| HS Code | 522258 |
| Vinyl Acetate Content | 4.0 wt% |
| Melt Index | 3.0 g/10 min |
| Density | 0.924 g/cm³ |
| Melting Point | 106 °C |
| Vicat Softening Point | 86 °C |
| Tensile Strength At Break | 19 MPa |
| Elongation At Break | 700 % |
| Shore D Hardness | 45 |
| Low Temperature Brittleness | -70 °C |
| Dielectric Constant | 2.3 |
| Volume Resistivity | 1E15 ohm·cm |
| Dissipation Factor | 0.0005 |
| Flexural Modulus | 150 MPa |
| Water Absorption | <0.01 % |
As an accredited Lotte EVA VA430(Lotte Seetec VS430) factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packed in 25 kg woven bags, Lotte EVA VA430/Seetec VS430 is supplied on pallets for safe storage and transport. |
| Container Loading (20′ FCL) | Lotte EVA VA430 (Seetec VS430) is packed in 25 kg bags and loaded into a 20′ FCL container under dry conditions, palletized. |
| Shipping | Lotte EVA VA430 (Lotte Seetec VS430) ships as non-hazardous ethylene-vinyl acetate copolymer resin pellets in sealed 25 kg bags or jumbo bags. Store dry, cool, ventilated, away from direct sunlight and ignition sources. No special dangerous-goods classification; follow local regulations and the SDS. |
| Storage | Store Lotte EVA VA430 (Lotte Seetec VS430) in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep in original, sealed packaging on pallets to prevent moisture pickup and contamination. Avoid damaging bags, and stack securely. Maintain good housekeeping and separate from incompatible chemicals such as strong oxidizers. |
| Shelf Life | Typically 24 months from date of manufacture when stored in a cool, dry, well-ventilated area in original packaging. |
Lotte EVA VA430, listed interchangeably as Lotte Seetec VS430, is a high-melt-flow ethylene-vinyl acetate copolymer with a nominal vinyl acetate content of 28 wt% and a melt flow index of 43 g/10 min under ISO 1133-1:2022 at 190 °C/2.16 kg. Typical density is 0.950 g/cm³ under ISO 1183-1:2019. The polar acetate group increases compatibility with polar additives, fillers, and plasticisers, while the 43 g/10 min flow rate reduces compounding torque and improves wet-out on porous paper, nonwoven, and inorganic filler surfaces. The same high flow rate lowers melt strength, so each downstream track must control sag, die-lip build-up, foam cell coalescence, and crosslinking scorch through separate formulation and processing rules.
Lotte VA430 is compounded into hot-melt adhesives for folding carton side seams, corrugated case closing, bookbinding spine glue, and edge banding. In a heated sigma-blade mixer at 160–180 °C, the resin is blended with a C9 hydrocarbon tackifier having a ring-and-ball softening point of 95–105 °C and a Fischer-Tropsch or paraffin wax with a congealing point of 65–70 °C. The 43 g/10 min melt flow index permits shorter batch cycles than EVA grades with melt flow index below 15 g/10 min. Finished adhesive viscosity at 160 °C is normally controlled between 800 mPa·s and 2,500 mPa·s under ASTM D3236-88(2021). Slot-die coating weight stability is governed by the ratio of low-shear viscosity to high-shear viscosity. Excessive tackifier loading above 45 phr can cause edge bleed and die-lip carbonised build-up after 4–6 h of continuous operation. Packaging adhesives are evaluated by ASTM D1876-08(2023) T-peel; fibre-tear values above 90 % at −10 °C are attainable when the formulation retains 30–35 phr VA430. Because hot-melt adhesives are applied at 150–170 °C, pot temperatures above 200 °C must be avoided; deacetylation releases acetic acid and increases viscosity drift. Food-contact adhesives for paper and paperboard are assessed under 21 CFR 175.105; the neat resin alone does not constitute an approved adhesive article.
