| HS Code | 573697 |
| Product Name | ELVAX 150 Ethylene Vinyl Acetate Copolymer |
| Chemical Family | Ethylene Vinyl Acetate (EVA) Copolymer |
| Vinyl Acetate Content | 32 wt% |
| Melt Flow Index 190 C 2 16kg | 43 g/10 min |
| Density 23 C | 0.957 g/cm3 |
| Melting Point Dsc | 65°C |
| Vicat Softening Point | 54°C |
| Tensile Strength At Break | 12 MPa |
| Elongation At Break | 800% |
| Hardness Shore A | 85 |
| Glass Transition Temperature | -35°C |
| Brittleness Temperature | -100°C |
| Refractive Index | 1.48 |
As an accredited ELVAX 150 Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ELVAX 150 Ethylene Vinyl Acetate Copolymer is supplied as free-flowing pellets in 25 kg multi-layer paper bags. |
| Container Loading (20′ FCL) | 20' FCL loading of ELVAX 150 EVA copolymer: palletized bags shrink-wrapped, securely braced, ventilated, protected from moisture and direct heat. |
| Shipping | ELVAX 150 ships as non-hazardous ethylene vinyl acetate copolymer pellets in sealed bags or containers. Store in a cool, dry, well-ventilated area away from direct sunlight, heat, flames, and strong oxidizers. Keep packaging intact to prevent moisture contamination, dust accumulation, and static discharge. Avoid excessive stacking to prevent bag deformation. |
| Storage | Store ELVAX 150 Ethylene Vinyl Acetate Copolymer in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and oxidizing agents. Keep containers tightly closed to prevent moisture and contamination. Avoid prolonged exposure to high temperatures and dust accumulation. Under these conditions, shelf life remains stable for an extended period. |
| Shelf Life | Under recommended storage conditions, ELVAX 150 has a shelf life of at least 2 years, retaining its properties. |
In case and carton sealing lines operating at 150–180 °C, ELVAX 150 Ethylene Vinyl Acetate Copolymer functions as the elastic backbone of hot-melt formulations because its 32% vinyl acetate content lowers crystallinity and broadens compatibility with hydrogenated rosin esters and Fischer-Tropsch waxes. The melt index of 43 g/10 min measured under ASTM D1238-20 or ISO 1133-1:2022 permits sufficient wetting of recycled corrugated board without excessive stringing, but thermal degradation of the acetate group—not base viscosity—is the main source of viscosity drift in production. Formulation data from industrial adhesive operations indicate ELVAX 150 is compounded at 25–40 wt% with tackifier resins at 30–45 wt%, paraffin or microcrystalline wax at 15–30 wt%, and hindered phenolic antioxidant at 0.3–1.0 wt%. Typical manufacturing uses a twin-screw extruder with L/D ratio 44:1, barrel zones set from 90–120 °C in the feed section to 160–190 °C at the die, a gear pump fitted to a slot-die coater applying 100–300 g/m² onto kraft liner. Compliance for food-contact case sealing falls under 21 CFR 175.105 and, where the EVA layer is a functional barrier subject to extraction limits, 21 CFR 177.1350; viscosity control is tested by ASTM D3236-88 at 180 °C, peel adhesion by ASTM D1876-08, and ring-and-ball softening point by ASTM E28-18. Finished products include corrugated box and tray erection, carton closure, and bookbinding spine adhesion. Pre-drying at 60 °C for 4 h is required when surface moisture exceeds 0.10%; barrel residence above 200 °C for more than 20 min accelerates acetic acid release and lowers peel adhesion after aging.
