| HS Code | 349934 |
| Product Name | VINAVIL EVA 2601 L VAE Emulsion |
| Appearance | White milky dispersion |
| Solid Content Percent | 55 ± 1 |
| Viscosity Mpa S | 3000 ± 500 |
| Ph | 4.5 - 5.5 |
| Density G Per Cm3 | 1.06 |
| Particle Size Microns | 1 |
| Glass Transition Temperature Degc | -10 |
| Minimum Film Forming Temperature Degc | 0 |
| Stabilizer System | Polyvinyl alcohol stabilized |
| Residual Vinyl Acetate Monomer Percent | Less than 0.5 |
| Ionic Character | Nonionic |
As an accredited VINAVIL EVA 2601 L VAE Emulsion factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | VINAVIL EVA 2601 L VAE Emulsion supplied in 200 kg drums, 1000 kg IBC, or bulk. Quantity per container varies. |
| Container Loading (20′ FCL) | 20' FCL container loading: VINAVIL EVA 2601 L VAE Emulsion in drums/pails, secured and protected for safe transport. |
| Shipping | Ship VINAVIL EVA 2601 L VAE Emulsion in sealed drums, IBCs, or tankers with appropriate protective linings. Avoid extreme heat, freezing, and contamination. Maintain temperatures between 5°C and 35°C during transit. Secure upright loads and use non-slip handling equipment. Follow standard safety data sheet guidelines for spill response and ventilation. |
| Storage | Store VINAVIL EVA 2601 L VAE emulsion in original, tightly sealed containers in a cool, dry, well-ventilated area. Protect from direct sunlight, frost, and temperatures outside 5–35°C. Avoid contact with oxidizing agents and contamination. Keep containers upright and off the ground. Use within recommended shelf life, with periodic agitation if stored for extended periods. |
| Shelf Life | Store at 5–35°C, protect from freezing. Shelf life is 12 months from production date in original sealed containers. |
Wet tack development in this application is governed by the balance between water release into absorbent stock and viscosity recovery after exit from a closed applicator. The emulsion is commonly formulated at 50–65% total solids with a modified starch or dextrin solution added at 10–30 wt% to reduce cost and increase cohesive strength; pH is maintained between 4.5 and 6.0 to avoid starch retrogradation and preserve shear stability. On a transfer roller line running at 120–250 m/min, the adhesive is subjected to high shear of 10⁴–10⁵ s⁻¹ in the nip; the low-viscosity grade recovers from 400–800 mPa·s under shear to a low-shear viscosity above 2,000 mPa·s within 1–2 s, reducing penetration into high-porosity board. Adhesive film weights of 30–60 g/m² are applied to the clay-coated side, and lamination is completed with nip pressures of 40–100 N/cm. Immediate green bond must support peel stresses at the delivery stack without sheet separation; fiber tear on 280 g/m² SBS board is typically specified at greater than 90% after 30 min. For food-contact applications, the dried adhesive complies with FDA 21 CFR 175.105 and, when used as a component of paperboard, falls under FDA 21 CFR 176.170; confirm whether the specific lot is manufactured without alkylphenol ethoxylates and with formaldehyde content below the 0.1% labeling threshold. Blocking resistance is assessed by compression at 40°C and 75% RH for 24 h under 0.03 MPa; blocking ratings above 3 on a 1–5 scale indicate insufficient surface hardness.
