Microwave absorber and process for manufacturing same
AssigneesOtsuka Science Co., Ltd., Nitto Boseki Co., Ltd.
InventorsShinichi Yamada, Kyoji Miyata, Kazuhiko Mori, Osamu Yamamoto, Yukitoshi Sato
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Abstract
A microwave absorber in a pointed shape, including a phenol resin foam containing a dielectric loss material, is prepared by setting an incombustible sheet container of a same shape in a mold in a pointed shape, pouring the phenol resin to which the dielectric loss material is blended, and foaming and curing. As a result, a semi-incombustible or incombustible microwave absorber of high strength possessing a high microwave absorption capacity in a wideband is obtained.
Claims13
A microwave absorber comprising a phenol resin foam into which a dielectric loss material has been blended prior to foaming, a density of the phenol resin foam being in a range from 30 kg/m.sup.3 to 300 kg/m.sup.3.
A process for manufacturing a microwave absorber having a pointed shape, said process comprising:
- setting, in a mold having a pointed shape, a container which has a shape that is the same as the shape of the mold and which is formed of an incombustible sheet, the incombustible sheet including an inorganic fiber;
- pouring into the mold phenol resin into which a dielectric loss material is blended;
- foaming the phenol resin;
- and
- curing the phenol resin.
A microwave absorber comprising a phenol resin foam into which a dielectric loss material has been blended prior to foaming.
Dependencies are inferred from the claim text.