| HS Code | 566681 |
| Vinyl Acetate Content | 18 % |
| Melt Flow Rate | 6.0 g/10 min (190°C/2.16 kg) |
| Density | 0.94 g/cm³ |
| Melting Point | 89 °C |
| Vicat Softening Point | 63 °C |
| Tensile Strength At Break | 21 MPa |
| Elongation At Break | 650 % |
| Flexural Modulus | 70 MPa |
| Hardness Shore D | 45 |
| Brittleness Temperature | -76 °C |
As an accredited ELVAX 3165LG Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ELVAX 3165LG is supplied as ethylene vinyl acetate copolymer pellets in 25 kg polyethylene bags, packaged for industrial processing. |
| Container Loading (20′ FCL) | ELVAX 3165LG loaded in 20' FCL, packed in 25kg bags on shrink-wrapped pallets, ensuring safe transport. |
| Shipping | ELVAX 3165LG is shipped as solid pellets in moisture-resistant bags or drums. Store in a cool, dry area away from heat, sparks, and oxidizers. Handle with care to avoid dust generation. No hazardous classification under standard transport regulations; non-DG for air, sea, and ground. Ensure clean, covered transport. |
| Storage | Store ELVAX 3165LG in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep containers tightly closed to prevent contamination and moisture pickup. Avoid contact with strong oxidizers. Maintain ambient temperatures and follow manufacturer’s shelf-life recommendations. Proper storage preserves polymer quality and processing performance. |
| Shelf Life | Shelf life is typically two years from shipment when stored in a cool, dry place away from direct sunlight. |
In hot-melt packaging adhesive production, ELVAX 3165LG is compounded with hydrogenated hydrocarbon tackifiers and Fischer-Tropsch waxes at polymer loadings of 25 wt%–35 wt% of total formulation. The resin contributes a vinyl acetate content of 18 wt% (ASTM D5594) and a melt index of 0.7 dg/min (ASTM D1238-20, 190 °C/2.16 kg), which positions blend viscosity within a packaging-grade window of 1,500–3,500 mPa·s at 180 °C (ASTM D3236). Industry compliance for food-contact case and carton sealing falls under FDA 21 CFR 175.105 for indirect food adhesives, with EU market entries requiring REACH Regulation (EC) No 1907/2006 registration and RoHS Directive 2011/65/EU compliance for heavy metals. Production lines typically mix the EVA, tackifier, and wax in a jacketed sigma-blade mixer or a co-rotating twin-screw extruder with an L/D of 40:1–48:1; zone temperatures are held between 150 °C and 180 °C, and the melt is filtered through 100–150 µm mesh to remove char particles. Application equipment—most often gear-pump hot-melt units with slot dies—operates at 170 °C–180 °C, and the adhesive is applied to kraft or coated board substrates at 0.5–1.5 mil coat weight before compression bonding. Terminal product types include hot-melt carton and tray sealing adhesives, bookbinding spine adhesives, and deep-freeze case adhesives. The 0.7 dg/min melt index prevents excessive penetration into porous board but requires pre-melt tank residence time below 4 h at 180 °C to avoid thermal gel formation. Amine-functional adhesion promoters should not exceed 0.1 wt% because they catalyze ester cleavage and increase melt acidity. Char accumulation in pre-melt tanks and plugging of 100 µm screens occurs after 4 h at 180 °C when oxygen exclusion is insufficient.
