| HS Code | 727703 |
| Density | 0.956 g/cm³ |
| Melt Flow Rate | 30 g/10 min (190°C, 2.16 kg) |
| Vinyl Acetate Content | 32 wt% |
| Melting Point | 65°C |
| Freezing Point | 45°C |
| Vicat Softening Point | 42°C |
| Tensile Strength At Break | 10 MPa |
| Elongation At Break | 900% |
| Flexural Modulus | 22 MPa |
| Shore D Hardness | 24 |
| Brittleness Temperature | -70°C |
| Glass Transition Temperature | -35°C |
As an accredited ELVAX 3175LGA Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ELVAX 3175LGA EVA copolymer supplied as pellets in 25 kg polyethylene bags, shrink-wrapped on pallets for safe transport. |
| Container Loading (20′ FCL) | 20′ FCL: 20-foot full container load of ELVAX 3175LGA pellets, packed in 25kg bags, palletized, secured dry, ventilated container. |
| Shipping | ELVAX 3175LGA Ethylene Vinyl Acetate Copolymer is shipped as non-dangerous goods in sealed, moisture-proof bags or containers. Protect from excessive heat and direct sunlight. Avoid creating dust clouds; use grounding during transfers. Store in a cool, dry area to maintain pellet flow and product integrity. |
| Storage | Store ELVAX 3175LGA in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep containers tightly sealed to prevent moisture contamination. Maintain ambient temperatures; avoid excessive humidity. Not compatible with strong oxidizing agents. Ensure proper labeling and segregation from incompatible materials. Follow all local regulations for polymer storage. |
| Shelf Life | Store unopened in a cool, dry area; shelf life is at least two years from date of shipment. |
Packaging case and carton sealing lines run continuous slot-coating systems where ELVAX 3175LGA is charged into a jacketed sigma-blade kneader at 150°C to 180°C with hydrogenated rosin ester tackifier and Fischer-Tropsch wax. The copolymer carries a nominal vinyl acetate content of 18% by weight and a melt index of 3.0 g/10 min under ASTM D1238 at 190°C/2.16 kg, producing a lower plateau viscosity than ethylene-rich grades while retaining cohesive strength in the cooled adhesive film. A formulation window of 25 wt% to 35 wt% EVA, 35 wt% to 50 wt% tackifier, and 10 wt% to 25 wt% wax is used for machine-applied carton sealing; antioxidant addition is held at 0.5 wt% to 1.0 wt% to limit thermal yellowing. Wax type controls open time: paraffin wax at 10 wt% shortens set-to-tack, while Fischer-Tropsch wax at 15 wt% to 20 wt% extends open time for high-speed case erectors. Processing above 200°C accelerates vinyl acetate deacetylation and liberates acetic acid; 316L stainless steel vessels and silicon carbide–hardened gear pumps are specified to prevent acid corrosion. Melt viscosity at 180°C measured by ASTM D3236 with a Thermosel spindle SC4-27 typically falls within 800 mPa·s to 1500 mPa·s for an unfilled adhesive; filler and wax composition shift the curve. Adhesive film performance is screened by ASTM D1876 T-peel on corrugated linerboard and ASTM D903 peel on wood veneer. Indirect food-contact status relies on FDA 21 CFR 175.105; the resin itself is subject to FDA 21 CFR 177.1350 when used as a component of food-contact articles within the specified vinyl acetate limit.
