| 1 MINUTE READ

Pretreating Fiber-Reinforced Epoxy for Coating

Question: I am the manufacturing engineer in charge of painting.

Share

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

Question:

I am the manufacturing engineer in charge of painting. I need your help to perform the following task. I want to paint (spraying or brushing) a fiber-reinforced epoxy resin product with a polyurethane polymer coating. Can you recommend any methods of pretreatment for this surface to achieve good adhesion? Do operations like combustion spray, plasma spray or corona-discharge increase adhesion and are they suitable for this product? K. T.

Answer:

Epoxy resin surfaces are excellent substrates for painting. Therefore, painting fiber-reinforced epoxy products should present no insurmountable problems. As with any substrate, it must be clean (free from dirt and oily soils) before painting. However, I really don't see a need to use combustion spray, plasma spray or corona-discharge pretreatments to prepare the surface.

Since epoxy resin has excellent adhesion to most surfaces, product molds must be coated with a release agent. This mold release, which can be transferred to the molded product, must be removed before painting. Since release agents have many chemistries, I suggest contacting the release agent supplier for his recommendation for its removal.

 

RELATED CONTENT

  • Coating Thickness Measurement: The Fundamentals

    A review of available test methods, common applications and innovative instrumentation...

  • 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...