| HS Code | 686500 |
| Product Name | Vinavil 160 |
| Chemical Base | Polyvinyl acetate (PVAc) aqueous dispersion |
| Appearance | White viscous liquid; dried film is clear |
| Solids Content | Approximately 50% |
| Viscosity | Approximately 8,000–12,000 mPa·s (Brookfield) |
| Ph | Approximately 4.5–5.5 |
| Density | Approximately 1.10 g/cm³ |
| Application Temperature | Minimum +10 °C |
| Open Time | About 5–10 minutes |
| Setting Time | About 15–20 minutes depending on conditions |
| Solvent Content | Solvent-free |
| Storage Life | 12 months in original sealed container, store at 5–30 °C, protect from frost |
As an accredited Vinavil 160 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Vinavil 160 is supplied in 25 kg multi-layer paper bags with an inner polyethylene liner, sealed and palletized. |
| Container Loading (20′ FCL) | Container Loading (20′ FCL): Vinavil 160 packed in 25-kg bags on pallets, shrink-wrapped and securely stowed in one 20-foot container. |
| Shipping | Vinavil 160 is a water-based vinyl acetate-ethylene (VAE) copolymer emulsion shipped in drums, IBCs, or bulk tankers. It is non-hazardous for transport under ADR, IMDG, and IATA regulations, requiring no special hazard labeling. Protect from freezing, keep above 5°C, and prevent skin or eye contact. |
| Storage | Store Vinavil 160 in its original, tightly sealed containers in a cool, dry, and well-ventilated area, away from direct sunlight and frost. Recommended storage temperature is between 5°C and 30°C; do not allow to freeze. Under proper conditions, shelf life is approximately 12 months from production date. Stir gently before use. |
| Shelf Life | Shelf life for Vinavil 160 is typically 12 months from manufacture when stored sealed, protected from frost and extreme heat. |
Vinavil 160 is handled as a plasticizer-free aqueous polyvinyl acetate homopolymer dispersion, stabilised with a polyvinyl-alcohol protective colloid, and is supplied at a non-volatile content of 54–56 wt%. In cold-press wood lamination, the material is applied through a roll coater at 120–180 g/m² per open joint face. The production fluid is maintained at 18–28 °C; at temperatures below 15 °C the dispersion exhibits a rapid viscosity increase that disturbs metering-gap uniformity on transfer rollers. A typical mixing procedure charges 100 parts of Vinavil 160 into a stainless-steel dosing tank, adds 3–6 parts deionized water to reach 6,000–9,000 mPa·s Brookfield viscosity, then incorporates 0.2–0.5 part of a non-ionic defoamer under slow propeller agitation. Where the substrate is planed softwood with surface roughness Ra 3–6 µm, 5–12 parts of a 45 wt% calcium carbonate slurry is added to control penetration into open tracheids and to increase squeeze-out body. Open assembly time is limited to 180 s; beyond 240 s, the wet film skins and the resulting bond fails cohesively in the adhesive under ASTM D905-03 compressive shear testing. Press parameters for spruce-to-spruce panels are 0.7–1.0 MPa for 15–30 min at room temperature; high-frequency heating shortens the cure to 90–120 s but requires the joint to be free of ionic salts above 0.5 wt% to avoid dielectric breakdown. Wood moisture content is held between 8 wt% and 12 wt%; below 8 wt% water from the dispersion is absorbed into the substrate and the film does not coalesce, while above 12 wt% water vapour trapped in the bond line can produce voiding and a loss of wet shear strength. Finished articles are interior furniture frames, laminated beams, and edge-glued panels intended for dry service only; the homopolymer does not achieve load-bearing durability under EN 204 D3 wet exposure unless a crosslinking additive is post-added.
