| HS Code | 567518 |
| Vinyl Acetate Content | 28% |
| Melt Flow Index | 5 g/10min (190°C/2.16kg) |
| Density | 0.950 g/cm³ |
| Melting Point | 75°C |
| Vicat Softening Point | 70°C |
| Tensile Strength | 150 kg/cm² |
| Elongation At Break | 700% |
| Hardness Shore A | 85 |
| Tear Strength | 50 kg/cm |
| Brittleness Temperature | -70°C |
As an accredited LG EVA 28005 Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Available in 25 kg bags, LG EVA 28005 Ethylene Vinyl Acetate Copolymer is supplied as free-flowing pellets for efficient handling. |
| Container Loading (20′ FCL) | Load 20′ FCL with palletized 25kg bags of LG EVA 28005, secured in dry container, protected from moisture and heat. |
| Shipping | LG EVA 28005 is shipped as solid pellets in sealed multi-wall paper or PE-lined jumbo bags, palletized and containerized. Keep dry, cool, and away from direct sunlight, moisture, and strong oxidizers during transit. Avoid excessive compression and rough handling to prevent bag damage, contamination, and pellet deformation. |
| Storage | Store LG EVA 28005 in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep the original container tightly sealed to prevent moisture pickup and contamination. Avoid excessive stacking or compression. Maintain moderate room temperature; ideal storage conditions help preserve flow properties and prevent degradation. Use within the manufacturer’s recommended shelf life for best processing performance. |
| Shelf Life | Shelf life is typically 2 years from manufacture when stored in original, unopened packaging in a cool, dry place. |
LG EVA 28005, with nominal vinyl acetate content of 28 wt% and melt flow index of 5 g/10 min under ISO 1133-1:2022, is processed into microcellular footwear midsole formulations by a route in which the crosslinking reaction and the blowing reaction are deliberately overlapped rather than separated. On a two-roll mill set at 115–125 °C or in an internal mixer with a fill factor of 0.75–0.85, the base formulation combines 100 phr LG EVA 28005 with 3.0–5.5 phr azodicarbonamide, 0.5–0.8 phr dicumyl peroxide, 1.0–2.0 phr zinc oxide, 0.5–0.8 phr stearic acid, and 5–15 phr calcium carbonate; the mix is then sheeted or pelletized before foaming. Downstream conversion takes place on rotary injection lines with multi-clamp carousels or on 300–500 t compression presses, with melt temperature held at 165–180 °C and mold dwell of 8–12 min; wall temperatures above 185 °C generate internal blowholes and surface delamination, while wall temperatures below 160 °C leave unreacted peroxide and produce density above 0.20 g/cm³. Foam density is controlled within 0.10–0.20 g/cm³ using ISO 845:2006, Shore A hardness within 40–60 using ASTM D2240-15, and tensile properties using ASTM D638-14. EU shipment requires REACH Regulation (EC) No 1907/2006 registration for the polymer and residual blowing-agent decomposition products, RoHS Directive 2011/65/EU screening for lead and cadmium in pigment batches, and ISO 8124-3:2020 migration limits when the foam enters children’s play mats. Terminal product types include double-density midsoles, single-density outsoles, flip-flop soles, yoga blocks, gym mats, and interlocking children’s floor tiles.
In packaging-grade hot melt adhesive formulation, LG EVA 28005 operates as the backbone polymer at 25–35 wt% with hydrogenated C5/C9 tackifier resin at 35–45 wt%, paraffin or Fischer-Tropsch wax at 15–25 wt%, and a hindered phenolic antioxidant at 0.2–0.5 wt%; the components are melted in a jacketed sigma-blade or planetary mixer at 160–180 °C under nitrogen to limit thermal oxidative chain scission. Application to corrugated case and carton lines uses slot-die or roller coaters at 170–190 °C, with Brookfield Thermosel viscosity of 1,000–3,000 mPa·s measured via ASTM D3236-15; nozzle-fed bookbinding lines operate at 2,500–5,000 mPa·s to prevent adhesive soak-through in spine paper. Open time is controlled by wax molecular weight, and set time must remain below 1–2 s for high-speed flap compression. Adhesives intended for food packaging fall under FDA 21 CFR 175.105 and EU 10/2011 overall migration for the final laminate, while REACH Regulation (EC) No 1907/2006 and RoHS Directive 2011/65/EU apply to the blend before application. Terminal components include deep-freeze case sealing, bookbinding adhesion, carton closing, sleeve labeling, and tray assembly.
