| HS Code | 373010 |
| Vinyl Acetate Content | 32 wt% |
| Melt Flow Rate 190 C 2 16 Kg | 43 g/10 min |
| Density | 0.957 g/cm³ |
| Melting Point Dsc | 63 °C |
| Freezing Point Dsc | 42 °C |
| Vicat Softening Point | 54 °C |
| Tensile Strength At Break | 10.5 MPa |
| Elongation At Break | 800% |
| Shore Hardness A | 75 |
| Brittleness Temperature | -100 °C |
As an accredited ELVAX 150W Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged as 25 kg polyethylene-lined paper bags of off-white ethylene vinyl acetate copolymer pellets. |
| Container Loading (20′ FCL) | Twenty-foot full container load: ELVAX 150W EVA copolymer in 25kg bags, palletized and shrink-wrapped, securely loaded for efficient, safe transport. |
| Shipping | ELVAX 150W is shipped as solid pellets in sealed multi-wall bags or drums. Keep dry, away from moisture and direct sunlight. Store below 30°C to prevent agglomeration. Non-hazardous per transport regulations; use standard dry van containers. Avoid excessive dust generation during handling. |
| Storage | Store ELVAX 150W in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep the original container tightly sealed to prevent moisture pickup and contamination. Avoid stacking excessively high to prevent pellet deformation. Under proper conditions, shelf life is typically several years. |
| Shelf Life | Shelf life is typically two years from shipment if stored unopened, in a cool, dry place away from sunlight and heat. |
On high-speed packaging lines, ELVAX 150W, with a vinyl acetate content of 32 wt% and a melt mass-flow rate of 43 g/10 min per ASTM D1238, is metered into a co-rotating twin-screw extruder with a L/D 40:1 barrel, barrel set points of 90 °C in the feed throat rising to 140 °C at the die plate, and a screw-speed envelope of 250–400 rpm; the polymer is fed downstream of the tackifier melt to limit the residence time of the rosin ester at high temperature. A representative starting-point formulation contains 35 wt% ELVAX 150W, 40 wt% hydrogenated rosin ester, 24 wt% fully refined paraffin wax, and 1 wt% hindered phenolic antioxidant. Brookfield viscosity at 180 °C per ASTM D3236 falls between 1000 mPa·s and 1500 mPa·s; after 48 h at 180 °C under nitrogen, viscosity drift is held below 10% before measurable char formation is detected. The limiting processing constraint is the onset of acetic acid elimination above 220 °C, which produces die-lip corrosion and gel specks; melt lines are therefore maintained below 200 °C and total residence time is held under 30 min, with 100 μm screen packs installed upstream of the slot die. Applied at 20–60 g/m² coat weight on kraft and recycled board, the adhesive gives fibre-tearing bonds on carton side seams and book spines; low-temperature T-peel on polyethylene terephthalate film per ASTM D1876 is reported in the range 3–6 N/cm when tackifier loading is not less than 38 wt%. Published data for this specific ELVAX 150W configuration is limited, and the range reflects grade-comparable EVA hot-melt literature. For food-packaging end uses, the compounded adhesive is subject to FDA 21 CFR 175.105, with extractive limits evaluated under the intended use temperature.
A 1.0–5.0 wt% addition of ELVAX 150W to a fully refined paraffin wax raises Brookfield viscosity at 120 °C from 10–20 mPa·s to 50–180 mPa·s, depending on oil content, as measured by ASTM D3236; the increase is nonlinear and becomes pronounced above 3 wt% because the EVA-rich phase begins to form a continuous elastic network during cooling. The blend is prepared in jacketed melters fitted with turbine agitators running at 500–1000 rpm; the EVA pellets are added at 130–140 °C and held for 45–60 min to achieve full dissolution, after which the melt is filtered through 100 μm mesh to remove undispersed gel particles before transfer to coating pans. In corrugated board curtain coating, the terminal package performs as a water-vapour barrier at coat weights of 200–400 g/m²; water-vapour transmission rate measured by ASTM E96 at 38 °C/90% RH is reduced by 50–70% relative to the unmodified paraffin at equal coat weight. The wax-based coating falls under FDA 21 CFR 176.170 and 176.180 for direct food contact on paper and paperboard, with extractive limits determined by the food type and temperature of use.