| ELVAX 3165LG content (wt%) | Tackifier content (wt%) | Wax content (wt%) | Viscosity at 180 °C (mPa·s, ASTM D3236) | Application window |
|---|---|---|---|---|
| 20 | 50 | 30 | 800–1,200 | Low-viscosity carton sealing |
| 30 | 45 | 25 | 1,800–2,800 | Case and tray sealing |
| 40 | 40 | 20 | 3,500–5,500 | High-viscosity deep-freeze carton bonding |
A masterbatch carrier resin based on ELVAX 3165LG functions most predictably at addition levels of 30 wt%–65 wt% of the carrier phase, with 35 wt%–70 wt% carbon black, organic pigment, or mineral additive. The high molecular weight associated with the 0.7 dg/min melt index (ASTM D1238-20) imposes shear stress in co-rotating twin-screw extruders with L/D ratios of 44:1–52:1, where dispersive mixing improves when specific energy input exceeds 0.18 kWh/kg. Compliance for polyolefin converters is covered by REACH Regulation (EC) No 1907/2006 and RoHS Directive 2011/65/EU, with food-contact masterbatches requiring verification against FDA 21 CFR 176.170(c) depending on the final film or molded article. Processing zones are set from 150 °C in the feed throat to 190 °C at the die; temperatures above 210 °C cause measurable gel formation and acetic acid release in nitrogen-purged vents, so extruder vent vacuum must remain below 80 kPa absolute. Underwater pelletizing at 130 °C–150 °C water temperature yields uniform cylindrical pellets for downstream dosing into LDPE film lines. Terminal product types include carbon black masterbatches for agricultural film, additive concentrates for extrusion coating, and flame-retardant mineral concentrates for polyolefin sheet. Batch-to-batch viscosity variation of ±5% appears when pigment moisture content exceeds 0.1 wt%, which requires pre-drying at 80 °C for 1 h before feeding.
Across solvent-borne laminating adhesive lines running toluene/MEK diluent blends at 20 wt%–30 wt% dry solids, ELVAX 3165LG is incorporated at 20 wt%–35 wt% of total solids to obtain a low gel fraction that prevents coater defects in gravure cylinders below 150 L/cm. The vinyl acetate content of 18 wt% (ASTM D5594) reduces crystallinity enough for dissolution in aromatic/ketone solvent systems but not enough to provide true solubility in aliphatic hydrocarbon diluents; formulators therefore limit aliphatic content to 10 wt% of total solvent. Food-contact compliance for dried laminates follows FDA 21 CFR 175.105 for adhesives, and where the EVA layer becomes a functional coating, FDA 21 CFR 177.1350 may apply depending on the extraction conditions in the specific end-use. Production equipment typically consists of high-dissolver vessels at 70 °C–80 °C, followed by 150–300 µm filtration and gravure or reverse-roll coating onto polyester or aluminum foil at 30–60 m/min; drying tunnels are staged from 60 °C to 90 °C to remove residual solvent below 5 mg/m². Terminal product types include retortable film-to-foil laminates, pharmaceutical blister lidding adhesives, and cold-seal release base coats. A process limit arises when solution viscosity increases above 1,500 mPa·s at 25 °C (ASTM D2196) because gravure cell depletion reduces coating uniformity; moisture uptake during dissolver loading above 60% RH must be controlled by pre-drying the resin at 60 °C for 2 h. Published comparative peel-strength data for this specific EVA grade in retortable foil laminates is limited, so converter qualification relies on ASTM F904 bond strength evaluations.
When bitumen modification requires suppression of low-temperature cracking without the capital cost of SBS, ELVAX 3165LG is introduced into penetration-grade bitumen at 2 wt%–4 wt% of the bitumen mass, with 4 wt% constituting the upper storage-stability boundary unless a wax compatibilizer or maleic anhydride-grafted polyethylene is present. The 18 wt% vinyl acetate content (ASTM D5594) and 0.7 dg/min melt index (ASTM D1238-20) produce a polymer-rich network after high-shear mixing at 170 °C–185 °C for 60–90 min in an inline rotor-stator mill operating at 3,000–6,000 rpm. Compliance for European polymer-modified bitumen is framed by EN 14023, with performance testing under ASTM D6084 for elastic recovery, ASTM D36 for softening point, and ASTM D4402 for rotational viscosity. The downstream process begins with bitumen preheated to 160 °C–170 °C, milled at 170 °C–185 °C, then transferred with constant agitation to storage tanks at 160 °C–170 °C; storage stability testing according to EN 13399 measures a softening point difference of less than 2.5 °C between top and bottom samples for compositions below 4 wt% polymer. Terminal product types include heavy-duty road surfacing binders, bridge deck waterproofing membranes, and airfield mastic materials. Above 4 wt%, gravitational phase separation of the low-density EVA phase occurs within 48 h unless a reactive compatibilizer is used, and bitumen oxidation during milling above 185 °C causes viscosity drift that violates ASTM D4402 specification windows. Horizontal storage tanks with recirculation pumps and 175 °C maximum jacket temperature reduce the separation risk in batch operations.