| Component | HM-1 | HM-2 | HM-3 |
|---|---|---|---|
| Lotte EVA VA430 | 30 phr | 35 phr | 40 phr |
| C9 hydrocarbon tackifier, softening point 100 °C | 45 phr | 40 phr | 35 phr |
| Paraffin wax, congealing point 65 °C | 20 phr | 20 phr | 20 phr |
| Antioxidant, tetrakis[methylene-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate]methane | 0.5 phr | 0.5 phr | 0.5 phr |
| Brookfield viscosity at 160 °C, 5 rpm | approx. 900 mPa·s | approx. 1,250 mPa·s | approx. 1,800 mPa·s |
As a matrix resin in chemically crosslinked closed-cell EVA foam, VA430 is compounded on a two-roll mill at 80–100 °C with 100 phr VA430, 2.5–5.5 phr azodicarbonamide blowing agent, 0.7–1.0 phr dicumyl peroxide, 1.2–2.0 phr zinc oxide, 0.5–1.0 phr stearic acid, and 10–20 phr calcium carbonate. Roll temperature must remain below the dicumyl peroxide one-minute half-life temperature of approximately 171 °C to prevent premature crosslinking. The mixed sheet is expanded in a hydraulic press at 160–175 °C for 8–12 min under 10–15 MPa clamp pressure. Zinc oxide lowers the effective blowing agent decomposition to the press setpoint, while dicumyl peroxide builds a crosslink network sufficient to retain cellular structure during pressure release. Crosslink density is measured as gel content in xylene under ASTM D2765-16; a gel fraction of 60–85 % balances elastic recovery and tear resistance. Foam density is controlled between 80 kg/m³ and 200 kg/m³. Shore C hardness is measured under ASTM D2240-15(2021), and compression set is determined under ASTM D3575-20. Split tear strength above 2.5 N/mm under ISO 34-1:2022 is required for footwear midsoles, yoga blocks, and sports mats. A processing boundary exists because azodicarbonamide decomposition is exothermic; press temperatures above 180 °C can create gas bubbles larger than 500 µm and collapse the foam core.
| Formulation component | Foam F1 | Foam F2 | Foam F3 |
|---|---|---|---|
| Lotte EVA VA430 | 100 phr | 100 phr | 100 phr |
| Azodicarbonamide | 2.5 phr | 4.0 phr | 5.5 phr |
| Dicumyl peroxide | 0.8 phr | 0.8 phr | 0.8 phr |
| Zinc oxide | 1.2 phr | 1.2 phr | 1.2 phr |
| Calcium carbonate | 15 phr | 15 phr | 15 phr |
| Typical foam density | 180 kg/m³ | 120 kg/m³ | 80 kg/m³ |
| Typical Shore C hardness | 55 | 45 | 35 |
Photovoltaic encapsulant film extrusion with VA430 requires compounding with a dialkyl peroxide curing agent, a vinyltrimethoxysilane adhesion promoter, and a hindered amine light stabiliser. The compound is extruded through a slot die at melt temperature 80–105 °C. Die temperature must not exceed 110 °C because the half-life of tert-butyl peroxy-2-ethylhexyl carbonate shortens rapidly near that temperature, and pre-crosslinking in the die lip produces gel particles visible as optical defects. Chill roll temperatures are held at 15–25 °C to freeze the film, reduce blocking, and stabilise film thickness. The film is laminated between glass and backsheet in a vacuum laminator at 145–155 °C for 15–20 min. Post-lamination gel content is measured by ASTM D2765-16 and is specified between 75 % and 90 %. Optical transmittance after lamination should exceed 91 % over the 380–1,100 nm range when tested under ASTM D1003-21. Free-film shrinkage at 120 °C for 3 min is kept below 2 % to avoid cell misalignment. Damp-heat ageing at 85 °C/85 % RH for 1,000 h is required by module qualification sequences such as IEC 61215-2:2021. Published data for this specific VA430 configuration is limited, but the acetate group contributes to glass adhesion while also generating acetic acid during peroxide cure; lamination equipment must provide adequate venting to avoid corrosion of chamber seals.
