| HS Code | 399324 |
| Vinyl Acetate Content | 28.0 wt% |
| Melt Index | 150 g/10 min (190°C/2.16 kg) |
| Density | 0.945 g/cm³ |
| Melting Point | 68 °C |
| Ring Ball Softening Point | 90 °C |
| Glass Transition Temperature | -30 °C |
| Tensile Strength | 8 MPa |
| Elongation At Break | 800% |
| Hardness | 85 Shore A |
| Flexural Modulus | 30 MPa |
| Brookfield Viscosity | 5000 cP (at 140°C) |
| Chemical Family | Ethylene Vinyl Acetate Copolymer |
As an accredited ELEVATE EF437 Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ELEVATE EF437 Ethylene Vinyl Acetate Copolymer: free-flowing pellets supplied in 25 kg multiwall paper bags. |
| Container Loading (20′ FCL) | 20′ FCL loading: ELEVATE EF437 EVA copolymer in palletized bags, stowed securely to prevent moisture, shifting, and damage. |
| Shipping | ELEVATE EF437 Ethylene Vinyl Acetate Copolymer ships as solid pellets in 25 kg multiwall paper bags, palletized and stretch-wrapped for protection. It is non-hazardous for transport, though keep dry and store away from excessive heat. Standard truck or container shipping is suitable, with proper labeling for material identification. |
| Storage | Store ELEVATE EF437 Ethylene Vinyl Acetate Copolymer in a cool, dry, well-ventilated area away from heat, open flames, and direct sunlight. Keep containers tightly closed to prevent moisture contamination. Avoid storage temperatures above 40°C to prevent pellet agglomeration or deformation. Ensure area is clean and free of ignition sources. |
| Shelf Life | Shelf life is typically 2 years from date of manufacture when stored unopened in a cool, dry place. |
Coextruded polyethylene seal layers formulated with ELEVATE EF437 are processed on 45–75 mm single-screw extruders with 24:1 L/D barrier screws and melt temperatures held between 180°C and 220°C; the EVA phase is blended with LLDPE at 15–35 wt% to lower seal initiation temperature and broaden the hot-tack plateau. On production cast-film lines, die temperatures are maintained at 180–230°C, chill-roll temperatures at 15–30°C, and seal performance is tested per ASTM F1921-18 to confirm hot-tack values of 1.5–3.0 N/cm at 95°C and per ASTM D882-18 for seal elongation at break. Compliance for food-contact seal layers is evaluated under FDA 21 CFR 177.1350 for EVA copolymers and EU Regulation 10/2011; migration testing is carried out under EN 1186-1:2002 when fatty-food simulants are specified. The downstream converting process involves coextrusion or monolayer extrusion of a seal layer onto biaxially oriented polyester or polyamide substrates, followed by form-fill-seal packaging. End products include lidding films, frozen food bags, stand-up pouches, and flow-wrap snack packaging.
In hot-melt packaging adhesive production, ELEVATE EF437 is incorporated at 15–30 wt% with 30–50 wt% hydrogenated hydrocarbon or rosin ester tackifier, 15–25 wt% Fischer-Tropsch or microcrystalline wax, and 0.2–0.5 phr hindered phenolic antioxidant; the melt is compounded in jacketed sigma-blade or twin-screw extruders at 130–170°C and applied through slot-coating nozzles or roller coaters at 150–180°C with viscosity held at 500–1,500 mPa·s at 160°C per ASTM D3236-88(2021). Adhesive bond strength is measured by ASTM D1876-08(2015) T-peel on corrugated kraft stock, with fiber-tear failure typically observed above 3.0 N/cm. Indirect food-contact compliance is assessed under FDA 21 CFR 175.105 for adhesives, and the compound is monitored for thermal stability by ASTM D4499-07(2021) to ensure viscosity does not drift more than ±10% over 24 h at 160°C. The downstream application process is case and carton closing, bookbinding, and end-of-line packaging. End products include corrugated boxes, paperboard cartons, multi-wall bags, and perfect-bound softcover books.
