| abstract |
The invention relates to a polymer composition comprising a polymer and a radiation sensitive substance, which can be modified by means of irradiation in such a way that after the irradiation the part of the surface of the polymer composition that has been subjected to irradiation has a colour that differs from the colour of the surface that has not been irradiated. The polymer composition according to the invention is characterized in that the radiation sensitive substance absorbs radiation in the visible range, the near infrared region and/or the near ultraviolet region can be modified in different ways, so that on the surface of the polymer composition several, mutually different chromatic colours can be obtained. It has been found that the polymer composition according to the invention can be irradiated in a simple way such that on the surface several, mutually different, chromatically coloured markings can be obtained. It also appears that the texture of the surface of the polymer composition does not change to the eye as a result of the irradiation. In specific cases the gloss of the surface shows no or hardly any change at the place of the irradiation. After the irradiation the markings on the surface appear to be very heat, weather and light resistant under conditions of use. It further appears that the markings are wear and scratch resistant, corrosion resistant, dimensionally stable, free of deformation and well legible. Finally, the physical and mechanical properties of the polymer composition are hardly or not at all affected by the application of the marking. |