Oxygen scavenging monolayer bottles

B - Operations – Transporting – 65 – D

Patent

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Details

B65D 1/02 (2006.01) C08G 81/02 (2006.01) C08L 53/00 (2006.01) C08L 67/02 (2006.01) C09D 153/00 (2006.01)

Patent

CA 2463079

Monolayer packages comprised of an oxygen scavenging composition suitable for direct contact with package contents and recycle with other polyester bottles are disclosed. The oxygen scavenging composition is comprised of a modified copolymer which is comprised of predominantly polyester segments and an oxygen scavenging amount of oxygen scavenging segments. The polyester segments comprise segments derived from typical bottling and packaging polyesters such as PET and PEN. Use of these oxygen scavenging copolymers in bottles provides a clear and rigid monolayer bottle similar in appearance to unmodified polyester bottles. In a series of preferred embodiments, bottles fabricated with the oxygen scavenging copolymers of this invention are over 99 wt% PET and contain less than 50 ppb of extractable components.

L'invention concerne des emballages monocouches fabriqués à partir d'une composition désoxygénante permettant le contact direct avec le contenus des emballages, et pour permettre le recyclage avec d'autres bouteilles en polyester. La composition désoxygénante est constituée d'un copolymère modifié qui comprend essentiellement des segments de polyester et une quantité désoxygénante de segments désoxygénants. Les segments de polyester comprennent des segments provenant de polyesters d'emballage et de soutirage en bouteilles typiques, tels que le polyéthylène théréphtalate (PET) et le polyéthylène naphtalate (PEN). L'utilisation de ces copolymères désoxygénants pour la fabrication des bouteilles permet d'obtenir une bouteille monocouche transparente et rigide semblable, en apparence, aux bouteilles en polyester non modifié. Dans plusieurs modes de réalisation privilégiés, les bouteilles fabriquées avec les copolymères désoxygénants décrits dans cette invention sont constituées de 99% en poids de polyéthylène théréphtalate et elles contiennent moins de 50 ppb de composants extractibles.

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