ICS 33.180.10 CCS M33 YD 中 华 人 民 共 和 国 通 信行 业 标 准 YD/T 1118.4—202X 光纤用二次被覆材料 第4部分：热塑性聚酯弹性体 Secondary coating materials used for optical fibre-Part 4:Thermoplastic polyester elastomer （报批稿） XXXX - XX - XX发布 XXXX - XX - XX实施 中华人民共和国工业和信息化部   发布 YD/T 1118.4—202X I目次 前 言 ........................................................................... III 引 言 .............................................................................. IV 1 范围 ................................................................................. 1 2 规范性引用文件 ....................................................................... 1 3 术语和定义 ........................................................................... 1 4 产品分类 ............................................................................. 1 4.1 产品型号 ......................................................................... 1 4.2 产品规格 ......................................................................... 2 4.3 标记 ............................................................................. 2 5 要求 ................................................................................. 2 5.1 外观 ............................................................................. 2 5.2 机械物理性能 ..................................................................... 2 5.3 环保性能 ......................................................................... 3 6 试验方法 ............................................................................. 4 6.1 通则 ............................................................................. 4 6.2 外观 ............................................................................. 4 6.3 试样制备 ......................................................................... 4 6.4 邵氏硬度 HD ....................................................................... 4 6.5 密度 ............................................................................. 4 6.6 含水量 ........................................................................... 4 6.7 饱和吸水率 ....................................................................... 4 6.8 熔融指数 ......................................................................... 4 6.9 拉伸强度、断裂伸长率、拉伸弹性模量 ............................................... 4 6.10 热老化性能 ...................................................................... 4 6.11 弯曲强度、弯曲弹性模量 .......................................................... 4 6.12 熔点 ............................................................................ 4 6.13 低温冲击脆化性能 ................................................................ 5 6.14 材料与填充油膏的相容性 .......................................................... 5 6.15 环保性能 ........................................................................ 5 6.16 黄色指数和黄色稳定性 ............................................................ 5 6.17 悬臂梁冲击强度 .................................................................. 5 7 检验规则 ............................................................................. 5 7.1 总则 ............................................................................. 5 7.2 术语限定 ......................................................................... 5 7.3 试样 ............................................................................. 6 7.4 检验项目 ......................................................................... 6 7.5 出厂检验 ......................................................................... 6 YD/T 1118.4—202X II7.6 型式检验 ......................................................................... 6 8 包装、标志、运输、贮存 ............................................................... 7 8.1 包装 ............................................................................. 7 8.2 标志 ............................................................................. 7 8.3 运输 ............................................................................. 7 8.4 贮存 ..............................