Abstract

Polypropylene (PP) is a relatively stable material chemically and the most light in all of plastics, whose specific gravity is 0.9. Moreover, it has a high tensile strength and elasticity. Therefore, it is used widely for engineering plastics. However, this material is lack in dyeing or adhesion. As the surface is chemically stable and shows a hydrophobic property, the adhesiveness of the surface is very poor; therefore, its surface modification has been needed. In general, a surface modification of polypropylene has been carried out by chemical treatment by using a chromic acid mixture.¹,² However, a chromic acid mixture causes an environmental pollution; the use will be limited in the future. Therefore, we have previously reported the excimer laser induced photochemical surface modification of a teflon or a polyethylene.^3,4

© 1995 IEEE