{"id":5429,"date":"2026-08-18T11:02:51","date_gmt":"2026-08-18T09:02:51","guid":{"rendered":"https:\/\/www.couth.com\/plasticos\/"},"modified":"2026-09-28T09:56:53","modified_gmt":"2026-09-28T07:56:53","slug":"plastics","status":"publish","type":"page","link":"https:\/\/www.couth.com\/en\/plastics\/","title":{"rendered":"Plastics"},"content":{"rendered":"\t\t
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\n\t\t\t\t\tMaterials \u00b7 Plastics<\/span>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Laser Marking of Plastics for Industrial Identification and Traceability\n<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Laser marking of plastics<\/b> allows for the application of permanent, legible, and clean information on plastic parts, technical components, housings, connectors, protective covers, caps, labels, plates, packaging, auxiliary supports, and polymer surfaces used in industrial environments. This identification can include part numbers, lot numbers, dates, serial numbers, DataMatrix codes, QR codes, barcodes, logos, pictograms, or variable production data.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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What Are Plastic Materials in Industrial Marking\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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In industrial marking, <\/span>plastic materials<\/b> are natural or synthetic polymers used to manufacture parts, containers, components, labels, housings, connectors, plates, packaging, protective covers, or technical elements. They can take the form of thermoplastics, thermosets, elastomers, technical plastics, engineering plastics, or polymer matrix composites.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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In sectors such as <\/span>metallurgy, steelmaking, automotive, aerospace, rail, and oil and gas<\/b>, plastics can be found in technical parts, connectors, housings, protective covers, labels, packaging, spacers, caps, document holders, or auxiliary components associated with identification and traceability processes. They are also used in electronics, industrial packaging, logistics, food, beverages, cosmetics, and general industrial manufacturing.<\/span><\/p>

Unlike metals, plastics exhibit a wide range of behaviors when exposed to a laser. The polymer composition, pigments, fillers, additives, color, surface finish, thickness, and thermal sensitivity directly influence the contrast, depth, texture, and durability of the mark. Therefore, the choice of marking system must be based on the exact type of plastic and on actual testing when the application requires it.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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COUTH LASER offers industrial marking and traceability solutions using laser technologies such as <\/span>CO\u2082, fiber, and MOPA<\/b>. For applications on plastics, the selection of technology must take into account the material, finish, type of mark, production speed, legibility, contrast, expected durability, and in-line integration.<\/span><\/p>

In the industrial sectors where COUTH operates, plastics typically appear as functional or auxiliary elements related to metal parts, subassemblies, replacement parts, equipment, tools, production lines, and traceability systems.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Among the most common plastics in industrial applications are:<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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  • ABS.<\/span><\/li>
  • Polyamide \u2014PA\u2014.<\/span><\/li>
  • Polycarbonate \u2014PC\u2014.<\/span><\/li>
  • Polypropylene (PP).<\/span><\/li>
  • Polyethylene (PE).<\/span><\/li>
  • PET.<\/span><\/li>
  • PBT.<\/span><\/li>
  • PMMA.<\/span><\/li>
  • PVC.<\/span><\/li>
  • POM.<\/span><\/li>
  • TPU.<\/span><\/li>
  • Reinforced plastics.<\/span><\/li>
  • Glass-fiber-reinforced plastics.<\/span><\/li>
  • Mineral-filled plastics.<\/span><\/li>
  • Colored or additive-modified plastics.<\/span><\/li>
  • Films, labels, and packaging materials.<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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    Each material can react differently to the laser. Some produce dark contrast, while others produce lighter contrasts, foaming, surface ablation, texture changes, or coating removal. Therefore, referring to \u201cplastics\u201d in general terms is not sufficient to define a marking solution.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    What Industrial Plastic Marking Entails\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Industrial plastic marking involves making controlled modifications to the polymer\u2019s surface to achieve legible and stable identification. The result can be visual, functional, or traceable, depending on whether the goal is human readability, machine readability, wear resistance, or integration with digital systems.<\/span><\/p>

    In sectors such as automotive, aerospace, rail, oil and gas, metallurgy, and steelmaking, marking may be aimed at identifying technical components, connectors, spare parts, auxiliary supports, packaging, protective covers, or traceability elements associated with industrial parts and equipment. In these contexts, the mark must be compatible with the component\u2019s actual use, handling, storage, code reading, and subsequent processes.<\/span><\/p>

