| HS Code | 685105 |
| Product Name | SELVOL Polyvinyl Alcohol 107 |
| Chemical Name | Poly(vinyl alcohol) |
| Cas Number | 9002-89-5 |
| Physical Form | White to off-white granular powder |
| Degree Of Hydrolysis | 98.5 - 99.5 mol% |
| Viscosity 4 Solution 20c | 5.0 - 7.0 mPa·s |
| Ph 4 Solution | 5.0 - 7.0 |
| Bulk Density | 0.50 - 0.65 g/cm³ |
| Ash Content | ≤ 0.5% |
| Volatile Matter | ≤ 5.0% |
| Molecular Weight | Approximately 31,000 |
| Melting Point | 220 - 230 °C |
| Glass Transition Temperature | 85 °C |
| Solubility | Soluble in hot water; insoluble in cold water and most organic solvents |
| Tensile Strength Of Film | Approximately 75 MPa |
| Film Appearance | Clear, flexible, and tough when dried |
As an accredited SELVOL Polyvinyl Alcohol 107 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | SELVOL Polyvinyl Alcohol 107 is a white powdered resin supplied in 25 kg multi-wall paper bags with protective inner liner. |
| Container Loading (20′ FCL) | SELVOL Polyvinyl Alcohol 107 is loaded into a 20′ FCL as palletized, sealed bags, ensuring dry, stable, contamination-free transport. |
| Shipping | SELVOL Polyvinyl Alcohol 107 is a water-soluble synthetic polymer classified as non-hazardous and non-regulated under DOT, IMDG, and ICAO. Ship as “Polyvinyl alcohol” in sealed, moisture-proof bags on pallets. Avoid exposure to humidity and dust generation. Suitable for standard truck or freight container transport. |
| Storage | Store SELVOL Polyvinyl Alcohol 107 in a cool, dry, well-ventilated area in its original, tightly sealed container. Protect from moisture, humidity, and direct sunlight. Keep away from open flames, heat sources, and oxidizing agents. Maintain stable temperatures and avoid dust accumulation to prevent static discharge and combustion hazards. |
| Shelf Life | Shelf life is typically 2 years from manufacture when stored in a sealed container in a cool, dry area. |
SELVOL 107 is a low-viscosity fully hydrolysed polyvinyl alcohol grade with a supplier-reported 4 wt% aqueous solution viscosity of 5.5–7.5 mPa·s at 20°C and hydrolysis of 98.0–98.8 mol%. Complete hydration on production lines requires jacketed mixing at 85–95°C with high-shear dispersion for 30–60 min; below 80°C, partially swollen gel particles can survive and later appear as insoluble fisheyes in coated film or sized yarn. The dried film exhibits low equilibrium moisture absorption at 50% RH, high tensile strength, and low residual cold-water solubility, which limits the application window to processes in which hot-water preparation is feasible. Operational incompatibility exists with borate-containing additives, which cause irreversible gelation, and with strongly acidic systems below pH 4.5, which promote acid-catalyzed hydrolysis during prolonged storage. The downstream boundaries below are limited to established industrial sectors where these grade parameters align with published processing windows.
Surface sizing of woodfree and recycled containerboard with a low-viscosity fully hydrolysed PVOH requires precise control of size press solids because the 4 wt% solution viscosity of SELVOL 107, 5.5–7.5 mPa·s at 20°C, produces a narrow process window between insufficient film formation and excessive starch/PVOH complex viscosity. In starch-based surface sizing formulations, SELVOL 107 is typically dosed at 0.5–2.5 parts per 100 parts dry starch or 5–20 wt% of total size solids; above 2.5 parts per 100 dry starch, the size press pickup curve plateaus and Cobb water absorption may fall below 25 g/m², risking glueability failure on subsequent converting lines. Food-contact paper and board produced with such formulations is assessed under FDA 21 CFR 176.170, ISO 535 for water absorption, ISO 8784-1 for microbiological load, and REACH Annex XVII; export packaging under Regulation (EC) 1935/2004 must document migration control. Production-scale flooded nip size press and film press configurations operate at 55–80°C with web dwell times of 0.2–2.0 s; post-press drying cylinder surface temperatures are held at 90–120°C. On 400 m/min fine paper lines, lower drying temperatures create size solution tracking on after-dryer cans when wet film thickness exceeds 60 g/m², a failure mode that forces line speed reduction. For recycled linerboard, rosin-alum systems at acidic pH below 4.5 can interact with PVOH and reduce surface strength; machine trials should verify removal velocity under ISO 3783 before full commercial adoption. Terminal product types include coated woodfree inkjet base stock, recycled linerboard, silicone release base paper, and folding boxboard.
