| HS Code | 263761 |
| Vinyl Acetate Content Wt | 28 |
| Melt Flow Rate 190 C 2 16 Kg | 2.5 g/10 min |
| Density | 0.949 g/cm³ |
| Melting Point Dsc | 72 °C |
| Vicat Softening Point | 49 °C |
| Tensile Strength At Break | 23 MPa |
| Elongation At Break | 900 % |
| Flexural Modulus | 30 MPa |
| Shore D Hardness | 22 |
| Brittle Temperature | -100 °C |
As an accredited ELVAX 3182-2 Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ELVAX 3182-2 Ethylene Vinyl Acetate Copolymer is supplied as pellets in 25 kg polyethylene bags, palletized and protected for transport. |
| Container Loading (20′ FCL) | Load 20′ FCL with palletized 25kg bags of ELVAX 3182-2, shrink-wrapped, secured for safe transport. |
| Shipping | ELVAX 3182-2 is supplied as solid pellets in moisture-resistant bags or drums. Shipment requires standard dry cargo containers, away from heat, moisture, and direct sunlight. Not classified as hazardous goods for transport, but handling should prevent dust accumulation. Ensure adequate ventilation and secure loading to avoid bag damage during transit. |
| Storage | Store ELVAX 3182-2 in a cool, dry, well-ventilated area, away from direct sunlight, ignition sources, and strong oxidizers. Keep containers tightly sealed to prevent moisture absorption and contamination. Avoid temperatures above 30°C to prevent blocking or clumping. Use within recommended shelf life, and ground containers during handling to minimize static discharge. |
| Shelf Life | Store unopened in a cool, dry area away from sunlight. Shelf life is two years from date of shipment. |
ELVAX 3182-2, an ethylene-vinyl acetate copolymer carrying 28 wt% vinyl acetate and a melt index of 3.0 g/10 min under ISO 1133-1:2022 at 190 °C/2.16 kg, enters hot-melt adhesive compounding as a cohesive strength modifier for corrugated case sealing and bookbinding lines. In production-scale adhesive manufacture, the copolymer is blended at 32–38 wt% with 35–45 wt% hydrogenated C9 or rosin ester tackifier, 15–25 wt% microcrystalline wax, and 0.5–1.0 wt% hindered phenol antioxidant. The compounding vessel is a vertical sigma-blade mixer jacketed at 160–170 °C or a twin-screw extruder with L/D 30:1 and reverse-flight kneading blocks. Charging sequence controls batch-to-batch viscosity drift: EVA and tackifier are fluxed under nitrogen until torque stabilizes, microcrystalline wax is introduced in three equal cuts over 10–15 min to avoid viscosity collapse, and antioxidant is added during the final 5 min to limit antioxidant burn-off. The finished melt is filtered through 100–200 mesh screen packs and slabbed on a steel-belt cooler at 10–15 °C air temperature. Hot-melt application units with gear pumps and heated hoses operate at 160–180 °C; nozzle pressures of 8–15 bar are common on high-speed case erectors. Viscosity under ASTM D3236 at 180 °C typically falls between 800 mPa·s and 1600 mPa·s. Compliance for packaging adhesive use rests on FDA 21 CFR 175.105 for indirect food contact; EU 10/2011 applies when the adhesive layer is separated from food by a functional barrier. End-product types include corrugated carton sealing, side-seam bookbinding, case-making, and pallet stabilization. The operational boundary is a maximum residence time of 2 h at 200 °C; beyond this threshold, acetic acid evolution from vinyl acetate groups increases, shifting acid number and reducing adhesion to coated board.
Low-smoke zero-halogen sheathing compounds based on ELVAX 3182-2 encounter a processing threshold governed by the interaction between the copolymer’s 28 wt% vinyl acetate content and its 3.0 g/10 min melt index. The high vinyl acetate content raises polar interaction with alumina trihydrate and magnesium dihydrate surfaces, permitting higher filler loadings than low-VA polyethylene grades, but the low melt index increases compound viscosity at filler volume fractions above 0.55. In production-scale compounding, the formulation is processed on a co-rotating twin-screw extruder with L/D 40:1, barrel temperatures from 120 °C at the feed throat to 180 °C at the die, and screw speed of 250–350 rpm. A gravimetric side feeder introduces ATH downstream of the melt seal to prevent filler breakage in the melting zone; a vacuum vent is set at −0.08 MPa to remove moisture and acetic acid traces. The compound contains 100 phr polymer blend, of which ELVAX 3182-2 constitutes 20–40 wt% with the balance linear low-density polyethylene, plus 150–180 phr ATH, 3–5 phr zinc borate, and 0.5–1.0 phr antioxidant. Lower EVA addition reduces smoke; higher addition improves filler dispersion but may require a processing aid to control melt pressure. Finished cable sheathing is evaluated under IEC 60754-1:2011 for halogen acid gas evolution, IEC 61034-2:2019 for smoke density, and ASTM D638-14 for tensile properties. End-product types include LSZH sheathing for control, instrumentation, and data-center power cables. Pre-drying at 60 °C for 4 h is required when ambient RH exceeds 60%; barrel temperatures above 190 °C must be avoided because vinyl acetate decomposition produces acetic acid that corrodes downstream tooling.
