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Yellowing problem in Bonding layer

It is recently known that the Bonding layer of DVD-9 (Al/AgX) has a yellowing problem by aging under room light or sunlight.

The reason has not been ascertained yet, but the problem is probably caused by Ag or AgX, because it is seen in DVD-9 (Al/AgX) productions only.

Silver is known as active chemical and may be activated by room or sun light and reacts in some way with the bonding adhesive.

SD-694 and SD-698 are designed to prevent Silver activities and the yellowing problem.

These disks were exposed to sunlight for one week. The disk on the right is bonded with a conventional adhesive and clearly shows the Yellowing problem. The disk on the left, bonded with our SD-698, is clear.

SD-6068 for Silver-Alloy

DIC has started the commercial production of improved bonding SD-6068.

It has better performance than SD-698 in the fields:

• Cost
• PI error
• Curability
• Adhesion

Technical Information

    SD-6068
before curing:    
Viscosity:
Refractive Index:
   500 mPas
1,516
after curing:    
Tg
Modulus
    30°C
    50°C
    75°C
   100°C
 
Shrinkage on curing		   82°C
 
   1890 MPa
   1150 MPa
     390 MPa
       70 MPa
 
6,7%

Go to: UV-Kleber für DVD Products for Silver-Alloy layers