| HS Code | 623806 |
| Vinyl Acetate Content | 27.5% |
| Melt Index 190 C 2 16 Kg | 7 g/10min |
| Density | 0.951 g/cm³ |
| Melting Point Dsc | 73°C |
| Crystallization Temperature Dsc | 54°C |
| Vicat Softening Point | 55°C |
| Brittleness Temperature | -76°C |
| Tensile Strength At Break | 21 MPa |
| Elongation At Break | 850% |
| Hardness Shore A | 80 |
| Flexural Modulus | 40 MPa |
| Film Transparency | High |
As an accredited ExxonMobil EVA 7028FL.CC EVA Copolymer Resin,27.5% VA,7 MI,Packaging Film Grade factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ExxonMobil EVA 7028FL.CC copolymer resin, 27.5% VA, 7 MI, supplied as 25 kg bags for packaging film applications. |
| Container Loading (20′ FCL) | 20' FCL of ExxonMobil EVA 7028FL.CC resin: 25 kg bags on pallets, neatly loaded and secured for safe transport. |
| Shipping | ExxonMobil EVA 7028FL.CC is supplied as free-flowing pellets in moisture-resistant bags, palletized and stretch-wrapped for safe transit. Ship in dry, ventilated containers; keep away from heat, direct sunlight, and ignition sources. Suitable for standard truck, rail, or ocean freight with proper load securement and temperature control. |
| Storage | Store ExxonMobil EVA 7028FL.CC resin pellets in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and open flames. Keep original containers tightly sealed to prevent moisture pickup and contamination. Avoid dust accumulation and contact with strong oxidizers. Under proper conditions, shelf life is stable; rotate stock as needed. |
| Shelf Life | Store in a dry, cool area away from direct sunlight and heat. Shelf life is typically 12 months from delivery. |
In frozen-food vertical form-fill-seal operations running 40–60 bags/min, the sealant layer must reach surface fusion at jaw dwell times of 0.3–0.5 s without sticking to the sealing bar or delaminating at frozen storage temperatures. EVA 7028FL.CC, with 27.5% vinyl acetate and a melt flow rate of 7 g/10 min under ISO 1133-1:2022, is run in the inner seal layer of a three-layer blown film, typically against a core of LLDPE and an outer HDPE or LLDPE skin. In converter trials, seal initiation for EVA copolymers in the 25–28% VA range falls below 80°C when measured by ASTM F1921; production jaw setpoints of 110–130°C are still applied because dwell time is too short for full interfacial mixing at lower settings. Formulation for the seal layer includes erucamide slip at 500–1,000 ppm and synthetic silica antiblock at 1,000–2,000 ppm; higher slip loadings above 1,200 ppm cause seal strength loss under ASTM F88/F88M-21 because migrating amide disrupts interfacial polymer chain entanglement. Extrusion uses a barrier screw with L/D 28:1 to 30:1 and compression ratio 2.5:1 to 3.0:1; barrel setpoints are 140–170°C in the feed and compression zones, 175–195°C in the metering zone, and the die is held at 185–200°C. Melt temperatures above 220°C produce acetic acid byproduct through thermal deacetylation, evident as a vinegary odor and as die-lip plate-out after 4–6 h of continuous running. The finished pouch, produced as 200–500 g bags for IQF vegetables, shrimp, and fruit, retains low-temperature puncture resistance because the high VA content depresses crystallinity; brittleness temperature by ASTM D746 is below -60°C. Operational boundary: hot-fill above 85°C or sustained contact with free oils above 50°C is not recommended because the seal layer softens and may creep under head-space pressure.