Melt-blending ELVAX 150 into paraffin moisture-barrier coatings for corrugated board and flexible food wrap at 2–10 wt% of the total wax blend raises blocking resistance, flex crack resistance, and gloss without pushing low-temperature application viscosity above curtain-coating limits. The blend is processed in a jacketed kettle with a low-shear propeller agitator at 120–140 °C, then filtered through a 200 µm mesh and applied by a curtain coater running at 120–160 m/min to kraft or bleached paperboard. At addition levels above 8 wt%, viscosity build measured by ASTM D3236-88 can require a switch from curtain coating to roll coating, while phase separation from microcrystalline wax becomes observable as surface haze. Regulatory compliance for wax-coated paperboard in contact with aqueous and fatty foods is covered by 21 CFR 176.170 and 21 CFR 176.180; for non-food industrial wraps, REACH registration obligations apply to the EVA polymer and any migratory wax components. Drop melting point is controlled according to ASTM D3954-15, and congealing point according to ASTM D938-12. Terminal products in this sector include wax-coated corrugated shipping boxes, butcher-wrap food interleaving, and paper cup blanks where the EVA-modified wax acts as the external moisture barrier.
ELVAX 150 dissolves in toluene, methyl ethyl ketone, and ethyl acetate at solids loadings of 15–25 wt%, producing laminating adhesives for printed polyethylene terephthalate film to aluminium foil and low-density polyethylene sealant webs. The dissolved copolymer raises solution viscosity nonlinearly; at 20 wt% solids in a 70:30 toluene/MEK blend, rotational viscosity at 25 °C is controlled between 800 and 2,500 mPa·s for reverse-roll and gravure coating equipment. Coating is performed on a reverse-roll coater with a 30–60 µm wet film, followed by a drying tunnel with three zones at 50 °C, 65 °C, and 80 °C to maintain residual solvent below 5 mg/m² in the dried adhesive layer. Compliance testing for laminate bond strength follows ASTM D1876-08 T-peel adhesion, and residual solvent is assessed by static headspace gas chromatography under ASTM D4526-12. Food packaging lamination adhesives are subject to 21 CFR 175.105; European VOC emissions fall under Directive 2004/42/EC for coatings. Terminal products include retort lidding films, snack packaging laminates, and cold-seal release liners where the EVA layer is not in direct food contact. Aromatic hydrocarbon content above 10% of solvent mass is avoided because it increases retention and lowers elasticity after solvent evaporation.
When polymer-modified bitumen is processed at 170–185 °C in a high-shear mixer rotating at 3,000 rpm, ELVAX 150 is added at 2–6 wt% of the bitumen mass to raise softening point and low-temperature flexibility while limiting large-particle phase inversion that can occur above 7 wt%. The addition sequence matters: the EVA pellets are dispersed into the hot bitumen over 30–60 min under a rotor-stator head, and the resulting masterbatch is then diluted with further bitumen and stirred for 60–120 min at 150–180 °C to attain a homogeneous PMB. Softening point is tested under ASTM D36/D36M-14, penetration under ASTM D5/D5M-20, and elastic recovery under EN 13398; finished polymer-modified bitumen for waterproofing membranes is specified according to EN 14023:2010 and, for road applications, ASTM D5976-96 if export documentation requires ASTM-based PMB classification. Production-scale failures occur when EVA accumulates on the agitator hub at temperatures above 190 °C, causing gel particles in the finished membrane; therefore, nitrogen blanketing is used at storage tanks to reduce oxidative surface skinning. Terminal products include torch-applied waterproofing membranes, self-adhesive bituminous sheets, and hot-melt joint sealants for concrete pavement. At addition levels below 2 wt%, the softening-point increase is insufficient for membrane dimensional stability at 70 °C, while above 6 wt% the mix viscosity may exceed the wet-out limit of polyester carrier fabric in the membrane line.
