| HS Code | 960199 |
| Density | 0.94 g/cm³ |
| Melt Index 190 C 2 16kg | 0.70 g/10min |
| Vinyl Acetate Content | 18% |
| Melting Point Dsc | 83°C |
| Freeze Point Dsc | 55°C |
| Vicat Softening Point | 63°C |
| Tensile Strength At Break | 20 MPa |
| Elongation At Break | 820% |
| Flexural Modulus | 28 MPa |
| Hardness Shore D | 43 |
As an accredited ELVAX 3165 Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ELVAX 3165 Ethylene Vinyl Acetate Copolymer is supplied as free-flowing pellets in 25 kg multiwall paper bags. |
| Container Loading (20′ FCL) | Load ELVAX 3165 EVA copolymer into 20′ FCL on pallets, secured tightly, moisture-protected, clean, contamination-free, ensuring safe transport. |
| Shipping | ELVAX 3165 is shipped as solid pellets in multi-walled paper bags or bulk containers. Non-hazardous, but keep dry and store below 50°C to prevent clumping. Avoid direct sunlight, humidity, and excessive compression during transport. Standard dry van or container is suitable; ensure adequate ventilation and secure palletization. |
| Storage | Store ELVAX 3165 Ethylene Vinyl Acetate Copolymer in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep containers tightly closed when not in use to prevent moisture and contamination. Avoid contact with strong oxidizers. Under proper storage conditions, shelf life is generally two years from date of manufacture. |
| Shelf Life | Shelf life is typically 2 years when stored in original, unopened packaging under dry, cool conditions. |
Edge-banding hot melts formulated with ELVAX 3165, an 18 wt% vinyl acetate copolymer with 0.7 g/10 min melt index determined under ASTM D1238-20 at 190°C/2.16 kg, are compounded into ternary systems containing 25–40 wt% ELVAX 3165, 30–45 wt% hydrogenated C9 tackifying resin, 10–20 wt% microcrystalline wax, and 0.2–0.5 wt% hindered phenolic antioxidant. The low melt index raises low-shear viscosity and limits substrate penetration into sanded wood edges, while the vinyl acetate comonomer increases T-peel resistance on PVC and ABS edge bands measured under ASTM D1876-08. Slot-die application is run at 180–195°C, with production-scale gear-pump discharge pressure held between 4 MPa and 10 MPa depending on nozzle slot width and melt temperature. Brookfield viscosity measured under ASTM D3236-21 at 180°C remains within slot-die limits when the EVA fraction is held below 40 wt%. In a jacketed sigma-blade mixer operating at 160–175°C, residence time beyond 3 h causes a measurable acid-number rise under ASTM D1386-15 and darkening, a failure mode traced to acetic acid elimination that accelerates above 200°C. Formulations intended for food-packaging adhesive contact are specified under FDA 21 CFR 175.105, while REACH Regulation (EC) No 1907/2006 Annex XVII applies to EU import. Terminal part types include pre-coated edge-banding coils, profile wrapping foils, and PVC-foil cabinet door edge seals.
| Constituent | Range (wt%) | Processing boundary |
|---|---|---|
| ELVAX 3165 | 25–40 | Below 25 wt% peel adhesion drops; above 40 wt% coating viscosity exceeds slot-die limit |
| Hydrogenated C9 tackifying resin | 30–45 | Below 30 wt% wetting on PVC is insufficient; above 45 wt% open time reduces to less than production placement window |
| Microcrystalline wax | 10–20 | Above 20 wt% low-temperature flexibility loss occurs; below 10 wt% set time exceeds line speed |
| Hindered phenolic antioxidant | 0.2–0.5 | Below 0.2 wt% viscosity drift appears after 2 h at 180°C |
In torch-applied roofing sheet production, polymer-modified bitumen compounds incorporate ELVAX 3165 at 3–6 wt% for road-grade binders and 5–12 wt% for membrane formulations, calculated against base bitumen mass. Dispersion is executed in a heated rotor-stator high-shear mill at 170–180°C for 45–120 min, with peripheral tip speed above 20 m/s; lower shear leaves EVA domains exceeding 100 μm, observed as surface grain in calendered sheets. Softening point increase under ASTM D36-14 is typically 12–25°C at the higher addition range, while penetration at 25°C under ASTM D5-13 remains stable only when EVA is pre-dispersed before SBS addition. Compliance reference points are EN 14023:2010 for modified bitumen road binders, ASTM D6084-21 for high-temperature viscosity, and EN 13707:2004 for flexible roofing sheets. Terminal products are torch-applied waterproofing membranes, bridge deck sheeting, and crack-bridging repair tapes. The boundary condition is holding at 190°C; after 4 h, oxidized skin forms on the reactor wall and can shed into the finished compound, producing visible defects in the membrane surface.
