| HS Code | 962875 |
| Vinyl Acetate Content | 15% |
| Density | 0.94 g/cm³ |
| Melt Flow Rate | 150 g/10 min (190°C, 2.16 kg) |
| Melting Point | 92°C |
| Vicat Softening Point | 58°C |
| Shore A Hardness | 90 |
| Tensile Strength | 8.5 MPa |
| Elongation At Break | 800% |
| Crosslinkable | Yes, peroxide crosslinkable |
| Foam Grade | Yes, crosslinkable foam grade |
| Processing Temperature Range | 130–180°C |
As an accredited EVAtech 150I/15A EVA Copolymer Compound,Crosslinkable Foam Grade factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | EVAtech 150I/15A EVA Copolymer Compound is supplied in 25 kg polyethylene bags, palletized and shrink-wrapped for safe transport. |
| Container Loading (20′ FCL) | About 20 metric tons per 20′ FCL, packed in 25 kg bags on pallets, shrink-wrapped and containerized for safe transport. |
| Shipping | Ship EVAtech 150I/15A as non-hazardous resin pellets in sealed moisture-proof bags or FIBCs. Store away from heat, ignition sources, and direct sunlight. Keep dry during transit. Avoid dust accumulation and use proper ventilation. Secure loads properly; no special transport classification required under standard regulations. |
| Storage | Store in a cool, dry, well-ventilated area away from heat, ignition sources, and direct sunlight. Keep containers tightly sealed to prevent moisture absorption and contamination. Avoid elevated temperatures, as these may trigger premature crosslinking. Under recommended conditions, shelf life is typically 12 months from date of manufacture. |
| Shelf Life | Store in a cool, dry place away from sunlight. Shelf life is typically 6 months from production date. |
In automotive interior foam lines, EVAtech 150I/15A is fed as a pelletized or sheeted compound into continuous calendering systems where the base resin’s nominal 15 wt% vinyl acetate comonomer fraction provides a melt-state viscosity window compatible with high-filler loadings and chemical blowing agents. The mixing sequence on production equipment—typically a 75 L tangential internal mixer running at 35–45 rpm and a two-roll mill set at 90–105 °C—demands that the compound temperature remain below 110 °C during filler and blowing agent dispersion; exceeding this threshold triggers premature decomposition of azodicarbonamide and can generate scorch in the presence of dicumyl peroxide. A reference formulation for automotive interior sheet is 100 phr EVAtech 150I/15A, 2.0–4.0 phr azodicarbonamide, 0.6–1.2 phr dicumyl peroxide, 1.0–2.0 phr zinc oxide, 0.5–1.0 phr zinc stearate, and 5–15 phr calcium carbonate, though specific loadings shift with target density. Calendered sheet at 1.8–3.2 mm thickness is then expanded in a multi-zone hot-air tunnel with stage temperatures from 155 °C preheat to 190–200 °C cure; residence time must be balanced because under-cure leaves residual peroxide that increases volatile organic compound emissions, while over-cure produces cell wall rupture and density collapse. Finished interior parts—dash insulator backing, door panel padding, trunk mats, and HVAC gaskets—must meet 49 CFR 571.302 (FMVSS 302) horizontal burn rates no greater than 102 mm/min, and in European programs, VDA 278:2011-02 VOC and FOG limits; formulators should verify that the peroxide decomposition by-products of the final foam fall within the vehicle OEM’s total VOC ceiling, usually reported in µg/g as toluene equivalents. Batch-to-batch variance in moisture content above 0.1 wt% has been observed to create surface pinholes in closed-cell sheets, so pre-drying at 70–80 °C for 2 h is imposed when storage relative humidity exceeds 60%.
Injection molding of expanded footwear midsoles from EVAtech 150I/15A must reconcile two simultaneous kinetic events: decomposition of azodicarbonamide into nitrogen-rich gas and generation of a peroxide-initiated crosslink network that limits cell wall drainage. The practical consequence is a narrow processing window at the mold level. On a 400-ton toggle injection molding machine using a compression screw with an L/D ratio of 21:1, barrel temperatures are profiled from 90 °C at the feed throat to 110 °C at the nozzle, while the mold is held at 170–185 °C. Mold opening distance is typically set to 1.6–1.8 times the final part thickness; if the mold opens before sufficient melt strength develops, trapped gas is released as surface blowholes, whereas delayed opening after crosslink density exceeds gas pressure produces delamination and severe dimensional recovery. A reference compound loading is 100 phr EVAtech 150I/15A, 10–25 phr pelletized polyolefin elastomer, 1.8–3.2 phr azodicarbonamide, 0.4–0.8 phr dicumyl peroxide, 1.0–2.5 phr zinc oxide, 0.5–1.5 phr zinc stearate, and 5–10 phr talc or calcium carbonate; zinc oxide functions as both a crosslinking coagent and a blowing agent activator, so increasing ZnO above 2.5 phr can advance azodicarbonamide decomposition and introduce porosity already in the pelletizing step.