| Variable | Controlled range | Failure mode outside range | Test method / check |
|---|---|---|---|
| Non-volatile content | 54–56 wt% | Shrinkage voids and low compressive shear | ISO 3251:2019 |
| Brookfield viscosity at 25 °C | 6,000–9,000 mPa·s | Metering starvation or stringing | ISO 2555:2018 |
| Water dilution | 3–6 parts per 100 parts dispersion | Set time extends beyond press cycle | Plant viscosity record |
| Calcium carbonate slurry 45 wt% | 5–12 parts | Hard, brittle bond; tool wear | Ash content and squeeze-out evaluation |
| Open assembly time | ≤ 180 s | Surface skin and cohesive failure under ASTM D905-03 | ASTM D905-03 |
| Press pressure | 0.7–1.0 MPa | Low: poor contact; high: starved joint | Line pressure gauge |
| Wood moisture | 8–12 wt% | Below: dry film; above: voids and wet shear loss | EN 13183-2:2002 |
On clay-coated solid bleached sulphate board, wet tack is governed less by adhesive solids than by surface pH and porosity of the mineral coating. Vinavil 160 shows emulsion destabilisation when the coating pH exceeds 8.5, because the calcium carbonate-buffered surface releases calcium ions that interact with the anionic protective colloid. For side-seam gluing at linear speeds of 80–150 m/min, the formulation is trimmed with 4–8 parts deionized water and 2–4 parts of a 45 wt% rosin ester or hydrocarbon tackifier dispersion to lengthen aggressive tack without solvents. The glue wheel gap is set to deposit 70–110 g/m² on the narrower tab. Wheel speed is biased 10–15% below line speed to avoid fibre tear and misting. When the converted carton is frozen to -20 °C, the homopolymer film is brittle at the crease; replacing 15–25 parts of Vinavil 160 with a vinyl acetate-ethylene dispersion of 0 °C glass transition temperature restores crease integrity but reduces initial tack, so the addition must be validated against machine-side bonding at 30 °C. The coating layer’s pore size distribution controls the rate of aqueous vehicle removal; a board with air permeance above 0.5 µm/Pa·s pulls water too quickly and freezes the adhesive before the nip. Converters should condition board at 23 °C and 50% RH for 24 h before side-seam trials. The finished glue seam is checked for fibre tear on aged stock after 24 h; a margin below 80% fibre tear indicates the adhesive film is stronger than the substrate but the wetting was incomplete. Water absorptiveness of the board is characterised under ISO 535:2023 before lot release. For indirect food packaging, the converter must verify the grade against 21 CFR 175.105 and EU Regulation 10/2011 before use.
Spiral tube winding imposes a shear-rate ramp from 10⁴ s⁻¹ at the glue roll to near-zero stress in the open wound lap. The glue tray is jacketed at 30–40 °C to keep viscosity at 2,500–3,500 mPa·s. The applicator deposits 60–90 g/m² onto the innermost ply; the winding mandrel heated to 50–70 °C drives water removal through the outermost paper plies within 20–40 s. At line speeds above 120 m/min the residence time at the nip is less than 0.3 s, and intermittent starved laps may appear unless the metering gap is reduced by 15–20%. Use of 1–2 parts propylene glycol extends open time but increases equilibrium moisture uptake of the finished core. Cores are conditioned at 23 °C and 50% RH for 24 h before flat crush testing under ISO 11093-9; residual moisture above 10 wt% in the core wall is associated with a loss of radial crush strength. The failure mode in spiral tube winding is not cohesive film tearing but paper delamination; therefore the adhesive must penetrate only 10–20 µm into the substrate to avoid paper swelling. Published data for this specific converting configuration is limited, but the critical processing boundary is the skinning time under heated mandrel conditions.
For interior wall primers containing Vinavil 160, the upper PVC boundary of 75% is driven by wet-scrub resistance under ISO 11998. The formula is assembled by grinding titanium dioxide, 2–5 µm calcium carbonate, a cellulosic thickener, and a phosphate dispersant at pH 7.5–8.5, then letting down with the PVAc dispersion to 12–18 wt% dispersion solids on total wet paint. If the mill base pH exceeds 8.5, the PVAc ester groups hydrolyse on extended storage, releasing acetic acid and causing viscosity drift. Final pH is adjusted with ammonia to 8.0–9.0, never above 9.5. Shelf-stable batching requires 0.2–0.5 wt% of an isothiazolinone biocide in aqueous formulations stored above 30 °C. The film is dried at 23 °C and 50% RH for 28 days before wet-scrub testing; early testing at 7 days underestimates film consolidation because the PVAc film continues to develop mechanical integrity as residual coalescing water leaves the film. On gypsum board with surface alkalinity pH 10, a solvent-free styrene-acrylic barrier primer is required before the PVAc finish; direct application may cause brown discolouration from tannin or paper facer bleed. The primer is not for exterior masonry or green concrete above 4 wt% moisture content.
