| HS Code | 729186 |
| Product Name | Vinavil 141 |
| Chemical Type | Vinyl acetate homopolymer aqueous dispersion |
| Stabilizer | Polyvinyl alcohol |
| Appearance | White viscous liquid |
| Solid Content | 50% ± 1% |
| Viscosity | 8000-12000 mPa·s (Brookfield, 25°C) |
| Ph | 4.5-5.5 |
| Density | 1.08-1.10 g/cm³ |
| Particle Size | 1-3 μm |
| Glass Transition Temperature | Approximately 28°C |
| Minimum Film Forming Temperature | Approximately 15°C |
| Mechanical Stability | Excellent |
| Storage Stability | At least 12 months at 5-35°C |
As an accredited Vinavil 141 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Vinavil 141 is packaged in sealed 25 kg multi-layer paper bags with a polyethylene liner, ensuring safe handling and storage. |
| Container Loading (20′ FCL) | Load 20′ FCL with Vinavil 141 in sealed drums on pallets; secure tightly, protect from heat, and ensure safe handling. |
| Shipping | Vinavil 141 is a water-based vinyl acetate polymer emulsion, classified as non-hazardous for transport. Ship in sealed drums or IBC totes, preventing leakage. Protect from freezing and excessive heat; ideal storage between 5°C and 35°C. Standard dry van trailers with temperature control or insulation are recommended. |
| Storage | Store Vinavil 141 in tightly sealed original containers in a cool, dry, well-ventilated area, away from direct sunlight, heat, and ignition sources. Protect from freezing; recommended storage temperature is between 5°C and 40°C. Keep containers upright and closed when not in use to prevent contamination or skinning. Always follow the Safety Data Sheet and label instructions. |
| Shelf Life | Shelf life of Vinavil 141 is 12 months when stored properly in sealed original containers at temperatures between 5–35°C. |
VINAVIL 141 is introduced into beech and poplar assembly adhesive formulations where transfer rheology is dominated by the polyvinyl alcohol protective colloid rather than by the dispersed vinyl acetate phase. In high-speed edge gluing on panel-processing lines the adhesive film is applied at 120–180 g/m² wet film weight through chrome-plated steel rolls at 0.15–0.30 MPa nip pressure. Below 3,500 mPa·s Brookfield RVT viscosity at 20 rpm, spindle 5, the transfer roll slings off; above 8,000 mPa·s, the film splits unevenly and produces telegraphing on 0.5 mm edge banding after the 25–35 minute clamp cycle at 18–22°C. The unplasticized homopolymer dry film typically exhibits a glass transition near 33°C, which creates high stiffness but limited cold-flexibility; therefore benzoate ester plasticizer is compounded at 2–9 parts per hundred wet dispersion depending on the EN 204:2016 durability class required. At plasticizer addition above 10 phr the glass transition of the dry film falls below 10°C, and D3 cabinet door bonds exhibit cold creep under a 0.5 N/mm² sustained load when tested according to EN 205:2016 tensile shear procedures. Filler incorporation using 2 µm stearate-coated calcium carbonate at 10–15 phr reduces shrinkage cracks in high-solids joints, but above 20 phr the adhesive no longer penetrates beech vessels and D2 water-soak delamination occurs on the winter felling zone. Batch-to-batch viscosity drift in production is more pronounced when polyvinyl alcohol solution is added as a separate thickener; pre-blending the protective colloid at 10–12% solids for 30 min at 60°C before dosing into the dispersion reduces viscosity fluctuation on automated glue pots.
