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Optimized Processability
At the same high loading concentration, DW-1070 causes a significantly smaller reduction in the resin's melt flow index compared to conventional titanium dioxide. It shortens compounding time and lowers viscosity under high shear rates, improving processing efficiency and finished-product uniformity.
Product Performance Brief · Part 2
DW-1070 Performance Properties
Beyond optical quality, DW-1070 delivers the processing and durability characteristics required for demanding plastics applications. This brief covers three core performance areas: hiding power (opacity), processing stability (TGA), and outdoor weather resistance.
Super-dispersed TiO2 Masterbatch
PVC / PE / PP Compatible
Benchmarked vs TiO2(616S)
ISO 4892-3 weathering
01
Opacity Strength
Hiding power · Transmittance and opacity comparison
Opacity is calculated as 100 × (1 − transmittance). Under identical loading, DW-1070 matches the reference rutile TiO2(616S) at 6.0% transmittance and 94% opacity — confirming that the super-dispersed masterbatch delivers equivalent hiding power while providing the dispersion and processing benefits described in later sections.
TiO2(616S) — Reference
DW-1070
· Test panel: 2 g pigment / 66 g PVC, 1 mm thickness
Key Finding
DW-1070 achieves the same opacity (94%) and transmittance (6.0%) as the rutile reference — full hiding power with no compromise.
| Product | Transm. | Opacity |
|---|---|---|
| TiO2(616S) Ref | 6.0% | 94% |
| DW-1070 Ours | 6.0% | 94% |
Equivalent Hiding Power
Matches premium rutile TiO2 opacity at the same loading — no need to increase pigment dosage when switching to DW-1070.
Consistent Across Substrates
Validated in both PP and PVC sheets at 1 mm thickness, demonstrating broad processing compatibility.
Cost-in-Use Advantage
Because dispersion is built into the masterbatch, formulators retain full opacity without the dispersion losses common to powder pigments.
02
Thermogravimetric Analysis (TGA)
Volatility profile · Weight retention vs temperature
Low volatile content is critical for high-temperature plastics processing — excess moisture or volatiles cause bubbles, silver streaks and surface defects. DW-1070 retains 99.5% of its initial mass even at 150 °C, confirming an ultra-low volatile content suitable for demanding extrusion and injection-molding conditions.
DW-1070 (PE masterbatch)
· Heating from 50 °C to 150 °C
Key Finding
Less than 0.5% mass loss across the full 50–150 °C processing window — avoiding bubbles and silver streaks during extrusion and molding.
| Temp (°C) | Weight (g) | Loss |
|---|---|---|
| 50 | 100.0 | 0.0% |
| 70 | 100.0 | 0.0% |
| 90 | 99.9 | 0.1% |
| 110 | 99.8 | 0.2% |
| 130 | 99.7 | 0.3% |
| 150 | 99.5 | 0.5% |
Defect-Free Processing
Ultra-low volatiles prevent bubble and silver-streak formation that commonly plague pigments with residual moisture.
Wide Process Window
Stable from 50 °C through 150 °C, covering standard PE, PP, and PVC processing temperatures.
Predictable Material Balance
Sub-0.5% mass loss means accurate gravimetric dosing — formulations stay on-spec without compensation factors.
03
Weather Resistance
Accelerated UV aging · ΔE color shift over time (ISO 4892-3)
Accelerated weathering simulates outdoor UV exposure for PVC window and door profiles. Three PVC specimens were tested in parallel under ISO 4892-3 — (1) unfilled PVC with no TiO2 addition as the negative control, (2) PVC with 3% reference rutile TiO2(616S), and (3) PVC with 3% DW-1070. Without any pigment, PVC undergoes rapid photodegradation: dehydrochlorination produces conjugated polyenes that drive ΔE up to ~25.6 at 168 hr — visibly yellow and surface-damaged. Both TiO2-stabilized samples stay below ΔE 1.3 over the same window, with DW-1070 tracking at or slightly below the reference (final ΔE 1.18 vs 1.22).
DW-1070 (3% in PVC)
TiO2(616S) (3% in PVC)
None addition (PVC only — control)
· Lower ΔE = better color retention
Key Finding
At 168 hr: DW-1070 ΔE 1.18 vs reference 1.22 — a ~22× improvement over unfilled PVC (ΔE 25.6). Both pigmented samples deliver outdoor-grade color stability; DW-1070 slightly outperforms the rutile reference.
| Hours | None addition | Ref (616S) | DW-1070 |
|---|---|---|---|
| 24 | 3.20 | 0.15 | 0.14 |
| 48 | 6.50 | 0.42 | 0.42 |
| 72 | 10.40 | 0.62 | 0.60 |
| 96 | 14.80 | 0.96 | 0.94 |
| 168 | 25.60 | 1.22 | 1.18 |
~22× UV Protection
At 168 hr exposure, DW-1070 PVC sits at ΔE 1.18 vs ΔE 25.6 for unfilled PVC — converting visible yellowing and surface damage into virtually unchanged white.