The dissolution ceiling in methyl ethyl ketone is governed by the 32 wt% vinyl acetate content; at 25 °C, clear solutions are attainable up to 35 wt% solids, but the solution viscosity exceeds 5000 mPa·s at 30 wt% solids per ASTM D2196, which restricts gravure and reverse-roll transfer unless the solids are reduced to 20–25 wt%. Dissolution is conducted in closed, explosion-proof mixers at 40–60 °C; the polymer is added slowly to the solvent under agitation at 700–1000 rpm to avoid solvation lumps, and the solution is filtered through 50 μm bag filters after 4–6 h. Coating lines apply the solution to aluminium foil and polyester film at 2–6 g/m² dry coat weight; ovens at 70–100 °C with 3–5 s residence evaporate the solvent in a controlled lower-explosive-limit environment. Alcohol content above 10 wt% in the solvent blend causes turbidity and gelation, so ketone/ester solvent blends are kept below the measured cloud point by titration, and aromatic/aliphatic hydrocarbon ratios are governed by flash-point limits for the coating room. The terminal product is a heat-seal coating for pharmaceutical blister lidding and food lids; resinous coatings in food contact fall under FDA 21 CFR 175.300, with residual solvent levels validated by ICH Q3C where pharmaceutical packaging is concerned.
On polymer-modified bitumen units equipped with rotor-stator high-shear mills, ELVAX 150W is introduced into penetration-grade bitumen at 4–7 wt% at a mix temperature of 170–180 °C; the polymer is allowed to swell under low-shear agitation for 15–20 min, then dispersed for 30–60 min at rotor speeds of 3000–5000 rpm. The resulting two-phase morphology raises viscosity at 135 °C and modifies high-temperature rheological behaviour of the binder. Softening point per ASTM D36 rises from 46–52 °C to 60–75 °C; penetration at 25 °C per ASTM D5 drops from 70–100 dmm to 40–60 dmm; elastic recovery per ASTM D6084 improves from <10% to 30–60%. At temperatures above 200 °C, thermolytic acetic acid elimination from the vinyl acetate comonomer causes surface skinning and viscosity drift; storage tanks are therefore held at 160 °C under inert gas and low-shear paddle agitation to prevent phase separation during 72 h storage. The modified binder is applied in stone mastic asphalt under EN 14023 and in APP/SBS roofing membranes; the final products are road wearing courses and waterproofing membranes for low-temperature climates.
| Application segment | Primary compliance or test anchor | Critical control parameter |
|---|---|---|
| Hot-melt adhesive | FDA 21 CFR 175.105 | Melt temperature below 200 °C to limit acetic acid release |
| Wax-based paper/board coating | FDA 21 CFR 176.170, 176.180 | Filtration through 100 μm mesh to remove gel particles |
| Solvent-borne heat-seal coating | FDA 21 CFR 175.300, ICH Q3C | Alcohol content below 10 wt% to avoid gelation |
| Polymer-modified bitumen | EN 14023, ASTM D6084 | Storage temperature 160 °C under inert gas to delay phase separation |
| LLDPE sealant web | FDA 21 CFR 177.1520, 177.1350 | Heat-seal initiation shift from 110 °C to 85–95 °C |
| Crosslinked foam | REACH Candidate List, EN 71-9 | Blowing agent/crosslinking exotherm separation below 5–10 °C |
Compounding lines that dilute ELVAX 150W into linear low-density polyethylene for sealant web extrusion operate with a dry-blend loading of 15–25 wt% EVA in LLDPE; the blend is fed to a single-screw extruder with L/D 30:1 and a barrier screw at melt temperatures of 180–220 °C. The 43 g/10 min melt mass-flow rate per ASTM D1238 reduces blend viscosity and promotes wetting of aluminium foil in extrusion lamination at line speeds of 150–300 m/min; neck-in and draw resonance are reduced relative to neat LLDPE. Heat-seal initiation temperature shifts downward from 110 °C to 85–95 °C when measured by ASTM F2029, which permits sealing through contaminated or cool filling lines. Food-contact compliance is governed by FDA 21 CFR 177.1520 for the olefin continuous phase and 177.1350 for ethylene-vinyl acetate copolymers, subject to maximum extractable fractions and end-use temperature limits. The terminal product is extrusion-laminated flexible packaging for snack foods and medical pouches.
ELVAX 150W is brought into peroxide-crosslinked closed-cell foam compounds as a high-VA soft segment, blended at 20–40 phr with a lower-VA EVA grade, 2–4 phr azodicarbonamide, 0.5–1.0 phr dicumyl peroxide, and 1–2 phr zinc stearate. Mixing is performed in an internal mixer with ram pressure 0.5–0.7 MPa and a drop temperature below 110 °C to prevent premature peroxide decomposition; the compound is then calendered into preforms and expanded in a hydraulic press at 160–175 °C for 8–12 min. Differential scanning calorimetry at 10 °C/min is used to verify that the decomposition exotherm of the blowing agent does not precede the crosslinking exotherm by more than 5–10 °C; a mismatch greater than that produces split cells and density inversion. The 32 wt% VA content lowers Shore A hardness and increases compression set relative to lower-VA grades, while residual acetic acid can generate odour; zinc oxide at 1–2 phr is added as an acid scavenger when odour limits in finished footwear require it. Foam density below 0.15 g/cm³ is achieved only when blowing agent decomposition is matched to the crosslinking rate; terminal products are athletic footwear midsoles and impact pads, with azodicarbonamide classified under REACH Candidate List obligations and formamide testing under EN 71-9 for children's goods.
