| 1 MINUTE READ

Painting Molded ABS

We are having a problem painting an ABS injection-molded part, with dark, cloud-like spots and long parallel splays. The defect is consistent in location on each molded part. Can you help?

Share

Facebook Share Icon LinkedIn Share Icon Twitter Share Icon Share by EMail icon Print Icon

Q. I am the quality specialist for a first-tier supplier to the automotive industry. In one of our product lines, we injection-mold parts, then paint and assemble them in this facility. We are having a problem painting an ABS injection-molded part, with dark, cloud-like spots and long parallel splays. The defect is consistent in location on each molded part. Can you help? J.C.

A. Although I worked with plastics many years ago, my area of expertise is organic coatings, not injection molding. Since the paint defect is in the same spot on every part, I believe you have a molding and not a painting problem. On the other hand, surface defects are often telegraphed through a coating. In that case, the problem can be solved by increasing the paint film thickness.  

Related Topics

RELATED CONTENT

  • 2020 Vision: The Future of Coatings

    The year 2020 will be here before you know it, signaling the beginning of a new decade and bringing changes to the world as we know it.

  • Masking for Surface Finishing

    Masking is employed in most any metal finishing operation where only a specifically defined area of the surface of a part must be exposed to a process. Conversely, masking may be employed on a surface where treatment is either not required or must be avoided. This article covers the many aspects of masking for metal finishing, including applications, methods and the various types of masking employed.

  • Preventing Solvent Pop

    Preventing solvent pop on an industrial paint line...