Laser-absorbing molding compositions with low carbon black contents

a technology of carbon black and thermoplastics, applied in the direction of lamination, layered products, lamination apparatuses, etc., can solve the problems of inability to achieve 100% fitting accuracy, inability to use black thermoplastic molding compositions, and inability to use carbon black as laser beam welding laser absorber, etc., to achieve good surface quality, good surface quality, and similar optical appearance
US20050217790A1Inactive Publication Date: 2005-10-06JOACHIMI DETLEV +4
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
JOACHIMI DETLEV
Publication Date
2005-10-06
Estimated Expiration
Not applicable · inactive patent

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Abstract

The present invention relates to natural-colored and pigmented thermoplastic molding compositions and molded parts fabricated therefrom that are laser-absorbing at least in partial spectral regions of the wavelength range from 700 to 1200 nm and that can be welded by laser beam welding and to molded parts that are transparent or translucent to laser light.
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Description

FIELD OF THE INVENTION

[0001] The present invention relates to natural-colored and pigmented thermoplastic molding compositions and molded parts fabricated therefrom, which are laser-absorbing at least in regions of the spectrum in the wavelength range from 700 to 1200 nm. Further, the present invention relates to molding compositions that can be welded by laser beam welding and to molded parts that are transparent or translucent to laser light. BACKGROUND OF THE INVENTION

[0002] Various processes exist for welding plastic molded parts, see for example, Kunststoffe 87, (1997), 11, 1632-1640. A prerequisite for a stable weld joint in heated element welding and vibration welding processes, such as used for vehicle manifold pipes, is a sufficient softening of the joining partners in the contact zone before the actual joining stage.

[0003] When pressing welding partners together, a decisive factor for the strength of the weld joint to be formed is that the applied pressure lies in a spe...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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