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Among ethylene vinyl acetate copolymers used in hot-melt adhesives and sealants, ELVAX 150W is a high vinyl acetate grade supplied by DuPont with a nominal vinyl acetate comonomer content of 32 wt% and a melt mass-flow rate of 43 g/10 min as determined by ASTM D1238 at 190 °C and 2.16 kg load. The copolymer is supplied as translucent pellets and has a nominal density of 0.96 g/cm³ when measured by ASTM D1505 or ASTM D792. The resin falls under CAS registry number 24937-78-8 and is used where polarity, low-temperature flexibility, and melt processability must be balanced against cohesive strength and thermal stability. Its high vinyl acetate content relative to low-density polyethylene and low-VA EVA grades shifts the solubility parameter toward polar solvents and improves adhesion to metals, glass, polyesters, and cellulosic substrates without the high tack of 40 wt% VA copolymers. Published data for this specific configuration is limited where exact tensile and hardness values are concerned; however, typical EVA grades at 32 wt% VA exhibit a broad melting endotherm between 40 °C and 80 °C under differential scanning calorimetry according to ASTM D3418.
Hot-melt adhesive compounding with ELVAX 150W typically employs a jacketed sigma-blade mixer or a twin-screw extruder with an L/D ratio of 40:1 or greater, operating between 150 °C and 190 °C. At these temperatures the melt viscosity is governed by the 43 g/10 min melt flow rate and the temperature dependence of the copolymer. Prolonged holding in bulk tanks without inert gas blanketing can produce viscosity drift through thermo-oxidative chain scission and crosslinking. Antioxidant packages based on hindered phenols or phosphite synergists are commonly added at 0.1–0.5 phr; the exact loading is determined by pot life trials using a heated rotational viscometer operated under ASTM D3236. Because the resin has a high vinyl acetate content, it is more susceptible to thermal deacetylation than lower-VA EVA grades. Acetic acid evolution increases acidity and can corrode unplated mild steel surfaces; therefore, stainless steel or nickel-plated equipment is preferred for continuous operation above 170 °C. Production-scale mixing vessels with wall scrapers reduce the accumulation of degraded polymer gel that otherwise leads to filter screen plugging and viscosity drift. Viscosity stability at 180 °C over 72 h should be tested in the actual adhesive formulation, because tackifier resins and waxes can accelerate degradation through acid-catalyzed pathways.
| Property | Value | Test method |
|---|---|---|
| Vinyl acetate content | 32 wt% | Manufacturer technical data sheet |
| Melt mass-flow rate | 43 g/10 min | ASTM D1238 at 190 °C, 2.16 kg |
| Nominal density | 0.96 g/cm³ | ASTM D1505 |
| Physical form | Translucent pellets | Not applicable |
Because the vinyl acetate content is 32 wt%, the copolymer retains a lower crystalline fraction than EVA grades with 18 wt% or 25 wt% vinyl acetate. Differential scanning calorimetry shows a reduction in heat of fusion and a lowering of the peak melting temperature; this translates to lower Shore hardness and tensile modulus when measured under ASTM D2240 and ASTM D638, respectively. The higher polarity improves peel adhesion to polar films such as corona-treated polyethylene terephthalate and aluminum foil. At the same time, the resin remains less tacky and more cohesive at ambient temperature than a 40 wt% VA EVA grade, which is relevant for sealant formulations where blocking resistance and shear strength matter. Infrared analysis under ASTM D5594 can quantify the vinyl acetate content on incoming lots; a variation of even 1 wt% shifts polarity and melt behaviour enough to alter adhesive performance. Comparative testing under end-use conditions is required before substituting ELVAX 150W for a lower-VA grade; published data for specific tensile, peel, and shear values in formulated systems is limited.
