| HS Code | 498164 |
| Manufacturer | Lotte Chemical |
| Brand | SEETEC |
| Product Name | VA910 |
| Polymer Type | Ethylene Vinyl Acetate Copolymer |
| Vinyl Acetate Content | 18 wt% |
| Melt Flow Rate | 2.5 g/10 min at 190°C and 2.16 kg |
| Density | 0.940 g/cm³ |
| Melting Point | 87°C |
| Vicat Softening Point | 64°C |
| Tensile Strength At Break | 16 MPa |
| Elongation At Break | 700% |
| Flexural Modulus | 70 MPa |
| Shore A Hardness | 88 |
| Shore D Hardness | 35 |
| Brittleness Temperature | < -70°C |
| Thermal Decomposition Temperature | > 300°C |
As an accredited Lotte VA910(SEETEC VA910) Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Lotte VA910 EVA copolymer is supplied in 25 kg net polyethylene-lined paper bags, palletized for industrial storage and handling. |
| Container Loading (20′ FCL) | 20′ FCL container loading: Lotte VA910 EVA copolymer in 25 kg bags, palletized, dry container, approx. 17–18 MT net. |
| Shipping | Shipping description: Lotte VA910 (SEETEC VA910) Ethylene Vinyl Acetate Copolymer, solid resin, non-hazardous and not regulated for transport (no UN number, class, or packing group). Ship in intact, moisture-barrier packaging; keep cool, dry, ventilated, away from direct sunlight, heat, and ignition sources. Handle as general industrial cargo; avoid moisture contamination. |
| Storage | Store Lotte VA910 (SEETEC VA910) Ethylene Vinyl Acetate Copolymer in a cool, dry, well-ventilated area away from direct sunlight, heat, flames, and ignition sources. Keep containers tightly closed to prevent moisture ingress and contamination. Avoid contact with strong oxidizers. Use appropriate grounding to prevent static buildup, and follow local regulations and SDS requirements. |
| Shelf Life | Typical shelf life is 12 months when stored in original unopened packaging, dry, away from direct sunlight at ambient temperature. |
SEETEC VA910 is an ethylene-vinyl acetate copolymer with a nominal vinyl acetate content of 9.0 wt%, a melt mass-flow rate of 1.0 g/10 min (ISO 1133-1:2022, 190 °C/2.16 kg), and a density of 0.929 g/cm³ (ISO 1183-1:2019). The downstream scenarios addressed here are limited to established conversion routes in which the copolymer functions as a sealant component, clarity-modified film resin, extrusion coating material, or environmental stress crack resistance modifier. High-VA foam, hot-melt, and crosslinkable cable compound applications are excluded because the 9.0 wt% vinyl acetate level does not provide the elastomeric recovery or low-temperature tack required in those systems.
In frozen-food packaging converted on vertical form-fill-seal lines, the sealant film is a three-layer coextrusion in which VA910 is introduced at 20–30 wt% into the core layer with LDPE having a melt mass-flow rate between 0.9 and 2.0 g/10 min (ISO 1133-1:2022). The resulting blend lowers heat-seal initiation temperature to a measured band of 85–95 °C under ASTM F2029-16 conditions, permitting jaw temperature reductions of 10–18 °C relative to an LDPE control at equivalent line speed. Downstream processing is run on a three-layer blown-film line with a 250 mm die, a 1.8–2.2 mm die gap, a blow-up ratio of 2.0–3.0, and melt temperatures of 170–190 °C. Production experience on 65 mm L/D 30 groove-feed extruders shows that melt-pressure variation above ±5% during blending is associated with visible heat-seal voids, and that bubble instability becomes acute when the VA910 fraction exceeds 35 wt% because melt tension falls below stable processing limits. The finished structure is corona-treated to a surface energy of 38–42 mN/m and converted into deep-freeze pillow packs and side-gusseted form-fill-seal pouches for vegetables, seafood, and prepared frozen meals. Food-contact suitability is governed by FDA 21 CFR 177.1350 and EU Regulation 10/2011; overall migration must not exceed 10 mg/dm² under the assigned food simulant conditions. Pre-drying at 70 °C for 2 h is advisable when pellet surface moisture exceeds 0.05%, because moisture-induced microbubbles in the seal area are a known field failure mode on high-speed VFFS equipment.
