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    • 1. 发明授权
    • Foundry sand binder
    • 铸造砂粘合剂
    • US4607067A
    • 1986-08-19
    • US725335
    • 1985-04-19
    • Keiji OhashiKohichi Handa
    • Keiji OhashiKohichi Handa
    • B22C1/22B22C1/02B22C1/16
    • B22C1/167B22C1/02
    • A binder is used for binding foundry sand to form a mold and a core for casting, and consists of a condensation-reactive first compound (resin) having at least one methylol group in a molecule, amounting to 100 parts by weight. An additive component is added to the resin to improve the strength and the sand removability of the mold and the core while improving the production yield of the mold and the core. The additive component includes at least one of calcium hydroxide and barium hydroxide in particle form. The particle surface of the at least one of calcium hydroxide and barium hydroxide is coated with a second compound having a melting point not lower than 50.degree. C. and a boiling point ranging from 250.degree. to 400.degree. C., the second compound ranging from 0.5 to 35 parts by weight.
    • 粘合剂用于结合铸造砂以形成铸模和铸造用芯,并由在分子中具有至少一个羟甲基的缩合反应性第一化合物(树脂)组成,重量百分比为100重量份。 向树脂中添加添加剂成分,以提高模具和芯的生产率,提高模具和芯的强度和除砂性能。 添加剂组分包括颗粒形式的氢氧化钙和氢氧化钡中的至少一种。 氢氧化钙和氢氧化钡中的至少一种的颗粒表面涂覆有熔点不低于50℃,沸点为250-400℃的第二种化合物,第二种化合物的范围从 0.5〜35重量份。
    • 3. 发明授权
    • Optical fiber drop cable
    • 光纤线缆
    • US06862390B2
    • 2005-03-01
    • US10612940
    • 2003-07-07
    • Shimei TanakaMasahiro KusakariKazunaga KobayashiKeiji Ohashi
    • Shimei TanakaMasahiro KusakariKazunaga KobayashiKeiji Ohashi
    • G02B6/44H01B11/00
    • G02B6/4433G02B6/4403
    • An optical fiber drop cable is provided with a neck portion in which an optical element section and a cable support section may be separated readily. The optical fiber drop cable 1 comprises the optical element section 9 including an optical fiber core wire 3, at least one pair of first tensile strength bodies 5 disposed in parallel to said optical fiber core wire in between, said optical fiber core wire and said first tensile strength bodies being covered with a cable sheath 7, and the cable support section 15 including a second tensile strength body 11 covered with a sheath 13, and the optical element section 9 and the cable support section 15 being fixed in parallel to each other via a neck portion 17. The neck portion 17 includes a thick part 25 formed on the cable support section 15 side and a thin part 23, which is thinner than the thick part 25, formed on the optical element section 9 side next to the thick part 25.
    • 光纤分支电缆设置有颈部,光学元件部分和电缆支撑部分可以容易地分离。 光纤分支电缆1包括光学元件部分9,其包括光纤芯线3,至少一对平行于所述光纤芯线之间的第一拉伸强度体5,所述光纤芯线和所述第一 拉伸强度体被电缆护套7覆盖,电缆支撑部分15包括被护套13覆盖的第二抗拉强度体11,并且光学元件部分9和电缆支撑部分15彼此平行地固定通过 颈部17包括形成在电缆支撑部分15侧的厚部分25和比厚部分25薄的薄壁部分23,薄部分23形成在紧邻厚部分的光学元件部分9侧上 25。
    • 7. 发明授权
    • Optical fiber and optical fiber cable having a first jacket layer and a second jacket layer and a coefficient of thermal expansion selecting method
    • 具有第一护套层和第二护套层的光纤和光纤电缆以及热膨胀系数选择方法
    • US06804442B1
    • 2004-10-12
    • US10449192
    • 2003-06-02
    • Hirohito WatanabeKeiji Ohashi
    • Hirohito WatanabeKeiji Ohashi
    • G02B602
    • G02B6/4403G02B6/02395
    • An improved optical fiber is described. The optical fiber comprises: a fiber glass structure; a first jacket layer made of a soft curable resin and directly covering the external surface of said fiber glass structure; and a second jacket layer made of a rigid curable resin and covering the external surface of said fiber glass structure through said first jacket layer. The mechanical factors of said fiber glass structure, the mechanical factors of said first jacket layer and the mechanical factors of said second jacket layer are selected in order that the Young's modulus of said first jacket layer is larger than the average tensile stress (&sgr;r+&sgr;&thgr;+&sgr;z)/3 as applied to said first jacket layer 5 while the resin temperature of UV curable resins largely falls from the temperature when the rigid UV curable resin starts hardening to the temperature when the hardening is finished.
    • 描述了改进的光纤。 光纤包括:玻璃纤维结构; 由软固化树脂制成的第一护套层,并直接覆盖所述玻璃纤维结构体的外表面; 以及由刚性可固化树脂制成的第二护套层,并通过所述第一护套层覆盖所述玻璃纤维结构的外表面。 选择所述玻璃纤维结构的机械因素,所述第一护套层的机械因素和所述第二护套层的机械因素,使得所述第一护套层的杨氏模量大于平均拉伸应力(sigmar + sigmatheta + sigmaz)/ 3,而UV硬化树脂的树脂温度从刚性UV固化树脂开始硬化时的温度到硬化结束时的温度大大降低。
    • 9. 发明授权
    • Optical fiber and optical fiber cable using the same
    • 光纤和光缆使用相同
    • US07072554B2
    • 2006-07-04
    • US10614033
    • 2003-07-08
    • Hirohito WatanabeKeiko MitsuhashiTsuyoshi ShimomichiKeiji Ohashi
    • Hirohito WatanabeKeiko MitsuhashiTsuyoshi ShimomichiKeiji Ohashi
    • G02B6/22
    • G02B6/4482
    • A distinctive optical fiber comprises an optical fiber core, distinctive layers, and a colored layer. A plurality of the distinctive layers including fine drops of ink having a specific particle size is disposed intermittently on the optical fiber core in the longitudinal direction of the optical fiber core. The colored layer is disposed on the distinctive layers and on the optical fiber core on which the distinctive layers are not disposed. The following five requirements are required for obtaining the distinctive optical fiber excellent in distinctiveness and with low transmission loss. The thickness of the colored layer is chosen so as to be larger than or equal to 2 μm and smaller than or equal to 10 μm. The thickness of the distinctive layers is chosen so as to be larger than or equal to 0.5 μm and smaller than or equal to 2.5 μm. The length of the distinctive layers is chosen so as to be larger than or equal to 1 mm and smaller than or equal to 15 mm. The interval of the distinctive layers is chosen so as to be in the range between 1 mm and 200 mm. The occupied ratio of the distinctive layers is chosen so as to be less than or equal to 20%. The major diameter of the fine drops of ink is chosen so as to be larger than or equal to 100 μm and smaller than or equal to 400 μm.
    • 独特的光纤包括光纤芯,不同的层和着色层。 在光纤芯的长度方向上间隔地配置有包含具有特定粒径的细墨滴的多个特征层。 着色层设置在不同层上和未设置不同层的光纤芯上。 获得独特优异且传输损耗低的特殊光纤需要以下五个要求。 着色层的厚度选择为大于或等于2μm且小于等于10μm。 不同层的厚度选择为大于或等于0.5μm且小于或等于2.5μm。 不同层的长度选择为大于或等于1mm且小于或等于15mm。 选择不同层的间隔在1mm至200mm之间的范围内。 选择不同层的占有率小于或等于20%。 选择墨水的细滴的大直径为大于或等于100μm且小于或等于400μm。