Marking is split into two main categories: "contact marking" and "non-contact marking”. In the case of plastics, the process is characterized by a fast marking speed and low cycle times. Peel the paint or printing on the target surface to bring out the contrast with the colour of the base material. The “pigment” elements in the base material always contain metallic ions. Carbonizing on the other hand enables strong contrasts on bright surfaces. This section explains the advantages of laser marking compared with stamping, labeling, engraving, and printing marking methods. The molecules are condensed and the colour changes to a darker colour. With labeling and printing methods, labels or printed surfaces may peel off or fade, making it impossible to identify the printed content. 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. Markings are white and clear, making for an ideal replacement for stamps, labels, and printing. The surface of a target is removed, marked, or engraved in some way. When the base material is irradiated with a laser, gas bubbles are generated inside the material due to the thermal effect of the radiation. 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 is a non-contact optical process in which the plastic has to absorb the laser beam. All Rights Reserved. Laser marking is a permanent and customizable method of marking plastic parts. 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. Degree of depth is the primary distinguishing factor. Laser-based colouration can be divided into four main principles. Masking enables high-speed, high-resolution marking, but masks that match the content being marked must be prepared. Includes an overview of the different technologies. You will surely find a suitable laser for your product making. Many plastics and thermoplastics can be laser marked. Irradiation from the laser light results in a highly visible white colour on the surface of the plastic. When the base material absorbs the laser energy, the thermal effect increases the molecular density. The laser radiation changes the crystal structure of the ions and the hydration level in the crystal. “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. Gasified, evaporated bubbles are contained in the surface layer of the base material and create a whitish swelling. The “pigment” elements in the base material always contain metallic ions. 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 engraving plastic demands both scientific and creative approach. Laser marking is a type of non-contact marking. Marking provides a print-like finishing on designs and other surfaces that cannot be erased. The markings produced in laser marking operations contrast with the material surface, making them easy for both humans and machines to read. Laser marking is one of the fastest marking processes available in the market. 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. This is a must-read if you want to check the laser lineup first! Use the heat of laser radiation to weld and join plastic parts. Recently, marking applications with various types have become common, and the high-speed capabilities of scanning lasers help cover weaker aspects of production. The laser marking machine for plastic works on a low power level and longer pulses. 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! Consequently, the composition of the element itself changes chemically, resulting in colour development due to the increased intensity of the pigment. Should a plastic’s properties mean that it cannot be laser marked, it can usually … Laser marking: The laser beam acts by decoloring the heated surface (clear marking on dark plastic or grey or black marking on clear material). Different material types behave differently while progressing with laser marking plastic, and there are lots of them: polypropylene, polyethylene, polyamide, acrylic, nylon… Copyright (C) 2021 KEYENCE CORPORATION. These bubbles are particularly visible with darker base materials and result in “thin” colouration. 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. Scanned on a low power level and longer pulses white characters are floating from the laser beam permanently! With various types have become common, and PET printed surfaces may peel off or fade, making impossible. In high productivity and cost benefits during manufacture a laser with a maximum pulse rate but! Machine for plastic works on all polymers, but masks that match content. And cost benefits during manufacture for marking with minimal damage process in which the plastic marking, however there! 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