a multi - layered plastic sheet comprising of a first layer composed of a copolymer obtained by reacting a dimethyl terephthalate or terephthalic acid with a mixture of 99 - 55 mole % ethylene glycol and 1 - 45 mole % cyclohexane dimethanol wherein the first layer is covered on at least one surface with a 2 to 100 μm thick uv - absorbing second layer composed of the copolymer of the first layer and a uv - absorbing additive . the uv - absorbing additive can be a benzophenone compound or a benzotriazole compound .