CYLINDRICAL FILTER FOR CESIUM ION ADSORPTION

• Main Authors: YOSHIDA KOJI, MITANI KENTARO, HASHIMOTO TOMIYA, HIGUCHI SHINYA
• Format: Patent
• Language: English; Japanese
• Published: 19.11.2015
• Subjects: BRAIDING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; COTTON-WOOL; DECONTAMINATION ARRANGEMENTS THEREFOR; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; KNITTING; LACE-MAKING; LAUNDERING; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; NON-WOVEN FABRICS; NUCLEAR ENGINEERING; NUCLEAR PHYSICS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULARRADIATION OR PARTICLE BOMBARDMENT; SEPARATION; TEXTILES; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS; TRIMMINGS; WADDING

PROBLEM TO BE SOLVED: To provide a cylindrical cartridge filter which makes a cesium ion adsorbent fixed firmly and causes very little falling-off, has an excellent cesium ion adsorption capacity and combines the excellent cesium ion adsorption capacity and an ability of removing fine particles adsorbing cesium.SOLUTION: A cylindrical filter is laminated with nonwoven fabrics containing two or more fibers with a difference in melting point of 30°C or greater and/or a fiber consisting of polymers having a difference in melting point of 30°C or greater and located adjacently or being in the form of a sheath-core structure. At least one of the nonwoven fabrics is a nonwoven fabric fixed with a cationic polymer compound containing a tertiary or quaternary ammonium group, and other nonwoven fabrics are nonwoven fabrics fixed with a cationic polymer compound containing a tertiary or quaternary ammonium group and a cesium adsorbent. 【課題】本発明の課題は、強固にセシウムイオン吸着剤を固着させ脱落が非常に少ない、優れたセシウムイオン吸着能を有する筒状カートリッジフィルターであり、優れたセシウムイオン吸着能とセシウムを吸着した微粒子の除去能力の両方を兼ね備えた筒状カートリッジフィルターを提供するものである。【解決手段】３０℃以上の融点差がある２種以上の繊維及び／または３０℃以上の融点差があるポリマーが隣接または芯鞘構造となっている繊維を含む不織布を積層した筒状フィルターであって、前記不織布の少なくとも１種が第３級または第４級アンモニウム基を含むカチオン性高分子化合物が固着された不織布であり、他の不織布が第３級または第４級アンモニウム基を含むカチオン性高分子化合物及びセシウムイオン吸着剤が固着された不織布であることを特徴とするセシウムイオン吸着用筒状フィルター。【選択図】図５