Cast stretch film lines operating at 300–600 m/min with a 3-layer feedblock use the high-VA EVA as the outer cling layer while the core remains an LLDPE-hexene copolymer. The melt flow rate of 7 g/10 min assists low melt pressure in the outer extruder, but the same flow reduces melt strength; the die-to-chill-roll air gap must be below 12–15 cm to control neck-in and edge thickening. Barrel zones are maintained at 150–180°C in the feed sections and 190–210°C at the adapter and die, because EVA with 27.5% VA degrades above 220°C and generates acetaldehyde and acetic acid. The cling layer usually constitutes 10–15% of total film thickness; at 20 µm machine film total gauge, the EVA skin is 2–3 µm. Polyisobutylene tackifier additions can be reduced to 0–1% by weight in the cling layer, compared with 1.5–3% in conventional LLDPE cling formulations, because the VA groups provide polar surface tack; this reduction limits tackifier migration to stainless steel idler rolls and lowers roll-mark transfer. Cling force is tested under ASTM D5458 after 24 h aging at 23°C; stable cling values above 150 g are typically required for A-grade pallet wrap. The cast film is wound on 76 mm cores and slit to 450 mm or 500 mm rolls for manual and machine stretch application. Operational boundary: warehouse storage above 45°C can increase unwinding noise and blocking because the EVA skin softens; in hot climates, converters specify lower VA or increase silica antiblock in the cling layer to 2,000–3,000 ppm.
Five-layer and seven-layer blown film structures for modified-atmosphere produce packaging combine EVOH oxygen barrier with an EVA sealant that seals through moisture and condensation. The sealant layer is EVA 7028FL.CC at 30–40% of total thickness; the full sequence is LLDPE outer abuse layer, maleated polyolefin tie, EVOH barrier, second tie layer, and EVA sealant. Melt temperature at the sealant extruder is controlled at 185–200°C; die temperature is kept below 205°C to prevent gel formation in the high-VA layer. Blow-up ratio is 2.0:1 to 2.5:1, frost line height is set at 3–5 die diameters, and the nip is run at 40–60°C to minimize film blocking. Antifog concentrates based on glycerol monostearate are dosed at 1–3 wt% into the sealant layer; levels above 3% plate out on sealing jaws and reduce hot tack under ASTM F1921 after 48 h of film aging. The sealant layer meets FDA 21 CFR 177.1350 for EVA copolymers and EU Regulation 10/2011; overall migration must be below 10 mg/dm² and the vinyl acetate monomer specific migration limit is 12 mg/kg food. Hot tack and seal strength are verified with ASTM F1921 and ASTM F88/F88M-21, with leak testing by ASTM F2096 for gross leaks. Terminal products include washed leafy greens, broccoli florets, and fresh-cut fruit packs in 150–500 g pillow pouches. Operational boundary: lidding film structures with EVA sealant are not suited to retort or pasteurization above 90°C because the seal softens and oxygen barrier layer may delaminate under internal pressure.
Medical device pouch sealants expose the resin to different failure modes than food packaging because seal integrity must survive terminal sterilization and distribution. EVA 7028FL.CC is blended with LDPE at 20–50% by weight in the sealant layer of coextruded films for chevron pouches and header bags; LDPE above 40% reduces softness and sealability, so the blend ratio is adjusted against ASTM F88/F88M-21 seal strength on uncoated Tyvek and paper. The film is produced on a cleanroom blown film line with the sealant extruder barrel set at 160–185°C and the die at 190–200°C; melt temperature above 215°C creates acetic acid that can contaminate cleanroom air-handling filters and raise particulate counts. Seal strength after 0.5 s, 110–120°C jaw temperature is typically checked at 200–300 mm/min peel speed per ASTM F88/F88M-21, and porous packaging is tested for dye penetration per ASTM F1929-20. The resin is compatible with ethylene oxide sterilization at 50–55°C and 40–70% RH; steam autoclave cycles at 121°C are not suitable because the high-VA sealant softens and may creep or produce peel strength drift beyond the device manufacturer’s acceptance limits. Gamma radiation at 25–40 kGy causes discoloration and crosslinking; published data for this specific grade under gamma is limited, and converters must validate each lot when radiation-sterilized devices are packed. Terminal applications include pouches for syringes, IV tubing sets, and procedure kits. The sealant layer is not intended for contact with alcohols, chlorhexidine, or lipid-based lubricants because these agents can migrate through the film and alter seal stability.
