Re: Nylon 6 Brittle parts
Unfortunately Nylon is a hygroscopic material. It will dry out and become brittle. In the past I have worked at places where we had to add water to the parts just before shipping so this would not happen. It has been a long time since I worked with nylon so maybe someone can suggest an additive or possible an alloy to help you. I would talk to your material rep on this issue.
Re: Nylon 6 Brittle parts
We are using climatic chamber where we put parts after molding on 24h, 90% humidity and 55C. After process they are more flexible and harder to brake.
So far we have good resaults with this metod.
Re: Nylon 6 Brittle parts
Equally important is to make sure you are not over drying the material prior to production. A nylon 6/6 or heat stabilized nylon may yield better performance.