| HS Code | 133101 |
| Product Name | LG EVA 28005 EVA Copolymer Resin |
| Grade | General Film Grade |
| Va Content | 28 % |
| Melt Index | 5 g/10 min |
| Density | 0.950 g/cm³ |
| Melting Point | 73 °C |
| Vicat Softening Point | 50 °C |
| Tensile Strength At Break | 20 MPa |
| Elongation At Break | 750 % |
| Flexural Modulus | 30 MPa |
| Hardness Shore A | 85 |
| Brittleness Temperature | -70 °C |
As an accredited LG EVA 28005 EVA Copolymer Resin,28% VA,5 MI,General Film Grade factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged as 25 kg net polyethylene bags, palletized and shrink-wrapped for safe transport and storage. Quantity: 25 kg per bag. |
| Container Loading (20′ FCL) | 20′ FCL loaded with palletized 25 kg bags of LG EVA 28005 resin, secured and ventilated for safe transport. |
| Shipping | LG EVA 28005 ships as 25 kg polyethylene-lined bags on pallets, shrink-wrapped for stability. Use dry, ventilated containers or hopper trucks. Keep away from moisture, direct sunlight, and temperatures above 50°C. Handle with standard forklift equipment; product is non-hazardous but requires clean, contaminant-free transport. |
| Storage | Store in a cool, dry, well-ventilated area away from direct sunlight, heat sources, and open flames. Keep original containers tightly sealed to prevent moisture absorption and contamination. Ideal temperature below 30°C. Avoid stacking excessively to prevent deformation. While not hazardous, maintain good housekeeping to minimize dust accumulation. |
| Shelf Life | Shelf life is typically 2 years from production when stored in a cool, dry place away from sunlight and moisture. |
In three-layer blown-film structures used for multi-season greenhouse cladding, EVA 28005 is fed into the middle layer at 15–35 wt% of the layer polymer fraction because a neat 28% vinyl acetate melt at 5 g/10 min (ISO 1133-1:2022, 190 °C/2.16 kg) produces higher specific energy input and lower bubble stability on standard polyolefin lines than LDPE-rich formulations. The EVA-bearing layer is extruded through a coextrusion die with a die gap of 1.6–2.4 mm, blow-up ratio maintained at 2.2:1–2.8:1, and melt temperature limited to 175–190 °C; residence above 200 °C accelerates vinyl acetate cleavage, raising free acetic acid concentration and causing die-lip plate-out. At ambient RH above 60%, pellet predrying at 55–60 °C for 4 h is imposed to prevent hydrolysis-induced bubble defects in the middle layer. Finished film under EN 13206:2017 is tested for tensile properties under ISO 527-3, tear resistance under ISO 6383-2, and luminous transmittance/haze under ASTM D1003; the resin is subject to REACH registration, and if repurposed for direct silage contact, the converter must verify EU Regulation 10/2011 overall migration and specific migration limits rather than assume agricultural-grade compliance transfers. Terminal forms include multi-season greenhouse covers, low-tunnel cladding, and silage clamp covers in widths of 6–16 m; the primary conversion constraint is not filler dispersion but bubble instability at increasing EVA content, so layer distribution and frost-line height control constitute the main process levers.
High-VA EVA lowers the heat-seal initiation point relative to LDPE because the vinyl acetate comonomer disrupts chain packing, but that same disruption increases the blocking tendency of wound film and forces the converter to add antiblocking concentrates that can degrade seal clarity. In cast-film converting, EVA 28005 is dry-blended into the seal layer at 20–40 wt% with an ethylene-α-olefin plastomer of lower VA content; when seal-through-contamination is required for lidding or frozen food structures, the processor coextrudes a neat EVA skin layer at 8–15 µm within a multilayer build. The cast film line is operated with a chill roll temperature of 18–25 °C, melt temperature of 185–210 °C, and die-to-nip distance of 100–200 mm to limit neck-in and odor. Direct food-contact compliance is evaluated under FDA 21 CFR 177.1350 for ethylene-vinyl acetate copolymers and under EU Regulation 10/2011 Annex I; overall migration testing follows EN 1186-1, and specific migration of vinyl acetate is checked against the Union list. Terminal film structures include lidding films for polyolefin and polystyrene trays, frozen food pouches, and sealant layers in laminated stand-up pouches; the dominant converting failure is not melt fracture but stringiness of the sealant web at high EVA content, controlled by draw ratio and die geometry rather than by temperature reduction alone.