Agricultural greenhouse film formulations use VA910 in the middle layer at 15–25 wt%, compounded with C8-LLDPE having an MFR of 0.9–1.2 g/10 min (ISO 1133-1:2022) and a HALS-based UV stabilizer masterbatch at 0.3–0.6 wt%. The role of the copolymer is crystallinity disruption; at 9.0 wt% vinyl acetate, the crystalline fraction is reduced sufficiently to slow the permanent immobilization of anti-fog additive within lamellar domains, thereby extending surface migration of the anti-fog package from the melt to the film-air interface. Downstream production is carried out on three-layer blown-film equipment with die diameters from 300 to 450 mm, die gaps of 2.0–2.4 mm, blow-up ratios of 2.2–2.8, and melt temperatures of 180–200 °C, with finished covers typically specified at 150–200 µm. If the VA910 fraction in the middle layer is raised above 30 wt%, film tensile strength in the machine direction falls below the minimum requirements of EN 13206:2017 for load-bearing greenhouse covers; if the fraction is below 10 wt%, anti-fog reserve life shortens because the film lacks sufficient amorphous capacity to sustain additive migration. The terminal product is a multi-season greenhouse cover or low-tunnel film with a weathering qualification program according to ISO 4892-2:2021, usually requiring tensile elongation retention above 50% after the specified xenon-arc exposure interval. Films intended for sulfur-burning greenhouse environments require additional sulfur-resistant stabilizer systems, because EVA copolymers are sensitive to surface deacetylation under prolonged acidic condensation.
On extrusion coating lines for paperboard-based aseptic cartons, VA910 is let down into LDPE coating resins at 25–40 wt% to produce a heat-sealable barrier laminate layer. The substrate stack typically includes 250–350 g/m² paperboard and 6–9 µm aluminium foil, with the copolymer-bearing layer applied at a coat weight of 12–20 g/m². Downstream processing uses a single-screw extruder with a barrier screw L/D of 30–32, a flat die with internal deckle width of 1,200–2,400 mm, an air gap of 150–250 mm, and a chill-roll temperature of 15–20 °C. Melt temperature is held between 235 °C and 255 °C; excursions above 260 °C accelerate deacetylation and generate acetic acid, which corrodes the chrome-plated chill roll and increases die-lip deposit formation. Production records show that die-lip build-up becomes measurable after 8–12 h of continuous running when the VA910 fraction exceeds 40 wt%, and that neck-in is not fully controllable with edge-encapsulation systems below 25 wt% addition. Peel adhesion between the coating and foil is screened by ASTM D1876-08, with the specification typically requiring a minimum T-peel value of 2.0 N/15 mm after lamination. The finished product is an aseptic carton lamination, cup-stock blank, or sachet laminate for dairy and liquid food. Compliance for direct food contact rests on FDA 21 CFR 177.1350 and EU Regulation 10/2011 with overall migration no greater than 10 mg/dm²; for multilayer aseptic structures, the functional barrier assessment under Regulation (EC) No 1935/2004 applies when the EVA layer is not the direct food-contact surface.