Finished midsoles are tested under ASTM D3575-20 for tensile strength and elongation, ISO 1856:2018 for compression set at 50% deflection, and EN ISO 20344:2021 for flexural fatigue; European supply programs additionally require that the foam meet Regulation 1907/2006 Annex XVII entry 50 PAH limits for plasticized or rubber components in prolonged skin contact, with benzo[a]pyrene content not exceeding 1 mg/kg and total listed PAH content not exceeding 100 mg/kg. The terminal product mix includes running shoe midsoles, recovery sandal footbeds, casual shoe wedges, and insert boards. Residual peroxide by-products contribute to the characteristic odor in low-ventilation footwear; production facilities therefore run post-cure maturation rooms at 50–60 °C for 24–48 h and conduct periodic purge-air monitoring because accumulated decomposition products can exceed workplace exposure limits if the room is not ventilated.
Closed-cell EVA foam blocks derived from EVAtech 150I/15A are produced in thicknesses from 25 mm to 60 mm for martial arts mats, gymnastics landing surfaces, and fitness floor tiles. The compound is formulated at 100 phr with 2.5–5.0 phr azodicarbonamide, 0.5–0.9 phr dicumyl peroxide, 1.5–3.0 phr zinc oxide, 0.5–1.0 phr zinc stearate, and 5–20 phr calcium carbonate; higher filler loadings raise compression deflection but reduce tear resistance, so the loading is selected against the target density bracket. Block production uses a press vulcanization process: filled compound is pre-formed in a 900 mm × 900 mm × 100 mm mold at 110–120 °C for deaeration, then the mold temperature is ramped to 170–190 °C with a programmed pressure relief step to allow expansion without blowing mold seams. After cooling, blocks are slit on a horizontal band knife into sheets, and density is checked using a water displacement method referencing ISO 845:2006; the target density for impact mats is usually 40–80 kg/m³ depending on shock attenuation requirements. For sports flooring installed in multi-purpose halls, compliance evidence often includes ASTM F1292-22 critical fall height data generated on the complete installed system, while material-level quality is tied to ASTM D3575-20 compression set and ISO 1798:2008 tensile strength. The process conflict appears in thick slabs: because EVA foam has low thermal conductivity and exothermic peroxide cure, center-of-block temperature can lag the surface by 10–15 °C, causing density gradients between skin and core. Published data for this specific configuration is limited; manufacturers typically address the gradient by increasing the cure plateau rather than raising oven setpoint. Terminal parts include taekwondo mats, yoga blocks, gymnastic landing mats, and anti-fatigue standing surfaces.
Where national building codes require reaction-to-fire evidence for installed foam components, EVAtech 150I/15A is formulated with radical loadings that change melt rheology and require lower shear input during mixing. At 100 phr, the compound is commonly extended with 80–130 phr aluminum trihydroxide or magnesium dihydroxide, 5–15 phr zinc borate, 2.0–4.0 phr azodicarbonamide, 0.6–1.2 phr dicumyl peroxide, 1.5–2.8 phr zinc oxide, and 0.5–1.2 phr zinc stearate; the high filler loading raises compound viscosity, so process operators reduce rotor speed in the 75 L internal mixer and maintain a drop temperature below 108 °C to avoid peroxide scorch. The mixed batch is then calendered or extruded as sheet and expanded through a continuous hot-air tunnel with a peak zone of 180–195 °C. Building code compliance evidence is specific to the fabricated product and installation system, not to the compound alone; typical assessments include EN 13501-1:2018 for European reaction-to-fire classification, ISO 11925-2:2020 for ignitability, ASTM E84-21a for surface burning characteristics, and UL 94 HF-1 for horizontal burning foam materials. The compound must also fall within limits imposed by Directive 2011/65/EU RoHS Annex II and Regulation 1907/2006 REACH SVHC candidate list if the foam is used in building hardware or electrical enclosures. The operational boundary is humidity: filled or unfilled material stored above 60% relative humidity typically requires pre-drying at 70–80 °C for 2 h before calendering because adsorbed moisture nucleates irregular cells and creates visible surface pits.
