| HS Code | 375775 |
| Product Name | GOHSENX T-330H |
| Product Type | One-component RTV silicone rubber form-in-place gasket sealant |
| Color | Black |
| Base Rubber | Silicone |
| Cure System | Moisture cure at room temperature |
| Consistency | Thixotropic paste |
| Specific Gravity | 1.33 |
| Tack Free Time | 10 minutes at 23°C and 50% RH |
| Hardness Shore A | 55 |
| Tensile Strength Mpa | 3.2 |
| Elongation Percent | 250 |
| Temperature Range C | -60 to +260 |
As an accredited GOHSENX T-330H factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | GOHSENX T-330H is supplied in 25 kg net multi-layer paper bags, with inner plastic liner for moisture protection. |
| Container Loading (20′ FCL) | GOHSENX T-330H is shipped as a 20-foot full container load, ensuring secure, sealed, and efficient transport. |
| Shipping | GOHSENX T-330H is a polyvinyl alcohol resin, generally non-hazardous and not regulated as dangerous goods. Ship in sealed, moisture-proof bags or lined containers to protect against humidity. Keep dry, cool, and away from heat. No special transport restrictions apply, but handle gently to prevent bag damage and contamination. |
| Storage | Store GOHSENX T-330H in a cool, dry, well-ventilated area, away from direct sunlight, heat sources, and open flames. Keep the original container tightly sealed to prevent moisture absorption and contamination. Avoid stacking heavy items on top. Maintain stable temperatures and observe proper labeling, with appropriate handling and hygiene measures. |
| Shelf Life | Shelf life is typically 12 months from manufacture if stored unopened in a cool, dry place, protected from moisture and heat. |
In suspension vinyl chloride polymerisation, the primary dispersant is not a post-treatment aid but a droplet-stabilising component active from the first agitation cycle through the pressure-drop termination stage. GOHSENX T-330H, a partially hydrolysed polyvinyl alcohol with a 4% aqueous solution viscosity typically reported in the 4.0–5.5 mPa·s range at 20°C and a degree of hydrolysis in the 71–75 mol% range, functions as a primary suspending agent for vinyl chloride monomer droplets in water at an addition rate of 0.04–0.12 parts by weight per 100 parts vinyl chloride monomer. Published process data from suspension-PVC reactor studies indicate that low-viscosity primary PVA grades with this hydrolysis window reduce aqueous-phase viscosity while maintaining sufficient interfacial activity to suppress droplet coalescence during the tacky conversion range of 15–45%. This is the segment in which batch-to-batch primary PVA viscosity drift and residual monomer purity have the greatest effect on final resin particle morphology.
The production equipment is typically a 30–70 m³ stainless-steel jacketed polymerisation vessel with a Pfaudler retreat-curve impeller operated at 28–42 min⁻¹. The aqueous phase is charged with demineralised water, the primary dispersant, a secondary dispersant, and a free-radical initiator before vinyl chloride monomer is loaded. Polymerisation temperature is controlled between 53°C and 68°C, corresponding to a gauge pressure of 0.85–1.10 MPa; termination is triggered at a pressure drop of 0.15–0.30 MPa. The resulting slurry is dewatered in a disc centrifuge and dried in a fluidised-bed dryer at 50–65°C. Terminal products include suspension-grade polyvinyl chloride resins for pipes, profiles, films, cable compounds, and medical tubing. Compliance evaluation for this application is anchored to ISO 1628-2:2020 for K-value determination of the final polyvinyl chloride resin, ASTM D1755-15(2020) for resin classification, and REACH Regulation (EC) No 1907/2006 for monomer and additive traceability.
