| HS Code | 677658 |
| Vinyl Acetate Content | 18 wt% |
| Melt Flow Rate 190 C 2 16 Kg | 60 g/10 min |
| Density | 0.940 g/cm³ |
| Melting Point Dsc | 85 °C |
| Vicat Softening Point | 58 °C |
| Hardness Shore A | 90 |
| Tensile Strength At Break | 12 MPa |
| Elongation At Break | 800% |
| Tear Strength | 30 kN/m |
| Compression Set 50 23 C 24h | 40% |
| Rebound Resilience | 55% |
| Flexural Modulus | 30 MPa |
As an accredited Greenflex ML 60 BCA EVA Copolymer Resin,Bio-Circular Attributed,High Elasticity Foam Grade factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Packaged as 25 kg polyethylene bags of resin pellets on shrink-wrapped pallets; also available in 600 kg octabins. Bio-circular EVA for foam applications. |
| Container Loading (20′ FCL) | 20′ FCL: Greenflex ML 60 BCA resin packed in palletized bags, loaded securely in one 20-foot container, protected from moisture. |
| Shipping | Ship Greenflex ML 60 BCA EVA Copolymer Resin in sealed, moisture-proof bags or containers to prevent contamination. Store in a cool, dry area away from heat sources and direct sunlight. Use standard non-hazardous freight; avoid extreme temperatures and humidity. Secure loads to prevent damage during transit. |
| Storage | Store Greenflex ML 60 BCA EVA Copolymer Resin in a cool, dry, well-ventilated area, away from direct sunlight, heat, and ignition sources. Keep containers tightly sealed to prevent moisture absorption and contamination. Avoid exposure to oxidizing agents and excessive humidity. Maintain moderate temperatures to preserve flow and foam properties. Use proper handling and rotate stock to ensure optimal performance. |
| Shelf Life | Shelf life is typically 2 years from manufacturing date when stored in original packaging in cool, dry conditions. |
Greenflex ML 60 BCA is handled in downstream foaming operations as a bio-circular attributed EVA copolymer resin. The bio-circular attribution is maintained under ISCC PLUS or REDcert² mass-balance documentation and does not alter melt flow rate, vinyl acetate distribution, or peroxide cure kinetics relative to the fossil-equivalent grade within normal lot-to-lot variation. Published data for this exact bio-circular attributed configuration are limited; processing windows are therefore drawn from EVA foam grades of equivalent vinyl acetate content 18–21 wt% and melt flow rate 5.5–6.5 g/10 min at 190 °C/2.16 kg per ISO 1133-1:2022.
Running-shoe midsoles are compression-moulded with dual-zone platens held at 165–175 °C. The compound is converted on an open mill or in a Banbury internal mixer before being pelletised into preforms. Viscosity drift between batches must remain below ±8% because the nucleation window of azodicarbonamide is narrow. A representative midsole compound uses resin 100 phr, azodicarbonamide 2.5–4.0 phr, dicumyl peroxide 0.8–1.1 phr, zinc oxide 1.0–1.8 phr, zinc stearate 0.5–0.9 phr, and optional calcium carbonate 5–15 phr. Dicumyl peroxide undergoes thermal homolysis with a half-life of approximately 1 min at 171 °C. Crosslinking and gas generation must overlap inside the mould cavity between 165 °C and 175 °C. If the peroxide network forms too early, expansion is restricted and density remains above 0.30 g/cm³. If blowing agent decomposition outpaces crosslinking, trapped gas escapes through melt channels and large open cells appear. The foam is expanded to 1.8–2.2 times its original thickness, yielding density 0.18–0.22 g/cm³.
Multi-cavity presses with 250–500 kN clamp force are common on production lines. PTFE-coated cavities and weekly alkaline cleaning are required to control azodicarbonamide residue fouling that reduces heat transfer and causes sticking. Demoulding occurs below 50 °C to prevent post-mold cell relaxation and shrinkage. Post-cure aging for 24–48 h at 23 °C/50% RH stabilises dimensional change before assembly. The finished midsole should exhibit rebound 52–58% by ASTM D2632 or ISO 8307, tensile strength ≥2.0 MPa and elongation ≥250% per ISO 1798, and compression set 25–35% after 24 h at 50 °C under ASTM D395 Method B. The moulded midsole is subsequently bonded to outsole rubber and upper mesh by cementing or direct injection.
