Raymond Charles Srail - Parma OH Richard August Glover - Brookpark OH Thomas Raymond Szczepanski - North Royalton OH Eric Martin Weissman - Chagrin Falls OH Frederic William Kunig - Akron OH
Assignee:
Flexmag Industries, Inc. - Marietta OH
International Classification:
H01F 720
US Classification:
335284
Abstract:
A process and apparatus for permitting the magnetization of flexible hard magnetic materials in the form of sheets or strips, such as magnetic rubber, wherein opposing arrays formed from alternating magnetic disks and flux conducting elements are use in sets of two with opposing polar moments such as to induce a magnetic flux in the gap between the discs. The width of the magnetic disk and flux conducting elements, respectively, are selected to optimize the magnetic pull strength of the material. At the array ends are flux conducting elements that are about 1/2 (i. e. , from about 0. 25 to about 0. 75, and preferably from about 0. 4 to 0. 6) of the width of the internal flux conducting elements. A material to be magnetized is passed between the array sets in contrast with both disks and consequently imprinted with magnetic poles. The magnetized properties of the material is enhanced by passing the material through a second set of arrays which are axially offset with respect to the first set of arrays.
Single Phase Shape-Transformable Elastomeric Compounds
Tiong H. Kuan - Hudson OH Raymond C. Srail - Parma OH Thomas R. Szczepanski - North Royalton OH
Assignee:
R.J.F. International - Brecksville OH
International Classification:
C09L 902 C09L 906
US Classification:
525237
Abstract:
Crystalline elastomeric network compositions are transformable from their original cured shape into an altered shape and subsequently back to their original shape. The transformation process, which is repeatable, is effected by the simultaneous application of heat and deformation forces. The amount of heat required, expressed in terms of temperature, is relatively low. The shape-transformable compositions of the present invention are single phase blends of one or more crystalline polymers and one or more elastomer polymers. The compositions generally have a single broad endotherm due probably to the co-crystallization of the different crystalline segments, a low glass transition temperature, and a low transformation temperature, that is generally less than 100. degree. C.
Magnetized Material Having Enhanced Magnetic Pull Strength And Process And Apparatus For The Multipolor Magnetization Of The Material
Raymond C. Srail - Parma OH Richard A. Glover - Brookpark OH Thomas R. Szczepanski - North Royalton OH Eric M. Weissman - Chagrin Falls OH Frederic W. Kunig - Akron OH
Assignee:
RJF International Corporation - Brecksville OH
International Classification:
H01F 702 H01F 720 H01H 4700
US Classification:
335302
Abstract:
A process and apparatus for permitting the magnetization of flexible hard magnetic materials in the form of sheets or strips, such as magnetic rubber, wherein opposing arrays formed from alternating magnetic disks and flux conducting elements are use in sets of two with opposing polar moments such as to induce a magnetic flux in the gap between the discs. The width of the magnetic disk and flux conducting elements, respectively, are selected to optimize the magnetic pull strength of the material. At the array ends are flux conducting elements that are about 1/2 (i. e. , from about 0. 25 to about 0. 75, and preferably from about 0. 4 to 0. 6) of the width of the internal flux conducting elements. A material to be magnetized is passed between the array sets in contrast with both disks and consequently imprinted with magnetic poles. The magnetized properties of the material is enhanced by passing the material through a second set of arrays which are axially offset with respect to the first set of arrays.
Magnetic or magnetizable composites contain ferrite or rare earth particles in a lightweight flexible binder blend of a semicrystalline polyolefin dispersed within a rubbery matrix. Small but effective amounts of lubricating agents are utilized to improve the processability of the composite which generally lacks any halogen and is environmentally friendly.
Flexible High Energy Magnetic Blend Compositions Based On Rare Earth Magnetic Particles In Highly Saturated Nitrile Rubber
Raymond C. Srail - Parma OH Richard A. Glover - Brookpark OH Tiong H. Kuan - Hudson OH Thomas R. Szczepanski - North Royalton OH
Assignee:
The B. F. Goodrich Company - Brecksville OH
International Classification:
C04B 3550 C08J 320 C08K 308 C08L 902
US Classification:
252 6254
Abstract:
A flexible magnetic blend composition is provided which is comprised of high energy rare earth magnetic particles in a flexible high temperature resistant and oil resistant polymer binder. The binder system preferably comprises a highly saturated nitrile rubber (HSN) or a polymer alloy of the same in which a HSN is the major polymer and also contains additives which are compatible with processing, subsequent electron beam curing, and final product performance. The binder system is high loaded, usually from about 50 to about 70 volume percent, with the high energy rare earth magnetic particles, which can produce bonded magnets with a maximum energy product of at least 2. 5 megagauss-oersteds, a remenance, B. sub. r of at least 3400 gauss, a coercive force, Hc, of at least 2900 oersteds and an intrinsic coercivity, Hci, of at least 5000 oersteds. The process for production of this system involves the binder system and rare earth magnetic particles being mixed and then formed into a final geometry before being cured by high voltage electron beam radiation.
Flexible High Energy Magnetic Blend Compositions Based On Ferrite Particles In Highly Saturated Nitrile Rubber And Methods Of Processing The Same
Raymond C. Srail - Parma OH Richard A. Glover - Brookpark OH Tiong H. Kuan - Hudson OH Thomas R. Szczepanski - North Royalton OH
Assignee:
The B. F. Goodrich Company - Akron OH
International Classification:
C04B 3504
US Classification:
252 6254
Abstract:
A flexible magnetic blend composition is provided which is comprised of high energy ferrite magnetic particles in a flexible high temperature resistant and oil resistant polymer binder. The binder system is preferably a highly saturated nitrile rubber (HSN) or a polymer alloy of the same in which a HSN is the major polymer containing alloying polymers and/or additives which are compatible with processing, subsequent electron beam curing, and final product performance. The binder system is highly loaded usually from 55 to 65 volume percent with the high energy ferrite particles, i. e. , barium and/or strontium ferrite particles, which can produce bonded magnets with a maximum energy product of at least 1. 0 megagauss-oersteds, a remenance, Br, of at least 2000 gauss, a coercive force, H. sub. c, of at least 1800 oersteds, and an intrinsic coercivity, H. sub.