Laser markable polytetrafluoroethylene resin material and method of making
US5501827A · kind A · utility
21Cited by
13References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 8, 1995 |
| Grant date | Mar 26, 1996 |
| Priority date | — |
| Expiry date | Feb 8, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K3/22
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A laser markable composite material which when so marked retains good color contrast after heat aging. The material comprises polytetrafluoroethylene resin, photosensitive filler material and an extrusion aid. The photosensitive material is preferably a metal oxide and has a larger mean particle size than typical pigments. Also disclosed is a sequence of milling, mixing and blending steps which forms the desired composite material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.