACH Regulation (EC) No 1907/2006 Annex XVII and Directive 2011/65/EU where electrical/electronic packaging is involved. Terminal finished product types include sealed corrugated shipping cases, kraft paper bags, and coated carton closures.
Representative formulation windows for three packaging adhesive variants are shown below; the values are industrial compounding windows rather than isolated laboratory results.
| Ingredient | Low-temperature adhesive (wt%) | Standard packaging adhesive (wt%) | High-speed case sealing (wt%) |
|---|---|---|---|
| ELVAX 210W | 30–33 | 34–37 | 38–40 |
| Rosin ester tackifier | 38–40 | 34–37 | 30–33 |
| Paraffin/microcrystalline wax | 15–18 | 18–20 | 18–20 |
| Antioxidant | 0.5–1.0 | 0.5–1.0 | 0.5–1.0 |
In wax-based barrier coatings for corrugated board, ELVAX 210W is added at 5–15 wt% of the wax compound. The typical wax base consists of 60–80 wt% paraffin wax with a melting point of 52–58 °C and 10–20 wt% microcrystalline wax. Compounding is carried out in a jacketed kettle or scraped-wall heat exchanger at 110–125 °C with low-shear agitation; the melt is then applied by curtain coater or reverse-gravure coater at 40–80 m/min, producing a coat weight of 8–15 g/m². The function of the copolymer is to increase melt elasticity and reduce low-temperature cracking without pushing 120 °C viscosity above approximately 1500 mPa·s. Below 5 wt%, low-temperature crack resistance is insufficient; above 15 wt%, curtain breakup can occur at the die lip due to excess melt elasticity. A 100 µm screen pack in the coating feed line removes undispersed gel particles. Coated board elongation is measured according to ASTM D882; a typical crack threshold on a 180° fold at -10 °C is used as release criterion. Compliance for food packaging is governed by FDA 21 CFR 176.170 for components of paper and paperboard in contact with aqueous and fatty foods, with migration verification under EC 1935/2004 where EU end-use applies. Terminal finished product types include frozen food trays, corrugated produce cartons, and wax-coated bakery boards.
For perfect binding of softcover books and catalogs, ELVAX 210W is formulated at 25–45 wt% with tackifier resin and wax. The adhesive is melted in a heated roller pot or premelt tank at 150–170 °C and applied to the spine of a gathered block through a roller applicator; open time is typically 3–5 s before the cover is positioned and compressed at 0.2–0.3 MPa. The low melt viscosity of the grade allows penetration into roughened paper fibers, while the 28 wt% vinyl acetate content retains flexibility at low temperatures; cold-crack resistance of the bound spine is characterized by flexing at -15 °C until failure, although published data for this specific configuration is limited. Spine milling depth and paper dust contamination alter adhesive penetration; extraction hoods must remove dust to avoid viscosity increase from filler accumulation. Production equipment includes high-speed perfect binders with milling stations and closed-loop adhesive temperature control; viscosity drift at 160 °C must remain within ±10% over an 8 h shift to prevent cover detachment. Regulatory compliance is documented through REACH Regulation (EC) No 1907/2006 and Directive 2011/65/EU RoHS; no intentionally added phthalate plasticizers are used. Terminal finished product types include softcover books, annual reports, catalogs, and telephone directories.
When oxidized bitumen for roofing membranes is compounded with ELVAX 210W at 3–8 wt%, the copolymer acts as a polymeric modifier that raises softening point and reduces penetration. The blending operation is performed in a heated paddle mixer or inline rotor-stator homogenizer at 170–190 °C for 1–2 h until no undissolved polymer particles remain; overheating beyond 200 °C accelerates oxidative degradation and phase separation. Filler addition of 20–30 wt% calcium carbonate may follow polymer digestion; filler must be predried to avoid steam-induced foaming. The modified bitumen is then applied to a polyester or glass-fiber carrier through a doctor-blade or extrusion lamination line to form torch-applied or poured-and-rolled roofing membranes. Softening point is measured by ASTM D36 or EN 1427, low-temperature flexibility by ASTM D5147, and finished membrane performance by ASTM D6164/D6164M or EN 13956. The addition ratio is constrained by storage stability: at 8 wt% and 180 °C, phase separation can occur if agitation is stopped for more than 24 h. Terminal finished product types include modified-bitumen roofing membranes, tanking membranes, and below-grade waterproofing sheets.