| Standard or regulation | Test condition or scope | Relevant downstream segment |
|---|---|---|
| ASTM D1238-20 | Melt flow rate at 190°C/2.16 kg | Hot melt adhesive, masterbatch |
| ISO 1133-1:2022 | Melt mass-flow rate method | Compounding, wax modification |
| ASTM D3236-15 | Brookfield viscosity of hot melts | Adhesive, wax coating |
| ASTM D638-14 | Tensile properties at 50 mm/min | Polymer modification |
| ISO 527-2:2012 | Tensile test with type 1A specimen | Polymer modification, foam |
| ISO 179-1:2010 | Charpy notched impact at −40°C | Polyolefin compounding |
| FDA 21 CFR 175.105 | Adhesives for food-contact packaging | Hot melt adhesives |
| FDA 21 CFR 177.1350 | EVA copolymers for food-contact articles | All food-contact segments |
| RoHS Directive 2011/65/EU | Restricted heavy metals | Masterbatch, cable compounds |
| REACH Regulation (EC) No 1907/2006 | SVHC communication, Annex XVII restrictions | All segments |
Compounding sheet lines for impact-modified polyethylene disclose that ELVAX 3175LGA at 5 wt% to 20 wt% raises Gardner impact resistance under ASTM D5420 in LLDPE film while depressing melt fracture. A co-rotating twin-screw extruder with L/D 40:1 and vacuum devolatilization at barrel 8 is used; barrel temperatures are profiled from 160°C at feed to 220°C at die, with the vent maintained at 0.08 MPa below atmosphere to strip residual moisture and low-molecular-weight volatiles. The resin is pre-dried at 60°C for 4 h in a desiccant dryer when ambient relative humidity exceeds 60%; failure to pre-dry produces surface splay and intermittent bubble formation in strand pelletizing. Screw configuration uses two sets of kneading blocks located before and after the side-feed port; high-shear upstream dispersion of EVA domains below 2 µm is required for Charpy impact transition, while downstream distributive mixing avoids re-agglomeration. The melt temperature at the screw tip is monitored with an infrared probe and controlled to 225°C maximum, because sustained exposure above 230°C generates acetic acid that etches nitrided screw surfaces and shortens screw life relative to neutral PE grades. Formulations are tested by ISO 527-2 for tensile yield and ISO 179-1 for Charpy notched impact at −40°C; a compound containing 10 wt% EVA in LLDPE demonstrates lower brittle fracture than the unmodified resin. Terminal articles include automotive interior trim compounds, flexible geomembrane liners, and freezer-grade collapsible packaging film. Heavy metal and brominated flame retardant restrictions are verified under RoHS Directive 2011/65/EU; food-contact compounds follow EU Regulation 10/2011 migration limits when applicable.
Poured container candle formulations and industrial laminating coatings require a hard wax matrix with reduced crack propagation; ELVAX 3175LGA is let down at 2 wt% to 10 wt% into paraffin or Fischer-Tropsch wax at 130°C to 160°C in a low-shear turbine mixer. The ethylene segments restrict crystal growth in paraffin, raising congealing point and gloss, while the 18% vinyl acetate content reduces brittle fracture on cooling. Batch temperature must not exceed 180°C during letdown because wax oxidation and EVA deacetylation compete; nitrogen blanketing and stainless steel vessels are standard. Viscosity of the finished wax compound at 100°C is measured by ASTM D3236 and adjusted with microcrystalline wax content to maintain dip-coating flow. Terminal products include container candle overdipping, corrugated board moisture barriers, and paper cup side-seam coatings. Compliance with FDA 21 CFR 175.250 for paraffin coatings is reviewed when coated board contacts dry food; migration of vinyl acetate from the coated substrate is evaluated under FDA 21 CFR 177.1350 end-use limitations.
Compression molding plants producing EVA-based foam sheeting for midsoles and sandals run ELVAX 3175LGA as a hardness modifier in blends with higher-VA EVA grades. The direct use of an 18% VA resin in chemically blown foam is not typical for low-density (0.15 g/cm³ to 0.25 g/cm³) midsole material because higher vinyl acetate grades improve filler acceptance and reduce hardness; published data for this specific configuration is limited. When used, ELVAX 3175LGA is blended at 20 wt% to 40 wt% with a 28% VA EVA and compounded on a two-roll mill at 100°C to 110°C with azodicarbonamide at 2.5 phr to 4.0 phr, dicumyl peroxide at 0.8 phr to 1.2 phr, zinc oxide at 1 phr to 2 phr, and stearic acid at 0.5 phr. The sheet is compression molded at 160°C to 175°C under 15 MPa clamp pressure, then expanded at 165°C to 180°C in a second press. Foam density and compression set are controlled by crosslink density and blowing agent decomposition kinetics; the exothermic decomposition of azodicarbonamide requires water-cooled platens to prevent scorch. Terminal components include non-waterproof sandal soles, exercise mats, and inner sockliners. REACH Annex XVII entries for azodicarbonamide and residual peroxide by-products are checked before shipment; heavy metals in pigments are controlled under EN 71-3 when articles are sold as children's goods.
