66 Nylon Resins 700485

The first part of this paper describes air and gasoline heat-aging tests on various type 66 nylon resins. The results are pertinent for evaluating the suitability of these nylons for automotive applications such as the emission control canister and the gasoline vapor-liquid separator.
In addition, data are presented to demonstrate that road salt caused no deterioration on test bars made from various 66, 610, and copolymer nylon resins which are in contact with galvanized zinc sheets in an acid environment.
The second part of this paper discusses a survey which was made of a variety of automotive parts made of 66 nylon and acetal homopolymer to determine their quality after extended service. Parts, including body, chassis, engine, and transmission components, were removed from high mileage cars. Parts were evaluated for changes in dimension and strength. Their general condition was found to be excellent.


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