Laser-ablating a marking in a coating on plastic articles

Details Laser-ablating a marking in a coating on plastic articles Laser-ablating a marking in a coating on plastic articles

1990-01-25

1991-10-29

Beck, Shrive

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156643, 427 531, 427 541, 427 561, 21912169, B05D 306, B44C 122, B23K 2600

Patent

active

050613413

ABSTRACT:
There is disclosed a method of laser-marking plastic articles without unduly damaging the plastic. The method comprises coating the plastic with a contrasting color layer, and intermediate the color layer and the plastic, a protective layer of a dried coverage of at least 1.5 g/m.sup.2.
Optionally, the ablation can be carried out beyond the stripe portion to be marked, to clear away any debris from the white support that otherwise can be left behind by the ablation.

REFERENCES:
patent: 4245003 (1981-01-01), Oransky et al.
patent: 4323755 (1982-04-01), Nierenberg
patent: 4514456 (1985-04-01), Deal et al.
patent: 4515867 (1985-05-01), Bleacher et al.
patent: 4588674 (1986-05-01), Stewart et al.
patent: 4639745 (1987-01-01), Matsui et al.
patent: 4865873 (1989-09-01), Cole, Jr. et al.
patent: 4939012 (1990-07-01), Dust et al.
SME Technical Paper, "Image Micro-Machining with Tea CO.sub.2 Lasers," 1975.

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