On-Par with Premium Reference
Color shift tracks the rutile TiO2(616S) reference across the full 168 hr window, ending slightly below it (1.18 vs 1.22) under ISO 4892-3.
Long-Term Color Stability
Final ΔE ≈ 1.2 keeps finished parts visually consistent over their service life — critical for warranty-backed window and door systems.
04
Melt Rheology
Viscosity vs shear rate · 70% TiO2 in 12 MFI LDPE at 190 °C
Melt viscosity directly controls how a TiO2-loaded compound behaves during extrusion, coating, and film-blowing. Two samples were tested at identical loading — 30% LDPE (12 MFI) as the carrier resin plus 70% of either (1) DW-1070, Super-dispersed TiO2 Masterbatch or (2) reference rutile titanium dioxide, TiO2(616S). At 190 °C, DW-1070 shows a much flatter viscosity profile than the reference — starting at ~6575 Pa·s vs ~20800 Pa·s at low shear, and converging at high shear. This makes DW-1070 especially suited to high-temperature extrusion coating and lamination (e.g., flexible packaging) where high speeds and high temperatures otherwise risk pinholes, cracks, and surface defects in the finished film.
DW-1070 (Super-dispersed TiO2 Masterbatch) · 6575 Pa·s @ 1 s⁻¹
TiO2(616S) — Rutile reference · 20800 Pa·s @ 1 s⁻¹
· 30% LDPE (12 MFI) + 70% pigment · 190 °C
Key Finding
At 1 s⁻¹, DW-1070 viscosity is ~68% lower than the reference (6575 vs 20800 Pa·s). The flatter shear-thinning profile means less viscosity swing across the processing window — fewer pinholes and cracks in extrusion-coated and laminated films.
| Shear (s⁻¹) | Ref (616S) | DW-1070 |
|---|---|---|
| 1 | 20800 | 6575 |
| 10 | 4243 | 2182 |
| 100 | 871 | 723 |
| 1000 | 178 | 243 |
Easier High-Speed Processing
Lower low-shear viscosity reduces motor load and pressure spikes during extrusion coating and film blowing — protecting line throughput at high TiO2 loadings.
Fewer Film Defects
A flatter viscosity curve means less abrupt shear-thinning, which translates into fewer pinholes, cracks, and surface imperfections in laminated and coated films used for packaging.
Higher Loading Without Penalty
Even at 70% TiO2, DW-1070 stays processable on standard LDPE lines at 190 °C — enabling concentrated masterbatches that reduce dosing volume downstream.
05
Internal Mixer Power Curve
Power vs time · DW-1070 (pre-dispersed) vs TiO2(616S) raw powder
Internal mixer power consumption is a direct measure of how much energy is needed to incorporate and disperse a pigment into the resin. Two samples were compared in an internal mixer (Banbury / BR) — 30% LDPE (12 MFI) carrier resin plus 70% of either (1) DW-1070, Super-dispersed TiO2 Masterbatch or (2) reference rutile titanium dioxide, TiO2(616S). The reference powder needs full wetting and dispersive mixing — peak power climbs to ~27 kW with fusion at ~41 s. DW-1070, already pre-dispersed in carrier resin, only requires distributive blending — peak power stays around ~13 kW with fusion at ~10 s, then settles to a low, steady ~8 kW.
DW-1070 (Super-dispersed TiO2 Masterbatch)
TiO2(616S) — Rutile reference
· 30% LDPE (12 MFI) + 70% pigment
Key Finding
DW-1070 reaches fusion in ~10 s vs ~41 s for the reference, and peak motor power drops from ~27 kW to ~13 kW — ~52% lower peak energy and ~4× faster cycle time. This translates directly into higher throughput and lower electricity cost per kilogram of compound.
| Metric | Ref (616S) | DW-1070 |
|---|---|---|
| Peak power | 27 kW | 13 kW |
| Time to peak | 22 s | 6 s |
| Fusion time | 41 s | 10 s |
| Steady-state power | 12 kW | 8 kW |
~52% Lower Peak Power
Pre-dispersed pigment means no need for high-energy dispersive mixing — peak motor load drops dramatically, protecting motor and gearbox from overload trips.
~4× Faster Fusion
Fusion in ~10 s instead of ~41 s shortens cycle time, multiplies batch throughput on the same equipment, and reduces residence time at high temperature.
Lower Energy & Cost per kg
Lower peak + shorter cycle = significantly less kWh per kilogram of compound, with the bonus of less wear on rotors and chamber walls.