Thermoplastic interlayer film

B - Operations – Transporting – 32 – B

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B32B 27/32 (2006.01) B32B 7/12 (2006.01) B32B 17/10 (2006.01)

Patent

CA 2339386

High clarity optical and safety glass laminate interlayer films and optical laminates are described. The films and their laminates comprise very low density polyethylene and/or its copolymers, preferably polymerized with metallocene catalysts, and modified with additives, such as coupling agents, clarifying or nucleation agents, UV-light absorbers, pigment or color concentrate, and IR-light blockers. The very low density polyethylene is laminated to EVA film for improved bondability in optical laminates.

La présente invention concerne des couches intermédiaires et des feuilletés optiques destinés à du verre de sécurité et présentant une grande transparence optique. Les couches et leurs feuilletés comprennent du polyéthylène de très faible densité et/ou ses copolymères, de préférence polymérisés avec des catalyseurs organométalliques, et modifiés avec des additifs, tels que des agents de couplage, de clarification ou de nucléation, des absorbeurs UV, un concentré de pigments ou de colorant, et des suppresseurs d'IR. Ce polyéthylène de très faible densité est feuilleté en un film EVA (éthylène vinyle acétate) offrant un pouvoir de liaison amélioré dans les feuilletés optiques.

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