Halogen-free flame-retardant jacket compounds use ELEVATE EF437 at 20–45 wt% of the polymer phase because the polar vinyl acetate segments wet high-loading metal hydroxide fillers and preserve elongation at break. A production formulation comprises 100 phr EF437, 120–180 phr precipitated aluminum trihydrate, 10–25 phr magnesium dihydroxide, 0.5–1.5 phr vinyl silane or amino-functional silane coupling agent, 0.5–1.5 phr zinc borate or zinc stannate synergist, and 0.1–0.3 phr antioxidant. Mixing is performed on a co-rotating twin-screw extruder with 40:1 L/D, segmented kneading blocks, and barrel zones limited to 120–170°C; screw-tip melt temperature must remain below 175°C because aluminum trihydrate begins endothermic decomposition at 180–220°C and releases water that can hydrolyze the EVA, forming acetic acid. Residence time is kept under 60 s at full speed to avoid filler degradation and viscosity surge. The jacket compound is tested against IEC 60332-1-2 for flame spread, IEC 60754-2 for pH and conductivity of combustion gases, IEC 61034-2 for smoke density, and IEC 60811-501 for tensile strength and elongation before aging; typical elongation at break exceeds 150%. Downstream production involves extrusion onto copper or aluminum conductors through a crosshead die at 150–180°C with screw compression ratio 2.5:1. End products include low-voltage building wire, control cable jackets, solar cable sheaths, and marine cable insulation.
| Assessment parameter | Test standard | Typical acceptance criterion |
|---|---|---|
| Tensile elongation before aging | IEC 60811-501 | ≥150% |
| Flame propagation resistance | IEC 60332-1-2 | Pass/exposure |
| Smoke density | IEC 61034-2 | Light transmittance ≥60% |
| Combustion gas pH | IEC 60754-2 | pH ≥4.3; conductivity ≤10 μS/mm |
Crosslinked EVA foam for footwear soles is compounded with ELEVATE EF437 at 100 phr as the base polymer; dicumyl peroxide at 0.6–1.0 phr active, azodicarbonamide at 2.5–4.0 phr, zinc oxide at 1.0–2.0 phr, and stearic acid at 0.5–1.0 phr. The production process uses an internal mixer or Banbury mixer with a drop temperature of 110–130°C, followed by a two-roll mill set at 90–110°C for sheet formation and preform cutting. Because peroxide half-life at 180°C is approximately 1 min and azodicarbonamide gas evolution accelerates above 205°C, the compression molding cycle is constrained to 170–180°C and 8–12 min at 150–300 t clamp force; foam density is controlled at 0.12–0.20 g/cm³. Shore A hardness is measured by ASTM D2240-15 or ISO 868:2003 with a 15 s delay; tensile strength and elongation are determined by ISO 527-2:2012 on die-cut plaques. Abrasion loss is measured by DIN 53516 with typical values below 250 mm³ for midsole foam. Regulatory conformity is verified under REACH Regulation (EC) No 1907/2006 Annex XVII entry 50 for polycyclic aromatic hydrocarbons, and finished footwear components intended for global export are screened under ZEK 01.4-08 PAH specification. Downstream forming processes include compression molding, injection foam molding with 200–400 t clamp force, and split-sheet thermoforming. End products include midsoles, insoles, sockliners, flip-flop soles, and soft foam sheets for orthopedic footwear.
As a carrier resin for additive masterbatches, ELEVATE EF437 is let down at 20–40 wt% in polyolefin finished compounds; typical masterbatch formulations contain 40–70 wt% EF437, 30–60 phr pigment or chemical foaming agent, and 0.1–0.3 phr process stabilizer, compounded on a 40:1 L/D twin-screw kneader at 140–180°C with strand pelletizing and dried to ≤0.05% moisture; carrier selection is reconciled with REACH Regulation (EC) No 1907/2006 Article 33 SVHC communication when the additive package triggers notification, and articles supplied to electrical and electronic equipment are evaluated under EU RoHS Directive 2011/65/EU. Downstream use includes film extrusion and injection molding of closures, containers, and agricultural film.
