GIESSFORMEN AUS AROMATISCHEN POLYMEREN MIT VERÄNDERTER OBERFLÄCHENBESCHAFFENHEIT UND VERFAHREN ZUR HERSTELLUNG

摘要

These aromatic polymer mouldings having modified surfaces are specifically produced by irradiation of the surfaces of aromatic polymers with UV laser light. The conditions for laser light irradiation are as follows: (a) the wavelength of the irradiating laser light lies between 150 and 380 nm, (b) the intensity of the laser light is 10 power 4 W/cm2, and (c) the fluence is lower than the threshold value. Condition (c) can be replaced by conditions (c') and (d). (c') the fluence should be 300% of the threshold value or less. (d) the irradiated part of the surface should change its colour. Polymers suitable for this invention are aromatic polymers or polymer compositions contg. 20 wt.% or more of an aromatic polymer. The aromatic polymer is at least one polymer chosen from among aromatic polyester, aromatic polyether ketones, aromatic aromatic polysulphides, etc. These polymers are practically linear and have at least one aromatic hydrocarbon ring such as benzene, naphthalene, anthracene, diphenyl, in their repeat units. The aromatic polymer mouldings can be film, sheet, plate or board.