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 completely free of fluorine components (obviously PFAS free / non PFAS grades). By taking advantage of these features, Neopulim™ can be used for displays and various other optical applications.

Photo: Neoplim, Transparent polyimide varnish

Neopulim™

Advantages

  • High Heat-Resistance
  • High Transparency
  • Low Temperature Dry
  • Completely free of fluorine components
  • 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 65 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 66 57 TMA
Tensile modulus GPa 2.4 2.4 JIS K 7127
Tensile strength MPa 101 102 JIS K 7127
Elongation % 150 7  JIS K 7127
Dielectric constant
（1MHz）		 － 3.72 3.44 Electrostatic capacitance
Dissipation factor
（1MHz）		 － 0.019 0.014 Electrostatic capacitance
Refractive index（594nm） － 1.61 1.59

Transmittance

Graph: About transmittance curve
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