3M

About: 3M is a company organization based out in Saint Paul, Minnesota, United States. It is known for research contribution in the topics: Layer (electronics) & Coating. The organization has 7603 authors who have published 7907 publications receiving 254227 citations. The organization is also known as: Minnesota Mining and Manufacturing Company & 3M Company.

Alumina bonded abrasive for cast iron

Abstract: This invention concerns the discovery that sol-gel process alumina abrasive grain provides superior performance in bonded abrasives for grinding cast iron. In a preferred form it is disclosed that bonded abrasives of sol-gel process alumina abrasives in combination with other abrasive grains such as those of silicon carbide and fused alumina also provide superior grinding of cast iron.

Biocompatible porous matrix of bioabsorbable material

Abstract: A process for forming biocompatible porous matrices of bioabsorbable materials comprising: a) providing a bioabsorbable polymer; b) dissolving the bioabsorbable polymer in a volumetric orientation aid to yield a molten solution; c) solidifying the molten solution to yield an orientation matrix comprising first and second phases, the first phase being the bioabsorbable polymer and the second phase being the volumetric orientation aid; and d) the removing of the volumetric orientation aid from the solid orientation matrix; to yield a biocompatible matrix of bioabsorbable polymer. Also matrices formed by the process and devices made with such matrices.

Electrically-conductive pressure-sensitive adhesive and biomedical electrodes

Abstract: An electrically-conductive, pressure-sensitive adhesive composition having a polymeric matrix comprised of copolymers of hydrogen bond donating monomer (for example acrylic acid) and hydrogen bond accepting monomers (for example N-vinylpyrrolidone) is disclosed. The polymeric matrix is homogeneously mixed with an electrically-­conductive plasticizing solution comprised of from 0% to 98% by weight water-soluble, polar organic compound (for example glycerol), 2% to 100% by weight water, and 0 to 12% by weight water-soluble salt. The composition contains from about 12% to 50% by weight non-volatile copolymer matrix and the hydrogen bond donating sites on the copolymer matrix are froma bout 5% to about 95% neutralized. Free radical polymerization methods of making the composition and biomedical electrodes incorporating the composition are also described.

Coextruded pressure-sensitive adhesive tape and method of making

Abstract: A unified, composite tape structure is provided. The tape comprises two outer pressure-sensitive adhesive layers (16, 18) joined via melt processing. A method of making the tape comprising the use of melt processing is also disclosed. In the method a plurality of layers are melt processed and simultaneously joined to form the unified composite (10).

RF reactivatable marker for electronic article surveillance system

Abstract: A marker for use in radio frequency electronic article surveillance systems where the marker contains an inductive-capacitive resonant circuit and is made reversibly deactivatable and reactivatable by the addition of a piece of magnetic material and means, such as a piece of permanently magnetizable material, for biasing the first material to prevent alternating fields induced therein from changing the magnetic state of that material, thereby preventing hysteresis losses from causing a lowering of the Q of the resonant circuit below the point of detection.