Filled cable compounds based on LG EVA 28005 exploit the 28 wt% vinyl acetate content to disperse aluminum trihydrate at 150–180 phr; beyond 180 phr, tensile elongation measured per ISO 527-2:2012 declines below 150% and surface pitting appears on extruded jackets because melt strength can no longer accommodate the volume fraction of filler. The initial compound is prepared in a co-rotating twin-screw extruder with 40:1 L/D and barrel set points of 130–160 °C, using a side feeder for ATH and a vacuum vent to strip moisture; the resulting pellet is then extruded on a 24:1 L/D single-screw CV line with a crosshead die at 120–150 °C and peroxide-cured with dicumyl peroxide at 1.0–1.8 phr in a continuous vulcanization tube at 180–250 °C, or silane-grafted for low-voltage insulation where moisture cure is preferred. ATH water release above 200 °C mandates a maximum melt temperature below this threshold before the curing section, and pre-drying at 60–70 °C for 3–4 h is required when ambient relative humidity exceeds 60% to prevent steam porosity. Compliance is verified through IEC 60332-1-2:2004 flame propagation, EN 50267-2-3:1998 halogen acid gas content, ISO 4589-2:2017 oxygen index, and REACH Regulation (EC) No 1907/2006 plus RoHS Directive 2011/65/EU for restricted substances. Finished product types include low-voltage power cable insulation, control cable jackets, photovoltaic DC cable insulation, and railway rolling-stock wire sheathing.
| Application | Regulatory instrument | Test method | Typical control parameter |
|---|---|---|---|
| Footwear microcellular foam | REACH (EC) No 1907/2006 | ISO 845:2006 density | 0.10–0.20 g/cm³ |
| Packaging hot melt | FDA 21 CFR 175.105 | ASTM D3236-15 viscosity | 1,000–5,000 mPa·s |
| HFFR cable jacket | EN 50267-2-3:1998 | ISO 4589-2:2017 oxygen index | ≥30% |
| Filler masterbatch | FDA 21 CFR 177.1520 | ISO 1133-1:2022 MFR | 5 g/10 min |
| Polyolefin modification | 2000/53/EC | ISO 180:2023 Izod | report value |
When filler loadings exceed 75 wt% in a polyolefin masterbatch, the carrier resin must wet the filler surface and prevent re-agglomeration during letdown; LG EVA 28005 at 20–30 wt% of the masterbatch is used for calcium carbonate, talc, and titanium dioxide concentrates because the 28 wt% vinyl acetate groups adsorb onto polar filler surfaces more effectively than homo-polyethylene carriers. The production process runs on a co-rotating twin-screw extruder with 36:1 L/D, side-feeding the filler downstream of the melting zone and applying vacuum devolatilization at -0.08 MPa to remove surface moisture; die-face pelletizing with chilled water yields pellets with a melt flow rate controlled per ISO 1133-1:2022. The masterbatch is let down at 2–5% in LLDPE film, injection molding, or extrusion coating operations. Applicable compliance includes REACH Regulation (EC) No 1907/2006, RoHS Directive 2011/65/EU, and FDA 21 CFR 177.1520 for polyolefin food contact when the masterbatch is used in food packaging films. Published data for the exact viscosity reduction at 80 wt% filler in this specific LG EVA 28005 carrier grade is limited compared with the well-established mineral-filled masterbatch systems based on lower-VA EVA carriers.
Addition of LG EVA 28005 at 5–15 wt% to polypropylene or high-density polyethylene is performed on a co-rotating twin-screw extruder at 190–220 °C with 32:1 L/D and a strand pelletizing line; the dispersed EVA domains raise notched Izod impact measured according to ISO 180:2023 by an amount dependent on domain size and interparticle distance, and environmental stress crack resistance is measured via ISO 22088-2:2006 under 10% aqueous Igepal CO-630 at 50 °C. Published data for this specific LG EVA 28005 grade as a PP/HDPE impact modifier are limited, so development trials should compare 5 wt%, 10 wt%, and 15 wt% letdown levels against the base resin using notched Izod and tensile modulus per ISO 527-1:2019. The trade-off is loss of tensile modulus and yield stress, which constrains use in high-stiffness structural parts. This compound is used in automotive interior trim skin layers, wire harness conduit, corrugated drainage pipe joints, and blow molded containers for aggressive liquids. Regulatory compliance follows REACH Regulation (EC) No 1907/2006, RoHS Directive 2011/65/EU, and automotive OEM heavy metal limits under 2000/53/EC end-of-life vehicle directive; no food-contact claim applies unless specific migration testing under EU 10/2011 is completed. Process limitations include phase inversion at EVA levels above 25 wt% and the need to avoid processing temperatures above 230 °C to prevent acid-catalyzed chain degradation.