Marine buoyancy foam is produced in slab form at density 0.05–0.10 g/cm³. Closed-cell content must remain above 90% to preserve buoyancy after prolonged immersion. The compound uses resin 100 phr, azodicarbonamide 6.0–10.0 phr, dicumyl peroxide 0.5–0.9 phr, and zinc oxide 1.5–2.5 phr. Calcium carbonate is excluded because filler particles open channels for water ingress and increase apparent density after immersion. Single-shot compression moulding ramps at 5 °C/min to 160 °C. Core temperature is monitored with embedded thermocouples, and pressure is held until the core falls below 60 °C. Premature pressure release generates internal splits that become capillary pathways for saltwater absorption. Buoyancy aids conforming to ISO 12402-5 require the foam not to absorb more than 1% volume water after 24 h submersion.
Published data for this exact BCA marine configuration are limited. Saltwater ageing values are therefore based on equivalent VA content EVA foam materials, which typically retain tensile strength above 80% after 500 h immersion at 40 °C. Long-term UV exposure requires carbon black or UV-stabilised pigments to avoid surface chalking. VA contents above 26 wt% should be avoided because hydrolysis rate increases with vinyl acetate content. End products include buoyancy layers inside personal flotation devices, marine impact pads, and closed-cell fender inserts.
Flat-sheet foaming lines for fitness and yoga mats operate with a narrower expansion window than midsole moulding. The compound is formulated at resin 100 phr, azodicarbonamide 3.0–5.5 phr, dicumyl peroxide 0.6–1.0 phr, zinc stearate 0.5–1.0 phr, and talc 5–10 phr to control surface tack. The sheet is expanded in a single-shot press at 150–165 °C and passed through cooling rollers set at 15–20 °C to fix cell geometry before embossing. Residual blowing agent content becomes the primary regulatory constraint. Azodicarbonamide decomposition leaves hydrazodicarbonamide residues, and consumer mats sold in the European Union must comply with REACH Annex XVII entry 50 for PAH limits and, when marketed for children, with EN 71-3 migration limits. Indoor air emission is quantified by chamber testing based on ISO 16000-6. Static charge accumulation on cooled sheets causes dust pick-up; inline ionizing bars are installed before winding. Finished mats are supplied at 3–8 mm thickness and 0.10–0.16 g/cm³ density.
Orthotic accommodative cushioning uses the foam at 0.15–0.25 g/cm³ and Shore A 30–45. The resin is compounded at 100 phr with azodicarbonamide 2.0–3.5 phr, dicumyl peroxide 0.7–1.0 phr, zinc oxide 1.0 phr, and calcium carbonate 0–8 phr to adjust hardness without increasing skin-contact leachables. Sheets are compression-moulded at 160–170 °C and cooled under pressure to below 50 °C before demoulding. Gel fraction after cure must exceed 85% by xylene extraction according to ASTM D2765. Higher gel fraction reduces extractables and improves dimensional stability. Water-jet cutting of low-gel foam creates ragged cell walls; cured foam with gel fraction above 85% cuts cleanly and retains edge integrity in contoured orthoses. Biocompatibility is assessed under ISO 10993-5 and ISO 10993-10; extractables are prepared per ISO 10993-12. Products are classified under EU MDR 2017/745 as Class I devices when no therapeutic claim is made. Ester plasticizers should be avoided because migration can cause skin sensitisation. Amine-based stabilizers scavenge peroxide radicals and reduce gel fraction. The BCA mass-balance attribution does not waive lot-specific medical-grade testing. End products include orthotic insoles, brace liners, and accommodative padding in diabetic footwear.
Impact protection pads require transmitted force management, not simply density reduction. Elbow and knee protectors conforming to EN 1621-1:2012 are expanded to 0.12–0.18 g/cm³ with closed-cell content above 90% and thickness 10–20 mm. The compound is based on resin 100 phr, azodicarbonamide 4.0–6.0 phr, dicumyl peroxide 0.8–1.2 phr, zinc oxide 1.5–2.0 phr, and EPDM 15–25 phr to raise tear resistance under high-rate loading. Compression moulding is performed at 165–175 °C under 200–400 kN clamp force. Cooling below 45 °C before ejection prevents post-mold expansion and internal split planes. Azodicarbonamide loading above 6.0 phr can create internal voids that increase transmitted force. Under EN 1621-1:2012 Level 1, transmitted force must remain below 35 kN average, with no single specimen above 50 kN. Static rebound values above 55% do not guarantee impact attenuation because energy absorption is rate-dependent. End products include limb protectors, chest padding, and damping inserts for sports equipment.
