PROBLEM TO BE SOLVED: To solve such problems that: since commercially available granite porphyry (hereinafter, denoted by granite porphyry ore) is conventionally in a form of particulate, sand or power, it is necessary to accommodate the ore in some kind of container such as (1) a mesh bag, (2) a sealed bag or (3) a container in order to prevent dissipation or scattering of the granite porphyry ore, which limits forms of the ore for commercialization if the granite porphyry ore is (4) directly disposed for use in a bath tub or the like, it is necessary to clean the ore as bacteria or the like grow on scales, which means troublesome cleaning works such as disinfection, sterilization and drying under sun rays are necessary a cleaning work can be simplified by kneading the ore in a rubber resin and, though a process of (5) mixing the ore in urethane resin or plastic resin to obtain a molded article can be employed, the mixing ratio of the ore by the process is low, which results in an insufficient effect.SOLUTION: By kneading granite porphyry ore in a rubber resin, a content ratio of the ore in a molded article can be increased up to about 100 parts by weight with respect to 100 parts by weight of the rubber resin. By kneading the ore with the rubber resin, the ore is prevented from dissipating such as dropping, and stable qualities can be maintained even in a long-term use.COPYRIGHT: (C)2013,JPO&INPIT【課題】[0026]従来、市販されている麦飯石は(以下麦飯鉱石と呼ぶ)粒子状、砂状、粉末状、で存するために麦飯鉱石の散逸 飛散を防ぐ必要があり1-網袋に収容するか、2-密封袋に収容するか、3-容器に収容するか、等々、何らかの容器に収容する必要があり、商品化するのに形態状の制約があった。4-また麦飯鉱石を風呂桶等に直接設置して使用すると 湯垢などにより バクテリア等が発生するために 洗浄の必要が生じ殺菌、消毒、天日乾燥、などの洗浄作業が必要となり煩雑であったが ゴム樹脂に練り込む事で 洗浄作業が簡易化される。5-ウレタン樹脂やプラスチック樹脂に混合して成型品とする方法(特許第3723088号公報参照)もあるがこの場合は混合比率が低いために効果も低いと推測できる。【解決手段】[0027]本発明では 麦飯鉱石をゴム樹脂に練り込む事で、成型品への該鉱石の含有率を100重量部に対して100重量部程度 練り込める事を可能にした。またゴム樹脂に練り込む事で 該鉱石の脱落等の消失を防ぎ 長期間の使用にも変わらぬ品質を保つ事を可能にした。
