How to choose a laser fume extractor?

Written by Fumeclear 

17/10/2024

Technologies such as laser cutting, engraving and welding have revolutionized a number of industries, from manufacturing to arts and crafts. However, these processes often produce harmful fumes and particles that can pose a significant health risk if not properly managed. Laser fume extractor are key devices designed to capture and filter these pollutants, ensuring a safer working environment. But with so many options to choose from, how do you select the right laser smoke cleaner for your needs? This blog will guide you on how to choose the right laser fume extractor for your needs.

Laser process smoke particles and hazards

1. Metallic Materials

· Steels

       When the laser is processing steel, the iron on the surface of the steel is oxidized under the high temperature of the laser, generating iron oxide (Fe₂O₃), iron tetraoxide (Fe₃O₄), and so on.The size of these particles varies, usually below the micron level. Some of the steel is vaporized by the laser and condenses to form metallic iron particles. If the steel contains carbon, carbon particles may be generated during laser processing. Especially when processing high carbon steels, carbon particles are produced in relatively large quantities.

       Iron oxide particles and metallic iron particles, when inhaled, can irritate the mucous membranes of the respiratory tract and cause symptoms such as coughing, phlegm and chest tightness. Prolonged exposure may lead to inflammation of the respiratory tract and decreased lung function.Carbon particles may also irritate the respiratory tract and, if the particles are small, may penetrate deeper into the lungs, increasing the risk of lung disease. 

       Prolonged exposure to fumes from laser-processed steel may also have an effect on the body's immune system, lowering the body's resistance.

· Aluminum

       When lasers are used to process steel, the aluminum surface oxidizes rapidly to form aluminum oxide (Al₂O₃) under the high temperature of the laser. These alumina particles vary in size and are usually in the submicron to micron range. Some of the aluminum is vaporized by the laser and condenses to form tiny metallic aluminum particles.

       Studies have shown that long-term inhalation of aluminum particles may have adverse effects on the nervous system, such as leading to memory loss and cognitive decline, and the potential neurological hazards of aluminum should not be ignored!

       Aluminum oxide particles and metallic aluminum particles can irritate the respiratory tract and cause symptoms such as coughing, shortness of breath, and chest tightness when inhaled by the body. Long-term exposure may lead to problems such as inflammation of the respiratory tract and damage to lung tissue. Fine particles may penetrate deep into the lungs, affecting the gas exchange function of the lungs and increasing the risk of lung disease.

· Copper

       When the laser is processing copper, the high temperature of the laser oxidizes the copper surface, producing particles such as copper oxide (CuO) and cuprous oxide (Cu₂O). The particle size of these particles usually ranges from submicron to several microns.

       Some of the copper material will vaporize under the action of the laser and then quickly condense to form tiny metallic copper particles. If there are oils, coatings, etc. on the surface of the copper, some organic volatiles may be generated during the laser process.

       Copper oxide particles and metallic copper particles may irritate the respiratory tract and cause symptoms such as coughing and shortness of breath when inhaled by humans. Prolonged exposure may lead to inflammation of the respiratory tract, lung diseases, etc. Copper and its compounds may, to a certain extent, cause damage to the liver, kidneys and other organs of the human body.

· Titanium Alloys

       When lasers are used to process titanium alloys, the titanium on the surface of the alloy is oxidized to form titanium dioxide (TiO₂) under the high temperature of the laser. The particle size of these particles is usually in the submicron to micron range.

       Some titanium alloys condense to form metallic titanium particles when vaporized by the laser. Depending on the specific composition of the titanium alloy, some other metal oxides or nitrides may also be produced. For example, if the titanium alloy contains elements such as aluminum and vanadium, the corresponding oxide particles may be formed during processing.

       When inhaled, titanium dioxide particles and titanium metal particles can irritate the mucous membranes of the respiratory tract, causing symptoms such as coughing, shortness of breath, and difficulty in breathing. Prolonged exposure may lead to inflammation of the respiratory tract and decreased lung function. Fine particles may penetrate deep into the lungs and be deposited in the alveoli, affecting the gas exchange function of the lungs and increasing the risk of lung diseases such as pneumoconiosis.

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2. Non-metallic Materials

· Plastics

       Different types of plastics decompose under the action of laser light to produce various organic compounds such as benzene, toluene, formaldehyde and vinyl chloride. These organic compounds exist in the form of tiny particles in the smoke.

