Lasermarkable Engineering Resins

Abstract

Laser marking on plastics is growing in use. Bar codes and product lot data can currently be marked with lasers at high speeds on some commodity resins. However, of specific interest is the use of lasers to mark functional or decorative information on engineering resins. Laser marking is an excellent solution when problems in printing occur, or when there is a need for a truly indelible mark. This chapter focuses on the development of specialty grades of acetal copolymer that yield excellent sharp, clear images when laser marked. Specifically, grades have been developed for laser marking on general-purpose parts. Additional grades have been developed for laser marking on those applications requiring the utmost in ultra-violet (UV) light stabilization for both automotive and nonautomotive applications. The most common methods for marking plastics today still include ink printing. In contrast to ink printing, laser marking of plastics provides excellent images without contacting the surface. If an application calls for indelible, high resolution graphics, combining this new laser markable acetal copolymer resin with the Nd:YAG (Neodymium: Yttrium Aluminum Gamet) laser will produce the brightest, highest contrasting white marks on black molded parts that can be achieved in industry today. Equally important, this combination truly eliminates any problems associated with ink printing adhering onto acetal and removes any worry concerning the mark wearing off.