In woven cotton–polyester shirting and sheeting, the warp sizing operation must transfer a uniform size film to the yarn without producing brittle fracture at low weaving room humidity. SELVOL 107 is incorporated as the fully hydrolysed PVOH component in the size mix at 7–12 wt% of total size solids, with the PVOH fraction representing 30–60% of total synthetic binder solids; a 9 wt% solids package at 85–90°C typically holds bath viscosity between 18 and 35 mPa·s at 90°C. Auxiliary compliance is evaluated against OEKO-TEX ECO PASSPORT or ZDHC MRSL for fabric auxiliaries, while yarn tensile retention after sizing is tested under ISO 2062 or ASTM D2256. The downstream slashing process uses a single-size box or tandem slasher with size box temperature 85–95°C, squeeze roller pressure 12–18 kN/m, wet pickup 200–250%, and cylinder drying at 110–130°C; size add-on on dry yarn is maintained at 8–13 wt%. If slasher speed exceeds 120 m/min with bath viscosity above 40 mPa·s, fibre ends cling to the expansion comb and shed size film onto the lease rods. At weaving room relative humidity below 30%, the fully hydrolysed film loses elongation and generates end breaks; conditioning at 65–75% RH for 8–12 h is therefore required. Desizing must be performed with hot water at 80–95°C; washing below 70°C leaves residual PVOH deposits on drying cans. Terminal product types include high-count poplin, workwear blends, uniform fabric, and hotel sheeting.
Cold-water rewettable adhesive coatings produced with SELVOL 107 rely on the 98.0–98.8 mol% hydrolysis range to limit room-temperature tack while preserving rapid rewetting after remoistening. A typical gravure-applied envelope gum formulation contains 30–45 wt% SELVOL 107 on dry solids, 15–25 wt% plasticizer such as glycerol or sorbitol, and 0.3–1.0 wt% defoamer, diluted to 22–30% solids with deionized water at 50–65°C. The coating head must maintain viscosity between 800 and 1500 mPa·s at 55°C; lower viscosity causes slinging from the engraved gravure cylinder, while higher viscosity produces wedge-shaped coverage across the web. The coating is applied by engraved gravure cylinder to 60–100 g/m² wove envelope paper at 120–180 m/min, then dried with forced air at 80–105°C to a dry coat weight of 3–8 g/m². Compliance for adhesive coatings is assessed under ASTM D4236 for chronic health labeling, EN 71-3 for heavy metal migration in paper products intended for toy-related use, and FDA 21 CFR 175.105 for indirect food-contact adhesives. At storage relative humidity above 70%, rewetted gum may block in stack; 1–2 wt% calcium carbonate reduces blocking but slows remoistening, so mail sorting houses require peel-back tests before commercial acceptance. Terminal products include self-seal envelopes, revenue stamps, paper labels, and lottery ticket void films.