In polyolefin coloration, ELVAX 150 serves as the carrier resin at 40–70 wt% of the masterbatch formulation, with organic or inorganic pigment at 30–50 wt% and a polymeric dispersant at 5–10 wt%. The 32% vinyl acetate content increases polar pigment wetting relative to low-density polyethylene carriers, reducing filter pressure rise in downstream blown-film extrusion. Compounding is performed on a co-rotating twin-screw extruder with L/D ratio 40:1 to 48:1, two high-shear kneading blocks before the atmospheric vent, barrel zones from 120 °C to 180 °C, and a water-ring strand pelletizer. Masterbatch quality is evaluated by pressure filter test and optical microscopy for agglomerates; regulatory compliance for the carrier resin includes REACH, RoHS 2011/65/EU, EN 71-3:2019 when destined for toy applications, and Regulation (EU) No 10/2011 or 21 CFR 177.1350 when used in indirect food-contact plastics. Terminal products include color concentrates for polyethylene film extrusion and injection molding at letdown ratios of 2–5%. Moisture above 0.10% in the carrier resin causes pigment agglomeration and requires pre-drying at 60 °C for 4 h before compounding.
| Application scenario | Key compliance standards |
|---|---|
| Hot-melt packaging adhesives | 21 CFR 175.105; 21 CFR 177.1350; ASTM D3236-88; ASTM D1876-08; ASTM E28-18 |
| Wax-modified barrier coatings | 21 CFR 176.170; 21 CFR 176.180; ASTM D3954-15; ASTM D938-12 |
| Solvent-borne laminate adhesives | 21 CFR 175.105; Directive 2004/42/EC; ASTM D1876-08; ASTM D4526-12 |
| Polymer-modified bitumen | EN 14023:2010; ASTM D5976-96; ASTM D5/D5M-20; ASTM D36/D36M-14; EN 13398 |
| Pigment masterbatch carrier | REACH; RoHS 2011/65/EU; EN 71-3:2019; Regulation (EU) No 10/2011; 21 CFR 177.1350 |
| Photovoltaic encapsulant film | IEC 61215-1:2021; IEC 61730-1:2016; UL 1703; ASTM D2765-16 |
ELVAX 150 can be formulated as a peroxide-crosslinked photovoltaic encapsulant film when the base resin is compounded with 0.5–1.2 phr of a bifunctional peroxide, 0.1–0.5 phr of a trialkoxysilane coupling agent, 0.1–0.3 phr of a hindered amine light stabilizer, and 0.1–0.3 phr of a phosphite antioxidant; the peroxide dosage must be adjusted to the lamination cure temperature because the 43 g/10 min melt index of ELVAX 150 shortens flow time and can cause cell edge bleed if the module is ramped to 150 °C before vacuum is fully drawn. Film is produced by cast extrusion at 180–200 °C through a slot die, embossed with a random matte texture to avoid blocking, and wound in thicknesses of 400–600 µm. Lamination uses a flat-plate vacuum laminator with a 12–18 min cycle: vacuum hold at 60–80 Pa for 5–8 min, followed by pressing at 0.6–1.0 bar and 145–165 °C. Cure state is measured by gel fraction above 80% using ASTM D2765-16. Compliance for photovoltaic modules is validated by IEC 61215-1:2021, IEC 61730-1:2016, and UL 1703 where module listing is required. Terminal products include monocrystalline and polycrystalline silicon module encapsulant films. Amine-based slip agents are excluded from the formulation because they prematurely quench peroxide-derived radicals. Published data for the specific use of ELVAX 150 in photovoltaic encapsulation is limited relative to dedicated solar EVA grades, so pilot trials with damp-heat and UV aging are required before qualification. Storage below 20 °C is required to prevent film blocking before lamination.
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ELVAX 150 is an ethylene vinyl acetate copolymer containing 32 wt% vinyl acetate comonomer and exhibiting a melt flow rate of 43 g/10 min at 190°C under 2.16 kg load, measured in accordance with ASTM D1238. The resin is supplied as pellets and is distinguished from lower-vinyl-acetate EVA grades by reduced polyethylene crystallinity, a peak crystalline melting point near 63°C by differential scanning calorimetry, and a density of 0.95 g/cm³ per ASTM D792. Published typical mechanical properties include tensile strength at break of 4.4 MPa and elongation at break of 940% under ASTM D638, with Shore A hardness of 65 per ASTM D2240. The high vinyl acetate content increases polarity and reduces crystallinity, producing a soft, rubbery solid-state response and broadening compatibility with polar tackifiers, rosin esters, and solvent systems. Typical uses include hot-melt adhesives, bookbinding and packaging adhesives, wax modification, polymer compounding, sealants, and solvent-borne adhesive formulations where low melt viscosity and adhesion to polar substrates are required. Product performance is formulation-dependent; changes in tackifier type, wax composition, filler content, and thermal history alter open time, set speed, peel strength, and viscosity.