For low-smoke zero-halogen cable jacketing compounds, VA430 functions as a high-flow polar matrix blended with linear low-density polyethylene or ethylene-octene copolymer. A representative flame-retardant compound contains 100 phr VA430, 150–180 phr precipitated aluminium trihydrate with a median particle size near 2 µm, 3–5 phr zinc borate, 0.5–1.0 phr hindered phenol antioxidant, and 1–2 phr silicone processing aid. The compound is processed on a co-rotating twin-screw extruder with L/D ≥ 40; filler is side-fed after polymer melting to limit screw abrasion. Barrel temperatures above 170 °C accelerate release of water from aluminium trihydrate and cause surface porosity in the extruded jacket. Flame retardance is assessed under IEC 60332-3-24, and limiting oxygen index values typically exceed 30 % O₂ under ISO 4589-2:2017. Acid gas evolution is tested under IEC 60754-1, and combustion gas acidity is assessed under IEC 60754-2. Tensile strength before ageing must exceed 9 MPa and elongation at break 150 % when tested under IEC 60811-501. The high melt flow of VA430 reduces head pressure and improves filler dispersion, but the same property increases melt sag on vertical cable lines; the extrusion die and cooling trough must be positioned close enough to control ovality before the jacket enters the water bath.
Masterbatch producers select VA430 because the 43 g/10 min melt flow index supports high pigment loading, and the vinyl acetate group improves wetting of polar organic pigments. In a 40:1 L/D co-rotating twin-screw extruder with distributive mixing elements, organic pigment loadings of 30–60 phr are dispersed at melt temperatures between 130 °C and 160 °C. Carbon black masterbatches typically use 40–50 phr furnace black. Processing above 160 °C can cause oxidative degradation of the acetate group and shift masterbatch colour. Dispersion quality is checked by a pressure filter test using 14 µm and 5 µm screen packs; final pressure rise should remain below 0.5 bar/kg of masterbatch filtered. Letdown ratio in blown film is commonly 20:1 to 50:1. The carrier must match the viscosity of the letdown resin to avoid visible gel streaks; high-flow VA430 is therefore suited to LDPE and LLDPE film lines where die-lip shear rates fall between 100 s⁻¹ and 1,000 s⁻¹. Concentrates for food-contact packaging require documentation under EU 10/2011 or 21 CFR 178.3297 for colorants used in polymers. Pellets stored at relative humidity above 60 % are dried at 60 °C for 2–3 h before compounding to limit hydrolytic deacetylation and screw corrosion.
Rigid PVC compounders use VA430 at 5–15 phr to raise notched impact strength without introducing the high plasticiser migration of liquid dioctyl phthalate. The compound is dry-blended in a high-speed mixer to 110–120 °C, then melt-compounded on a conical twin-screw extruder with barrel temperatures from 160 °C at the feed throat to 185 °C at the die. Notched Izod impact strength is tested under ISO 180:2019; a shift from 4 kJ/m² to 8–12 kJ/m² is attainable at 10 phr VA430. Tensile modulus is reduced, so load-bearing pipe and profile formulations require wall-thickness re-optimisation. For polylactic acid, VA430 at 5–10 wt% increases elongation at break and reduces sharp notch sensitivity. The blend is processed at 170–190 °C and tested under ASTM D638-14. The vinyl acetate group promotes interfacial adhesion to the ester carbonyl in polylactic acid, but viscosity mismatch at high shear can cause phase inversion if VA430 exceeds 15 wt%. Published data for this specific configuration is limited; small-scale compounding trials are required before commercial scaling.
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Lotte EVA VA430, also listed as Lotte Seetec VS430 in the legacy grade system, is an ethylene-vinyl acetate copolymer with a nominal vinyl acetate content of 43 wt%. The designation places the material in the high-polarity segment of the Seetec EVA portfolio, in which crystalline ethylene lamellae are heavily disrupted. The resulting reduction in crystallinity produces a soft, low-modulus polymer that is normally supplied in pellet form and is melt-compounded downstream rather than used as a neat structural resin. Product-specific melt flow rate, tensile properties, additive composition, and residual monomer levels are controlled by the manufacturer’s certificate of analysis. The current technical data sheet is the primary source for lot-specific values; published secondary data for this exact VS430 designation are limited. The grade is most often encountered in hot melt adhesive production, polymer modification, and applications requiring polar surface wetting at low processing temperatures.
