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US 6,617,515 B1Granted
Polytetrafluoroethylene coating material for laser marking
AssigneeCompagnie Plastic Omnium
InventorChor Keung Yeung
Life of this patent
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Abstract
A coating material based on polytetrafluoroethylene (PTFE) containing pigments and suitable for marking with a UV laser includes raw PTFE, 0.01 to 5 wt. % titanium oxide pigment, and 0.1 to 5 wt. % of one or more of arylene sulfide polymers, particularly polyphenylene sulfide (PPS); polyarylsulfones, in particular polysulfone (PSU) or polyethersulfone (PES); and polyaryletherketones, in particular polyetherketone (PEK) or polyetheretherketone (PEEK).
Claims9
A marked article, comprising:
- an article with a surface comprising a composition comprising:
- A) PTFE;
- B) 0.01 to 5 wt. % of at least one titanium oxide pigment;
- and
- C) 0.1 to 5 wt. % of at least one organic polymer selected from the group consisting of arylene sulfide polymers, polyarylsulfones and polyetherketones,
- wherein said surface of said article has label marked with a laser over less than an entire surface of said composition.
3 more elements
Dependencies are inferred from the claim text.