In additive and color concentrate production, ELVAX 210W is used as a carrier resin at 10–70 wt% of the masterbatch formulation, depending on pigment type, surface treatment, and final let-down ratio. Compounding is conducted on a twin-screw extruder with an L/D ratio of 40:1 or 44:1, using barrel temperatures from 100 °C to 160 °C, a side feeder for fillers, and a vacuum vent at approximately -0.08 MPa. The low melt viscosity permits high loadings of titanium dioxide, carbon black, or organic pigments while maintaining strand integrity during pelletizing. Underwater pelletizing is preferred when melt viscosity at the die is below 1000 mPa·s; strand pelletizing is used for formulations with higher filler content. Screw speed and torque constraints are controlled by specific energy input of approximately 0.15–0.25 kW·h/kg; die plate temperature is held at 160–180 °C for underwater cutting and pellet water temperature is maintained at 20–40 °C. Incoming resin is checked for melt flow rate according to ISO 1133-1:2022; dispersion quality is evaluated by filter pressure rise or optical microscopy. Compliance is governed by REACH Regulation (EC) No 1907/2006, Directive 2011/65/EU RoHS, and, for toy and food-contact colorants, EN 71-3 and EU 10/2011 migration limits where applicable. Terminal finished product types include color masterbatch for polyolefin films, EVA foam concentrates, and additive concentrates for footwear compounds.
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ELVAX 210W ethylene vinyl acetate copolymer is a high-flow, low-molar-mass EVA resin with a nominal vinyl acetate comonomer content of 28 wt%. Melt mass-flow rate, determined in accordance with ISO 1133-1:2022 at 190°C under 2.16 kg, is published as 400 g/10 min; density, measured according to ASTM D1505, is 0.95 g/cm³. The material is supplied as solid pellet or pastille and is used in hot-melt adhesives, wax blends, solvent-borne coatings, and specialty compounding where low melt viscosity and rapid substrate wetting override high-temperature load-bearing requirements. The copolymer class is assigned CAS 24937-78-8.
Compared with lower-melt-index EVAs of similar vinyl acetate content, ELVAX 210W reduces melt viscosity significantly. Grades with melt indices in the 6 to 25 g/10 min range display higher tensile strength and greater creep resistance after solidification, but they require higher processing temperatures or additional solvent loading. The 400 g/10 min melt index of ELVAX 210W permits spray application, low-viscosity hot-melt coating, and high-speed mixing without the torque levels generated by higher-molecular-mass EVAs. The grade differs from 18 wt% vinyl acetate copolymers by showing increased polarity, lower crystalline fraction, and stronger interaction with polar films and rosin ester tackifiers. It differs from amorphous or higher-VA grades above 33 wt% by retaining a measurable polyethylene crystalline fraction, which helps reduce blocking during pellet storage and contributes solid-state stiffness below the melting region.
Table 1 is restricted to published melt-flow, composition, and density data. The listing does not imply identical tackifier compatibility or peel performance; those properties must be evaluated on a formulation-specific basis. The comparison illustrates the central difference between ELVAX 210W and structural-grade EVA copolymers: equivalent vinyl acetate content but markedly lower melt viscosity.
| Grade | Vinyl acetate (wt%) | Melt index (g/10 min, ASTM D1238, 190°C/2.16 kg) | Density (g/cm³, ASTM D1505) |
|---|---|---|---|
| ELVAX 210W | 28 | 400 | 0.95 |
| ELVAX 250 | 28 | 25 | 0.95 |
| ELVAX 260 | 28 | 6 | 0.95 |
The practical use of ELVAX 210W in packaging hot-melt adhesives is tied to its low melt viscosity. In a melting tank held at 150°C to 170°C, the grade reduces formulation viscosity more than a 25 g/10 min EVA at equivalent addition. This permits lower application temperature, reduced thermal degradation of rosin ester tackifiers, and improved wetting on high-speed folding carton lines. The trade-off is measured in hot shear holding power. Lap shear on bonded polyolefin substrates typically falls below that of lower-MI grades when test temperature exceeds 50°C; published data for this specific substrate configuration is limited and should be generated before specification.
In paraffin wax blends, additions of 2 wt% to 5 wt% ELVAX 210W modify flexibility and reduce brittleness without the high viscosity penalty of lower-MI EVAs. Viscosity response depends on wax melting point, oil content, and mixing history. At 5 wt% addition, the low molar mass preserves fluidity for curtain coating and laminating operations. Higher addition levels can reduce blocking resistance in coated paper applications and should be tested under the relevant end-use conditions.
