Hydrophilic coating (developed product)
What is Hydrophilic Coating?
Hydrophilicity is a property that causes water on a surface to spread out into a thin film rather than
forming droplets.
Benefits: Ensures a clear field of vision and prevents dirt from sticking to the surface
Product features
The existing PHILICFINE HP series has been revamped. The updated product not only boasts tremendously improved performance, but also forms coatings that are both photocatalytic hydrophilic and anti-reflective.
| Photocatalytic self-cleaning |
| Maintains hydrophilicity in dark places |
| Excellent weather resistance |
| Can be formed by vacuum deposition in a manner consistent with AR coatings |
Uncoated
Coated*
*After 24 hours of UV-A (1.5mW/cm2) irradiation
Product Lineup
| HP-1 | HP-2 | HP-3 | Developed product（PL-001） | |
|---|---|---|---|---|
| Hydrophilicity (Initial contact angle) |
4.4° |
6.5° |
12.2° |
4.7° |
| Weatherability*1 | × 30°＜ |
〇 30°＞ |
◎ 10°＞ |
◎ 10°＞ |
| Abrasion Resistance*2 | ◎ 10°＞ |
〇 30°＞ |
× 30°＜ |
〇 30°＞ |
| Water marking | Yes | Yes | Yes (Minimal) | No |
| Refractive Index (Film Thickness)*3 | approx. 1.55(83nm) | approx. 1.65(94nm) | approx. 1.81(81nm) | Outermost layer: approx. 1.48(88nm) |
- *1: Contact angle after Xenon Weather Meter Test
- *2: Contact angle after cotton with a load of 1kg was moved back and forth 500 times.
- *3: Wavelength: 550nm
The above comparison table shows the results of inhouse evaluations. Results may differ depending on the coating method.
Hydrophilicity maintenance under UV-A irradiation
| Test conditions | |
|---|---|
| Light source | Blacklight Blue lamp |
| UV strength | 1.5mW/cm2 |
| Measuring equipment | Contact angle meter |
| Measuring method | Θ/2 method |
| Droplet used | Pure water |
Hydrophilicity maintenance in low light
| Test conditions | |
|---|---|
| Measuring equipment | Contact angle meter |
| Measuring method | Ellipse fitting |
| Droplet used | Pure water |
Self-cleaning function
| Self-cleaning test conditions | |
|---|---|
| Coating material | Stearic acid |
| Light source | Blacklight Blue lamp |
| UV strength | 1.5mW/cm2 |
| Measuring equipment | Contact angle meter |
| Measuring method | Θ/2 method |
| Droplet used | Pure water |
Accelerated weathering test
Water contact angle before and after weathering test
| Accelerated weathering test conditions | |
|---|---|
| Test device | Xenon Weather Meter |
| Relative humidity | 63±3[℃]、50±5【%Rh】 |
| Testing time | 920 [h] |
| Light source | Xenon arc lamp |
| Filter | Quartz／#275 |
| Irradiance | 180 [W/m2] |
| Water spray cycle | Sprayed for an 18-minute period for each 120-minute period of exposure |
Transmittance before and after weathering test
| Changes in appearance before and after weather resistance testing | ||
|---|---|---|
| 240[h] | 460[h] | 920[h] |
| No change | No change | No change |
Please feel free to contact us through the inquiry form if you have any questions or requests regarding our products.