一、反光材料的发展简史1950年,美国华裔科学家董棋芳博士研发出定向玻璃微珠,随后又研制出反光布等系列反光材料。1968年,美国ROWLAND兄弟发明并注册微棱镜逆反射技术。反光膜产品是由美国3M公司率先开发成功的,到目前仅有美国、日本、中国、韩国等少数几个国家能够生产,反光 First, a brief history of the development of reflective materials In 1950, the Chinese American Dr. Dong Qifang directional glass beads developed, followed by the development of a series of reflective fabrics and other reflective materials. In 1968, the United States ROWLAND brothers invented and registered micro-prism retroreflective technology. Reflective film products by the United States 3M pioneered the successful development, up to now only the United States, Japan, China, South Korea and a few countries to produce, reflective