Halogen-free cable jacketing compounds based on linear low-density polyethylene and precipitated magnesium dihydroxide or aluminium trihydroxide at total filler loadings of 150–180 phr are modified with ELVAX 3165 at 20–40 phr relative to the polyolefin matrix. The comonomer acts as a viscosity-sharing co-resin that improves filler dispersion and raises tensile elongation measured under ISO 527-2:2012. Compounding on a corotating twin-screw extruder with L/D 40:1 requires a barrel profile from 140°C to 170°C; the melt film must not exceed 190°C because the 18 wt% vinyl acetate group releases acetic acid at elevated temperature, causing pH drop in downstream cooling water and surface roughness on the jacket. Pre-drying is required at 70°C for 4 h when storage humidity exceeds 60% RH. Production-scale lines with gravimetric dosing exhibit batch variance in filler dispersion when feed throat moisture is not controlled, visible as pinholes after 0.5 h of line speed above 100 m/min. Regulatory compliance is demonstrated through IEC 60332-1-2, IEC 60754-1, and IEC 61034-2. Terminal products are building riser cable jackets, industrial control cable sheaths, and shipboard low-smoke cable jackets.
| Standard | Measurement scope |
|---|---|
| IEC 60332-1-2 | Vertical flame propagation for single insulated conductor or cable |
| IEC 60754-1 | Halogen acid gas evolution from combustion |
| IEC 61034-2 | Smoke density light transmittance during cable burning |
| ISO 527-2:2012 | Tensile elongation at break and tensile stress |
When ELVAX 3165 is used as a carrier resin in polyolefin color concentrates, the masterbatch addition ratio is 40–70 wt% ELVAX 3165, 20–50 wt% oven-dried pigment, and 5–15 wt% internal dispersant. Compounding is run on a corotating twin-screw extruder with L/D 32:1–40:1 and a barrel temperature profile from 120°C to 160°C; vacuum devolatilization at -0.08 MPa removes moisture and low-molecular-weight volatiles ahead of strand pelletizing. Because the 0.7 g/10 min melt index is lower than typical carrier grades, the formulation is limited to lines that require high melt tenacity to prevent strand breakage. In final LDPE and LLDPE film conversion, the concentrate is let down at 1–5 wt%; below 1 wt% let-down, a higher-melt-index carrier should be specified to avoid uneven pigment distribution. Food-contact status is governed by 21 CFR 177.1350, with REACH (EC) No 1907/2006 and RoHS Directive 2011/65/EU Annex II applicable to EU finished goods. Terminal products include pigmented LLDPE stretch film, coloured carrier bags, injection-molded caps, and blow-molded bottles. The carrier is incompatible with PET and polycarbonate melt streams; processing above 260°C with these resins produces phase separation and surface haze.
Closed-cell foams for footbed and sports mat production use ELVAX 3165 at 30–60 wt% in the polymer phase, blended with a higher-VA EVA grade when Shore C hardness below 35 is required under ASTM D2240-15. The expansion system consists of dicumyl peroxide at 0.6–1.0 phr, azodicarbonamide at 2.5–5.0 phr, zinc oxide at 0.5–1.0 phr as a decomposition activator, and calcium carbonate at 5–15 phr as a nucleator and shrinkage control agent. Mixing proceeds in an internal mixer at 100–110°C, followed by two-roll mill homogenisation and sheet preforming. Compression molding takes place at 160–175°C and 10–15 MPa; the processing conflict is the overlap between blowing agent decomposition and peroxide cure. If expansion occurs before sufficient crosslink density develops, gas escapes through surface defects and density distribution widens beyond ±5%. Zinc oxide loading below 0.5 phr leaves undecomposed azodicarbonamide residue, visible as yellow particles in thin sections. Finished foam is tested under ISO 1798:2008 for tensile properties and ISO 1856:2018 for compression set, with REACH (EC) No 1907/2006 Annex XVII and RoHS Directive 2011/65/EU compliance required for consumer goods. Terminal products include athletic shoe midsoles, insoles, anti-fatigue floor mats, and exercise mat sheets. Residual azodicarbonamide levels must be verified against relevant food-contact assumptions when the foam is used in kitchen matting; published data for this specific ELVAX 3165 footprint is limited.