| Standard | Measured property | Reference limit |
|---|---|---|
| IEC 60754-1:2011 | Halogen acid gas pH | ≥ 4.3 |
| IEC 60754-1:2011 | Conductivity of aqueous extract | ≤ 10 μS/mm |
| IEC 61034-2:2019 | Smoke density transmittance | ≥ 60% |
| IEC 60332-1-2:2015 | Vertical flame spread char height | ≤ 425 mm |
Paraffin and microcrystalline wax modifications with ELVAX 3182-2 are carried out in scraped-surface jacketed kettles or heated ribbon blenders at 90–110 °C. The copolymer pellets are introduced into the molten wax under low-shear propeller agitation at 200–300 rpm; addition must occur over 10–15 min because the 28 wt% vinyl acetate content creates a high-viscosity melt streak if pellets are dumped in a single charge. In candle manufacturing, ELVAX 3182-2 is added at 1–3 wt% of the total wax formulation to reduce oil migration, increase opacity, and raise resistance to surface cracking during cooling. For wax-coated paperboard intended for dry food contact, incorporation of 3–5 wt% in a paraffin/resin blend increases scuff resistance and fiber hold-out. Downstream processing consists of applying the wax-copolymer solution through curtain coaters, roll coaters, or dip tanks at 60–80 °C, followed by chilled-roller or water-bath cooling at 10–20 °C to set the surface. End-product types include container candles, tealights, wax-coated corrugated produce boxes, and laminated paper wrappers. Compliance in food-contact coated board is assessed under FDA 21 CFR 177.1350 for ethylene-vinyl acetate copolymers and FDA 21 CFR 176.170 for the finished coated paper or board; REACH governs industrial use in the EU. Melt temperatures above 150 °C cause measurable darkening and surface tack, while prolonged agitation at low temperature can build viscosity due to gel formation.
When a two-stage expansion process is used for footwear midsole stock, ELVAX 3182-2 functions as a high-strength modifier in a blend with lower-VA EVA foam grades rather than as the sole foaming resin. The compound is prepared on an internal mixer at 100–110 °C, then dropped to a two-roll mill with a friction ratio of 1:1.15 to incorporate azodicarbonamide blowing agent at 1.5–3.0 phr, dicumyl peroxide at 0.5–0.8 phr, zinc oxide at 0.5–1.0 phr, and zinc stearate at 0.4–0.8 phr. ELVAX 3182-2 is dosed at 15–25 wt% of the total polymer fraction; the higher vinyl acetate content increases melt strength sufficiently to reduce cell coalescence during expansion while the 3.0 g/10 min melt index permits blending with 18 wt% VA foam grades without phase separation. Slab foam production uses compression molding at 165–175 °C under 10–15 MPa for 8–12 min, followed by cooling to 40 °C before demolding; injection-molded foam soles require a mold temperature of 160–170 °C and vented tooling to release decomposition gases. End-product types include athletic shoe midsoles, casual footwear soles, and orthopedic cushioning inserts. Foam density is measured under ISO 845, hardness under ISO 868, and tensile properties under ASTM D638-14. Compliance is governed by REACH and, for US consumer goods, by applicable state-level reporting such as California Proposition 65 where relevant. Pre-drying at 50–60 °C for 3–4 h is required if storage RH exceeds 60% to prevent foaming defects from retained moisture.
Additive masterbatch carriers for polyolefin extrusion are compounded with ELVAX 3182-2 at 10–30 wt% of the masterbatch formulation, depending on active concentration and let-down ratio. The carrier grade’s 28 wt% vinyl acetate lowers crystallinity and permits dispersion of pigments and heat-sensitive additives at barrel settings of 120–160 °C, below the thermal history that a linear low-density polyethylene carrier would impose. Production equipment consists of a co-rotating twin-screw extruder with L/D 36:1, side-fed mineral filler or pigment, two atmospheric vents, one vacuum vent at −0.08 MPa, and underwater pelletizing at 10–15 °C water temperature. Color masterbatches based on this carrier typically carry 30–50 wt% pigment, UV-stabilizer masterbatches 15–25 wt% hindered amine light stabilizers, and flame-retardant masterbatches 50–60 wt% ATH or MDH. The resulting masterbatch is let down into blown film, injection molding, sheet extrusion, and extrusion coating at 2–5 wt%, with melt index evaluated under ISO 1133-1:2022. End-product types include pigmented polyethylene film, UV-stabilized agricultural film, halogen-free flame-retardant molding compounds, and appliance housing compounds. Regulatory references include REACH, RoHS 2011/65/EU as amended by EU 2015/863, and FDA 21 CFR 177.1350 for food-contact polyolefins subject to migration limits. The carrier is not suitable for engineering resins processed above 250 °C because vinyl acetate decomposition begins to generate acetic acid and causes screw corrosion.