Fine ceramic tape casting formulations containing SELVOL 107 operate under a strict binder removal constraint because residual carbon after burnout becomes a sintering defect in alumina, zirconia, and silicon nitride bodies. The grade is used as a temporary green-body binder at 0.5–4.0 wt% dry solids relative to ceramic powder in slip casting and 2.0–5.0 wt% in tape casting; the narrower range of 0.8–1.5 wt% is used in spray-dried press powder. Slip preparation on production-scale ball mills using 50 vol% solids, 0.3–0.8 wt% ammonium polyacrylate or polyelectrolyte dispersant, and 10–20 h milling requires delayed PVOH addition after 4 h to avoid competitive adsorption on particle surfaces. Tape casting with a doctor blade gap of 100–500 μm onto a silicone-coated carrier film at 25–40°C is followed by staged drying; green tape edge lifting from the carrier film is observed when binder dose falls below 1.5 wt%. Lamination of multiple tape layers requires warm pressure lamination at 40–70°C and 5–15 MPa to avoid delamination. Controlled burnout in oxidizing kilns uses heating rates below 0.5°C/min between 250°C and 400°C, a plateau at 400–500°C for 1–2 h, and maximum residual carbon target below 0.05 wt%; air velocity is maintained at 0.5–2.0 m/s to remove pyrolysis products. Mechanical evaluation of sintered test bars follows ASTM C1161 or ISO 14704; final electronic ceramic components must comply with RoHS Directive 2011/65/EU and REACH SVHC restrictions. Published data for the interaction between SELVOL 107 ash content and dielectric loss tangent in tape-cast formulations is limited; therefore, lot verification of ash content below 0.5 wt% is recommended for dielectric formulations used below 1 wt% binder loading. Terminal product types include alumina substrates, zirconia oxygen sensor bodies, multilayer ceramic capacitor dielectric layers, and silicon carbide kiln furniture.
Polymer modification of cementitious tile adhesive and self-levelling underlayment dry mixes with low-viscosity fully hydrolysed PVOH is constrained by the material’s high gelation tendency in alkaline media when borate salts are present; SELVOL 107 is therefore introduced as a dry blend component at 0.2–1.0 wt% of total dry mix, usually in combination with 2.5–4.0 wt% redispersible polymer powder. The PVOH fraction increases open time and water retention, evaluated under EN 12004-2 for C2TE cementitious tile adhesive testing and open time measured under EN 1346, while compressive strength is measured under EN 196-1 or ASTM C109. Pre-blending is performed in a twin-ribbon or ploughshare mixer for 10–15 min; the preferred addition sequence is sand, cement, calcium carbonate, SELVOL 107, redispersible polymer powder, then retarder. Mixing at 500–800 rpm with 23–26 wt% water for 10–15°C installation environments requires the dry blend to be homogeneous at a coefficient of variation below 5% for PVOH content across 25 kg batch lines; this is checked by near-infrared spectroscopy on automated bagging lines. Higher addition levels above 1.0 wt% can extend open time but depress early compressive strength below 0.5 MPa at 24 h, conflicting with fast-track installation schedules. Terminal product types include C2TE and C2FT polymer-modified tile adhesives, self-levelling compounds for interior concrete substrates, and repair mortars.
In spiral tube winding, the adhesive must exhibit immediate wet tack to prevent ply separation at high winding speed without relying on borax crosslinkers that can interact with SELVOL 107 and create irreversible gelation. The PVOH is prepared as a 15–20 wt% solution at 85°C and incorporated into the final adhesive at 4–8 wt% dry PVOH; clay filler is added at 20–30 wt% to control penetration, while defoamer is dosed at 0.1–0.2 wt%. The formulated adhesive is held at 35–45% solids and 60–70°C in jacketed tanks; application to paper core plies is performed by ribbed roller or disc applicator on spiral tube winders running at 20–80 m/min. Green tack measured by a probe tack method under ASTM D2979 must exceed 20 gf/cm within 10 s of application. Compliance for paper-based industrial packaging components references FDA 21 CFR 175.105 for indirect food-contact adhesives and ASTM D1876 for T-peel resistance of bonded plies where required. A production-scale failure mode is adhesive build-up on the forming mandrel when bath viscosity exceeds 1,200 mPa·s at 25°C; viscosity control by water addition and jacketed tank temperature at 60–70°C is required. The forming mandrel is maintained at 40–60°C to avoid condensation and ply slippage. Terminal product types include paper cores for stretch film, tissue converting, aluminium foil, and textile filament winding.