Encapsulant sheet extrusion for photovoltaic modules consumes EVA 28005 only after the pellet is precompounded with crosslinking and adhesion promoters, because virgin EVA without a grafted silane system shows poor glass adhesion after damp-heat aging. The compound is cast on a single-screw extruder with a melt temperature between 85 °C and 110 °C, kept below the peroxide 1-min half-life temperature to avoid premature scorch; sheet gauge is held at 0.40–0.60 mm with gauge variation below ±7%. The base resin is charged at 100 phr, with peroxide curative added at 0.5–1.2 phr, methacryloxypropyltrimethoxysilane at 0.3–0.8 phr, and stabilizer packages at 0.1–0.5 phr. Lamination is carried out in a vacuum laminator at 145–150 °C for 10–16 min; gel content after crosslinking is evaluated by solvent extraction per IEC 62788-1-1 or ASTM D2765 method A, with conventional target values between 70% and 90%. Module-level compliance is anchored to IEC 61215-1:2021 and IEC 61730-1, with damp-heat exposure at 85 °C/85% RH for 1000–2000 h as the standard degradation gate. Terminal products are crystalline silicon module laminates, glass-glass and glass-backsheet structures, and building-integrated photovoltaic elements. Plant-level published data for this exact general film grade in photovoltaic lamination is limited; ionic purity, volume resistivity, and gel-particle content must be verified against the encapsulant specification before use in production modules, and compounded pellets should be stored below 30 °C to prevent pre-crosslinking.
Crosslinked footwear foam compounds use EVA 28005 as the dominant resin because the 28% VA content reduces crystallite melting temperature and permits higher filler and blowing agent dispersion without the torque spike encountered with low-VA polyolefins of equivalent 5 g/10 min melt index. In batch compounding, the resin is charged at 100 phr into an internal mixer at 105–115 °C, with azodicarbonamide blowing agent at 2.5–4.5 phr, dicumyl peroxide crosslinking agent at 0.7–1.2 phr, calcium carbonate filler at 5–20 phr, and zinc oxide/stearic acid coactivators at 1.0–3.5 phr. The mixed batch is transferred to a two-roll mill, calendered into sheet, and press-cured at 160–175 °C for 8–15 min; if the cure cycle drifts into the azodicarbonamide decomposition range of 200–215 °C while DCP exotherm accelerates, split sheets and non-uniform closed-cell morphology result. Compliance for the compound includes EU REACH Regulation (EC) No 1907/2006, RoHS Directive 2011/65/EU for heavy metal limits, and California Proposition 65 for certain blowing agent decomposition residues; finished footwear components are tested for hardness under ISO 868, tear strength under ISO 34-1, and density under ISO 845. Terminal products include compression-molded midsoles, injection-molded sandal footbeds, and profile-extruded cushioning strips. The main process conflict resides in balancing crosslinking kinetics with gas evolution to produce a closed-cell structure; at 28% VA, the lower crystalline melting plateau narrows the stable processing window by approximately 5–8 °C relative to lower-VA EVA.
Because the 5 g/10 min melt index of EVA 28005 raises application viscosity, hot melt compounding with the resin is confined to high-viscosity, high-green-strength segments rather than low-viscosity sprayable formulations. The resin is formulated at 25–40 wt% of the adhesive, with tackifying resin at 35–50 wt%, wax diluent at 10–30 wt%, and antioxidant at 0.1–0.5 phr; the exact ratio depends on ring-and-ball softening point and open-time requirements. Compounding is performed in a jacketed sigma-blade mixer at 150–180 °C, and application is maintained at 170–190 °C; prolonged exposure above 200 °C darkens the melt and liberates acetic acid, which can corrode applicator tips and reduce adhesion to metalized substrates. For indirect food-contact applications, the adhesive is evaluated under FDA 21 CFR 175.105 and EU Regulation 10/2011 for packaging adhesives if it is not separated from food by a functional barrier; RoHS Directive 2011/65/EU applies to electronics-related bonding in appliance assembly. Terminal uses include wood edgebanding, bookbinding, profile wrapping, and furniture lamination; the process limitation is not tackifier compatibility but the viscosity increase caused by high-VA EVA at low applicator temperatures, which restricts its use to gear-pump or piston-dispense units rather than spray systems.
