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Highly transparent laser-markable and laser-weldable plastic materials

A plastic material, high-transparency technology, applied in thermography, replication/marking methods, nanotechnology for materials and surface science, can solve the problem of not being known, etc.

Inactive Publication Date: 2014-08-06
EVONIK OPERATIONS GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Highly transparent laser-markable and laser-weldable plastic materials, especially those with additional resistance to atmospheric aging, are not known from the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Preparation of highly transparent laser-sensitive plastic moldings

[0057] A plastic molding compound containing laser-sensitive nanoscale pigments is melted in an extruder and injected into an injection mold to form plastic moldings in sheet form or extruded to form flat sheets, films or tubes.

[0058] The mixing of the laser-sensitive pigments into the plastic molding compound is carried out under strong shear in order to break down any agglomerated particles that may be present into nanoscale primary particles.

Embodiment approach A

[0060] Use of the commercialized product Trogamid from Marl, the performance polymer division of Degussa AG CX 7323 as a plastic molding compound. Using 0.01% by weight concentration of nanoscale indium-tin oxide Nano ITO IT-05 C5000 as a laser sensitive pigment. The light transmittance in the visible light range is 90%, and the haze is 1.5%.

Embodiment approach B

[0062] Use of the commercialized product Plexiglas from Darmstadt, the methacrylate division of Degussa AG 7N as a plastic molding compound. Using 0.001% by weight concentration of nanoscale indium-tin oxide Nano ITO IT-05 C5000 as a laser sensitive pigment. In the case of extrusion, Plexiglas can also be used preferably High molecular weight molding compound of type 7H. The light transmittance in the visible light range is 92%, and the turbidity is <1%.

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PUM

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Abstract

The present invention relates to high-transparency plastic materials which are laser-markable and / or laser-weldable due to a content of nanoscale laser-sensitive metal oxides. These plastic materials, which may be provided as molded bodies, semifinished products, molding compounds, or lacquers, particularly contain metal oxides having particle sizes from 5 to 100 nm and a content of 0.0001 to 0.1 weight-percent. Typical metal oxides are nanoscale indium-tin oxide or antimony-tin oxide. These materials may be used in particular for producing laser-markable production products.

Description

technical field [0001] The present invention relates to highly transparent plastic materials which are laser-markable and / or laser-weldable due to the inclusion of nanoscale laser-sensitive metal oxides, to a process for the production of such plastic materials and to their use . Background technique [0002] The identification of plastics by laser marking and the welding of plastics also using laser energy are known per se. Both are caused by absorption of laser energy in the plastic material either directly through interaction with polymers or indirectly using laser sensitizers added to the plastic material. Laser sensitizers may be organic colorants or pigments that cause localized noticeable discoloration of plastic materials through the absorption of laser energy. It can be a compound that changes from an invisible, colorless form to a visible form when irradiated with laser light. In laser welding, the plastic material is heated strongly by the absorption of laser e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41M5/26C08K3/22C08K9/02
CPCB29C65/16B29C65/1606B29C65/1616B29C65/1619B29C66/71B41M5/267B82Y30/00C08K3/22C08K2201/011B29C66/73365B41M5/26C08K3/00
Inventor 哈拉尔德·黑格尔托马斯·哈斯克尔罗兰·乌尔舍京特·伊特曼汉斯-京特·洛肯佩尔克劳斯-迪特尔·许贝尔
Owner EVONIK OPERATIONS GMBH