Method of marking an article having at least a polyolefin surface and an article having a polyolefin surface provided with a black mark of decomposed polyolefin
US4578329A · kind A · utility
55Cited by
2References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 23, 1983 |
| Grant date | Mar 25, 1986 |
| Priority date | — |
| Expiry date | Nov 23, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24736
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
This invention concerns a method of marking articles having a polyolefin surface by exposure to a laser beam. The polyolefin contains a sufficient amount of a laser radiation absorbing substance for decomposing the polyolefin, so that a black mark of decomposed polyolefin will be formed. The laser radiation absorbing substance is a silicon compound, preferably a metal silicate, e.g. calcium-metasilicate or kaoline. The invention also comprises an article having a polyolefin surface, provided with a black mark of decomposed polyolefin formed by a laser beam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.