| Downstream segment | Governing standard or regulation | Test method | Binder-related parameter monitored |
|---|---|---|---|
| Wood assembly | EN 204:2016, EN 205:2016 | Lap shear after dry and water soak | Shear strength retention, fiber tear percentage |
| Paperboard lamination | FDA 21 CFR 175.105, FDA 21 CFR 176.170 | Fiber tear, blocking resistance | Wet tack recovery, pH, adhesive film weight |
| Tile adhesive | EN 12004:2007+A1:2012, EN 1348:2007 | Tensile pull-off after water, heat, freeze–thaw | Polymer/cement ratio, pot life, tensile retention |
| Architectural primer | ISO 11890-2:2020, ISO 4624:2016 | VOC content, pull-off adhesion | MFFT, binder loading, pH |
| Nonwoven binder | ISO 9073-3:2019, OEKO-TEX Standard 100 | Dry tensile, formaldehyde limit | Binder add-on, crosslinker level, drying profile |
| Heat-seal coating | ASTM F88/F88M, ASTM F1921/F1921M-13 | Seal strength and hot tack | Coating weight, seal initiation temperature, pH |
In two-component cementitious tile adhesives and self-leveling underlayments, the emulsion is diluted with mixing water at a ratio of 1:1 to 1:3 by volume, producing a polymer solids/cement ratio of 0.05–0.15 by mass. High-shear mixing at 600 rpm for 3–5 min with a dual-paddle mixer disperses the polymer without entraining air; defoamer addition at 0.1–0.2 wt% on total liquid is routine because the surfactant system generates stable foam under alkaline conditions. The wet mortar typically maintains a pot life of 2–4 h at 20°C before viscosity rise indicates polymer/cement interaction. Adhesion to glazed ceramic and porcelain tiles is tested by EN 1348:2007 pull-out; C2 classification under EN 12004:2007+A1:2012 imposes minimum tensile adhesion values of 1.0 N/mm² after standard, water immersion, heat aging, and freeze–thaw conditioning. The ethylene comonomer content in the VAE structure improves resistance to alkaline hydrolysis relative to a vinyl acetate homopolymer, but continuous wet exposure at pH above 13 still degrades tensile retention after 56 days; acceptable retention limits are typically set at 60–80% of the initial value depending on the specifier. Drying shrinkage and crack bridging in thin-bed applications are process-sensitive; the mixed mortar should be used only after a full-scale trial on the specified substrate because batch-to-batch cement alkali content shifts the film-formation pH. Aluminous cements and rapid-hardening calcium sulfoaluminate binders may coagulate the dispersion due to polyvalent ion release; jar tests with cement filtrate are mandatory before bulk mixing.
Architectural primer evaluation begins with a determination of minimum film formation temperature under ISO 2115:1996; the value near 0°C allows coalescent-free or low-coalescent formulations with VOC content below 10 g/L by ISO 11890-2:2020. A typical interior primer uses 15–25 wt% wet binder, 20–30 wt% titanium dioxide slurry, 10–15 wt% calcined clay, and 0.2–0.5 wt% associative thickener. Dispersion is accomplished in a Cowles high-speed disperser at 1,200–2,000 rpm for 20–30 min, followed by let-down at 300–600 rpm to avoid shear-induced destabilization. pH is adjusted to 8.0–9.0 with ammonia or 2-amino-2-methyl-1-propanol. Adhesion to aged alkyd surfaces is measured by pull-off per ISO 4624:2016; failure within the primer at values above 1.0 MPa is generally acceptable for interior repaint. The grade is not formulated for exterior exposure; ultraviolet radiation and extended wet cycles hydrolyze the vinyl acetate units and reduce wet adhesion on masonry. Zinc oxide and amine-functional dispersants that raise pH above 9.5 should be avoided because they destabilize the dispersion and promote viscosity drift.Spray application onto moving nonwoven webs exposes the binder to high shear at nozzle orifices; the low-viscosity grade is suited to hydraulic or rotary atomizers operating at 30–80 bar, where Sauter mean droplet diameters of 40–80 µm are targeted to limit over-penetration and binder dust. The emulsion is diluted to 20–35% solids with deionized water for saturation bonding; for high-wet-strength grades, 0.5–2.0 wt% of a melamine-formaldehyde or glyoxal-based crosslinker is added, along with 0.3–0.8 wt% of a blocked acid catalyst. Dry add-on ranges from 8–20 wt% for wipe substrates to 20–35 wt% for filtration media. Through-air drying at 120–150°C for 2–5 min removes water and activates crosslinking; web tensile strength is measured by ISO 9073-3:2019, and wet tensile retention is often specified at 50–80% of dry tensile after 1 h water immersion. Yellowing after heat aging at 150°C for 5 min is measured as ΔYI under ASTM E313-20; values above 3 restrict use in visibly white substrates. Formaldehyde-sensitive applications require validation against OEKO-TEX Standard 100 Annex 4 limits and GB 18401-2010 Class A infant thresholds, because crosslinker selection directly controls free and releasable formaldehyde.
