“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. These bubbles are particularly visible with darker base materials and result in “thin” colouration. 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). This section introduces the basic principles and features of laser marking as well as marking examples. 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. Masking enables high-speed, high-resolution marking, but masks that match the content being marked must be prepared. This results in high productivity and cost benefits during manufacture. Topics: Based on the nature of the plastic, its functional purpose and its intended use the requirements for its marking are varying. Copyright (C) 2021 KEYENCE CORPORATION. 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 process accommodates a variety of materials, ranging from metal and plastic to leather, glass, wood, and more. Utilising high-output laser light, laser markers are capable of high-speed marking for efficient production. Color laser engraving can essentially be broken down into two subsets, that of color laser engraving on metal and color laser marking on plastic. In most cases pressing too much when marking can be counterproductive and can decrease the final contrast, so it is better to start with 1 repetition and gradually increase them. Our laser marking additives can be used in polyolefins like PP, HDPE, PS, ABS, PC, TPU, PET, PBT, Nylon, PVC and TPE etc. 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 laser works with a maximum pulse rate, but low energy per pulse. Scanning irradiates a target with a single laser light, and marking is performed in a stroke-like motion. The types of laser used and some practical examples of laser processing. Markings are white and clear, making for an ideal replacement for stamps, labels, and printing. 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. Should a plastic’s properties mean that it cannot be laser marked, it can usually … This section introduces the principles, characteristics, and advantages of laser marking—a type of laser processing—as well as typical processing examples. 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. When the base material is irradiated with a laser, gas bubbles are generated inside the material due to the thermal effect of the radiation. Total Solutions for High Contrast Laser Marking of Plastic. 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. Laser marking is a type of non-contact marking. (Example) Wide-area marking on LSI. The contact-free method can also be used to mark hard-to-reach and curved surfaces of the part. Laser marking with colour change is basically an electrical process, which reorders the macromolecules (changing their direction). Laser markers can be used to perform various marking tasks, including the following. Learn all about basic laser topics such as oscillation principles and characteristics according to wavelength. Gasified, evaporated bubbles are contained in the surface layer of the base material and create a whitish swelling. Marking that appears as if the white characters are floating from the surface is possible with transparent/translucent PET plastic. This section describes information ranging from the principles of plastic marking and processing to advantages grouped by laser wavelength. Includes an overview of the different technologies. The surface of the target itself is coloured, resulting in high-contrast areas. 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. 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. Consequently, the composition of the element itself changes chemically, resulting in colour development due to the increased intensity of the pigment. PVC, ABS, and polystyrene, both fundamental and green lasers show low transmission ratio and high absorption ratio, which ensures good marking. A great diversity of plastics are being deployed especially in the automotive or medical industry. Many plastics and thermoplastics can be laser marked. The surface of a target is removed, marked, or engraved in some way. The molecules are condensed and the colour changes to a darker colour. Laser markers can be roughly divided into two types: masking laser markers and scanning laser markers. All Rights Reserved. Laser engraving plastic demands both scientific and creative approach. The CO 2 laser is more often used for etching or engraving on the plastic. In the case of plastics, the process is characterized by a fast marking speed and low cycle times. along with other resins for marking with variety of different lasers like 1064 nm Nd:YAG-Laser, fiber laser and solid state lasers. This is a must-read if you want to check the laser lineup first! This page shows some applications and information of laser processing. Marking provides a print-like finishing on designs and other surfaces that cannot be erased. This section describes information ranging from the principles of plastic marking and processing to advantages grouped by laser wavelength. It introduces marking examples and the optimal laser markers for a variety of materials such as ABS, epoxy, and PET. Peel the paint or printing on the target surface to bring out the contrast with the colour of the base material. This results in increased labour and costs when marking various patterns. 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. When the base material absorbs the laser energy, the thermal effect increases the molecular density. The absorption ratio varies greatly depending on the wavelength. 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. When the base material absorbs the laser energy, the thermal effect increases the molecular density. Irradiation from the laser light results in a highly visible white colour on the surface of the plastic. Lasers can be used for a variety of marking methods including surface melting and scorching, plating and paint peeling, oxidisation, and discolouration. Learn all about basic laser topics such as oscillation principles and characteristics according to wavelength. Laser engraving has replaced conventional two-part injection molding and rotary engraving as the preferred method for rapid production of custom day-and-night marks because of its speed, operational flexibility, and mark quality. 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. Laser Marking Basics is designed to learn about laser marking applications and includes information on laser principles, types, and marking. Plastic laser marking. The available types of lasers—such as CO2 lasers, YVO4 lasers, and YAG lasers—depends on the target material and the desired marking method. 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 marking is performed as follows. Degree of depth is the primary distinguishing factor. The laser process terms “laser marking”, “laser etching”, “laser engraving” are often interchanged, however the technical aspects have important distinctions. Laser marking plastic Lasers mark plastic components not only permanently and flexibly, but also very environmentally and material friendly. Many plastics and thermoplastics can be laser marked. Laser Marking for Other Materials (Glass / Paper / Ceramics / Other), Laser Marking for 2D Codes (Data matrix / QR Code / Barcode), Process Improvements from Mould Machining. Laser marking: The laser beam acts by decoloring the heated surface (clear marking on dark plastic or grey or black marking on clear material). 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. Copyright (C) 2021 KEYENCE CORPORATION. This method provides contrast against the base material colour by peeling the paint, printed surface, or plating layers of a target for marking. It introduces marking examples and the optimal laser markers for a variety of materials such as ABS, epoxy, and PET. Carbonizing on the other hand enables strong contrasts on bright surfaces. Laser light is applied to a mask surface, and only those parts that pass through the mask are marked. This site is managed by KEYENCE CORP. When an area continuously receives high energy, macromolecules of the element around the base material are carbonised and turn black. The highly visible, print-like finishing does not disappear like ink. This is due to the fact that - compared to conventional marking procedures - no templates or consumables such as ink are required. Even small characters can be easily identified, ensuring reliable quality control. Irradiate a plastic target with a laser to develop a color in the target itself. Laser Marking Plastics? Laser Cut Nylon Services Nylon is a man-made synthetic fiber that is known for its elasticity and strength. 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. By using laser radiation to develop a color instead of engraving the plastic, damage from marking the target is minimized. Recently, marking applications with various types have become common, and the high-speed capabilities of scanning lasers help cover weaker aspects of production. 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