For halogen-free wire and cable insulation compounds, the compounding constraints of filler loading and conductor adhesion are addressed by using ELVAX 3165LG at 20 phr–40 phr with 80 phr–120 phr aluminum trihydroxide and 5 phr–15 phr magnesium dihydroxide. The 0.7 dg/min melt index (ASTM D1238-20) retains enough high-shear fluidity in a 46:1 L/D twin-screw extruder at 145 °C–170 °C. Compliance is structured around IEC 60502-1 for low-voltage cable insulation, EN 50267-2-1 for halogen gas release testing, and RoHS Directive 2011/65/EU for lead, cadmium, mercury, and chromium. Downstream production uses a Buss co-kneader or co-rotating twin-screw extruder for filler dispersion, followed by a 100–200 µm screen pack and a crosshead wire-coating die at 130 °C–160 °C; peroxide crosslinking is introduced at 1.0 phr–1.5 phr dicumyl peroxide only when the specific cable construction requires thermoset performance. Terminal product types include sheathing compounds for low-voltage control cables, heat-shrinkable tubing bases, and bedding compounds for armored cables. Acid scavenger addition is required because the vinyl acetate segment releases acetic acid during combustion and during extended high-shear processing above 180 °C; zinc stearate loadings above 1.0 phr catalyze ester hydrolysis and must be avoided. Batch-to-batch variation in aluminum trihydroxide moisture content above 0.2 wt% produces surface porosity in extrusion, requiring dryer hoppers at 80 °C for 1 h before compounding.
Carpet tile backing operations that rely on continuous tenter frames compound ELVAX 3165LG at 15 wt%–30 wt% of the backing compound to reduce edge curl and improve tuft bind. The production process involves twin-screw extrusion compounding at 150 °C–180 °C, followed by calendering or slot-die application onto primary backing fabric at 180 °C–200 °C; the low melt index of 0.7 dg/min (ASTM D1238-20) limits excessive strike-through into carpet pile but requires die lip temperatures to remain above 175 °C to prevent melt fracture. Compliance for commercial carpet systems falls under REACH Regulation (EC) No 1907/2006 and the EU Construction Products Regulation for CE marking, with tuft bind tested in accordance with ISO 4919 for carpet tuft withdrawal force. Terminal product types include carpet tile secondary backing, broadloom pre-coat adhesives, and dimensionally stable entrance mat backing layers. Process limits include a viscosity rise beyond 8,000 mPa·s at 180 °C (ASTM D3236) when calcium carbonate filler loadings exceed 60 wt%; this rise requires reduced line speed and increases back pressure on gear pumps above 12 MPa. Filler aggregates larger than 45 µm in the final compound cause die streaks, so the letdown step must include a 100–150 µm melt filtration stage and a vacuum vent at −80 kPa to remove absorbed water and residual volatiles.
