PermaWrap sleeve compare to paint or elastomeric coatings?
The failure mode for a coating has more to do with shear strength while the failure mode for PermaWrap has to do with inter-laminar fracture toughness. In relation to elongation, most paints have at least 6% while elastomeric coating can have up to 200%. The PermaWrap sleeve typically has approximately 1% elongation and the adhesive has approximately 40% elongation. Although the cured PermaWrap system will typically have a higher impact toughness than the coatings, it is advisable that the PermaWrap be inspected whenever the coating shows evidence of impact. Back To Top 31. Does the ferrous metal cloth expand at a different rate than the reinforcing fiber? The Coefficient of Thermal Expansion (CTE) for the glass reinforcing fiber is 5.4×10^-6 (in/in/F) or .0000054. The CTE for the ferrous metal cloth used in the sleeve for MFL Smart Pig detection is 5.7×10^-6 (in/in/F) or .0000057. This difference is negligible. Examples of similar applications are glass fiber reinforced pipe, composit
