Use the heat of laser radiation to weld and join plastic parts. When the base material is irradiated with a laser, gas bubbles are generated inside the material due to the thermal effect of the radiation. The available types of lasers—such as CO2 lasers, YVO4 lasers, and YAG lasers—depends on the target material and the desired marking method. Plastic laser marking. The highly visible, print-like finishing does not disappear like ink. A great diversity of plastics are being deployed especially in the automotive or medical industry. This site is managed by KEYENCE CORP. Remove/engrave the surface layer with a laser. This section describes information ranging from the principles of plastic marking and processing to advantages grouped by laser wavelength. Laser light is applied to a mask surface, and only those parts that pass through the mask are marked. The laser choice will depend on the application requirements. Damage-free marking is the best method for marking targets where damage to the product surface or the inside due to laser energy is a concern. Laser marking is a type of non-contact marking. Learn all about basic laser topics such as oscillation principles and characteristics according to wavelength. Carbonizing on the other hand enables strong contrasts on bright surfaces. In the White Paper you will learn that the quality of the marking is determined by the type of the selected laser etching system, the utilized marking parameters, but also by the selection of special additives in the plastic mix. In this section, you will find applications in a wide variety of industries as well as detailed examples showing the advantages in using laser markers. This method provides contrast against the base material colour by peeling the paint, printed surface, or plating layers of a target for marking. Generally, the fiber laser generates a white mark on any plastic base color. You will surely find a suitable laser for your product making. When an area continuously receives high energy, macromolecules of the element around the base material are carbonised and turn black. Laser marking is a non-contact optical process in which the plastic has to absorb the laser beam. This section introduces marking techniques and laser selection according to the material. This results in increased labour and costs when marking various patterns. All Rights Reserved. Utilising high-output laser light, laser markers are capable of high-speed marking for efficient production. Laser marking is a permanent and customizable method of marking plastic parts. The surface of the target itself is coloured, resulting in high-contrast areas. Laser markers can be used to perform various marking tasks, including the following. Depending on the material structure and size, different laser sources (e. g. fiber lasers) or laser machines (e. g. galvo lasers) can be used to further increase the speed. Laser marking on plastic can be obtained with either a CO 2 or a fiber laser source. From PET bottles to thin film materials, marking can be achieved with no pin holes. Conventional scanning methods only allow control from the X and Y axes, meaning the light could only be scanned on a flat surface. PVC, ABS, and polystyrene, both fundamental and green lasers show low transmission ratio and high absorption ratio, which ensures good marking. The types of laser used and some practical examples of laser processing. Laser markers use laser light irradiated to a specific point, making high-accuracy marking possible. along with other resins for marking with variety of different lasers like 1064 nm Nd:YAG-Laser, fiber laser and solid state lasers. Copyright (C) 2021 KEYENCE CORPORATION. Laser Marking for Plastic. Direct ink printing puts an image on the surface of the plastic which can be removed by abrasion or solvents, but Laser marking can provide an indelible high-contrast mark in the material itself, with no direct contact with the plastic other than through the incident Laser beam. Laser-based marking is performed as follows. Challenges for Plastic Laser Marking Machine Manufacturers. Marking provides a print-like finishing on designs and other surfaces that cannot be erased. This results in high productivity and cost benefits during manufacture. The surface of a target is removed, marked, or engraved in some way. Laser Marking Plastic Arthur Brodskiy 2019-09-11T16:31:47-04:00 LASER MARKING Molded plastic parts have become ubiquitous components of industrial equipment, medical devices, aerospace & aviation components, vehicle & marine parts and common household appliances. Markings are white and clear, making for an ideal replacement for stamps, labels, and printing. Marking is split into two main categories: "contact marking" and "non-contact marking”. Consequently, the composition of the element itself changes chemically, resulting in colour development due to the increased intensity of the pigment. Laser Engraving Enables Cost-Effective Day-and-Night Markings on Plastic Parts. Learn all about basic laser topics such as oscillation principles and characteristics according to wavelength. Topics: Based on the nature of the plastic, its functional purpose and its intended use the requirements for its marking are varying. This is due to the fact that - compared to conventional marking procedures - no templates or consumables such as ink are required. Irradiation from the laser light results in a highly visible white colour on the surface of the plastic. Even small characters can be easily identified, ensuring reliable quality control. Our laser marking additives can be used in polyolefins like PP, HDPE, PS, ABS, PC, TPU, PET, PBT, Nylon, PVC and TPE etc. Peel the paint or printing on the target surface to bring out the contrast with the colour of the base material. The markings produced in laser marking operations contrast with the material surface, making them easy for both humans and machines to read. Degree of depth is the primary distinguishing factor. This section introduces marking techniques and laser selection according to the material. More specifically, a laser light emitted from an oscillator is captured (scanned) by the scanning mirror and applied to the surface of the target for marking. Laser marking with colour change is basically an electrical process, which reorders the macromolecules (changing their direction). The laser radiation changes the crystal structure of the ions and the hydration level in the crystal. Plastic Processing Plastic marking The optimal laser marker for this task is a hybrid laser marker that has a high peak power within the fundemental wavelength. When the base material absorbs the laser energy, the thermal effect increases the molecular density. Color Laser Marking on Plastics As of this writing, color laser markings for plastics is still limited, but recently developed techniques may … This has resulted in an increase in scanning systems that allow for a higher degree of freedom. Irradiate a plastic target with a laser to develop a colour in the target itself. The laser marking process accommodates a variety of materials, ranging from metal and plastic to leather, glass, wood, and more. The contact-free method can also be used to mark hard-to-reach and curved surfaces of the part. Copyright (C) 2021 KEYENCE CORPORATION. “What exactly is a laser?” “What are the principles behind lasers?” Whether you’re interested in basic knowledge questions