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ELVAX 3165LG is supplied as a low-gel ethylene-vinyl acetate copolymer pellet intended for coextruded sealant films, extrusion coating, hot-melt adhesives, wax modification, and polymer compounding. The grade combines a nominal vinyl acetate comonomer content of 18 wt% with 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 or ISO 1133-1:2022. This compositional and rheological position places 3165LG at the low-melt-flow end of the mid-VA EVA range, where the acetate comonomer suppresses polyethylene crystallinity while the high molar mass maintains melt tension, neck-in control, and bubble stability in high-draw processes. The LG designation reflects a low-gel manufacturing route intended for thin films and high-clarity sealant webs in which visible gel defects, fisheyes, and pinholes are critical. The following nominal property profile is based on current manufacturer documentation; lot-specific certificates may shift within normal production tolerance.
| Property | Nominal value | Test method |
|---|---|---|
| Vinyl acetate comonomer content | 18 wt% | Manufacturer internal FTIR or TGA method |
| Melt mass-flow rate | 0.7 g/10 min | ASTM D1238-20 at 190 °C/2.16 kg; ISO 1133-1:2022 |
| Density | 0.940 g/cm³ | ASTM D792-20; ISO 1183-1:2019 |
| DSC melting temperature | typical range 83–88 °C | ASTM D3418-21; ISO 11357-3:2018 |
| Vicat softening temperature | near 64 °C under 10 N, 50 °C/h | ASTM D1525-17; ISO 306:2022 |
Low-gel production is most relevant when the copolymer is drawn below 40 µm in extrusion coating or cast film. Gel particles above the visible-defect threshold interrupt seal integrity, increase scrap, and force line-stop events. In 3165LG, the low-gel specification is implemented through reactor and finishing controls rather than post-extrusion filtration alone, so the pellet feed can be used directly in clean film processes where screen-pack changes must remain infrequent.
A vinyl acetate level of 18 wt% reduces crystalline order relative to low-VA ethylene copolymers while retaining a useful balance of stiffness, toughness, and thermal processability. Lower-VA grades in the 7.5–12 wt% range exhibit higher crystallinity, higher seal-initiation temperature, lower permeability to nonpolar penetrants, and reduced adhesion to polar substrates. Higher-VA grades in the 25–40 wt% range exhibit lower modulus, greater tack, improved compatibility with polar tackifiers, and lower thermal degradation thresholds. The 3165LG grade thereby occupies a midrange where seal performance, polar adhesion, melt integrity, and cost are balanced for flexible packaging structures.
Within the same 18 wt% VA class, melt-flow positioning changes processing behaviour even when comonomer content is identical. A higher-melt-flow 18 wt% EVA enters low-viscosity adhesive melts more readily and may be preferred in injection-moulded closures or low-pressure potting compounds. In contrast, the 0.7 g/10 min melt mass-flow rate of 3165LG provides higher melt strength, lower draw resonance, and better bubble stability in blown-film and high-speed extrusion coating. The trade-off is higher extruder torque, higher head pressure, and the need for more shear heating management on long extruders.
| Resin class | Typical comonomer content | Melt-flow position | Processing and end-use consequence |
|---|---|---|---|
| ELVAX 3165LG | 18 wt% | Low MFR | High melt strength, low gel, reduced neck-in in extrusion coating, higher torque demand |
| Lower-VA EVA | 7.5–12 wt% | Varies | Higher crystallinity, higher seal-initiation temperature, lower polar adhesion, lower permeability |
| Higher-VA EVA | 25–40 wt% | Varies | Lower modulus, higher tack, better polar-substrate wetting, lower thermal stability ceiling |
| High-flow 18 wt% EVA | 18 wt% | High MFR | Lower melt viscosity, easier adhesive mixing, reduced film bubble stability and neck-in control |
Published capillary rheometry data for low-MFR EVA resins of this composition class show pronounced shear thinning from 100 s⁻¹ to 1000 s⁻¹. The practical result is that an apparent viscosity reduction across the die lip aids throughput, but the zero-shear viscosity remains high enough to preserve melt curtain integrity during extrusion coating. Processors should not interpret the low MFR as an indication of poor flow under production shear conditions.
