| HS Code | 770355 |
| Vinyl Acetate Content | 32 wt% |
| Melt Flow Rate 190 C 2 16 Kg | 43 g/10 min |
| Density | 0.960 g/cm³ |
| Melting Point Dsc | 75 °C |
| Tensile Strength At Break | 13 MPa |
| Elongation At Break | 850% |
| Flexural Modulus | 34 MPa |
| Shore A Hardness | 80 |
| Vicat Softening Point | 58 °C |
| Brittleness Temperature | -70 °C |
As an accredited Elvax 150W EVA Copolymer Resin,Adhesive & Coating Grade factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Elvax 150W EVA copolymer resin packaged as free-flowing pellets in 25 kg multiwall paper bags, 40 bags per pallet. |
| Container Loading (20′ FCL) | 20′ FCL: Elvax 150W EVA resin packed in 25kg bags on pallets, loaded for safe, efficient transport. |
| Shipping | Elvax 150W EVA Copolymer Resin ships as solid pellets in sealed multi-wall bags, fiber drums, or boxes to prevent moisture contamination. Transport via standard truck or ocean freight in dry containers, kept away from heat and ignition sources. No hazardous goods classification under normal conditions; store cool and dry. |
| Storage | Store Elvax 150W in a cool, dry, well-ventilated area away from direct sunlight, heat, and open flames. Keep containers tightly sealed to prevent moisture pickup, dust accumulation, and contamination. Maintain moderate ambient temperatures to avoid softening or clumping. Ensure storage area is clean and free from oxidants, with appropriate fire extinguishing equipment readily available. |
| Shelf Life | Shelf life is typically two years if stored in a cool, dry area away from direct sunlight and heat. |
Elvax 150W is an ethylene-vinyl acetate copolymer resin with nominal vinyl acetate content of 32 wt%, melt index of 43 g/10 min under ASTM D1238 / ISO 1133-1:2022 at 190 °C/2.16 kg, and density of 0.95 g/cm³ under ASTM D792. The 32 wt% vinyl acetate fraction reduces polyethylene crystallinity relative to EVA grades below 18 wt% vinyl acetate and is specified in adhesive and coating formulations requiring lower melt modulus and controlled solubility. The scenarios below cover only production-scale downstream routes for this grade; each scenario states the governing compliance standard, addition ratio, downstream production process, and terminal article type.
On high-speed corrugated case sealing lines running above 45,000 cases per 8 h shift, the adhesive is applied through slot nozzles at 160–180 °C and compressed within 0.2–0.6 s before fiber-tearing bond must develop. A formulation containing Elvax 150W at 30–38 wt%, rosin ester tackifier at 35–45 wt%, paraffin or microcrystalline wax at 15–25 wt%, and hindered phenolic antioxidant at 0.5–1.0 wt% produces target Brookfield viscosities of 700–1,500 mPa·s at 180 °C under ASTM D3236, which keeps nozzle starve and stringing within normal line control. Heated hoses are maintained at 160–170 °C with nozzle standoff of 2–5 mm; if compression time falls below 0.2 s, molten adhesive cannot wet fiber sufficiently, while open time above 2 s permits surface skin formation and weak bond development. Compounding is conducted on a twin-screw extruder with 48:1 L/D ratio, with barrel zones from 120 °C to 160 °C and die temperature of 150–170 °C; production-scale equipment behavior includes char accumulation on screw flights and die lips when melt temperature is held above 200 °C for more than 2 h because deacetylation of the vinyl acetate comonomer releases acetic acid, accelerates viscosity drift, and deposits carbonized residue. Compliance for incidental food contact on carton sealing is governed by FDA 21 CFR § 175.105 for dry and aqueous food packaging, with European supply chains also requiring REACH registration and SVHC screening. The terminal product type is sealed corrugated cartons and beverage multipack wraps used in frozen food, dry grocery, and bottle group packaging.
Extrusion coating of Elvax 150W as a heat-seal layer on aluminum foil, paper, or oriented polypropylene requires balancing the resin’s 32 wt% vinyl acetate content and 43 g/10 min melt index against melt temperature limitations. In sealant-layer formulations, Elvax 150W is used at 70–100 wt% with LDPE letdown at 0–30 wt%, erucamide slip additive at 500–1,500 ppm, and silica antiblock at 1,000–3,000 ppm; higher EVA fractions reduce seal initiation temperature but narrow the draw resonance window. The downstream process is coextrusion coating on a 90 mm single-screw extruder with barrel profile 180–215 °C, feedblock and coat-hanger die at 210–220 °C, die lip gap of 0.7–1.0 mm, air gap 100–200 mm, and coating weight 10–25 g/m² at line speeds 150–300 m/min. Plant-scale behavior includes edge bead thickening and draw resonance when EVA 150W content exceeds 85 wt% at line speeds above 250 m/min; published data for the exact threshold on individual die geometries is limited, requiring a line-specific ramp study. The melt must remain below 215 °C to limit deacetylation; barrel venting and corrosion-resistant screw materials are specified because acetic acid by-products accelerate surface oxidation on nitrided surfaces. Regulatory compliance for food-contact sealant webs follows EU Regulation 10/2011 and FDA 21 CFR § 177.1350 for ethylene-vinyl acetate copolymers, with migration testing per the EN 1186-series when fatty or aqueous simulants are used. The terminal product type is lidding film and aseptic carton inner sealant webs, where cold-flex crack resistance must be retained after secondary forming at 4–8 °C.