Co-rotating twin-screw pelletizing lines for high-carbon-black masterbatch use ELVAX 3175LGA as a wetting carrier because the vinyl acetate dipole reduces interfacial tension with furnace black aggregates. A masterbatch formulation containing 30 wt% to 50 wt% EVA, 50 wt% to 70 wt% carbon black, and 1 wt% processing aid is fed through a side-stuffer into a L/D 44:1 co-rotating twin-screw extruder. Barrel temperatures are limited to 200°C at the discharge zone to protect organic surface treatments on the carbon black and to avoid acetic acid release from the EVA phase. Melt pressure at the screen changer is monitored; excursions above 12 MPa indicate inadequate dispersion or screen blockage. Vacuum venting at 0.07 MPa below atmosphere removes adsorbed moisture from carbon black and prevents pinholes in blown film. The finished masterbatch is evaluated by ISO 1133-1:2022 melt flow rate and ASTM D3265 tinting strength in blown LLDPE film. Terminal applications include agricultural greenhouse film, cable jacketing, and antistatic packaging. Regulatory compliance for heavy metals follows EU Regulation 10/2011 and RoHS Directive 2011/65/EU; polycyclic aromatic hydrocarbon limits for carbon black in food-contact film are verified under EU Regulation 10/2011.
Plants producing polymer-modified bitumen for roofing membranes and road binder add ELVAX 3175LGA pellets into a high-shear rotor-stator mixer at 170°C to 180°C. The dosage for hot-mix asphalt is 3 wt% to 6 wt% by mass of bitumen; for roll-applied waterproofing membranes the proportion rises to 8 wt% to 15 wt% to increase softening point and low-temperature bending resistance. The EVA phase swells and disperses under high shear, raising binder viscosity to 2.0 Pa·s to 4.0 Pa·s at 135°C as measured by ASTM D4402. Storage stability is a critical limit: phase separation occurs when mixing shear is insufficient, so continuous circulation and overhead nitrogen are used. Polymer-modified bitumen is tested by EN 14023 framework specifications and ASTM D5976 for polymer content and viscoelastic response. Terminal products include torch-applied polyester-reinforced roofing membranes, self-adhesive bituminous sheets, and anti-rutting road binders for heavy axle loads. Compliance with REACH Annex XVII restrictions on PAH in bitumen products is verified at blend level.
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ELVAX 3175LGA is a pelletized ethylene vinyl acetate copolymer whose manufacturer-reported vinyl acetate content is 18 wt%. The melt mass-flow rate is 6.0 g/10 min when determined at 190 °C under 2.16 kg according to ISO 1133-1:2022. Density at 23 °C is 0.94 g/cm³ according to ISO 1183-1:2019. The combination of mid-range vinyl acetate and mid-range melt flow rate positions the product in hot-melt adhesive compounds, heat-seal layers, and polyolefin modification where lower processing temperatures are required and wax compatibility must be retained. The LGA designation is a manufacturer-specific product code; it does not replace lot-specific certificates of analysis.