High-loft polyester wadding sprayed with Vinavil 160 requires a working viscosity of 150–400 mPa·s, achieved by diluting 10–20 parts water. The spray system uses air-assisted nozzles at atomising air pressure 0.2–0.5 MPa; droplet size must be above 50 µm to avoid aerosol drift. Deposit mass is 8–18 g/m² on a dry-fibre basis. The wet web is conveyed through a gas-fired oven with a residence time of 120–180 s at 130–150 °C. The homopolymer does not self-crosslink; where wash resistance is specified, 0.5–1.5 wt% of a glyoxal-based crosslinker is post-added, and the cure temperature must reach 150 °C for 3 min or the crosslink density remains below the detectable change in solvent swelling measured by ASTM D2765. Tensile strength of the finished nonwoven is dominated by fibre entanglement; the binder contributes only 10–20% of the measured machine-direction tensile value under ISO 9073-3. At add-on above 25 g/m², the hand becomes papery and drape fails. The acidic dispersion is not suited to cotton card webs containing residual alkali from bleaching; a compatibility jar test at 1:10 dilution is used before bulk handling.
At the perfect-binding line, the dispersion is held at 20–30 °C and 3,000–5,000 mPa·s viscosity. The milled spine is coated at 250–350 g/m² using a heated wheel or roller pot; for uncoated text stock the adhesive wets the exposed fibres without primer, but for UV-cured or aqueous-coated covers 2–3 parts of a silane adhesion promoter are added per 100 parts dispersion. The cover is nipped within 5–10 s at 0.2–0.4 MPa; the bond reaches green strength after 10–20 s. Page-pull strength under ISO 19594:2017 is typically governed by paper internal bond rather than the adhesive film, but film thickness below 150 µm on the spine can create starved bonds. Ageing at 40 °C and 85% RH for 14 days reduces page-pull by 20–30% because PVAc absorbs water and plasticises. The open time at the application station must be below 30 s; beyond this, skins form and the cover adhesion becomes intermittent. For lay-flat bindings, the homopolymer is too stiff and a VAE-modified formulation is used.
Competitive Vinavil 160 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!
Vinavil 160 is supplied by Vinavil S.p.A. as a polyvinyl alcohol-stabilized polyvinyl acetate homopolymer aqueous dispersion without added plasticizer. Manufacturer-published typical values include solids content 59 ± 1% measured by ISO 3251, Brookfield viscosity 4,000–7,000 mPa·s at 25°C and 20 rpm measured by ISO 2555, pH 4.0–6.0 measured by ISO 976, and density 1.08 g/cm³ at 23°C measured by ISO 2811. The product is used in assembly bonding of wood, lamination of paper and board, bag converting, and bookbinding where DIN EN 204 class D2 moisture resistance is sufficient. Because no plasticizer is added, dried films retain higher hardness and lower migration into absorbent substrates than plasticized polyvinyl acetate dispersions; relative to vinyl acetate–ethylene copolymer dispersions, the homopolymer exhibits higher glass transition temperature and lower cold-flexibility. Vinavil 160 is not intended as a structural adhesive and should not be specified for load-bearing joints requiring exterior durability or DIN EN 204 classes D3 or D4 unless an appropriate crosslinking system is validated.
The DIN EN 204 standard classifies non-structural wood adhesives by moisture conditions of service: D1 covers dry interior use, D2 covers interior use with occasional short-term water exposure, and D3 covers interior use with frequent short-term water exposure. Vinavil 160 is positioned for D2-class assembly operations because the unmodified polyvinyl alcohol-stabilized homopolymer does not provide the water resistance required for D3. Paper and board applications are typically assessed by internal dry tack, burst strength, and blocking resistance rather than by DIN EN 204 wood-bond classes.