Perfect-binding lines running at 8,000–15,000 cycles/h apply hot melt to spine and hinge zones at 150–175 °C, with side glue film thickness of 0.2–0.4 mm and compression set intervals of 3–8 s. The formulation for Elvax 150W in this segment is 35–45 wt% EVA 150W, 30–40 wt% rosin ester or terpene-phenolic tackifier, 10–20 wt% Fischer-Tropsch wax, and 0.5–1.0 wt% hindered phenolic antioxidant. The relatively high EVA fraction compared with packaging hot melts is selected for notch penetration into uncoated and coated paper stocks; field data from spine-cracking tests show fractures initiate below −5 °C when the EVA content falls below 35 wt% or when the Fischer-Tropsch wax fraction exceeds 20 wt%. Production equipment is typically a stainless steel pre-melter feeding a gear pump and wheel or slot nozzle applicator; char exists as cartridge filter clogging if the adhesive is held above 180 °C for more than 4 h. For children’s book formats, the dried adhesive film must meet EN 71-3:2019+A1:2021 migration limits for toxic elements, and general EU supply requires REACH Annex XVII compliance. The terminal product type includes perfect-bound paperback books, layflat photo books, and annual report spines where repeated page flexure causes tensile fatigue across the hinge.
Solvent-borne laminating adhesives for aluminum foil-to-low-density polyethylene pouch structures require dry-film bond strength after 48 h cure and low residual solvent retention because the laminate may enclose acidic or fatty foods. A typical adhesive solution is prepared by dissolving Elvax 150W at 25–35 wt% solids in a toluene/ethyl acetate 60:40 solvent blend, with the dried film containing 75–90 wt% Elvax 150W, 10–25 wt% rosin ester or hydrocarbon tackifier, and 0.2–0.5 wt% hindered phenolic antioxidant. The downstream process uses a high-shear dissolver at 1,500 rpm and jacketed vessel temperature of 35–50 °C, followed by gravure roller application with cell volume 30–60 cm³/m²; drying ovens run 60–80 °C in three zones, and lamination nip temperature is 70–90 °C with nip pressure 0.4–0.8 MPa. Production-scale failure modes include adhesive pick-off on gravure rolls when solution viscosity exceeds 500 mPa·s at 25 °C, which occurs when solids rise above 35 wt% or when solvent evaporation in open troughs shifts the solvent ratio toward toluene. Residual solvent must comply with EU Regulation 10/2011 overall migration limit of 10 mg/dm² for food-contact articles, while food-contact adhesive use is also assessed under FDA 21 CFR § 175.105. The terminal product type is dry-laminated foil pouches for condiments, pharmaceutical unit-dose sachets, and cosmetic sample laminates.
Corrugated tray waxing operations for iced poultry and seafood produce waterproof boxes that must survive cold-chain water contact and mechanical scuffing. Elvax 150W is melt-blended into paraffin wax at 7–15 wt% together with microcrystalline wax at 5–10 wt%; the paraffin wax balance is 78–88 wt%. This addition range raises low-temperature flexibility enough to reduce flaking at score lines, but above 20 wt% EVA 150W the melt exhibits phase separation and Brookfield viscosity exceeds 250 mPa·s at 120 °C under ASTM D3236, which on older curtain coater heads causes curtain breakup and uneven coating weights. The production process is a jacketed agitated kettle at 130–150 °C, followed by a cascade or curtain coater running at 120–160 °C, water-cooled quench at 5–15 °C, and target coating weight of 8–15 g/m² measured by gravimetric difference. Coefficient of friction on the finished board is adjusted to 0.25–0.40 under ASTM D1894 to maintain stack handling without slip sheet intervention. Compliance for food contact paperboard falls under FDA 21 CFR § 176.170 for aqueous and fatty food types, and European supply chains apply REACH and German BfR paper and board recommendations if the trays enter EU retail markets. The terminal product type is waxed corrugated trays and boxes used for iced poultry, seafood, and fresh produce distribution.