When applied to aluminium foil, corona-treated polyethylene terephthalate, or siliconised release paper at dry coating weights below 8 g/m², the limiting variable is wet-out and film continuity in gravure cells. The coating is usually adjusted to 30–40% solids with a weakly pseudoplastic flow index above 0.85; gravure cylinder engraving of 80–120 lines/cm with a cell volume of 20–35 cm³/m² controls deposit uniformity. Drying is conducted in forced-air ovens at 80–120°C, with web surface temperature held at 60–90°C to avoid premature coalescence defects. Seal initiation occurs between 65°C and 85°C at 0.3 MPa jaw pressure and 0.5 s dwell; heat-seal strength is measured on a tensile tester at 300 mm/min jaw separation according to ASTM F88/F88M, and hot tack is evaluated with ASTM F1921/F1921M-13. End-use approval for food lidding requires the coating to comply with FDA 21 CFR 175.105 as an adhesive component. The coating is not retortable; sustained contact with water above 90°C softens and hydrolyzes the vinyl acetate segments, resulting in seal strength loss greater than 50%.
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VINAVIL EVA 2601 L VAE Emulsion is a waterborne anionic dispersion of a vinyl acetate–ethylene copolymer. The product is manufactured by Vinavil S.p.A. and is positioned as a general-purpose VAE grade for adhesive and coating formulations where plasticizer-free flexibility, low-temperature film formation, and adhesion to cellulosic and selected polymer films are required. The ethylene comonomer content modifies the glass transition of the vinyl acetate backbone, yielding a softer film than a polyvinyl acetate homopolymer without external plasticizer addition. The dispersion is supplied as a white to off-white liquid with a pH controlled in the acidic range and a solids content typical of industrial VAE grades.
The product’s specification envelope is determined by standard methods. Table 1 presents representative values from the manufacturer’s current technical data sheet; batch certificates may list tighter or shifted limits. Values for residual monomer are not restated here because published data for this specific configuration is limited.
| Property | Method | Typical range |
|---|---|---|
| Non-volatile content | ISO 3251 (105 °C, 2 h) | 54–56% by mass |
| pH | ISO 976 | 4.5–6.5 at 25 °C |
| Brookfield viscosity | ISO 2555, spindle 4, 20 rpm | 2500–4500 mPa·s |
| Density | ISO 2811 | 1.05–1.08 g/cm³ |
| Minimum film-forming temperature | ISO 2115 | ≤0 °C typical |
| Particle size | ISO 22412 | 0.5–1.0 μm |
The grade is used in packaging adhesives, paper-to-board lamination, PVC film lamination, wood assembly, and general bonding where medium to high wet tack and clean machine runnability are required. The principal differentiation from polyvinyl acetate homopolymer emulsions is the internal plasticization generated by ethylene, which lowers minimum film-forming temperature and reduces the need for coalescing solvents or external plasticizers. Compared with styrene-acrylic or pure acrylic dispersions of similar solids, this VAE grade typically provides a different balance of adhesion to low-energy polyethylene and polyester surfaces, water resistance, and UV yellowing resistance.
When a VAE emulsion replaces a PVAc homopolymer in laminating adhesives, the most significant change is the shift in glass transition and film-forming behaviour. A conventional PVAc homopolymer exhibits a glass transition temperature above room temperature and requires external plasticizer or coalescing solvent to form a coherent film at ambient conditions. The ethylene segments in VINAVIL EVA 2601 L depress the glass transition temperature and the minimum film-forming temperature; the manufacturer’s technical data sheet lists a minimum film-forming temperature at or below 0 °C, while PVAc homopolymers commonly require a coalescing package to reduce MFFT from the range of 15–18 °C. The VAE film is therefore flexible at refrigeration temperatures, which is relevant for frozen-food packaging adhesives.
