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Visualizzazione post con etichetta Things. Mostra tutti i post

martedì 15 febbraio 2011

Cyanoacrylate (Loctite Super glue - Attak)

Cyanoacrylates were invented in 1942 by Dr. Harry Coover and Fred Joyner of Kodak Laboratories during experiments to make a transparent plastic suitable for gun sights. Although not appropriate for the gun sights, they did find that cyanoacrylates would quickly glue together many materials with great strength. Seeing possibilities for a new adhesive, Kodak developed "Eastman #910" (later "Eastman 910") a few years later as the first true "super glue."



During the 1960s, Eastman Kodak sold cyanoacrylate to Loctite, which in turn repackaged and distributed it under a different brand name "Loctite Quick Set 404." In 1971, Loctite developed its own manufacturing technology and introduced its own line of cyanoacrylate, called Super Bonder. Loctite quickly gained market share and by late 1970s it was believed to have exceeded Eastman Kodak's share in the North American industrial cyanoacrylate market. Other manufacturers of cyanoacrylate included Permabond Division of National Starch and Chemical, Inc., which was a subsidiary of Unilever. Together, Loctite, Eastman and Permabond accounted for approximately 75% of the industrial cyanoacrylate market.

US Patent 2,768,109

domenica 7 novembre 2010

Loctite Superattak FlexGel commercial



Superattak FlexGel is a special kind of glue known for its resistance properties, it allows to join different kind of materials such as wood, cork and plastics for example

Oleophobic Screen

The 3GS iPhone has a coating that helps you leave no, well hardly any, prints or fingerprints. The glass screen is coated with a polymer, a plastic that human skin oil doesn't adhere to very well. People in the chemical bonding business like to call the finished surface "oleophobic."

Funny name. Serious Stuff



This is an ad of Banana Boat Ultra, a lotion that screens from UV rays, we think that is an interesting example of the dichotomy Resistant / Weak through the metaphor of the temptation

mercoledì 3 novembre 2010

Honey/Non-Newtonian fluid

A non-Newtonian fluid is a fluid whose flow properties differ in any way from those of Newtonian fluids. Most commonly the viscosity of non-Newtonian fluids is not independent of shear rate or shear rate history. However, there are some non-Newtonian fluids with shear-independent viscosity, that nonetheless exhibit normal stress-differences or other non-Newtonian behavior.


To understand this phenomenon, you can put slowly a spoon in a honey jar, it sinks easily as the honey moves around it/away from it. If you put the spoon in much faster, it seems to almost tense up and is harder to do so.The non-Newtonian fluid is resistant to high impacts but weak to a constant low force, like we can see in the video: