Hotmelt adhesive for bonding dvds

Details Hotmelt adhesive for bonding dvds Hotmelt adhesive for bonding dvds

G - Physics

11

B

G11B 7/26 (2006.01) G11B 7/256 (2006.01)

Patent

CA 2283729

The invention relates to hot-melt adhesives with a hot-melt viscosity of over 100,000 mPas at 160 ~C. Said adhesives are suitable for gluing (5) substrate halves (2, 3) during the production of digital versatile discs (DVD) exhibiting considerable procedural advantages in comparison with known UV hardening adhesives. In a pigmented embodiment, said adhesives combine the following three functions: they enable adhesive bonding, provide anti- corrosion protection of the metal reflecting layer (4) and form a covering background for a printed pictorial layer (6).

Des adhésifs à fusion ayant une viscosité en fusion de plus de 100.000 mPas à 160 ·C conviennent au collage (5) de moitiés de substrats (2, 3) lors de la production de disques versatiles numériques (DVD) et présentent des avantages déterminants en termes de procédé comparativement aux adhésifs connus durcissant sous l'effet des U.V. Dans leur variante pigmentée, ils associent les trois fonctions suivantes: assemblage par collage, protection anticorrosion de la couche réflectrice métallisante (4) et arrière-plan couvrant d'une couche d'impression figurée (6).

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