| Finished product | Primary standard | Relevant indicator |
|---|---|---|
| Pipe insulation tube | EN 13501-1:2018 | Euroclass E or higher depending on installation |
| Expansion joint filler | ASTM D1056-20 | Grade 2 closed-cell compression-deflection range |
| Acoustic underlayment | ISO 10140-3:2010 | Impact sound insulation performance on installed floor assembly |
| RoHS-restricted electrical enclosure gasket | Directive 2011/65/EU | Lead <0.1 wt%, cadmium <0.01 wt% |
For marine and water-contact closed-cell foam applications, EVAtech 150I/15A is processed by compression molding thick buns followed by water-jet or band-knife cutting. A typical formulation for marine buoyancy applications is 100 phr compound, 2.0–3.5 phr azodicarbonamide, 0.6–1.0 phr dicumyl peroxide, 2.0–3.0 phr zinc oxide, 0.5–1.0 phr zinc stearate, and 0–5 phr calcium carbonate; filler is minimized where low water pickup is the controlling end-use requirement. Molding is performed in steel negative-pressure presses with mold temperatures from 160 °C to 185 °C, and the cure cycle is extended at the plateau stage to close surface cells before the mold is opened. The resulting foam is sampled by the manufacturer for water absorption under ISO 62:2008 immersion at 23 °C for 24 h, with typical acceptance targets below 2% by volume for marine applications where prolonged water contact occurs. Personal flotation devices and structural buoyancy modules are outside the scope of the compound alone; compliance for those applications is determined on the finished assembled product under ISO 12402-7:2020 or national type-approval rules, and the compound itself is only a component in the buoyancy system. Terminal products include boat fender cores, floating mat layers, kayak seat supports, and buoyancy block segments.
Medical and orthotic EVA foam conversions require more restrictive residual by-product control because the finished product contacts skin for extended periods. A reference formulation for orthotic cushioning is 100 phr EVAtech 150I/15A, 1.5–2.5 phr azodicarbonamide, 0.5–1.0 phr bis(tert-butylperoxyisopropyl)benzene or dicumyl peroxide, 1.0–2.0 phr zinc oxide, 0.5–1.0 phr zinc stearate, and 0–5 phr calcium carbonate; the lower blowing agent range reduces residual gas pockets, and the peroxide type is selected to minimize volatile aromatic decomposition products. Foam blocks are produced by compression molding at 170–185 °C, then post-cured in a ventilated oven at 70–80 °C for 4–8 h to drive residual blowing gas and peroxide fragments to low levels before cutting. Finished devices are tested according to ISO 10993-5:2009 for cytotoxicity and ISO 10993-10:2010 for skin sensitization; the compound is not inherently certified for any medical device, and published data for this specific configuration is limited, so each downstream manufacturer must generate device-level biological evaluation data on the final formulated foam. REACH 1907/2006 and RoHS 2011/65/EU constraints still apply to production scrap and packaging. Terminal products include orthotic insole blanks, wheelchair cushion core layers, prosthetic socket padding, and positioning wedge components.
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EVAtech 150I/15A is an ethylene-vinyl acetate copolymer compound supplied in pellet or sheet form and classified as a crosslinkable foam grade. The alphanumeric designation is not a direct ISO 1133-1 or ASTM D1238 melt-flow index; in commercial practice, the 15A field typically corresponds to a nominal vinyl acetate comonomer content of approximately 15 wt%, while the 150I field identifies an internal grade modifier or compounding sequence rather than a melt index of 150 g/10 min. The supplier certificate of analysis remains the binding specification. The material contains a peroxide- or radiation-responsive crosslinking system and a chemical blowing-agent package intended for closed-cell foam expansion. It is processable on Banbury internal mixers, two-roll mills, and low-shear single-screw or twin-screw extruders with L/D ratios from 24:1 to 32:1. The thermal processing window is narrower than that of unmodified EVA; barrel or roll temperatures above 110°C produce scorch, while insufficient blowing-agent decomposition leaves high-density unexpanded regions.