Automotive interior foam based on this resin is used in door armrests, knee bolsters, headrest inserts, and sun visor padding. The dry-blend formulation contains resin 100 phr, azodicarbonamide 2.5–4.0 phr, dicumyl peroxide 0.8–1.2 phr, zinc oxide 1.0–2.0 phr, and aluminium trihydrate 15–25 phr where FMVSS 302 flame retardancy is required. ATH loadings above 25 phr raise density and reduce rebound below 35%. Fine particle ATH with an average particle size of 2–5 µm is preferred to limit melt viscosity increase. Slabstock or in-mold foaming is run at 160–175 °C. Non-silicone mould release agents are mandatory because low-molecular siloxanes transfer to windshield glass and increase fogging. Fogging is tested per ISO 6452, with gravimetric deposit limits commonly below 5 mg per OEM specification. VOC release is measured by VDA 277, interior emissions by VDA 278, and odour is graded to VDA 270 with a typical requirement of ≤3 for visible interior parts. Burn rate per FMVSS 302 must be below 100 mm/min. Halogenated flame retardants are restricted by OEM prohibited substances lists; ATH or magnesium hydroxide is used at minimum loading to retain compression set below 12%.
| Downstream segment | Controlling standard | Critical test parameter | Acceptance window |
|---|---|---|---|
| Footwear midsoles | ASTM D2632 | Rebound resilience | 52–58% |
| Footwear midsoles | ISO 1798 | Tensile strength / elongation | ≥2.0 MPa / ≥250% |
| Marine buoyancy | ISO 12402-5 | Water absorption after 24 h | <1% by volume |
| Fitness and yoga mats | EN 71-3 | Migratory elements | Below specified migration limits |
| Orthotic cushioning | ISO 10993-5 | Cytotoxicity | Non-cytotoxic |
| Sports protective padding | EN 1621-1:2012 | Transmitted force | <35 kN average; no specimen >50 kN |
| Automotive interior foam | FMVSS 302 | Flame spread rate | <100 mm/min |
| Automotive interior foam | ISO 6452 | Fogging deposit | <5 mg per OEM limit |
Competitive Greenflex ML 60 BCA EVA Copolymer Resin,Bio-Circular Attributed,High Elasticity Foam Grade prices that fit your budget—flexible terms and customized quotes for every order.
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Greenflex ML 60 BCA EVA Copolymer Resin, Bio-Circular Attributed, High Elasticity Foam Grade is an ethylene-vinyl acetate copolymer supplied as pellets for foam processes requiring high elastic recovery and controlled melt strength. The BCA suffix identifies a bio-circular attributed product under a mass-balance chain-of-custody, normally certified to ISCC PLUS; it is not a measurable molecular substitution and does not create a distinguishable FTIR or DSC signature. The ML 60 designation places the material in a medium-low Shore hardness class after expansion, with typical solid-resin hardness close to 60 Shore A. Lot-specific property values are governed by the certificate of analysis, not by product-selection data.
The table below consolidates representative property ranges for product selection. These ranges are not acceptance limits and do not displace the lot certificate of analysis. Bio-circular attribution does not shift these limits because mass-balance allocation is a chain-of-custody process, not a molecular substitution. Where North American specifications apply, tensile stress-strain data may be cross-checked using ASTM D638-14; however, specimen geometry and strain rate differences can produce absolute values that are not directly comparable with ISO 527-2 results.
| Property | Test Method | Representative Lot-Release Envelope |
|---|---|---|
| Melt mass-flow rate | ISO 1133-1:2022, 190 °C/2.16 kg | 2.5–6.0 g/10 min |
| Vinyl acetate comonomer | ASTM D5594 | 18–28 wt% |
| Density | ISO 1183-1 | 0.940–0.955 g/cm³ |
| Peak melting temperature | ISO 11357-3 | 72–78 °C |
| Vicat softening temperature, A50 | ISO 306 | 54–62 °C |
| Shore A hardness, 15 s | ASTM D2240 | 60–65 |
| Tensile strength at break | ISO 527-2 | 8–12 MPa |
| Elongation at break | ISO 527-2 | 700–850% |
| Flexural modulus | ISO 178 | 25–40 MPa |
| Tear strength, Die C | ASTM D624 | 20–30 kN/m |
Vinyl acetate content in the 18–28 wt% range lowers polyethylene crystallinity and increases dipole-dipole interaction in the amorphous phase. During foam expansion, the polar acetate groups reduce gas diffusivity relative to nonpolar polyolefin elastomers, which assists cell-pressure retention and reduces collapse after die exit. The same polarity raises equilibrium moisture uptake; pellets should be dried before processing as described below. Lot-to-lot variation in vinyl acetate content near the upper end of the range can reduce flexural modulus by approximately 5–10% and shift Vicat softening downward by 2–4 °C. These are the main release parameters to monitor when foam density changes more than 0.02 g/cm³ between batches.
