The two most commonly used polyamide grades by far are PA6 and PA66. The remaining members of the polyamide family are primarily used in applications that require unusually high service temperatures or tolerance of moist conditions. Bio-based and transparent (amorphous) PA grades are also available. In machine design purposes PA is often reinforced with glass or - in case of highly demanding applications - with carbon-fiber. Reinforcement changes the characteristics of the material and its applications considerably and therefore I’ll write a separate article on them later. This article focuses on unfilled PA6 and PA66.
He says he has calmed down, however. “It’s just from having a number of years playing at the top level. It is a technical sport but you also just need experience. We’re lucky in the front row where you can keep getting better the older you get. “Sometimes my focus has been lacking because it’s very easy to get carried away with the emotion of the game, especially at Test level where you’re playing in front of enormous crowds and playing the anthem at the start. It’s very easy to lose focus and not do the right thing at the right time. Over the years I’ve learned to stop getting carried away so much and just make sure I’m switched on at the right times.”
Explain to students that they just went through the littleBits Invention Cycle. They created a first prototype, Played with it to see how it worked, then Remixed it with adjustments, improvements, and perhaps tried a few totally different approaches. After a lot of experimentation and comparison, they got to Share their results with others, collecting feedback and inspiration. Lots of designers and engineers have a process they go through when inventing. This is the process the team at littleBits uses when they create new Bits and Kits. The students will also be using it when they complete their littleBits challenges.