| Property | Typical value | Test method |
|---|---|---|
| Vinyl acetate content | 32 wt% | Manufacturer method |
| Melt flow rate | 43 g/10 min | ASTM D1238, 190°C/2.16 kg |
| Density at 23°C | 0.95 g/cm³ | ASTM D792 |
| Tensile strength at break | 4.4 MPa | ASTM D638 |
| Elongation at break | 940% | ASTM D638 |
| Shore A hardness | 65 | ASTM D2240 |
| Peak melting point | 63°C | ASTM D3418 |
Vinyl acetate content controls the thermal and rheological window. Because the polymer melting point is near 63°C, low-temperature processing is feasible, but the practical hot-melt compounding range is 150–180°C to reduce viscosity and ensure rapid dissolution of tackifiers and waxes. At 190°C and 2.16 kg, the melt flow rate of 43 g/10 min produces a low-viscosity melt that can be pumped through heated lines, gear pumps, and slot-coating heads with lower pressure drop than EVA grades having melt flow rates below 10 g/10 min. Continuous compounding on a twin-screw extruder with an L/D ratio of 24:1 to 44:1 can be performed without intensive shear because the resin melts and disperses readily; screw configurations with excessive kneading blocks may generate unnecessary viscous heating. Production lines should monitor melt temperature rather than barrel setpoint alone because low melt viscosity can allow high screw speeds and generate localized temperature overshoot near the die. Residence times above 200°C should be limited to avoid acetic acid formation from deacetylation, which can corrode mild steel surfaces and generate odor in the finished adhesive.
Hot-melt adhesives formulated with ELVAX 150 are applied with slot-coater, roller, or nozzle systems at 160–180°C. Rotational viscometry under ASTM D3236 is used to control adhesive viscosity; the low melt viscosity of the base resin allows high tackifier and filler loading while maintaining pumpability. On high-speed packaging lines, char accumulation on heated tank walls is a recognized failure mode if the molten adhesive is held at high temperature for more than one shift; nitrogen blanketing or vacuum degassing reduces oxidation but does not eliminate the need for periodic cleanout.
The 32 wt% vinyl acetate content of ELVAX 150 maintains useful compatibility with rosin ester and terpene phenolic tackifiers and with some hydrogenated aromatic-modified hydrocarbon resins. Compatibility with high-crystallinity paraffin wax is limited because the polymer is more polar than lower-VA EVA; microcrystalline wax or Fischer-Tropsch wax is commonly selected to control open time and set speed without phase separation. In sigma-blade mixers operating at 160–180°C, the resin is melted first and tackifier is added incrementally to avoid thermal shock and localized gel formation. A hot-melt formulation may contain 25–35 wt% ELVAX 150, 35–50 wt% tackifier, and 15–30 wt% wax, with antioxidant at 0.2–1.0 wt%; adhesion and viscosity depend on the softening point and polarity of the tackifier. When rosin ester tackifier is replaced by fully hydrogenated hydrocarbon resin, adhesion to polyethylene may be reduced, while low-temperature flexibility improves. The high melt index of 43 g/10 min lowers finished adhesive viscosity, but cohesive strength at elevated temperature is lower than that of lower-MFR EVA grades.