       For example, polyvinyl chloride (PVC) may produce particles of decomposition products such as hydrogen chloride during processing.

       When inhaled by the human body, particles of organic compounds can strongly irritate the respiratory tract, causing symptoms such as coughing, wheezing and difficulty in breathing. Long-term exposure may lead to respiratory tract inflammation, asthma and other diseases. Some organic compounds are neurotoxic, and long-term inhalation may affect the function of the nervous system, resulting in symptoms such as dizziness, headache, memory loss, and insomnia.

· Wood

       Wood is mainly composed of cellulose, hemicellulose and lignin. Under the action of laser, cellulose combustion will produce some fine particles, such as carbon black, carbon monoxide, carbon dioxide and so on. Lignin pyrolysis at high temperature will produce some complex organic compounds, such as phenols, aldehydes, ketones, etc. These compounds will also exist in the form of particles in the smoke. If the wood contains some impurities, such as soil, sand and gravel, etc., corresponding particles may also be generated during laser processing.

       Cellulose combustion product particles and lignin pyrolysis product particles can irritate the respiratory tract and cause coughing, shortness of breath, chest tightness and other symptoms when inhaled by the body. Prolonged exposure may lead to respiratory inflammation and decreased lung function. Certain organic compounds produced by pyrolysis of wood may have adverse effects on the nervous system, such as causing dizziness, headache, fatigue, memory loss, etc.

· Leathers

       Leather consists mainly of proteins, which under the action of a laser produce particles of combustion products such as nitrogen-containing compounds and carbon black. If the leather is dyed or chemical additives are used, the corresponding dye particles and additive decomposition product particles may be generated during the process. Leather may contain some organic solvents, oils and fats, etc., in the laser processing will evaporate to form organic volatiles.

       Protein combustion product particles and dye particles, etc. can irritate the respiratory tract and cause symptoms such as coughing, wheezing, and difficulty breathing when inhaled by the body. Prolonged exposure may lead to inflammation of the respiratory tract, decreased lung function, etc.

· Acrylic

       Acrylic is pyrolyzed under high laser temperatures to produce a number of organic compounds such as methyl methacrylate monomer, benzene, and aldehydes. 

       These compounds exist in the form of tiny particles in the smoke. Some acrylic in incomplete combustion will produce carbon particles.

       Acrylic pyrolysis product particles can strongly irritate the respiratory tract when inhaled by the body, causing symptoms such as coughing, shortness of breath and chest tightness.Long-term exposure may lead to respiratory inflammation, asthma and other diseases.Some pyrolysis products may be neurotoxic, long-term inhalation may affect the function of the nervous system, dizziness, headache, memory loss, insomnia and other symptoms. 

· Page

       Paper consists mainly of cellulose, and combustion under the action of a laser produces products such as carbon black, carbon monoxide and carbon dioxide in the form of tiny particles. If the paper contains additives such as fluorescent whiteners, fillers, etc.

       Cellulose combustion product particles and additive particles, when inhaled, may irritate the respiratory tract and cause coughing, wheezing, and throat irritation. Prolonged exposure may cause inflammation of the respiratory tract. Certain additive particles may be potentially toxic to humans and prolonged exposure may affect health.

3. Composite Materials

· Carbon Brazed Composites

       Carbon fiber composites are usually composed of carbon fibers and resin. Laser processing causes pyrolysis of the resin, which produces a variety of organic compounds, such as benzene, toluene, and formaldehyde, in the form of particles in the smoke.Under the action of the laser, carbon fibers may fracture, vaporize and condense to form tiny carbon fiber particles. 

       Carbon fiber particles, when inhaled, may irritate the respiratory tract, causing symptoms such as coughing, wheezing, and difficulty breathing. Prolonged exposure may lead to inflammation of the respiratory tract and decreased lung function.

       Resin pyrolysis product particles are strong irritants to the respiratory tract and can trigger coughing, chest tightness and asthma. Some organic compounds may also cause damage to the lungs, increasing the risk of diseases such as lung cancer.

· Glass Fiber Composites

       Similar to carbon fiber composites, glass fiber composites usually contain resins, and laser processing causes the resins to pyrolyze to produce particles of various organic compounds, such as benzene, toluene, and formaldehyde. Under the action of the laser, glass fibers may break and shatter to form tiny glass fiber particles. It may also produce carbon monoxide, carbon dioxide, etc.