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Elvax 150W EVA Copolymer Resin, Adhesive & Coating Grade is supplied in pellet form and is specified for hot-melt adhesive, solvent-based coating, and wax-blend modification. The grade carries a nominal vinyl acetate comonomer content of 32 wt%, a melt index of 43 g/10 min measured under ASTM D1238 at 190°C with 2.16 kg load, and a solid density of 0.95 g/cm³ determined by ASTM D1505 or ISO 1183-1:2019. These three parameters define the specification envelope: comonomer fraction controls polarity, melt index controls flow, and density reflects reduced crystalline packing. The random incorporation of 32 wt% vinyl acetate along the polyethylene backbone shortens crystallizable ethylene sequences, lowers the melting range, and increases solubility in aromatic, ketone, and ester solvents relative to lower-VA ethylene-vinyl acetate grades. The resin is therefore positioned between low-VA extrusion/lamination resins and high-VA coating resins in the supplier’s adhesive and coating product portfolio.
| Property | Test Method | Nominal Value |
|---|---|---|
| Vinyl acetate comonomer content | ASTM D5594 | 32 wt% |
| Melt index | ASTM D1238 / ISO 1133-1:2022, Procedure A, 190°C, 2.16 kg | 43 g/10 min |
| Density | ASTM D1505 / ISO 1183-1:2019 | 0.95 g/cm³ |
For adhesive and coating grades, tensile and peel data on the neat resin are less decisive than melt index and vinyl acetate content. Compounded formulations are tested under ASTM D903, ASTM D1002, or ASTM D1876 according to end-use substrate. Published data for the unbonded ultimate tensile strength of Elvax 150W is limited because the grade is supplied for formulated systems rather than as a stand-alone structural polymer.
At 32 wt% vinyl acetate, the copolymer has a lower crystalline fraction than low-VA grades in the 18–20 wt% range, which reduces elastic modulus and shifts failure from brittle to ductile in thin adhesive layers. The glass transition remains below −20°C, so low-temperature flexibility is retained in packaging and bookbinding applications. The polar acetate carbonyl groups increase interactions with aluminum, corona-treated polyester, and paper fiber; however, adhesion to untreated polyolefins remains diffusion-limited. In hot-melt adhesives, Elvax 150W functions as the base polymer rather than the tack source. Cohesive strength in the final formulation is dominated by tackifier softening temperature and wax crystal network. Standard ASTM D903 T-peel testing on stainless steel is used to balance interface adhesion and cohesive failure; a shift from peel failure to cohesive stringing often occurs when rosin ester tackifier loading exceeds 40 wt% of the total adhesive. Published data for this exact threshold in every formulation is limited because substrate preparation and coating weight alter the transition.
Hot-melt adhesive compounding with Elvax 150W places the resin at 20–35 wt% of the total formulation. Twin-screw extrusion with L/D 48:1, modular kneading blocks, and vacuum devolatilization is used on production lines because the low melt viscosity can cause insufficient shear in single-screw equipment. Barrel set points of 120–160°C and screw speed of 250–400 rpm are typical starting conditions; the melt temperature should not exceed 180°C to limit vinyl acetate ester degradation. Slot-die coating lines operating at 150–200 m/min use gear-pump pressure control to compensate for ±5% batch-to-batch melt index variation. The lower molecular weight of Elvax 150W reduces melt strength; formulators seeking higher heat resistance in low-pressure bonding often blend the grade with a low-MI EVA at 10–15 wt% addition while retaining the melt-flow contribution of Elvax 150W. In high-speed carton and case-sealing lines, the resin permits clean nozzle cut-off because its low melt strength reduces stringing at application temperatures between 150°C and 170°C; however, pot stability above 180°C becomes the limiting parameter rather than application viscosity.
Solvent-based coating lines employ Elvax 150W because the high vinyl acetate fraction permits dissolution in toluene, xylene, methyl ethyl ketone, and ethyl acetate at 40–60°C under high-shear mixing. Lower-VA EVA grades of equivalent melt index require higher temperatures or chlorinated co-solvent additions. At 20 wt% resin solids in toluene, the solution is pseudoplastic; Brookfield viscosity is measured with an RV spindle series at 25°C after 24 h equilibration because chain disentanglement time influences apparent viscosity. Reverse-roll and comma coating equipment benefit from low die swell and reduced ribbing defects. Drying of films above 25 μm dry film thickness requires staged ovens at 60°C, 90°C, and 120°C to reduce residual solvent below 1 wt%; forced-air velocity above 5 m/s at the wet layer is typical but is not a product constant. The low molecular weight of Elvax 150W also lowers solution elasticity, which can reduce edge bead rupture during coating start-up; this advantage is offset by lower extensional viscosity during fiber coating, where high-molecular-weight EVA may be preferred.