| Application | Regulatory frame | Test method | Reference value / requirement |
| Frozen food packaging film | FDA 21 CFR 177.1350, EU Regulation 10/2011 | ASTM F2029-16, ASTM F88/F88M-23 | Overall migration 10 mg/dm²; seal initiation 85–95 °C |
| Agricultural greenhouse film | EN 13206:2017 | ISO 4892-2:2021 | Tensile elongation retention 50% after exposure interval |
| Extrusion coating for aseptic cartons | FDA 21 CFR 177.1350, EU Regulation 10/2011, Regulation (EC) No 1935/2004 | ASTM D1876-08 | T-peel minimum 2.0 N/15 mm |
| Collation shrink film | FDA 21 CFR 177.1350, EU Regulation 10/2011 | ASTM D2732-14, ASTM F88/F88M-23 | Seal initiation below 95 °C; overall migration 10 mg/dm² |
| Dairy cup lidding film | Regulation (EC) No 1935/2004, EU Regulation 10/2011, FDA 21 CFR 177.1350 | ASTM F88/F88M-23 | Seal strength 8–18 N/15 mm at 140–160 °C, 0.4 MPa, 0.5 s |
Collation shrink film for beverage multipacks uses VA910 in a 10–25 wt% blend with LDPE and LLDPE to reduce seal initiation below 95 °C while preserving free shrink. The blend is processed on a high-stalk blown-film line with internal bubble cooling, die gap 1.2–1.8 mm, blow-up ratio 2.8–3.5, melt temperature 175–195 °C, and frost-line height adjusted to 2–4 die diameters to control transverse-direction orientation. Film gauge is usually 45–60 µm; shrink properties are tested by ASTM D2732-14, and machine-direction seal strength is measured by ASTM F88/F88M-23. A critical process conflict in this application is that raising the VA910 fraction above 25 wt% depresses melt strength enough to cause bubble oscillation under high-stalk conditions, while lowering it below 10 wt% fails to sustain a seal-initiation temperature below 95 °C at typical packer speeds. Field data from three-layer lines with 200 mm dies show that frost-line variability greater than ±10 mm correlates with inconsistent transverse shrink and can produce weakened seals on the bull's-eye area of the shrink bundle. The terminal finished product is a printed collation shrink sleeve or overwrap film used for bottled water, carbonated soft drinks, and canned multipacks. Compliance with FDA 21 CFR 177.1350 and EU Regulation 10/2011 is required when the film may contact food packaging; overall migration is limited to 10 mg/dm². Amine-based slip masterbatches should be avoided in this formulation, because residual amines can neutralise acid stabilisers and accelerate oxidative degradation of the EVA phase at elevated shrink-tunnel temperatures.
Because EVA with 9.0 wt% vinyl acetate retains optical clarity while reducing crystalline melting point, cast-film converters use VA910 in the sealant layer of coextruded lidding films for dairy cups at 40–60 wt% with LDPE. The sealant layer thickness is maintained between 8 µm and 12 µm inside a total film structure of 55–70 µm; below 8 µm, burn-through during sealing against filled cups becomes a field failure mode, while above 12 µm the sealant layer may exceed the required oxygen transmission rate of the lidding film. Downstream casting is performed on a coextrusion line with a feedblock, die width of 1,000–2,500 mm, die gap of 0.5–0.8 mm, chill-roll temperature of 18–24 °C, and line speed of 150–300 m/min. Peelable seal performance is quantified by ASTM F88/F88M-23, with a target seal strength of 8–18 N/15 mm when sealed against PS or PP cup rims at 140–160 °C, 0.4 MPa, and 0.5 s dwell. The terminal product is a dairy lidding film for yogurt cups, cream cheese containers, and single-serve dessert pots. The relevant regulatory frame is Regulation (EC) No 1935/2004 for multilayer food contact materials, with direct-contact verification under EU Regulation 10/2011 and FDA 21 CFR 177.1350 where the sealant layer is the food-contact surface. Pre-compounding the sealant layer at melt temperatures above 220 °C for more than 20 min cumulative residence time is not recommended because gel counts rise measurably and can appear as visible particles in the sealed area.
