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Adhesives
Adhesives
Manufactured Products
 
Humidity-Resistant Optical Adhesive
(AT6001, AT8224, AT8378)

Moisture Resistant adhesiveness AT8378 has been discontinued


Fig.Shearing adhesion strength and Bending adhesion strength


Moisture Resistance of Bonded Area of Pyrex® Glass

 

Testing time (h) at 75, 90% RH

Adhesive

500

2000

3000

5000

AT6001

AT6177

Commercial product-1

Commercial product-2


Commercial product-1,-2:UV acrylate x:Peeling occurred


How to Test Moisture Resistance of the Bonded Areas

Fig. Test method for the moisture resistance of the bonded area

Close-up Views of the Optical Fibers

Fig.
Peeling condition of optical fiber

Results of Moisture Resistance Testing of the Bonded Areas

 

at 75, 90% RH

Testing time (h) at 121, 100% RH

Adhesive*

Tg ()

1000

2000

3000

5000

1

5

10

20

T6001

1.51

-3

0/5**

0

0

0

0/3

0

0

0

AT6001 High-Tg version

1.51

92-109

-

-

-

-

0/44

0

0

0

A4

1.52

155

1/5

5

-

-

3/3

-

-

-

A5

1.48

51

3/5

3

5

-

3/3

-

-

-

E2

1.49

130

-

-

-

-

3/3

-

-

-


*AT6001 and its high-Tg version: Highly durable acrylic UV-curable optical adhesives
A4, A5: General-purpose acrylic UV-curable optical adhesive
E2: General-purpose epoxy UV-curable optical adhesive
** Number of samples in which peeling occurred at fibers/Total number of adhesive samples


Main properties of Humidity-resistant optical adhesive
for bonding optical waveguide(AT6001, AT6001 High Tg products)

Name (Main Components)

 

AT6001 (Acrylate)

 

AT6001 High Tg products

 

AT8224 (Acrylate)

 

AT8378
(Acrylate)
DISC

 

AT6390
(Acrylate) (reference only)

Conditions

External appearance

 

Transparent

 

Light amber

 

Light amber

 

Light amber

Viscosity (cP) [25]

 

440

 

180

 

390

 

840

Curing

Curing Time (min)

 

10 *1

 

10 *1

 

10 *1

 

10 *1

Shrinkage during curing (%)

 

6

 

9

 

8

 

10

Properties after curing

Glass Transition Temperature ()

 

- 4 ~-3

 

111

 

86

 

100

Refractive index

 

1.51

 

1.51

 

1.50

 

1.51

Optical transmittance (%)
[ = 1.3m, 1mm]

 

90

 

83

 

89

 

90

Adhesion Strength
(kgf/cm2)[Glass]

 

>150

 

122

 

> 89

 

156

Thermal expansion coefficient ( )

 

2

 

2

 

2

 

1

Modulus( dyn / cm2) [25]

 

1

 

5

 

9

 

80


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

*1 UV irradiation : 10mW/cm2 (365nm) Heat treatment : 50 ~ 60 for 30 ~60min


 

 
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