| 摘要 |
<p>PURPOSE:To increase the adhesive strength of ink and ensure high-speed marking by making the marking after O2 plasma etching pretreatment of seal resin surface. CONSTITUTION:In O2 plasma etching, excited O2 hits resin surface so that spattering occurs and at the same time a volatile compound such as CO2 is generated to activate resin surface. Since resin surface is improved in wetting characteristic, therefore, no shortage occurs to the adhesion of ink. After pretreatment, a number of markings are made at a time using ultraviolet ray-hardening ink for example and the resin surface is hardened. This construction ensures high speed marking.</p> |
