Neopulim™ (Transparent polyimide varnish)
Neopulim™ is a solvent-soluble transparent polyimide varnish.
Because imidization is already completed, only solvent volatilization is required.
S100 and S200 are our standard grade featuring excellent transparency, high heat-resistance and PFAS free (non PFAS grades). By taking advantage of these features, Neopulim™ can be used for displays and various other optical applications.
Neopulim™
Advantages
- High Heat-Resistance
- High Transparency
- Low Temperature Dry
- PFAS free (non PFAS grades)
Applications
- For display materials
- For optical materials
- For insulating materials
- For protecting materials in manufacturing process（as film） etc.
Properties
<Varnish Properties>
| Item | unit | S100 | S200 | Measurement method |
|---|---|---|---|---|
| Viscosity | Pa・s | 35 | 55 | 25℃ |
| Non volatile content | wt% | 20.0 | 20.5 | Weight loss on heating at 320℃ |
| Solvent | － | DMAc/GBL | GBL | － |
<Film Properties>
| Item | unit | S100 | S200 | Measurement method |
|---|---|---|---|---|
| Thickness | μm | 50 | 50 | |
| Total light transmittance | % | 89.9 | 90.4 | JIS K 7136 |
| YI | － | 1.5 | 1.3 | JIS K 7136 |
| L | － | 95.1 | 95.2 | JIS K 7136 |
| a* / b* | － | 0.0 / 1.1 | 0.0 / 0.5 | JIS K 7136 |
| HAZE | － | 0.1 | 0.1 | JIS K 7136 |
| Glass-transition temp. （Tg） |
℃ | 308 | 327 | TMA |
| 1% weight reduction temp. （Td 1%） |
℃ | 473 | 483 | TGA |
| Thermal linear expansion coefficient （100-200℃） |
ppm/K | 58 | 59 | TMA |
| Tensile modulus | GPa | 2.3 ± 0.0 | 2.4 ± 0.1 | JIS K 7127 |
| Tensile strength | MPa | 96 ± 2 | 99 ± 1 | JIS K 7127 |
| Elongation | % | 8 ± 1 | 7 ± 1 | JIS K 7127 |
| Dielectric constant （1MHz） |
－ | 3.72 | 3.44 | Electrostatic capacitance |
| Dissipation factor （1MHz） |
－ | 0.019 | 0.014 | Electrostatic capacitance |
Transmittance
Inquiries Concerning Products
Green Energy & Chemicals Business Sector
High-performance Products Division
HP Material Department
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