3 Top Reasons There is a Shortage of Nylon 6/6

Worldwide Shortage of Nylon 6/6

There is currently a worldwide shortage of nylon 6/6 largely due to shortages of the key precursor adriponitrile or ADN. Nylon 6/6 is used extensively to make automotive parts, as well as cable ties, power tools, nylons, fabric, fasteners and is used in numerous industrial applications. Nylon 6/6 provides the best mix of processability, performance and value for the price.
Damage to ADN Processing Plants
Firstly, … Read more

History of the Screw

No one knows when the first screw was created but it is believed that by the first century it was used in a screw press. However, screw presses were known in Roman times to squeeze olives for oil and grapes for wine.  Archytas of Tarrentum is credited by the Greeks with the invention of the first screw.  However, Archimedes the Greek philosopher  is also credited with inventing the screw around 234 BC. The Archimedes screw was used in a water pump that employs a rotating helical chamber to cause water to move uphill. … Read more

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4 Thermal Properties of Plastics

Generally, there are four commonly used thermal properties of plastics: Heat Deflection Temperature, Continuous Service Temperature, Melting Point or for some, Glass Transition Temperature and Coefficient of Thermal Expansion.
Heat Deflection Temperature (ASTM D648)
Heat Deflection Temperature or heat distortion temperature (HDT) is the temperature at which a polymer deforms to heating or cooling under a specified load. ASTM stands for the American Society for Testing and Materials which is an international society that develops and publishes voluntary technical standards for materials among other things. … Read more

The Shape of a Machine Screw

So the screw in my reading lamp fell out and disappeared. I propped it up but from time to time it would let loose and crash down on my face. A trip to the hardware store was clearly in order.  Replacing the screw was easier said than done.  There are so many types. Different threads, head styles, lengths, drives and other criteria.  So what was that screw?
 
The Simple Screw
The screw is one of the six classical simple machines. … Read more