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US 4,555,422 AGranted
Heat shrinkable magnetic shielding article
AssigneeFujikura Ltd.
InventorsKoichi Nakamura, Masashi Ishibashi, Hideki Kameda, Minoru Makiyo
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Abstract
An article comprising a magnetic shielding thermoplastic polymeric material containing a powdery ferrite and a heat shrinkable thermoplastic polymeric material layer. Due to its specific structure, this article is excellent in applicability over any electrical component, and may provide over the component a cover having excellent magnetic shielding and mechanical strength properties. It may also bring about a substantial increase in inductance of the component.
Claims14
A heat shrinkable magnetic shielding article which comprises:
- a heat shrinkable layer comprising a thermoplastic polymeric material;
- and, arranged under the layer, directly or via an adhesive layer, a magnetic shielding layer comprising a thermoplastic polymeric material and at least one powdery ferrite selected from the group consisting of MnO.Fe.sub.2 O.sub.3, FeO.Fe.sub.2 O.sub.3, CoO.Fe.sub.2 O.sub.3, NiO.Fe.sub.2 O.sub.3, CuO.Fe.sub.2 O.sub.3 and ZnO.Fe.sub.2 O.sub.3,
- said magnetic shielding layer being heat shrinkable or being adapted to flow due to the force exerted by shrinkage of the heat shrinkable layer,
- said ferrite being contained in the magnetic shielding layer in an amount of from 10 to 90% based on the total weight of the layer.
1 more element
Dependencies are inferred from the claim text.