化工材料检测部门对该材料的性能及环保性都经过严格的检验，来保证广大消费者权益不受到伤害。机械性能好，可以像木材一样锯、刨、钉等机械加工，具有坚硬，强韧，耐久，耐磨的性能；发泡后形成大量均匀规整的泡孔，可使制品得地节约成本。实验表明，与未发泡PVC/木粉复合材料相比，挤出发泡后密度可降低5%，可达.6g/-1.g/cm3.发泡后均匀规整的泡孔结构可钝化裂纹*断裂伸长率可显著提高。它也是一种环保材料，原料廉价丰富，可回收，可减少环境污染，保护森林资源。
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CBG齿轮泵骨架油封与密封环之间的前盖回油通道不畅通，造成此处压力升高，从而击穿骨架油封。通过对此处改进后，泵的窜油现象有了明显的改善。其结构形式如图1所示。齿轮泵与主机安装质量的影响齿轮泵与主机的安装要求同轴度小于.5。通常工作泵安装于变速泵，变速泵又安装于变速箱。如果变速箱或变速泵的端面对花键轴回转中心的跳动差，形成累积误差，致使齿轮泵在高速旋转状态下承受径向力，造成油封窜油。