| ISO 11607-1:2019 | Packaging for terminally sterilized medical devices | Seal strength and integrity validated per device family |
| ASTM F88/F88M-21 | Seal strength test | 200–300 mm/min peel rate, 25.4 mm specimen width |
| ASTM F1929-20 | Dye penetration for porous packaging | 0.5% toluidine blue, 5 min contact |
| EU 10/2011 | Plastic food-contact migration | Overall migration 10 mg/dm²; vinyl acetate SML 12 mg/kg |
When EVA 7028FL.CC is evaluated as a tie layer between nylon and polyethylene in extrusion lamination, the absence of maleic anhydride functionality limits chemical coupling. Adhesion to nylon depends on polar interactions from the 27.5% vinyl acetate groups and on mechanical interlocking; converters usually restrict the structure to low-demand laminations or blend the EVA with a maleated polyolefin at 10–20% to raise interfacial peel strength. The critical process conflict is thermal: nylon requires high melt temperature to wet the substrate, but EVA degradation accelerates above 230°C. Extrusion coating barrel zones are therefore set at 180–225°C, the die at 225–230°C, and line speed is held at 150–300 m/min with a die gap of 0.8–1.0 mm. Coatweight is controlled at 15–25 g/m²; adhesion to aluminum foil or corona-treated PET is measured by T-peel under ASTM D1876, with converters monitoring peel strength after 24 h conditioning at 23°C and 50% RH. Hindered phenolic antioxidant is added at 200–500 ppm to limit oxidative gel formation during extended runs; the die manifold should be hard-chrome plated because acetic acid released at the upper temperature boundary increases corrosion risk on unprotected steel. The food-contact status of the finished laminate is supported by FDA 21 CFR 177.1350 and EU 10/2011 when the EVA layer is separated from food by an appropriate functional barrier. Terminal structures include paper/PE/EVA/foil laminates for snack food, seasoning, and dry beverage pouches. Operational boundary: this resin is not a substitution for reactive tie resins in retort nylon/PE structures, where anhydride-modified adhesive layers are required to prevent tunneling and delamination after 121°C thermal processing.
EVA 7028FL.CC forms the adhesive skin of a coextruded protective film applied to pre-painted steel, aluminum composite panels, and PVC window profiles. The backing layer is LDPE or polypropylene, and the EVA skin is 5–15% of total film thickness; total film gauge is typically 40–80 µm. Peel adhesion to stainless steel under ASTM D3330/D3330M Method A after 48 h at 23°C is controlled between 0.5–2.0 N/25 mm for temporary protection; values above 2.0 N/25 mm create difficult removal and increase residue risk on curved profiles. Adhesion builds over time because the high VA content allows chain segment mobility and progressive wetting of the substrate; storage above 40°C accelerates this build and can produce adhesive transfer, while UV exposure embrittles the EVA layer and increases peel strength beyond specification. The film is cast on a chill roll line with die temperature 190–210°C, chill roll temperature 15–25°C, and air gap 10–15 cm. Formulation uses erucamide slip at 300–700 ppm and silica antiblock at 500–1,500 ppm; no phthalate plasticizers or chlorinated paraffins are added. Compliance is verified against REACH SVHC restrictions and RoHS Directive 2011/65/EU for heavy metal limits. Terminal products include protective film for aluminum composite panels, pre-painted garage door steel, and window profile extrusion lines. Operational boundary: the film should not be specified for exterior weathering beyond 6 months or for application temperatures below 5°C, where the high-VA skin loses tack and may lift from the substrate.