Dynamic oscillatory shear at 150 °C can be used to verify lot-to-lot melt strength. Storage modulus G′ and loss modulus G″ crossover is generally observed below 10 rad/s for high-elasticity EVA foam grades; a lower crossover frequency indicates a longer relaxation-time distribution and better cell stability during bubble growth. If the crossover frequency shifts more than 1.5 rad/s from the reference lot, the foaming temperature should be adjusted before line start. Published data for this specific Greenflex configuration is limited; plant trials should therefore establish lot-to-lot variation against foam density and mean cell diameter before commercial production.
On a co-rotating twin-screw extruder with an L/D of 40:1, atmospheric venting, and a downstream melt pump, melt temperature at the die plate is maintained between 185 °C and 205 °C. Typical melt pressure is 80–140 bar for physical blowing-agent processes. Pre-drying at 60 °C for 4 h is required if the resin has been stored at relative humidity above 60%, because surface moisture produces irregular cell walls and line-speed fluctuation. For injection foaming, barrel temperature follows a reverse profile from 160 °C near the feed throat to 190 °C at the nozzle, with short-shot volume below 75% of maximum shot capacity and clamp force in the range of 0.35–0.55 kN/cm² of projected area. In single-screw extrusion of EVA foam sheet, a grooved feed section and a 24:1 to 30:1 L/D screw with low-shear barrier mixing give more uniform gas dispersion than a conventional three-zone screw.
In chemically crosslinked EVA foam, the cure system must be matched to the decomposition profile of azodicarbonamide. A typical formulation uses azodicarbonamide at 0.3–1.2 phr, dicumyl peroxide at 0.4–0.8 phr, zinc stearate at 0.5–1.0 phr as a kicker, and calcium carbonate at 5–20 phr as a cell nucleator. Azodicarbonamide decomposition onset is near 205 °C; therefore, mixing and melt temperatures are held below 190 °C to prevent pre-foaming in the mixer or feed throat. Two-roll mill mixing at 95–110 °C with a batch residence time below 20 min limits scorch. Press cure at 160–175 °C and 10–15 MPa for 6–10 min is common for slab foam, but cure time must be verified by moving-die rheometry at 170 °C to 90% of maximum torque. The exothermic decomposition of azodicarbonamide and peroxide can raise thick-section core temperature by 8–12 °C; slab thickness above 20 mm therefore requires staged heating or external cooling to avoid macrovoid formation and core blow-out. Formulations containing amine-based accelerators are not recommended because they can lower azodicarbonamide decomposition temperature and generate uncontrolled gas release.
| Comparator | Typical Structure/Property Offset | Processing Consequence |
|---|---|---|
| EVA foam grade with 9–14 wt% vinyl acetate | Lower resilience, higher flexural modulus, lower elongation at break | Requires less cooling; produces stiffer foam with higher heat resistance but reduced dynamic recovery |
| Higher-melt-index EVA foam grade above 6.0 g/10 min | Lower melt strength, narrower foam-expansion window | Higher throughput possible but greater risk of cell coalescence and gas escape; lower melt temperature and faster line speed control are required |
| Conventional fossil-derived EVA of equivalent nominal specification | No measurable difference in DSC melting endotherm, FTIR spectrum, or rheological crossover frequency | ISCC PLUS mass-balance certificate is the sole distinction; processing setpoints are interchangeable |
In comparison to lower-vinyl-acetate EVA foam grades at 9–14 wt%, the material is less crystalline, exhibits lower flexural modulus, and gives higher elongation at break; the trade-off is lower Vicat softening and reduced load-bearing above 70 °C. Against higher-melt-index foam grades above 6.0 g/10 min, the ML 60 BCA product has higher melt strength during bubble growth, which resists cell coalescence but demands tighter temperature control and sometimes higher injection velocity. Against conventional fossil-derived EVA of equivalent nominal specification, the material is not distinguishable by FTIR, DSC, or rotational rheometry; the difference resides in ISCC PLUS mass-balance accounting. The bio-circular claim is a chain-of-custody attribute that permits allocation of sustainable naphtha or circular feedstock to the product; it does not imply a detectable change in the ethylene-vinyl acetate backbone.
Storage in original packaging at 5–35 °C and relative humidity below 60% is required to maintain pellet handling. Materials exposed to condensate should be dried before use. The resin should not be exposed to aromatic solvents, ketones, or strong oxidizing agents, which can swell or oxidatively degrade the vinyl acetate segments. For food-contact applications, the fabricated article must demonstrate compliance with EU Regulation 10/2011 or FDA 21 CFR 177.1520; the resin alone does not confer compliance. The bio-circular attribute remains valid only when downstream supply-chain participants hold the relevant ISCC PLUS certification; uncertified converters cannot transfer the mass-balance claim to a finished article. Continuous service above 70 °C under static load is not recommended.