For water-resistant corrugated bulk containers, paraffin wax blends are modified with ELVAX 3165 at 1–5 wt% using a pre-dispersed concentrate prepared at 120–140°C in a jacketed turbine mixer. The saturant is applied at 100–120°C through immersion or cascade coating units; the 18 wt% vinyl acetate comonomer shifts the wax from brittle fracture to ductile deformation at low temperatures, reducing cracking on folded corrugated flutes. Addition above 5 wt% raises viscosity beyond the saturation line limit, causing uneven pick-up and plugged return trough flow. Regulatory references are 21 CFR 176.170 for coated paperboard in contact with aqueous and fatty foods, ASTM D3954-15 for wax drop melting point, and REACH (EC) No 1907/2006. Terminal product types include waxed produce boxes, poultry and seafood cartons, and corrugated bulk bins. The application requires no separate pre-drying only when pellet storage is held below 60% RH; otherwise, surface moisture generates steam during wax mixing and produces pinholes in the saturant film.
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ELVAX 3165 is an ethylene-vinyl acetate copolymer supplied as a high-molecular-weight pelletized resin with a nominal vinyl acetate comonomer content of 18 wt% and a melt mass-flow rate of 0.7 g/10 min determined at 190 °C under 2.16 kg load in accordance with ASTM D1238-20 and ISO 1133-1:2022. The solid-state density is 0.94 g/cm³ when measured by ASTM D792-20. Differential scanning calorimetry by ASTM D3418-15 gives a peak melting temperature of 73 °C, while the Vicat softening temperature is 63 °C under Method A50 of ASTM D1525-17 or ISO 306:2022. The low melt index, compared with many EVA film grades, elevates melt viscosity, melt tension, and resistance to parison sag during extrusion. Because the acetate comonomer interrupts crystalline order along the ethylene backbone, modulus is lower and optical clarity is higher than that of ethylene homopolymers of equivalent molecular weight. The grade is supplied in pellet form and contains an antioxidant package; the exact additive composition and release limits appear on the certificate of analysis for each lot. These values are typical properties, not specifications, and lot-to-lot variation is controlled within the producer’s release limits.
| Property | Typical Value | Test Method |
|---|---|---|
| Vinyl acetate content | 18 wt% | ASTM D5594-18 |
| Melt flow rate | 0.7 g/10 min | ASTM D1238-20, 190 °C/2.16 kg |
| Density | 0.94 g/cm³ | ASTM D792-20 |
| Peak melting temperature | 73 °C | ASTM D3418-15 |
| Vicat softening temperature | 63 °C | ASTM D1525-17, Method A50 |
On production-scale single-screw extruders with L/D 24:1 to 30:1 and barrier screws, ELVAX 3165 is processed at barrel set temperatures from 160 °C to 210 °C. The feed throat is held below 45 °C to prevent pellet blocking. Screw speed is frequently torque-limited rather than temperature-limited because the high melt viscosity increases energy dissipation in the metering section. Melt temperature measured by an immersion probe at the die entry should be maintained below 230 °C to avoid acetic acid release from ester thermolysis. In tubular film operations, high melt strength supports stable bubble geometry at blow-up ratios between 2.0:1 and 3.0:1; frost-line height is typically raised by 10% to 15% relative to lower-molecular-weight EVA film grades to compensate for higher extensional viscosity. Cast film and extrusion coating are not preferred conversion routes for this grade because the low melt index increases backpressure and limits thin-gauge drawdown compared with EVA copolymers having melt flow rates above 2 g/10 min. Barrel pressure at the breaker plate should be recorded and trended against baseline; rising pressure with unchanged barrel settings indicates solids-bed blockage or feed-plugging. In profile extrusion of tubing and weatherstrip, the resin’s high melt strength resists draw-down and maintains dimensional control in cooling tanks operated at 10 °C to 20 °C.
ELVAX 3165 is formulated into hot-melt and solvent-borne adhesive systems where cohesive strength at 40 °C to 60 °C service temperatures is required. In jacketed sigma-blade mixers of 200 L to 1,000 L working capacity, the resin is combined with rosin ester tackifiers and microcrystalline wax after the low-molecular-weight components have melted at 150 °C to 180 °C; the low melt index increases blend viscosity, which can improve static shear resistance but requires higher-torque agitation and longer complete dissolution times. Polymer modification of polyethylene and polypropylene compounds is conducted with 5 wt% to 15 wt% of ELVAX 3165 in twin-screw extruders with L/D 40:1 and side feeding to enhance environmental stress-crack resistance and filler wetting. Adhesive performance should be evaluated by ASTM D1002-10 lap shear or ASTM D1876-08 T-peel on the finished formulation; published data for adhesion of this specific grade to polyamide and polycarbonate is limited, so interfacial performance should not be inferred from vinyl acetate content alone. In foil laminating, process capability is governed by the selected peel test and by the oxidation state of the foil surface.
