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Adhesives

Manufactured Products

Adhesive For Fiber Array
(AT3925M, AT9390)

Application: For fixing optical fibers in V-grooves

Fig. Cross sectional view of typical application

Fig. Typical Fiber Array

Ultra Hard, Heat-Resistant UV-Curable Adhesive(AT3925M)

Features

The elastic modulus remains high at elevated temperatures ( dyn/cm2 or more at 150).
Capable of resisting temperatures as high as 200 or more (glass-transition temperature, Tg>200).
Hard enough to be cut and polished.

Fig. Comparison of Elastic modullus between AT3925M and other products.

Main properties of : AT3925M and AT9390

Name (Main Components)			AT3925M (Epoxy)	AT9390 (Epoxy)
Conditions	External appearance		Light amber, transparent	Light amber, transparent
	Viscosity (cP) (25)		284	600
Curing	Curing Time (min)		10 *1	10 *2
	Shrinkage during curing (%)		4	4
Properties after curing	Glass Transition Temperature ()		233	131 ~ 137
	Modulus ( dyn/cm2)	25	1.3	0.97
		150	0.73	0.83
	Refractive index		1.520	1.495
	Optical transmittance (%) [ = 1.3m, 1mm]		88	86
	Thermal expansion coefficient ( )		7	8~9
	Adhesion Strength (kgf/cm2)[Glass]		>181	>125

(Note)
This property data is a measured value on samples instead of the guaranteed value.

*1 UV irradiation : 30mW/cm2 (365nm) Heat treatment : 100 ~ 150 for 1 ~ 2h
*2UV irradiation : 30mW/cm2 (365nm) Heat treatment : 100 for 2h