The lack of a fugitive plasticizer also improves long-term bond stability. In PVAc systems plasticized with dibutyl phthalate or similar, migration of the plasticizer into the adhered substrate can cause embrittlement and bond loss. In VINAVIL EVA 2601 L, flexibility is covalently incorporated into the polymer chain. The product still contains vinyl acetate units, so alkali hydrolysis resistance is not as high as that of an all-acrylic dispersion; however, the ethylene comonomer reduces the density of acetate side groups and generally improves hydrolytic stability relative to PVAc homopolymer.
Table 2 compares the general property profile of VINAVIL EVA 2601 L with a plasticized PVAc homopolymer and a general-purpose acrylic dispersion. The values are directional ranges and do not replace end-use adhesion testing.
| Property | VINAVIL EVA 2601 L | Plasticized PVAc homopolymer | General-purpose acrylic dispersion |
|---|---|---|---|
| Glass transition, DSC onset | −5 °C typical | 28–33 °C before plasticizer | −20 to +30 °C grade dependent |
| Minimum film-forming temperature | 0 °C | 15–18 °C before coalescent | variable |
| External plasticizer requirement | none for ambient film formation | often 5–15% dibutyl phthalate or equivalent | none for ambient film formation |
| Adhesion to untreated LDPE | moderate | low | moderate to high |
| Water resistance after 24 h immersion | moderate | fair | high |
| UV yellowing resistance | moderate | moderate | high |
During high-speed application on roller coaters, the apparent viscosity of VINAVIL EVA 2601 L is measured at low shear as 2500–4500 mPa·s according to ISO 2555, spindle 4, 20 rpm at 25 °C. The dispersion is pseudoplastic; apparent viscosity decreases under the shear rates generated between doctor rolls and application rolls. This shear-thinning character supports transfer to board and paper substrates without excessive misting, although the actual misting tendency depends on roll speed, gap settings, and the presence of defoamers or wetting agents. Published data for misting at line speeds above 120 m/min for this specific grade is limited.
Wet tack and open time are governed by the balance between water evaporation and surface absorption into the substrate. On clay-coated board, the emulsion’s relatively fine particle size distribution, typically in the 0.5–1.0 μm range by ISO 22412, promotes rapid penetration into the coating layer while retaining sufficient colloidal stability to avoid premature coagulation. Formulators often adjust open time with cellulose ethers, polyvinyl alcohol, or dispersible fumed silica. Because the base emulsion is stabilized with a protective colloid system, addition of borate salts can induce gelation and should be avoided unless compatibility has been validated.
The limiting factors are usually drying capacity, substrate heat sensitivity, and the development of wet tack sufficient to hold the web after the nip. The dispersion is applied at a typical coating weight of 20–50 g/m² wet, depending on board porosity. At higher line speeds, the drying section must remove water and residual volatile compounds; the product is a water-based dispersion with a solids content of approximately 55%, so roughly 45% of the applied wet mass is water. Infrared or hot-air drying units must supply enough energy without exceeding a web surface temperature that would cause film skinning or blocking. Skin-over formation can trap water and reduce final bond strength.
Rheological control under recirculation is important. In open sump and tray systems, the emulsion experiences repeated low-shear and high-shear cycles; mechanical stability is sufficient for standard circulation but prolonged high-shear pumping with a piston pump or high-speed dispersion blade can generate foam and increase coagulum. A filter bag of 100–250 μm mesh is often installed before the applicator head. The product’s low-shear viscosity allows clean transfer, while the high-shear viscosity is low enough to permit metering; however, formulators must validate viscosity after addition of plasticizers, humectants, or thickeners because some additives raise the high-shear viscosity and cause starved transfer.