       Fiberglass particles, when inhaled, can irritate the mucous membranes of the respiratory tract, causing symptoms such as coughing, wheezing, and chest tightness. Prolonged exposure may lead to respiratory tract inflammation, lung tissue damage and other problems. Certain pyrolysis products may have a damaging effect on the nervous system, liver, kidneys and other organs of the body. Prolonged exposure to such fumes may affect the immune system and lower the body's resistance.

4. Other Specialized Materials

· Gemstones

       Different kinds of gemstones have different compositions, e.g. diamonds are mainly carbon and rubies are mainly aluminum oxide.

       Under the action of a laser, gemstones produce corresponding dust particles. Some impurities that may be present in gemstones may also form particles during processing.

       Gemstone dust particles, when inhaled, can irritate the respiratory tract and cause symptoms such as coughing, wheezing and chest tightness. Long-term exposure may lead to respiratory inflammation and decreased lung function. For some harder gemstone dusts, such as diamond dust, it may cause more serious damage to the lungs.

· Ceramics

       Depending on the specific composition of the ceramic, this may include particles of alumina, silicon oxide, zirconium oxide, etc. The size and shape of these particles vary depending on the processing conditions. If the ceramic contains additives, such as fluxes, pigments, etc., corresponding particles may be generated during laser processing.

       Ceramic material particles and additive particles, when inhaled, can irritate the respiratory tract and cause symptoms such as coughing, wheezing, and difficulty breathing. Prolonged exposure may lead to inflammation of the respiratory tract and decreased lung function. Some fine particles may penetrate deep into the lungs and be deposited in the alveoli, increasing the risk of lung disease.

Laser fume Extractor selection of factors to focus on

1. Filtration Efficiency

· HEPA filters - the "nemesis" of particulate matter

       HEPA filters play a key role in the laser smoke cleaning process. They are known for their excellent filtration accuracy, capturing particles as small as 0.3 microns and achieving over 99.97% filtration efficiency for particles larger than 0.3 microns. 

       When the laser cuts metal, a large number of metal particles are generated instantly, such as iron oxide particles generated when cutting steel and aluminum oxide particles when cutting aluminum, etc. No matter how fine they are, the HEPA filter acts as a precision “sieve”, blocking them out and preventing them from being suspended in the air and inhaled by the human body. This not only safeguards the operator's lungs from attack, but also prevents particles from settling and causing damage to the equipment. For example, in a precision electronic component laser processing workshop, if the smoke particles are not effectively filtered and deposited on the components, the product quality and performance will be seriously affected, and HEPA filters can be a good solution to this problem, greatly improving air quality!

· Activated carbon filters - the "master adsorber" of harmful gases

       Activated carbon filters specialize in the treatment of harmful gases from laser processing. Volatile organic compounds (VOCs) such as benzene, toluene, formaldehyde and other gases that are extremely harmful to the human body are released when cutting materials such as plastic and rubber. With its own rich pore structure and huge specific surface area, activated carbon acts like a powerful "sponge" to quickly adsorb these harmful gas molecules and reduce the concentration of harmful gases in the air. At the same time, it can also effectively remove odors, and its role is more prominent in places with stringent air quality requirements, such as medical equipment manufacturing workshops and laboratories.

       For example, in the working environment of laser cutting plastic products, the activated carbon filter can adsorb the harmful gases in time to avoid the poisoning of the operators and ensure a fresh and odorless working environment.

       In summary, it is recommended that you choose a smoke cleaner that includes both filters. This is the key to safeguarding your health, proper equipment operation, environmental compliance, and improved work efficiency. 

       Only by choosing a purifier with high filtration capacity can you make the laser processing work environment safer, more comfortable and more environmentally friendly!

       Fumeclear® FC-2003 Fume Extractor 194CFM uses advanced filtration technology to achieve up to 99.97% evolutionary effect, creating a clear and healthy workspace for you.

2. Suction Capacity

       In the field of laser processing, choosing a smoke cleaner with sufficient suction capacity is a critical part of ensuring a safe and healthy working environment.

       Fumes and particles generated during laser processing can cause serious problems if not cleaned up in a timely manner. Choose a laser fume cleaner with sufficient suction capacity to ensure removal of fumes and particles.