Ozone film coated composite processing technology

A plastic film prepress
Commonly used plastic film gravure, flexo and screen printing process, usually after printing but also for composite processing, in order to achieve good use of effects. The surface properties of various plastics, because its molecular structure a polar group, the degree of crystallization and chemical stability of different factors which are very different. These factors combined with the printing ink fastness, the bond strength of composite films great impact. Therefore, before the printing or composite processing, should be considered the surface properties of different plastics, surface treatment proper, in order to obtain excellent processing suitability.

1. Improve the printability of the film
Theoretically, on the substrate to obtain a good printability, the substrate should be higher than the surface tension of the surface tension of the printing ink.
PP, PE film is non-polar polymers, chemical stability, low surface tension, combined with synthetic resin added when opening agents, antistatic agents, anti-aging agents affected, difficult and ink adhesion.
In order to improve the surface tension of the plastic film, to improve its wettability and adhesion properties, thereby improving the fastness of printing inks, commonly used methods are the following surface treatment.
① corona treatment. High-frequency (IF) of high voltage power supply, the discharge gap of the blade holder and release to produce a corona phenomenon, the plastic film surface treatment, this method is called corona treatment, also known as electron impact or EDM process. Its processing role is to:
a. By electric discharge, the ionization of oxygen between the poles, to produce ozone. Ozone is a strong oxidant, oxidation of the plastic film surface can immediately molecules to the non-polar to polar conversion, surface tension increased. Ordinary corona machine, through a spark to produce ozone, taking an external discharge, ozone production is low, our company produces ozone discharge tube, high concentrations of ozone concentrations can be up to 80-120mg / L, greatly improving the utilization of ozone rate, thereby enhancing the adhesion of the film.
b. Electron impact, the slightly concave surface of the film dense pockets, the plastic surface roughening, increasing the surface activity.

2. Ozone film processing works

It is now widely understood atmospheric ozone layer is a natural barrier to block the sun's ultraviolet, which is composed of sunlight a particular wavelength spectrum of light irradiation generated after a thunderstorm to a special kind of people will breathe fresh taste is in fact the air increase in the ozone concentration (usually around 0.04PPM) easy to be detected, the reason why the ozone concentration increase, because the lightning (high power) ionizing oxygen in the air to form ozone, forest, tourist areas particularly fresh air, because the plants CO2 absorption process of manufacturing a [O], oxygen atoms in the formation process, some form O2 (oxygen we breathe) part of the O3 (ozone) is the ubiquitous nature of ozone and ultraviolet sunlight in control of bacterial survival balance, protect human health.

Human studies have found through the ozone, ozone has unstable characteristics and strong oxidizing ability. Ozone is an oxygen molecule (O2) carrying an oxygen atom (O) component, therefore he is an allotrope of oxygen. Ozone and oxygen, the difference between the table below:

 Table one of the main properties of oxygen and ozone

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