| Formulation condition | D1 edge gluing | D2 cold-soak | D3 boil-cycle |
|---|---|---|---|
| VINAVIL 141 wet dispersion | 100 phr | 100 phr | 100 phr |
| Polyvinyl alcohol solution, 10 wt% | 5 phr | 8 phr | 10 phr |
| Benzoate ester plasticizer | 2 phr | 6 phr | 9 phr |
| Stearate-coated calcium carbonate | 0 phr | 10 phr | 15 phr |
| Target Brookfield RVT viscosity, 20 rpm, spindle 5 | 3,500–4,500 mPa·s | 5,000–6,500 mPa·s | 6,500–8,000 mPa·s |
| Open time at 23°C, 50% RH | 6–8 min | 8–10 min | 10–12 min |
The limiting parameter on coated recycled board is the surface energy of the aqueous phase after drying, not the cohesive strength of the film. Folded carton blanks printed with UV-cured overprint varnish typically show a wetting tension below 32 mN/m; VINAVIL 141-based wet adhesives require mechanical abrasion or corona treatment to raise surface energy to 38–42 mN/m before the seam compresses. Surface wetting is confirmed by the mixed-liquids series method in ASTM D2578-23, and batch release should not proceed when the dyne level falls below 38 mN/m on the printed zone. On high-output folder-gluers running at 1,100–1,500 m/min the adhesive is delivered through 0.30–0.50 mm nozzle tips at 1.5–2.5 bar pumping pressure. Viscosity outside the 2,200–3,000 mPa·s window at 25°C causes tailing: below 2,200 mPa·s the wet deposit migrates into the score line and contaminates the delivery belt; above 3,000 mPa·s stringing at nozzle cut-off increases rework on coated, clay-filled recycled grades. Open time is intentionally kept below 6 seconds because the compression section closes 0.20–0.35 s after adhesive discharge. The seam is then radio-frequency dried at 27.12 MHz; cohesive failure in the fiber surface rather than adhesive film delamination is the accepted quality criterion after 24 h conditioning at 23°C and 50% RH when pulled under ASTM D1876-08(2023) T-peel geometry.
| Process parameter | Operating window | Failure observed outside window |
|---|---|---|
| Brookfield RVT viscosity, spindle 4, 20 rpm | 2,200–3,000 mPa·s | Nozzle stringing or score-line migration |
| Nozzle orifice diameter | 0.30–0.50 mm | Clogging or excessive deposit width |
| Pump pressure | 1.5–2.5 bar | Pulsation marks on 1.2 mm seam |
| Wetting tension of printed surface | 38–42 mN/m | Peel failure below 0.8 N/mm |
| Open time before compression | 3–6 s | Dry-bond edge lifting on folder-gluer turnover section |
Bookbinding case-making lines running VINAVIL 141 laydown adhesives require a film-forming window that does not plasticize the hinge cloth after drying. The dispersion is roll-coated at 18–22 g/m² dry film weight onto 110–135 g/m² case paper; below 18 g/m², the casing-in press at 0.4–0.6 MPa fails to force adhesive into the hinge crease, and board warp appears after the stacked case tray reaches 48°C. Above 22 g/m², moisture uptake by the binder board exceeds 9% by mass, and the case becomes concave toward the book block during forced-air drying. Block resistance testing under ASTM D907-15 shear conditions indicates that acceptable adhesion on coated stock is obtained when the bonded area retains at least 80% fiber tear after 72 h at 30°C and 65% RH. Production-scale gullotine and casing-in stations therefore monitor the substrate pH of recycled binder board; below pH 5.5, the polyvinyl acetate bond deteriorates within 6 months of library storage due to acid-catalysed polymer hydrolysis.
Re-moistening response is determined by the ratio of dextrin to VINAVIL 141 in the coating bath, and by the drying profile on the air-float dryer. A formulation containing 70–80 dry parts dextrin and 20–30 dry parts VINAVIL 141 produces a film that re-tacks in 4–8 seconds after application of 10–15 g/m² water by sponge wick. Coating weight on gummed paper is controlled at 12–20 g/m² dry film; below 12 g/m² the re-wetted tack is insufficient for automated envelope flap closing machines running at 300 cycles/min. Above 20 g/m² the film edge exudes under 35°C warehouse storage and causes blocking on ream edges. The dry film must show a water absorption rate of less than 25 g/m² in 60 s when tested according to TAPPI T 441 om-09 so that re-wetting remains confined to the coated zone. In practice, the bath is maintained at 40–45°C and pH 6.0–6.8; alkaline drift above pH 7.5 retards dextrin hydration and lengthens re-wetting time beyond the machine dwell period.
Calcium carbonate extenders are compounded into bottom-patch adhesives for multi-wall paper sacks where creep under filled-sack stacking is controlled by filler loading rather than by plasticizer level. The dispersion is thickened with a 10% pre-solution of medium-viscosity polyvinyl alcohol and loaded with 15–25 parts of 5 µm calcium carbonate per 100 parts wet dispersion. High-shear dispersion through a rotor-stator mixer at 2,000–2,500 rpm for 20–30 min is required to break filler agglomerates; otherwise the No. 3 Sheen cup viscosity remains below 8,000 mPa·s but the patch line shows micro-nodules under a 45° rake after drying. The filled adhesive is applied at 200–300 g/m² to the bottom patch zone and the sack is pressed at 0.5–0.7 MPa for 12–18 s. Bottom-patch bond strength on 70 g/m² extensible kraft is tested after 24 h; values below 2.0 N/mm width under ISO 1924-2:2008 tensile geometry indicate incomplete wet-out or filler over-loading. When filler content exceeds 30 parts, the adhesive loses tack before the patch can be aligned on the duplex sheet, and the seam fails during the 50 kg drop test used in cement and pet-food packaging.