Film formation follows the aqueous dispersion mechanism of water evaporation, particle packing, and interdiffusion across particle boundaries. The minimum film-forming temperature of 18°C is therefore not only a drying threshold; below that temperature, particle deformation is insufficient and the film remains opaque and mechanically weak. This limitation is relevant in paper lamination and wood assembly when line temperatures in cold warehouses fall below 15°C.
The low-shear viscosity of 4,000–7,000 mPa·s is a release value under specified spindle conditions and does not represent high-shear transfer behavior in a metering gap. On rubber-roll and blade-metered coaters, shear forces reduce apparent viscosity; the low-shear value nevertheless correlates with anti-sling behavior and resistance to excessive misting on fast production lines. Published high-shear viscosity data for this specific grade is limited, so a cone-and-plate measurement at 1,000 s⁻¹ and 25°C is a more relevant in-house specification than the low-shear release value. The polyvinyl alcohol-stabilized dispersion is shear-thinning, and its resistance to penetration into porous substrates is one reason it is selected for chipboard and recycled board. A wet film of 80–120 g/m² is commonly targeted for paper lamination and wood bonding, while bag converting may use 60–90 g/m² depending on board porosity. If the applied film falls below 50 g/m² on high-absorbency chipboard, strike-through can appear before wet tack develops. Conversely, exceeding 200 g/m² on low-absorbency film-to-paper structures can extend drying time and produce blocking after rewinding. The glass transition temperature of 33°C is high enough to give dry film rigidity at ordinary room temperature, but it also means that film formation below the minimum film-forming temperature of 18°C results in incomplete particle coalescence and a powdery, discontinuous film.
| Property | Typical value | Test method |
|---|---|---|
| Appearance | White viscous dispersion | Visual inspection |
| Solids content | 59 ± 1% | ISO 3251 |
| Brookfield viscosity | 4,000–7,000 mPa·s at 25°C, 20 rpm | ISO 2555 |
| pH | 4.0–6.0 | ISO 976 |
| Density | 1.08 g/cm³ at 23°C | ISO 2811 |
| Minimum film-forming temperature | 18°C | ISO 2115 |
| Glass transition temperature | 33°C | ISO 11357-2 |
On production-scale cold-press wood assembly lines, the product is transferred by rubber-roll spreader or manual roller. Typical adhesive spread values are 120–180 g/m² for softwood lumber and 150–200 g/m² for hardwood. Substrate moisture content should be held between 8% and 12%; above 15%, water transport out of the bond line slows, the film can be diluted at the interface, and cohesive strength development may be insufficient for the specified DIN EN 204 D2 classification. Pressing at 0.5–1.0 N/mm² for 10–20 min at 20°C is typically sufficient for water removal and film coalescence. For heated press sections, a platen temperature of 50–70°C can reduce press time to 3–5 min, but open time before pressing should not exceed 5–8 min at 20°C and 60% RH, otherwise skin-over may prevent adequate transfer to the second substrate. Standard beech assemblies bonded under these conditions are used to evaluate D2 classification under DIN EN 204; the classification is based on shear strength after specified climatic and water-immersion sequences, not on dry strength alone.
Polyvinyl alcohol, present as the protective colloid, can complex with borate ions to form a reversible or irreversible gel network. In paper converting, borax or boric acid is sometimes used to increase viscosity in starch-based formulations; admixing such additives with Vinavil 160 can produce rapid viscosity build, localized gel domains, heavy roller-coater streaking, and transfer defects on the trailing edge of the sheet. A jar-test with the actual concentrates and target pH is therefore required before any borate-containing additive is introduced. If viscosity reduction is needed, demineralized water is preferred, but dilution above 5% by weight is generally unnecessary and may lower viscosity rapidly; dilution above 10% can create non-uniform transfer on low-absorbency substrates. Raising pH with ammonia above 6.5 may also cause viscosity drift and should be avoided unless the process has been validated. Because the dispersion is mildly acidic, continuous contact with carbon steel should be avoided; stainless steel or high-density polyethylene equipment is recommended.
