2026/2/20
EventFilmVarnishPowder
UBE’s Polyimide at JEC World 2026 (Paris, France - March 10-12, 2026)
UPIA®
Overview
Polyimide varnish "UPIA®" is a polyamic acid precursor solution of polyimide (High-performance engineering plastics). It is the base for polyimide coated films which feature non-soluble and non-melting properties, high heat, chemical resistance, and electric insulation properties achieved through high temperature curing and imidization.
NEWS
Features
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1.High heat resistance
Polyimide film obtained from "UPIA®" exhibits a high thermal decomposition temperature.
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2.Chemical-Resistant Properties
"UPIA®" has excellent resistance to common organic solvents and metallic salt solutions, and it also demonstrates better resistance to acids and alkalis than conventional products.
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3.Storage stability
"UPIA®" has superior storage stability compared to conventional polyimide varnishes, while exhibiting a very low increase in viscosity at room temperature.
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4.Easy viscosity adjustment
"UPIA®" can be used at any desired concentration by diluting it with anhydrous NMP or DMAc (N, N-dimethylacetamide).
- #high heat resistance
- #chemical Resistance
- #PI varnish
- #coating
- #OLED
Applications
Seamless belt for printer/ Polyimide insulated wire/ High heat-resistant coating material/Flexible PV substrate/ Heat resistant paint/ Anti-corrosion paint
Information
| Type | Unit | UPIA®-AT （U-Varnish-A） |
UPIA®-ST （U-Varnish-S） |
測定条件 測定方法 |
|||
|---|---|---|---|---|---|---|---|
| 1001 | 1001 | ||||||
| Film thickness | µm | 20 | 50 | 20 | 50 | ||
| Solvent | ー | NMP | NMP | ||||
| Solid Content | wt％ | 18.0±1.0 | 18.0±1.0 | 350℃、30分 | |||
| Viscosity | Pa･s | 5±1 | 5±1 | E-Type、30℃ | |||
| Maximum heat treament temperature |
℃ | 350 | 450 | ||||
| Film properties |
Glass transition temperature Tg |
℃ | 274 | 278 | 322 | 324 | Dynamic viscoelasticity |
| 5% heat weight reduction temperature |
℃ | 592 | 599 | 619 | 620 | TGA | |
| Thermal linear expansion coefficient (50-200°C) |
ppm/K | 33 | 29 | 3 | 8 | Fine linear dilatometer |
|
| Tensile strength | MPa | 229 | 238 | 526 | 482 | ASTM D882 | |
| Elongation | ％ | 92 | 99 | 35 | 40 | ASTM D882 | |
| Tensile modulus | GPa | 3.7 | 3.7 | 9.8 | 9.3 | ASTM D882 | |
| Breakdown voltage | kV | 7.7 | 10.3 | 7 | 10.2 | ASTM D149 | |
| Volume resistivity | Ω･m | >1014 | >1014 | >1014 | >1014 | ASTM D257 | |
| Surface resistance | Ω | >1016 | >1016 | >1016 | >1016 | ASTM D257 | |