Incoming inspection for EVAtech 150I/15A should verify vinyl acetate content, melt flow rate, moisture, ash, and thermal transitions before direct compounding or foam expansion. Vinyl acetate content controls polarity, gas permeability, and peroxide crosslinking efficiency; a deviation of ±1 wt% shifts the optimum peroxide dosage and compression set, particularly for density targets below 0.20 g/cm³. Melt flow rate is determined by ISO 1133-1:2022 at 190°C/2.16 kg and should be compared with the batch certificate; the 150I field is not an MFR value. Residual moisture above 0.10 wt% causes surface pitting and irregular cell coalescence; pre-drying at 60°C for 4 h is applied when storage relative humidity exceeds 60%. Ash content by ASTM D2584-18 is used to detect filler excursions or crosslinking-agent agglomerates.
| Property | Method | Expected class range | Control note |
|---|---|---|---|
| Vinyl acetate comonomer content | ASTM D5594-18 | 14–18 wt% | Certificate of analysis |
| Melt flow rate, 190°C/2.16 kg | ISO 1133-1:2022 | 1.0–4.0 g/10 min | Do not interpret 150I as MFR |
| Pellet density, 23°C/50% RH | ISO 1183-1:2019 | 0.940–0.960 g/cm³ | Condition 40 h before test |
| Mooney viscosity ML 1+4, 100°C | ISO 289-1:2014 | 20–35 MU | Processability indicator |
| Residual moisture | ISO 15512:2019 | <0.10 wt% | Karl Fischer titration |
| Ash content, 600°C furnace | ASTM D2584-18 | <1.5 wt% | Filler/crosslinker control |
| Melting peak, DSC second heat | ISO 11357-3:2018 | 88–97°C | Peak endotherm |
On a 40:1 L/D co-rotating twin-screw extruder with segmented screw elements, the compound is fed in the first barrel section; liquid peroxide and processing aids are injected downstream into the melt seal to prevent localized shear-induced decomposition. Dicumyl peroxide exhibits a 1 h half-life at approximately 135°C and a 1 min half-life near 171°C. Barrel zones above 120°C reduce scorch safety, and the die head is typically maintained at or below 105°C. The blowing agent is added as a pre-dispersed masterbatch or through side-stuffing after peroxide distribution. Premature crosslinking appears as rising melt pressure, motor torque, and surface shark-skin on the sheet; scorched compound cannot be reworked. On a two-roll mill, the compound is processed at 95–110°C with a friction ratio of 1.1:1 to 1.2:1. Sheet thickness is held to ±0.2 mm to support uniform heat transfer during subsequent expansion.
The expansion of EVAtech 150I/15A depends on the overlap between peroxide decomposition and chemical blowing-agent gas yield. Azodicarbonamide decomposition in EVA foam compounds commonly falls in the 195–215°C range, but the actual onset is influenced by zinc oxide or zinc stearate activators. In compression-molded sheet expansion, the cure cycle is typically 160–175°C under 15–20 MPa platen pressure for 8–15 min, followed by controlled pressure release to permit cell growth. Gel content, determined by ASTM D2765-16, should reach 60–85 wt% after cure; values below 55 wt% can produce cell-wall rupture and coarse cell structures. Closed-cell content measured by ISO 4590:2016 is commonly above 85% for crosslinked EVA foams at densities from 0.10 g/cm³ to 0.25 g/cm³. Compression set per ISO 815-1:2014 at 50°C for 22 h remains below 35% at 0.15 g/cm³ for this class; non-crosslinked EVA foam of equivalent density can exceed 50% under the same conditions. Tensile elongation at break per ISO 37:2017 commonly falls in the 150–300% range for crosslinked EVA foams at 0.15 g/cm³, but published data for this specific configuration is limited.
EVAtech 150I/15A differs from general-purpose EVA film and extrusion grades in melt-state extension behavior and cure response. Unmodified EVA film grades often have MFR values from 2.0 g/10 min to 20.0 g/10 min, narrow molecular weight distribution, and no peroxide or blowing-agent residue; this foam compound is formulated with a broader molecular weight distribution and a reactivity package that increases extensional viscosity as crosslinking initiates. Compared with LDPE foam compounds, the 15 wt% vinyl acetate content reduces crystallinity and improves low-temperature flexibility, but lowers the upper service temperature and increases polar-solvent sensitivity. Compared with metallocene POE foam grades, EVA typically provides higher green strength and established compression-molding behavior; POE can provide lower residual odor and improved ageing behavior but may require higher peroxide dosage. The substitution decision should be made using compression set data per ISO 815-1:2014, tensile property data per ISO 37:2017, and density data per ISO 845:2009, not by hardness or visual cell structure alone.