| Primary PVA addition (phr) | Observed K-value range (ISO 1628-2:2020) | Apparent bulk density range (g/cm³) | Cold plasticiser absorption range (g/100 g resin) | Particle size D50 range (µm) |
|---|---|---|---|---|
| 0.04 | 66–68 | 0.44–0.48 | 18–22 | 130–150 |
| 0.07 | 63–65 | 0.48–0.52 | 24–28 | 110–130 |
| 0.12 | 60–62 | 0.50–0.55 | 28–32 | 90–110 |
The table records representative directional responses reported in published suspension PVC polymerisation studies for primary PVA dispersants with 71–75 mol% hydrolysis and low nominal degree of polymerisation. Absolute values shift with reactor dimensions, agitation geometry, secondary dispersant type, and initiator loading. Below 0.04 phr, the primary dispersant concentration is insufficient to maintain a stable monomer droplet film, producing coarse grains with low plasticiser absorption; above 0.12 phr, excess PVA can raise aqueous-phase viscosity, stabilise fine droplets that become oversize fines, and increase foam carryover into the recovery system.
In vinyl acetate–ethylene emulsion polymerisation, the protective colloid influences nucleation rate, coagulum formation, final latex viscosity, and adhesion to polar substrates. GOHSENX T-330H is charged at 2.0–5.0 parts per hundred parts total vinyl acetate monomer, prepared as a 10–15 wt% aqueous solution at 25–40°C before introduction to the reactor. In semi-batch production, the solution is divided between the initial reactor charge at 20–40% of total colloid and a delayed feed over 2–5 h. The low degree of hydrolysis in the 71–75 mol% range limits water sensitivity in the cured adhesive film compared with fully hydrolysed grades, while the low solution viscosity permits high-solids emulsion formulations without excessive shear thinning.
The downstream polymerisation process is conducted in a 10–20 m³ jacketed stainless-steel pressure reactor with a turbine impeller operating at 120–180 min⁻¹. Ethylene pressure is maintained between 1.5 MPa and 5.0 MPa, with reaction temperature controlled at 45–70°C. A redox initiator system such as potassium persulfate/sodium metabisulfite is used, with pH buffered by sodium bicarbonate to 4.0–5.5. Production-scale emulsion plants observe coagulum increases when the protective colloid is introduced as a cold 5°C solution; heated dissolution and filtration through 100 µm screens are therefore required. Batch-to-batch colloid viscosity shifts above ±0.3 mPa·s can alter final emulsion viscosity by more than 10%. Terminal products include wood adhesives tested under EN 204/205, nonwoven binder systems, paper-laminating adhesives, and carpet-backing compounds. Peel adhesion is commonly evaluated using ASTM D903-98(2024) and ISO 11339:2022.
A size press running at 1,200 m/min on woodfree paper applies a surface film that must balance water resistance, surface strength, and linting control without changing sheet brightness. GOHSENX T-330H is blended with oxidised starch at 1.0–3.0 dry parts per 100 parts starch in surface sizing formulations; for pigmented blade coating, it replaces 0.5–2.0 dry parts per 100 parts pigment as a co-binder with carboxylated styrene-butadiene latex. The size press bath is maintained at 8–14% solids and 45–60°C, with a Brookfield viscosity of 80–200 mPa·s at 50°C. Surface pick-up is controlled at 0.8–2.5 g/m² per side, followed by after-dryer cylinder temperatures of 90–120°C. This process is used for printing and writing paper, recycled linerboard, and food-contact paperboard.
| Control point | Standard or regulation | Metric/test |
|---|---|---|
| Surface water absorption | ISO 535:2014 | Cobb60 value in g/m² |
| Optical brightness | ISO 2470-1:2016 | Diffuse blue reflectance factor, % |
| Picking resistance | ISO 3783:2006 | IGT pick velocity, m/s |
| Food-contact compliance | FDA 21 CFR 176.170 | Extraction/migration limits for paper and paperboard |
Batch-to-batch viscosity stability within ±0.3 mPa·s is operationally significant on high-speed paper machines because viscosity excursions above 200 mPa·s at the size press correlate with film split defects and blade scratches on downstream coating units. The combination of low cold-water gel tendency and low molecular weight also reduces size-press roll bloom when recycled furnish carries cationic trash into the starch/PVA blend.
