LASER-MARKABLE POLYMER COMPOSITION

摘要

The invention relates to a polymer composition with improved laser markability, containing a polymer matrix material and at least one radiation-sensitive dye, which can change colour via a photo-thermal process by irradiation with laser light and is present in concentrated form in separate domains. An advantage of this is, that besides radiation-sensitive pigments also said radiation-sensitive dyes can be used to obtain a polymer composition with good laser markability, without other additives being necessary. The invention also relates to a method for the preparation of said polymer composition and a product that is made wholly or partially from the polymer composition. The invention also relates to a method for applying a marking on such a product by means of irradiation with laser light and to the marked product thus obtained.