Formulators sometimes add plasticizers to reduce the minimum film-forming temperature or to increase film flexibility. Such additions alter the product's plasticizer-free profile and can reduce heat resistance; any reformulation should be validated against DIN EN 204 D2 performance and the specific paper or wood substrate. Calcium carbonate or other fillers, if used at high loading, can increase viscosity and cause abrasive wear on metering rolls; pre-dispersion and a wear-limited trial are necessary. The product should not be combined with concentrated cationic coagulants unless separate compatibility testing is conducted.
On high-speed bag converting lines, the product is applied by grooved roller or extrusion-type applicator at 60–90 g/m². The high low-shear viscosity reduces strike-through and allows immediate burst strength after compression. For bookbinding side-gluing and casing-in, the viscosity is high enough to remain on the spine without running, while the polyvinyl alcohol stabilization contributes to adhesion to paper fibers and to cold-press re-bind strength. Because water loss governs early set, drying is faster on uncoated paper than on film-laminated stocks; at 25°C and 50% RH, skin-over on open surfaces can occur within 2–4 min. Published data for this specific grade in individual paper converting machines is limited, so line speed and open time should be confirmed with production stock before scale-up.
If a converter is considering substitution of a vinyl acetate–ethylene copolymer dispersion, the property differences are significant. Vinavil 160 has a glass transition temperature of 33°C, whereas many VAE copolymers exhibit glass transition temperatures below 0°C; the homopolymer therefore gives a harder film with greater resistance to cold-flow or creep under warm storage conditions. The trade-off is a minimum film-forming temperature of 18°C, which narrows the processing window in unheated plants. VAE copolymers can often coalesce below 5°C and retain flexibility after creasing; Vinavil 160 is more suitable for rigid wood and paper bonds where dimensional stability and heat resistance outweigh flex-crack resistance. Tensile testing of free films per ASTM D638-14 distinguishes the two classes: homopolymer films show brittle failure and lower elongation at break, while VAE films deform ductilely with higher elongation before rupture. In a hot warehouse or heated lamination line, the higher glass transition temperature reduces blocking and edge creep; in a cold packaging plant, the higher minimum film-forming temperature can make Vinavil 160 unusable without pre-warming.
Because the minimum film-forming temperature is 18°C, low-temperature application below 15°C produces discontinuous films with white hazing and reduced cohesive strength. If the line temperature is between 10°C and 15°C, pre-warm the adhesive to 18–25°C or use heated drying after application. Wood and paper substrates should also be at least 18°C before pressing. For unheated winter operations, a VAE copolymer with a lower minimum film-forming temperature may be required, but that substitution sacrifices film hardness and creep resistance at elevated temperatures.
Compared with solventborne PVAc adhesives, Vinavil 160 does not contain volatile organic solvents and does not require explosion-proof equipment in the coating area. Compared with epoxy or structural polyurethane adhesives, it does not provide structural load capacity in wet service. Compared with acrylic dispersions, it may offer different tack response and lower resistance to prolonged water exposure; selection should be based on the full service exposure and the required standard classification. Within the manufacturer’s homopolymer range, higher-viscosity grades are selected for roller application, whereas lower-viscosity grades are generally preferred for spray or jet application because of transfer and nozzle limitations.
Storage should be in sealed original containers at 5–35°C; the material is not freeze-thaw stable, and frost exposure can cause irreversible sedimentation or coagulation. Shelf life in unopened containers is typically 6 months. Equipment contact surfaces should be stainless steel or high-density polyethylene; the mildly acidic dispersion can corrode carbon steel over prolonged contact. During drying, small amounts of acetic acid may be released; extraction should be provided in ovens or heated press sections. Clean-up before film formation is accomplished with water; dried film can be softened with water if contact time is sufficient, but hardened film may require mechanical removal or solvent cleaning. Thermal exposure of dried film above 120°C should be limited because polyvinyl acetate begins to deacetylate at elevated temperatures, releasing acetic acid and causing discoloration. The product should not be combined with borax-based tackifiers, high-pH buffers above 6.5, or concentrated cationic coagulants without separate compatibility testing.