The high melt index of ELVAX 210W corresponds to low zero-shear viscosity and limited shear thinning relative to higher-molecular-weight EVA. In a corotating twin-screw extruder, the polymer enters the screw with low feed-section pressure and melts rapidly. Equipment with an L/D ratio of 40:1 and moderate shear screw elements has been used for compounding with hydrocarbon resins and waxes, but published production data for this exact grade at that barrel configuration is limited. Because melt strength is low, strand pelletizing can present handling difficulty; water-ring or underwater pelletizing is generally more stable than strand cooling at high throughput.
Melt temperatures above 180°C should be avoided unless residence time is tightly controlled. Deacetylation of vinyl acetate accelerates under elevated temperature, producing acetic acid and shifting melt pH. Extended exposure above 180°C can generate gel particles and increase color. Nitrogen blanketing and stainless steel contact surfaces reduce the impact of acetic acid on equipment and melt quality. If ambient relative humidity exceeds 60%, pre-drying is required to prevent hydrolysis and void formation. Drying at 50°C is commonly applied for low-molecular-mass EVA, but exact drying time should be determined by moisture analysis; published moisture-uptake data specific to ELVAX 210W is limited.
At processing temperatures of 150°C to 170°C, screw speed changes produce smaller viscosity drops than with lower-MI EVA. This behavior supports gear-pump metering but can reduce self-wiping efficiency in short extruders. The thermal processing window is narrower than for a 6 g/10 min grade because the low molar mass lowers melt strength and permits faster surface flow, but it also reduces the maximum continuous service temperature of the finished compound. For hot-melt adhesive lines, melters should be controlled with close-set thermocouples and recirculated material should be minimized to prevent thermal history accumulation.
ELVAX 210W dissolves in coating and ink solvent systems under conditions that limit gel formation. Because of its low molar mass, solution viscosity in toluene, methyl ethyl ketone, or alcohol/ester blends is lower than that of a 6 g/10 min EVA at the same non-volatile solids level. This supports higher-solids ink vehicles or reduced solvent uptake. The 28 wt% vinyl acetate content increases dry-film polarity, improving adhesion to corona-treated polyethylene, polyester, and aluminum foil, but it also raises moisture sensitivity relative to 18 wt% VA copolymers. Solvent retention in printed or coated layers must be monitored by gas chromatography if final-article volatile content is regulated.
In wax-modification applications, the compatibility of ELVAX 210W with paraffin wax, microcrystalline wax, and Fischer-Tropsch wax depends on wax polarity and cooling rate. Rapid cooling can produce finer crystalline domains and less surface haze, but this must be confirmed by cloud point or optical microscopy. The low molecular weight of ELVAX 210W raises the diffusion coefficient of additives and oligomers in the matrix. Migration to film surfaces can occur under elevated storage temperatures; article-specific migration testing is required for food-contact or pharmaceutical applications.
Regulatory status must be confirmed against the specific formulation and final article. Table 2 summarizes standard designations applicable to the base polymer; additives, waxes, and tackifiers must be evaluated separately. The base polymer does not self-certify a formulated article for food contact or electrical-equipment use.
| Regulation or standard | Designation | Relevance |
|---|---|---|
| US FDA food contact | 21 CFR 177.1350 | Ethylene-vinyl acetate copolymers may be used as food-contact materials subject to extractive limitations and end-use conditions. |
| EU plastic food-contact materials | Regulation (EU) No 10/2011 | Overall migration limit of 10 mg/dm² applies unless specific migration limits control individual substances. |
| Melt flow test | ISO 1133-1:2022 / ASTM D1238 | 400 g/10 min at 190°C/2.16 kg. |
| Density test | ASTM D1505 / ISO 1183-1 | 0.95 g/cm³. |
| EU REACH | EC No 1907/2006 | The polymer as such is generally exempt from registration, but monomers and additives require registration; the SDS and substance-volume tracking documentation should be consulted. |
Applications requiring sustained load at service temperatures above 70°C or solvent-free structural adhesive performance are outside the practical boundary of ELVAX 210W. The grade is not recommended as the sole polymer in high-temperature pressure-sensitive adhesives, load-bearing structural adhesives, or wire and cable jacketing compounds where melt strength and thermomechanical stability are critical. In those applications, lower-melt-index EVAs or ethylene copolymers with higher molar mass provide higher creep resistance and should be selected after testing the final article to the relevant performance standard.
