_{* UV stabilisation is necessary if the finished products will be used outdoors, stored in open areas, or will be exposed to UV light. Plastic products undergo degradation when exposed to UV rays and oxygen simultaneously, resulting in discolouration and loss of mechanical properties. By using UV stabilisers, the physical and mechanical properties (impact strength, tensile and flexural modulus, etc.) and appearance of the product (colour, gloss) can be maintained.}