ELVAX 150 is selected over lower-vinyl-acetate EVA grades when lower crystallinity, lower modulus, and better polar adhesion are required. A grade with 18 wt% vinyl acetate typically retains a crystalline melting point near 80–85°C and has higher tensile modulus and heat resistance, while ELVAX 150 at 32 wt% vinyl acetate melts near 63°C and exhibits elongation at break near 940%. Compared with a lower-melt-index high-VA grade, the 43 g/10 min MFR of ELVAX 150 reduces melt viscosity and lowers the minimum application temperature, but it also reduces melt strength and cohesive strength. Therefore, ELVAX 150 is rarely used as a structural extruded profile or foam resin; those applications favor lower-MFR EVA or polyolefin elastomers with higher molecular weight. Compared with metallocene polyolefin elastomers, ELVAX 150 exhibits wider compatibility with rosin ester and terpene phenolic tackifiers, higher polarity, and faster set speed in hot-melt adhesive systems, but lower thermal oxidative stability and higher density. The resin also differs from ethylene vinyl acetate copolymers with 28 wt% vinyl acetate; the additional vinyl acetate increases solubility in ketone and ester solvents, reduces equilibrium stiffness, and shifts adhesion toward polar cellulosic and metal substrates.
In solvent-borne adhesive manufacturing, ELVAX 150 is dissolved in toluene, xylene, or ketone-ester blends at solids contents influenced by the high vinyl acetate content. High-VA grades dissolve more readily than lower-VA grades and produce lower solution viscosity at equivalent solids because of reduced crystallinity. For wax modification, addition of 5–15 wt% ELVAX 150 to paraffin ware blends increases flexibility, toughness, and adhesion to board; the high melt index allows homogeneous dispersion without severe viscosity rise. In asphalt modification, EVA addition improves high-temperature rutting resistance and low-temperature cracking resistance, but high melt index resins may be blended with lower-MFR EVA to balance storage stability and mixing torque; published data for asphalt-specific configurations is limited.
Thermal stability is governed by the onset of deacetylation. Above 200°C, especially with residence times beyond 2–4 h, EVA can release acetic acid, which corrodes mild steel and aluminum equipment; stainless steel or nickel-plated vessels are preferred. Copper and copper alloys are particularly undesirable because metal-ion catalysis can accelerate degradation. Amine-based additives and some amine-functional adhesion promoters may promote deacetylation and should be avoided or evaluated by accelerated aging. Pre-drying of the virgin resin is generally unnecessary if packaging remains intact, but hygroscopic tackifiers, fillers, and recycled feedstocks should be dried below 0.1 wt% moisture before compounding to avoid hydrolysis and viscosity drift. If storage occurs at relative humidity above 60% in non-hermetic packaging, a pre-drying step at 55–60°C for 4–6 h may be applied to remove surface moisture; published data for this specific storage configuration is limited.
| Regulation or standard | Applicability and condition |
|---|---|
| FDA 21 CFR 177.1350 | Ethylene-vinyl acetate copolymers for use in food contact, subject to end-use migration testing and compositional limits |
| EU Regulation (EU) No 10/2011 | May be used in food-contact plastics within overall migration and specific migration limits; compliance must be established for the finished article |
| REACH | Polymer status depends on monomer imports and registration obligations; no intentional restricted substances above threshold |
| RoHS | Finished assembly assessment required; EVA resin alone is not typically a source of restricted heavy metals |
For packaging hot-melt adhesive manufacturing, the critical process controls are melt temperature, tackifier moisture, and recirculation time. A recirculating hot-melt unit with a gear pump and in-line filtration is usually set at 160–180°C; filters of 100–200 µm are used to remove char and gel. The low melt viscosity of ELVAX 150 supports high-speed slot-coating at line speeds above 30 m/min but increases the risk of nozzle drool if the manifold temperature varies by more than ±5°C. Calibration of thermocouples and heater bands on production units is therefore part of routine process control. End-use adhesion is evaluated by peel testing under ASTM D1876 or shear adhesion failure temperature measurement; the chosen standard depends on the substrate and adhesive joint configuration.
