Foldable Display Hard Coating Material/Film

       In 2016, D&P transferred the hard coat recipe from ITRI (Industrial Technology Research Institute), and the recipe is successfully applied for the Foldable AMOLED cover with on-cell touch module during Touch Taiwan exhibition in 2017 and 2018 and shows excellent pencil hardness, anti-friction and folding ability on PI substrates.

       Cooperated with China AMOLED manufacturers, D&P has been providing serials of samples by customers’ demands since 2016.



l  Foldable Hard Coat Film Specification

Model No.

C50K66

E50N05

E50N55

E50T23

 

 

Substrate

CPI

PET

PET

PET

 

Thickness

Substrate

um

50±1

50±1

50±1

50±1

ASTM D3652

HC

um

5±1

5±1

5±1

5±1

ASTM D3652

Back coating

um

1

-

9±1

8±1

ASTM D3652

Optical
properties

Total Transmittance

%

90

91.08

91.38

91.37

JIS K 7361

Haze

%

0.96

0.98

0.98

0.99

JIS K 7136

YI(D65)

 

1.04

0.74

0.74

0.79

ASTM E313

Color b*

 

1.07

0.41

0.41

0.43

JIS Z8722

Surface Properties

Pencil Hardness(1)

g/H

4H

H

H

2H

ASTMD3363-00

Abrasion(2)

2500

OK

OK

OK

OK

JIS R3257

(No Visual Scratch)

Adhesion

B

5B

5B

5B

5B

ASTM D3359

Contact angle
of HC side

110°

110

112

112

113

JIS R3257

Contact angle
of HC side
(After abrasion)

100°

101

104

105

106

JIS R3257

Contact angle
of Back coating side

 

40°~50°

75°~80°

40°~50°

40°~50°

JIS R3257

Flexibility (mm)

Inward

R1.5 200K OK

R1.5 200K OK

R1.5 200K OK

R1.5 200K OK

 

Outward

R3 200K OK

R3 200K OK

R3 200K OK

R3 200K OK

 

Warpage (Size 8")

 

Bare film<2mm

 

(1) Mitsubishi pencil @750g, 50mm @ 60mm/min
(2) #0000 BonStar steel wool@ 1kg, 40mm@ 40 cycle/min, indenter size of 20mm*20mm       




l  Related equipment and facility

Optical test

Abrasion

resistance

 

 

 

Bending test

Contact angle test

 

 

 

Pencil hardness test

UV curing

 

 

 

Tunnel oven

50KG mixing tank