Developed product Polycarbonate-Compatible Adhesive Film
Transcript of Developed product Polycarbonate-Compatible Adhesive Film
Polycarbonate-CompatibleAdhesive Film
GUNZE Limited Electronic Components Division
UV cutting
Outgas-resistant
Bending durability
Acid-free
Thickness
Total light transmittance
Haze
Adhesive strength*With glass, units: N/25 mm
Adhesivefunction
100μm
90.1 %
0.6 %
8.4(12.7)
175μm
90.5 %
0.6 %
9.3(13.2)
Outgas-resistant OCA Measurement method
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CSA117 CSA128
JIS K7361-1*
JIS K7136*
Conforms to JIS Z0237
Model no.
Outgas-resistant OCA (adhesive film for polycarbonate)
Ordinary OCA (Optical Clear Adhesive) film is designed assuming it will be bonded to PET film or glass. Therefore, it is not suitable for bonding with resin sheets such as polycarbonate or acrylic. Outgas-resistant OCA developed by Gunze can be used to bond with a variety of materials including not only PET films and glass, but also acrylic and polycarbonate.
Adhesive films used in display components have a direct effect on display performance, and thus require characteristics like optically uniform transparency, and no occurrence of peeling or bubbles. Gunze is working to solve these problems and enhance the function of adhesive film, and as an example of multi-function OCA, we offer adhesive film with outstanding outgas-resistant functionality (compatible with polycarbonate).
*The above are measured values, not guaranteed values.
*Figures in parentheses are numeric values for bonding with polycarbonate
*Measurement composition: Film / Adhesive layer / Glass
【Basic composition】
OCA
Glass
Polycarbonate filmAcrylic film
Plastic substrates such as acrylic and polycarbonate have high water absorbency, and moisture contained in the substrate may turn into gas due to changes over time, or changes in the environment. This is called "outgas." For this reason, a special-purpose OCA must be selected when bonding plastic substrates with a high level of outgas. Gunze's outgas-resistant OCA suppresses bubbles and peeling attributable to outgas.
Outgas-resistant OCA has been provided with an ultraviolet (UV) cutting function, a combination of features previously believed to be difficult to achieve. The film protects the underlayer from ultraviolet degradation, and is also outstanding for improving light-fastness.
In terms of applications, OCA is primarily used for bonding the electrode film used in touch panels. This electrode film is composed of a metal film called ITO, and metal wire made of material like silver. Metal corrosion is prevented by making the primary materials of OCA acid free. Gunze OCA is designed to provide acid-free function, while also maintaining adhesive strength.
No bubbles! UV cutting function! Acid free!
Outgas-resistant
OCA Conventional
OCA
Testcomposition
Conditon photo Condition photoPolycarbonateOutgas-resistant OCA
Glass
No air bubbles or peeling Air bubbles and peeling occer
Condition:85℃/90%R.H.×500hr
PolycarbonateConventional OCA
Glass
1 2 3
1009080706050403020100340 350 360 370 380 390 400 410 420
Tran
smitt
ance
(%)
Wavelength(nm)
Spectral transmittance
General adhesive
Outgas-resistant OCA
Developed product