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Products Silicone OCA

A silicone Optical Clear Adhesive (OCA) that fills air gaps between components in LCD displays, improving brightness and contrast. It is highly resistant to yellowing and shows excellent long-term performance. We sell OPT Alpha GEL in sheets, making it both easy to handle and highly reworkable.

Characteristics
Made of high-grade silicone, this OCA boasts superior physical properties, providing stable performance.
OPT Alpha GEL shows minimal yellowing when exposed to heat and UV radiation. It has low temperature dependence, allowing OPT Alpha GEL to thrive at a wide range of temperatures.
OPT Alpha GEL retains elasticity and reduces stress on display components. This contributes to a more uniform displayed image and improved shock resistance.
Displays can be reworked after bonding with OPT Alpha GEL, improving yields and reducing cost.
OPT Alpha GEL is available in thicknesses between 0.175 mm and 1.8 mm.
Application Example
Inserting OPT Alpha GEL between an LCD unit and the cover lens has many benefits, such as improved shock resistance, stress mitigation, increased contrast, reduced parallax, and improved luminance.
Technical Information

[Transparency (yellowing) long term reliability data (temperature testing)]

[Transparency (yellowing) long term reliability data (UV irradiation testing)]

Product・Packaging

Product Details

*Please swipe left or right to view table below.

[Properties of OPT Alpha GEL]

Item Part No. Remark
K120E K95E
Appearance - Colorless
Transparent
Colorless
Transparent
-
Hardness Needle Penetration
(1/10mm)
120 95 JIS K 2207
Young's Modulus kPa 22 48 -
Refraction Index 23、589nm 1.41 JIS K 7142 ASTM D 542*2
Transmittance*1 % Over 91(Over 99) Spectrophotometer*2
b*1 - 0.14 0.20
Haze % 0.24 0.42 JIS K 7136*2
Peel
Strength(Liner)
peel1 (N/20mm) 0.05 0.03 JIS Z 0237
Peel off by 90 degrees.
(Measured in 24hours
after lamination)*2
peel2 (N/20mm) 0.70 0.50
Peel Strength(Glass) peel3 (N/20mm) 14.1 13.2
peel4 (N/20mm) 13.5 7.9
Peel Strength(PMMA) peel3 (N/20mm) 10.5 13.2
peel4 (N/20mm) 4.1 5.4
Peel Strength(PC) peel3 (N/20mm) 6.2 7.3
peel4 (N/20mm) 3.3 5.3
Peel Strength(PET) peel3 (N/20mm) 7.2 9.0
peel4 (N/20mm) 3.5 4.8
Peel Strength(Polarizer) peel3 (N/20mm) 6.8 8.5
peel4 (N/20mm) 3.1 4.1
Specific Gravity - 0.98 0.98 -
Item
Appearance -
Hardness Needle Penetration
(1/10mm)
Young's Modulus kPa
Refraction Index 23、589nm
Transmittance*1 %
b*1 -
Haze %
Peel Strength
(Liner)
peel1
(N/20mm)
peel2
(N/20mm)
剥Peel Strength
(Glass)
peel3
(N/20mm)
peel4
(N/20mm)
Peel Strength
(PMMA)
peel3
(N/20mmm)
peel4
(N/20mm)
Peel Strength
(PC)
peel3
(N/20mm)
peel4
(N/20mm)
Peel Strength
(PET)
peel3
(N/20mm)
peel4
(N/20mm)
Peel Strength
(Polarizer)
peel3
(N/20mm)
peel4
(N/20mm)
Specific Gravity -
Item Remark
K120E K95E
Colorless
Transparent
Colorless
Transparent
-
120 95 JIS K 2207
22 48 -
1.41 JIS K 7142 ASTM D 542*2
Over 91(Over 99) Spectrophotometer*2
0.14 0.20
0.24 0.42 JIS K 7136*2
0.05 0.03 JIS Z 0237
Peel off by 90 degrees.
(Measured in
24hours after
lamination)*2
0.70 0.50
14.1 13.2
13.5 7.9
10.5 13.2
4.1 5.4
6.2 7.3
3.3 5.3
7.2 9.0
3.5 4.8
6.8 8.5
3.1 4.1
0.98 0.98 -

*1 Transmittance; External transmittance including surface reflection. (Internal transmittance except surface reflection)
*2 K120E: Thickness t0.5mm, K95E: Thickness t1.8mm.
※Silicone oil may bleed depending upon conditions.
※Low molecular siloxane is included in this product which basically composed of silicone.
※Above data are measured data, not guaranteed specifications.

Product Map

Product Thickness
(mm)
Hardness
<Needle Penetration>
K120E t0.175/t0.2/t0.3/t0.5/t0.8/t1 120
K95E t1.2/t1.5/t1.8 95

Notes

  • ・Vacuum lamination method is recommended with OPT Alpha Gel. (Please contact us regarding details of the lamination method.)
  • ・Please contact us regarding cutting of OPT Alpha Gel.
  • ・6 inch core. PET liner (surface treated)
Customization
We also develop custom products to meet our customers’ individual needs. Contact us today!