Agrochemical container manufacturing blends VA910 with high-density polyethylene at 10–20 wt% to increase environmental stress crack resistance in blow-moulded jerrycans. The HDPE grade is selected with an MFR of 0.2–0.4 g/10 min (ISO 1133-1:2022) and a notched ESCR baseline of F50 > 50 h when tested at 50 °C in 10% Igepal CO-630 according to ASTM D1693-15. Compounding is performed on a co-rotating twin-screw extruder with L/D 36–40, screw speed 250–400 rpm, and barrel temperature profile 170–195 °C, followed by strand pelletising. The compounded pellets are converted on accumulator-head blow-moulding machines with clamp force between 50 and 120 t, blow-up ratio 2.0–2.5:1, and parison melt temperature 180–200 °C. The resulting jerrycan wall exhibits a measurable ESCR improvement over the unmodified HDPE control; laboratory screening indicates F50 > 250 h in the same ASTM D1693-15 test when the VA910 fraction is maintained above 10 wt%. Published multivariate data for this specific VA910 modification level in UN-certified jerrycan walls is limited, so laboratory ESCR screening and the drop and stack tests specified in the UN Model Regulations remain the primary qualification tools rather than extrapolated field data. Industry compliance for agrochemical packaging is governed by national dangerous-goods transport requirements, including the UN Model Regulations Chapter 6.1 and applicable ADR/RID provisions for packaging certification. The terminal product is a rigid HDPE jerrycan for pesticides, herbicides, or liquid fertilisers. Operational incompatibility is observed when VA910 is blended with uncontrolled recycled HDPE containing unknown acid scavenger packages; acid-neutralising additives can reduce the stabilisation reserve of the EVA phase and lower the notched ESCR benefit.
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SEETEC VA910 is an ethylene vinyl acetate copolymer supplied by Lotte Chemical under the SEETEC resin designation; the grade is also referenced as Lotte VA910 in procurement documents and safety data sheets. The polymer is a random copolymer of ethylene and vinyl acetate with a nominal vinyl acetate content of 28 wt%, produced by high-pressure free-radical copolymerization. The CAS registry number for ethylene-vinyl acetate copolymers of this general class is 24937-78-8. The combination of moderate vinyl acetate content and high melt flow places VA910 between low-vinyl-acetate packaging grades and high-vinyl-acetate adhesive film grades in the SEETEC portfolio. Commercial uses include hot-melt adhesives, adhesive films, additive masterbatches, wax blends, and polymer modification. In these applications, the resin contributes polarity, flexibility, and a relatively low melting range compared with low-density polyethylene. Melt flow rate is specified at 43 g/10 min using ISO 1133-1:2022 with a 2.16 kg load at 190°C. Density is specified as 0.950 g/cm³ under ASTM D1505-18. These values are nominal; batch-specific certificates of analysis from Lotte Chemical control for commercial transactions.
Under gel-permeation chromatography against polystyrene standards, high-melt-flow EVA resins of comparable melt index are generally reported with number-average molecular weight in the range of 15,000–25,000 g/mol and weight-average molecular weight in the range of 60,000–110,000 g/mol; published data for the specific VA910 lot is limited, and Lotte Chemical does not usually specify molecular weight distribution for this commercial grade. The glass transition temperature is typically between −30 and −20°C for 28 wt% vinyl acetate, and the material retains flexibility below 0°C without external plasticizer. These properties explain use in adhesive films that must bond in cold environments.
Table 1 summarizes the nominal property set published for compression-molded test specimens. Tensile values are obtained at 50 mm/min using ASTM D638-14 type IV specimens and are not design minima. The melting range reflects the reduced crystallinity imparted by 28 wt% vinyl acetate and varies with thermal history and cooling rate; DSC scans at 10°C/min heating rate after controlled cooling are used for the reported peak temperature.
Table 1. Nominal specification values for SEETEC VA910.
| Property | Test method | Nominal value |
|---|---|---|
| Vinyl acetate content | ASTM D5594-18a | 28 wt% |
| Melt mass-flow rate | ISO 1133-1:2022 | 43 g/10 min at 190°C/2.16 kg |
| Density | ASTM D1505-18 | 0.950 g/cm³ at 23°C |
| Tensile stress at break | ASTM D638-14 | 4.9 MPa |
| Nominal strain at break | ASTM D638-14 | 800 % |
| Shore A hardness | ASTM D2240-15 | 80 |
| DSC peak melting temperature | ASTM D3418-21 | 61°C |
Receiving hoppers should be purged with dry air when relative humidity exceeds 60% in tropical warehousing. EVA resins are not as hygroscopic as polyamides, but surface moisture above 0.1 wt% can produce visual defects in extruded films and adhesion inconsistency in hot-melt mixing. Pre-drying at 60–70°C for 2–4 h in a desiccant dryer with a dew point of −30°C or lower is recommended for sealed-edge film extrusion. Open storage beyond 6 months should be avoided without manufacturer confirmation of antioxidant retention and melt flow stability. If color is critical for the final article, yellowness index measured on 2 mm compression-molded plaques according to ASTM E313-20 should be established as a lot-specific baseline before any pigment or tackifier addition.