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ExxonMobil EVA 7028FL.CC is an ethylene-vinyl acetate copolymer resin positioned as a packaging film sealant and tie-layer material, designated by a nominal vinyl acetate content of 27.5 wt% and a nominal melt index of 7 g/10 min when determined at 190 °C under a 2.16 kg load according to ASTM D1238 or ISO 1133-1:2022. The grade-name structure encodes the two most important specification boundaries: the “28” series corresponds to the high vinyl acetate level, while the “7” series corresponds to the mid-range melt-flow segment used in film converting. In coextruded packaging, the resin functions mainly as a low-temperature sealant layer rather than as a load-bearing core. The high vinyl acetate content depresses polyethylene crystallinity, lowers the crystalline melting point, broadens the heat-seal initiation window, and improves adhesion to polar substrates. The 7 g/10 min melt index places the material in a lower-viscosity class than many blown film EVA sealants, which reduces extrusion torque but requires deliberate bubble-cooling control. Because the grade is supplied as a packaging film resin, food-contact compliance must be confirmed on the finished structure under FDA 21 CFR 177.1350 and Commission Regulation (EU) No 10/2011 as amended, not assumed from the resin alone.
In typical three-layer or five-layer blown film constructions, the resin is applied as the inner sealant layer against a polyethylene-based core or an outer skin of linear low-density polyethylene or metallocene polyethylene. The sealant-layer weight fraction is normally set by seal-strength, drop-impact, tear, and migration testing rather than by a single supplier recommendation. Because the high vinyl acetate fraction reduces melting point and melt viscosity relative to unmodified polyethylene, coextrusion processors commonly run the sealant layer at a lower die temperature than the structural layers to prevent interfacial viscosity mismatch and layer distortion. Relevant finished-film test anchors include ASTM F88 for seal strength, ASTM F1921 for hot-tack, ASTM D1709 or ISO 7765-1 for impact resistance, and ASTM D1003 for haze.
Published data for this specific grade configuration is limited outside the supplier technical datasheet; the following statements are therefore based on the well-established behavior of EVA copolymers in the 27–28 wt% vinyl acetate class. At this vinyl acetate level, the copolymer chain loses much of the long-range crystallinity characteristic of low-density polyethylene. Differential scanning calorimetry by ASTM D3418 or ISO 11357-3 typically shows a crystalline melting peak in the range of 70–75 °C for such copolymers, substantially below that of LDPE or lower-vinyl acetate EVA grades. This reduced crystalline order is the primary reason the resin exhibits low-temperature flexibility, improved clarity, and lower heat-seal initiation than EVA copolymers containing 12–18 wt% vinyl acetate.
The increase in vinyl acetate content also shifts density into the class range of approximately 0.94–0.95 g/cm³ at 23 °C when measured by ASTM D792 or ISO 1183-1. The lower crystallinity reduces stiffness and yield stress while increasing elongation and impact toughness at freezer temperatures. These effects are measurable on finished film by tensile testing under ASTM D882 or ISO 527-3, using specimens conditioned at 23 °C ± 2 °C and 50 % ± 5 % relative humidity for at least 40 h before testing.
The sealing advantage of the 27.5 wt% vinyl acetate content is not simply a lower melting point. Reduced crystallinity also lowers the temperature at which the film surfaces fuse under pressure, which is critical in high-speed form-fill-seal lines where dwell time is short. Heat-seal initiation must nevertheless be measured on the final laminated or coextruded structure because seal bar temperature, pressure, dwell time, and film gauge alter the result. The resin provides a moderate hot-tack and seal-through-contamination window relative to lower-VA EVA grades; however, for applications requiring aggressive seal-through-contamination performance, ionomer sealants are generally specified instead.
Adhesion to aluminum foil, paper, and polar inks is improved by the vinyl acetate functional group. For polyester or EVOH substrates, the resin does not replace a true tie-layer chemistry; maleic anhydride-grafted polyolefins are typically inserted between the EVA sealant and high-barrier layers when structural adhesion is required. The high vinyl acetate content also reduces the corona treatment burden relative to unmodified polyethylene because the resin surface exhibits higher polarity.