| Property | Representative value | Test method |
|---|---|---|
| Vinyl acetate content | 18 wt% | ASTM D5594-18 |
| Melt mass-flow rate | 6.0 g/10 min | ISO 1133-1:2022 |
| Density | 0.94 g/cm³ | ISO 1183-1:2019 |
| Vicat softening point | 78 °C | ASTM D1525-17e1 |
| Differential scanning calorimetry melting peak | 86 °C | ISO 11357-3:2018 |
| Shore A hardness | 88 | ISO 868:2003 |
| Tensile strength at break | 12 MPa | ISO 527-2:2012 |
| Elongation at break | 700 % | ISO 527-2:2012 |
The mid-range vinyl acetate content reduces the crystalline melting peak to approximately 86 °C and Vicat softening temperature to 78 °C, as shown in Table 1. Glass transition temperature is not used as a specification; published values for this configuration are limited but are generally below -20 °C. The reduction in crystallinity relative to a 12 wt% VA copolymer provides lower sealing temperature and higher impact toughness, while the retained crystallinity relative to a 28 wt% VA grade maintains room-temperature modulus and lowers blocking tendency.
Compounding lines using co-rotating twin-screw extruders with L/D 40:1 operate the resin between 160 °C and 200 °C. A typical barrel profile sets the feed zone at 120 °C, the intermediate zones at 180 °C, and the die at 190 °C. The resin is not hygroscopic, but surface condensation on cold pellets occurs when sacks are opened at relative humidity above 60 %. For such conditions, pellets are dried in a desiccant dryer at 60–70 °C for 2–4 h to a dew point of -20 °C before extrusion.
Above 230 °C, acetate group elimination becomes kinetically significant. The evolved acetic acid lowers melt pH on contact surfaces, accelerates chain scission, and produces a brownish cast in unpigmented compounds. Lines that intentionally process at 190–200 °C are fitted with atmospheric or vacuum venting at -0.08 MPa to remove the by-product. Because acetic acid corrodes copper-based alloys, stainless steel 304 or 316 contact surfaces are specified for the die, screws, and melt piping. Multi-pass extrusion under high shear is used to assess melt flow rate drift; a shift greater than 10–15 % relative to the virgin pellet indicates molecular weight loss from thermal or mechanical chain scission.
Below 150 °C, homogenization with high-molecular-weight tackifier resins can become incomplete on short L/D machines. The resulting viscosity heterogeneity appears as striping or deposit formation in slot-die coating. Capillary rheometry under ISO 11443 is used to generate the shear-viscosity curve at 190 °C because the single-point melt index does not capture shear thinning. In melt pumping, die pressures below 120 bar are preferred for hot-melt strand and slot-die operations; higher pressures can indicate insufficient melt temperature or poor mixing.
In hot-melt adhesive production, the neat resin is only one variable in a ternary system of polymer, tackifier, and wax. A production-scale co-rotating twin-screw extruder with screw diameter 32 mm and L/D 40:1 is commonly operated with a starting formulation near 35 wt% ELVAX 3175LGA, 45 wt% C5 hydrocarbon tackifier, and 20 wt% microcrystalline wax at zone set points of 120 °C, 180 °C, and 190 °C. Low-bulk-density tackifier flakes are introduced through a side stuffer; throughput on such lines is often limited by tackifier feed intake rather than by the EVA melt viscosity.
Adhesion is substrate-dependent. On corona-treated polyethylene with surface energy above 38 mN/m, T-peel behavior under ASTM D1876 at 0 °C typically shows cohesive failure when wax is held near 20 wt%. When wax loading exceeds 25 wt%, failure can shift to interfacial delamination. The 18 wt% vinyl acetate content provides polarity to wet aluminium foil and polyester films while retaining enough compatibility with microcrystalline waxes. By comparison, 28 wt% VA EVA can improve low-temperature adhesion but may phase-separate earlier in high-wax packaging formulas.
Compounded adhesive viscosity at 180 °C is measured with a Brookfield RVT viscometer and Thermosel spindle 27. Wheel-applicator lines generally require less than 1,500 mPa·s; slot-die coating lines can tolerate up to 5,000 mPa·s. Open time is typically tested on 40-lb kraft board with a coating weight of 10 g/m². Publicly available open-time data for this specific grade in all packaging configurations are limited; open time must be determined by internal laboratory protocol because no single ISO method controls open time across all line speeds.