In woodworking and construction adhesive applications, VINAVIL EVA 2601 L can be formulated as a base polymer for cold-press and hot-press wood bonding. The low minimum film-forming temperature permits use in unheated workshops, provided the adhesive film is protected from frost until fully dried. Formulations are tested against DIN EN 204 for bond durability classes; the base emulsion alone does not confer a durability classification. Crosslinking with isocyanates or other water-compatible hardeners may be required to reach D3 or higher water-resistant grades. The selection of hardener must be made with attention to the acidic pH of the emulsion, typically 4.5–6.5, which affects the pot life of isocyanate-functional crosslinkers.
For PVC film lamination, the VAE polymer provides adhesion to plasticized polyvinyl chloride and cellulosic substrates without high levels of volatile solvents. Plasticizer migration from the PVC film may soften the adhesive; because the VAE film is already internally plasticized, the relative change in hardness is often smaller than in a rigid PVAc homopolymer. However, large plasticizer concentrations above 30 phr in the PVC film may still reduce creep resistance. Testing under load at 23 °C and 50% RH is recommended.
The product is an anionic dispersion. Coagulation can occur if it is mixed with cationic materials or with high levels of multivalent cations such as calcium, magnesium, or aluminium. The dispersion should be stored at 5–30 °C and protected from freezing; one freeze-thaw cycle may produce irreversible grit formation because the polymer particles coalesce upon ice crystal formation. If frozen, the material is generally not recoverable by thawing and agitation. Storage in stainless steel, plastic, or internally coated mild steel is typical. Contact with copper, brass, or unprotected iron can cause discoloration or metal ion contamination.
The pH of the emulsion is adjusted to the acidic range for colloidal and microbiological stability. Prolonged exposure to alkaline conditions, especially above pH 9, can promote hydrolysis of the vinyl acetate units and increase the release of acetic acid, which further lowers pH. Conversely, addition of strong acids below pH 2 may destabilize the protective colloid. The product is typically preserved against microbial growth, but opened containers and diluted batches should be checked for bacterial or fungal contamination. Biocide top-up must be compatible with the anionic dispersion and must not introduce cationic active agents.
Regulatory compliance statements are contingent on the complete formulation and the intended market. The emulsion may be used in packaging adhesive formulations intended for indirect food contact under FDA 21 CFR 175.105, provided the finished adhesive meets the migration and extraction limitations applicable to the specific food type and packaging construction. For European Union applications, the product must be evaluated within the manufacturer’s REACH registration and the downstream user’s obligations. The product is not a food-contact article by itself.
Foam generation in high-shear roller coaters is a production bottleneck if the emulsion is formulated with excessive low-molecular-weight surfactants or if the return line entrains air. Defoamer selection should be based on a high-shear foam test and a roller transfer test, not only on bottle shaking. Silicone-based defoamers are effective at low concentrations, often 0.1–0.5% by weight, but may cause fisheyes on non-porous substrates. Mineral-oil defoamers are less efficient but generally produce fewer surface defects. The emulsion has moderate mechanical stability; in a Cowles disperser at 3000 rpm, the temperature should be kept below 40 °C to avoid thermal destabilization.
Filtration and cleanup procedures affect batch-to-batch yield. Coagulum can accumulate on doctor rolls and in the recirculation pump, particularly where the film dries on metal surfaces. Warm water is usually sufficient before the film fully cures; after film formation, ethyl acetate or acetone may be required for clean-up, but these solvents should not be introduced into the emulsion. Equipment cleaning procedures should be validated to avoid solvent residues that destabilize the next batch. Published data for specific cleaning solvent combinations with this grade is limited.
Drying air temperature and web speed must be balanced against the blocking resistance of the formed film. If the drying section drives the surface temperature above the blocking point of the VAE film, the coated board can stick to contact rolls after the dryer. A typical initial drying condition is warm air at 60–80 °C with web surface temperature maintained below 45 °C, followed by forced cooling before stacking. These values are process recommendations, not product specifications, and must be verified on the specific coating line because oven geometry, air velocity, and exhaust humidity shift the effective drying rate. In high-humidity environments above 60% RH, additional dwell time or preheated substrate may be required to prevent trapped moisture at the bond line.
