Composition for laser marking

A technology of laser marking and composition, which is applied in the direction of copying/marking method, temperature recording method, application of radioactive source radiation, etc., and can solve problems such as dark background color distortion

Inactive Publication Date: 2002-10-30
SABIC GLOBAL TECH BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at this level, the dye or pigment distorts the

Method used

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Examples

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Example Embodiment

[0047] Example 2, which illustrates the present invention, contains copper chromite with a spinel structure and no dye or pigment used as a marking agent. This embodiment has a black background color and a good contrast between the white laser mark and the black background without discoloration.

[0048] In a manual mixer, by blending the polycarbonate resin (PC-125, molecular weight about 23,300) shown in Table 2, 1wt% methyl methacrylate butadiene styrene copolymer, 0.5wt% stearin Pentaerythritol acid, 0.1wt% of I168 (Ciba Geigy's stabilizer), 0.05wt% of Irganox 1076 (CIBA's antioxidant), and extrude the sample in a Werner & Pfleiderer extruder at a temperature of 270°C , And the preparation of Reference Example DO and Examples 3-6. Before pelletizing, the extrudate was cooled by a water bath. The test samples were injected in a Demag injection molding machine set at a temperature of 290°C. Before injection, the resin was dried in a forced air circulation oven at 120°C for two h...

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PUM

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Abstract

A resin composition with laser marking properties, comprising a polycarbonate resin, an effective amount of copper chromite having a spinel structure and carbon black at most 0.05% by weight of the total composition, wherein the polycarbonate resin Foam over the laser-irradiated area to create a bright colored mark of the laser-irradiated area on a dark background.

Description

field of invention [0001] The present invention relates to a resin composition suitable for marking with a laser and a method for laser marking. Background of the invention [0002] Laser beams provide an economical and fast method of writing, bar coding and decorative marking on plastics. The advantage of this technique over common printing techniques is that the layout can be adjusted and integrated into the production line using a graphical computer program. The laser marking method is a process of placing characters such as letters, figures and symbols, bar codes or images on a surface by irradiating a target surface with laser light using a laser. Laser marking is a contactless procedure; thus it is possible to mark even on soft, irregular surfaces that are not easily accessible. Laser marking is ink-free, which provides long-lasting application, and it is solvent-free, making it more environmentally friendly. [0003] Several laser types are available for marking pl...

Claims

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Application Information

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IPC IPC(8): B41M5/26C08K3/04C08K3/24C08K5/00C08L69/00
CPCB41M5/267C08K3/04C08K3/24Y10S430/146Y10S430/142C08L69/00B41M5/26
Inventor A·拉姆洛T·J·利利T·L·赫克斯
Owner SABIC GLOBAL TECH BV
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