Adhesion to low-density polyethylene and untreated polypropylene remains limited without surface oxidation. Corona discharge treatment to a wetting tension of 38–42 mN/m is usually specified; flame treatment is an alternative for irregular profiles. On aluminum foil, the vinyl acetate carbonyl groups interact with surface hydroxyls but do not form covalent bonds; primers such as epoxy silane are required for retort or hot-water immersion performance. On paper and cellulosic substrates, the grade can penetrate fiber voids at coating temperatures of 150–170°C, increasing mechanical interlocking but also increasing strike-through if viscosity falls below 1000 mPa·s.
In wax-based coatings, investment casting patterns, and paper saturants, Elvax 150W is added at 2–10 wt% to paraffin or microcrystalline wax to reduce brittleness and improve low-temperature flex resistance. The resin does not fully co-crystallize with long-chain n-paraffin; differential scanning calorimetry under ASTM D3418 shows a broad melting endotherm and a lowering of the sharp paraffin solid-solid transition. The congealing point of the blend, tested under ASTM D938, increases as the resin content approaches 10 wt%; beyond 15 wt% addition, phase inversion may occur, producing a tacky surface that complicates release from slush-molding tooling. In cone-and-plate viscometry at 100°C, the molten wax-EVA blend shifts from Newtonian to shear-thinning as the EVA forms a dispersed elastomer-rich phase. This behavior is used to control sag resistance in dip-coating operations but reduces effectiveness of filtration through 100 μm mesh filters when the EVA phase remains undispersed. Published data for the exact phase-inversion point in complex commercial wax blends is limited; the 15 wt% boundary should be validated on the specific paraffin grade and cool-down profile used in production.
Elvax 150W occupies a narrow formulation window between low-VA structural grades and high-VA coating resins. The comparison below is based on nominal property ranges for typical adhesive and coating EVA types; lot-specific certificates should be used for specification limits.
| Characteristic | Elvax 150W | Low-VA adhesive grade | High-VA coating grade |
|---|---|---|---|
| Vinyl acetate content | 32 wt% | 18–20 wt% | 40 wt% |
| Melt index | 43 g/10 min | 5–10 g/10 min | 50–55 g/10 min |
| Density | 0.95 g/cm³ | 0.93–0.94 g/cm³ | 0.96–0.97 g/cm³ |
| Toluene solubility at 25°C | Partial; full at 40–60°C | Limited unless heated | High |
| Polar substrate adhesion | Moderate | Lower | Higher |
| Melt viscosity at 190°C | Low | Higher | Low to very low |
| Typical packaging/coating role | Adhesive and coating backbone | Higher-cohesion modifier | High-polarity coating and tie-layer modifier |
The difference between Elvax 150W and lower-VA grades is not solely polarity. Melt index also controls wetting speed and penetration into porous substrates. A lower-MI EVA with similar VA content forms higher molecular weight networks, giving higher cohesive strength but requiring higher processing temperature and shear. A higher-MI high-VA grade may offer better solubility and adhesion to polar substrates, but its lower molecular weight reduces heat resistance and can cause tackifier bleed in aged bonded assemblies. Elvax 150W is therefore selected when the formulator requires a balance of low melt viscosity, moderate polarity, and solubility in standard solvent systems without the high-temperature processing burden of low-MI ethylene-vinyl acetate copolymers.
Formulations based on Elvax 150W may be assessed under FDA 21 CFR 175.105 for food-contact adhesives and 21 CFR 177.1350 for ethylene-vinyl acetate copolymer food-contact articles, provided the migration and end-test criteria of the referenced sections are satisfied. European food-contact assessment uses EU 10/2011 for overall migration and specific migration of vinyl acetate monomer; REACH registration status should be confirmed on the supplier’s safety data sheet, and RoHS directive 2011/65/EU restricts cadmium, lead, mercury, and hexavalent chromium in electrical and electronic applications. The main incompatibility is with strong oxidizing agents and amine-based additives at processing temperatures above 180°C; basic amine species can accelerate ester hydrolysis and release acetic acid, increasing corrosion risk in downstream die and roll equipment. This boundary is especially relevant in high-speed adhesive coating where recycled process trim may carry residual amine-functional inks or coatings into the melt loop.
Pre-drying at 60°C for 2–4 h is recommended when pellets have been exposed to relative humidity above 60%. Storage in sealed containers below 40°C and inert-gas blanketing of bulk conveying lines reduce moisture pickup and oxidative yellowing. In hot-melt tanks, prolonged residence time above 180°C can produce detectable acetic acid within 4–8 h; thermal stabilizers extend the hold time but may reduce peel adhesion when added above 0.5 wt%. Equipment cleanout after processing Elvax 150W should be performed with a low-MI polyethylene purge rather than high-acid purges to avoid cross-contamination of subsequent low-VA extrusion runs.
