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2 results about "Sendust" patented technology

Sendust is a magnetic metal powder that was invented by Hakaru Masumoto at Tohoku Imperial University in Sendai, Japan, about 1936 as an alternative to permalloy in inductor applications for telephone networks. Sendust composition is typically 85% iron, 9% silicon and 6% aluminum. The powder is sintered into cores to manufacture inductors. Sendust cores have high magnetic permeability (up to 140 000), low loss, low coercivity (5 A/m) good temperature stability and saturation flux density up to 1 T.

Clasp for chain-type jewelry such as necklaces

ActiveJP3256150UJewelleryBuckle FastenerSendust
The fasteners for chain-type accessories can be easily removed when needed, and the magnetic force is not transmitted to the surrounding area on the magnetic surface where it is not originally needed. This prevents magnetic clasps from attracting each other when multiple chain-type accessories are displayed side by side on display shelves, etc., and also prevents magnetic clasps from attracting to bag fittings when a hand is placed in a bag. [Solution] A fastener for a chain-like accessory is provided with a pair of magnets 2 at the fasteners at both ends of the chain 3 of the chain-like accessory, and the surfaces other than the joining surface 2a of the magnets are surrounded by a magnetic shielding material 4. The magnetic shielding material is made of iron, permalloy, sendust, or silicon copper, and a gap 5 is interposed between the magnet and the magnetic shielding material.
Owner:ニシカワ

Electromagnetic wave shielding laminate film, adhesive electromagnetic wave shielding laminate, method for manufacturing articles, method for manufacturing inverters, and method for manufacturing batteries

According to this disclosure, a means may be provided for an electromagnetic wave shielding laminate film that is less prone to breakage when bonded to an object having a bent portion, and that achieves a high electromagnetic wave shielding effect when the object has a bent portion. [Solution] This disclosure relates to an electromagnetic wave shielding laminate film comprising a resin layer and a conductive layer, wherein the resin layer contains at least one compound selected from the group consisting of elastomers and cellulosic polymers and a magnetic material, the conductive layer contains a conductor, and the magnetic material comprises at least one selected from the group consisting of permalloy, ferrite and sendust, and the elongation at break at 170°C is 110% or more and 200% or less.
Owner:KONICA MINOLTA INC