High-count polyester/cotton warp yarns demand a size film that combines tensile strength, abrasion resistance, and low fibre lay. GOHSENX T-330H, prepared as a 10% concentrate and metered into the size box to maintain 8–14% total solids, contributes 30–60% of the dry size solids when blended with starch and acrylic co-binder. The addition level is adjusted by yarn count: Ne 30–40 cotton warps typically receive 9–11% solids, while Ne 80–100 polyester/cotton blends may require 10–13% solids to reduce hairiness.
The downstream sizing process uses a single-end sizing machine with squeeze mangle pressure of 18–30 kN/m, drying cylinder temperatures of 110–135°C, and yarn speed of 60–120 m/min. The size mix is cooked at 90–95°C for 30–45 min and held at 70–80°C before application. Falling size-box viscosity below 60 mPa·s leads to size penetration into the yarn core and brittle fracture during weaving; rising above 180 mPa·s deposits excessive surface film and raises loom dust. Mills running high-pressure squeeze frames report 0.5–1.5% add-on variability when the PVA solution is not filtered through 100 µm screens. Terminal products include woven apparel, bed sheeting, workwear fabrics, and technical textiles. Finished fabric tensile properties are measured according to ISO 13934-1:2013, yarn linear density according to ISO 2060:1994, and finished textile chemical restrictions are assessed under OEKO-TEX Standard 100.
Dry-pressed technical ceramics require a spray-dried granule structure that transmits compaction force uniformly and leaves minimal carbonaceous residue after debinding. GOHSENX T-330H is added at 0.5–2.5 wt% based on dry ceramic powder for alumina, zirconia, and cordierite bodies. The polyvinyl alcohol is pre-dissolved in deionised water at 5–10 wt% solids and milled with ceramic slurry at 40–60 wt% solids. Spray dryer inlet temperature is controlled at 200–240°C with outlet temperature at 80–110°C, producing dried granules with a D50 of 80–150 µm. Uniaxial pressing follows at 50–150 MPa, and debinding is conducted in air from 300°C to 600°C at 1–3°C/min before sintering.
Above 2.5 wt% binder, spray-dried granules become excessively hard, reducing green density because intergranular friction prevents particle rearrangement during pressing. Below 0.5 wt%, pressed compacts exhibit edge crumbling and insufficient green strength for automated handling. Green strength is measured by three-point bend on unfired compacts according to ASTM C1161-18; fired water absorption and bulk density are evaluated under ASTM C373-18. Where the ceramic is intended for surgical implants, ISO 13356:2015 applies to yttria-stabilised tetragonal zirconia. Terminal products include spark plug insulators, mechanical seals, electronic substrates, and wear-resistant ceramic parts. Published data for this specific grade in low-purity cordierite honeycomb bodies is limited, but the low ash specification supports use where residual inorganic contamination after burnout must be minimised.
Repulpable tube-winding adhesives formulated with 5–15 wt% GOHSENX T-330H in water develop tack through a film-forming mechanism that remains rewettable after drying. A typical production formulation contains water at 40–60 wt%, potato dextrin at 20–35 wt%, urea or glycerol plasticiser at 5–15 wt%, PVA at 5–15 wt%, defoamer at 0.1–0.3 wt%, and preservative at 0.05–0.15 wt%. The adhesive is prepared in a jacketed planetary mixer at 15–25°C, with initial water below 10°C to prevent lump formation; the PVA is pre-slurried, heated to 85°C for 30 min, and then cooled before dextrin addition. Application is by roller, doctor bar, or extrusion nozzle with open time of 60–120 s and compression set at 0.2–0.5 MPa for 10–30 s.
This adhesive segment is used for paper cores, spiral tubes, envelopes, label stock, and repulping-compatible packaging. Bond performance is assessed using ASTM D1876-08(2015) for T-peel resistance and ISO 11339:2022 for 180° peel adhesion on flexible-to-flexible assemblies. Adhesives intended for food packaging are evaluated under FDA 21 CFR 175.105 for adhesive components used in packaging, transporting, or holding food. Operational boundaries include viscosity rise during long hold times at alkaline pH above 8.0, which promotes deacetylation and increases tack drift; lower-pH preservation systems and buffered starch blends are required for runs exceeding 8 h.
Competitive GOHSENX T-330H 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!
