Kolon CPI™ Colorless Polyimide Films

Benefits

Transparency:

High transmittance > 89%

Low Yellow Index < 2.0 –> Colorless and High Transparency

Flexibility:

Low bending radius < 3R

Surface hardness > 2H –> High flexibility with superior surface hardness

High modulus > 6GPa –> Good flexibility with high mechanical properties

Temperature Stability:

Low coefficient of thermal expansion (CTE) < 15 ppm/°C

Hight glass transition temperature (Tg) > 330°C -350°C – process possible

General Characteristics

Properties of Kolon’s CPI™ Film

Grade A Grade B Grade C Grade D
Thickness (μm) 30 30 20 20
Transmittance (%) 88 90 88 88
Yellow Index <4.5 0.7 1.8 2.9
CTE(ppm/°C) 10 11 28 45
Tg (°C) >330 >330 >300 >300
Td1wt% (°C) >470 470 >450 >450
Surface Hardness 1H 2H >1H >1H
Tensile Strength (MPa) >300 >300 170 130
Elongation (%) <30 30 25 25
Modulus (GPa) >6 >6.5 5.3 4.5
Potential Application TFT Substrate Cover Window TSP Substreate FPCB

Kolon’s CPI™ Film with hardcoating for foldable mobile 

Item Unit CPI™ FILM HARDCOATING Remarks
High Flexibility High Hardness
Basic Property Thickness (Bare) µm 60 (50) 70 (50)
Adhesion 5B 5B Cross-Cut Tape Test
Optical Property Transmittance % 91.0 91.0
Yellow Index 0.6 0.6 ASTM E313
Mechanical Property Pencil Hardness 6H 8H 500gf
Steel Wool PASS PASS 1kg, 500 Cycles, Speed: 10cm/sec
Bending Radius Infolding R1 R1 Static
Outfolding R2 R3

Let’s discuss the possibilities

Interested in learning more?

Get in touch today to start a conversation about what you can do with Kolon CPI™
Colorless Polyimide Films, or to discuss further R&D with Kolon.

This technology (KL-0001) is owned by Kolon Industries, Inc. with intellectual property management and marketing support from Fuentek, LLC.