Extrusion coating and heat-seal layers use the same lower crystallinity benefit. The 18 wt% vinyl acetate content lowers minimum seal initiation relative to unmodified polyethylene; seal strength is measured under ASTM F88-21 on the final laminate. On aluminium foil and corona-treated polyethylene terephthalate, seal strength develops at lower jaw temperatures, but substrate surface energy must be maintained above 38 mN/m. Seal failure at low temperature can be adhesive if the substrate is not adequately treated; this is a surface-preparation variable, not a resin defect. Compared with lower-VA copolymers, the material may permit a 10–15 °C reduction in heat-seal jaw set point in specific laminates, but lot-specific evaluation is required.
For polyolefin film modification, addition levels from 2 wt% to 10 wt% are used when the target is improved puncture toughness and tear resistance without severe clarity loss. The effect is measured under ISO 7765-1 for dart impact and ISO 6383-2 for tear strength. In color and black masterbatch, the resin is compounded on a twin-screw extruder with L/D 32:1 at 180–200 °C. Dispersion quality is monitored by screen pack pressure rise during extrusion; a rapid pressure increase indicates pigment agglomeration or insufficient specific energy input. The resin’s mid-range melt index supports strand integrity while providing lower viscosity than melt index 2 EVA carriers.
Compared with ethylene-butyl acrylate copolymers of similar melt index, EVA with 18 wt% VA often provides stronger adhesion to polar paper and foil surfaces in hot melts, but thermal stability is lower because of the acetate group. Stabilization and venting requirements are therefore more stringent. Users switching from an EBA or EMA carrier should compare melt flow stability and acid generation over multi-pass extrusion rather than substitute on melt index alone.
Food-contact status is determined for the final article, not for the resin alone. Unfilled ethylene vinyl acetate copolymer with 18 wt% vinyl acetate may be referenced under FDA 21 CFR 177.1350 when the final compound satisfies extraction limitations and end-use restrictions. In the European Union, plastics intended for food contact are assessed under Regulation (EU) No 10/2011; total migration is measured under EN 1186-1, and specific migration of vinyl acetate is assessed under EN 13130. Tackifiers, waxes, and antioxidants must be separately authorized. REACH registration under EC 1907/2006 and RoHS recast 2011/65/EU are addressed by manufacturer compliance declarations, but downstream addition of fillers or pigments requires a new conformity assessment.
The product is selected when lower heat-seal initiation than a 12 wt% VA resin is required, but wax compatibility cannot be sacrificed to the degree observed with 28 wt% VA resins. The differences are summarized in Table 2, which uses representative published values for adjacent EVA grade families rather than lot-specific data.
| Feature | 12 wt% VA EVA family | ELVAX 3175LGA | 28 wt% VA EVA family |
|---|---|---|---|
| Vinyl acetate content | 12 wt% | 18 wt% | 28 wt% |
| Melt index range | grade-dependent, often 2–8 g/10 min | 6.0 g/10 min | grade-dependent, often 3–25 g/10 min |
| Crystalline melt peak | approximately 95 °C | approximately 86 °C | approximately 70 °C |
| Vicat softening temperature | approximately 85–90 °C | approximately 78 °C | approximately 55–65 °C |
| Low-temperature flexibility | lower | moderate | higher |
| Adhesion to polar substrates | lower | moderate-to-good | higher |
| Wax compatibility in hot-melt systems | higher | balanced | lower |
Unstabilized ELVAX 3175LGA is not formulated for outdoor use. Exposure to UV and thermal oxidation cleaves the acetate ester group, generating acetic acid, surface tack, and discoloration. Antioxidant packages containing 0.05–0.15 wt% hindered phenolic primary antioxidant and 0.05–0.10 wt% phosphite secondary antioxidant are incorporated during compounding. Storage above 40 °C in unventilated containers is avoided because pellet surface oxidation can shift melt index. Unopened bags should be consumed within 24 months. High-temperature compounding with strong alkalis or primary amine additives is not recommended because ester hydrolysis can cause premature viscosity drift. Calcium stearate at 0.02–0.05 wt% is used as an acid scavenger when acetic acid formation must be controlled during hot-melt manufacture.