Compared with EVA copolymers containing 9 wt% or 12 wt% vinyl acetate, ELVAX 3165 contains a higher concentration of polar acetate carbonyl groups, which reduces crystallinity and improves wetting of glass, aluminum, and epoxide-primed steel. Water vapor transmission rate, measured by ASTM F1249-20, increases with vinyl acetate content, and low-temperature flexibility follows the same trend; ELVAX 3165 therefore occupies an intermediate position between low-VA stiffness and high-VA tack. Compared with 28 wt% and 33 wt% vinyl acetate copolymers, ELVAX 3165 exhibits a higher Vicat softening temperature and lower blocking at 40 °C, reducing storage problems but also limiting adhesion to untreated polyester film. Within the same 18 wt% vinyl acetate family, the 0.7 g/10 min melt flow rate differentiates ELVAX 3165 from lower-viscosity grades: it produces higher melt strength and better thick-section integrity, while requiring more torque and longer injection molding fill times. Adhesive and sealant comparisons should be made only under identical surface preparation and test speed, preferably using ASTM D1002-10 lap shear or ASTM D1876-08 T-peel, because surface roughness and contamination can dominate the measured values.
For food-contact uses, ELVAX 3165 may be evaluated under 21 CFR 177.1350 or EU Regulation 10/2011, but compliance is not an inherent property of the resin; it depends on the final formulation, processing history, and overall migration limits. Electrical and electronic applications should be screened against Directive 2011/65/EU for restricted substances in the finished article, although the base resin is not intentionally formulated with lead, cadmium, mercury, chromium(VI), PBB, or PBDE above the directive’s concentration thresholds. For food-contact and medical packaging, lot-specific documentation should be obtained from the resin supplier because additive packages and monomer residuals may vary.
The acetate ester group undergoes hydrolysis under acidic or strong alkaline conditions, particularly above 80 °C in moist environments. Continuous immersion in concentrated sodium hydroxide or hydrochloric acid is not recommended; ester cleavage releases acetic acid and reduces molecular weight, causing embrittlement and surface tack. Ketone, chlorinated, and aromatic solvents swell the resin; toluene and methyl ethyl ketone are not suitable for long-term contact. Alcohols and aliphatic hydrocarbons show limited interaction at room temperature, but compatibility must be confirmed by volume swell testing under ISO 175:2022 or ASTM D543-21. Ultraviolet exposure degrades EVA by chain scission and yellowing unless 0.1 wt% to 0.5 wt% of UV stabilizers are included; outdoor applications require carbon black or hindered amine light stabilizers at loadings validated by accelerated weathering under ASTM G154-16. When pre-drying is necessary because storage has exceeded 24 h at relative humidity above 60%, a dehumidifying hopper dryer with a dew point below -30 °C and an air temperature of 60 °C to 70 °C for 4 h to 6 h is used to reduce moisture to below 0.05 wt%. Addition of amine-based additives should be evaluated because amines can catalyze ester hydrolysis and promote discoloration.
ELVAX 3165 can be incorporated into peroxide-cured EVA compounds for low- and medium-voltage wire insulation when the formulation contains a peroxide such as dicumyl peroxide at 0.5 wt% to 2.0 wt%. Crosslinking is performed on catenary or continuous vulcanization lines with molten salt, pressurized nitrogen, or steam curing zones; the cure temperature is typically maintained between 180 °C and 220 °C. The low melt index of the base resin increases compound viscosity, which can reduce conductor penetration and improve concentricity in thick-wall constructions but raises extrusion head pressure. Cure characterization should follow ASTM D5289-19a moving-die rheometry to determine scorch time and torque maximum. Published cure kinetic datasets for this exact grade are limited; therefore, peroxide loading and coagent level must be optimized by rheometer testing rather than assumed from higher-VA or lower-molecular-weight EVA data. The presence of antioxidant in the base resin can interfere with peroxide efficiency, so scorch and cure-state curves should be generated for each production lot.
On hydraulic injection molding machines with clamp force from 500 kN to 5,000 kN, ELVAX 3165 is molded at barrel temperatures of 160 °C to 210 °C and mold temperatures of 20 °C to 40 °C. Because of its high melt viscosity, the grade requires higher injection pressure and a lower screw back pressure than polyolefins of similar density. Injection speed is set to maintain a shear rate within the stable region of the resin’s viscosity curve; excessive shear heating above 230 °C causes acetic acid release and surface marks. Runners should be full round or trapezoidal with diameters at least 4 mm to 6 mm in multi-cavity tools to prevent premature freeze-off. Packing pressure is held until gate freeze, and cushion is maintained above 5 mm to avoid sending partially molten material into the cavity. Short-shot trials and mold-filling simulation should be used to establish the exact pressure window, because published process data for this specific grade in complex tools is limited.