The melt index of 7 g/10 min under 190 °C and 2.16 kg identifies a lower-viscosity EVA compared with 2–3 g/10 min blown film grades. On a single-screw blown film line with an L/D of 24:1 to 30:1, the grade generally produces lower motor load and lower melt pressure at equivalent throughput, which can support higher output on screw-limited lines. The same lower viscosity reduces bubble stability in blow-up ratios above approximately 2.5:1 to 3.0:1, requiring chilled air and careful frost-line-height control. Typical die gaps for high-VA EVA blown film fall in the range of 1.5–2.5 mm, with actual settings dependent on die diameter, blow-up ratio, and frost-line requirements.
Barrel temperature profiles for high-VA EVA are normally set lower than for LDPE. A representative profile for a 24:1 L/D single-screw extruder begins at 140–150 °C in the feed zone, increases to 160–180 °C in the compression zone, and reaches 190–205 °C at the metering zone and die. Melt temperature at the die should be kept below 220 °C during normal operation. Sustained melt temperatures above approximately 230 °C can initiate deacetylation of the vinyl acetate units, releasing acetic acid. The resulting acidic volatiles can corrode downstream metal surfaces and contribute to die-lip plate-out. Stainless steel melt-contact components are preferred, and copper-based alloys should be avoided in areas exposed to melt vapors.
In cast film and extrusion coating, the 7 g/10 min melt index supports drawdown to thin gauges more readily than lower-MI EVA grades. The grade can be placed against the substrate to exploit its polar adhesion while a polyethylene layer provides melt strength and down-gauge economics. For extrusion coating of paper or aluminum foil, the high vinyl acetate content improves adhesion but limits heat resistance; the resulting laminate should not be specified for hot-fill above approximately 60 °C without creep testing of the seal area and coating interface. Because EVA does not provide high oxygen or moisture barrier, the resin should not be selected as a barrier layer. Barrier performance must be supplied by EVOH, polyamide, aluminum foil, or metallized layers in the structure.
High-VA EVA films exhibit greater blocking tendency than lower-VA EVA or LDPE. Converter-added antiblock and slip packages are generally required to control coefficient of friction. Surface slip should be verified at the final film level by ASTM D1894 because migration of slip additives is time- and temperature-dependent. Processing with highly alkaline or amine-based additive masterbatches should be evaluated before production; such additives can accelerate deacetylation and promote plate-out at elevated melt temperatures. At shutdown, a low-VA polyethylene purge is recommended to reduce acidic residue in the barrel, die, and downstream cooling equipment.
Pre-drying is generally not required for EVA copolymers stored in closed original packaging under ambient relative humidity at or below 60 %. If surface moisture is observed due to improper storage, drying at 60 °C for 4–6 h may be applied. Prolonged storage above 35 °C should be avoided because high-VA pellets can soften and agglomerate under pallet load.
Relative to an EVA copolymer with 18 wt% vinyl acetate, the 27.5 wt% vinyl acetate content in 7028FL.CC lowers the crystalline melting point, reduces stiffness, improves low-temperature impact resistance, and increases adhesion to polar substrates. The trade-off is a greater tendency to block, lower maximum service temperature, and higher gas permeability. Relative to a 33 wt% vinyl acetate EVA, 7028FL.CC offers a more moderate balance of adhesion and handling, with less blocking and better thermal stability during film processing. The following directional table compares classes rather than specific commercial grades.
