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Light Cure Adhesives for Non Transparent Substrates

A large number of substrates are not transparent to light at all because they are made of a material that does not allow light to transmit (e.g. metals, ceramics, ferrites), or because they contain a non transparent additive (e.g. black, colour additives).

The versatility of light curable adhesives for use in bonding and tacking, potting and encapsulating, coating and sealing applications is further enhanced by products which have a secondary cure mechanism to ensure residual or complete cure in shadowed areas not reached by UV or visible light. For such joint confi gurations, light cure adhesives are available with secondary cure capability, effected by heat, moisture, activator or as anaerobic cure. Light cure adhesives offer benefi ts even when non transparent substrates are involved:

• Precise positional fi xturing of parts to be bonded
• Fast cure for high processing speeds and in-line quality control capability
• Reliable cure of exposed excess adhesive fi llets or squeeze-out
• Cure in shadowed areas over time by secondary cure

Applications:

Wherever fast cure of adhesive in fillets accessible by light offers a process benefit, e.g. for
• Fast fixturing of magnets, ferrites, ceramic parts …
• Fast positioning of parts in retaining joints …
• Fillet or surface cure, e.g. of post-applied product outside the bond area …

 
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