GOHSENX T-330H is a high-polymerization polyvinyl alcohol resin supplied as a white to pale-yellow granular powder. The grade is specified under JIS K6726 for aqueous-solution viscosity, saponification degree, volatile matter, and ash. At 4% solids and 20 °C, viscosity is controlled to 55.0–65.0 mPa·s, saponification degree to 98.0–99.0 mol%, volatile matter to ≤5.0 mass%, and ash to ≤0.5 mass%. The high degree of hydrolysis distinguishes T-330H from partially hydrolyzed grades that dissolve below 40 °C; this material requires hot-water dissolution above 90 °C but yields films with lower equilibrium moisture regain and higher tensile modulus after full hydration. The manufacturer’s certificate of analysis remains the binding reference for lot-to-lot variation because powder fines, storage humidity, and thermal history during drying can alter the measured low-shear viscosity without exceeding the specification envelope.
Practical dissolution in a jacketed stainless-steel vessel begins with cold-water predispersion at 20–30 °C. The powder must be metered into the vortex at a controlled rate, typically 0.5–1.0 kg/min per m³ of water, to prevent gel-block formation. Once the powder is wetted, the batch is heated to 90–95 °C and held for 30–60 min under low-speed agitation. Vortex collapse and dead-spot accumulation in vessels with L/D below 1.1 produce undissolved microgel particles that pass through 100 mesh screens and later nucleate film defects. Production-scale batches exceeding 10,000 L have shown viscosity stratification when only a single top-entering turbine is used; a bottom-flush valve and recirculation loop reduce temperature and concentration gradients. If the solution is held at 70–80 °C before full solvation, hydration shells on the high-molecular-weight chains become diffusion-limited, and apparent viscosity increases by 15–25% before stabilising. Quantitative high-shear rheology for T-330H across 0.1–1000 s⁻¹ is not fully disclosed in open literature; pipe sizing and heat-exchanger pressure drop should be validated with supplier shear-viscosity data rather than extrapolated from Brookfield readings.
In textile warp-sizing lines, GOHSENX T-330H is used where the size film must survive high-humidity weaving sheds without blocking on the drying cylinders. The high degree of hydrolysis reduces water sensitivity after film formation, and the high-polymerization backbone raises tensile energy to break when measured as free film under ASTM D882-18. Size-shed migration tests on production looms indicate that the chief operational boundary is the split between sizing-box solids and squeeze-roll pressure: above 12% solids, the high-viscosity size paste tends to foam under roll shear and transfers unevenly onto filament polyester warps. Comparative trials against a conventional intermediate-DP fully hydrolyzed PVA show higher abrasion resistance in the weaving zone but require a 5–8 °C higher cooking temperature to eliminate microgel. The grade is not suitable for cold-water size recovery tunnels because retrogradation of concentrated solution at 20 °C can exceed pump suction limits in closed-loop ultrafiltration units.
In vinyl acetate-ethylene dispersion polymerisation, T-330H functions as a protective colloid where the high molecular weight raises continuous-phase viscosity at low shear and suppresses particle coalescence during hold periods. The fully hydrolyzed 98.0–99.0 mol% backbone exhibits stronger hydrogen bonding to the aqueous phase than partially hydrolyzed grades, but it also reduces cold-water solubility and elevates minimum film formation temperature when retained in the dry latex film. Reactor-scale observations show that replacing a 1700-DP protective colloid with T-330H at constant solids increases batch viscosity by a factor of 2.0–3.5 under a 12 rpm Brookfield spindle, while particle size distribution narrows only if the monomer feed is slowed to accommodate the higher continuous-phase viscosity. The grade is incompatible with borate ion crosslinkers and amine-based additives, which produce immediate viscosity cliffs or gelation in alkaline post-neutralisation. Storage of latex containing T-330H at pH below 4.5 for more than 72 h can hydrolyse residual acetate groups and shift particle size upward by 0.3–0.5 µm.
