New Laser Cleaning Technology for Stone Products-ShangHai RunQia Electronics Technology Co.,Ltd.

New Laser Cleaning Technology for Stone Products

Granite features uniform and consistent tone as well as tough and wear-resistant texture, while marble presents soft and elegant colors with natural and fresh grain patterns. They beautify our living environment and allow us to fully appreciate the beauty and charm of nature. During service, regular cleaning and maintenance are essential. With the advancement of science and technology, stone cleaning technology is evolving rapidly. Traditional labor-intensive cleaning methods are gradually becoming outdated, while innovative technological cleaning solutions have emerged.

In terms of cleaning mechanism, laser cleaning technology of Shanghai Runqia can be divided into the following two categories:

Absorption Coefficient MechanismMost of the laser energy radiated to the surface is absorbed by surface attachments. The contaminants are heated, gasified and evaporated, or expand instantaneously, then carried away from the object surface by the vapor flow generated on the surface to achieve the cleaning effect. The substrate absorbs very little energy of this laser wavelength and thus remains undamaged. For this type of laser cleaning, selecting an appropriate laser wavelength and precisely controlling laser energy is the key to safe and efficient cleaning.

Impact Peeling MechanismThis method is applicable to scenarios where the laser energy absorption coefficient of the substrate is close to that of surface attachments, or where the substrate is sensitive to acidic vapor generated by heated coatings, or the coating may produce toxic substances when heated. It generally adopts high-power and high-repetition-rate pulsed laser to impact the surface to be cleaned, converting part of the laser beam into acoustic waves. After the acoustic waves strike the underlying hard surface, the reflected waves collide with incident laser acoustic waves to generate micro-explosions. The coating is shattered and crushed into powder, then removed by a vacuum pump, leaving the underlying substrate intact and undamaged.

Laser possesses outstanding characteristics of high brightness, high directivity, high monochromaticity and high coherence, which are incomparable to ordinary light sources. Leveraging its high brightness, laser can be focused by a lens to generate a temperature of thousands to tens of millions of degrees near the focal point. Its high directivity enables effective long-distance transmission. Extremely high monochromaticity with a single wavelength facilitates focusing and wavelength selection.

Compared with traditional cleaning methods such as mechanical friction cleaning, chemical corrosion cleaning, liquid-solid high-pressure impact cleaning and high-frequency ultrasonic cleaning, Shanghai Runqia laser cleaning has remarkable advantages:It is efficient, fast and low-cost; it imposes low thermal and mechanical load on the substrate without causing any damage; the waste is recyclable and pollution-free; it is safe and reliable with no harm to operators’ health; it is multi-functional and capable of removing coatings of different thicknesses and compositions; the cleaning process is easy to realize automatic control and remote intelligent cleaning.

The above content is provided by Shanghai Runqia Electronic Technology Co., Ltd.Please feel free to contact us if you have any inquiries.

Tel: 021-52667932, 52665732 Fax: 021-51686932 Email: sales@runqia.com

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