Gypsum joint compound binders require a low-viscosity vehicle that does not destabilise when the dispersion is post-added to a 0.2 mm thin skim coat formulation. Published data for this specific dispersion in skim coat formulations is limited; however, production trials on twin-shaft kneaders with a working volume of 500 L indicate that VINAVIL 141 can be post-added at 1.5–3.0% by total compound mass if the mixture pH is held between 7.2 and 8.0. Below 1.5% addition, the dried skim coat shows microcracking at 0.2 mm thickness under ASTM C474-22 joint treatment testing; above 3.0% the open time of the wet compound extends beyond 90 min, which slows trowel smoothing and increases surface drag. The dispersion must be protected with a in-can biocide registered for use in construction additives, and the compound should be stored below 35°C to prevent protective colloid hydrolysis that raises low-shear viscosity beyond the recommended blade-coater limit of 120,000 cP.
Plasticizer selection in VINAVIL 141 wood adhesives is constrained by partition behaviour between the aqueous phase and the coalesced polyvinyl acetate film. Low-molecular-weight benzoate esters dosed at 8–10 phr produce the required D3 water-resistance after boiling cycles, but if the dry film reaches a plasticizer concentration above 12% by mass, compressive creep under 0.5 N/mm² at 50°C exceeds 2.5 mm over 7 days, which is outside the acceptance band for load-bearing furniture certification. This failure mode is detected on production lines when D3-graded laminated beams are removed from the hot press at 60–65°C; the softened adhesive allows the pva bond line to extrude under the residual spring-back of 0.8 mm thick veneer. In contrast, formulation changes that shift the glass transition upward by 2–3°C through reduced plasticizer content restore creep resistance but sacrifice film coalescence at substrate temperatures below 12°C. The practical lower limit for complete film formation on cold beech is therefore 5°C above the dispersion MFFT, and winter-shop operations below this temperature require heated nip rolls or infra-red pre-warming to prevent particulate film failure at the bond line.
Colloidal stability in multilayer paperboard lamination is assessed by shear-rate ramp tests on a cone-and-plate rheometer, because the adhesive film is subjected to air-knife shear rates above 10,000 s⁻¹ when the coating gap is set below 0.12 mm. VINAVIL 141-based laminating compounds formulated with 0.5–1.5% high-molecular-weight polyvinyl alcohol solution show shear-thinning behaviour with a low-shear viscosity of 4,000–6,000 mPa·s and a high-shear viscosity below 300 mPa·s. If the high-shear viscosity exceeds 400 mPa·s, the air-knife spit-back pattern deposits dried adhesive along the deckle edge and causes caliper variation in the re-reeler. The coating weight window is 10–15 g/m² dry increase; below 10 g/m² the re-moistened fibre bond is insufficient for the 180° flat crack opening test on 350 g/m² folding box board. Above 15 g/m², the laminated board exhibits curl because the aqueous phase penetrates the top liner more deeply than the reverse-side back liner, and the resulting differential hygroexpansion is measurable as a 5–10 mm corner lift on 700 mm sheets after 48 h at 23°C and 50% RH.
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Vinavil 141 is a solvent-free aqueous dispersion of a poly(vinyl acetate) homopolymer stabilized with poly(vinyl alcohol). The grade is supplied at 54–56 wt% solids under ISO 3251:2019, with pH 4.5–5.5 under ISO 976:2013 and Brookfield RVT viscosity of 3000–5000 mPa·s at 25 °C, spindle 4, 20 rpm under ISO 2555:2018. Density at 20 °C is 1.08–1.10 g/cm³ under ISO 2811-1:2016. The minimum film-forming temperature is 18 °C under ISO 2115:1996, and the polymer glass transition temperature is approximately 33 °C by differential scanning calorimetry. The material is used as a binder for porous substrates, particularly wood, paperboard, and remoistenable paper, where its polar PVOH-stabilized surface promotes wet-out on cellulose and lignocellulosic fibres.
