公开(公告)号：US20010028921A1

公开(公告)日：2001-10-11

申请号：US09850750

申请日：2001-05-08

Applicant: 3M Innovative Properties Company

Inventor： David G. Shaw ,  Daniel S. Cline ,  Eric P. Dawson ,  Marc Langlois

IPC: C23C016/00 ,  C08F002/46 ,  B05D003/06 ,  B05D005/08

CPC classification number: G02B5/28 ,  B42D25/29 ,  B42D2035/24 ,  G02B5/286 ,  G02B5/287 ,  G06K19/06046 ,  G06K2019/06225 ,  Y10T428/31699

Abstract: Several techniques may be used for forming a colored interference filter coating on a substrate such as polyester film. The interference filter has two metal reflective films, at least one of which is semi-transparent. A layer of transparent acrylate polymer dielectric between the metal layers completes the interference filter, which may be sandwiched between protective layers. The dielectric is formed by evaporating an acrylate monomer having a molecular weight in the range of from 150 to 600. Preferably the acrylate monomer has a molecular weight to acrylate group ratio in the range of from 150 to 400. The acrylate condenses on the substrate and is polymerized in situ for forming a monolithic film with a sufficient thickness to produce an interference color. In several embodiments different areas of the film have different thicknesses for producing different interference colors. The thickness of the dielectric can be controlled by the amount of monomer condensed, by either controlling the temperature of the condensation surface or controlling the amount of monomer evaporated adjacent a predetermined area of the substrate. Thickness may also be controlled by condensing a uniform layer of monomer and polymerizing the monomer to different degrees for varying the shrinkage of the film and hence the thickness of the film and color.

Abstract translation: 可以使用几种技术来在诸如聚酯膜的基底上形成有色干涉滤光器涂层。 干涉滤光片具有两个金属反射膜，其中至少一个是半透明的。 在金属层之间的一层透明丙烯酸酯聚合物电介质完成干涉滤光器，其可夹在保护层之间。 电介质是通过蒸发分子量为150-600的丙烯酸酯单体而形成的。优选地，丙烯酸酯单体的分子量与丙烯酸酯的比例在150-400的范围内。丙烯酸酯在基材上冷凝， 原位聚合以形成具有足够厚度的整体膜以产生干涉色。 在几个实施例中，膜的不同区域具有不同的厚度，用于产生不同的干涉色。 通过控制冷凝表面的温度或控制在衬底的预定区域附近蒸发的单体的量，电介质的厚度可以通过冷凝的单体的量来控制。 厚度也可以通过将均匀的单体层冷凝并将单体聚合到不同程度来控制，以改变膜的收缩率，从而改变膜的厚度和颜色。