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Polyvinyl alcohol grade SELVOL 107 is a fully hydrolyzed poly(vinyl alcohol) resin supplied as white to off-white granules or powder. The resin is produced by controlled alcoholysis of poly(vinyl acetate); residual acetate groups remain at a level consistent with a degree of hydrolysis of 98.0–98.8 mol%. A 4 wt% aqueous solution at 20 °C exhibits a viscosity of 5.4–6.5 mPa·s when measured according to ISO 15023-2:2019. The CAS registration number is 9002-89-5. The high hydrolysis level raises the crystalline content of the dried film and reduces cold-water solubility. Complete dissolution in batch tanks requires heating to 85–95 °C under high-shear agitation; a Cowles disperser or rotor-stator mixer operating at 10–15 m/s tip speed is used on production lines to disperse the granules before the solution clears. The material is applied in aqueous adhesive, paper surface sizing, textile warp sizing, and certain film and protective colloid operations where low cold-water sensitivity and high dry-film strength are required.
Typical manufacturer technical data sheet values for SELVOL 107 are listed below. These values represent lot-release and quality-control targets rather than guaranteed specifications for every shipment. Viscosity and hydrolysis are determined on a dry basis after moisture correction because residual water affects gravimetric preparation and final solution rheology.
| Property | Method or condition | Typical value |
|---|---|---|
| Degree of hydrolysis | ISO 15023-2:2019, saponification titration | 98.0–98.8 mol% |
| Viscosity | ISO 15023-2:2019, 4 wt% aqueous solution at 20 °C | 5.4–6.5 mPa·s |
| pH | 4 wt% aqueous solution | 5.0–7.0 |
| Volatile content | Oven drying | ≤5.0 wt% |
| Ash content | As Na₂O | ≤1.2 wt% |
The residual acetate content calculated from the hydrolysis range is approximately 1.2–2.0 mol%. This low residual acetate concentration permits dense interchain hydrogen bonding after drying, which directly affects cold-water insolubility, crystallinity, and resistance to plasticization by atmospheric moisture. The ash content is primarily residual sodium acetate from the saponification step and can influence clarity in cast films if not controlled.
At hydrolysis levels above 98 mol%, the reduced acetate side groups no longer provide sufficient steric disruption to prevent crystallite formation. The hydroxyl groups align into ordered domains during drying, increasing the glass transition and reducing the rate of water penetration. Below approximately 40 °C the granules swell but do not completely dissolve; true solution formation requires heating to 85–95 °C under mechanical shear. This thermal requirement is an operational boundary in adhesive and sizing plants where cold-water make-down equipment is designed for starches or partially hydrolyzed PVOH grades.
The crystallization behavior also narrows the melt-processing window. Fully hydrolyzed PVOH begins to decompose near 200 °C, so single-screw extrusion is typically limited to barrel zone temperatures between 180 °C and 200 °C with pre-drying to below 0.5 wt% moisture. Without pre-drying at relative humidity above 60%, absorbed moisture causes screw slip, bubbles, and dimensional instability in extruded strands. Published data for this specific grade under melt extrusion is limited; general fully hydrolyzed PVOH degradation behavior is documented in polymer science literature.
Adhesive compounding with SELVOL 107 uses a make-down sequence in which the granular resin is dispersed in cold water, then heated to 90–95 °C under high-shear agitation until the solution clears. The solution is Newtonian at low solids and becomes shear-thinning at higher concentrations due to chain entanglement. In corrugated and paper-laminating adhesive systems, the grade is used at 2–5 wt% of the wet formulation to control penetration into porous substrates. Formulation viscosity is measured with a Brookfield RVT at 20 rpm and 25 °C per ASTM D1084. The resin alone does not confer water-resistant bonding; crosslinkers such as glyoxal or borate insolubilizers are normally required. Borate addition must be controlled by titration because excess borate causes irreversible gelation in the mixing vessel. Stainless-steel or glass-lined equipment is preferred to limit iron pickup at pH 5.0–7.0.
