一.防伪原理近年来,重离子微孔(以下简称微孔)防伪技术走出了带有神秘色彩的原子能实验室,进入了大众的生活领域、给防伪行业带来了希望和生机。它是和平利用原子能技术的一项重要成果。微孔为什么能防伪?普通百姓能鉴别吗?要清楚这些问题,还得从它的基本原理谈起。物质是由原子核和绕核运转的电子组成,原子中的电子被剥离后变成离子。具有一定能量的重离子能够穿透塑料膜,在塑料膜上造成损伤,留下痕迹,若将这些痕迹进行化学腐蚀,则可扩大形成直径为微米量级的一致性很好的微孔。这些微孔的直径和密度都可进行控制。将具有这些微孔的薄膜用于过滤,是一种很好的过滤材料,若在薄膜上由大量的微孔组成一个 I. Anti-counterfeiting principle In recent years, heavy ion microporous (hereinafter referred to as microporous) anti-counterfeiting technology out of the mysterious atomic energy laboratory into the public life areas, to the security industry has brought hope and vitality. It is an important achievement of the peaceful use of atomic energy technology. Why micro holes can be security? Ordinary people can identify it? To understand these issues, have to talk about its basic principles. Matter is composed of the nucleus and the nucleus run around the electron, the atoms in the electron is stripped into ions. Heavy ions with a certain energy can penetrate the plastic film, causing damage on the plastic film and leaving traces. If these traces are chemically etched, micropores with good consistency on the order of microns in diameter can be enlarged. The diameter and density of these pores can be controlled. Filtering membranes with these micropores is a good filtration material. If a large number of micropores are formed in the membrane