Where a single step or process may occur, a series of sequential cleaning techniques are suitable for insufficient proof. In fact, the strength of the surface treatment procedure used for plastics depends on a variety of factors all of which need to be considered during product design.
1. Plastic type
Higher surface activity reduces the need for surface preparation. Some molded thermoplastic parts require high melt temperatures and rapid cooling cycles where coatings are easier to apply. Many thermosetting resin plastics, such as phenolic resins, are easily painted.
2. Surface pollution
The type and degree of contamination will determine the degree of cleaning required. Silicone release agents require stringent cleaning procedures on molded parts.
3. Initial and final strength requirements
Film adhesion develops faster on prepared and cleaned surfaces. Additionally, higher adhesion values are achievable with higher levels of surface cleaning.
4. Service environment
Better surface adhesion generally indicates a longer-lasting coating that is better suited to end-use conditions.
5. time
Delays between surface preparation and coating application often require re-cleaning by repeating preparation steps, or starting with a higher level of cleaning to overcome possible re-contamination.
6. Component size
In general, large parts are more difficult to machine than small parts, and certain processes are not suitable or available for large parts.
7. Cost
Certain constraints affect ready-to-use during the manufacturing/product cost cycle . Restrictions on surface preparation procedures can affect returns and warranty claims, costs that are often overlooked during the design phase.