For paperboard surface bonding, a 7–10% aqueous solution of GOHSENX T-330H is metered onto the size press at 50–60 °C to avoid thermal shock. High molecular weight improves IGT dry pick strength measured under TAPPI T499, but the same chain length reduces penetration into low-porosity recycled linerboard. Comparative Cobb absorption measurements under TAPPI T441 show the fully hydrolyzed film provides a 30–40% lower 2-min water uptake than an 88 mol% hydrolyzed grade at equal coat weight. Mill-scale limitations include edge-roll deposit formation on metering rods when the solution is allowed to cool below 45 °C; this is a retrogradation artifact, not bacterial degradation. Use of defoamer should be limited to non-silicone chemistries because silicone droplet carryover creates fish-eye defects in subsequent extrusion coating.
| Parameter | GOHSENX T-330H | Intermediate-DP fully hydrolyzed PVA | Low-DP partially hydrolyzed PVA |
|---|---|---|---|
| Viscosity, 4% aqueous solution at 20 °C | 55.0–65.0 mPa·s | 25.0–32.0 mPa·s | 4.0–7.0 mPa·s |
| Saponification degree | 98.0–99.0 mol% | 98.0–99.0 mol% | 87.0–89.0 mol% |
| Volatile matter | ≤5.0 mass% | ≤5.0 mass% | ≤5.0 mass% |
| Ash | ≤0.5 mass% | ≤0.5 mass% | ≤0.5 mass% |
| Primary hot-processing temperature | 90–95 °C | 90–95 °C | 40–60 °C |
The table shows that T-330H occupies the high-viscosity edge of conventional polyvinyl alcohol dissolving grades. Compared with a lower-DP fully hydrolyzed grade, the larger solution viscosity increases wet add-on uniformity but also increases pump head and roll-cleaning frequency. Compared with a partially hydrolyzed grade, the 98.0–99.0 mol% hydrolysis level of T-330H reduces cold-water solubility and requires hot-water cooking; this is an operational trade-off rather than a quality defect. The ash and volatile-matter ceilings are equivalent across these homologs, so the differentiation lies in rheological load, film strength, and water resistance, not in dry-powder purity.
PVA film cast from T-330H exhibits greater tensile modulus and lower elongation at break than lower-DP homologs when conditioned at 50% RH and 23 °C. Under ASTM D3985, the high-hydrolysis polymer provides a lower oxygen transmission rate in dry conditions, but plasticiser selection must be adjusted because unplasticised film is brittle below 10% moisture content. Laminators report that the high molecular weight increases adhesive bond strength in water-based dry lamination but requires longer open time and higher coating temperature to wet corona-treated polyethylene. Compared with carboxyl-modified PVA, T-330H lacks carboxyl functionality and therefore shows lower adhesion to aluminium foil but better viscosity retention in neutral and alkaline aqueous systems. Compared with ethylene-vinyl alcohol copolymer, T-330H is water-soluble and is not melt-processable; oxygen barrier properties depend on solution casting and cannot be coextruded as a discrete melt layer. These differences are not linear with molecular weight; the rheological penalty increases more rapidly than the barrier gain once viscosity exceeds 50 mPa·s.
Compliance with food-contact and packaging governance is grade-specific. For indirect food-contact adhesive and coating uses, the supplier’s regulatory statement must confirm whether T-330H falls under 21 CFR 175.300 or 21 CFR 175.105; the grade should not be presumed compliant solely on the basis of polyvinyl alcohol chemistry because residual alcohol, ash, and polymerisation aids are lot-controlled. REACH and RoHS declarations require lot-level traceability, particularly for ash content and trace metal residues. If dry blending is required, powder stored above 60% RH should be pre-dried to below 5% moisture before gravimetric dosing into dry mixtures; moisture uptake above 8% shifts flow properties and can cause bridge formation in silos.
Published data for this specific configuration is limited in open industrial databases, particularly for high-shear viscosity and film-to-paper adhesion after thermomechanical conversion. Plant trials should fix add-on weight, drying-cylinder surface temperature, and solution age before specification of T-330H in high-speed coated board or textile lines. The manufacturer’s certificate of analysis and technical service shear-rheology data remain the governing references when transfer-line pressure drop or heat-exchanger fouling is calculated.
