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i mean how do they do it?

2007-03-26 15:02:36 · 3 answers · asked by Jesus Freak 2 in Business & Finance Other - Business & Finance

3 answers

The adhesive that allows the little notes to be stuck, unstuck, and restuck was discovered nearly 35 years ago. Sticky notes weren't readily available throughout the U.S. until 1980.

Back in 1968, Spencer F. Silver, a chemist working on pressure-sensitive adhesives for 3M, found that when an acrylate copolymer was made in a particular way, it formed a suspension of cross-linked microspheres. The microspheres didn't dissolve in solution, but instead swelled to twice their original diameter.
Silver says that the "pasty mass" of microspheres could simply be sprayed or coated on a surface without clumping. Once sprayed on, the solvent quickly evaporated and the microspheres returned to their original size.

The key to the adhesive is that it forms a sparse monolayer. Viewed with a scanning electron microscope, the adhesive has a pebbled surface, a bit like the surface of a basketball. By comparison, the adhesive on a piece of permanent tape looks flat and featureless under the same degree of scrutiny.

Although he didn't have any particular product in mind when he made the adhesive, Silver knew that he had something special.
3M spent years trying to develop an application for the adhesive, and at one point came up with a sticky bulletin board coated with the glue. However, dust and dirt eventually built up on the board, diminishing its sticking power as well as its popularity.
Then, in 1974, Art Fry turned the concept around and transformed the world into a bulletin board."

Legend has it that Fry, a chemical engineer for 3M, was singing in his church choir when he hit upon the idea for a removable sticky bookmark. He remembered Silver's glue, and the sticky note, or Post-it note, as it would come to be known at 3M, was born.

2007-04-02 04:23:10 · answer #1 · answered by Anonymous · 0 0

3 M was experimenting with semi sticky glues . they came up with the idea of easy to remove notes . go to 3M web site

2007-03-26 15:10:55 · answer #2 · answered by Anonymous · 0 0

they make from tablet pc which laptop with pen as input device
i can make handwriting through this pen, which sticky notes do
search in google or yahoo for tablet pc overview

2007-03-26 15:06:56 · answer #3 · answered by yoyox_34 2 · 0 0

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