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Atmospheric plasma surface treatment to change the surface energy of waterborne coatings for automotive industry

  • Categories:Company Dynamics
  • Author:plasma cleaning machine-surface treatment equipment-CRF plasma machine-Sing Fung Intelligent Manufacturing
  • Origin:
  • Time of issue:2020-11-26
  • Views:

(Summary description)How does atmospheric plasma surface treatment ensure the adhesion of waterborne coatings in automobile industry?   When cleaning contaminated surfaces and activating non-polar plastics, it is not possible to obtain long-term stability and flawless adhesion of paint to the surface without a subtle degree of cleaning. There are a variety of cleaning and activation methods and the use of chemical solvents is widely used, but more than 50 per cent of volatile organic compound (VOC) emissions are due to the use of solvents and spraying operations account for the majority of these emissions.   Surface energy is the key factor to ensure wettability and adhesion. Whether the coating can have the adhesion force needed to combine with the substrate mainly depends on the surface energy of the coating. Good wettability means that the surface of the material is ultrafine and clean, and the surface of solid material can be higher than the surface tension of liquid. Chemical solvent-based pretreatment processes are harmful to the environment and are often health-damaging, energy-consuming and costly to dispose of. So it's no surprise that in an era of increasing environmental awareness, car manufacturers are looking for alternatives, and water-based paint systems are moving toward environmentally friendly surface treatment technologies. Atmospheric plasma surface treatment technology is an environmentally friendly, economical and efficient pretreatment process.   Plasma surface treatment technology is a dry pretreatment process without chemical solvent, which combines three effects of micro-cleaning, electrostatic dissipation and surface synchronous activation. Plasma is produced by a high-pressure discharge from a nozzle and is delivered to the surface in the form of an air stream. The surface is activated by chemical and physical interaction between plasma and matrix. When plasmas collide with the plastic surface, the groups containing oxygen and nitrogen combine with the non-polar polymer matrix, and the plasma activation increases the surface energy and makes it become polar. Plasma contains a lot of energy -- free radicals, ions, atoms and molecular fragments -- which release that energy onto the surface of the pretreated material, triggering a chemical reaction to produce an effect. The resulting functional hydroxyl, carbonyl, and carboxyl groups (as well as nitrous oxide) have a strong chemical bond with the coating and contribute to a significant increase in adhesion. During pretreatment, the surface temperature of the plastic generally does not exceed 30℃.   This plasma effect leads to uniform surface wettability, which not only produces good adhesion in a few seconds, but also ensures a high quality finish with waterborne coatings. This environmentally safe process requires only compressed air as the reaction gas and electricity.   The on-line spray gun system of atmospheric plasma surface processor controlled by computer can be monitored by screen and is fully compatible with the machine. At the same time, the process itself is powerful. Traditional pretreatment methods can be completely eliminated by plasma treatment in most cases. Unlike the chemical solvent pretreatment method, this method does not require drying and temporary storage, so it can be used to spray parts immediately after atmospheric plasma cleaning and activation, which not only eliminates some process steps, greatly reduces energy consumption and operating costs, and improves output and product quality.

Atmospheric plasma surface treatment to change the surface energy of waterborne coatings for automotive industry

(Summary description)How does atmospheric plasma surface treatment ensure the adhesion of waterborne coatings in automobile industry?

 

When cleaning contaminated surfaces and activating non-polar plastics, it is not possible to obtain long-term stability and flawless adhesion of paint to the surface without a subtle degree of cleaning. There are a variety of cleaning and activation methods and the use of chemical solvents is widely used, but more than 50 per cent of volatile organic compound (VOC) emissions are due to the use of solvents and spraying operations account for the majority of these emissions.

 

Surface energy is the key factor to ensure wettability and adhesion. Whether the coating can have the adhesion force needed to combine with the substrate mainly depends on the surface energy of the coating. Good wettability means that the surface of the material is ultrafine and clean, and the surface of solid material can be higher than the surface tension of liquid. Chemical solvent-based pretreatment processes are harmful to the environment and are often health-damaging, energy-consuming and costly to dispose of. So it's no surprise that in an era of increasing environmental awareness, car manufacturers are looking for alternatives, and water-based paint systems are moving toward environmentally friendly surface treatment technologies. Atmospheric plasma surface treatment technology is an environmentally friendly, economical and efficient pretreatment process.