The melt mass-flow rate of 43 g/10 min places ELVAX 150W in the high-flow segment for EVA copolymers. In extrusion coating and laminating operations, the resin is processed through a single-screw extruder with a barrier screw and an L/D ratio from 24:1 to 30:1 at barrel temperatures from 150 °C to 210 °C. Because the melt flow rate is high, the resin is less suitable for blown film extrusion that requires high melt strength; bubble instability can occur at drawdown ratios above 2.5:1. For cast film and extrusion coating, the low melt strength is offset by high line speeds and thin gauge control. Capillary rheometry under ASTM D3835 at 190 °C typically shows shear-thinning behaviour, with viscosity decreasing as shear rate increases from 100 s⁻¹ to 1000 s⁻¹. The addition of tackifier resins and paraffin waxes further reduces viscosity and shifts the processing window; a hot-melt formulator may observe a reduction in apparent viscosity of one to two orders of magnitude at 180 °C when tackifier loading reaches 50 phr. Such reductions are formulation-specific and must be verified by rotational viscometry rather than extrapolated from neat resin data.
Under high-shear dispersion in solvent-borne adhesive manufacturing, ELVAX 150W is dissolved in aromatic hydrocarbons, esters, or ketones. Typical solution concentrations range from 20 wt% to 40 wt% solids depending on the solvent system and target coating viscosity. The 32 wt% vinyl acetate comonomer improves solubility in ketones and esters relative to low-VA EVA grades, but the resin remains insoluble in aliphatic hydrocarbons unless blended with co-solvents. Coating formulations based on methyl ethyl ketone or ethyl acetate are used for laminating films and priming metal substrates. Drying rate and solvent release are governed by solvent vapour pressure, not by the resin; however, high vinyl acetate content can retain polar solvents more strongly than low-density polyethylene. Residual solvent can be measured by gas chromatography following ASTM D2369 or ISO 3231. High-shear mixing in a Cowles disperser at 1000–3000 rpm accelerates dissolution, but prolonged high-shear mixing above 40 °C can mechanically degrade the polymer and reduce solution viscosity. Jacketed vessels with temperature control at 30–40 °C are therefore used to balance dissolution rate and molecular weight retention.
In sealant applications, replacement of a lower-VA EVA grade with ELVAX 150W alters the balance of adhesion, flexibility, and cohesive strength. The higher polar character improves wetting on concrete, glass, and anodized aluminum. The lower crystallinity reduces resistance to creep at elevated temperatures; a sealant formulated with ELVAX 150W may exhibit higher slump above 60 °C than one using an EVA with 18 wt% VA. Compounding with precipitated calcium carbonate or fumed silica at 5–15 phr can restore the yield stress and reduce slump. Plasticizer migration from PVC substrates into EVA sealant can be more rapid with ELVAX 150W because the polar vinyl acetate groups have higher affinity for phthalate and non-phthalate plasticizers; this can lead to softening and loss of adhesion over time. Accelerated aging under ASTM G154 UV exposure or ISO 4892-2 can be used to evaluate the combined effect of plasticizer migration, oxidation, and UV degradation. Antioxidant and UV stabilizer packages must be selected to avoid amine-based stabilizers that can accelerate deacetylation and discoloration. Peel and shear adhesion in formulated sealant systems can be measured by ASTM D1876 and ASTM D1002 respectively.
A direct substitution of ELVAX 150W for ethylene ethyl acrylate or ethylene methyl acrylate is not recommended without reformulation. Ethylene methyl acrylate retains a higher thermal stability ceiling than EVA; under sustained exposure above 220 °C, EVA releases acetic acid, while EMA does not. In applications requiring repeated autoclave cycles at 121 °C or hot-fill conditions, EVA may lose adhesion due to hydrophilic uptake and hydrolysis of acetate groups. The density and melt flow of ELVAX 150W are similar to some EMA grades, but the polar solubility parameter differs. EVA is generally more compatible with rosin ester tackifiers, whereas EMA may require hydrocarbon resins. For wet or high-humidity service, moisture absorption can be evaluated by immersion in water at 95 °C following ASTM D870 or ISO 2812-1; published data for this specific configuration is limited, so end-use testing is required. In polymer modification of low-density polyethylene, additions of 5–20 wt% ELVAX 150W can improve stress-crack resistance and adhesion to polar layers, although the high melt flow may reduce melt strength in blow molding.
| Regulation or standard | Relevant scope | Verification requirement |
|---|---|---|
| FDA 21 CFR 177.1350 | Ethylene-vinyl acetate copolymers for food contact | End-use extraction limits and food type restrictions apply; manufacturer certification required |
| EU 10/2011 | Plastic materials and articles intended for food contact | Overall migration limit 10 mg/dm²; specific migration testing required for finished article |
| REACH (EC 1907/2006) | Registration and SVHC disclosure | Consult safety data sheet for registration status and candidate list substances |
| RoHS 2011/65/EU | Lead, cadmium, mercury, hexavalent chromium, PBB, PBDE restrictions | Resin typically not expected to contain restricted substances; verify via supplier analytical report |