Competitive ELVAX 3182-2 Ethylene Vinyl Acetate Copolymer prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615380400285 or mail to sales2@liwei-chem.com.
We will respond to you as soon as possible.
Tel: +8615380400285
Email: sales2@liwei-chem.com
Flexible payment, competitive price, premium service - Inquire now!
ELVAX 3182-2 is an ethylene-vinyl acetate copolymer resin marketed under the Elvax trademark. The base polymer carries CAS Registry Number 24937-78-8 and is produced by high-pressure radical copolymerization of ethylene and vinyl acetate. Within the supplier’s grade structure, the 3182 designation identifies a high-vinyl-acetate copolymer with a vinyl acetate content of 28 wt% and a melt flow rate of 25 g/10 min when measured at 190 °C under 2.16 kg load in ASTM D1238. The “-2” suffix is supplier-assigned and may distinguish the antioxidant package, pellet form, or release specification rather than a change in the base polymer composition. The product is used in hot-melt adhesives, sealants, wax-blend modification, polymer modification, and masterbatch carrier resins. The most significant differentiating element is the combination of moderately high vinyl acetate content and comparatively high melt index; this pairing reduces crystalline melting temperature, lowers melt viscosity, and increases polar adhesion to paper, metal, glass, and mineral fillers when compared with lower-vinyl-acetate or lower-melt-index EVA grades.
Vinyl acetate content controls the balance between crystalline ethylene sequences and amorphous polar sequences. At 28 wt% VA, the irregular acetoxy side groups reduce the length of crystallizable ethylene runs; the result is a lower DSC melting peak, lower yield stress, and higher elongation in ASTM D638 tensile specimens than an 18 wt% VA grade, while retaining greater thermal stability and higher cohesive strength than a 33 wt% VA grade. The polar side groups raise the solubility parameter and improve wetting on polar substrates without primer. In adhesive systems, this property allows tackifying resins such as rosin esters and terpene-phenolics to associate with the polymer rather than phase-separate; compatibility with paraffinic waxes remains sufficient for wax-blend clarity at low addition levels. The thermal shift is measured via ASTM D3418 as a DSC peak melting temperature near 73 °C, and via ASTM D1525 as a Vicat softening point near 48 °C. These values are typical, not specification limits, and they define the upper use temperature for load-bearing applications; above the Vicat softening point, the material softens and creeps under modest stress.
Specification data for ELVAX 3182-2 are summarized below using the supplier’s published typical values. The values should not be interpreted as guaranteed release limits; lot-specific certificates of analysis are required for release testing.
| Property | Typical value | Method |
|---|---|---|
| Vinyl acetate content | 28 wt% | Supplier infrared/thermogravimetric calibration |
| Melt flow rate | 25 g/10 min | ASTM D1238, 190 °C/2.16 kg |
| Density | 0.950 g/cm³ | ASTM D792 |
| DSC peak melting temperature | 73 °C | ASTM D3418 |
| Vicat softening point | 48 °C | ASTM D1525 |
The high melt flow rate of 25 g/10 min places the resin in the low-melt-viscosity region of the EVA product family. This is intentionally selected for adhesive compounding because it reduces motor demand in planetary mixers, shortens filler wet-out time, and permits low-pressure slot-die coating. The same property restricts the resin’s use in blown-film and extrusion-coating operations that require high melt tension; in those processes, a lower melt index grade is substituted or the grade is blended with a higher-molecular-weight EVA.
In hot-melt adhesive operations, the melt index is the primary viscosity control. ELVAX 3182-2 occupies an intermediate position between very fluid grades such as ELVAX 210 with a melt flow rate of 400 g/10 min and cohesive grades such as ELVAX 260A with a melt flow rate of 6 g/10 min. This comparison is shown below.