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LG EVA 28005 is an ethylene vinyl acetate copolymer with a nominal vinyl acetate content of 28.0 wt% and a melt flow rate of 5.0 g/10 min at 190°C/2.16 kg under ASTM D1238. The published density is 0.950 g/cm³ at 23°C under ASTM D1505, and the nominal Shore A hardness is 80 under ASTM D2240. This combination positions the resin as a medium-VA, low-flow EVA for applications that require melt strength during gas expansion, low-temperature flexibility, and filler acceptance. The grade is used in crosslinked foam compounding, injection-molded midsole foam, gasketing, and polyolefin blend modification. It differs from lower-VA grades in having reduced crystallinity and lower stiffness, and it differs from higher-melt-flow grades in retaining enough viscosity to stabilize cell walls during foam formation.
The vinyl acetate units inserted along the ethylene chain shorten the length of crystallizable methylene sequences. At 28.0 wt% VA, the melting peak measured by differential scanning calorimetry under ASTM D3418 is typically 70–75°C, compared with 82–88°C for a lower-VA EVA class near 18 wt%. The reduction in crystalline order lowers flexural stiffness and melting point while increasing elongation and polar interaction with mineral fillers and coupling agents. The Shore A hardness of 80 is therefore softer than low-VA EVA but harder than high-VA resins near 40 wt% VA.
The melt flow rate of 5.0 g/10 min is low for an EVA containing 28 wt% VA. This indicates a relatively high-molecular-weight melt with higher extrusion back-pressure, higher melt torque, and slower cavity filling than a high-flow EVA at 25–30 g/10 min. The benefit appears in foam processing: the melt resists bubble coalescence and holds cell walls open during blowing-agent expansion. The limitation appears in thin-wall injection molding, where filling pressure rises and short-shot sensitivity increases. The grade is therefore selected when closed-cell retention and dimensional uniformity matter more than maximum melt fluidity.
Thermal stability is controlled by the acetate group. At melt temperatures above 220°C, ethylene vinyl acetate resins can undergo autocatalytic acetic acid elimination. The degradation is less likely at the typical processing range of 160–190°C, but start-up overshoots and dead zones should be minimized. Published data for exact deacetylation kinetics in this specific grade is limited; however, the behavior follows the established thermal stability trend for medium-to-high VA EVA resins.
Formulations based on LG EVA 28005 for crosslinked midsole foam typically contain dicumyl peroxide at 0.8–1.2 phr, zinc oxide at 1–3 phr, stearic acid at 0.5–1.0 phr, calcium carbonate at 10–30 phr, and a chemical blowing agent such as azodicarbonamide at 1.5–4.0 phr. The exact loading is determined by the target foam density, hardness, and compression set. The low melt flow index becomes functionally important when the blowing agent decomposes. Gas bubbles nucleate at the gate and expand under pressure drop, and the 5.0 g/10 min melt has enough extensional viscosity to prevent bubble collapse during the short foaming window before peroxide crosslinking locks the cell structure.
During direct injection expanded foam processing, the shot size is often reduced by 20–50% relative to a solid part. The nozzle melt temperature is normally held below 190°C, while the mold surface is maintained at 165–175°C to activate peroxide cure and blowing-agent decomposition. Production-scale behavior on a 150–250 metric ton hydraulic injection machine with a screw length-to-diameter ratio of 20:1 to 24:1 shows that shot-size repeatability and back pressure affect foam density more than small barrel temperature changes. A batch-to-batch VA variation of ±0.5 wt% can shift foamed part hardness by approximately 2–3 Shore A points and can alter cell diameter distribution. Closed-loop injection velocity control reduces gas loss at the melt front. If the melt temperature exceeds 220°C for more than a few minutes, acetic acid evolution becomes a tool-corrosion risk. Strong amine-based additives should be avoided in high-temperature systems because they can accelerate deacetylation and destabilize the polymer matrix.
