| HS Code | 293808 |
| Vinyl Acetate Content | 12% |
| Melt Flow Rate | 2.5 g/10 min |
| Density | 0.935 g/cm³ |
| Melting Point | 94°C |
| Freezing Point | 76°C |
| Vicat Softening Point | 73°C |
| Shore Hardness | D 40 |
| Tensile Strength At Break | 19 MPa |
| Elongation At Break | 850% |
| Flexural Modulus | 45 MPa |
| Brittleness Temperature | -100°C |
| Thermal Stability | Good |
As an accredited ELVAX 3135XZ Ethylene Vinyl Acetate Copolymer factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | ELVAX 3135XZ is supplied as free-flowing pellets in 25 kg multi-layer paper bags, ensuring safe handling and product integrity. |
| Container Loading (20′ FCL) | 20′ FCL loaded with ELVAX 3135XZ ethylene vinyl acetate copolymer, palletized, secured, and containerized for safe transport. |
| Shipping | ELVAX 3135XZ is supplied as solid ethylene vinyl acetate copolymer pellets, typically packaged in multi-walled paper bags or bulk sacks. Ship dry, away from heat sources, humidity, and direct sunlight. No special hazard classification applies, but ensure proper ventilation and avoid dust accumulation. Transport in clean, covered containers to prevent contamination. |
| Storage | Store ELVAX 3135XZ in a cool, dry, well-ventilated area away from direct sunlight, heat, and ignition sources. Keep containers tightly closed to prevent moisture absorption and contamination. Avoid storage near strong oxidizing agents. Maintain temperatures below 30°C (86°F) and protect from physical damage. Use within recommended shelf life to ensure consistent performance. |
| Shelf Life | Store in original packaging away from heat, moisture, and sunlight. Typical shelf life is two years from date of shipment. |
Extrusion coating of ELVAX 3135XZ as a sealant skin layer on three-layer coextruded cast film and foil-lamination lines uses either 100% resin for monolayer foil coating or 15–30 wt% blends with linear low-density polyethylene when hot-tack resistance must be retained after retort. The melt temperature is limited to 260–275 °C, die lip gap set at 0.5–0.8 mm, and air gap maintained at 120–180 mm; frost line oscillation above ±5 mm indicates draw resonance and corresponds to a heat-seal initiation temperature shift exceeding 8 °C across the web. The downstream process employs a single-screw extruder with 32:1 L/D, 50/80/250 mesh screen pack, and a chrome-plated chill roll held at 10–16 °C; corona discharge is applied at 42–45 mN/m to prepare the surface for print or lamination. Terminal product types include lidding films for dairy cups, peel-push lidding for pharmaceutical blister packs, and heat-sealable layers in retort pouches. Food-contact compliance follows FDA 21 CFR 177.1350 for extractive limits, EU 10/2011 with an overall migration limit of 10 mg/dm², and REACH EC No 1907/2006 for monomer and additive inventories.
Compounding ELVAX 3135XZ with mineral flame retardants for low-voltage building wire jacketing is constrained by the 180–190 °C thermal threshold for aluminum trihydroxide; exceeding this threshold liberates bound water, generating internal foam cells and reducing tensile strength by more than 25% when measured by ISO 527-3. A starting formulation comprises 100 phr ELVAX 3135XZ, 120–170 phr aluminum trihydroxide with median particle size 1.2–2.0 μm, 20–50 phr magnesium dihydroxide, 1–2 phr hindered phenolic antioxidant, 0.5–1.0 phr zinc stearate, and 3–6 phr vinyl silane-functionalized processing aid. The filler addition ratio remains process-critical: below 120 phr, limiting oxygen index measured by ASTM D2863-19 falls below 30%; above 170 phr, melt flow rate at 190 °C/2.16 kg measured by ISO 1133-1:2022 drops below 0.8 g/10 min and produces melt fracture on a 65 mm single-screw cable sheathing line with 25:1 L/D. Compounding is performed on a 44:1 L/D co-rotating twin-screw extruder at 200–250 rpm, with barrel temperatures from 120 °C in the feed zone to 165 °C at the die; reverse kneading blocks are positioned after the second feeding zone to disperse filler agglomerates below 20 μm. Sheathing extrusion uses a crosshead die with draw ratio 1.1–1.3 and a pressure-relief zone at 2.5–3.0 MPa. Terminal product types include low-voltage power cable sheathing under IEC 60502-1, control cable jackets, and marine shipboard cable jackets. Compliance testing includes IEC 60754-1 for halogen acid gas content, IEC 60754-2 for aqueous pH, IEC 61034-2 for smoke density, and REACH EC No 1907/2006 Annex XVII restrictions.