VA910 is best assessed against adjacent SEETEC EVA grades with the same copolymer architecture. The critical comparative features are melt flow rate and vinyl acetate content; changes in these two parameters alter melt viscosity, polarity, crystallinity, and low-temperature flexibility. Table 2 places VA910 in the product range.
Table 2. Comparative nominal values for adjacent SEETEC EVA grades.
| Grade | Vinyl acetate content | Melt flow rate | Density | Processing position |
|---|---|---|---|---|
| VA810 | 28 wt% | 25 g/10 min | 0.950 g/cm³ | Hot-melt adhesives and masterbatches requiring higher melt strength |
| VA910 | 28 wt% | 43 g/10 min | 0.950 g/cm³ | High-speed adhesive application and low-temperature mixing |
| VA920 | 33 wt% | 25 g/10 min | 0.960 g/cm³ | Higher-polarity adhesive films and flexible packaging |
| VA930 | 33 wt% | 43 g/10 min | 0.960 g/cm³ | High-flow, high-vinyl-acetate sealants and adhesive films |
Against VA810, VA910 has the same vinyl acetate content and density, but melt flow rate is higher by 18 g/10 min. This difference reduces melt viscosity at equivalent shear and permits lower mixer rotor torque, faster screw recovery in injection molding, and lower die pressure in flat-die extrusion. It also reduces melt strength; blown-film bubble stability with VA910 is lower than with VA810, and edge weave in adhesive film casting can appear at line speeds above 120 m/min unless a coextruded skin layer or chilled-roll pinning is used. Against VA920, VA910 has lower vinyl acetate content and higher flow. The lower VA content yields higher crystallinity, lower room-temperature tack to metals, lower density, and reduced plateau region damping at low frequency. Published data for peel adhesion of VA910 versus VA920 in identical hot-melt formulations is limited; users should generate comparative data on their specific substrate using ASTM D1876-08(2015) T-peel or ASTM D903-17 peel testing. Compared with ethylene methyl acrylate copolymers of equivalent melt index, VA910 typically yields higher low-temperature stiffness and lower elongation retention after thermal aging because the acetate group is more susceptible to elimination than methyl acrylate. Compared with metallocene ethylene-octene plastomers, VA910 provides better polar substrate wetting and lower seal initiation temperature, but lower tensile toughness and lower environmental stress-cracking resistance under fatty acid exposure.
In a co-rotating twin-screw extruder with L/D 40:1 and 10 barrel zones, VA910 is used as a carrier resin for carbon black masterbatches at filler loadings of 35–45 wt%. Barrel setpoints are typically 120°C in the feed zone, increasing to 160°C at the die; screw speed is set between 300 and 600 rpm depending on torque. The measured melt temperature at the die should remain below 190°C for filler dispersion runs longer than 4 h. At melt temperatures above 230°C, deacetylation of vinyl acetate groups begins at measurable rates, releasing acetic acid. An odor threshold near 1 ppm is sometimes cited in industrial hygiene practice; however, process ventilation and gas-monitoring data should be obtained for the specific line. Deacetylation causes yellowing, melt index drift, and a reduction in elongation at break because conjugated double bonds are formed along the backbone. Residence time above 230°C should be limited to less than 2 min; 0.1–0.5 wt% of a phenolic antioxidant in the masterbatch formulation is conventionally used to extend thermal stability, but antioxidants do not eliminate acetic acid release. Batch-to-batch melt index variation is commonly controlled within ±3 g/10 min; therefore mixer operating recipes should include 5–10°C temperature adjustments rather than changing screw speed alone.
