Non-absorbent material printing nano-processing technology

In the field of special printing, plastics can not be directly printed by the printing material, subject to a surface treatment method, the surface of the material to be printed is subjected to polarity and surface roughening, so that the ink can be smoothly attached to the surface, although the surface modification technology It has been in existence for many years, but its breadth and scale have grown significantly in the last 10 years. Most of this growth has been attributed to the development and dissemination of rapid and reliable surface-specific processing technologies. These methods include chemistry, photochemistry and high energy physics to improve the polymer surface. Chemical methods include reactions such as halogenation, addition, etching, and oxidation. Photochemical methods include surface reactions such as oxidative and non-oxidative decomposition, halogenation and light grafting. Physical methods include corona discharge, plasma, electron and ion beam processing. This article will introduce corona treatment, UV treatment and plasma treatment.

â–¼Corona treatment

The principle of corona treatment is the use of an electrostatic discharge method to improve the coating adhesion of a plastic film, and to solve the problem of adhesiveness generated in the printing of polypropylene or polyethylene film. In addition, the surface of the film produced by the water and high solids radiation curing ink (high solids radiation cumable ink) will lead to an increase in surface energy, for example: polyvinyl chloride and polyester are the film. The pretreatment for the general film application includes: burning treatment, corona treatment, or coating operation to enhance adhesion.

The corona treatment system includes a generator, a high voltage transformer and a processing machine, and the processing machine is basically a capacitor, and the processed material is disposed between the electrodes. The voltage gradually increases until the corona treatment is achieved, so the corona treatment can increase the surface oxidation, promote the breakage of the chemical bond and cause more hydroxyl groups, carbonyl bonds and hydrogen peroxide. The key, the film surface will change roughening, so that the surface contamination is reduced.

Plastic films are usually placed between the rollers and given a bipolar treatment and the electrode is separated from the electrode surface by approximately a few centimeters. The corona treatment decreases with time. The influencing factors include: elevated temperature and humidity. In addition, there are additives that reduce the surface energy and improve the sliding property after painting. Therefore, corona Treatment needs to avoid the formation of rabbits and the increase of surface energy to affect loosening and winding.

The corona treatment used various variations of the film and related reports. The applicable range is polypropylene and low surface energy plastics. When the air interval is raised to 5omm, the voltage is 5600OKHz. In this way, the corona discharge condition can be controlled.

â–¼UV treatment

UV treatment is usually applied to the combustion treatment of polypropylene buffers produced in the automotive industry. The treatment method is divided into two stages. First, the buffer is coated with a primer to give a layer of 3 to 5 μm. Film. The primer is mainly benzophenone or chlorinated polymer. The purpose of the primer is to add to the surface to improve the properties of the polypropylene. Therefore, the uniform coating of the primer on the plastic can achieve ultraviolet radiation prevention. Therefore, Applicable to the buffer coating operation.

â–¼plasma treatment

Recently, the plasma treatment method is highly valued, and the method can improve the adhesion of the surface of the plastic film and improve its physical properties, such as wear resistance and gas permeability. The ion plasma method utilizes a voltage to generate plasma in a cold or non-equilibrium low pressure vacuum chamber, and the cold plasma is commonly used in the electronics industry. For example: The circuit melts and shields the photon resist, as well as the clean contact surface. In this way, insulating coatings can be applied. Such equipment is rather expensive compared to pre-treatment equipment, so the scope of application of this method is limited, and its advantages are that the project is clean and only a few volatile organic compounds (VOCs) are produced. However, this method can promote high surface energy and reactivity on the plastic film surface. In addition, it also has a regeneration function. This method can also provide good bonding and synthesis in electronic applications. Potting compound.

The ion plasma treatment method is widely used in the plastic surface treatment, and the ion plasma is produced by using the components and electrons of each other, or the electrons are placed on the circumference and the components are in the central part. The AC ions usually use the microwave or the electric frequency. The air flow into the vacuum chamber must be maintained at 50~100cm3 per minute. The depth of the surface treated by this method is approximately 0.O2μm. Before this method is performed, the surface dirt must be removed. Usually, the plastic surface receives electrons, The impact of positive ions and photons, as well as the type, pressure, and agitation of the plasma, are influenced by the following factors:

The organic contaminants that are present on the surface of the joint, when using the plasma-assisted method, can be destroyed and produce a vapor phenomenon.

Since the plasma bond breaks the chemical bond, an ablation phenomenon occurs and a small molecule is generated on the plastic surface. This phenomenon is due to the fact that the crystalline state having a semi-crystalline state of about amorphous plastic is relatively easy to remove and thus changes the surface state.

The use of plasma treatment methods can break the plastic surface link and ablation of surface molecules,

New chemical groups are created. For example, polar functional groups (such as hydrogen groups) containing oxygen molecules can increase surface energy.

Multi-function Kiosks

Multi-function Kiosk is integrated Touch panel, Mainboard, Memory, hard disk and other electronic components, it is make no difference with All in one PC.

According the size of kiosk and software could release Public information inquiry, advertisement display, media interaction, meeting display,  experience store products diplay ect, also could match scanner reading, printer to achieve special functions.

Multi-function Kiosk

Payment Kiosk,Multi Function Kiosk,Advertising Kiosk,Multi Media Kiosk

Guangzhou Sosu Electronic Technology Co., Ltd. , https://www.sosuchina.com

Posted on