6月21日，根据市场和客户的需求，包头化工首次顺利完成聚丙烯新产品L5D98-1转产工作，进一步优化了聚丙烯产品结构，为公司高端化、多元化、低碳化发展奠定了坚实基础。

L5D98-1是双向拉伸聚丙烯薄膜膜料，具有优良的拉伸强度、冲击强度、刚性、韧性和透明度，且产品熔指稳定，灰分含量低，广泛应用于烟膜、包装袋、手提袋和透明胶带等领域。为确保转产聚丙烯L5D98-1产品性能符合下游客户需求，该公司技术人员充分研究同类型典型牌号产品的结构及性能，对转产过程中的氢气丙烯比、切换外给电子体、造粒切换复配剂等参数进行摸索优化，计算出涉及转产所需催化剂、添加剂、复配剂加入量，进一步完善转产方案，并联系仪表人员拆清复配剂称并校称，联系分析检测人员做好循环气取样色谱标定，为顺利完成牌号切换创造良好条件。在转产过程中，该公司技术人员全程跟踪指挥，强化牌号切换过程控制，班组人员精心操作，按照方案逐步调控反应氢气丙烯比，将复配剂切至L5D98-1复配剂，精确调整添加剂配比、氢气流量、乙烯加入速度等重要参数，并根据分析色谱数据和分析化验室提供数据，及时对模板温度、切粒机进刀压力及颗粒水温度等运行指标进行调整优化，有效避免过渡料的产生，确保转产过程平稳进行，最大程度保证产品质量。

此次聚丙烯新产品L5D98-1首次转产工作的顺利完成，进一步优化了公司牌号切换方案，不断拓宽聚烯烃产品种类，有效巩固了稳产、优产、高产和多产发展成果，为公司高质量发展奠定坚实基础。

On June 21, according to the needs of the market and customers, Baotou Chemical successfully completed the conversion of the new polypropylene product L5D98-1 for the first time, further optimizing the polypropylene product structure, and laying a solid foundation for the high-end, diversified and low-carbon development of the company.

L5D98-1 is a bidirectional tensile polypropylene film material, with excellent tensile strength, impact strength, rigidity, toughness and transparency, and the product melting finger stability, low ash content, widely used in cigarette film, packaging bags, handbags and transparent tape and other fields. In order to ensure that the performance of the converted polypropylene L5D98-1 product meets the needs of downstream customers, the company's technical staff fully studies the structure and performance of typical products of the same type, explores and optimizes parameters such as hydrogen propylene ratio, switching external electronic body, granulation switching compounding agent and so on during the conversion process, and calculates the amount of catalysts, additives and compounding agents required for conversion. Further improve the conversion plan, and contact the instrument personnel to remove and calibrate the compound, contact the analysis and detection personnel to do a good job of circulating gas sampling chromatography calibration, to create good conditions for the smooth completion of the brand switch. In the process of production conversion, the company's technical personnel tracked and directed the whole process, strengthened the control of the grade switching process, and the team personnel carefully operated, gradually regulated the reaction hydrogen propylene ratio according to the plan, cut the compounding agent to L5D98-1 compounding agent, and accurately adjusted the important parameters such as the ratio of additives, hydrogen flow rate, and ethylene addition speed. According to the chromatographic data and the data provided by the analytical laboratory, timely adjustment and optimization of the template temperature, pelleting machine feed pressure and particle water temperature and other operating indicators, effectively avoid the generation of transition materials, ensure the smooth transition process, and maximize the quality of products.

The successful completion of the first production conversion of the new polypropylene product L5D98-1 further optimized the company's brand switching program, continuously expanded the types of polyolefin products, effectively consolidated the development results of stable production, excellent production, high yield and prolific production, and laid a solid foundation for the company's high-quality development.