Routine incoming inspection of Lotte EVA VA430 uses standard methods rather than a single index test. Melt mass-flow rate is determined under ASTM D1238-20 or ISO 1133-1:2022 at 190°C with a 2.16 kg load. The melt flow rate is not encoded in the VA430 designation; the manufacturer’s certificate of analysis states the lot-specific value, and the production control window should be taken from the technical data sheet. Vinyl acetate content is verified by Fourier-transform infrared spectroscopy against certified reference resins or by ASTM D5594-18. Density is measured under ISO 1183-1:2019 and typically rises toward 0.98–1.00 g/cm³ at this vinyl acetate level. Differential scanning calorimetry under ASTM D3418-21 shows a broad, low-enthalpy melting endotherm; therefore Vicat softening temperature under ISO 306:2013 is often more informative than melting point as a heat-resistance limit. Hardness, if specified, is reported under ASTM D2240-15. Tensile testing under ASTM D638-14 requires careful strain measurement because the material is soft and extensible; tensile values are secondary in adhesive service.
For melt-processing design, the low-shear melt flow rate is insufficient. Capillary rheometry under ASTM D3835-16 with a 1 mm die and shear rates from 50 s⁻¹ to 5000 s⁻¹ provides apparent viscosity data relevant to hot melt pumping and coating. In production-scale hot melt lines, gear pumps typically require inlet pressures of 0.5–2.5 MPa, and filtration through 100–325 mesh screen packs is used to protect slot-die lips. Batch-to-batch variation in melt flow rate of approximately ±10%, when present, can alter coat weight at constant pump speed; gravimetric mass-flow control is preferred over fixed pump speed. Continuous twin-screw compounding lines for high-VA EVA may operate at screw speeds from 200 rpm to 600 rpm and specific energy inputs of 0.10–0.20 kWh/kg, but these line-dependent values must be confirmed by process capability studies on the actual machine.
Hot melt adhesive compounding is the primary production use. The polymer is melted in a continuous mixer or co-rotating twin-screw extruder, often with a 40:1 L/D barrel, and then combined with tackifier resins, waxes, and stabilizers. Liquid tackifier is preferentially injected downstream of the main feed throat to reduce residence time and prevent localized overheating. Melt temperatures are maintained below 200°C because the acetoxy group can eliminate acetic acid at higher temperatures. Coating is performed by slot die, roll coating, or spray application, with bond performance evaluated on the final adhesive by lap shear under ASTM D1002-10 and T-peel under ASTM D1876-08. The measured bond values are dominated by substrate, coat weight, and tackifier selection rather than by the neat polymer. Production lines running VA430-based hot melts on porous packaging substrates generally report acceptable fiber-tear adhesion only after optimization of wax level and open time; published data for this specific Lotte grade in complete formulations is limited.
At 43 wt% vinyl acetate, the base polymer is more compatible with rosin ester and terpene phenolic tackifiers than lower-VA ethylene-vinyl acetate grades. It also accepts aliphatic and Fischer-Tropsch waxes up to formulation-specific limits before phase separation is observed as surface haze or viscosity instability. The compounded adhesive is characterized by ring-and-ball softening point under ASTM E28-18, and open time and set time are governed by wax type, wax loading, and coat weight. Slot-die coating at 150–180°C is typical when the final melt viscosity permits, but the actual coating temperature must be set from the viscosity curve of the finished adhesive. Rotational parallel-plate rheometry at 0.1 s⁻¹ and 100 s⁻¹ is used to capture shear-thinning; the viscosity difference between these shear rates is a practical measure of pumpability at startup and at normal coating speed. When a hot melt is over-stabilized or run too long, gel particles can appear; inline metal mesh screens are used as a first indication of crosslinked or thermally degraded polymer.
VA430 is also introduced into filled or modified compounds as a soft, polar modifier. In a 50 mm co-rotating twin-screw extruder with 32:1 L/D, a distributive screw configuration is used when the polymer is blended with heat-sensitive additives or high filler loadings. Intense kneading blocks can drive melt temperature above 200°C, causing acid evolution and filler wet-out losses. Compound tensile properties are measured under ISO 527-1:2019, and melt flow is checked under ISO 1133-1:2022 after pelletization. Filler acceptance is evaluated by comparing elongation at break and melt flow at constant filler loading; higher vinyl acetate content improves polar filler wetting more effectively than low-VA grades. Published quantitative filler-loading studies for this exact VS430 designation are limited, so lab-scale protocols should replicate production shear and temperature history.
