复合材料BMC(DMC)材料 是Bulk(Dough) molding compounds的缩写，即团状模塑料。国内常称作不饱和聚酯团状模塑料。其主要原料由GF（短切玻璃纤维）、UP（不饱和树脂）、MD（填料）以及各种添加剂经充分混合而成的料团状预浸料。DMC材料于二十世纪60年代在前西德和英国，首先得以应用，而后在70年代和80年代分别在美国和日本得到了较大的发展。因BMC团状模塑料具有优良的电气性能，机械性能，耐热性，耐化学腐蚀性，又适应各种成型工艺，即可满足各种产品对性能的要求，因此越来越受到广大用户的选择。
Composite BMC (DMC) material is the abbreviation of Bulk (Dough) moulding compounds, that is, globular moulding plastics. Usually called unsaturated polyester moulding plastics in China. The main raw materials are aggregated preprepreg made of GF (short glass fiber), UP (unsaturated resin), MD (filler) and various additives. DMC materials were first used in the former West Germany and Britain in the 1960s, and then developed greatly in the United States and Japan in the 1970s and 1980s respectively. Because BMC moulding plastics have excellent electrical properties, mechanical properties, heat resistance, chemical corrosion resistance, and adapt to various moulding processes, they can meet the performance requirements of various products, so more and more users choose them.
复合材料（GF（短切玻璃纤维）、UP（不饱和树脂）、MD（填料）以及各种添加剂经充分混合而成的料团状预浸料）
Composites (GF (short glass fiber), UP (unsaturated resin), MD (filler) and various additives are fully mixed to form aggregate preprepreg)
复合材料电缆沟盖板是近几年刚刚兴起的一种新材料盖板，它由于具有很高的抗压、抗弯、抗冲击的强度，有韧性、重量轻、防静电、方便开启等优点，大大的代替了传统的水泥盖板（重量重，易折断厚度最少不能低于5厘米以上，粗老笨重不便开启等缺点）钢板（要先其制作，成本高重量重不适宜太宽的电缆沟使用，人走在上面会响，不绝缘维修时不便于开启）

Composite cable trench cover is a new material which has just emerged in recent years. Because of its high compressive, bending and impact strength, toughness, light weight, anti-static, easy to open and www.zhutongjian.cnwww.zhutiejian.net.cnwww.diandongmenz.cnwww.fenshaoluu.cn

www.fusheguan.com.cnwww.zhujianchang.cnso on, it greatly replaces the traditional cement cover (heavy weight, easy to break thickness can not be less than 5 centimeters, heavy, heavy and inconvenient to open).（ It should be manufactured first. It is not suitable for wide cable trench because of its high cost, heavy weight. It will sound when people walk on it, and it is not easy to open when it is not insulated and maintained.