Engineering Plastics for Food & Beverage Processing: Compliance and Material Guide

Surviving CIP Cleaning and Steam

Clean-in-place (CIP) routines expose plastics to caustic soda, nitric acid, and 121°C steam. Natural PEEK handles repeated steam cycles without hydrolysis; POM-C resists most cleaning agents but should not see sustained strong alkali; PTFE resists essentially all CIP chemistry. Matching the material to the cleaning regime prevents premature replacement and contamination risk.

Why Replace Stainless Steel?

Plastic guides and wear parts run dry or with minimal lubrication, eliminating food-safe lubricant costs; they cannot seize or gall against product contact surfaces; and they cut noise on high-speed lines. Weight reduction also simplifies changeovers and reduces drive loads.

Hygienic Design Considerations

Material compliance is only half the story — the shape and installation of plastic components decide whether a line can actually be kept clean. Design parts and mounting arrangements so that product contact surfaces are smooth, continuous, and free of crevices where residue can build up. Use generous radii instead of right angles wherever guides meet frames, and prefer tool-free, quick-release fittings so components can be lifted out for inspection during changeovers. Colour-coding by line or product type helps operators spot misplaced parts instantly, while blue detectable grades make any fragment visible against food matrices. Finally, set a documented inspection interval for wear parts such as guide rails and star wheels: replacing them on schedule costs far less than a contamination incident or an unplanned line stop.

For more on compliant materials, see our Engineering Plastic Certifications guide and POM Plastic Sheet Properties guide.