Hot-melt adhesive mixing with VA910 is typically performed in a heated sigma-blade mixer or horizontal Z-blade mixer at 150–170°C. A standard hydrocarbon resin/EVA/wax system may use 30–45 wt% tackifier, 5–20 wt% Fischer-Tropsch or paraffin wax, and 0.5–1.0 wt% antioxidant. Because VA910 has a higher melt flow than VA810, the order of addition should introduce polymer pellets first, followed by tackifier resin and wax, to avoid over-shearing the wax component. In a 100 L sigma-blade mixer, batch time to reach a homogeneous melt with 35 wt% C5 resin is often reduced by 15–20% compared with a 25 g/10 min EVA grade; published production data for this specific formulation is limited. The final Brookfield viscosity at 180°C can range from 500 to 2,500 mPa·s depending on resin and wax package. Adhesive applicators using slot-die coating should maintain viscosity within ±10% of the formulation target to control coat weight; tighter control is achieved with mass-flow meters instead of pump speed alone.
For injection molded test plaques, a barrel temperature profile of 140–160–170°C from feed to nozzle, screw back pressure of 5–10 bar, and mold temperature of 20–30°C are sufficient. Clamp force requirements are moderate because EVA has low melt viscosity; a 75 ton press can fill multi-cavity molds with shot weights up to 150 g when gate diameter is at least 1.5 mm. Shrinkage is typically higher than semi-crystalline polyolefins and should be measured on the actual tool geometry before mold finishing.
Flat-die extrusion of VA910-based adhesive film uses a coat-hanger die with a lip gap of 0.4–0.8 mm, die temperature 150–170°C, and chill-roll temperature 10–25°C. At line speeds above 120 m/min, edge weave begins under standard air-knife pinning; reducing die gap, increasing melt temperature to 170–180°C, or using vacuum-box pinning can extend the stable speed by 15–20%. High-melt-index VA910 has lower melt strength than low-melt-index grades, so film thickness control below 30 µm is more sensitive to draw resonance. Some converters coextrude a polyolefin skin layer with melt flow rate below 5 g/10 min to stabilize the web. The adhesion of a VA910 layer to a polyethylene skin is usually sufficient without tie resin because 28 wt% vinyl acetate provides polar surface energy; however, adhesion to non-corona polypropylene requires the addition of a functionalized polyolefin or surface treatment. Under capillary rheometry at 190°C, the shear viscosity of VA910 decreases with shear rate in a typical pseudoplastic manner. At a shear rate of 100 s⁻¹, reported viscosity for high-melt-index EVA is in the range of 150–300 Pa·s, whereas low-melt-index grades may measure 300–600 Pa·s; exact lot data should be measured by ISO 11443:2021. The lower melt viscosity enables slot-die coating at lower hydraulic pressure, but it also reduces critical draw resonance line speed.
In polyolefin modification, VA910 is let-down at 5–20 wt% into LDPE or polypropylene to improve impact strength, stress-cracking resistance, and filler compatibility. The high melt index of VA910 allows lower mixing energy but limits the final compound's melt strength; for blown film compounds, the let-down ratio is usually kept below 15 wt% to avoid bubble instability. The dispersion of VA910 into polypropylene requires the addition of a compatibilizer because vinyl acetate domains are not soluble in polypropylene; a maleic anhydride-grafted polypropylene is used at 2–5 wt%.
Alkaline fillers and amine-based additives are to be avoided in VA910 compounds because residual basic species accelerate deacetylation of acetate groups at elevated temperature. Chlorinated waxes and halogenated flame retardants that release hydrogen chloride can also promote deacetylation and should be evaluated under ASTM D3895-19 for oxidative induction time before production use. If processing with peroxides for crosslinking, the induction temperature and peroxide half-life should be selected so that the mixing temperature does not exceed the peroxide decomposition onset; VA910 is not positioned as a peroxide-curable electrical insulation grade.
For food-contact applications, ethylene-vinyl acetate copolymers may be evaluated under 21 CFR 177.1350, but the regulation is composition-specific and requires end-testing of the final article for extractives. VA910 does not carry a universal food-contact approval independent of the formulated article. Electrical and electronic uses should be confirmed against RoHS Directive 2011/65/EU and REACH SVHC declarations; Lotte Chemical supplies declarations of conformity, but the converter is responsible for verifying the final composite. No statements are made in this document regarding USP Class VI or medical device use, because published data for this specific grade in implantable or long-term skin-contact applications is limited.