| Test parameter | Method | Typical acceptance limit for HF-FR sheathing |
|---|---|---|
| Halogen acid gas content | IEC 60754-1 | ≤ 5.0 mg/g |
| Aqueous pH | IEC 60754-2 | ≥ 4.3 |
| Smoke density transmittance | IEC 61034-2 | ≥ 60% |
| Limiting oxygen index | ASTM D2863-19 | ≥ 30% |
| Tensile strength retention after 7 days at 110 °C | ISO 527-3 | ≥ 75% of original |
Chemical blowing of ELVAX 3135XZ in microcellular midsole foaming uses 2.0–4.0 phr azodicarbonamide, 0.5–0.8 phr dicumyl peroxide, 0.5–1.0 phr zinc oxide, 10–20 phr calcium carbonate, and 0.3–0.6 phr stearic acid on a two-roll mill at 90–105 °C. The blowing agent decomposition onset is 185–195 °C, while the dicumyl peroxide half-life at 180 °C is approximately 1.5 min; this overlap requires a press cure cycle of 8–12 min at 160–170 °C to separate crosslinking from gas release. Expansion ratio is held between 1.5× and 2.5×; below 1.5×, Shore A hardness measured by ISO 868 rises above 60, while above 2.5×, tear strength measured by ISO 34-1 falls below 8 kN/m. Production equipment includes a Banbury internal mixer at 70–90 °C, a calendering line set to sheet thickness 2.0–4.0 mm, compression molding in 400×400 mm multi-cavity molds, and hydraulic cutting. Terminal product types include running shoe midsoles, insoles, sandal units, and protective footwear cushioning. Compliance screening follows REACH EC No 1907/2006 for SVHC constituents and decomposition byproducts, ISO 868 for hardness, ISO 34-1 for tear resistance, and ISO 4649 for abrasion resistance; where the foam is used in consumer footwear, the finished part is screened for restricted substances under the applicable national regulation of the destination market.
Where ELVAX 3135XZ serves as a carrier resin in carbon black and color masterbatches for polyolefin film extrusion, the resin is pre-dried at 70 °C for 4 h if ambient relative humidity exceeds 60%. The carrier is dosed at 35–45 wt% of the masterbatch, with pigment loading between 40–60 wt% and a low-molecular-weight polyethylene wax at 5–10 wt% as dispersant. Production of the masterbatch is performed on a 40:1 L/D co-rotating twin-screw extruder with a distributive mixing section, underwater pelletizer, and centrifugal dryer; melt temperature is held at 150–170 °C, and die pressure is maintained below 6.0 MPa to prevent pigment agglomeration. When melt viscosity falls below 0.25 Pa·s at 150 °C during resin lot verification, pigment particle wetting becomes insufficient and the pelletized masterbatch shows filter pressure rise above 0.8 MPa during letdown. Amine-based hindered stabilizers are excluded because they accelerate ester hydrolysis at processing temperatures; carboxylated dispersants are likewise avoided at addition levels above 0.5 wt% to prevent acid-catalyzed chain scission. The resulting pellets are let down at 2–5 wt% into polyolefin film, blow-molded containers, and injection-molded closures. Terminal product types include color masterbatch pellets for polyethylene film, carbon black masterbatch for geomembranes, and custom color concentrates for rigid packaging closures. Compliance of the masterbatch itself is established under FDA 21 CFR 177.1350 when the carrier is used in food-contact articles, EU 10/2011 for plastic food-contact materials, and REACH EC No 1907/2006 for monomer and additive inventories.
