Ticona launches next-generation COC for multilayer films

Ticona has enhanced its Topas COC (cyclic olefin copolymer) to give blown film producers greater processing flexibility and the ability to make highly transparent films that are practically free of gels.

Ticona has enhanced its Topas COC (cyclic olefin copolymer) to give blown film producers greater processing flexibility and the ability to make highly transparent films that are practically free of gels. The company claims that the new Topas 8007F-400 is an excellent choice for multilayer films in which it may be used in discrete or COC-rich layers. In blown films, it can be used in applications such as pouches, flow-pack, lidding and twist wrap. Topas 8007F-400 is a clear cycloolefin copolymer that adheres well to polyolefins, especially linear low-density polyethylene, can be metallised and coloured easily, and has an inherent moisture barrier that can extend product shelf life. It also has good thermoforming characteristics, a modulus of 2,500 MPa and a glass transition temperature of 80°C. Ticona claims that when used in a multilayer blown film for twist wrap applications, it provides excellent stiffness, twist retention and dead fold. Unlike Cellophane, they do not need a moisture barrier coating and offer overall cost benefits.