| Parameter | Method | Specification |
|---|---|---|
| Solids content | ISO 3251:2019, 2 h at 105 °C | 54–56 wt% |
| pH | ISO 976:2013 | 4.5–5.5 |
| Brookfield RVT viscosity | ISO 2555:2018, spindle 4, 20 rpm, 25 °C | 3000–5000 mPa·s |
| Density | ISO 2811-1:2016 | 1.08–1.10 g/cm³ |
| Minimum film-forming temperature | ISO 2115:1996 | 18 °C |
| Glass transition temperature | DSC | 33 °C |
The specification band of 3000–5000 mPa·s at 20 rpm gives a midpoint of 4000 mPa·s and a permissible variation of ±1000 mPa·s; if a fixed-speed positive-displacement pump is used without closed-loop viscosity feedback, the low-shear delivery variation is sufficient to shift wet coating weight on a reverse gravure station. The dispersion is pseudoplastic: apparent viscosity decreases from the low-shear Brookfield value as shear rate increases in transfer lines and coating heads. Wetted parts are specified in 316L stainless steel or high-density polyethylene because the pH is acidic at 4.5–5.5. Carbon steel piping is not used. The PVOH stabilizer is thermally sensitive above approximately 45 °C; recirculation loops with centrifugal pumps operating above 1500 min⁻¹ can generate frictional heat at the impeller tip that exceeds this threshold. Slow sweep at 20–40 min⁻¹ is used after weekend shutdown to rehomogenize supernatant serum without air entrainment; air above 2 vol% in the wet film can produce pinholes after drying. Flow through 200 µm cartridge filters should be maintained below 0.3 bar differential pressure to avoid shear-induced destabilization of the poly(vinyl alcohol) stabilizer layer.
Wood bonding formulations based on Vinavil 141 are applied with roller coaters or curtain coaters at 120–180 g/m² wet add-on onto beech or oak substrates. Press conditions for softwood laminations at 0.6–0.8 N/mm² and 20–60 min are used; assemblies are conditioned according to EN 205:2016 before shear testing. The high PVOH content provides initial tack and short handling time, but unmodified films remain water-sensitive after drying. For D2 classification under EN 204:2016, the dispersion is generally used without crosslinker; for D3 wet service conditions, crosslinker addition is required and press temperature is raised above 60 °C for glyoxal-mediated cure. On production lines with radio-frequency curing, bond-line temperatures above 70 °C can accelerate crosslinking but can also cause skinning at the squeeze-out edge if ventilation is insufficient.
The transition from D2 to D3 under EN 204:2016 involves a change in failure mode after wet conditioning. In unmodified Vinavil 141 films, water uptake plasticizes the poly(vinyl alcohol) stabilizer phase and reduces tensile strength at bond lines. Formulators typically add 1–3 wt% of a glyoxal-based crosslinker or 2–5 wt% of a water-dispersible polyfunctional isocyanate on wet weight, with glyoxal preferred where pot life greater than 8 h is required. The acidic pH of the dispersion retards premature glyoxal reaction at 23 °C; gelation can occur within 4 h if pH is raised above 6.5 with ammonia. Comparative shear testing on beech under EN 205:2016 distinguishes dry strengths from wet strengths after 4 h cold water immersion; the wet strength of unmodified formulations is generally below the D3 threshold, whereas crosslinked formulations can exceed it. Published data for this specific dispersion are limited, but the classification route is well established for PVOH-stabilized poly(vinyl acetate) homopolymers. The product is incompatible with aluminium chloride above 0.1 wt%, which can precipitate the stabilizer and generate gel particles larger than 100 µm capable of blocking 200 µm nozzle filters.
Paper-to-paper and paperboard lamination uses roller coaters with wet add-ons of 20–50 g/m². Vinavil 141 can be applied through slotted nozzles of 0.3–0.5 mm on corrugated board gluing lines at 60–80 °C hot-air tunnel temperature. At the upper half of the viscosity specification, nozzle heating to 30–35 °C reduces stringing and improves cut-off on high-speed folder-gluers. The dispersion is used in side-seam gluing where open time must remain within 20–40 s at 23 °C and 50% RH; higher humidity shortens open time through reduced absorption into board. Because the product is PVOH-stabilized, it has high remoistenability and is used in envelope and label adhesives where dry film is reactivated with water at 40–60 °C. Surface energy of untreated low-density polyethylene is insufficient; corona treatment to 38–42 mN/m is required for laminates involving polyolefin films.
