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生产医用口罩材料的山东企业家于晓宁，因全球对口罩需求锐增，公司市值一个半月内暴增4倍，相当于多了135亿人民币(约82亿3363万令吉)。

媒体形容，于晓宁生产熔喷料就像印钞票一样。

于晓宁是山东道恩集团董事长。他创立的公司在2003年严重急性呼吸道症候群(SARS)爆发期间开始加强熔喷料的生产，而这是生产医用外科口罩的特殊材料。

在中国政府于1月20日对疫情发出警告后的6周内，在深圳上市的道恩股份的股价飙升417%。

截至3月9日，于晓宁夫妇所持公司股份的价值从人民币约33亿元飙升至168亿元，暴增逾135亿元。

无论如何，道恩股份的股价已从高峰时期的59元人民币滑落至最新约37元。

恒泰证券分析师表示，对熔喷专用料的竞争已经成为全球防疫的关键，这也是熔喷专用料最近价格飙升的原因。