Method of preparing double-layer antimicrobial coating

摘要

A method of a preparing double-layer antimicrobial coating comprises: placing a plastic substrate into a PVD vacuum equipment for a vacuum process; rinsing and activating the substrate when the vacuum level reaches 10−2; coating a metal film onto the activated substrate by the vacuum process; spraying an antimicrobial intermediate coating onto the metal film; and then coating an antimicrobial metal film by PVD to obtain a double-layer antimicrobial layer. The coating has two antimicrobial layers, and includes bores because the density of the coated film layer produced by PVD is low, so that the antimicrobial agent of the antimicrobial intermediate coating can pass through the bores and move to the surface of the coating and the surface of the antimicrobial coating, so as to kill the bacteria or suppress their grown. The method is very suitable for the sanitary, electronics, electrical appliances and the automobile industry.

主权项

1. A method of preparing a double-layer antimicrobial coating, comprising the steps of:
(1) placing a plastic substrate in a physical vapor deposition (PVD) vacuum equipment to carry out a vacuum process, and then rinsing and activating the substrate when a vacuum level reaches 10−2 Pa to obtain an activated substrate; (2) coating a metal film on a surface of the activated substrate by vacuum coating; (3) spraying the substrate coated with the metal film with an antimicrobial intermediate coating, wherein the antimicrobial intermediate coating is added with an organic antimicrobial agent selected from the group consisting of 3-(trimethoxysilyl)propyldimethyloctadecylammonium, 10,10′oxybis-phenoxarsine, and phosphate complex; and (4) coating the substrate having the sprayed antimicrobial intermediate coating with an antimicrobial metal film by PVD to obtain a double-layer antimicrobial layer; wherein the antimicrobial metal film formed by PVD has a low density and includes a large number of bores, such that the antimicrobial agent of the antimicrobial intermediate coating can pass through the bores and move to a surface of the antimicrobial metal film, so as to kill the bacteria or suppress their growth.