The table lists the tests and regulatory references applicable to incoming inspection and end-use qualification.
| Standard or regulation | Application in evaluation | Typical report source |
|---|---|---|
| ASTM D1238-20 / ISO 1133-1:2022 | Melt mass-flow rate | Certificate of analysis |
| ASTM D5594-18 | Vinyl acetate content | Certificate of analysis or FTIR |
| ISO 1183-1:2019 | Density | Certificate of analysis |
| ASTM D3418-21 | Melting and crystallization transitions | Incoming inspection or CoA |
| ISO 306:2013 | Vicat softening temperature | Incoming inspection |
| ASTM D2240-15 | Shore hardness | Incoming inspection |
| ASTM D638-14 | Tensile properties | If specified |
| ASTM D1002-10 / ASTM D1876-08 | Adhesive lap shear and T-peel | End-use formulation test |
| FDA 21 CFR 177.1350 | EVA copolymer food-contact eligibility | Supplier compliance statement |
| REACH (EC) No 1907/2006 | Registration and SVHC obligations | EU legal entity documentation |
| RoHS Directive 2011/65/EU | Heavy metal restrictions in articles | Supplier declaration |
Compliance of the base copolymer does not translate automatically to the finished hot melt, since tackifiers, waxes, and stabilizers carry their own regulatory status. Final articles must be tested under the applicable migration or extraction method and supported by a full material declaration.
Thermal stability is the main processing boundary. Vinyl acetate ester linkages degrade by deacetylation when melt temperatures approach approximately 230°C, releasing acetic acid and causing corrosion of melt-contact surfaces. In hot melt production, the melt should be held at the lowest temperature that maintains uniform coating. If residence time exceeds 1 h, nitrogen blanketing or covered melt tanks reduce oxidative discoloration and viscosity drift. Pellets are not usually dried before processing when stored dry, but storage at relative humidity above 60% creates surface moisture risk; drying for 2–4 h at 50–60°C in a desiccant or hot-air dryer removes surface condensation. Direct flame impingement and contact with chlorinated solvents should be avoided; purging from high-VA to low-VA film grades can be performed with a dedicated purge compound or with a film-grade EVA.
Startup on a coating line requires a defined thermal ramp. Heaters are set 10–20°C below target melt temperature until the previous polymer has softened; then the extruder is rotated at low speed to avoid overtorque. Production lines transitioning from a low-VA film grade to VA430 often experience lower backpressure because of the reduced melt viscosity, requiring a gear pump adjustment. Shutdown should leave the system filled with a purge material or the same grade under nitrogen; if the line remains idle above 200°C for more than 30 min, the material can show color shift and acetic acid odor. Incoming lots should be tracked by lot number and melt flow rate; if a lot falls outside the agreed control window, line speed and gear pump stroke must be adjusted before coat weight drifts outside specification.
Compared with Seetec film and molding grades containing 12–28 wt% vinyl acetate, VA430 shows lower crystallinity and therefore lower modulus, lower heat resistance, and higher elongation. Under ASTM D3418-21, the melting endotherm is shifted to lower temperatures and broadened; under ASTM D638-14, representative published ranges for 40–43 wt% vinyl acetate copolymers place tensile strength below 10 MPa, while film grades with 18 wt% vinyl acetate are harder and stronger. Shore A hardness of high-VA EVA commonly falls between 40 and 60; lot-specific data from the CoA replace these literature values. Density measured under ISO 1183-1:2019 is near 0.98–1.00 g/cm³, whereas polyolefin elastomers typically range from 0.86 to 0.88 g/cm³. The ester groups in VA430 contribute to higher lap shear on polar substrates such as polyamide, polyvinyl chloride, paper, and metal when tested under ASTM D1002-10; actual values are substrate-dependent. When seal strength is measured under ASTM F88/F88M-21, high-VA EVA formulations can show greater elongation before failure at low temperatures. Against lower-VA or LLDPE tie resins, the material is intended as a formulated adhesive or modifier rather than as a load-bearing extrusion or injection molding resin.
