OPTICAL FIBER CARRYING RESIN TUBE

• Main Authors: AZUMA SOSUKE, ISHIHARA GAKU, INOUE MASAO, YAMAGUCHI TAKURO, OTA YUSUKE
• Format: Patent
• Language: English; Japanese
• Published: 17.10.2022
• Subjects: ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVEREDIN A SINGLE OTHER SUBCLASS; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; TARIFF METERING APPARATUS; TESTING

To provide an optical fiber carrying resin tube which is usable as a sensor for measuring distortion of a structure and temperature change, can dissolve molding shrinkage and can reduce signal loss.SOLUTION: An optical fiber carrying resin tube 10 has a cylindrical shape and 4 or more optical fibers 12 in a cylinder wall 11A, wherein the optical fiber 12 extends in a tube axis O1 direction, the cylinder wall 11A is formed from a polyolefin resin composition containing a resin (A), density of the resin (A), which is measured according to ISO 1183-1:2019, is 0.920 g/cm3 or more and 0.940 g/cm3 or less, a melt flow rate (MFR) of the resin (A), which is measured according to a method A in ISO 1133 at 190°C and a load of 2.16 kg, is 0.1 g/10 min. or more and 1.3 g/10 min. or less.SELECTED DRAWING: Figure 1 【課題】構造物の歪みや温度変化を計測できるセンサーとして用いることができ、成形収縮を解消でき、信号損失を低減できる光ファイバ担持樹脂管を提供する。【解決手段】円筒状であり、筒壁１１Ａ内に４本以上の光ファイバ１２を有し、光ファイバ１２は、管軸Ｏ１方向に延び、筒壁１１Ａは、樹脂（Ａ）を含むポリオレフィン樹脂組成物で形成され、樹脂（Ａ）の密度は、ＩＳＯ １１８３－１：２０１９に準じて測定された値が０．９２０ｇ／ｃｍ３以上０．９４０ｇ／ｃｍ３以下であり、かつ樹脂（Ａ）のメルトフローレート（ＭＦＲ）は、ＩＳＯ １１３３のＡ法に準じ、１９０℃、荷重２．１６ｋｇで測定された値が０．１ｇ／１０ｍｉｎ．以上１．３ｇ／１０ｍｉｎ．以下である、光ファイバ担持樹脂管１０。【選択図】図１