EF437 is formulated into hot-melt films for garment side seams and technical textile lamination by extruding 15–30 wt% EVA with 20–40 wt% hydrogenated C5/C9 tackifier, 0–10 wt% polyolefin elastomer, and 0.1–0.3 phr antioxidant through a slot die at 100–140°C, followed by chill-roll casting at 10–20°C and slitting to 400–1,200 mm width. The resulting film is activated in lamination presses at 100–130°C under 3–5 bar for 5–10 s; melt viscosity at 120°C is measured by ASTM D3236-88(2021) and controlled between 100 Pa·s and 300 Pa·s. Film blocking during storage is evaluated by ASTM D3354-15 at 40°C and 50% RH, with acceptable peel force below 0.5 N/cm. The film complies with FDA 21 CFR 177.1350 when used in textile laminates not contacting food, and REACH Regulation (EC) No 1907/2006 Annex XVII restrictions apply for consumer goods; for apparel export, OEKO-TEX Standard 100 certification is performed on the finished laminate rather than the raw film. Downstream process steps include reel-to-reel web lamination, die cutting, and high-frequency welding. End products include bonded garment hem tapes, automotive seat upholstery tapes, nonwoven diaper side panels, and mattress ticking seam tapes.
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The product designated ELEVATE EF437 is a random ethylene vinyl acetate copolymer supplied in pellet form. The grade identifier EF437 denotes a nominal 18 wt% vinyl acetate comonomer content and a nominal melt mass-flow rate of 2.5 g/10 min when determined at 190 °C with a 2.16 kg piston load in accordance with ISO 1133-1:2022 or ASTM D1238. The resin is unpigmented, contains no intentionally added slip or antiblock masterbatch, and is stabilized for general conversion temperatures below 230 °C. Its comonomer distribution is random rather than blocky, which reduces polyethylene crystallinity and shifts the thermal and rheological profile relative to low-density polyethylene homopolymer. The product is positioned for injection moulding, profile extrusion, and compounding where softness, flex-crack resistance, and polar filler compatibility are required; published data for the specific configuration of EF437 in food-contact end-use conditions is limited and should be verified against the supplier’s current regulatory certificate.
The following values are reported as typical from manufacturer technical literature for the unfilled resin. Lot-to-lot variation and sample conditioning influence these values, and the certificate of analysis for each production batch takes precedence. The test methods listed are the current or commonly cited versions at the time of publication.
| Property | Test Method | Published Typical Value |
|---|---|---|
| Vinyl acetate content | ASTM D5594 / internal Fourier-transform infrared calibration | 17.5–18.5 wt% |
| Melt mass-flow rate | ISO 1133-1:2022, 190 °C, 2.16 kg | 2.2–2.8 g/10 min |
| Density | ASTM D1505, 23 °C | 0.938–0.942 g/cm³ |
| Shore A hardness, 15 s | ASTM D2240 | 88–90 |
| Tensile strength at break | ASTM D638-14, Type IV specimen, 500 mm/min | 18–22 MPa |
| Elongation at break | ASTM D638-14, same condition | 700–750 % |
| Vicat softening point | ISO 306, 10 N, 50 K/h | 65–70 °C |
| Peak melting temperature | ISO 11357-3:2018 differential scanning calorimetry | 82–86 °C |
The vinyl acetate comonomer inserts carbonyl side groups along the ethylene backbone. These pendant acetate groups reduce crystallite thickness and overall crystalline fraction, which is measurable as a lower peak melting point of 82–86 °C by ISO 11357-3. The reduction in crystalline order lowers modulus and increases elongation at break relative to lower-VA ethylene copolymers. Under ASTM D638-14, EF437 typically exhibits tensile strength at break of 18–22 MPa and elongation at break of 700–750 %. At 18 wt% vinyl acetate, crystallinity falls to an estimated 15–25 %, which is lower than that of a 9–12 wt% VA EVA and higher than that of a 28 wt% VA EVA. The Shore A hardness window of 88–90 reflects this intermediate crystalline order. The acetate groups also increase melt polarity, which improves dispersion of polar fillers and adhesion to polar substrates in coextruded or laminated structures compared with ethylene homopolymers. The viscosity curve obtained by ISO 11443 capillary rheometry at 190 °C shows shear-thinning behavior typical of random EVA; the 2.5 g/10 min melt mass-flow rate provides sufficient flow for injection moulding while retaining melt strength for profile extrusion and blow moulding.