| Comparative parameter | ELVAX 210 | ELVAX 3182-2 | ELVAX 260A |
|---|---|---|---|
| Vinyl acetate content | 28 wt% | 28 wt% | 28 wt% |
| Melt flow rate | 400 g/10 min | 25 g/10 min | 6 g/10 min |
| Relative melt viscosity | Low | Intermediate | High |
| Relative adhesive cohesion | Low | Intermediate | High |
A production hot-melt formulation containing 30–40 wt% ELVAX 3182-2, 30–40 wt% tackifier, and 20–30 wt% wax can be applied at 160–180 °C through slot-die, wheel, or bead applicators. Hot-melt viscosity is commonly screened on a Brookfield Thermosel at 180 °C using ASTM D3236; target viscosity for packaging and labelling adhesives is application-specific but commonly falls between 500 mPa·s and 5000 mPa·s. The resin melts quickly and reaches stable viscosity faster than a 6 g/10 min EVA, but the lower molecular weight makes viscosity drift more visible during extended residence. High-melt-index EVAs also produce less die swell and lower wet strength immediately after application; cohesive strength develops as the adhesive cools and recrystallizes. This limitation explains why packaging adhesives subjected to elevated stress are often formulated with a blend of 25 g/10 min and 6 g/10 min EVA rather than the 25 g/10 min grade alone. The polar vinyl acetate groups promote adhesion to aluminum foil and steel, but they also increase surface free energy relative to low-VA EVA, which may require adjusted flame treatment or a co-surfactant in coated substrates. Published data for this specific configuration is limited; adhesive companies typically confirm open time, set time, peel adhesion, and shear adhesion using end-user standards.
Wax-blend modification is a separate processing regime. In paperboard coating and corrugated packaging, ELVAX 3182-2 is dissolved at 5–15 wt% in paraffin or microcrystalline wax held at 110–130 °C in jacketed stirred vessels. The copolymer reduces wax brittleness and improves heat-seal strength and flexibility. At addition levels above 15 wt%, viscosity increases substantially and coating weight control becomes more difficult on multi-roll coaters. In filler-containing sealants and masterbatches, the vinyl acetate groups wet calcium carbonate and titanium dioxide, reducing mixing time on 40:1 L/D co-rotating twin-screw extruders with high-shear kneading blocks. The resin lowers melt viscosity in the screw channels and can serve as a carrier resin for pigments and additives; however, it is not a universal carrier because its low melting point limits drying temperatures in masterbatch pellets. In flexible PVC modification, ELVAX 3182-2 acts as a processing aid and flexibilizer, but addition above 10 phr can reduce heat-distortion temperature and increase blocking. The exact ceiling is determined by the matrix and the final test specification; published data for this specific configuration is limited.
The critical process variable for ELVAX 3182-2 is not moisture but shear-generated temperature. Barrel setpoints between 150 °C and 190 °C are used on single-screw extruders with 24:1 to 30:1 L/D and on co-rotating twin-screw extruders with 40:1 L/D. High-shear kneading blocks can raise local melt temperature 20–30 °C above the barrel setting; therefore a barrel zone set to 180 °C can produce local melt temperatures above 200 °C, at which deacetylation of the vinyl acetate groups becomes measurable. The practical high-shear processing window narrows to 150–170 °C in aggressive twin-screw configurations. Deacetylation releases acetic acid, which shifts melt viscosity downward, creates odor, and corrodes downstream tooling; the degradation is autocatalytic and can be accelerated by acidic or alkaline contamination. Contact with amine-based additives should be evaluated before compounding because amine-based species may promote discoloration or interfere with antioxidant function. The supplier does not publish a full capillary viscosity curve for this grade in its standard datasheet; users requiring shear-viscosity data should request a lot-specific curve or generate data on a capillary rheometer per ISO 11443.
Pre-drying is not generally required for warehouse-stored resin. However, when cold pellets are moved into a humid processing area, surface condensation may cause steam splatter or voids. A desiccant drying step at 55–65 °C for 2–4 h is usually sufficient. In injection molding, the high melt flow rate permits filling of thin-wall parts at relatively low clamp force, but the low Vicat softening point requires longer cooling before ejection; parts can deform if ejected above 40–45 °C. In extrusion coating and blown-film operations, the low melt tension limits neck-in and bubble stability; these processes are not the intended use profile for this grade.
Regulatory status for ELVAX 3182-2 is tied to the base ethylene-vinyl acetate copolymer and the specific additive package. In food-contact applications, 21 CFR 177.1350 covers ethylene-vinyl acetate copolymers used in direct contact with food, but finished-article compliance depends on the formulation, end-use temperature, and migration testing. In the European Union, compliance is assessed under Commission Regulation (EU) No 10/2011; a finished article must be tested against the overall migration limit and the specific migration limit for vinyl acetate before commercial use. The resin is subject to REACH registration obligations and should be received with a current safety datasheet and regulatory certificate for the specific lot. For electrical and electronic products, RoHS restrictions apply to the homogeneous material only; the presence of heavy metals or brominated flame retardants must be evaluated in the final component. No conclusion regarding compliance is made from the typical physical property table; lot-specific documentation remains the only valid basis for release.