| Processing or End-Use Variable | EVA Class with 18 wt% VA, 2 MI | EVA Class with 27.5 wt% VA, 7 MI | EVA Class with 33 wt% VA, 25 MI |
|---|---|---|---|
| Crystalline melting point | Highest | Intermediate | Lowest |
| Low-temperature flexibility | Lower | Improved | Highest |
| Heat-seal initiation temperature | Highest | Reduced | Lowest |
| Adhesion to aluminum foil and paper | Lower | Improved | Highest |
| Blocking tendency | Lower | Moderate | Highest |
| Melt viscosity at 190 °C | Higher | Moderate | Lower |
| Blown film bubble stability | Highest | Moderate | Lowest |
| Extrusion coating drawdown | Lower | Moderate | Highest |
The table is a qualitative ranking only. Actual commercial grades vary by antioxidant package, slip and antiblock content, and supplier-specific molecular architecture. For a given end use, the selection between a 2 MI, 7 MI, or 25 MI EVA should be made on the converting line where bubble stability, screw torque, and drawdown are measured directly. In general, lower-MI EVA grades are favored for thick blown film and large bubble diameter stability, while higher-MI grades are favored for extrusion coating and high-output cast film where low viscosity is more valuable than melt strength.
When a packaging line is limited by seal-bar temperature or seal dwell time, the 27.5 wt% vinyl acetate content provides a lower seal-initiation window than EVA copolymers with 18 wt% VA. That lower seal-initiation window can reduce energy input and increase line speed in form-fill-seal operations. However, the same low melting point limits use in retort, hot-fill, or boil-in-bag structures where the seal area may be exposed to temperatures above 60 °C. In those structures, a higher-temperature sealant such as polypropylene or a specialty tie-layer system is standard.
In frozen food packaging, the reduced crystallinity of 7028FL.CC improves flexibility at subzero temperatures and reduces brittle fracture in drop tests. The frozen food application still requires validation by ASTM D1709 or ISO 7765-1 at the target service temperature, because orientation, gauge, and coextruded layer structure affect impact failure. The resin is not intended for outdoor long-term UV exposure unless a suitable UV stabilizer package is included in the film formulation.
Resin-level data alone are insufficient for food-contact or end-market certification. The finished film or laminate must be tested under the conditions of intended use, including time, temperature, food simulant, and layer structure. The matrix below lists the standard designations most commonly used to verify resin properties and finished packaging compliance. Inclusion in the matrix does not constitute a supplier certification.
| Verification Domain | Reference Method or Regulation | Role in 7028FL.CC Evaluation |
|---|---|---|
| Melt mass-flow rate | ASTM D1238, ISO 1133-1:2022 | Confirms 7 g/10 min at 190 °C, 2.16 kg |
| Vinyl acetate content | Supplier specification, FTIR or titration | Confirms nominal 27.5 wt% vinyl acetate |
| Density | ASTM D792, ISO 1183-1 | Verifies class density of 0.94–0.95 g/cm³ |
| Melting peak | ASTM D3418, ISO 11357-3 | Confirms high-VA melting class for sealant film |
| Film tensile properties | ASTM D882, ISO 527-3 | Measures stiffness, elongation, and toughness of finished film |
| Seal strength and hot tack | ASTM F88, ASTM F1921 | Validates sealant performance in form-fill-seal packaging |
| Food-contact polymer | FDA 21 CFR 177.1350 | Regulates EVA copolymers for food contact in the United States |
| EU food-contact compliance | (EU) No 10/2011 as amended | Requires migration testing of the finished article |
| Chemical registration | REACH (EC) No 1907/2006 | Applies to placement on the EU market |
| Electrical and electronic packaging | RoHS Directive 2011/65/EU | Relevant only if packaging is within scope for EEE articles |
The vinyl acetate monomer specific migration limit under the EU framework should be checked against the current consolidated regulation; the value is commonly cited as 12 mg/kg, but formulators must use the regulatory text applicable to the end-use food simulant. For United States food-contact use, the grade may be used only insofar as the finished EVA copolymer meets the compositional and extractive limitations of 21 CFR 177.1350. Converters should request the grade-specific certificate of analysis, product stewardship bulletin, and safety data sheet before commercial production.