    With plastics, marking does not depend solely on laser power. The material\u2019s composition, additives, color, wavelength absorption, melting temperature, heat sensitivity, and surface finish all play a decisive role. Two visually similar plastics can behave very differently during marking.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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    Can plastics be marked industrially?\n<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Yes. Plastics can be marked industrially using laser technology, provided the material responds appropriately and the marking parameters are adjusted correctly. The choice between CO\u2082, fiber, or MOPA depends on the type of plastic, its composition, surface finish, required contrast, production speed, and expected durability.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Plastic Characteristics That Influence Marking\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    Plastics have specific properties that determine the outcome of laser marking. Before selecting a marker, it is advisable to analyze the actual material and its conditions of use.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Polymer Type<\/h3>

    ABS, PA, PC, PET, PP, PE, PBT, PMMA, PVC, POM, and TPU do not respond to the laser in the same way. Each polymer absorbs energy differently and can produce distinct effects on the surface.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Pigments and Color<\/h3>

    Color directly influences contrast. On some dark plastics, a light mark created by foaming may be desired; on light plastics, a dark contrast resulting from carbonization or color change may be sought. Pigments can also enhance or alter the response to the laser.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Additives and Fillers<\/h3>

    Additives, flame retardants, fibers, mineral fillers, stabilizers, lubricants, or special compounds can influence laser absorption, contrast, and the durability of the mark.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Surface Finish<\/h3>

    Smooth, rough, textured, glossy, matte, painted, varnished, or coated surfaces can produce different results. The finish affects both visual and automatic readability.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Thermal Sensitivity<\/h3>

    Some plastics are heat-sensitive and may warp, melt, or change texture if excessive energy is applied. Parameters must be adjusted to achieve contrast without damaging the part.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Part Thickness<\/h3>

    Thickness determines the permissible energy level. On thin films, labels, or packaging, marking must avoid weakening, perforation, or deformation. On thicker technical parts, more intense interaction may be permissible.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Geometry<\/h3>

    Curved, ribbed, small, embossed, or hard-to-reach parts require careful consideration of the marking position, focal length, clamping method, and subsequent reading.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Reading Requirements<\/h3>

    If the mark includes DataMatrix, QR, or barcodes, it is necessary to validate contrast, resolution, size, quiet zone, lighting, and the reading system.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Usage Environment<\/h3>

    The mark may be exposed to abrasion, temperature, humidity, chemicals, cleaning agents, UV rays, oils, or handling. These factors determine the type of marking and its durability.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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    Polymer Type<\/div>

    ABS, PA, PC, PET, PP, PE, PBT, PMMA, PVC, POM, and TPU do not respond to the laser in the same way. Each polymer absorbs energy differently and can produce distinct effects on the surface.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t

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    Pigments and Color<\/div>

    Color directly influences contrast. On some dark plastics, a light mark created by foaming may be desired; on light plastics, a dark contrast resulting from carbonization or color change may be sought. Pigments can also enhance or alter the response to the laser.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t

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    Additives and Fillers<\/div>

    Additives, flame retardants, fibers, mineral fillers, stabilizers, lubricants, or special compounds can influence laser absorption, contrast, and the durability of the mark.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t

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    Surface Finish<\/div>

    Smooth, rough, textured, glossy, matte, painted, varnished, or coated surfaces can produce different results. The finish affects both visual and automatic readability.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t

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    Thermal Sensitivity<\/div>

    Some plastics are heat-sensitive and may warp, melt, or change texture if excessive energy is applied. Parameters must be adjusted to achieve contrast without damaging the part.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t

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    Part Thickness<\/div>

    Thickness determines the permissible energy level. On thin films, labels, or packaging, marking must avoid weakening, perforation, or deformation. On thicker technical parts, more intense interaction may be permissible.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t

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    Geometry<\/div>

    Curved, ribbed, small, embossed, or hard-to-reach parts require careful consideration of the marking position, focal length, clamping method, and subsequent reading.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t

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    Reading Requirements<\/div>

    If the mark includes DataMatrix, QR, or barcodes, it is necessary to validate contrast, resolution, size, quiet zone, lighting, and the reading system.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t

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    Usage Environment<\/div>

    The mark may be exposed to abrasion, temperature, humidity, chemicals, cleaning agents, UV rays, oils, or handling. These factors determine the type of marking and its durability.\n<\/p><\/div><\/div>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t

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    Types of Lasers for Marking Plastics\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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    For plastics, the choice of laser depends on the type of polymer, color, additives, finish, and expected result. At COUTH, the laser technologies relevant to this group of materials are <\/span>CO\u2082, fiber, and MOPA<\/b>.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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