During blown film coextrusion of heavy-duty sacks and agricultural greenhouse covers, ELVAX 3135XZ is dry-blended into linear low-density polyethylene at 8–12 wt% to shift the film's brittleness temperature below −40 °C when measured by ASTM D746-20. The addition level above 12 wt% reduces bubble stability on 300 mm air ring lines running at 60–80 kg/h; the film then exhibits gauge variation above ±8% and a dart impact decrease of more than 15% measured by ISO 7765-2. The extrusion process uses a 65 mm single-screw extruder with 28:1 L/D, barrier screw, and screen pack 60/120/200; barrel profile is 150–190 °C, die temperature is 190–205 °C, and frost line height is held at 500–700 mm. Terminal product types include heavy-duty industrial sacks, agricultural greenhouse films, and lamination base films for flexible packaging. Food-contact compliance follows FDA 21 CFR 177.1350 and EU 10/2011; REACH EC No 1907/2006 applies to all additives and monomers in the final film. Where ambient relative humidity exceeds 60%, the resin is pre-dried at 60–70 °C for 4 h before dry-blending.
Competitive ELVAX 3135XZ Ethylene Vinyl Acetate Copolymer prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8615380400285 or mail to sales2@liwei-chem.com.
We will respond to you as soon as possible.
Tel: +8615380400285
Email: sales2@liwei-chem.com
Flexible payment, competitive price, premium service - Inquire now!
ELVAX 3135XZ ethylene vinyl acetate copolymer is a low-vinyl-acetate thermoplastic resin intended for extrusion, compounding, and formulated adhesive systems. The base resin carries a nominal vinyl acetate content of 12 wt% when determined by ASTM D5594 and a melt index of 0.35 g/10 min at 190°C under 2.16 kg load in accordance with ASTM D1238. Density reported by ASTM D792 is 0.935 g/cm³ at 23°C. Vicat softening point tested to ASTM D1525 falls in the range 74°C to 78°C, and the differential scanning calorimetry melting peak under ASTM D3418 is near 96°C. The XZ suffix may identify a pellet surface-additive package rather than a change in ethylene-vinyl acetate molar composition; therefore the certificate of analysis is the controlling specification for incoming inspection. Published data for the exact XZ suffix are limited, and users should verify whether the suffix modifies slip, antiblock, or stabilization behavior.
At 12 wt% vinyl acetate, the copolymer retains a comparatively high degree of polyethylene chain regularity. This structural feature produces a crystalline melting peak, measured by ASTM D3418, that is higher than those of typical 18 wt% and 28 wt% vinyl acetate extrusion grades. The low comonomer content also reduces low-temperature flexibility and polar substrate adhesion relative to those higher-VA products. Adhesion retention on untreated aluminum foil and polar polymer films is therefore formulation- and surface-treatment-dependent; polar wetting tension above 38 dyn/cm is commonly specified before coating or lamination. Quantitative T-peel values under ASTM D1876 for 3135XZ-based formulations are not available from the base resin datasheet and must be generated on the target substrate.
Because the melt index is 0.35 g/10 min, the molecular weight distribution is positioned at the high-viscosity end of standard EVA extrusion grades. This characteristic increases melt strength and bubble stability in blown film but also raises die pressure and screw torque. On production-scale single-screw extruders with 24:1 to 30:1 L/D barrels and barrier screws, barrel temperature profiles are set from 150°C in the feed zone to 190–210°C at the die. Screen packs with 60/80/100 mesh construction are typical, but screen pressure differential should be recorded and the pack changed at a defined machine-specific pressure threshold. Lot-to-lot melt index variation is not stated in the generic datasheet; incoming inspection should include ASTM D1238 melt index and ASTM D792 density. A melt index change of ±0.05 g/10 min can produce a detectable die pressure change in a 40 mm single-screw extruder, but published data for the exact XZ suffix are limited.
Compared with grades containing 28 wt% vinyl acetate, 3135XZ exhibits lower molecular polarity, higher crystallinity, and higher heat resistance. The lower VA concentration shifts the melting peak upward by approximately 10°C to 20°C relative to a 28 wt% VA resin, as measured by ASTM D3418. Conversely, low-temperature flexibility and tack are reduced; an EVA with 28 wt% VA is preferred where subzero seal initiation or aggressive polar adhesion is required. Compared with high-melt-index grades in the 2 g/10 min to 25 g/10 min range, the 0.35 g/10 min flow rate of 3135XZ raises die pressure and melt strength. This difference makes the grade applicable to blown film, high-viscosity adhesive layers, and extrusion coating where melt stability is critical, but it reduces the maximum thin-coating line speed and makes pneumatic spray application impractical.
