UL认证是北美地区公认的产品安全信誉认证，UL标志是相关产品进入美国以及北美市场的一个特别通行证。据悉，YM系列产品此前已通过国标GB和美标FDA相关标准测试，满足食品及医疗卫生领域的应用要求。

YM系列产品为榆林能化公司与上海榆美新材料有限公司联合研发的高端聚丙烯产品，产品具有优异的透明度与刚韧平衡性能，可大幅缩短制品加工成型周期，有效降低注塑温度，从而助力终端客户减少能源消耗与加工成本，符合能源“双控”与绿色低碳发展理念。其中，超透明YM40UC为国内首创，产品成功替代PS应用于知名企业冰箱抽屉等部件的加工中。

UL certification is a recognized product safety reputation certification in North America, and the UL mark is a special pass for related products to enter the United States and the North American market. It is reported that YM series products have passed the national standard GB and the US standard FDA relevant standard tests to meet the application requirements in the field of food and medical health.

YM series products are high-end polypropylene products jointly developed by Yulin Energy Chemical Company and Shanghai Yumi New Materials Co., LTD. The products have excellent transparency and toughness balance performance, can greatly shorten the product processing and molding cycle, effectively reduce the injection molding temperature, so as to help end customers reduce energy consumption and processing costs, in line with the energy "double control" and green low-carbon development concept. Among them, the ultra-transparent YM40UC is the first in China, and the product has successfully replaced PS in the processing of refrigerator drawers and other parts of well-known enterprises.