Because no external plasticizer is present in Vinavil 141, dry films exhibit higher hardness and lower elongation than plasticized PVAc homopolymers. König pendulum damping under ISO 1522:2022 can be used to monitor film hardness on glass; after 7 days at 23 °C and 50% RH, the film is rigid relative to vinyl acetate-ethylene copolymers with Tg below 0 °C. Tensile testing of free films under ISO 527-3:2018 records lower elongation at break than acrylic dispersions, which often exceed 300%. In T peel testing of paper-plastic laminates under ASTM D1876:2023, unmodified films may fail adhesively on untreated polyethylene; corona treatment to 38–42 mN/m surface energy is required. The absence of dibutyl phthalate or benzoate plasticizers eliminates plasticizer migration to the bond line after thermal aging at 50 °C for 14 days, a failure mode observed in plasticized poly(vinyl acetate) grades.
| Property | Vinavil 141 PVAc homopolymer | VAE copolymer dispersion | Acrylic dispersion |
|---|---|---|---|
| Glass transition temperature | 33 °C | −10 to +5 °C | −20 to +30 °C |
| Minimum film-forming temperature | 18 °C | <0 °C | 0–10 °C |
| Film hardness | high | low/moderate | moderate |
| Water resistance without crosslinker | low | moderate | moderate/high |
| Adhesion to untreated polyethylene | insufficient | moderate | moderate |
Formulating with Vinavil 141 begins with slow agitation at 100–200 min⁻¹ in a stainless steel or high-density polyethylene mixing vessel. Defoamer is added first at 0.1–0.3 wt% to control air entrainment; plasticizer-free status is maintained unless a specific flexibilizing grade is being blended. Borax or boric acid should be predispersed in water before addition because localized borate concentration above 0.2 wt% can produce gel domains through PVOH-borate complexation. Alkali-swellable thickeners require pH adjustment to 6.0–7.0 with dilute ammonia; excessive ammonia above 7.5 reduces stabilizer adsorption and can create sediment within 24 h. The dispersion should be strained through 125–250 µm filters before filling to remove coarse particles and prevent nozzle plugging in automated dispensing systems. Published data for this specific dispersion in high-speed dispersers with tip speeds above 20 m/s is limited; air entrainment rather than coagulation is the principal risk because the PVOH stabilizer is shear-stable under normal mixing.
At press speeds above 100 m/min, transfer of Vinavil 141 from anilox cells to the web depends on the shear viscosity in the wiping zone. Between 10 s⁻¹ and 1000 s⁻¹, the dispersion exhibits shear thinning; a cone-plate rheometer at 25 °C may record a viscosity drop of 60–70% across this window. Gravure cylinders with 60–100 lines/cm and cell depths of 20–40 µm deposit 4–8 g/m² dry. If the press is stopped, the PVOH stabilizer can skin in the cells; cleaning with 40 °C water within 10 min prevents insoluble skin formation. Doctor blade settings of 15–25° and 0.5–1.5 bar pressure are typical; published data for this specific configuration is limited. A viscosity drift of ±0.5 Pa·s in recirculation can alter wiped cell fill fraction and cause banding in the dry film, so viscometric control in the recirculation loop is used before the blade rather than after the reservoir.
Storage stability in sealed high-density polyethylene or 316L stainless steel at 5–35 °C is typically 6 months from production. Exposure to temperatures below 0 °C can produce irreversible coagulation. The pH should be maintained below 7.0 during thickening with alkali-swellable thickeners; raising pH above neutral reduces PVOH adsorption and can increase sediment. Isothiazolinone biocides at 0.05–0.15 wt% of total formulation are compatible, but borate salts above 0.2 wt% can cause a sharp viscosity increase through PVOH-borate complexation and should not be used without viscosity monitoring. The dispersion is not blended with high-pH ammonia solutions in concentrated form; dilute ammonia at 1–2 wt% may be used for pH adjustment only under slow agitation at 50–100 min⁻¹. Published data for this specific dispersion under cyclic thermal stress is limited, but freeze-thaw and high-pH storage are recognised operational boundaries for PVOH-stabilized poly(vinyl acetate) homopolymers.