When compared with acid-functionalized ethylene copolymers, 3135XZ contains no carboxylic acid groups. Adhesion to aluminum, polyamide, and polycarbonate is therefore lower unless a tie-layer, primer, or acid-containing coextruded layer is used. The dispersion component of surface energy is still sufficient for adhesion to corona-treated polyethylene and polypropylene, but peel performance must be evaluated under ASTM D1876 on the specific substrate. Published data for the exact XZ suffix in acid-containing multilayer structures are limited.
In blown film operations, the high melt strength of 3135XZ allows stable bubble formation, but die gap and cooling rate must be adjusted to prevent excessive orientation. Frost-line height is maintained between 1.5 m and 2.5 m for typical low-MI EVA film lines, and die temperatures are kept near 190°C to 210°C. If the resin is coextruded with high-MI skin layers, the low-MI core layer should be placed centrally to avoid melt-fracture defects at the die lip. Melt temperature should not exceed 230°C for extended residence time because deacetylation of vinyl acetate repeat units releases acetic acid and can generate gel particles. Chrome-plated screws, stainless steel adapters, and stainless steel dies are standard for long-run high-temperature EVA extrusion.
Predrying is not normally required when pellets are stored in sealed original packaging at 20°C to 25°C. If storage relative humidity exceeds 60% or condensation is present, drying at 60°C for 4 h in a desiccant dryer is recommended to prevent surface splay. In high-shear compounding on a 40:1 L/D co-rotating twin-screw extruder, viscous dissipation can raise melt temperature above the barrel set point. Barrel cooling in zones 5 to 7 and low-shear mixing elements are used to keep melt temperature below 220°C. For formulations containing calcium carbonate or talc at 20 wt% to 30 wt%, specific energy input should be recorded; published data for this exact configuration with 3135XZ are limited.
Capillary rheometry under ASTM D3835 shows pseudoplastic flow typical of low-melt-index EVA. At apparent shear rates from 10 s⁻¹ to 1000 s⁻¹, viscosity decreases with increasing shear; the exact power-law index for 3135XZ must be taken from the supplier datasheet or measured on the lot in use. The low melt index raises head pressure in a 45 mm single-screw extruder at a given throughput relative to a 25 g/10 min EVA. Dies and breaker plates should be designed so that head pressure remains below the extruder thrust rating. In coextrusion, viscosity matching with adjacent layers is critical; the low-MI layer should be paired with high-MI skin layers only if the multilayer die has sufficient flow-channel adjustment.
Because the rheological response is shear-sensitive, a narrow processing window exists between complete melting and deacetylation. The practical melt-temperature window for continuous extrusion is approximately 170°C to 220°C. At the lower boundary, low melt temperature raises die pressure and can produce melt fracture in thin sections. At the upper boundary, deacetylation leads to acetic acid release, gel accumulation, and color shift. The exact onset of deacetylation should be confirmed by thermogravimetric analysis under nitrogen at a heating rate of 10°C/min; published data for the exact XZ suffix are limited.
For injection molding, melt temperature is set between 180°C and 220°C, and mold temperature is set between 20°C and 40°C. Because the material is semicrystalline, mold cooling time should be established by short-shot studies and part weight stability rather than by visual gate freeze alone. Clamp force requirements follow standard projections for semicrystalline olefins with similar melt viscosity. No processing data from a production injection molding machine are supplied in the generic 3135XZ datasheet; machine-specific trials are required.
Addition of 3 wt% to 5 wt% to paraffin wax raises melt viscosity and improves flexibility of wax-based coatings. The blending temperature is typically 120°C to 140°C, and agitation should be maintained until the resin is fully dissolved. In hot-melt adhesive formulations, 3135XZ is mixed with rosin ester or hydrocarbon tackifiers at 160°C to 180°C; the high melt viscosity limits application to slot-die or bead coating rather than spiral spray systems. Peel strength evaluated by ASTM D1876 on corona-treated polyethylene increases with tackifier content up to a formulation-dependent plateau; published data for the exact XZ suffix are limited, so each formulation must be validated on the target substrate.
