List of TOPAS® COC grades

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1. Introduction

TOPAS® COC is the trade name of a cycloolefin copolymer (COC) manufactured by TOPAS ADVANCED POLYMERS GmbH. It is an amorphous transparent resin having a cyclic olefin structure.

TOPAS is highly regarded in the market as a resin having heat resistance higher than PC (polycarbonate), dimensional stability superior to PMMA and PC, which originates from low water absorbability, etc. In addition, TOPAS has gained attention in the packaging material field as a material suitable for modification of conventionally used materials, such as improvements in water vapor barrier property and rigidity, and additions of heat resistance and easy-to-cut performance.

As TOPAS molding methods, injection molding, extrusion molding and blow molding are widely used. Here, we introduce the technologies of injection molding to realize its advantages.