The melt phase of 3165LG is processable on single-screw extruders with L/D of 24:1 to 30:1 and moderate compression ratios of 2.5:1 to 3.5:1. Barrier screws are preferred when throughput stability and low melt-temperature overshoot are required. Barrel set points from 160 °C to 210 °C with die temperatures up to 220 °C normally produce melt temperatures of 205–225 °C depending on screw speed and head pressure. Sustained melt temperatures above 230 °C initiate acetic acid elimination, chain scission, and gel formation; above 250 °C, degradation accelerates rapidly. Residence time above 10 min at melt temperatures above 220 °C should be avoided, and shutdown procedures should include purging with a low-MFR polyolefin to prevent carbonized deposits in dead spots.
For extrusion coating onto aluminium foil, paperboard, or oriented polyester, the recommended die gap is 0.5–0.8 mm, with an air gap of 100–200 mm and chill-roll temperatures of 15–25 °C. Higher melt strength allows the web to resist draw resonance at line speeds where lower-MFR grades lose edge stability. Processors running a 90 mm extruder with 30:1 L/D often observe that screw speeds above 80 min⁻¹ can add sufficient shear heating to move melt temperature toward 225 °C even when barrel set points are lower. Melt temperature should therefore be measured directly rather than inferred from barrel settings.
Moisture pickup is generally low, but pellets stored in bulk bags or silos under relative humidity above 60% can develop surface moisture sufficient to produce surging and surface defects. Pre-drying in a desiccant dryer at 65–70 °C for 2–4 h is recommended after extended open storage. Regrind addition is possible in multilayer film, but the low-gel benefit diminishes when recycled material carries cross-contamination from other polyolefins, inks, or slip additives.
Hot-melt compounding with 3165LG is normally performed in jacketed mixers at 130–160 °C under a nitrogen blanket. In paraffin and microcrystalline wax blends, addition levels of 5–20 wt% raise low-temperature flexibility, cohesive toughness, and adhesion to paperboard without excessive melt-viscosity increase. In EVA-based hot-melt adhesives, typical formulations use 18–35 wt% polymer, 25–45 wt% tackifier, and 10–30 wt% wax, with the exact balance controlled by cloud point, ring-and-ball softening point, and viscosity measured in accordance with ASTM D3236-88 at the chosen application temperature. The low MFR of 3165LG favours formulations requiring cohesive strength and extended open time rather than deep penetration into highly porous substrates.
The 3165LG grade is positioned for food-contact structures, but the low-gel designation alone does not constitute regulatory clearance. Ethylene-vinyl acetate copolymers are authorized under FDA 21 CFR 177.1350 when the finished article meets the specified extractable fraction and use conditions. For adhesives used in food packaging, FDA 21 CFR 175.105 may apply. Under EU Regulation 10/2011, food-contact plastics must not exceed an overall migration limit of 10 mg/dm² under the intended contact conditions. Converters are responsible for verifying that residual vinyl acetate monomer, processing aids, and any added masterbatch components comply with the applicable migration limits for the finished multilayer structure.
REACH compliance must be confirmed for the specific EU supply chain, and the grade is commonly supplied with a statement that the polymeric resin is exempt from registration as a polymer under Regulation (EC) No 1907/2006, subject to monomer registration status. RoHS screening under Directive 2011/65/EU is typically limited to metallic or flame-retarded finished articles rather than unfilled EVA resin. For medicinal packaging or pharmaceutical unit-dose applications, published data for this specific configuration is limited; qualification under ISO 10993-1 or pharmacopoeial testing is required when the material is used in primary contact with medicinal products.
Operational boundaries should be observed. The material is not intended for continuous load-bearing service above 60 °C without crosslinking modification. Autoclave steam sterilisation at 121 °C exceeds the crystalline melting range and will distort formed parts. Extended contact with strong oxidising acids, chlorinated solvents, or high levels of copper ions can promote degradation. Avoid combining the melt with high-loading primary amine additives when residual acetic acid can form during high-temperature processing, because acid-base reaction products may destabilise the melt and increase odour or extractables. Frequent lot-to-lot monitoring of melt mass-flow rate and gel count is recommended for sensitive thin-film lines, since normal production variation may be detectable as head-pressure drift or seal-strength scatter in downstream converting.