The principal processing conflict for ELEVATE EF437 is deacetylation. Above approximately 230 °C, and more rapidly above 250 °C, the acetate side groups undergo thermal elimination with release of acetic acid. The reaction rate is not only temperature-dependent but also residence-time-dependent. In a typical 24:1 L/D single-screw extruder maintaining a melt temperature of 200 °C, residence times below 5 min produce negligible degradation; at 240 °C, the same residence time can generate sufficient acetic acid to cause surface haze and measurable melt-flow drift. Vent position, barrel metallurgy, and raw material moisture become critical. Vacuum venting at -0.08 MPa or lower on the screw metering section is required when the melt temperature exceeds 210 °C. Barrels and screws should be of nitrided steel or equivalent corrosion-resistant construction because acetic acid will attack unprotected carbon steel. Avoid formulation additives that are acid-sensitive or that accelerate deacetylation; specifically, amine-based stabilizers or basic fillers should be avoided unless the neutralization reaction is intended and controlled. Predrying at 55–65 °C for 2–4 h is recommended if bulk moisture exceeds 0.05 wt%, particularly in humid conditions above 60 % relative humidity.
On a multi-cavity injection moulding line with a reciprocating screw and hydraulic clamp force of 800–1200 kN, typical barrel setpoints for EF437 begin at 140–160 °C in the feed zone, 180–195 °C in the compression zone, and 195–210 °C in the metering zone. Nozzle temperature should not exceed 210 °C. Mold temperatures are commonly held at 30–45 °C for footwear soles and technical profiles. A screw compression ratio between 2.5:1 and 3.0:1 is preferred because high compression generates unnecessary shear heating. For filled compounds, a co-rotating twin-screw extruder with 40:1–44:1 L/D ratio and atmospheric or vacuum venting is used, with melt temperature controlled below 220 °C. In masterbatch production, EF437 may carry 30–50 wt% calcium carbonate or talc at 180–210 °C, provided the filler is dry. For chemical blowing agent systems used in midsoles, azodicarbonamide loadings of 0.5–1.5 wt% are typical with melt temperatures below 210 °C to avoid premature gas evolution.
When EF437 is substituted for a 12 wt% VA EVA of equivalent melt index, the compound moves to a lower Shore A hardness by approximately 4–6 points and a lower Vicat softening point by 8–12 °C. The same substitution raises elongation at break and improves stress-crack resistance in flexed parts. This shift is measured by ASTM D638-14 tensile elongation and ASTM D1693 environmental stress-crack resistance. Conversely, when EF437 replaces a 28 wt% VA EVA, the compound gains higher heat resistance and blocking resistance but sacrifices some low-temperature flexibility and polar adhesion. Peel adhesion to polar substrates, evaluated by ASTM D1876, is typically lower for EF437 than for higher-VA EVA; published quantitative values for this specific configuration are limited. Against a high-melt-flow EVA of 25 g/10 min, EF437 provides higher melt strength and longer hang time in extrusion but produces shorter spiral-flow length at fixed injection pressure. The selection difference is therefore not a simple upgrade but a trade-off between flow length, melt strength, heat resistance, and polar adhesion.
The unfilled resin is supplied with typical food-contact statements based on 21 CFR 177.1520 for olefin polymers when the supplier’s current conditions of use are met. For European applications, compliance with EU Regulation 10/2011 and its migration limits depends on the specific food-contact configuration and thickness; published data for this specific configuration is limited, so end-use verification is required. Electrical and electronic applications are typically assessed against IEC 62321 test methods for RoHS-restricted substances; the as-supplied unfilled resin is not formulated with lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, or polybrominated diphenyl ethers. REACH compliance is verified through supplier declaration; the current SVHC candidate list should be checked per lot. Biological evaluation for medical or pharmaceutical use is not covered by the standard resin certificate.
Bagged resin should be stored at 10–30 °C and 50 % relative humidity or below. If cold storage is used, condensation must be prevented by sealed original packaging and equilibration before opening. Open containers should be consumed within 24 h when ambient relative humidity exceeds 60 % because surface moisture can create splay and increase deacetylation during subsequent melt processing.