When pigment and antifogging additive concentrates require polar wetting in polyolefin film structures, EVA 28005 functions as a film-grade carrier resin; the 28% VA content wets polar additives while the ethylene backbone maintains letdown compatibility with LDPE, LLDPE, and EVA-based films. The carrier is loaded at 40–70 wt% of the masterbatch, with the active pigment or processing additive fraction at 30–60 wt%; for low-threshold film additives such as slip or antifogging concentrates, the EVA carrier is often cut into letdown film resin at 2–5 wt% at the converter. Compounding is performed on a co-rotating twin-screw extruder with an L/D ratio of 40:1, barrel temperatures from 120 °C to 180 °C, and vacuum devolatilization to remove moisture and oligomeric volatiles; strand pelletizing rather than underwater pelletizing is preferred because EVA copolymers with 28% VA exhibit moderate water absorption that can create surface roughness. The carrier should not be compounded with strongly basic amine-containing pigments at high temperature because vinyl acetate repeat units undergo alkali-catalyzed hydrolysis. Compliance for masterbatch carriers is governed by REACH Regulation (EC) No 1907/2006 and, for colorants, by RoHS Directive 2011/65/EU when the final film enters electronics packaging streams; food-contact masterbatches must comply with EU Regulation 10/2011 and FDA 21 CFR 177.1350 only if the carrier is formulated within the permitted EVA composition. Terminal products include color masterbatches for agricultural and packaging films, antifogging concentrates for greenhouse cladding, and processing aid masterbatches for cast film and blown film lines. The main process conflict is not dispersion energy but the sensitivity of the carrier to thermal history; repeated extrusion cycles above 190 °C can build gel specks that appear as fish-eyes in thin film, so single-pass compounding with minimum residence time is the standard operating boundary.
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LG EVA 28005 is an ethylene-vinyl acetate copolymer resin supplied as a general film grade with a nominal vinyl acetate content of 28% by mass and a melt index of 5 g/10 min when determined at 190 °C under a 2.16 kg load in accordance with ISO 1133-1 or ASTM D1238. The grade is positioned for blown-film and cast-film processes in which the converter requires lower crystalline melting, increased low-temperature flexibility, improved heat-seal initiation, and higher optical clarity than a conventional low-vinyl-acetate EVA. The 28% comonomer content is high enough to suppress polyethylene crystallinity, while the 5 g/10 min melt index is low enough to retain bubble stability in high-blow-up-ratio film lines.
Published class data for ethylene-vinyl acetate copolymers with approximately 28% vinyl acetate indicate a density of 0.945–0.955 g/cm³ by ASTM D1505 or ISO 1183-1, a differential scanning calorimetry melting peak commonly in the 70–78 °C range at 10 K/min, and a Vicat softening temperature in the 55–65 °C range under ASTM D1525. These are polymer-class reference values, not guaranteed lot specifications. The resin reduces polyethylene crystallinity sufficiently to produce a broad melting endotherm and low-temperature flexibility suitable for freezer film structures, but exact tensile strength, elongation, dart impact, and haze must be obtained from a supplier certificate of analysis and measured on finished film.
| Parameter | Method | LG EVA 28005 profile | Lower-VA EVA profile | High-MI EVA profile |
|---|---|---|---|---|
| Vinyl acetate content | ASTM D5594 | 28% | 18% | 28% |
| Melt index | ISO 1133-1 | 5 g/10 min | 5 g/10 min | 25 g/10 min |
| Density | ASTM D1505 | 0.950 g/cm³ | 0.940 g/cm³ | 0.950 g/cm³ |
| Relative crystallinity | DSC at 10 K/min | Lower than 18% VA | Higher | Similar to 5 g/10 min version |
| Low-temperature flexibility | Brittleness by ASTM D746 | Improved | Moderate | Similar |
| Melt strength | Extensional rheometry | Higher than 25 g/10 min | Similar | Lower |
| Typical process fit | — | Blown and cast film | General packaging film | Injection molding, compounding, thin casting |
Compared with an 18% vinyl acetate EVA of equivalent melt index, the 28% vinyl acetate fraction introduces a larger amorphous phase and reduces flexural modulus. The polar acetate side groups increase the resin’s surface energy and alter adhesion to inks, coatings, and polar substrates. Film formed from the 28% VA grade generally exhibits lower seal initiation temperature and better retention of flexibility at freezer temperatures. Heat-seal initiation is commonly 10–15 °C lower than an 18% VA grade of similar melt index. The trade-off is lower modulus, greater blocking tendency, and reduced stiffness, which can limit machinability in high-speed form-fill-seal lines unless antiblock and slip additives are incorporated.
Against a high-melt-index EVA with the same 28% vinyl acetate content, the 5 g/10 min melt index provides higher melt tension and lower neck-in. This benefits blown-film bubble stability and wide-web cast-film edge control. A 25 g/10 min grade may be preferred for injection molding or thin-wall compounding because it fills complex flow paths at lower pressure, but it does not provide the same gauge uniformity in thick blown film.
Rheologically, a melt index of 5 g/10 min is a single low-shear point. Two EVA grades with identical melt index can differ in molecular weight distribution, long-chain branching, shear thinning, and extensional viscosity. A capillary rheometry sweep from 100 s⁻¹ to 1000 s⁻¹ at 190 °C is a more reliable comparison than melt index alone. In general, the 5 g/10 min grade exhibits higher zero-shear viscosity and higher melt tension than a 25 g/10 min grade of the same vinyl acetate content, but the difference narrows at high shear.