Comparison of EVAtech 150I/15A with non-crosslinked EVA, LDPE, and POE foam grades requires separating class-level published data from lot-specific certificate values. The table below provides representative property ranges for foam classes, not guaranteed product specifications.
| Property | Crosslinkable EVA foam compound class | Non-crosslinked EVA foam | LDPE foam | POE foam | |
|---|---|---|---|---|---|
| Density after expansion | ISO 845:2009 | 0.10–0.30 g/cm³ | 0.08–0.25 g/cm³ | 0.02–0.10 g/cm³ | 0.08–0.25 g/cm³ |
| Gel content after cure | ASTM D2765-16 | 60–85 wt% | 0 wt% unless crosslinked | 0–5 wt% for peroxide-free grade | 55–80 wt% after peroxide cure |
| Compression set 22 h/50°C | ISO 815-1:2014 | 10–35% | 50–80% | 30–60% | 15–40% |
| Continuous dry-air service temperature, class boundary | ISO 11346:2023 ageing evaluation | 70–90°C | 60–70°C | 70–80°C | 80–105°C |
When EVAtech 150I/15A replaces LDPE foam in a sealing or cushioning line, the higher polarity of EVA requires revalidation of adhesive compatibility, moisture absorption, and compression stress relaxation. When it replaces POE foam, lower peroxide dosage may be required because of the vinyl acetate radical-scavenging behavior; this must be confirmed by moving-die rheometer torque differences and gel content measurements. Non-crosslinked EVA foam is not a direct drop-in replacement where compression set below 35% after 22 h at 50°C is required.
After expansion, crosslinked EVA foam retains viscoelastic stress and trapped gas that diffuses gradually from closed cells. If the compound is not adequately crosslinked, cell walls undergo viscous flow during cooling, producing gauge variation and shrinkage. Shrinkage after demolding is typically controlled by holding the foam at 60–80°C for 4–24 h in forced-air ovens, followed by dimensional change measurement per ASTM D3574-17. Thermal degradation onset measured by thermogravimetric analysis per ISO 11358-1:2022 occurs above 300°C under nitrogen for EVA, but oxidative decomposition starts lower. The crosslinked network raises the onset of viscous flow and reduces compression set after ageing at 70°C for 22 h. Residual blowing-agent decomposition products, particularly cyanuric acid from azodicarbonamide, can bloom on the foam surface if cure is incomplete; this is detected by FTIR-ATR or visual inspection under 10× magnification. Published data for EVAtech 150I/15A-specific degradation kinetics is limited; the above values are class ranges for 15 wt% vinyl acetate crosslinked EVA foam.
Storage stability of the unexpanded compound is influenced by humidity and temperature. The material should be stored below 30°C and 60% RH in closed packaging; moisture pickup above the 0.10 wt% threshold increases melt-phase void formation. Peroxide-containing compounds have finite shelf life; typical storage stability for dialkyl peroxide masterbatches is 6–12 months at 20–25°C, but the exact shelf life for EVAtech 150I/15A should be taken from the manufacturer's technical data sheet.
When fillers such as calcium carbonate or fumed silica are added, the compound's melt viscosity increases and the expansion ratio decreases. Addition of 5–20 phr calcium carbonate can raise density by 0.03–0.10 g/cm³ and reduce tensile elongation; these effects are measured by ISO 1183-1:2019 and ISO 37:2017. Blowing-agent levels must be re-optimized when filler loading exceeds 10 phr because nucleating effects increase cell count but reduce cell size. EVA-compatible color masterbatches are incorporated at 1–3 wt%; high-acid or amine-functional carrier resins should be avoided because they can alter peroxide cure kinetics and final crosslink density.
In industrial foam manufacture, EVAtech 150I/15A is used in compression-molded footwear midsoles, orthopedic insoles, gaskets, buoyancy aids, and anti-vibration padding. For footwear, expanded density and Asker C hardness are measured by ISO 845:2009 and JIS K 7312:1996; hardness values for this class are commonly 45–60 Asker C after expansion to 0.15–0.20 g/cm³. For gaskets, compression force deflection at 25% strain is screened by ISO 3386-1:2014, and compression set at 70°C for 22 h is evaluated by ISO 815-1:2014. Thermal insulation applications require thermal conductivity measurements by ISO 8302:1991; published data for EVAtech 150I/15A in this configuration is limited. The compound is colored with EVA-compatible masterbatches; amine-based additives and high-pH fillers should be avoided because they can interfere with peroxide decomposition and alter final cure state. Compliance documentation should be confirmed under EC No 1907/2006 (REACH) and RoHS recast 2011/65/EU before use in regulated applications.