The primary change when replacing SELVOL 103 with SELVOL 107 is higher solution viscosity at equal solids. SELVOL 103 has a 4 wt% solution viscosity of 3.5–4.5 mPa·s at 20 °C; SELVOL 107 has 5.4–6.5 mPa·s. Both grades share a hydrolysis range of 98.0–98.8 mol%. A formulator moving from 103 to 107 should reduce resin solids by 0.5–1.0 wt% to maintain equivalent application viscosity, or adjust the starch-to-resin ratio in corrugated adhesives. The higher molecular weight of 107 contributes to greater film tear resistance and increased heat-seal strength in paper lamination, but published data for this specific grade under ASTM F88 seal-strength testing is limited. Processing equipment changes are minor; both grades require the same 85–95 °C dissolution temperature and high-shear make-down. The practical difference is that 107 provides more viscosity build per unit weight, which can reduce resin demand but requires higher torque in transfer pumps.
| Grade | Hydrolysis | 4 wt% solution viscosity at 20 °C | Cold-water solubility |
|---|---|---|---|
| SELVOL 107 | 98.0–98.8 mol% | 5.4–6.5 mPa·s | Insoluble; swelling only |
| SELVOL 103 | 98.0–98.8 mol% | 3.5–4.5 mPa·s | Insoluble; swelling only |
| SELVOL 205 | 87.0–89.0 mol% | 5.2–6.2 mPa·s | Partially soluble |
Paper surface sizing with fully hydrolyzed PVOH grades such as SELVOL 107 is conducted on conventional size presses at solids of 4–8 wt%. The solution is applied to the sheet at 40–60 °C to prevent viscosity increase in the pan. The high hydrolysis level yields a film that resists oil and grease penetration; oil resistance is commonly assessed by TAPPI T 559 kit testing. Textile warp sizing uses 6–10 wt% solids with plasticizers such as glycerol or polyglycols to reduce brittleness. Emulsion polymerization uses fully hydrolyzed PVOH as a protective colloid only when the polymerization temperature is maintained above 80 °C because the resin must remain in true solution; below that temperature, phase separation can occur. Water-soluble film casting from SELVOL 107 requires slot-die or roller casting at 60–80 °C with controlled drying to minimize crystallinity-induced haze.
Partially hydrolyzed SELVOL 205 is characterized by 87.0–89.0 mol% hydrolysis and a comparable 4 wt% solution viscosity of 5.2–6.2 mPa·s at 20 °C. Its residual acetate content of roughly 11–13 mol% lowers crystallinity and permits dissolution in cold water. In emulsion polymerization protective-colloid service, SELVOL 205 is generally preferred because cold-water solubility and lower gel temperature aid reactor charging and particle nucleation. SELVOL 107, by contrast, is selected when the finished polymer requires lower cold-water sensitivity, higher tensile strength, or better organic solvent resistance. Films from 107 resist re-dissolution below 40 °C, while films from 205 may re-wet and disperse more readily. The viscosity curves are similar, so switching between these grades does not require major pump or mixer changes. However, SELVOL 107 demands heating to 85–95 °C; SELVOL 205 can be dissolved at 70–80 °C. The selection criterion is therefore the required balance between hot-water solubility and dry-film resistance.
Operational boundaries for SELVOL 107 include moisture uptake, thermal degradation, and incompatibility with certain ionic species. At relative humidity above 60%, the granules absorb atmospheric moisture, which affects gravimetric feeders and can cause arching in silos. Drying is recommended before melt processing to below 0.5 wt% moisture. Aqueous solutions should not be held at 90 °C for extended periods; viscosity drift may occur. Phenolic, aldehyde, or glyoxal-based crosslinkers can react with hydroxyl groups; compatibility should be verified in jar tests under production pH. Borates, cupric ions, and certain titanium salts can gel or precipitate the polymer. Compliance under 21 CFR 175.105, 21 CFR 176.170, and 21 CFR 176.180 may be applicable for food-contact adhesives and paper, but end-use migration testing remains the responsibility of the converter. No SVHC listing under REACH Annex XIV is currently applicable. The manufacturer’s current safety data sheet and technical data sheet should be consulted for lot-specific batch data.
