Particulate transfer film with improved bead carrier

Details Particulate transfer film with improved bead carrier Particulate transfer film with improved bead carrier

G - Physics

02

B

G02B 5/128 (2006.01) B29D 11/00 (2006.01)

Patent

CA 2494202

A transfer film configured for transferring optical beads to a substrate is disclosed. The transfer film typically contains optical beads (68), a temporary bead carrier layer (62) retaining the optical beads, and an optional adhesive layer (74) configured to permanently adhere the optical beads to a substrate. The temporary bead carrier layer contains a carrier backing (64) and a heat-resistant carrier coating (66) that temporarily holds the beads during application at elevated temperatures to a substrate. The carrier coating is formed such that it initially softens to retain the beads, but is then hardened or thermoset (such as by crosslinking) to prevent the carrier coating from softening during transfer of the beads to a substrate.

L'invention concerne un film de transfert conçu de manière à transférer des billes optiques sur un substrat. Le film de transfert contient généralement des billes optiques (68), une couche support de billes temporaire (62) destinée à retenir les billes optiques, et une couche adhésive facultative (74) conçue de manière à faire adhérer de façon permanente les billes optiques sur un substrat. La couche support de billes temporaire contient un renfort support (64) et un revêtement support résistant à la chaleur (66) qui maintient temporairement les billes lors de l'application sur un substrat à des températures élevées. Le revêtement support est formé de manière à, tout d'abord, ramollir la surface en vue de retenir les billes, puis à la durcir ou à la thermodurcir (notamment par réticulation) en vue d'empêcher le revêtement support de se ramollir au cours du transfert des billes sur un substrat.

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