When 3135XZ is compounded with rosin ester tackifiers and paraffin wax, the low vinyl acetate content reduces solubility in low-molecular-weight wax relative to higher-VA grades. This can create a viscosity plateau and, above a formulation-specific tackifier threshold, phase separation on cooling. Mixing temperature should remain below 180°C for extended hold times to avoid deacetylation; thermal aging at 180°C for 24 h under ASTM D4499 is used to assess hot-melt stability. The resin contributes cohesive strength to the cooled adhesive, but tack to polar surfaces is lower than with 18 wt% or 28 wt% VA grades. For polypropylene substrates, flame or plasma treatment to 40 dyn/cm to 50 dyn/cm is required to shift failure mode from adhesive to cohesive.
In polymer modification, addition of 2 wt% to 5 wt% to high-density polyethylene can improve environmental stress-cracking resistance, but the exact property change must be measured by ASTM D1693. Because 3135XZ has a lower melt index than many EVA wax-modifier grades, it is less efficient at reducing compounding torque and should not be used as a low-viscosity processing aid. In crosslinked EVA foam, chemical blowing agents such as azodicarbonamide at 1 wt% to 2 wt% can be used; the low melt index provides cell wall strength during expansion, but the decomposition temperature of the blowing agent must be matched to the cure system. Published data for the exact XZ suffix in foam processes are limited.
Outdoor exposure of unstabilized EVA causes surface chalking and loss of tensile elongation. Evaluation by ASTM D4329 for UV exposure and ASTM D638 for tensile properties should be performed for applications exposed to sunlight. The resin should not be blended with amine-based additives because basic species accelerate deacetylation and can promote acetic acid release, corrosion, and yellowing. Chlorinated solvents and strong oxidizing agents should not be used for purging or cleaning surfaces intended for the melt. When regrind is reintroduced at levels above 20 wt%, melt viscosity, gel count, and color shift should be measured on the first article; published data for the exact XZ suffix are limited.
Compliance with food-contact regulations is valid only when the finished article is tested under the intended use condition. FDA 21 CFR 177.1350 covers EVA copolymers in contact with food; the base resin may be referenced in supplier food-contact declarations, but extraction limits for the final film or coating must be established. EU Regulation (EU) No 10/2011 requires migration testing with food simulants specified in Annex III and Annex V. RoHS Directive 2011/65/EU compliance for electrical and electronic applications requires confirmation that no restricted substances exceed the maximum concentration values. REACH Regulation (EC) No 1907/2006 status for the polymer itself and any residual monomer should be confirmed through the safety data sheet.
| Regulatory reference | Scope | Status basis for ELVAX 3135XZ |
|---|---|---|
| FDA 21 CFR 177.1350 | Ethylene-vinyl acetate copolymers in food-contact coatings and films | Base resin composition reported to comply; final article extraction limits must be established |
| EU Regulation (EU) No 10/2011 | Plastic materials and articles intended to come into contact with food | Compliance depends on final migration testing with simulants specified in Annex III and Annex V |
| RoHS Directive 2011/65/EU | Restriction of hazardous substances in electrical and electronic equipment | No intentional addition of Pb, Cd, Hg, Cr(VI), PBB, or PBDE; supplier declaration should be obtained |
| REACH Regulation (EC) No 1907/2006 | Registration, evaluation, authorisation, and restriction of chemical substances | Polymer exemption may apply; monomer and residual impurity status must be confirmed by supplier safety data sheet |
For incoming quality control, the melt index should be verified by ASTM D1238 at 190°C under 2.16 kg, and density should be verified by ASTM D792. The exact XZ suffix designation may alter surface pellet characteristics but is not expected to change the ethylene-vinyl acetate copolymer backbone. If a mismatch exists between the certificate of analysis and the generic 3135XZ datasheet, the certificate of analysis takes precedence for lot acceptance. The resin should be stored in a dry environment below 50°C, away from direct sunlight and sources of ignition.