like these or more in-depth information such as oscillator structures, these technical references provide the answers in an easy-to-understand way. Our laser marking additives can be used in polyolefins like PP, HDPE, PS, ABS, PC, TPU, PET, PBT, Nylon, PVC and TPE etc. On the other hand, the transmission ratio for polyimide is about 30% with a green laser (532 nm) but more than 90% with a fundamental laser (1064 nm). Laser marking plastic Lasers mark plastic components not only permanently and flexibly, but also very environmentally and material friendly. Selecting the best marking method ensures damage-free marking regardless of the target material. Laser Marking is a permanent marking process where discoloration occurred at the surface when a low powered laser beam reacts with the surface of a material, by changing the material properties.. The laser marking machine for plastic works on a low power level and longer pulses. This section introduces the principles, characteristics, and advantages of laser marking—a type of laser processing—as well as typical processing examples. It introduces marking examples and the optimal laser markers for a variety of materials such as ABS, epoxy, and PET. By using Ytterbium Fiber Laser (1062 nm) technology, the laser quickly creates a permanent mark on your plastic part by reacting with the chemicals in the plastic to create a colored mark on the plastic, whether it is black, white, orange, or many other colors of plastic. In the case of plastics, the process is characterized by a fast marking speed and low cycle times. The types of laser used and some practical examples of laser processing. It introduces marking examples and the optimal laser markers for a variety of materials such as ABS, epoxy, and PET. The graph below shows the transmission ratio of a fundamental laser (1064 nm), a green laser (532 nm), and a UV laser (355 nm) for various plastic materials. Laser marking is a non-contact optical process in which the plastic has to absorb the laser beam. This behavior is also utilized in the laser welding of plastics, during which one welding partner absorbs the laser beam and the other welding partner is transparent to the laser beam. Should a plastic’s properties dictate that it cannot be laser … The most common processes of laser marking on plastic are carbonization, color change, foaming and engraving. Laser markers can be roughly divided into two types: masking laser markers and scanning laser markers. The molecules are condensed and the colour changes to a darker colour. Laser markings on plastic surfaces are always smudge and abrasion resistant. When the base material is irradiated with a laser, gas bubbles are generated inside the material due to the thermal effect of the radiation. Laser Marking Plastics? Should a plastic’s properties mean that it cannot be laser marked, it can usually … Recently, marking applications with various types have become common, and the high-speed capabilities of scanning lasers help cover weaker aspects of production. Check out our 2020 buyer's guide to the top 10 laser marking machines. When an area continuously receives high energy, macromolecules of the element around the base material are carbonised and turn black. This section introduces the basic principles and features of laser marking as well as marking examples. The laser radiation changes the crystal structure of the ions and the hydration level in the crystal. The absorption ratio varies greatly depending on the wavelength. Irradiate a plastic target with a laser to develop a color in the target itself. All Rights Reserved. Laser marking is one of the fastest marking processes available in the market. Irradiation from the laser light results in a black colour on the surface of the plastic. Scanning irradiates a target with a single laser light, and marking is performed in a stroke-like motion. Marking provides a print-like finishing on designs and other surfaces that cannot be erased. Using a laser with a short wavelength (9.3 μm) enables clear marking with minimal damage. These scanning mirrors are called galvano mirrors, and a system that uses one or more of these mirrors is called a “galvano scanner” or “galvano mirror scanning system”. Laser-based colouration can be divided into four main principles. These bubbles are particularly visible with darker base materials and result in “thin” colouration. Many plastics and thermoplastics can be laser marked. By using laser radiation to develop a color instead of engraving the plastic, damage from marking the target is minimized. Laser marking: The laser beam acts by decoloring the heated surface (clear marking on dark plastic or grey or black marking on clear material). No material is removed, but some foaming is possible. Today’s laser markers, however, can control the Z-axis height using a scanning mirror, making it possible to mark a wide variety of targets with various shapes. These bubbles are particularly visible with darker base materials and result in “thin” colouration. You will surely find a suitable laser for your product making. Learn About Plastic Engraving Machines CO2 Laser Marking Machine: Rliable, cost-effective performance and high-quality marking for plastics and a wide range of other materials. The surface of a target is scorched, oxidised, or discoloured by the laser light. Marking visibility and durability . The surface of a target is cut or engraved. This page shows some applications and information of laser processing. The laser process terms “laser marking”, “laser etching”, “laser engraving” are often interchanged, however the technical aspects have important distinctions. Color laser engraving can essentially be broken down into two subsets, that of color laser engraving on metal and color laser marking on plastic. The “pigment” elements in the base material always contain metallic ions. Pin holes can appear as a result of overheating when marking under high power. Laser marking causes physical and chemical changes on the surface of the plastic, thus causing marks that are more permanent than standard ink printing or etching. White paper "Plastic laser marking" Based on the properties of a plastic, its functional purpose and its intended use the requirements for marking it are varying. The “pigment” elements in the base material always contain metallic ions. Gasified, evaporated bubbles are contained in the surface layer of the base material and create a whitish swelling. This behaviour is also used in the laser welding of plastics, during which one welding partner absorbs the laser beam and the other welding partner is transparent for the laser beam. With laser marking, however, there is no need to worry that marked content will disappear over time. Laser engraving plastic demands both scientific and creative approach. The laser works with a maximum pulse rate, but low energy per pulse. Foaming works on all polymers, but also on some metals. along with other resins for marking with variety of different lasers like 1064 nm Nd:YAG-Laser, fiber laser and solid state lasers. Gasified, evaporated bubbles are contained in the surface layer of the base material and create a whitish swelling. Masking enables high-speed, high-resolution marking, but masks that match the content being marked must be prepared. The molecules are condensed and the colour changes to a darker colour. 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