High Viscosity PA6.6 recomendation

DuPont Zytel 153 and 159 are Nylon 612 grades. Suitable grades for Nylon 66 in extrusion are DuPont Zytel 42A or ChemPolymer Chemlon 190. BASF and Lanxess do not have high viscosity Nylon 66 grades. Consider Nylon 6 as options for Nylon 66. BASF does have high viscosity Nylon 6 under their Ultramid trade name.

The IDES site is a good idea, but is daunting because of the sheer volume of data available. It led me to duPont's own site, where I couldn't find E53 but did find 153 as a general-purpose nylon 66, and also 159 as a high-viscosity 66 suitable for tubing. Maybe that's what Mike is looking for.
Unfortunately, duPont's data sheet did not include any indication of viscosity, and related values such as modulus and melt temp were the same for both these resins.
Mike, can you use nylon 6? If so, you have a lot more suppliers to choose from, and maybe even some money to save.
FirstBruce, re your question re thin-wall part, that applies to injection molding, where low viscosity helps fill molds. In extrusion it's the opposite, as high viscosity means more melt strength and easier forming of the extruded shape. As a result, extrusion grades are typically longer molecules = stronger, but injection can compensate with molded-in ribs and other thickness differentials.
ALGriff, Forum Moderator

Look at IDES website and find the "application" selection, go to "thick walled" applications, there are 8 selections. Or call up some nylon suppliers and ask for a recommendation. I don't know how a high viscosity nylon will fill a thin wall part, I would think a low viscosity material would be better suited?