 

Plasma surface treatment technology is a dry pretreatment process without chemical solvent, which combines three effects of micro-cleaning, electrostatic dissipation and surface synchronous activation. Plasma is produced by a high-pressure discharge from a nozzle and is delivered to the surface in the form of an air stream. The surface is activated by chemical and physical interaction between plasma and matrix. When plasmas collide with the plastic surface, the groups containing oxygen and nitrogen combine with the non-polar polymer matrix, and the plasma activation increases the surface energy and makes it become polar. Plasma contains a lot of energy -- free radicals, ions, atoms and molecular fragments -- which release that energy onto the surface of the pretreated material, triggering a chemical reaction to produce an effect. The resulting functional hydroxyl, carbonyl, and carboxyl groups (as well as nitrous oxide) have a strong chemical bond with the coating and contribute to a significant increase in adhesion. During pretreatment, the surface temperature of the plastic generally does not exceed 30℃.

 

This plasma effect leads to uniform surface wettability, which not only produces good adhesion in a few seconds, but also ensures a high quality finish with waterborne coatings. This environmentally safe process requires only compressed air as the reaction gas and electricity.

 

The on-line spray gun system of atmospheric plasma surface processor controlled by computer can be monitored by screen and is fully compatible with the machine. At the same time, the process itself is powerful. Traditional pretreatment methods can be completely eliminated by plasma treatment in most cases. Unlike the chemical solvent pretreatment method, this method does not require drying and temporary storage, so it can be used to spray parts immediately after atmospheric plasma cleaning and activation, which not only eliminates some process steps, greatly reduces energy consumption and operating costs, and improves output and product quality.


  • Categories:Company Dynamics
  • Author:plasma cleaning machine-surface treatment equipment-CRF plasma machine-Sing Fung Intelligent Manufacturing
  • Origin:
  • Time of issue:2020-11-26 09:15
  • Views:
Information

Atmospheric plasma surface treatment to change the surface energy of waterborne coatings for automotive industry:

 

How does atmospheric plasma surface treatment ensure the adhesion of waterborne coatings in automobile industry?

 

When cleaning contaminated surfaces and activating non-polar plastics, it is not possible to obtain long-term stability and flawless adhesion of paint to the surface without a subtle degree of cleaning. There are a variety of cleaning and activation methods and the use of chemical solvents is widely used, but more than 50 per cent of volatile organic compound (VOC) emissions are due to the use of solvents and spraying operations account for the majority of these emissions.

 

Surface energy is the key factor to ensure wettability and adhesion. Whether the coating can have the adhesion force needed to combine with the substrate mainly depends on the surface energy of the coating. Good wettability means that the surface of the material is ultrafine and clean, and the surface of solid material can be higher than the surface tension of liquid. Chemical solvent-based pretreatment processes are harmful to the environment and are often health-damaging, energy-consuming and costly to dispose of. So it's no surprise that in an era of increasing environmental awareness, car manufacturers are looking for alternatives, and water-based paint systems are moving toward environmentally friendly surface treatment technologies. Atmospheric plasma surface treatment technology is an environmentally friendly, economical and efficient pretreatment process.

 

Plasma surface treatment technology is a dry pretreatment process without chemical solvent, which combines three effects of micro-cleaning, electrostatic dissipation and surface synchronous activation. Plasma is produced by a high-pressure discharge from a nozzle and is delivered to the surface in the form of an air stream. The surface is activated by chemical and physical interaction between plasma and matrix. When plasmas collide with the plastic surface, the groups containing oxygen and nitrogen combine with the non-polar polymer matrix, and the plasma activation increases the surface energy and makes it become polar. Plasma contains a lot of energy -- free radicals, ions, atoms and molecular fragments -- which release that energy onto the surface of the pretreated material, triggering a chemical reaction to produce an effect. The resulting functional hydroxyl, carbonyl, and carboxyl groups (as well as nitrous oxide) have a strong chemical bond with the coating and contribute to a significant increase in adhesion. During pretreatment, the surface temperature of the plastic generally does not exceed 30℃.

 

This plasma effect leads to uniform surface wettability, which not only produces good adhesion in a few seconds, but also ensures a high quality finish with waterborne coatings. This environmentally safe process requires only compressed air as the reaction gas and electricity.

 

The on-line spray gun system of atmospheric plasma surface processor controlled by computer can be monitored by screen and is fully compatible with the machine. At the same time, the process itself is powerful. Traditional pretreatment methods can be completely eliminated by plasma treatment in most cases. Unlike the chemical solvent pretreatment method, this method does not require drying and temporary storage, so it can be used to spray parts immediately after atmospheric plasma cleaning and activation, which not only eliminates some process steps, greatly reduces energy consumption and operating costs, and improves output and product quality.

plasma surface treatment

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