On production-scale blown-film lines equipped with a 25:1 L/D barrier screw and a 0.8–1.5 mm die gap, the resin is commonly started at barrel temperatures from 160 °C to 190 °C and die temperatures from 180 °C to 210 °C. A blow-up ratio of 2.0:1 to 3.0:1 and a frost-line height of 3 to 5 die diameters are typical initial settings. Increasing the blow-up ratio improves transverse-direction tear strength but reduces machine-direction tensile strength.
On cast-film lines, a melt temperature of 210–230 °C, a die gap of 0.5–1.0 mm, a chill-roll temperature of 15–25 °C, and an air gap of 10–20 mm are common starting conditions. Higher melt temperatures reduce haze but accelerate gel formation; line speed and chill-roll surface finish determine film surface roughness and release behavior.
Base LG EVA 28005 is supplied without a tailored additive package. Antiblock, slip, UV-stabilizer, and processing-aid masterbatches are selected by the converter and control blocking, haze, coefficient of friction, and weatherability. The resin should be evaluated before combining with amine-containing colorants or stabilizers, because acetic acid by-products at high temperature can react with basic moieties and cause color shifts.
Thermal exposure above 230 °C accelerates acetic acid elimination and oxidative chain scission in EVA copolymers with vinyl acetate content above 25%. The released acetic acid creates a corrosive vapor that attacks unplated carbon steel die lips, air rings, and downstream handling equipment. Continuous film lines processing LG EVA 28005 therefore use chromium-plated or stainless steel die surfaces and maintain nitrogen or low-humidity cooling air to reduce oxidative yellowing. If screen-pack pressure rises above 25–30 MPa, the screen is changed; a pressure increase at constant screw speed indicates gel accumulation.
Batch-to-batch variance observed on production lines commonly appears as surging, die-lip buildup, and variable film haze. These defects are minimized by controlling melt temperature below 220 °C, maintaining a stable hopper feed, and using a melt pump to isolate die pressure from extruder screw output. During shutdown, the barrel is purged with low-density polyethylene before cooling to displace residual EVA and reduce black speck formation on restart. Published grade-specific degradation kinetic data for LG EVA 28005 are limited, but the behavior described is representative of EVA copolymers in this vinyl acetate range.
Commercial film structures using LG EVA 28005 include greenhouse film, extrusion lamination, surface-protection film, and high-clarity packaging. Extrusion lamination may use melt temperatures of 220–240 °C and a chill-roll temperature of 15–25 °C; adhesion to aluminum foil and polyester is typically higher than with an 18% VA EVA, but bond values must be verified by peel testing such as ASTM F904.
Food-contact status for film made from LG EVA 28005 is formulation-dependent and must be confirmed on the finished article. The resin’s 28% vinyl acetate content may place it outside the comonomer scope of certain general clearances, and converters should not rely solely on the resin grade designation.
| Instrument | Scope | Typical obligation | Finished-article verification |
|---|---|---|---|
| Regulation (EU) No 10/2011 | Plastic food-contact materials | Overall migration limit 10 mg/dm²; monomer-specific migration limit for vinyl acetate from Annex I | Migration testing in food simulants |
| FDA 21 CFR 177.1350 | EVA copolymers for food contact | Comonomer and extractive limits defined in the section; higher-VA grades may require an FCN | Supplier certification plus end-use extraction |
| REACH Regulation (EC) 1907/2006 | SVHC and restriction lists | No restricted substance above applicable concentration limits | Article declaration and chemical analysis |
| RoHS Directive 2011/65/EU | Hazardous substances in electrical/electronic components | Lead, mercury, cadmium, hexavalent chromium, PBB, and PBDE thresholds | XRF or destructive chemical analysis |
Continuous service above 70 °C can produce creep and loss of seal strength; the resin is therefore not recommended for retort, autoclave, or high-temperature sterilization applications. Solvent resistance is lower than polyethylene in contact with polar solvents because the 28% vinyl acetate content increases swelling; finished-film testing is required.
Storage in dry conditions at or below 45 °C is recommended. EVA is not highly hygroscopic, but surface condensation on pellets can produce bubbles and film defects. When exposure to relative humidity above 60% is suspected, pre-drying at 55 °C for 2 to 4 hours is used before extrusion.
Differences from other products are most visible in heat-seal and low-temperature performance. A lower-VA EVA of the same melt index gives higher stiffness and lower blocking but seals at a higher temperature; a higher-VA EVA gives lower melting and higher softness but reduces melt strength. The 5 g/10 min melt index differentiates this grade from injection-molding and compounding resins and keeps its film extrusion window suitable for both blown and cast equipment.