Compounding operations that dilute LG EVA 28005 with mineral fillers commonly use a co-rotating twin-screw extruder with an L/D ratio of 30:1 to 40:1. The polymer is fed in the main feed throat, while fillers enter downstream through side-feed to limit torque spikes. Calcium carbonate loadings of 10–30 wt% are used in midsole compounds because the VA content promotes filler wetting and lowers the viscosity penalty relative to low-VA EVA. The melt temperature is maintained below 180°C for filler-intensive recipes to reduce chain scission and acid scavenging demand. Devolatilization at atmospheric or vacuum pressure removes moisture and low-molecular-weight by-products. If ambient relative humidity exceeds 60%, predrying at 60–70°C for 2–4 h is required to prevent surface splay in subsequent molding.
The crosslinking reaction in LG EVA 28005 foam compounds is initiated by organic peroxide decomposition. Dicumyl peroxide at 0.8–1.2 phr is common because its decomposition rate is slow enough below 150°C to allow screw recovery, but sufficiently fast at 165–175°C to cure the EVA after cavity filling and gas expansion. The resulting crosslink network stabilizes the foam and improves compression set. Target gel fraction is usually above 70% for midsole applications, although published data for this specific grade-formulation combination is limited. Undercure produces high compression set and cell collapse after repeated loading; overcure increases hardness and reduces resilience.
The main process conflict is that blowing-agent decomposition overlaps the peroxide cure temperature. Gas evolution, melt viscosity increase, and crosslink formation occur simultaneously. If the mold opens too early, the partially cured melt cannot contain the gas and surface blisters form. If the mold opens too late, the cured skin restricts expansion and the part does not reach the designed thickness. Scorch is another failure mode. Premature crosslinking in the barrel creates gel particles that will not redisperse in later stages. The shot size is therefore kept between 25% and 75% of barrel capacity, and the cushion is minimized below 10 mm to limit residence time at the screw tip. Low-shear screw elements and feed-zone cooling are used during compounding to avoid local temperature spikes.
LG EVA 28005 differs from LG EVA 2828 despite the same nominal 28 wt% VA content. LG EVA 2828 has a nominal melt flow rate of 28 g/10 min, which makes it suitable for thin-wall injection parts and high-speed extrusion but reduces its melt strength for foam expansion. LG EVA 28005, at 5.0 g/10 min, is the low-flow choice for closed-cell foam and high-filler compounds. LG EVA 1824 has a lower VA content of 18 wt% and a nominal melt flow rate of 24 g/10 min; it provides higher stiffness, a higher melting point, and faster flow but is less able to retain softness and filler polarity. LG EVA 4015, with 40 wt% VA and a nominal melt flow rate of 15 g/10 min, offers more adhesion and softness but lower high-temperature dimensional stability and increased blocking tendency.
| Property | Test method | Nominal value |
|---|---|---|
| Vinyl acetate content | ASTM D5594 / internal FTIR | 28.0 wt% |
| Melt flow rate | ASTM D1238 / ISO 1133-1, 190°C/2.16 kg | 5.0 g/10 min |
| Density | ASTM D1505 / ISO 1183-1 | 0.950 g/cm³ at 23°C |
| Shore A hardness | ASTM D2240 / ISO 868, 15 s | 80 |
| DSC melting peak | ASTM D3418 / ISO 11357-3 | 70–75°C |
| Grade | Nominal VA content | Nominal melt flow rate at 190°C/2.16 kg | Process positioning difference |
|---|---|---|---|
| LG EVA 1824 | 18 wt% | 24 g/10 min | Stiffer, higher-melting, faster-flowing |
| LG EVA 28005 | 28 wt% | 5.0 g/10 min | Low flow, high melt strength, medium softness |
| LG EVA 2828 | 28 wt% | 28 g/10 min | Same VA as 28005, high flow for fast filling |
| LG EVA 4015 | 40 wt% | 15 g/10 min | Higher adhesion and softness, lower high-temperature strength |
Storage before processing should maintain pellet temperature below 40°C and avoid prolonged ultraviolet exposure to limit oxidative surface layer formation. At ambient relative humidity above 60%, predrying at 60–70°C for 2–4 h is required before molding or extrusion. The base resin may be acceptable for food-contact uses under FDA 21 CFR 177.1520 and EU 10/2011, but final compliance is formulation-specific and requires migration testing under the intended time and temperature conditions. Medical-device applications require additional ISO 10993 biocompatibility evaluation; the standard EVA datasheet does not establish direct medical-grade status. Exposure to chlorinated hydrocarbons, strong organic acids, and unsaturated oils can extract low-molecular-weight fractions and cause dimensional change. These operational boundaries distinguish the grade from higher-molecular-weight or higher-crystallinity EVA products and are part of the selection logic for downstream processing.
